This standard specifies the product classification, general technical requirements, test methods, inspection rules, quality assurance period and marking, packaging, transportation and storage of single-winding linear rotary transformers. This standard applies to single-winding linear rotary transformers with frame sizes 20 to 45. This standard should be used together with the special technical conditions for single-winding linear rotary transformers. Its specific technical indicators and additional or special requirements are specified in the special technical conditions. JB/T 5782-1991 General Technical Conditions for Single-winding Linear Rotary Transformers JB/T5782-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T 5782-1991
General Technical Conditions for Single-winding Linear Rotary Transformers Published on October 17, 1991
Implementation by the Ministry of Machinery and Electronics Industry of the People's Republic of China on October 1, 1992
Mechanical Industry Standard of the People's Republic of Chinawww.bzxz.net
General Technical Conditions for Single-winding Linear Rotary Transformers Subject Content and Scope of Application
JB/T5782-1991
This standard specifies the product classification, general technical requirements, test methods, inspection rules, quality assurance period and marking, packaging, transportation and storage of single-winding linear rotary transformers. This standard applies to single-winding linear rotary transformers with frame sizes 20 to 45. This standard should be used together with the special technical conditions for single-winding linear rotary transformers. Its specific technical indicators and additional or special requirements are specified in the special technical conditions.
Cited standards
GB2900.26 Electrical terminology Control micromotor GB7342
GB7345
GB7346
GB10405
3 Product classification
Technical conditions for packaging of control micromotor
Basic technical requirements for control micromotor
Basic appearance and structure of control micromotor
Model naming method of control micromotor
Main varieties and specifications
For the varieties and specifications of single-winding linear rotary transformers, see Appendix A (reference) 3.2 Model naming
The model of single-winding linear rotary transformer is in accordance with the provisions of GB10405, that is, it consists of four parts: frame number, product name code, performance parameter code (this product uses characteristic code) and derived code. 3.2.1 Model Example
3.2.2 Performance Parameter Code
Deep code (A is the first derivative)
Performance Parameter Code (Characteristic Code)
Product Name Code (Single Winding Linear Rotary Transformer) Frame Size (Casing Outer Diameter is 28mm)
The third part of the model indicates the characteristic code, which consists of 4 digits. 3.2.2.1 Impedance Code
The first two digits of the performance parameter code are expressed as one percent of the impedance (nominal value) ohm number. 3.2.2.2 Voltage Gradient Code
Approved by the Ministry of Machinery and Electronics Industry on October 17, 1991 and implemented on October 1, 1992
JB/T5782-1991
The third digit of the performance parameter code is the voltage gradient code. The corresponding relationship between the voltage gradient code and the voltage gradient is shown in Table 1. Table 1
Voltage gradient
Voltage gradient code
3.2.2.3Linear working range code
The fourth digit of the performance parameter code is the linear working range code. The corresponding relationship between the linear working range code and the linear working angle range is shown in Table 2.
Linear working range
Linear working range code
3.3Appearance and installation dimensions
±60°
± 50°
±30°
±20°
The appearance and installation dimensions of the single-winding linear rotary transformer shall comply with the provisions of GB7346 or special technical conditions. The 20th frame adopts K1 as the basic type. The 28th, 36th and 45th frames adopt K3 as the basic type. The basic shaft extension adopts the optical shaft extension.
3.4 ​​Main technical data
Rated frequency: 400Hz, (1000Hz); Rated voltage: 26V for frame 20;
26V or 36V for frame 28;
36V or 60V for frame 36;
36V, 60V or 115V for frame 45;
Voltage gradient: 0.1, 0.2; 0.3; 0.5V/();d. Open circuit input impedance: 400, 600, 1000, 20000.3.5 Rotation direction
±10°
From the non-outlet end, the counterclockwise rotation of the shaft is the positive direction of rotation, and the positive direction of the electrical angle is consistent with the positive direction of rotation. 3.6 Circuit diagram
The circuit diagram of the single-winding linear rotary transformer is shown in Figure 1. Ro
3.7 Vector diagram and voltage equation
3.7.1- Vector diagram
b Stator excitation
Rotor excitation
Figure 1 Circuit diagram of single-winding linear rotary transformer When the rotation angle of a single-winding linear rotary transformer is positive, the input voltage is positive and the output voltage should conform to the vector relationship in Figure 2. o
3.7.2 Voltage equation
JB/T5782-1991
Rotor excitation
b Stator excitation
Figure 2 Vector diagram of single-winding linear rotary transformer Within the linear operating range, the output voltage for any rotor angle should conform to the rotor excitation voltage equation (1) or the stator excitation voltage equation (2).
KURR3g-u
KUs8=u0
Where:
The voltage ratio between the output voltage and the input voltage at the maximum linear working angle. Maximum linear working angle (°);
—Electrical angle (), -ba≤6≤bmar
4 Technical requirements
Environmental conditions
Voltage gradient V/()
The environmental conditions for the use of single-winding linear rotary transformers shall be as specified in Table 1 of GB7345. When there are special requirements, the temperature and air pressure in the environmental conditions for use may be selected from the numerical system specified in Article 1.2 of GB7345. 4.2 Reference electrical zero position
The single-winding linear rotary transformer satisfies the vector relationship and corresponding voltage equation in Figure 2. The rotor position when the output voltage is the minimum is the reference electrical zero position.
4.3 Lead-out terminals and markings
The lead-out terminals of single-winding linear rotary transformers can be lead-out wires or terminal blocks. Lead-out wires are used for 20 and 28 frames; terminal blocks are used for 28, 36, and 45 frames. The lead-out wire length shall not be less than 200 mm. Lead-out wire markings are indicated by different colors, and terminal block lead-out markings are indicated by letters and numbers. When lead-out wires are used, sleeves may be added to the outside of the lead-out wires.
Lead-out wire color, terminal block marking, and sleeve color shall comply with the provisions of Table 3. Table 3
Winding name
Terminal board mark
Lead wire color
Casing color
Rotor winding
Red-white
Note: R, start; R, -end; S, -start; S, end. Approximate reference electrical zero position mark
Black-white
Stator winding
The wiring of the single-winding linear rotary transformer should be correct, that is, it should comply with the vector relationship in Figure 2, and make obvious and permanent approximate reference electrical zero position marks on its housing and shaft extension.
The deviation of the mark relative to the reference electrical zero position should not exceed 10°. 3
4.5. Appearance and shape
JB/T5782-1991
The appearance and shape of the single-winding linear rotary transformer shall comply with the provisions of Articles 3.2.1 and 3.2.4 of GB7345 and Article 3.1 of GB7346 as well as the provisions of the special technical conditions.
4.6 Change of brush contact resistance
The change of brush contact resistance between the winding terminals R1 and R1 of the single-winding linear rotary transformer shall comply with the provisions of Article 3.6 of GB7345.
After the identification test or periodic test, for products with a rotor resistance of 200Ω or less, the change of contact resistance shall not exceed 1.5n: the maximum change allowed after the strong impact test is 2.25. For products with a rotor resistance greater than 200n, the change of contact resistance shall not exceed 0.750% of the measured rotor resistance; after the strong impact test, the maximum change allowed for contact resistance is 1.125% of the measured rotor resistance. 4.7 Radial clearance
The radial clearance of a single-winding linear rotary transformer shall comply with the provisions of the special technical conditions under the action of a force of 3N. After the identification test or periodic test, the radial clearance is allowed to be 1.5 times the maximum value specified in the special technical conditions. After the strong impact test, it is allowed not to exceed 2.25 times the maximum value specified in the special technical conditions. 4.8 Axial clearance
The axial clearance of a single-winding linear rotary transformer shall comply with the provisions of the special technical conditions. The force for frame sizes 28 and below is 5N, and the force for frame sizes 36 and above is 10N.
After the identification test or periodic test, the axial clearance is allowed to be 1.66 times the maximum value specified in the special technical conditions. After the strong impact test, it is allowed not to exceed 2.5 times the maximum value specified in the special technical conditions. 4.9 Friction torque
The friction torque of a single-winding linear rotary transformer shall comply with the provisions of the special technical conditions. After the identification test or periodic test, the friction torque is allowed to increase to 2 times the value specified in the special technical conditions. After the strong impact test, the friction torque is allowed to increase to 3 times the value specified in the special technical conditions. 4.10 Insulation dielectric strength
The insulation dielectric strength of a single-winding linear rotary transformer shall comply with the provisions of Article 3.7 of GB7345. After the strong impact test, when the test voltage is 80% of the initial test voltage, the leakage current of the winding shall not exceed 1.5mA. 4.11 Insulation resistance
The insulation resistance of a single-winding linear rotary transformer shall comply with the provisions of Article 3.8 of GB7345. After the strong impact test, for products that have undergone insulation dielectric strength tests, the insulation resistance is allowed to be reduced to 25Mn. 4.12 No-load current
Under the condition of rated voltage excitation, when the output winding of a single-winding linear rotary transformer is open, the current flowing through the input winding shall comply with the provisions of the special technical conditions.
4.13 Power consumption
Under the condition of rated voltage excitation, the output winding of the single-winding linear rotary transformer is open-circuited, and the input power consumption shall be within the limit value specified in the special technical conditions.
4.14 Impedance
The impedance of the rotor winding and stator winding of the single-winding linear rotary transformer shall comply with the provisions of the special technical conditions. 4.14.1 Open-circuit input impedance Zro (Zso) 1) The impedance of the input terminal when the output terminal is open-circuited
4.14.2 Short-circuit output impedance Zss (Zg) \ The impedance of the output terminal when the input terminal is short-circuited, and this impedance is measured at the maximum linear working angle position. 4.14.3 Short-circuit input impedance Zrs (Zse) \) The impedance of the input terminal when the output terminal is short-circuited, and this impedance is measured at the positive maximum linear working angle position. 4.14.4 Open-circuit output impedance Zso (Zro) \) The impedance of the output terminal when the input terminal is open-circuited. JB/T5782-1991
Note; 1) The impedance in brackets is the impedance code when the stator is excited. 4.15 Voltage gradient
The voltage gradient of a single-winding linear rotary transformer is the ratio of the fundamental component of the output voltage to the angle of the rotor rotation, which shall comply with the provisions of the special technical conditions.
4.16 Phase shift
The phase shift (expressed in electrical angle) of a single-winding linear rotary transformer is the difference between the time phase of the fundamental component of the output voltage and the time phase of the fundamental component of the input voltage at the position of the positive or negative maximum linear operating range, which shall comply with the provisions of the special technical conditions. 4.17 Linear error 6,
The linear error expression of a single-winding linear rotary transformer at any rotor position within the linear operating range is: ?×100%
Where: U\. - When the rotor angle is θ, the measured output voltage fundamental wave in-phase component (in phase with the maximum output voltage); U,
-The ideal value when the rotor angle is;
-The ideal output voltage at the maximum linear working range angle. The linear error of a single-winding linear rotary transformer shall be graded, and its value shall not be greater than that in Table 4 or the provisions of the special technical conditions. Table 4
Accuracy grade
Linear error
After the identification test or periodic test, the linear error shall not be greater than 1.25 times the specified value, and shall not be greater than 1.5 times the specified value after the strong impact test.
4.18 Zero voltage
The fundamental wave and total value of the zero voltage of a single-winding linear rotary transformer shall comply with the provisions of the special technical conditions. After the strong impact test, the fundamental wave and total value of the zero voltage are allowed to increase by 50% compared with the specified value in the special technical conditions. 4.19 Linear operating range
The linear operating range of a single-winding linear rotary transformer is the angular range within which the output voltage is linearly related to the rotor angle within this angular range. This angular range shall comply with the provisions of the special technical conditions. Terminal or lead strength
The strength of each lead, each threaded terminal and each terminal lug of a single-winding linear rotary transformer shall comply with the requirements of Article 3.9 of GB7345.
4.21 Drift of reference electrical zero position with frequency When the special technical conditions require it, the drift of reference electrical zero position with frequency of a single-winding linear rotary transformer shall comply with the provisions of the special technical conditions.
4.22 Electromagnetic interference
When the special technical conditions require it, the electromagnetic interference of a single-winding linear rotary transformer shall comply with the provisions of the special technical conditions. 4.23 Temperature rise
The temperature rise of a single-winding linear rotary transformer shall not exceed the provisions of the special technical conditions. 4.24 Vibration
4.24.1 Fixed amplitude vibration
Single-winding linear rotary transformers should be able to withstand the vibration test specified in Article 3.18.1 of GB7345 and the special technical conditions. During the test, no mechanical damage, loose fasteners or poor contact should occur. After the test, check according to No. 21 in Table 7 and ensure that it meets the requirements. 5
4.24.2 High frequency vibration
JB/T 5782—1991
The single-winding linear rotary transformer shall be able to withstand the test specified in Article 3.18.2 of GB7345 and the special technical conditions. No mechanical damage, loose fasteners or poor contact shall occur during the test. After the test, check according to No. 22 in Table 7 and meet the requirements. 4.25 Impact
4.25.1 Pulse impact
The single-winding linear rotary transformer shall be able to withstand the test specified in Article 3.19.1 of GB7345 and the special technical conditions. No mechanical damage, loose fasteners or poor contact shall occur during the test. After the test, check according to No. 23 in Table 7 and meet the requirements. 4.25.2 Strong impact
When the special technical conditions require it, the single-winding linear rotary transformer shall be able to withstand the strong impact test specified in Article 5, 13.2 of GB7345. After the test, check according to No. 33 in Table 7 and meet the requirements. 4.26 Low pressure
4.26.1 Low temperature and low pressure
Single winding linear rotary transformer shall be able to withstand the low temperature and low pressure test specified in Article 3.17.1 of GB7345. Check according to Table 7, No. 2°C and meet its requirements.
4.26.2 High temperature and low pressure
Single winding linear rotary transformer shall be able to withstand the high temperature and low pressure test specified in Article 3.17.2 of GB7345: Check according to Table 27 and meet its requirements.
4.27 Ambient temperature
4.27.1 Low temperature
Single winding linear rotary transformer shall be able to withstand the temperature test specified in Article 3.14 of GB7345 and the special technical conditions. Check according to Table 24 and meet its requirements.
4.27.2 High temperature
Single-winding linear rotary transformers shall be able to withstand the high temperature test specified in Article 3.15 of GB7345 and the special technical conditions, and shall be checked according to No. 25 in Table 7 and meet the requirements.
4.28 Damp heat
4.28.1 Steady damp heat
Single-winding linear rotary transformers shall be able to withstand the damp heat test specified in Article 3.21.1 of GB7345, and after the test, shall be checked according to No. 28 in Table 7 and meet the requirements.
4.28.2 Alternating damp heat
Single-winding linear rotary transformers shall be able to withstand the damp heat test specified in Article 3.21.2 of GB7345, and after the test, shall be checked according to No. 29 in Table 7 and meet the requirements.
4.29 Salt spray
When the special technical conditions require, the single-winding linear rotary transformer shall be subjected to the benefit test specified in Article 3.25 of GB7345 and meet its requirements.
4.30 Explosion
When the special technical conditions require, the single-winding linear rotary transformer shall be subjected to the explosion test specified in Article 3.24 of GB7345 without causing explosion.
4.31 Life
The life of the single-winding linear rotary transformer shall not be less than 2000h. After the life test is completed, check according to No. 32 in Table 7 and meet its requirements. 5 Test method
5.1 Climate conditions
5.1.1 Normal climate conditions
According to the provisions of Article 3.1.1.1 of GB7345.
5.1.2 Arbitration climate conditions
According to the provisions of Article 3.1.1.2 of GB7345.
5.1.3 Reference climatic conditions
According to the provisions of Article 3.1.1.3 of GB7345.
5.2 Test voltage and frequency
JB/T5782-1991
The test voltage and frequency are the rated voltage and frequency of the primary winding specified in the relevant special technical conditions. Unless otherwise specified, the deviation of the amplitude and frequency of the test voltage is ±1%, and the spectral harmonic component is 1%. The waveform distortion of the test voltage relative to the waveform of the standard sine wave with the same effective value shall not exceed 1% of the sine wave amplitude at all corresponding coordinates. 5.3 Stable temperature without power supply
The stable temperature without power supply of single-winding linear rotary transformer shall comply with the provisions of Article 3.1.5.1 of GB7345 and be determined by regularly measuring the DC resistance of the output winding.
5.4 Stable operating temperature with power supply
The stable operating temperature with power supply of single-winding linear rotary transformer shall comply with the provisions of Article 3.1.5.2 of GB7345. It shall be determined by regularly measuring the DC resistance of the output winding.
5.5 Test device and instruments
5.5.1 Angular indexing device
The error of the angular indexing device shall not exceed 20°. When a single-winding linear rotary transformer is connected to an angular indexing device, the comprehensive error caused by the installation eccentricity shall not exceed 30".
For a single-winding linear rotary transformer with a linear working range of ±10°, the error of the indexing device shall not exceed 10\, and the comprehensive installation error shall not exceed 15\.
5.5.2 Phase-sensitive nulling instrument
The input impedance of the phase-sensitive nulling instrument shall not be less than the impedance of 500kQ and 30pF in parallel. Its minimum indication shall be able to distinguish the output voltage of the single-winding linear rotary transformer when it deviates from the zero position by 0.2', and shall have the ability to suppress harmonic voltage and orthogonal voltage. When the harmonic voltage and orthogonal voltage reach 1% and 0.2% of the maximum output voltage of the product respectively, the instrument indications produced by the two shall not be greater than the instrument indications produced by the rotor of the tested product deviating from the zero position by 0.2'. 5.6 Several provisions in the test
5 .6.1 During the linear error test, the housing of the tested product and the compensation motor should be grounded. 5.6.2 The reference phase of the phase-sensitive zero indicator refers to the phase of the output voltage when the rotor of the single-winding linear rotary transformer starts from the reference electrical zero position and rotates forward to the maximum linear working angle. 5.6.3 The winding outlet markings and illustrations in this standard are marked according to the rotor as the input side. When the stator is the input side, they should be interchanged according to Figure 1 (b). In the
test, when the actual voltage value measured is greater than the theoretical value, the deviation symbol is "ten" and when it is less than the theoretical value, it is "two". 5.6.4
5 The performance after the environmental condition test is relaxed and cannot be accumulated. 5.6.5
15\. In the
test, the error when the rotor returns to the reference zero position and the compensation point should not be greater than 30\, and when the linear working range is ±10°, it should not be greater than the allowed confirmed and guaranteed Other methods to verify the test accuracy shall be used to measure product performance. When arbitrating product performance, the standard method in 5.6.73 of this standard shall be followed.
5.7 Approximate reference electrical zero mark and lead terminal mark 5.7.1 Lead terminal
mark Check the terminal lead-out method, marking code, color, length and sleeve color. They should comply with the provisions of 4.3. 5.7.2 Approximate electrical zero mark
Connect the wires according to Figure 3, first determine the positive and negative directions of the phase-sensitive zero pointer, add the input voltage to the reference input terminal and signal input terminal of the phase-sensitive zero pointer, adjust the phase-sensitive zero pointer phase shift potentiometer to maximize the positive deflection of the phase-sensitive zero pointer, and then connect the wires according to Figure 4, turn the rotor to the maximum positive deflection, and fine-tune the phase-sensitive zero pointer phase shift potentiometer to make the phase-sensitive zero pointer only deflect to the maximum (without changing its original direction). Turn the rotor again Make the fundamental wave in-phase component indicated by the phase-sensitive zeroing instrument zero. Then this position is the reference electrical zero position of the stator and rotor marks. Make the reference electrical zero position mark according to the requirements of Article 4.4. .
5.8 Appearance and appearance
Phase-sensitive zeroing instrument
Reference input terminal
Signal input terminal
Phase-sensitive zeroing instrument direction correction wiring diagram
Phase-sensitive input terminal
Reference input terminal
Signal input terminal
Figure 4 Reference electrical zero position inspection circuit diagram
The appearance and appearance of the single-winding linear rotary transformer shall be inspected in accordance with the provisions of 4.5 and shall meet its requirements. 5.9. Change of brush contact resistance
The change of brush contact resistance between the terminals R,, and R, of the single-winding linear rotary transformer shall be tested according to the method specified in 3.6 of GB7345 and shall meet the requirements of 4.6.
5.10 Radial clearance
The radial clearance of a single-winding linear rotary transformer shall be measured according to the method specified in 3.2.2 of GB7345 and shall meet the requirements of 4.7. 5.11 Axial clearance
The axial clearance of a single-winding linear rotary transformer shall be measured according to the method specified in 3.2.3 of GB7345 and shall meet the requirements of 4.8. 5.12 Friction torque
The friction torque of a single-winding linear rotary transformer shall be measured according to the method specified in 3.2.6.1 of GB7345 and shall meet the requirements of 4.9.
5.13 Insulation dielectric strength
JB/T57821991
The insulation dielectric strength of a single-winding linear rotary transformer shall be tested according to the test method specified in 3.7 of GB7345 and shall meet the requirements of 4.10.
5.14 Insulation resistance
The insulation resistance of a single-winding linear rotary transformer shall be tested in accordance with the method specified in 3.8 of GB7345 and shall comply with the requirements of 4.11. 5.15 No-load current
The no-load current of a single-winding linear rotary transformer shall be tested in accordance with the method specified in 3.3 of GB7345. During the test, rated excitation is used. After the stable operating temperature specified in 5.4 is reached, the output winding is open-circuited and the current flowing through the excitation winding shall comply with the requirements of 4.12. 5.16 Power consumption
The power consumption of a single-winding linear rotary transformer shall be tested in accordance with the method specified in 3.4 of GB7345. During the test, rated excitation is used. After the stable operating temperature specified in 5.4 is reached, the output winding is open-circuited and the power consumption shall comply with the requirements of 4.13. 5.17 Impedance
Impedance shall be measured in accordance with 3.5 and Table 5 of GB7345. During the test, the specified voltage shall be applied and the impedance shall be measured after the stable operating temperature specified in 5.4 is reached. The value shall meet the requirements of 4.14. Table 5
Connection ticket for measuring impedance
R,R, see Figure 5
S,S4, see Figure 5
S;Sa see Figure 7
R,R see Figure 8
Voltage applied to the terminal
Apply rated voltage
Apply voltage\
Apply voltage”
Apply voltage”
R,R, short-circuited winding, rotor in positive maximum linear working position; Note: 1)
SS winding open circuit
S,S, winding voltage applied, the voltage magnitude is the voltage when the short-circuited R,R, winding generates the current measured Zso. R,R, winding open circuit, S,S, winding voltage applied, the voltage magnitude is the output voltage at the maximum linear working range. 2)
StS. The winding is short-circuited, and the rotor is in the maximum positive linear working position. 3)
R, R, the winding voltage is applied, and the voltage is the voltage when the open-circuited R, R, winding produces the current measured by Z. The impedance is calculated according to formula (4):
Figure 5, ZRo measurement diagram
Zso measurement diagram
Zss measurement diagram
Rs measurement diagram
5.18 Voltage gradient
JB/T5782—1991
The single-winding linear rotary transformer is installed according to the provisions of 5.5.1 and connected according to Figure 9. Under rated excitation, when the stable working temperature specified in 5.4 is reached, it is adjusted to the reference electrical zero position according to 5.7. Rotate the rotor forward to the position of +b degrees, adjust the voltage-dividing resistor R to R. and the capacitor C to minimize the reading of the phase-sensitive zeroing instrument, and then rotate the rotor in the reverse direction to the position of -b degrees, adjust the voltage-dividing resistor R, to R and the capacitor C to minimize the reading of the phase-sensitive zeroing instrument.
The voltage gradient is calculated according to formula (5):
Where: 9—arctg 2 yuan fCR
C—capacitor, F,
R-resistance, a;
is the output voltage phase shift at the measuring point (°); the resistance at the maximum linear working angle, n. The voltage gradient at each point shall meet the requirements of 4.15. 5.19 Phase shift
The phase shift of the single-winding linear rotary transformer is measured in the forward and reverse directions according to 5.18. When the voltage gradient is measured, the phase shift measured should meet the requirements of 4.16.
C·Capacitor box
Figure 9 Wiring diagram for measuring voltage gradient and phase shift 5.20 Linear error
R=10kn
Phase-sensitive zeroing instrument
Single-winding linear rotary transformer is wired as shown in Figure 10. The housing of the tested motor and the compensation motor should be grounded. It should be installed as specified in 5.5.1. Under rated excitation, when the stable operating temperature specified in 5.4 is reached, it should be adjusted to the reference electrical zero position as specified in 5.7. Adjust the rotor to positive (6m./10)×9 degrees and fix it. Place the induction voltage divider box at 0.At the position of 90000, change the position of the compensator rotor and the phase shifter so that the fundamental in-phase component of the phase-sensitive nulling instrument is zero and the total value is the smallest. Then fix the compensator rotor and do not readjust it in subsequent tests.
According to the angles specified in Table 6, measure the linear error within the positive and negative maximum linear working angle range. For each given angle, the value of the inductive voltage divider box needs to be changed so that the fundamental in-phase component indicated by the nulling instrument is zero. The difference between the actual value of the inductive voltage divider box and the theoretical value specified in Table 6 multiplied by 100 is the linear error expressed as a percentage, and its value should meet the requirements of 4.17. R
Inductive divider
Phase-sensitive indicator
Figure 10 Linear error circuit diagram
Low impedance compensator
Or another type of
Another effective test single winding
Linear rotary transformer
Phase shifter
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.