**Applicable to type test, factory test and research test of the sine/cosine rotary transformer**

DH2000/RE1 sine/cosine rotary transformer applicable to type test, factory test and research test of the sine/cosine rotary transformer. In accordance with the national standard test method, we need frequency selective voltmeter, phase sensitive zero instrument, broadband voltage meter, ammeter broadband, induction voltage regulator, adjustable resistance, adjustable capacitance, phase shifter, power meter, etc. electric parameter test instrument, and also need to accompany the resolver.

The instrument system adopts a sine/cosine rotary transformer comprehensive test instrument can achieve high efficiency standards for all the test, and can automatically issue a test report and qualified judgment. (test instrument built-in high precision excitation power, the user does not need to buy another).

Reference standard

GB/T 2900.26-2008 electrical term control motor

● GB/T 7345-2008 basic technical requirement of control motor

● GB/T 10241-2007 general specification for rotary transformer

● GB/T 10404-2007 general specification for multi pole and dual channel rotary transformer

The main technical parameters of the sine/cosine rotary transformer include transformer ratio, no-load input impedance, phase shift, zero voltage, electrical error, function error, error of cross axis, harmonic distortion, etc..

These technical indicators are stationary rotating transformers’, are available through the measured electrical parameters analysis and calculation to obtain and electrical parameters include: rotating transformer excitation input, output of crude machine, precision machine output voltage and current. (first by the fundamental wave of the sine winding, cosine winding output voltage effective value proportional to determine electrical angle, after the electric angle is determined, most of the parameters can be obtained according to the fundamental value and the phase of the electrical parameter).

The zero voltage needs to be measured to remove the fundamental voltage and RMS value of the phase component, and the harmonic distortion should be carried out on the output voltage of the sine cosine winding.

All of these parameters can be obtained by the method of AC sampling and digital signal processing. AC sampling requires only three voltage channels and three current channels, that is, only three DT digital transmitter to achieve all the original information access. DT digital transmitter of the original information through DH2000-4 digital host transmission to the host computer, the host computer of six electrical parameters for analysis and computation, you can get a ratio of transformer, no-load input impedance, phase shift, zero voltage, electrical error, error function, axis error, the harmonic distortion parameters, and compare with the design values, are qualified to determine automatically issued testing report.

1.The new test ways, no need accompany test rotating transformer

Using the new test method without phase sensitive system, frequency selective voltmeter, phase shifter, even without the accompanying rotating transformer, the whole test process only need three DT digital transmitter and computer software realization of data records and conversion, the test process is simplified, improved the efficiency of the test.

2. Modern test technology, improve the accuracy of the test

DT digital transmitter can achieve wide value of high precision test, can accurately measure weak signal, a substantial increase in electrical error, error function, test accuracy error of the axis, zero voltage and other important parameters. In order to provide scientific data support for improving the technical specifications and quality of the rotary transformer.

3. Comprehensive decoding of rotary, state and performance parameters at a glance

● Real time display of the parameters such as the electrical angle, the ratio of voltage, the input impedance, the phase shift and the harmonic distortion.

● By comparing the actual steering angle and the angle of the screen to verify the wiring is correct or not.

● Real time display of the various winding voltage, current fundamental wave active value and input and output power.

● Can achieve real-time display of the various winding voltage and current waveform of the sine cosine rotary transformer, open the envelope selection button, but also can directly display the envelope of the sine cosine winding.

**According to the general technical conditions of "GB/T 10241-2007 rotary transformer", this instrument can complete the following test items:**

1. No-load current test √

2. No-load power consumption test √

3. Impedance test √

4. Ratio test √

5. Phase shift test √

6. Function error test √

7. Electrical error test √

8. Zero voltage test √

9. Cross axis error test √

10. Cross axis voltage test √

11. Harmonic distortion test √

12. Electrical zero position drift test √

13. Resonant frequency and cut-off frequency test (frequency response) √

14. Temperature rise test √

Main application

● Type test and factory test of sine/cosine rotary transformer● Research on the principle and characteristics of sine/cosine rotating transformer● Teaching of sine/cosine rotary transformer

● Fundamental voltage test accuracy: 0.1%

● Fundamental current test accuracy: 0.1%

● Fundamental power measurement accuracy: 0.2%

● Input impedance test accuracy: 0.2%

● The precision test of electrical angle: 5 "

● Electrical angular resolution: 1 "