A kind of fault detection method of resolver

Abstract

The invention provides a fault detection method for a rotary transformer. The method comprises steps that S1, in the start process, the motor rotor position information is detected and stored periodically, including the motor rotor position and the detection time; S2, detecting and storing the motor rotor position information start from the second cycle, and difference in the position change of each motor rotor in the cycle and the current change rate are obtained; S3, the first preset threshold is preset, each current change rate is compared with the first preset threshold, when any one of the current change rate exceeds the first preset threshold, increase of one failure is recorded; S4, if the number of failures after increase of one failure exceeds the second preset threshold, that thefault is a resolver fault is determined. The method is advantaged in that influence of error protection of the system on normal startup of the system can be prevented, false alarm is avoided, and reliability and security of the system are improved.

Description

technical field [0001] The present application belongs to the technical field of rotary transformers, and in particular relates to a fault detection method of rotary transformers. Background technique [0002] Due to its high efficiency, stable torque, and fast response, permanent magnet synchronous motors are gradually used in the starting control system of aviation motors. In this control system, the motor speed is an important parameter for motor starting control. Generally, it is calculated by the rate of change of the rotor position. Therefore, the accurate and reliable detection of the rotor position is the key to the control technology. In the commonly used sensors for detecting the rotor position, the resolver is compared with the Hall position sensor and the grating. As far as the encoder is concerned, it has significant advantages such as high temperature resistance, good impact resistance, and strong anti-interference ability. Therefore, in the aviation motor star...

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Problems solved by technology

[0003] At present, the research on the resolver in the aeronautical motor starting control system is mainly to study how to detect the rotor position of the motor to calculate the motor speed for motor start control. It does not involve the research on the fault detection method of the resolver, but it is in the Considering the safety of the aircraft, it is necessary to prevent the failure of the motor starting control caused by the wrong calculation of the motor speed, which will cause safety problems. It is necessary to detect the fault of the resolver in order to detect the potential danger of the system at an early stage and ensure the reliability of the system operation.

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