Rotary transformer state detection method and device, digital signal processing chip and medium

Abstract

The invention discloses a rotary transformer state detection method and device, a digital signal processing chip and a medium. The method comprises the following steps: acquiring a current rotation angle fed back by a resolver; calculating a rotation angle difference value between the current rotation angle and a previous rotation angle, and comparing the rotation angle difference value with a difference value threshold value; and if the rotation angle difference is greater than the difference threshold, judging that the rotary transformer is in an abnormal state, and feeding back and correcting the rotation angle according to an abnormal hopping mechanism. Therefore, the current state of the rotary transformer is judged based on the rotation angle, and the rotation angle is fed back and corrected according to the abnormal jump mechanism when the rotary transformer is in the abnormal state, so that the accuracy of rotary transformer state detection is improved, and the stable operationof wind power variable pitch is ensured.

Description

technical field [0001] The invention relates to the field of resolver technology, in particular to a resolver state detection method, device, digital signal processing chip and medium. Background technique [0002] Most of the existing wind power pitch drives use a resolver (Switching Virtual Circuit, resolver) as the encoder for the position feedback of the permanent magnet synchronous motor. Ye Shun returned to a safe position. [0003] At present, the state of the resolver is generally detected through the level signal of the resolver hardware. If the level signal is abnormal, it means that the resolver is abnormal. However, in the abnormal situation where only one wire of the resolver is broken, the cable is in poor contact, and the electromagnetic interference is strong, the level signal may be a normal high level, but the resolver is actually in an abnormal state. Therefore, the accuracy of the method of detecting the state of the resolver through the level signal is...

AI Technical Summary

Problems solved by technology

However, in the abnormal situation where only one line of the resolver is broken, the cable is in poor contact, and the electromagnetic interference is strong, the level signal may be a normal high level, but the resolver is actually in an abnormal state

Therefore, the accuracy of the method of detecting the state of the resolver through the level signal is not high enough

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