Motor position determination method and device, motor, storage medium and processor

Abstract

The invention discloses a motor position determination method and device, a motor, a storage medium and a processor. The method comprises the following steps of acquiring q-axis current in dq-axis current of the motor, performing signal-to-noise ratio analysis on the q-axis current of the motor to obtain a current signal-to-noise ratio of the q-axis current of the motor, adjusting the amplitude of the set frequency pulse voltage according to the current signal-to-noise ratio of the q-axis current of the motor to obtain the current amplitude of the set frequency pulse voltage, and estimating the position of the motor by using the position estimator in a manner of injecting the set frequency pulse voltage according to the current amplitude of the set frequency pulse voltage. According to the scheme, the high-frequency loss of the motor can be reduced by adjusting the amplitude of the high-frequency vibration in the operation process of the motor.

Description

technical field [0001] The invention belongs to the technical field of motors (such as pure electric vehicles, motor drives, etc.), and specifically relates to a method for determining the position of a motor, a device, a motor, a storage medium and a processor, and in particular to a method for observing the position of a permanent magnet synchronous motor , devices, motors, storage media and processors. Background technique [0002] When the motor (such as a permanent magnet synchronous motor) is driven and controlled, the speed and position of the motor can be estimated by injecting a pulsed high-frequency voltage signal. By injecting a high-frequency voltage signal, the observation effectiveness of the motor at low speed (such as near zero speed) can be ensured, so that the motor control system can control the motor according to the observed speed and position data; however, injecting high The way of high-frequency voltage signal will aggravate the high-frequency vibrat...

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Problems solved by technology

[0004] The object of the present invention is to provide a method, device, motor, storage medium and processor for determining the position of a motor, so as to solve the problem of estimating the speed and position of the motor by injecting high-frequency voltage signals, which will aggravate the problems during the operation of the motor. High-frequency vibration increases the problem of high-frequency loss of the motor, and achieves the effect of reducing the high-frequency loss of the motor by adjusting the amplitude of high-frequency vibration during the operation of the motor

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