Angle acquisition method and related device

Abstract

The invention discloses an angle acquisition method and a related device. The angle acquisition method is used for the motor control system, and is characterized in that the motor control system comprises a motor and an angle sensor; and the motor comprises a first winding, a second winding and a rotor. The method comprises steps of obtaining a first estimation angle corresponding to a first winding, obtaining a second estimation angle corresponding to a second winding, wherein the first estimation angle is acquired according to the current of the first winding, and the second estimation angle is acquired according to the current of the second winding; obtaining a measurement angle through an angle sensor, wherein the measurement angle is the rotor angle obtained by the angle sensor; and determining the angle of the rotor according to the first estimated angle, the second estimated angle and the measurement angle, so that the reliability of the obtained angle of the rotor can be guaranteed, the safe and controllable operation of the motor can be guaranteed, excessive addition of angle sensors can be avoided, simplification of a hardware structure of a motor control system is facilitated, and cost is reduced.

Description

technical field [0001] The present application relates to the field of electronic control, in particular to an angle acquisition method and related devices. Background technique [0002] In the related art, in a motor control system, a motor is often used to realize its functions. The motor has two major indicators of high reliability control and high performance control. To achieve high-reliability control, the motor body needs phase redundancy or has a phase-loss control algorithm. Achieving high performance control requires precise motor rotor angles. Normally, the angle of the rotor is obtained by an angle sensor. In order to ensure the safe use of the motor, it is necessary to diagnose and verify the angle output by the motor angle sensor, so as to output a credible rotor angle for controlling the motor. When the angle sensor fails, it can quickly locate the faulty sensor and perform corresponding fault-tolerant control to ensure the safe and controllable operation ...

AI Technical Summary

Problems solved by technology

[0003] However, in the prior art, a reliable rotor angle is often obtained by using multiple angle sensors for redundant diagnosis and verification of the angle, so as to ensure the safe and controllable operation of the motor. Such a solution will lead to failure of the motor control system. Hardware redundancy, high cost

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