Hall sensor installation deviation identification and compensation method and device

Abstract

The invention belongs to the field of permanent magnet synchronous motor control, and particularly relates to a Hall sensor installation deviation identification and compensation method and device. The method comprises the following steps that: constant voltage-frequency ratio control is adopted, an output voltage is increased to improve an output torque, and a motor is enabled to stably rotate ata low frequency; a three-phase counter electromotive force signal and a three-phase Hall sensor signal are acquired, and the peak value of a counter electromotive force is recorded; when the edge signal of any Hall sensor is captured, a counter electromotive force numerical value of a corresponding phase is recorded, and an installation deviation angle is calculated according to the counter electromotive force numerical value of the corresponding phase and the peak value of the counter electromotive force; when the deviation angle is calculated, a deviation identification process is finished; and rotor position angle estimation is compensated through a method of adjusting an absolute position according to the calculated deviation angle. As for a traditional rotor angle estimation methodof a permanent magnet synchronous motor, a rotor angle estimation method is reconstructed by adopting the adjusted absolute position, and the reconstruction method is simple and high in transportability.

Description

technical field [0001] The invention belongs to the field of permanent magnet synchronous motor control, in particular to a Hall sensor installation deviation identification and compensation method and device. Background technique [0002] The permanent magnet synchronous motor has the advantages of simple structure, small size, light weight, low loss, high efficiency, high power factor, etc. It is widely used in electric vehicles, household appliances, industrial control and other industries. [0003] Permanent magnet synchronous motors use three switch-type Hall sensors as rotor position sensors in many application fields to obtain six absolute positions of the rotor. The installation of the three Hall sensors needs to be evenly distributed according to a certain angle. However, due to the uneven installation process, there are generally installation deviations in the Hall sensors of permanent magnet synchronous motors on the market, which directly affects the accuracy of ...

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Problems solved by technology

[0004] The invention provides a Hall sensor installation deviation identification and compensation method and device to solve the problem of poor adaptability of the permanent magnet synchronous motor Hall sensor installation deviation identification and compensation method in the prior art

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