A method for obtaining the position angle of the motor rotor

Abstract

The invention relates to a method for obtaining the position angle of the motor rotor, which corrects the installation error of the Hall rotor position sensor on the motor stator, has simple structure, clear thinking, convenient operation, and can accurately obtain the real-time position angle of the motor rotor, solving the problem In the technology, the installation error detection method of the Hall rotor position sensor has defects and deficiencies such as low efficiency and complex engineering implementation, and has low cost, strong practicability, good use effect, and is convenient for popularization and use.

Description

technical field [0001] The invention relates to a method for obtaining the position angle of a motor rotor. Background technique [0002] In the field of motor control technology, in order to realize the precise positioning of the servo motor and the three closed-loop control of position, speed and current, it is often necessary to know the position or speed information of the motor rotor, which can be obtained by installing a rotor position detector. Generally, the rotor position detector includes sensor devices such as photoelectric encoder disc, resolver, inductive synchronizer, linear Hall, switch Hall, etc. In addition to switch-type Hall sensors, other position detectors have high detection accuracy, but are expensive, and are not suitable for the field of motion control with high cost requirements. [0003] In order to expand the application of motors in low-cost electric drive systems, a switch-type Hall sensor with a small size, no contact, easy installation, and a...

AI Technical Summary

Problems solved by technology

Using the Hall sensor to detect the rotor position is to install the Hall sensor on the stator of the motor. However, the assembly error of the Hall rotor position sensor (there is no installation error for a single Hall) will cause the actual rotor position of the motor to be different from that passed through the Hall sensor. There is an error between the rotor positions detected by the sensor. The existence of this detection error will cause the estimated electrical angle waveform to be not an ideal sawtooth wave. Using this electrical angle to participate in the calculation of the drive signal will cause the motor phase current distortion and reduce the motor The speed regulation performance

[0004] At present, the detection of the installation error of the Hall-type motor rotor position sensor usually uses the method of manual experiment to adjust the installation position of the Hall position sensor. This method is limited by the experience of the debugging personnel, resulting in different debugging results. The whole process is inefficient and time-consuming.

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