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A sensorless control method for high electric speed brushless DC motor

A technology of brushed DC motor and control method, which is applied in the direction of electronically commutated motor control, control system, electrical components, etc., and can solve the problems of inability to start the motor well and out of phase

Active Publication Date: 2021-09-07
SUZHOU ZHIYING ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the back EMF amplitude after low-pass filtering is too low when the motor is at low speed, and a small parameter difference may cause phase loss, and the motor cannot be started well at low speed (especially at high load). At the same time, the low-pass filter will bring phase shift, and it is necessary to calculate the filtered phase shift angle to compensate, and high-end MCU or DSP processing is required to obtain better results.

Method used

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  • A sensorless control method for high electric speed brushless DC motor
  • A sensorless control method for high electric speed brushless DC motor
  • A sensorless control method for high electric speed brushless DC motor

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Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] see Figure 1-7 , the present invention provides a technical solution: a method for controlling a high-speed brushless DC motor without a position sensor, including the starting and running of the motor. The starting and running of the motor are respectively: motor positioning, motor starting, low-speed running, High-speed operation; during the operation of the motor, the motor positioning and start-up process runs once, and the low-speed and high-speed...

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Abstract

The invention discloses a position sensorless control method for a brushless direct current motor with high electric speed, which includes the starting and running of the motor. Among them, the motor positioning and starting process runs once, and the low-speed and high-speed processes are repeatedly run according to the speed setting. The overall control method of the present invention is simple, saves energy consumption, greatly improves the working efficiency of the motor, and is worth popularizing.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a position sensorless control method for a brushless DC motor with high electrical speed. Background technique [0002] With the development of semiconductor technology and motor control technology, brushless DC motors have become more and more widely used due to their advantages such as high efficiency, high torque and long life. At the same time, the brushless DC motor must have the permanent magnet rotor position signal to be able to commutate correctly and operate reliably, so it puts forward higher requirements for the correct detection of the rotor position. The application of position sensorless control technology can avoid many problems of installing sensors, and can also be applied to some motor applications that are not suitable for installing position sensors. [0003] At present, the application of the sensorless control mode of the brushless DC motor is becomi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/182
Inventor 祁宏
Owner SUZHOU ZHIYING ELECTRONICS TECH