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Drive control method and system for brushless DC motor

A brushed DC motor and drive control technology, applied in the field of motors, can solve problems such as the inability to guarantee the motor out-of-step, and achieve the effects of ensuring out-of-step, improving operation reliability, and expanding the speed range

Active Publication Date: 2018-01-09
HAI YING GROUP OF AEROSPACE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, domestic research on high-speed △-connection sensorless brushless DC motors is still in its infancy, and the target speed in related technologies generally does not exceed 5000rpm, which cannot guarantee that the motor will not lose synchronization during operation. ,Room for improvement

Method used

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  • Drive control method and system for brushless DC motor
  • Drive control method and system for brushless DC motor
  • Drive control method and system for brushless DC motor

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Embodiment Construction

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0038] In the present invention, unless otherwise clearly specified...

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Abstract

The invention discloses driving control method and system for a brushless direct current motor. The method comprises the steps of obtaining a three-phase voltage balance equation according to the there-phase current and voltage of the brushless direct current motor; obtaining a position point with zero counter electromotive force voltage amplitude of any phase according to the three-phase voltage balance equation; calculating according to the position point to obtain a zero crossing point; detecting the difference of the voltage counter electromotive force of some phase and a three-phase voltage neutral point of hardware to obtain an accurate zero crossing point for determining the position of a rotor magnet; estimating the phase change time according to the position of the rotor magnet; controlling the brushless direct current motor through a driving circuit. According to the control method, counter electromotive force zero crossing point is obtained and used for determining the position of the rotor magnet so as to estimate the phase change time to achieve the drive control of the brushless direct current motor; in addition, the rotating speed range for loading speed regulating of the motor is expanded, the operation reliability of the motor is improved, and the motor can be avoided stepping out during running.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a drive control method and system for a brushless DC motor. Background technique [0002] Since the brushless DC motor under the position sensorless control mode has the advantages of high reliability and strong anti-interference ability, and can overcome the commutation torque fluctuation caused by the inaccurate installation of the position sensor to a certain extent, the position sensorless control technology It is one of the hotspots of brushless DC motor research. [0003] Specifically, the existence of the position sensor will easily lead to the increase of the motor system structure, which will increase the number of wires between the motor and the control system, and the sensitivity of the sensor will deteriorate when the sensor operates under harsh conditions such as high temperature, high pressure and high humidity, and the system will run reliably. reduced sex. Theref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/182
CPCH02P6/182H02P2203/09
Inventor 张琪王东杨建成杨聖魁詹晓丽赵健
Owner HAI YING GROUP OF AEROSPACE IND
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