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Rotor positioning method, positioning device and control system of brushless DC motor

一种刷直流电机、定位方法的技术，应用在控制系统、电动机控制、电子换向电动机控制等方向，达到解决定位错误问题、解决异响和抖动、实现全360°无盲区定位的效果

Active Publication Date: 2020-04-10
JIANGSU MIDEA CLEANING APPLIANCES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, the first purpose of the present invention is to propose a rotor positioning method for a brushless DC motor, which can not only greatly reduce the time for starting and positioning the motor, but also ensure that the motor will not reverse when starting, and solve the problem of abnormal noise and vibration during positioning. Jitter can also solve the positioning error problem caused by the mismatch between the current waveform and the rotor position during pulse positioning, simplifies the pulse positioning rotor position identification method, and can realize full 360° no blind zone positioning

Method used

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  • Rotor positioning method, positioning device and control system of brushless DC motor
  • Rotor positioning method, positioning device and control system of brushless DC motor
  • Rotor positioning method, positioning device and control system of brushless DC motor

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Embodiment Construction

[0044] 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.

[0045] A rotor positioning method for a brushless DC motor, a non-transitory computer-readable storage medium, a rotor positioning device for a brushless DC motor, and a control system for a brushless DC motor according to embodiments of the present invention will be described below with reference to the accompanying drawings.

[0046] Usually, the stator core of the brushless DC motor is wound with a current-carrying coil. When the current-carrying coil is passed into the current, a certain magnetic flux will be generated in the ...

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Abstract

The invention discloses a rotor positioning method, a positioning device and a control system of a brushless direct current motor, wherein the positioning method includes the following steps: when conducting conduction control on the stator winding of the motor according to a preset conduction mode, the Apply a voltage detection pulse for the first preset time to different phases of the stator winding, and obtain multiple current values ​​by obtaining the current value of the stator winding in each phase; obtain the preset current-sector relationship according to the preset conduction mode table; obtain the sector where the rotor of the motor is located according to multiple current values ​​and a preset current-sector relationship table, and obtain the rotor position of the motor according to the sector where the rotor of the motor is located. As a result, the rotor position of the motor can be acquired quickly and accurately, and problems such as abnormal noise, vibration and positioning errors will not occur, and the method is simple and can realize positioning without blind spots.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a rotor positioning method of a brushless direct current motor, a rotor positioning device of a brushless direct current motor and a control system of a brushless direct current motor. Background technique [0002] At present, in the field of brushless DC motor sensorless drive control technology, there are mainly two rotor positioning technologies when the motor is stationary and close to zero speed: forced pre-positioning method and pulse positioning method. [0003] Among them, the forced pre-positioning method does not consider the current position of the motor rotor, but energizes the fixed phase of the motor stator winding to make the motor rotor rotate to a predetermined position. However, this method has the following disadvantages: 1) The positioning time is long, which is not suitable for the occasion where the motor is required to start quickly; 2) In order to re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/185H02P6/22
CPCH02P6/185H02P2203/03H02P6/20
Inventor 王浩东万德康吴偏偏
Owner JIANGSU MIDEA CLEANING APPLIANCES
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