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Rotor positioning method and device for brushless DC motors and control system

A technology of brush DC motor and positioning method, which is applied in the direction of control system, motor control, electronic commutation motor control, etc., to achieve the effect of reducing the time of starting positioning, simplifying the rotor position identification method, and solving the problem of positioning error

Active Publication Date: 2020-02-04
JIANGSU MIDEA CLEANING APPLIANCES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • Rotor positioning method and device for brushless DC motors and control system
  • Rotor positioning method and device for brushless DC motors and control system
  • Rotor positioning method and device for brushless DC motors and control system

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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 and device for brushless DC motors and a control system. The positioning method comprises the following steps of applying a first preset time of voltage detection pulse to different phases of a stator winding of a motor in sequence when conduction control is carried out on the stator winding of the motor according to a preset conduction manner, and obtaining a plurality of current values through obtaining the current value, at each phase, of the stator winding; obtaining a preset current-sector relationship table according to the preset conduction manner; and obtaining a sector where a rotor of the motor is located according to the plurality of current value and the preset current-sector relationship table, and obtaining the rotor positionof the motor according to the sector where the rotor of the motor is located. Therefore, the rotor position of the motor can be rapidly and correctly obtained without the problems of abnormal sounds,shakes and positioning errors, and the method is simple and is capable of realize non-blind area positioning.

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 Applications(China)
IPC IPC(8): H02P6/185H02P6/20
CPCH02P6/185H02P2203/03H02P6/20
Inventor 王浩东万德康吴偏偏
Owner JIANGSU MIDEA CLEANING APPLIANCES
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