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Dust collector and control method, device and system of brushless direct current motor

A technology of brush DC motor and control method, which is applied to the control device of brushless DC motor, the control system of brushless DC motor, and the field of vacuum cleaners, to achieve fast and accurate positioning, solve abnormal noise and jitter, and simplify the rotor position identification method.

Active Publication Date: 2020-10-27
JIANGSU MIDEA CLEANING APPLIANCES +1
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  • 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 control 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 abnormal noise and vibration during positioning , it 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° positioning without blind spots, and in extreme abnormal conditions, it can still be Fast and accurate positioning of the motor's rotor

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  • Dust collector and control method, device and system of brushless direct current motor
  • Dust collector and control method, device and system of brushless direct current motor
  • Dust collector and control method, device and system of brushless direct current motor

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Embodiment Construction

[0040] 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.

[0041] The control method of the brushless DC motor, the control device of the brushless DC motor, the control system of the brushless DC motor and the vacuum cleaner according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0042] 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 stator core. If there is an external ma...

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Abstract

The invention discloses a dust collector and a control method, device and system of a brushless direct current motor. The control method comprises the steps of in a rotor positioning stage, obtainingthe rotor position of the motor through a pulse injection method; and judging whether the pulse injection method is successful or not according to the rotor position of the motor, if not, controllingthe rotor of the motor to rotate to a preset position by adopting a forced pre-positioning method, and if so, ending. Therefore, the position of the rotor of the motor can be quickly and accurately obtained, the problems of abnormal sound, shaking and positioning errors are avoided, the method is simple, blind-area-free positioning can be realized, and meanwhile, the rotor of the motor can still be quickly and accurately positioned under an extremely abnormal condition.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a control method of a brushless direct current motor, a control device of a brushless direct current motor, a control system of a brushless direct current motor and a vacuum cleaner. 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 redu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/18
CPCH02P6/18
Inventor 万德康吴偏偏王浩东
Owner JIANGSU MIDEA CLEANING APPLIANCES
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