Automotive brush-less motor and control method thereof

A brushless motor and control method technology, applied in the direction of electronic commutation motor control, control system, electrical components, etc., can solve the problems of the motor being unable to work, uneconomical, and self-important, and achieve the effect of reducing installation man-hours and saving costs.

Inactive Publication Date: 2018-02-13
HIGER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] (1) The purchase price of the resolver is expensive, and its weight is relatively large. It is not cost-effective under the current situation that the national new energy pol

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  • Automotive brush-less motor and control method thereof
  • Automotive brush-less motor and control method thereof
  • Automotive brush-less motor and control method thereof

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Embodiment Construction

[0054] The present invention will be described in detail below in conjunction with the implementations shown in the drawings, but it should be noted that these implementations are not limitations of the present invention, and those of ordinary skill in the art based on the functions, methods, or structural changes made by these implementations Equivalent transformations or substitutions all fall within the protection scope of the present invention.

[0055] The key to determining the moment of commutation of the motor windings or the appropriate time to switch from one zone to another is the rotor position, and when to commutate is only related to the rotor position. If the control with sensors is used, it is relatively simple and the position of the rotor can be obtained immediately. In sensorless control, other methods must be used to determine the rotor position, that is, the present invention analyzes the back electromotive force (EMF) of the motor to determine the positio...

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Abstract

The invention provides an automotive brush-less motor and a control method thereof. The control method of the automotive brush-less motor comprises the following steps of S1, energizing an A-phase coil and a B-phase coil of the brush-less motor; S2, continuously monitoring an induced electromotive force of a C-phase coil; and S3, when the induced electromotive force of the C-phase coil is lower than the voltage of the center point of a star connection relation, carrying out commutation on the brush-less motor after the same time period, wherein the time period is the time from coil energization to a situation that the induced electromotive force of the C-phase coil islower than the voltage of the center point. The automotive brush-less motor and the control method thereof eliminate rotarytransformers or similar Hall sensor components in a conventional brush-less motor, control the start-up and speed regulation of the brush-less motor by monitoring the induced electromotive force of athird phase, and have the advantages of saving cost and installation man-hour, reducing fault sources and saving arrangement space of a whole automobile.

Description

technical field [0001] The invention relates to the technical field of brushless motors for vehicles, in particular to a commutation control method suitable for brushless motors adopting star-shaped connection of stator windings and a corresponding brushless motor for vehicles. Background technique [0002] At present, all brushless motors used in new energy vehicles use resolvers (electromagnetic sensors) to determine the position of the motor rotor relative to the motor stator to commutate the motor windings, which has the advantage of simple control. However, the above commutation control method has the following disadvantages: [0003] (1) The resolver is expensive to purchase and has a heavy weight. It is not cost-effective under the current situation that the national new energy policy subsidy is declining and the subsidy is linked to the mileage. [0004] (2) The resolver adds a potential failure factor to the motor, and if the resolver fails, the motor cannot work. ...

Claims

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Application Information

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IPC IPC(8): H02P6/182
CPCH02P6/182
Inventor 葛红亮赵杰鞠杜虎谭福伦程方斌邱远红
Owner HIGER
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