Control method and control device of high-speed brushless direct current motor

A brushed DC motor and control method technology, applied in the direction of electronic commutation motor control, control system, electrical components, etc., can solve the problems of high cost, complex hardware circuit, large sensor volume, etc., to achieve increased amplitude and easy detection. Effect

Pending Publication Date: 2022-01-28
JIANGSU UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of traditional brushless DC motor sensors such as large volume, high cost, and complicated hardware circuit, the present inven

Method used

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  • Control method and control device of high-speed brushless direct current motor
  • Control method and control device of high-speed brushless direct current motor
  • Control method and control device of high-speed brushless direct current motor

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Embodiment Construction

[0028] Embodiments of the present invention will be disclosed in the following diagrams. For the sake of clarity, many practical details will be described together in the following description. It should be understood, however, that these practical details should not be used to limit the invention. That is, in some embodiments of the invention, these practical details are not necessary.

[0029] Such as figure 1 As shown, the flow chart of a high-speed brushless DC motor control method is proposed for the present invention, and the specific design includes:

[0030] Step S1: Obtain the line voltage signal u of the brushless DC motor AB ;

[0031] Step S2: Obtain quasi-commutation signal H from the commutation signal extraction circuit AB ";

[0032] Step S3: The commutation signal extraction circuit in the step S2 reasonably designs the parameters of its resistance and capacitance according to the observed waveform diagram of the quasi-commutation signal, so as to filter ...

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Abstract

The invention relates to a control method and a control device of a high-speed brushless direct current motor. The control method comprises the following steps: acquiring a line voltage signal uAB of the brushless direct current motor; obtaining a quasi-commutation signal HAB'' from a commutation signal extraction circuit; calculating a phase angle deviation psi according to a phase angle deviation compensation calculation formula; and finally, according to the obtained quasi-commutation signal HAB'' and the calculated phase angle deviation psi, respectively performing phase angle compensation and time delay on the falling edge and the rising edge of the quasi-commutation signal to obtain an actual commutation point. The control device comprises a commutation signal extraction circuit module, a phase angle deviation calculation module and a phase angle compensation module. A position-free commutation signal of the motor is obtained through a line voltage signal, a complex software algorithm is not needed, and the method is simple and easy to implement.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a control method and a control device for detecting a back EMF zero-crossing point of a high-speed brushless DC motor. Background technique [0002] The brushless DC motor based on electronic commutation instead of mechanical commutation has the advantages of high reliability and high efficiency, and has been widely used in many fields. The traditional brushless DC motor uses the rotor position sensor to sense the position information of the rotor, and finally controls the rotation of the motor through commutation logic, driving power tubes, etc. However, the introduction of the position sensor increases the size, cost and installation difficulty of the motor, and its accuracy will also be affected in high temperature and high humidity environments, so the research on position sensorless control technology is very important. [0003] To solve this problem, the position sen...

Claims

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Application Information

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IPC IPC(8): H02P6/182
CPCH02P6/182
Inventor 魏海峰刘文建陈椒娇
Owner JIANGSU UNIV OF SCI & TECH
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