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Trapezoidal wave back electromotive force brushless direct current motor commutation error compensation method

A technology of brushed DC motor and counter electromotive force, applied in the direction of electronic commutator, monitoring commutation, control purpose model/simulation, etc., to achieve the effect of reducing the number of times, optimizing the width of the hysteresis loop, and increasing the compensation speed

Inactive Publication Date: 2021-01-15
BEIHANG UNIV
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Problems solved by technology

[0005] Aiming at the commutation error problem caused by non-ideal factors in the operation process of the brushless DC motor, the invention discloses a method for compensating the phase commutation error of the brushless DC motor with trapezoidal wave back electromotive force

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  • Trapezoidal wave back electromotive force brushless direct current motor commutation error compensation method
  • Trapezoidal wave back electromotive force brushless direct current motor commutation error compensation method
  • Trapezoidal wave back electromotive force brushless direct current motor commutation error compensation method

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Embodiment Construction

[0028] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] figure 1 It is a flow chart of the commutation error compensation method for the brushless DC motor of the trapezoidal wave back electromotive force of the present invention. From figure 1 It can be seen from the figure that the brushless DC motor commutation error compensation method of the present invention includes two steps. First, the initial estimated value of the commutation error is obtained based on the mathematical model of the brushless DC motor, and then online scrolling is performed based on the difference of the phase current integral. Optimize to obtain the best commutation error, and perform hysteresis control after the online rolling optimization ends. At the same time, according to the motor speed and load changes, the hysteresis band width is updated in real time to overcome the influence of uncertainty on...

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Abstract

The invention discloses a trapezoidal wave back electromotive force brushless direct current motor commutation error compensation method and belongs to the technical field of brushless direct currentmotor control. The brushless direct current motor commutation error compensation method comprises the following two steps of firstly, obtaining a primary estimation value of a commutation error basedon a mathematical model of the brushless direct current motor so as to improve the compensation speed of the commutation error; and performing online rolling optimization based on the difference valueof the phase current integration to obtain an optimal commutation error, and performing hysteresis control after the online rolling optimization is finished. Meanwhile, in order to adapt to the change of the rotating speed and the load of the motor, selection of the width of the hysteresis band is optimized to overcome the influence of uncertainty on hysteresis control. The trapezoidal wave backelectromotive force brushless direct current motor commutation error compensation method has the advantages of high compensation speed, high compensation precision, insensitivity to changes of motor rotating speed, load and the like and the like, and is beneficial to improving commutation precision and operation efficiency of the brushless direct current motor.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a method for compensating phase commutation errors of a brushless DC motor with a trapezoidal wave counter electromotive force. Background technique [0002] The brushless DC motor driven by square wave current has the advantages of simple structure, high power density and high efficiency, and is widely used in machinery manufacturing, vehicle transportation, home appliances and other fields. A BLDC motor requires six discrete rotor position signals for commutation to control the stator magnetic field in synchronization with the rotor magnetic field. According to the detection method of the rotor position, the control of the brushless DC motor can be divided into position sensor control and position sensorless control. Because the position sensor will occupy the installation space, increase the cost of the motor, and reduce the reliability of the system, the position sensorless cont...

Claims

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Application Information

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IPC IPC(8): H02P6/14H02P6/34H02P6/12
CPCH02P6/12H02P6/14H02P6/34
Inventor 郑世强李飏张海峰宋欣达周新秀
Owner BEIHANG UNIV
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