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Real-time correction method for commutation offset of brushless direct current motor

A brushed DC motor, real-time correction technology, applied in the direction of electronic commutation motor control, electrical components, control systems, etc., can solve the problems of complex methods, difficult to implement, poor real-time performance, etc., to achieve high detection accuracy and low degree of dependence.

Active Publication Date: 2017-05-31
BEIJING MECHANICAL EQUIP INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a real-time correction method for the commutation deviation of brushless DC motors, which solves the problems that the correction of commutation deviations in the control of brushless DC motors is complicated, has poor real-time performance, and is not easy to implement.

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  • Real-time correction method for commutation offset of brushless direct current motor

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Embodiment Construction

[0024] The specific steps of a real-time correction method for commutation deviation of a brushless DC motor are as follows:

[0025] The first step is to build a real-time correction system for brushless DC motor commutation deviation

[0026] A brushless DC motor commutation deviation real-time correction system, including: back EMF detection and filtering circuit 1, isolation amplifier circuit 2, zero point capture circuit 3, position detection circuit 4, power main circuit 5 and DSP controller 6. Back EMF detection and filter circuit 1 includes: resistor R 1 , resistance R 2 , capacitance C 1 . The power main circuit 5 includes: a driver chip 7, six power components VT1, VT2, VT3, VT4, VT5, VT6, and each power component has three terminals D, G and S.

[0027] The input end of the back EMF detection and filter circuit 1 is connected to the motor terminal A and the motor neutral line N, and the motor terminal A is connected to the resistor R 1 Connected at one end, the...

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Abstract

The invention discloses a real-time correction method for commutation offset of a brushless direct current motor. The method comprises the steps of building a brushless direct current motor commutation offset real-time correction system; determining a high-frequency pulse position signal [theta]A'S; judging a zero position of a magnetic pole of a motor rotor by using a DSP controller (6); determining a rotation speed and a commutation relay angle of the motor by using the DSP controller (6); determining a real-time position [theta]r of the rotor and outputting a motor commutation signal according to the rotation direction of the motor by using the DSP controller (6); and achieving commutation correction of the brushless direct current motor. The method provided by the invention has low dependency on a motor mathematical mode and an electrical parameter, and high detection accuracy, can change frequency of the high-frequency pulse position signal [theta]A'S on the line according to a n accuracy requirement, and is simple and easy to implement.

Description

technical field [0001] The invention relates to a method for real-time correction of commutation deviation, in particular to a method for real-time correction of commutation deviation of a brushless DC motor. Background technique [0002] Brushless DC motors have the advantages of small rotor inertia, high power density, high efficiency, small size, and brushless, and have superior performance compared to DC motors. They are widely used in high-performance motion control fields such as robots and CNC machine tools. With the rapid development of control theory and power electronic devices, the application of brushless DC motors has become more and more extensive, and the control performance of brushless DC motors depends critically on the accuracy and reliability of motor commutation. [0003] The existing real-time correction method for the commutation deviation of brushless DC motors needs to be realized by measuring electrical parameters such as voltage, current, and speed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/182
CPCH02P6/182
Inventor 崔臣君李建冬王利张文波
Owner BEIJING MECHANICAL EQUIP INST