A brushless DC motor boost integrated drive system and control method

A brushed DC motor and integrated drive technology, which is applied in the direction of single motor speed/torque control, motor, control drive, etc., can solve the problems of increasing the number of power devices and difficult control of cost, so as to reduce switching loss and realize integration Effect of control, effect of reducing the number of driving channels

Active Publication Date: 2022-03-11
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Using DC-DC converters to cascade three-phase full-bridge power converters to control brushless DC motors, due to the increase in the number of bridge arms, the number of power devices will increase in pairs, and the cost is not easy to control

Method used

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  • A brushless DC motor boost integrated drive system and control method
  • A brushless DC motor boost integrated drive system and control method
  • A brushless DC motor boost integrated drive system and control method

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Embodiment Construction

[0041] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0042] The present invention designs a brushless DC motor boost integrated drive system, such as figure 1 shown, including power supply U 1 , the first electrolytic capacitor C 1 , the second electrolytic capacitor C 2 , inductance L, first MOS switch tube K 1 , the first diode D 1 , the second MOS switch tube K 2 , the second diode D 2 , the third MOS switch tube K 3 , the third diode D 3 , the fourth MOS switch tube K 4 , the fourth diode D 4 , the fifth MOS switch tube K 5 , the fifth diode D 5 , the sixth MOS switch tube K 6 , the sixth diode D 6 , the seventh MOS switch tube K 7 , the seventh diode D 7 , and A-phase windings, B-phase windings, and C-phase windings in a three-phase motor.

[0043] Among them, the first MOS switch tube K 1 source of the first diode D 1 The anode of the butt joint, th...

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Abstract

The invention relates to a brushless DC motor boost integrated drive system and a control method. By coupling and using switching devices, a front-stage Boost DC-DC converter topology circuit is formed to realize the voltage regulation effect on an input source; at the same time, a rear-stage is composed Three-phase full-bridge power converter topology circuit, the output voltage regulated by the front-stage Boost DC-DC converter is used as the input source of the rear-stage three-phase full-bridge power converter topology circuit, and supplies power to the brushless DC motor drive to achieve motor regulation. speed effect; the present invention not only realizes the integrated topology on the hardware circuit, but also realizes the integrated control mode on the system control method. In the field of electric vehicles, it can not only drive the electric vehicle to run, but also collect the braking energy when the electric vehicle brakes, save energy and increase the driving distance of the electric vehicle.

Description

technical field [0001] The invention relates to a brushless DC motor step-up integrated drive system and a control method, belonging to the technical field of motor drive control. Background technique [0002] Brushless DC motor is a kind of permanent magnet synchronous motor, which has the advantages of no brush, low interference, low operating noise, smooth operation, long life and low maintenance cost. The traditional brushless DC motor speed control circuit mainly uses a three-phase full-bridge power converter. The research on the power converter circuit will help to improve the circuit drive control method and integrate the motor drive system. The three-phase full-bridge power converter uses two diodes and two switch tubes for each bridge arm. The three-phase full-bridge power converter drive circuit of the brushless DC motor, when the motor brakes, the feedback energy is not conducive to recovery and collection, and the energy use efficiency is poor. As a kind of ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/08H02M3/158B60L15/00B60L15/20
CPCH02P6/08H02M3/158B60L15/007B60L15/2009H02M1/0054Y02T10/64Y02T10/72
Inventor 蔡骏马二昆庞浩张菀
Owner NANJING UNIV OF INFORMATION SCI & TECH
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