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Brushless direct-current motor boost integrated driving system and control method

A brushed DC motor, integrated drive technology, applied in the direction of a single motor speed/torque control, motors, electric vehicles, etc., can solve problems such as the increase in the number of power devices and the difficulty of cost control.

Active Publication Date: 2020-12-29
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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  • Brushless direct-current motor boost integrated driving system and control method
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  • Brushless direct-current motor boost integrated driving 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 direct-current motor boost integrated driving system and a control method. A pre-stage Boost DC-DC converter topology circuit is formed through the coupling use ofswitching devices, and a voltage regulation effect on an input source is realized; meanwhile, a rear-stage three-phase full-bridge power converter topology circuit is formed, the output voltage adjusted by the front-stage Boost DC-DC converter serves as an input source of the rear-stage three-phase full-bridge power converter topology circuit to supply power to a brushless direct-current motor todrive, and the effect of motor speed regulation is achieved; the integrated topology is realized on a hardware circuit, an integrated control mode is realized on a system control method, and the integrated topology is simple in circuit, small in size, high in adaptability to input source battery voltage, suitable for being applied to the field of pure electric vehicles, capable of driving an electric vehicle to run and collecting braking energy under the condition that the electric vehicle brakes, the energy is saved, and the running distance of the electric vehicle is increased.

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 Applications(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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