Motor drive system and energy feedback brake control method of motor drive system

A technology of motor drive system and braking control, which is applied in the direction of electronic commutation motor control, electric vehicles, control systems, etc., can solve the problem of small driving range of the battery, and achieve the effect of improving driving range and prolonging the use time

Active Publication Date: 2013-02-27
SUZHOU INOSA UNITED POWER SYST CO LTD
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AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a motor drive system and its energy feedbac

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  • Motor drive system and energy feedback brake control method of motor drive system
  • Motor drive system and energy feedback brake control method of motor drive system
  • Motor drive system and energy feedback brake control method of motor drive system

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] Because electric vehicles or motorcycles will brake frequently during driving, according to the principle of reversibility of DC motors, this paper proposes a motor drive system based on permanent magnet brushless DC motors and its energy feedback braking control method. This technology can not only charge the feedback current generated during braking into the battery for driving the motor, thereby improving the driving range, but at the same time, for the sake of safe driving, the system and method can further improve the energy feedback process. Do special treatment to prevent battery overcharging from causing harm to the safety of people and vehicles.

[0029] see figure 1 , is a block diagram of a preferred embodiment of the motor dr...

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Abstract

The invention relates to a motor drive system and an energy feedback brake control method of the motor drive system. The motor drive system comprises a storage battery, a motor controller and a permanent magnet brushless direct current motor. The motor controller comprises a control module and a triphase full-bridge inversion circuit, wherein the control module comprises an electric control unit and a brake control unit; the brake control unit is used for confirming a first upper half bridge switch tube and a second lower half bridge switch tube turned on by a wave transmission sequence corresponding to a position signal of the current rotor in the electric control process when brake is conducted, and sending a PWM (pulse-width modulation) signal to control the on and off of the first lower half bridge switch tube corresponding to a branch where the first upper half bridge switch tube is located, so that a return circuit is formed to generate brake current in a motor coil, and the storage battery is charged. According to the system and the method, half bridge modulation energy feedback can be conducted according to a reversibility principle of the motor in the brake process of the permanent magnet brushless direct current motor, and the service time of the storage battery can be prolonged.

Description

technical field [0001] The invention relates to the technical field of motors, and more specifically, to a motor drive system and an energy feedback braking control method thereof. Background technique [0002] With the development of the economy, vehicles such as automobiles and motorcycles have become one of the indispensable means of transportation in human life. Traditional fuel vehicles or motorcycles use internal combustion engines as their driving power source. However, with the increasing shortage of global oil energy and environmental pollution, it is inevitable to seek new energy as a power source for motorcycles. Electric cars or motorcycles have the advantages of no pollution, no noise, energy saving, etc., and have increasingly become popular means of transportation. [0003] Different from traditional internal combustion engines, electric vehicles or motorcycles use electric motors as their driving power sources, while permanent magnet brushless DC motors (BLD...

Claims

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Application Information

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IPC IPC(8): H02P6/00H02P6/24H02J7/14
CPCY02T10/92
Inventor 谢亮
Owner SUZHOU INOSA UNITED POWER SYST CO LTD
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