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Control device and method for electric car driving and braking system

A technology for electric vehicles and braking systems, applied in electric braking systems, electric vehicles, control devices, etc., can solve problems such as battery impact, reduce battery life, etc., to prevent reverse charging, reduce energy output, and reduce consumption. Effect

Active Publication Date: 2017-09-01
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] So far, many electric vehicles are driven by a single battery. When the vehicle needs to accelerate or go uphill, the battery needs to be discharged with a large current, which will directly affect the battery and reduce the service life of the battery.

Method used

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  • Control device and method for electric car driving and braking system
  • Control device and method for electric car driving and braking system
  • Control device and method for electric car driving and braking system

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with accompanying drawing.

[0030] Such as figure 1 As shown, the device of the present invention includes: a motor controller, a three-phase motor, a diode, a rectifier circuit, a supercapacitor, a power battery, a thyristor trigger circuit, an inductor, and a relay KT. The supercapacitor is connected in parallel with the diode, and the power battery is connected in series with the diode and the supercapacitor. During the driving process, when the terminal voltage of the supercapacitor is greater than the voltage drop across the diode, the supercapacitor and the power battery drive the electric vehicle together. When the terminal voltage of the supercapacitor When it is less than the voltage drop across the diode, the electric vehicle is driven by the power battery alone. During the braking process, the three-phase power of the motor directly enters the rectifier bridge to be rectified and charged i...

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PUM

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Abstract

The invention discloses a control device and method for an electric car driving and braking system. The device comprises a motor controller, a three-phase motor, a diode, a rectifying circuit, a super capacitor, a power battery, a thyristor triggering circuit, an inductor and a relay. In driving, when the terminal voltage of the super capacitor is higher than the voltage between an audion base electrode and a collector electrode, the relay is switched on, and the super capacitor and the power battery together drive the motor to rotate; when the terminal voltage of the super capacitor is lower than the voltage between the audion base electrode and the collector electrode, the relay is switched off, and at this moment, only the power battery conducts separate drive; and in braking, three-phase power of the motor passes through the inductor and directly charges the super capacitor through the rectifying circuit which is composed of a thyristor and the diode. In driving, the device can reduce energy output of the power battery and prevent discharge of the super capacitor when the voltage is low, and in braking, by adoption of the rectifying circuit with the thyristor, consumption of recovered energy can be reduced.

Description

technical field [0001] The invention relates to the technical field of driving and regenerative braking control of pure electric vehicles, in particular to a composite power supply driving and braking of pure electric vehicles. Background technique [0002] With the increasingly serious energy crisis and environmental pollution, electric vehicles have received great attention from the industry and strong support from government departments due to their advantages of energy saving, environmental protection, and high energy conversion efficiency. Compared with traditional vehicles, pure electric vehicles have an absolute advantage, which can realize regenerative braking and recover part of the energy. [0003] So far, many electric vehicles are driven by a single battery. When the vehicle needs to accelerate or go uphill, the battery needs to be discharged with a large current, which will directly affect the battery and reduce the service life of the battery. Contents of the...

Claims

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Application Information

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IPC IPC(8): B60L7/14B60L7/16B60L11/18B60L15/20
CPCB60L7/14B60L7/16B60L15/20B60L15/2009B60L50/40B60L50/50B60L2240/42Y02T10/70Y02T10/72
Inventor 盘朝奉戴伟陈燎陈龙江浩斌徐兴孙登辉张厚忠
Owner JIANGSU UNIV
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