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A controllable regenerative braking system based on supercapacitor-energy-consuming resistor and its control method

A super capacitor, regenerative braking technology, applied in control systems, motor generator control, electric vehicles, etc., can solve problems such as motor failure to brake

Active Publication Date: 2021-10-01
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When V bus below the supercapacitor voltage V cap , the kinetic energy of the motor will no longer be converted into electric energy of the supercapacitor, and the motor will not be able to brake

Method used

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  • A controllable regenerative braking system based on supercapacitor-energy-consuming resistor and its control method
  • A controllable regenerative braking system based on supercapacitor-energy-consuming resistor and its control method
  • A controllable regenerative braking system based on supercapacitor-energy-consuming resistor and its control method

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Embodiment Construction

[0021] Such as figure 1 As shown, the controllable regenerative braking system based on the supercapacitor-energy-consuming resistor in this embodiment includes a composite control unit, a supercapacitor, and a energy-consuming resistor R er , lithium battery power supply circuit, super capacitor power supply / braking circuit, energy consumption resistance braking circuit and motor drive bridge S mo , motor drive axle S mo The AC side is connected to the motor, the DC side is connected to the positive and negative busbars, the lithium battery power supply circuit is connected to the positive and negative busbars, and the supercapacitor power supply / braking circuit includes a capacitor step-down bridge S ec and capacitor boost bridge S c , the supercapacitor in turn passes through the capacitor step-down bridge S ec , capacitor boost bridge S c Connected to the positive and negative bus bars, the energy consumption resistor braking circuit includes the energy consumption ste...

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Abstract

The invention discloses a controllable regenerative braking system and its control method based on a supercapacitor-energy-consuming resistor. Braking circuit, energy consumption resistance braking circuit and motor drive bridge, the DC side of the motor drive bridge is connected to the positive and negative bus bars, the lithium battery power supply circuit, the supercapacitor power supply / braking circuit, and the energy consumption resistance braking circuit are all connected to the positive and negative busbars. The negative busbar, the supercapacitor power supply / braking circuit includes a capacitor step-down bridge and a capacitor boost bridge, and the energy consumption resistance braking circuit includes a power consumption step-down bridge. The invention can control the motor speed and keep the braking torque constant during the regenerative braking process based on the supercapacitor, so that the supercapacitor can be better applied in the motor drive system, and the kinetic energy of the motor during braking can be stored as much as possible in the In the supercapacitor, when the motor braking mode is switched, it is bumpless switching.

Description

technical field [0001] The invention relates to a supercapacitor motor system regenerative braking technology, in particular to a controllable regenerative braking system based on a supercapacitor-energy-consuming resistor and a control method thereof. Background technique [0002] The control of the motor speed when the motor drive system recovers the kinetic energy to the supercapacitor deserves attention. If the motor drive system utilizes supercapacitor regenerative braking, the deceleration is very fast when the motor speed is high, this is due to the induced electromotive force V on the bus bus Proportional to motor speed. When V bus below the supercapacitor voltage V cap , the kinetic energy of the motor will no longer be converted into electric energy of the supercapacitor, and the motor will not be able to brake. This situation is not allowed in many motor drive applications, such as electric vehicles, elevators and so on. The energy consumption resistor can en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P3/18H02P3/22H02J7/34
CPCH02J7/345H02P3/18H02P3/22
Inventor 彭辉吴美平卢惠民肖军浩徐明曾志文
Owner NAT UNIV OF DEFENSE TECH
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