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High-power high-voltage DC-DC converter applied to trolleybus

A trolley bus, high-power technology, applied in the direction of output power conversion device, high-efficiency power electronic conversion, DC power input conversion to DC power output, etc., can solve the problems of low switching frequency, a large number of IGBT devices, and increase costs, and achieve Reduced loss, low switching loss, and improved efficiency

Active Publication Date: 2017-11-21
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When traditional DCDC converters are used in high-voltage DC grids, they cannot meet the voltage requirements and require a large number of IGBT devices, which increases the cost and the switching frequency of this topology is lower than others

Method used

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  • High-power high-voltage DC-DC converter applied to trolleybus
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  • High-power high-voltage DC-DC converter applied to trolleybus

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Embodiment Construction

[0031] The specific implementation method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] The present invention is a circuit topology of a high-power high-voltage DCDC converter for trolleybuses, which is mainly used in high-voltage and high-power occasions of trolleybuses. Considering the cost and use conditions, the thyristor is selected as the inverter switch in the circuit For the device, in the configuration of this topology, after considering the influence of the frequency of use, a resonant module is added.

[0033] Such as figure 1 As shown, the high-power high-voltage DCDC converter includes: inductors, capacitors, thyristor switches, transformers, rectifier diodes, freewheeling diodes, surge suppression circuits, current acquisition modules, voltage acquisition modules and controllers.

[0034] The controllable switch used in this embodiment is not only a thyristor switch, it is adjusted according to...

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Abstract

The invention discloses a high-power high-voltage DC-DC converter applied to a trolleybus, and belongs to the field of electrical vehicles. The converter comprises an inductor, capacitors, controllable switches, a transformer, rectifier diodes, a freewheel diode, a surge suppression circuit, a current collection module, a voltage collection module and a controller. The DC-DC converter is connected with an external direct current grid, and then connected with the transformer via the surge suppression circuit and a ZVS half-wave quasi-resonant full bridge inverter module composed of the capacitors, the diodes and the controllable switches; the transformer is connected with a full bridge rectifier circuit after being connected with a resonant capacitor in series, and connected with an output inductor, the capacitor and a load via the resonant capacitor and the freewheel diode; the controller adjusts collected voltage and current values to be pulse width of a PWM signal, used for driving each controllable switch to switch on and off; switch losses are reduced via soft switching; the component is applicable to double-source trolleybus high-voltage high-power environment; and energy transmission is kept due to the addition of the resonant module under the condition that all the switches are switched off.

Description

technical field [0001] The invention belongs to the field of electric vehicles, and in particular relates to a high-power high-voltage DC-DC converter for trolley buses. Background technique [0002] With the attenuation of traditional energy sources, electric energy is gradually being valued, and it has been used on a large scale in my country's high-voltage DC power grid. Unlike ordinary new energy vehicles, trolleybuses can directly draw electricity from the line network through collector poles. High-voltage direct current transmission technology not only realizes large-scale and long-distance transmission of electric energy, but also has high transmission efficiency, which can provide stable electric energy supply for dual-source trolleybuses. The high-voltage DC power grid is an effective means to solve the long-distance transmission of large-capacity electric energy and the collection of large-scale renewable energy. The high-power high-voltage DC / DC converter is the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/315
CPCH02M3/3155Y02B70/10
Inventor 杨世春杨鹏余江闫啸宇杨海圣
Owner BEIHANG UNIV
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