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A high-power high-voltage dcdc converter for trolleybus

A trolleybus, high-power technology, applied in output power conversion devices, high-efficiency power electronic conversion, DC power input conversion to DC power output, etc. Reduced losses, low switching losses, and improved efficiency

Active Publication Date: 2019-08-30
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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  • A high-power high-voltage dcdc converter for trolleybus
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  • A high-power high-voltage dcdc converter for trolleybus

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Embodiment Construction

[0032] The specific implementation method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] 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.

[0034] like 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.

[0035] The controllable switch used in this embodiment is not only a thyristor switch, it is adjusted according to di...

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Abstract

The invention discloses a high-power high-voltage DC-DC converter for trolleybuses, belonging to the field of electric vehicles; comprising: inductance, capacitance, controllable switches, transformers, rectifier diodes, freewheeling diodes, surge suppression circuits and current acquisition modules , Voltage acquisition module and controller. After the DCDC converter is connected to the external DC grid, it passes through the surge suppression module, and then connects to the transformer through the ZVS half-wave quasi-resonant full-bridge inverter module composed of capacitors, diodes, and controllable switches; the transformer is connected to the full bridge after the series resonant capacitor Type rectification circuit, the output inductance, capacitance and load are connected through the resonant capacitor and the freewheeling diode, the controller adjusts the pulse width of the PWM signal with the collected voltage and current value, and is used to drive the conduction and closure of each controllable switch, soft switching The switching loss is reduced, and the selected components are suitable for the high-voltage and high-power environment of the dual-source trolleybus. The added resonant module realizes the energy transmission when all the switches are turned 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 Patents(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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