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High-voltage direct-current power distribution unit and control method thereof

A high-voltage DC and power distribution device technology, applied in the direction of conversion equipment with intermediate conversion to AC, can solve the problems of contactor arc extinguishing, burning power distribution switches, etc., to achieve the effect of improving working life and improving reliability

Inactive Publication Date: 2014-02-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004] The purpose of the present invention is to propose a new type of high-voltage DC power distribution device and its control method for the defects existing in the existing DC power distribution device, which effectively solves the problem of arc extinguishing of contactors in the high-voltage DC power distribution system and the connection capacitive The problem of burning the distribution switch when the load is on

Method used

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  • High-voltage direct-current power distribution unit and control method thereof
  • High-voltage direct-current power distribution unit and control method thereof
  • High-voltage direct-current power distribution unit and control method thereof

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Embodiment Construction

[0025] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:

[0026] The circuit of the present invention such as Figure 4 As shown, the high-voltage DC power distribution device includes a DC power supply V DC And load, also includes electromechanical hybrid switch unit A, pre-charging unit B and discharge freewheeling circuit unit C. Electromechanical hybrid switch unit A and pre-charging unit B are connected in parallel and then connected in series between the positive output terminal of the DC power supply and the positive input terminal of the load, the discharge freewheeling circuit unit C is connected in parallel with the load, and the negative input terminal of the load is connected to the DC power supply The negative output terminal of the power supply is then grounded.

[0027] Among them, the electromechanical hybrid switch unit A is composed of a contactor T and an insulated gate bipolar transistor K 1 Compos...

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Abstract

The invention discloses a high-voltage direct-current power distribution unit and a control method of the high-voltage direct-current power distribution unit. The high-voltage direct-current power distribution unit comprises a electromechanical hybrid type switch unit A, a pre-charging unit B and a discharging follow current loop unit C. The switch unit A comprises a contactor T and an insulated gate bipolar transistor K1. The pre-charging unit B comprises a power resistor R2 and a charging switch K2. The discharging follow current loop unit C comprises a power resistor R3, a discharging switch K3 and a freewheel diode D. According to the high-voltage direct-current power distribution unit, the problems that in a high-voltage direct-current power distribution system, a contactor is prone to being burned down, an impulse current occurs at the moment when a large capacitor is connected, residual releasing of a load capacitor occurs when the capacitor is disconnected and defects exist when a power distribution unit is compatible with different load capacitors are solved.

Description

technical field [0001] The invention relates to the technical fields of power electronics and electric engineering, in particular to a circuit structure of a high-voltage direct-current power distribution device and a control method thereof. Background technique [0002] With the increasing dependence of vehicles on electrical systems, especially the emergence of pure electric vehicles, the capacity of vehicle power distribution systems continues to increase. Due to the large current of low-voltage DC power distribution, the diameter and weight of distribution cables are large. In order to reduce the diameter and weight of vehicle power distribution cables, the DC power distribution voltage in vehicles continues to increase. With the increase of distribution voltage, the problem is that when the contactor cuts off the load, it is difficult to extinguish the arc or even the arc cannot be extinguished, which leads to the sintering of the contacts of the contactor and the burn...

Claims

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Application Information

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IPC IPC(8): H02M3/44
Inventor 王莉欧世锋
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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