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Switching device and switching equipment

A switching device and switching unit technology, applied in the electrical field, can solve the problems of high cost and complex structure of the power supply system, and achieve the effect of reducing the complexity, overcoming the complex structure and high cost

Active Publication Date: 2013-10-23
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a switching device and a switching device to at least solve the technical problem in the prior art that the structure of the power supply system is complicated and the cost is high due to the need for voltage isolation to supply power to the switching device through an external power supply

Method used

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  • Switching device and switching equipment
  • Switching device and switching equipment
  • Switching device and switching equipment

Examples

Experimental program
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Embodiment 1

[0029] The embodiment of the present invention provides an optional switch device, such as figure 1 As shown, the device includes:

[0030] 1) a driving unit 102, configured to generate a first control signal;

[0031] 2) The switch unit 104 is configured to receive the first control signal, and switch between the on state and the off state according to the state of the first control signal;

[0032] 3) The energy feeding unit 106 is connected in parallel at both ends of the switching unit 104, and is used for charging by using the potential difference between the two ends of the switching unit 104 when the switching unit 104 is in the off state, and according to the charged energy feeding The terminal voltage of the unit supplies power to the driving unit.

[0033] As one of the technical effects achieved by the technical solution of the present invention, the switch device provided by the embodiment of the present invention, as the name implies, can control the on and off ...

Embodiment 2

[0107] The embodiment of the present invention provides an optional switchgear, such as Image 6 As shown, the equipment can include:

[0108] 1) A plurality of the above-mentioned switch devices 602 are connected in series to form one body.

[0109] Generally speaking, in the embodiment of the present invention, the first control signal received by the switch units 204 in the plurality of switch devices 602 can be used to synchronously control the on and off states of the switch units 104, so that The whole formed by connecting multiple switching devices 602 in series can be regarded as a switch capable of switching between on and off states.

[0110] Specifically, as an optional implementation, it can be combined with image 3 with Figure 4 The two preferred structures of the switch device 602 shown in FIG. 10 can realize the synchronization of the first control signal. For example, the driving module 302 can be used to receive the same or the same second control signal,...

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Abstract

The invention discloses a switching device and switching equipment. The switching device comprises a drive unit, a switching unit and an energy feedback unit, wherein the drive unit is used for generating a first control signal; the switching unit is coupled with the drive unit and used for switching a conduction state and an off state according to the first control signal; the energy feedback unit is connected to two ends of the switching unit in parallel and used for charging by utilizing the potential difference between two ends of the switching unit when the switching unit stays at the off state, and the drive unit is powered by an end voltage of the energy feedback unit after being charged. By adopting the switching device, the technical problems in the prior art such as complicated structure and high cost of a power supply system caused by the voltage isolation when an external power supplies power to the switching device can be solved, and through the design that the energy feedback unit acquires the energy from a main circuit and supplies the power, the technical effect for lowering the complexity and reducing the manufacturing cost of the switching system can be realized.

Description

technical field [0001] The invention relates to the electrical field, in particular to a switchgear and switchgear. Background technique [0002] As a semiconductor device with good switching characteristics, the insulated gate bipolar transistor IGBT (Insulated Gate Bipolar Transistor) has a very wide range of applications in the electrical field. However, in the case of high power and high voltage, as a line switch, the withstand voltage level of a single IGBT is usually difficult to meet the requirements. Although there are IGBTs with higher withstand voltage levels, they are expensive. Connecting several IGBTs with low withstand voltage levels in series can effectively solve the defect of a single IGBT with low withstand voltage levels, and the cost is low, which has attracted widespread attention. The key to the IGBT series technology is to ensure that each IGBT is consistent at the moment of turn-on and turn-off. There is another important difficulty in the process ...

Claims

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Application Information

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IPC IPC(8): H03K17/567
Inventor 江军马国明李成榕罗定平李庆民
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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