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Power switch device series circuit with overvoltage protection function

A power switching device, overvoltage protection technology, applied in the direction of output power conversion devices, electrical components, etc., can solve the problems of inability to detect the failure of the series circuit of the power switching device, inability to give an alarm in advance, etc. Pressure protection, the effect of avoiding damage

Inactive Publication Date: 2013-12-18
王成效 +1
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  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem solved by the present invention is: to construct a series circuit of power switching devices with overvoltage protection function, to overcome the technical problems in the current technology that the faults of the series circuit of power switching devices cannot be detected, and the defects that cannot be alarmed in advance

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  • Power switch device series circuit with overvoltage protection function
  • Power switch device series circuit with overvoltage protection function
  • Power switch device series circuit with overvoltage protection function

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Embodiment Construction

[0030] The technical solutions of the present invention will be further described below in combination with specific implementation methods.

[0031] The description in the specific embodiments of the present invention clearly and completely describes the technology of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, and it cannot be deemed that the present invention is limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, on the premise of not departing from the concept of the present invention, no novelty and creative technical improvements are made, and only some simple deduction or replacement are made, all of which belong to the protection of the present invention scope.

[0032] like image 3 Shown: The specific embodiment of the present invention is: build a kind of power switch device series circuit with overvoltage protection f...

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Abstract

The invention relates to a power switch device series circuit with an overvoltage protection function. The power switch device series circuit comprises a plurality of power switch device series branches composed of power switch devices from Q1 to Qn, a plurality of forward direction tank circuits K, a plurality of reverse direction tank circuits S and a voltage limiting detection circuit H. Each power switch device is provided with a forward direction tank circuit K and a reverse direction tank circuit S in a matched mode, through calculating a current detected by a current detector A, the voltage limiting detection circuit H can judge whether overvoltage exists in any power switch device which is in series connection for use or not, so that overvoltage protection is achieved, damage to the power switch devices is avoided, and running reliability of equipment and a system is greatly increased.

Description

technical field [0001] The invention relates to an overvoltage protection circuit in the power electronics industry, more specifically, to a circuit of power switching devices used in series, which is often used in high-voltage power conversion circuits. Background technique [0002] The series circuit of power switching devices modulated by PWM has great application prospects in the fields of high-voltage frequency converters, DC flexible power transmission, and power reactive power compensation. At present, the insulated gate bipolar transistor (IGBT) series bridge arm has been applied in 3KV and 10KV high-voltage inverters. [0003] Due to the low withstand voltage value of current power switching devices, such as the withstand voltage withstand value of insulated gate bipolar transistor (IGBT) is 1200V, 1700V, 3300V equivalent, in high-voltage circuits such as 10KV, 100KV and other circuits, it is necessary to count several power Switching devices work in series to solv...

Claims

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Application Information

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IPC IPC(8): H02M1/32
Inventor 王成效王达开
Owner 王成效
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