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Method and apparatus for implementing a power converter input terminal voltage discharge circuit

An input terminal and circuit technology, applied in the direction of output power conversion device, conversion equipment without intermediate conversion to AC, electrical components, etc., can solve the problem of low cost of resistance discharge circuit

Active Publication Date: 2014-12-24
POWER INTEGRATIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Existing resistive discharge circuits of the type described above are low cost and durable, but continuously dissipate power in the resistor when an electrical source is connected to the input of the power system

Method used

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  • Method and apparatus for implementing a power converter input terminal voltage discharge circuit
  • Method and apparatus for implementing a power converter input terminal voltage discharge circuit
  • Method and apparatus for implementing a power converter input terminal voltage discharge circuit

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Embodiment Construction

[0074] Methods and apparatus are described for implementing a discharge circuit for discharging a capacitance present between input terminals of a power supply system when an electrical energy source is decoupled from the input terminals of the power supply system. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one of ordinary skill in the art that the specific details need not be employed to practice the present invention. In some instances, well-known materials or methods have not been described in detail so as not to obscure the present invention.

[0075] Reference throughout this specification to "one embodiment," "an embodiment," "an example," or "an example" means that a particular feature, structure, or characteristic described with respect to the embodiment or example is included in the present specification. In at least one embodiment of the...

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PUM

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Abstract

A circuit to discharge a capacitance between input terminals of a power system is disclosed. An example circuit includes a control circuit coupled to an input of a power system. The control circuit is coupled to detect whether an electrical energy source is coupled to an input of the power system. A switch is also included and is coupled to the control circuit and to the input of the power system. The control circuit is coupled to drive the switch in a first operating mode when the electrical energy source is coupled to the input of the power system. The control circuit is coupled to drive the switch in a second operating mode when the electrical energy source is uncoupled from the input of the power system. A capacitance coupled between input terminals of the input of the power system is discharged through the switch to a threshold voltage in less than a maximum period of time from when the electrical power source is uncoupled from the input terminals of the power system.

Description

[0001] This application is a divisional application of the invention patent application No. 201010245531.9 with the filing date of July 30, 2010, and entitled "Method and Device for Realizing the Voltage Discharging Circuit at the Input Terminal of a Power Converter". [0002] Background Information technical field [0003] The present invention generally relates to a circuit for discharging a capacitance present between input terminals of a power system when an electrical source is disconnected from the input terminals of the power system. More particularly, the present invention relates to a circuit for discharging an EMI filter capacitor coupled in parallel to an input of a power system when an AC voltage source is disconnected from the input of the power system. Background technique [0004] Power systems serve a variety of purposes and applications. Exemplary power systems include power converters, such as power supplies, in which the input and output power is electri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/07H02M1/44
CPCH02M1/126H02M1/32H02M1/36H02M1/322H02M1/12
Inventor B·巴拉克里什南D·龚R·K·奥尔D·M·H·马修斯
Owner POWER INTEGRATIONS INC