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Multi-channel interleaved PFC control system and method

A control system and control method technology, applied in the direction of high-efficiency power electronic conversion, output power conversion device, electrical components, etc., can solve the problems of IGBT function failure, permanent damage, etc., to prolong the service life, increase the service life, improve Overall Safety and Longevity Effects

Pending Publication Date: 2020-11-17
BEIJING INST OF TECH ZHUHAI CAMPUS
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to propose a multi-channel interleaved PFC control system and method to solve the problem that the IGBT of the existing PFC circuit is prone to functional failure or even permanent damage

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  • Multi-channel interleaved PFC control system and method
  • Multi-channel interleaved PFC control system and method
  • Multi-channel interleaved PFC control system and method

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Embodiment Construction

[0036] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings. Several embodiments of the invention are shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present invention will be thorough and complete.

[0037] Please refer to figure 1 and figure 2 , the first embodiment of the present invention provides a multi-channel interleaved PFC control system, including a microcontroller 10, a rectifier circuit 20, a load circuit 30 and a PFC circuit 40, the PFC circuit 40 includes three PFC branches, in the present invention In other embodiments, the number of PFC branches can be set as two, four, five to n, and three o...

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Abstract

The invention provides a multipath interleaved PFC control system and method, the system comprises a microcontroller, a rectification circuit, a load circuit and a PFC circuit, and the PFC circuit comprises at least two PFC branches which are connected in parallel between the rectification circuit and the load circuit; each PFC branch comprises an energy storage inductor, a branch diode and an IGBT switch tube. And the microcontroller is used for switching on the IGBT switch tube of any PFC branch when the IGBT switch tube of one PFC branch is in a load fluctuation state. The method is appliedto the control system, the first rated PFC branch is ensured to work in a rated state, the IGBT switch tube of the first rated PFC branch is ensured to be in heating and heat dissipation balance to the maximum extent, the PFC function is ensured, and the first load PFC branch is started when load fluctuation occurs, so that the loss of the IGBT switch tube is reduced, and the service life of theIGBT switch tube is prolonged.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a multi-channel interleaved PFC control system and method. Background technique [0002] Insulated Gate Bipolar Transistor (IGBT) is widely used in many occasions as a main power conversion device in wind power generation, photovoltaic solar power generation, nuclear power generation, household appliances and other industries. In order to solve the harmonic interference of the equipment system on the power grid and the mandatory standards required by the governments of various countries; at the same time, in order to increase the voltage of the circuit system and reduce the system current and power loss, Power Factor Correction (PFC) is used in many circuits. [0003] The PFC circuit is mainly composed of energy storage inductors, IGBTs, and diodes. In order to reduce the current carrying capacity of the IGBT, many design engineers usually use multiple interleaved PF...

Claims

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Application Information

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IPC IPC(8): H02M1/42
CPCH02M1/4208H02M1/0054Y02B70/10
Inventor 王庆娟周雁罗回彬周肖树路良刚
Owner BEIJING INST OF TECH ZHUHAI CAMPUS
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