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PFC circuit and electronic equipment comprising same

A circuit and electrolytic capacitor technology, applied in the electronic field, can solve the problems of high cost, unsafe and stable work and power consumption, etc., and achieve the effect of reducing power consumption and cost

Inactive Publication Date: 2013-11-20
TCL AIR CONDITIONER ZHONGSHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a PFC circuit, which aims to solve the problems that the existing PFC circuit cannot work safely and stably or consumes a lot of power and costs high when it is used in countries and regions with high power loads and low grid voltage , the present invention also proposes an electronic device including the PFC circuit

Method used

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  • PFC circuit and electronic equipment comprising same
  • PFC circuit and electronic equipment comprising same
  • PFC circuit and electronic equipment comprising same

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Embodiment Construction

[0023] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] Such as figure 2 as shown, figure 2 It is a schematic diagram of the circuit structure of a preferred embodiment of the PFC circuit of the present invention. The PFC circuit proposed in this embodiment includes an AC input terminal ACIN, a DC output terminal DCOUT, an IGBT tube module 10, a drive control module 20, and sequentially connected in series at the AC input terminal ACIN The rectifier module 30, the inductance module 40 and the switching diode module 50 between the DC output terminal DCOUT, wherein,

[0025] The IGBT tube module 10 includes a plurality of identical and parallel IGBT tubes G1, the emitter of the IGBT tube G1 is grounded, the collector of the IGBT tube G1 is connected between the inductance module 40 and the switching diode module 50, and the gate K1 of the IGBT tube G1 is connected ...

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Abstract

The invention discloses a PFC circuit and electronic equipment comprising the same. The IGBT module of the PFC circuit comprises a plurality of identical and parallel IGBTs, wherein the emitter of each IGBT is grounded, the collector of each IGBT is connected between an inductive module and a switching diode module, and the grid of each IGBT is connected with a driving control module; the driving control module controls the simultaneous conduction and the simultaneous cut-off of the IGBTs. The electronic equipment and the PFC circuit control the simultaneous conduction of the IGBTs; when the current generated by the inductive module is overlarge, the IGBTs are used for shunting; even if the IGBTs with small current are selected, the IGBTs cannot be burnt; thus, the safe and stable working of the circuit is ensured, the IGBTs with large current and large power are not needed, and the electricity consumption of the IGBTs and the circuit cost are reduced.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a PFC circuit and electronic equipment including the PFC circuit. Background technique [0002] With the continuous improvement of people's living standards, some high-end household appliances have also entered ordinary households, such as: LCD TVs, induction cookers, inverter air conditioners, dust collectors, etc. In addition, due to the compact switching power supply, high efficiency, and low standby power consumption, In addition, when the power exceeds a certain level, the price of switching transformers is cheaper than that of linear transformers, so switching power supplies and high-power inductive loads are widely used in fields such as home appliances. [0003] However, while people are enjoying a high-quality life, due to the nonlinearity of the inductive load and its power supply rectifier diode, its input current cannot follow its voltage waveform, distorting the ...

Claims

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Application Information

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IPC IPC(8): H02M1/42
CPCY02B70/126Y02B70/10
Inventor 李巨林刘旭
Owner TCL AIR CONDITIONER ZHONGSHAN CO LTD
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