Single-tube resonance soft switch circuit of induction cooker and control method thereof

A resonant circuit and soft switch technology, applied in the field of induction cooker circuit, can solve the problems of affecting the cooking effect and limiting the application range of induction cooker, and achieve the effect of improving performance and reliability

Active Publication Date: 2012-07-04
SHENZHEN MEGMEET ELECTRICAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This false low power output is not a real low power continuous output, which affects th

Method used

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  • Single-tube resonance soft switch circuit of induction cooker and control method thereof
  • Single-tube resonance soft switch circuit of induction cooker and control method thereof
  • Single-tube resonance soft switch circuit of induction cooker and control method thereof

Examples

Experimental program
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Effect test

Example Embodiment

[0022] The structural principle of Embodiment 1 of the single-tube resonant soft switch circuit of the induction cooker of the present invention is as follows figure 2 with image 3 As shown, the single-tube resonance soft switching circuit of the induction cooker includes a rectifier filter circuit, a main resonance circuit and an auxiliary resonance circuit.

[0023] The rectifier filter circuit includes a rectifier bridge DB1, a filter inductor L1 and a filter capacitor C1. The AC input end of the rectifier bridge DB1 is connected to the EMC filtered AC input line, the positive electrode of the output end of the rectifier bridge DB1 is connected to one end of the filter inductor L1, the negative end of the output end of the rectifier bridge DB1 is connected to the negative end of the filter capacitor C1, and the other end of the filter inductor L1 is connected to the filter The positive terminal of the capacitor C1 is connected.

[0024] The main resonance circuit includes a he...

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PUM

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Abstract

The invention discloses a single-tube resonance soft switch circuit of an induction cooker and a control method thereof. The single-tube resonance soft switch circuit of the induction cooker comprises a rectifier and filter circuit, a main resonance circuit and an auxiliary resonance circuit, wherein the main resonance circuit comprises a heating winding disc, a resonance capacitor and a main switching tube, the auxiliary resonance circuit comprises an auxiliary resonance inductor and an auxiliary switch, and a main circuit of the auxiliary resonance circuit is connected with the main switching tube in parallel. When the single-tube resonance soft switch circuit of the induction cooker is in a low-power output sate and the voltage of a collector of the main switching tube cannot be subjected to normal resonance to reach zero, the auxiliary resonance circuit begins working to release residual electric energy of the resonance capacitor before the main switching tube is switched on. According to the invention, the zero-voltage-switching of the main switching tube can be realized in a low-power output state and real low-power continuous output can be reached, so that the performance and reliability of the induction cooker are improved.

Description

[technical field] [0001] The invention relates to an electromagnetic oven circuit, in particular to an electromagnetic oven single-tube resonant soft switch circuit and a control method thereof. [Background technique] [0002] The induction cooker has gradually replaced the traditional electric heating cooker with its advantages of high efficiency and environmental protection. The circuit topology used in it includes full bridge, half bridge and single tube resonance. Although full-bridge and half-bridge circuits have good performance and high efficiency, they are relatively expensive and only suitable for high-end applications. However, a large number of induction cookers used by the general public generally adopt a low-cost single-tube resonant circuit topology. [0003] The principle of the single-tube resonant circuit of the traditional induction cooker is as follows: figure 1 Shown, including the rectifier filter circuit and the main resonant circuit. Wherein, the re...

Claims

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Application Information

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IPC IPC(8): H05B6/06H02M3/335
CPCY02B70/1433Y02B70/1491Y02B70/10
Inventor 高军
Owner SHENZHEN MEGMEET ELECTRICAL CO LTD
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