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Electromagnetic heating circuit and control method and control device thereof

A technology of heating circuit and control method, applied in the direction of induction heating control, induction heating, etc., can solve problems such as large noise, and achieve the effect of reducing noise and reducing pulse current

Active Publication Date: 2014-09-10
FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pulse current will have a certain impact on the service life of the transistor 106. At the same time, at the moment of turning on, due to the large pulse current generated, it will be affected by the hysteresis effect and generate relatively large noise.

Method used

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  • Electromagnetic heating circuit and control method and control device thereof
  • Electromagnetic heating circuit and control method and control device thereof
  • Electromagnetic heating circuit and control method and control device thereof

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Embodiment Construction

[0035] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0036]In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0037] image 3 A schematic structural diagram of an electromagnetic heating circuit according to an embodiment of the present invention is shown.

[0038] Such as image 3 As shown, the electromag...

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Abstract

The invention provides an electromagnetic heating circuit and a control method and a control device of the electromagnetic heating circuit. The electromagnetic heating circuit comprises a power supply module for processing mains supply so as to obtain direct current in a predetermined cycle, a resonance circuit, a transistor connected to the second end and the ground of a resonance circuit, a capacitor element and a switch, wherein the first end of the resonance circuit is connected to the output end of the power supply module, the switch is in series connection with the capacitor element and then connected between the first end and the ground of the resonance circuit. By adopting the technical scheme, large pulse current can be prevented from being produced in the circuit when the transistor is connected for the first time, and noise produced by the hysteresis effect can be reduced.

Description

technical field [0001] The present invention relates to the technical field of electrical appliances with electromagnetic induction, in particular, to an electromagnetic heating circuit, a control method for the electromagnetic heating circuit and a control device for the electromagnetic heating circuit. Background technique [0002] The electromagnetic heating circuit proposed in the related art such as figure 1 As shown, the rectifier bridge circuit 102 is connected in series with the resonant circuit 104, and the transistor 106 (which may be an insulated gate bipolar transistor, ie IGBT) is connected between the resonant circuit 104 and ground. Wherein, the voltage waveform at the output terminal 108 of the rectifier bridge circuit 102 is as follows figure 2 As shown, it is the maximum value U of the mains voltage after being rectified by the rectifier bridge circuit 102. As a result, in each heating cycle of the electromagnetic heating circuit, if the transistor 106 is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B6/06
Inventor 梁三林李新义叶镇宝周伟宏
Owner FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD