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Electromagnetic heating circuit, and electromagnetic heater and current regulation method

A technology for heating circuits and heating appliances, applied in the field of induction cookers, can solve problems such as damage to IGBT modules, excessive drain-source current, etc.

Pending Publication Date: 2019-07-05
ZHEJIANG SHAOXING SUPOR DOMESTIC ELECTRICAL APPLIANCE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an electromagnetic heating circuit, an electromagnetic heating appliance and a current adjustment method to solve the problem of damage to the IGBT module caused by the excessive drain-source current when the electromagnetic heating appliance is in a low-power state when the IGBT module is turned on in the existing electromagnetic heating circuit. The problem

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  • Electromagnetic heating circuit, and electromagnetic heater and current regulation method
  • Electromagnetic heating circuit, and electromagnetic heater and current regulation method
  • Electromagnetic heating circuit, and electromagnetic heater and current regulation method

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Embodiment Construction

[0076] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments in the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the embodiments of the present invention.

[0077] At present, when the electromagnetic heating device 10 is heated at low power, in the existing electromagnetic heating circuit, if the drain of the IGBT module 105 still has a certain voltage, the IGBT module 105 is turned on, and the transient current of the conduction is relatively low...

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Abstract

The invention provides an electromagnetic heating circuit (100), an electromagnetic heater (10) and a current regulation method. The electromagnetic heating circuit (100) comprises a micro-processingunit (101), a level conversion circuit (102), a waveform conversion circuit (103), a push-pull circuit (104) and an IGBT module (105). The first output end of the micro-processing unit (101) is connected with the level conversion circuit (102), the second output end of the micro-processing unit (101) is connected with the waveform conversion circuit (103), the input end of the push-pull circuit (104) is connected with the level conversion circuit (102) and the waveform conversion circuit (103), the output end of the push-pull circuit (104) is connected with the gate of the IGBT module (105), and the micro-processing unit (101) controls on-off of the waveform conversion circuit (103), so that the instantaneous current of the IGBT module (105) is greatly reduced when the electromagnetic heater (10) works, and the working condition of the IGBT module (105) is improved.

Description

Technical field [0001] The present invention relates to the technical field of electromagnetic ovens, in particular to an electromagnetic heating circuit, an electromagnetic heating appliance and a current adjustment method. Background technique [0002] The electromagnetic heating circuit can use the principle of electromagnetic induction to convert electrical energy into heat energy to heat the equipment to be heated. The electromagnetic heating circuit has a wide range of applications, such as electric rice cookers, electric pressure cookers, soymilk machines, coffee machines, blenders and other electromagnetic heating appliances that require heating functions. [0003] Generally, when the electromagnetic heating device is heated with high power, in the existing electromagnetic heating circuit, when the voltage on the drain of the insulated gate bipolar transistor (IGBT) module crosses zero, the IGBT module is turned on. The current of the IGBT module is very small. However, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B6/06
CPCH05B6/06
Inventor 孙鹏刚赵礼荣
Owner ZHEJIANG SHAOXING SUPOR DOMESTIC ELECTRICAL APPLIANCE CO LTD
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