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High efficiency low-temperature-rise induction cooker

A technology of induction cooker and low temperature, applied in the field of induction cooker, can solve the problems of IGBT temperature rise, large turn-on loss, etc., and achieve the effects of reducing operating frequency, large duty ratio and convenient processing

Inactive Publication Date: 2007-08-01
DONGGUAN QIANFENG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the induction cooker works at high voltage and low power, the IGBT is not turned on at zero voltage, and the IGBT turn-on voltage is very high, so the IGBT turn-on loss is large, and the IGBT temperature rises

Method used

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  • High efficiency low-temperature-rise induction cooker
  • High efficiency low-temperature-rise induction cooker
  • High efficiency low-temperature-rise induction cooker

Examples

Experimental program
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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings:

[0014] 1 to 4, the induction cooker of the present invention includes all the accessories of the induction cooker, such as furnace body, heating coil 1, circuit board and IGBT, etc. The heating coil 1 is installed in the furnace body, and the heating coil 1 One or more magnetic strips 2 are attached to the upper side, that is, the upper side of the heating coil 11, and the winding structure of the heating coil 11 can be continuous tight winding or ring-divided winding.

[0015] When in use, the magnetic stripe 2 attached to the heating coil 11 can increase the inductance and Q value of the heating coil 1. The additional magnetic stripe 2 and the heating coil 11 and the induction cooker on the back of the heating coil 11 The magnetic blocks with radial design work together to strengthen the magnetic field, improve the high-frequency operating characteristics of the inductio...

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PUM

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Abstract

The invention relates to an electromagnetic furnace which can effectively reduce the power consumption at the start of IGBT and temperature increase, wherein, the upper side of heating coil is arranged with one or more magnetic bars via adhesive or support, therefore, when in use, the magnetic bar can increase the inductance and Q value of coil, improve the high-frequency working property, reduce the IGBT working frequency, reduce the IGBT switch power consumption, prolong the discharge time, reduce the IGBT start voltage, and reduce the IGBT temperature increase, while the magnetic bar will consume energy in magnetization, to release abundant energy of coil at high-voltage low-shift mode, and the temperature increase will be reduced. The invention has simple structure.

Description

Technical field: [0001] The invention relates to the technical field of induction cookers, in particular to an induction cooker with high efficiency and low temperature rise which can effectively reduce IGBT turn-on loss and temperature rise. Background technique: [0002] The induction cooker is an electric heating device that uses the eddy current generated by the electromagnetic induction principle to heat the pot. Because it has no flame, it is very popular. During use, the electronic components inside the induction cooker, such as IGBTs and bridge stacks, will generate heat, especially IGBTs. When the induction cooker is working at high voltage and low power, the IGBT is not turned on at zero voltage, and the IGBT turn on voltage is very high, so that the IGBT turn-on loss is large and the IGBT temperature rises. How to overcome the turn-on loss of the IGBT, reduce the temperature rise, and save energy is a concern of the industry. Summary of the invention: [0003] The pur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24C7/00
Inventor 李荣明袁灿荣周晓明艾志强
Owner DONGGUAN QIANFENG ELECTRONICS
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