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Electromagnetic cooker

A technology of induction cooker and magnetic strip, which is applied in the field of induction cooker, can solve the problems of large turn-on loss and IGBT temperature rise, and achieve the effects of large duty cycle, lower operating frequency, and lower turn-on loss

Inactive Publication Date: 2009-07-08
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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Embodiment Construction

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

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

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

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Abstract

The invention relates to the technical field of induction cooker, in particular to an induction cooker which can effectively reduce IGBT turn-on loss and temperature rise. One or more magnetic strips are added on the upper side of the heating coil of the electromagnetic oven, and the additional magnetic strips can be pasted on the surface or erected on the upper side of the heating coil. In this way, when using an induction cooker, the magnetic strip attached to the heating coil can increase the inductance and Q value of the reel, improve the high-frequency operating characteristics of the induction cooker, reduce the IGBT operating frequency, reduce the IGBT switching loss, and make the reel high-voltage and low-grade charging time Short, long discharge time, lower IGBT turn-on voltage, thereby reducing IGBT turn-on loss, IGBT temperature rise is reduced; at the same time, the magnetic strip consumes energy during the magnetization process, and when working at high voltage and low gear, the excess energy of the coil is released as heat energy , the IGBT duty cycle is large, so the temperature rise is low; the invention has simple structure, convenient processing and strong practicability.

Description

Technical field: [0001] The invention relates to the technical field of induction cooker, in particular to an induction cooker capable of effectively reducing 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 principle of electromagnetic induction to heat the pot. It is very popular because it has no flame. During use, the electronic components inside the induction cooker, such as IGBT, bridge stack, etc., will generate heat, especially the IGBT. 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. How to overcome the turn-on loss of IGBT, reduce temperature rise, and save energy is a concern of the industry. Invention content: [0003] The object of the present invention is to provide an inductio...

Claims

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Application Information

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Patent Type & Authority Patents(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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