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Induction cooker

A technology of induction cooker and resistance, which is applied in the field of induction cooker, can solve the problems of IGBT easy damage, achieve the effect of reducing cost, simplifying circuit structure and saving pins

Active Publication Date: 2017-11-03
ZHEJIANG SHAOXING SUPOR DOMESTIC ELECTRICAL APPLIANCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve at least one of the problems mentioned in the background technology, the present invention provides an induction cooker to solve the problem that the IGBT in the existing induction cooker is easily damaged

Method used

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Examples

Experimental program
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Embodiment Construction

[0041] figure 1 Structural representation of the electromagnetic oven provided by the present invention Figure 1 . Such as figure 1 Shown, the electromagnetic oven provided by the invention comprises:

[0042] IGBT drive circuit 10, IGBT11 and resonant circuit 12, control chip 13, first resistor 14, voltage dividing element 15, second resistor 16 and first diode 17; wherein,

[0043] The output end of the IGBT drive circuit 10 is connected to the gate of the IGBT11, the collector of the IGBT11 is connected to the first end of the resonant circuit 12, the emitter of the IGBT11 and the second end of the resonant circuit 12 are connected to the power supply, and the emitter of the IGBT11 is grounded , and connected to the power supply;

[0044] The first end of the first resistor 14 is connected with the DC power supply, the second end of the first resistor 14 is connected with the first end of the voltage dividing element 15 and the output pin of the control chip 13 respect...

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Abstract

The invention provides an induction cooker. The induction cooker comprises an IGBT driving circuit, an IGBT, a resonance circuit, a control chip, a first resistor, a voltage division element, a second resistor and a first diode; the output pin of the control chip is connected with the connecting point of the first resistor and the voltage division element; and by detecting the voltage value of the connecting point, whether a direct current power supply has fluctuations or not can be judged, so that the driving voltage output by the output end of the control circuit can be determined according to the value of the direct current power supply. One pin is shared for voltage sampling and signal outputting, so that addition of a sampling circuit and a voltage comparison circuit in the induction cooker can be avoided, so that the circuit structure is simplified and the pins of the control chip can be saved, thereby lowering the costs of the control chip and the induction cooker; and the driving voltage output by the output end of the control circuit is determined according to the value of the direct current power supply, so that the IGBT is protected.

Description

technical field [0001] The invention relates to the technical field of circuit structures, in particular to an electromagnetic cooker. Background technique [0002] Induction cooker has many advantages such as safety, no open flame, high efficiency, energy saving and cleanliness. It is a common household electrical equipment. [0003] The switching device of the induction cooker usually uses an insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, referred to as IGBT), and the IGBT driving circuit provides a driving voltage to the gate of the IGBT to drive the IGBT to turn on or off. When the drive voltage provided by the IGBT drive circuit to the gate of the IGBT is a high voltage, such as 15-20V, the IGBT is turned on in a saturated state; when the drive voltage provided by the IGBT drive circuit to the gate of the IGBT is a low voltage, such as 0V -1V, the IGBT is turned off. [0004] However, in the process of using the induction cooker, when the user p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B6/06
CPCH05B6/062
Inventor 赵礼荣丁韩吉孙鹏刚
Owner ZHEJIANG SHAOXING SUPOR DOMESTIC ELECTRICAL APPLIANCE CO LTD
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