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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: 2020-09-08
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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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 triode 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 respec...

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Abstract

The invention provides an electromagnetic cooker. The induction cooker includes: an IGBT drive circuit, an IGBT, a resonant circuit, a control chip, a first resistor, a voltage dividing element, a second resistor and a first triode. The output pin of the control chip is connected to the connection point of the first resistor and the voltage dividing element. By detecting the voltage value at the connection point, it can be judged whether there is fluctuation in the DC power supply, and then the output of the control circuit can be determined according to the size of the DC power supply. terminal output drive voltage. By sharing the same pin for voltage sampling and signal output, it avoids adding a sampling circuit and a voltage comparison circuit in the induction cooker, simplifies the circuit structure, and saves the pins of the control chip, thereby reducing the cost of the control chip and the induction cooker. The IGBT is protected by determining the driving voltage output by the output terminal of the control circuit according to the magnitude of the DC power supply.

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 Patents(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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