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IGBT drive protection circuit and home appliance

A technology for driving protection circuits and driving circuits, which is applied to electrical components, electronic switches, pulse technology, etc., and can solve problems such as shortage of pin resources

Active Publication Date: 2017-11-21
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

[0004] However, since the comparator circuit needs to be connected to the pins of the MCU, the pin resources of the MCU are more scarce

Method used

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  • IGBT drive protection circuit and home appliance
  • IGBT drive protection circuit and home appliance

Examples

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Embodiment Construction

[0021] figure 1 It is a schematic structural diagram of the IGBT driving protection circuit provided by Embodiment 1 of the present invention. The IGBT drive protection circuit provided in this embodiment can be applied to household appliances heated by the principle of electromagnetic induction, such as electromagnetic heating rice cookers, electromagnetic heating electric pressure cookers, and induction cookers. Such as figure 1 As shown, the IGBT drive protection circuit provided in this embodiment may include: an MCU 11 , a drive protection circuit 12 , a surge protection circuit 13 and an IGBT drive circuit 14 .

[0022] The output end of the drive protection circuit 12 and the output end of the surge protection circuit 13 are connected to the same input port of the MCU 11 , and the IGBT drive circuit 14 is connected to the output port of the MCU 11 , and the IGBT drive circuit 14 is used to connect the IGBT.

[0023] The surge protection circuit 13 is used for sampling...

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Abstract

The invention provides an IGBT (Insulated Gate Bipolar Transistor) driving protection circuit and a home appliance. The IGBT driving protection circuit includes an MCU (Microcontroller Unit), a driving protection circuit, a surge protection circuit and an IGBT driving circuit. The output end of the driving protection circuit and the output end of the surge protection circuit are connected to the same input port of the MCU, and the IGBT driving circuit is connected to the output port of the MCU. The MCU is used for determining whether a voltage input to the input port is greater than a first preset value, and outputting a first signal to the IGBT driving circuit to enable the IGBT driving circuit to make an IGBT switched off if the voltage input to the input port is greater than the first preset value. The driving protection circuit is used for outputting a first voltage to the input port when a voltage input to the driving protection circuit is smaller than a second preset value, wherein the first voltage is greater than the first preset value. As the driving protection circuit and the surge protection circuit share the same input port of the MCU, the port resources of the MCU are saved, and the utilization rate of ports is improved.

Description

technical field [0001] The present invention relates to the technical field of household appliances, in particular to an insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT) drive protection circuit and household appliances. Background technique [0002] The IGBT is an important part of the induction cooker, and the IGBT is usually turned on and off by the IGBT drive circuit. When the plug of the induction cooker is unplugged or the plug of the induction cooker is loose, the internal working voltage of the induction cooker will be unstable. If the drive circuit of the IGBT turns on the IGBT when the drive voltage is too low, the IGBT may be damaged because it cannot be saturated. [0003] At present, in order to realize the power-down protection of the induction cooker, a comparator circuit is usually added. The comparator circuit judges whether the driving voltage of the IGBT driving circuit is too low, and turns off the IGBT to protect the IGBT whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/081H03K17/567
CPCH03K17/08116H03K17/567Y02B70/10
Inventor 孙鹏刚赵礼荣
Owner ZHEJIANG SHAOXING SUPOR DOMESTIC ELECTRICAL APPLIANCE CO LTD
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