Over-temperature protection method and device for electromagnetic heating system and power device thereof

A technology of power devices and heating systems, applied in the field of electromagnetic heating systems, can solve problems such as IGBT burnout, long response time, and insufficient response speed of over-temperature protection, so as to avoid over-temperature damage and improve reliability

Active Publication Date: 2018-06-08
FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD +1
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  • Claims
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Problems solved by technology

However, the response time of this over-temperature protection method is long, generally several seconds, or even tens of seconds. If some abnormal condition causes the temperature of the IGBT to rise rapidly, exceeding the safe working range of the IGBT, and the response speed of the IGBT over-temperature protection is not fast enough , it may cause the IGBT to burn out before the temperature protection

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  • Over-temperature protection method and device for electromagnetic heating system and power device thereof
  • Over-temperature protection method and device for electromagnetic heating system and power device thereof
  • Over-temperature protection method and device for electromagnetic heating system and power device thereof

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Embodiment Construction

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0029] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicat...

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Abstract

The invention discloses an over-temperature protection method for a power device in an electromagnetic heating system, which comprises the following steps: S1, detecting the current working condition of the electromagnetic heating system; S2, determining the overtemperature protection method according to the current working condition of the electromagnetic heating system A curve corresponding to the current working condition; and S3, performing over-temperature protection on the power device according to the curve corresponding to the current working condition. The over-temperature protection method can predict the temperature of the power device, and can perform over-temperature protection on the power device in advance to avoid over-temperature damage of the power device. The invention also discloses an over-temperature protection device for power devices in the electromagnetic heating system and an electromagnetic heating system with the over-temperature protection device.

Description

technical field [0001] The present invention relates to the technical field of household appliances, in particular to an over-temperature protection method for power devices in an electromagnetic heating system, an over-temperature protection device for power devices in an electromagnetic heating system, and an electromagnetic heating system with the over-temperature protection device . Background technique [0002] In an electric control system of an induction cooker, temperature protection for power devices such as IGBT (Insulated Gate Bipolar Transistor, Insulated Gate Bipolar Transistor) is generally indispensable. Usually, a thermistor is used to sense the temperature emitted by the IGBT. When the temperature of the IGBT changes, the resistance of the thermistor will also change accordingly. This signal is converted into a voltage signal by the temperature detection circuit and then input to the controller MCU. The MCU performs AD conversion on the voltage signal to ob...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/20H05B6/00
Inventor 洪尧枝
Owner FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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