Electromagnetic heating device and driving detection circuit and method of power switch tube thereof

Abstract

The present invention discloses an electromagnetic heating device, a drive detection circuit of a power switch tube of an electromagnetic heating device, and a drive detection method of a power switchtube of an electromagnetic heating device. The drive detection circuit comprises: a drive module connected with the power switch tube and configured to output drive signals to the power switch tube to drive switching on-off of the power switch tube; a detection module connected with the drive module and configured to generate detection signals according to the drive signals output by the drive module; a counting module configured to regulate a counting value at preset intervals; and a control chip connected with the detection module and the counting module and configured to detect whether thedetection signals are trigged and interrupted or not, perform zero clearing of the counting value of the counting module when the detection signals are trigged and interrupted, obtain a final counting value of the counting module when the detection time reaches preset detection time and determine whether the drive module is abnormal or not according to the final counting value and the voltage state of the drive signals. Therefore, the abnormal conditions of the drive module can be effectively detected, and potential safety hazard is reduced.

Description

technical field [0001] The invention relates to the technical field of household electrical appliances, in particular to a drive detection circuit for a power switch tube in an electromagnetic heating device, an electromagnetic heating device, and a drive detection method for a power switch tube in an electromagnetic heating device. Background technique [0002] Related electromagnetic heating devices such as induction cookers usually drive the IGBT tube through the drive circuit, that is, the drive circuit can provide a drive signal to the IGBT tube to control the IGBT tube to be turned on or off. If the drive circuit is abnormal, it may cause excessive loss of the IGBT tube. , It may even cause the IGBT tube to heat up and burn out, affecting the normal operation of the electromagnetic heating system. [0003] However, the related art does not detect whether an abnormality occurs in the driving circuit. Contents of the invention [0004] The present invention aims to so...

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Problems solved by technology

[0002] Related electromagnetic heating devices such as induction cookers usually drive the IGBT tube through the drive circuit, that is, the drive circuit can provide a drive signal to the IGBT tube to control the IGBT tube to be turned on or off. If the drive circuit is abnormal, it may cause excessive loss of the IGBT tube. , and may even cause the IGBT tube to heat up and burn out, affecting the normal operation of the electromagnetic heating system

[0003] However, the related art does not detect whether the drive circuit is abnormal

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