Electromagnetic heating cooking device, drive circuit of power switch tube and method thereof
A technology for power switch tubes and cooking devices, which is applied to electric heating devices, induction heating devices, electric/magnetic/electromagnetic heating, etc., can solve the problem of inability to detect whether a drive circuit fails, high junction temperature of power switch tubes during running time, and power switches The instantaneous loss of the tube is large, and the effect of preventing the burning of the power switch tube, realizing the fault detection and preventing the burning is achieved.
Active Publication Date: 2020-09-01
FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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Problems solved by technology
However, the disadvantage of the related technology is that it is impossible to detect whether the drive circuit is faulty, which may cause a large instantaneous loss of the power switch tube when a fault occurs, and the power switch tube will be burned due to high junction temperature if the operation time is too long
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[0041] 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 and are intended to explain the present invention and should not be construed as limiting the present invention.
[0042] The following describes the electromagnetic heating cooking device, the driving circuit of the power switch tube and the fault detection method proposed by the embodiments of the present invention with reference to the accompanying drawings.
[0043] figure 1 It is a schematic block diagram of a drive circuit of a power switch tube in an electromagnetic heating cooking device according to an embodiment of the present invention. like figure 1 As shown, the driving circuit includes: a driving unit 1 , a voltage transformin...
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The invention discloses an electromagnetic heating cooking device, a drive circuit for a power switching tube, and a method of the drive circuit. The drive circuit comprises a drive unit which outputsa drive signal to a control end of the power switching tube, so as to drive the power switching tube to be on or off; a voltage transformation unit which is connected with the drive unit so as to adjust a drive voltage corresponding to the drive signal, and to enable the power switching tube to work in an amplification state or a saturated conduction state; a current sampling unit which is used for sampling a current of the power switching tube, so as to respectively generate a first current value and a second current value according to the current in the amplification state or the saturatedconduction state; and a control chip which is connected with the current detection unit, the drive unit and the voltage transformation unit, and is used for controlling the electromagnetic heating cooking device to carry out the constant-power heating at preset power through the drive unit, and judging whether the drive unit and the voltage transformation unit have faults or not according to the first and second current values, thereby achieving the fault detection, and improving the safety of a product.
Description
technical field [0001] The invention relates to the technical field of home appliances, in particular to a drive circuit for a power switch tube in an electromagnetic heating cooking device, an electromagnetic heating cooking device, and a fault detection method for a drive circuit for a power switch tube in an electromagnetic heating cooking device. Background technique [0002] In the related art, the electromagnetic heating cooking device usually drives the power switch tube to be turned on and off through a driving circuit. However, the disadvantage of the related technology is that it is impossible to detect whether the drive circuit is faulty, which may cause a large instantaneous loss of the power switch tube when a fault occurs, and the power switch tube will burn out due to high junction temperature if the operation time is too long. [0003] Therefore, the driving technology of the electromagnetic heating cooking device in the related art needs to be improved. Co...
Claims
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IPC IPC(8): H05B6/06H05B6/12
CPCH05B6/062
Inventor 江德勇王云峰
Owner FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD