Electromagnetic heating cooker and control method and control apparatus therefor

A control method and technology of a control device, which are applied to electric heating devices, induction heating control, induction heating devices, etc., can solve the problems of vibration stop of resonant circuit 3, inversion of comparator E output, heating, etc.
CN107708243AActive Publication Date: 2018-02-16ZHEJIANG SHAOXING SUPOR DOMESTIC ELECTRICAL APPLIANCE CO LTD
2 Cites 14 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG SHAOXING SUPOR DOMESTIC ELECTRICAL APPLIANCE CO LTD
Publication Date
2018-02-16

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides an electromagnetic heating cooker and a control method and a control apparatus therefor. The electromagnetic heating cooker comprises a resonance circuit and an IGTB; the resonance circuit, the IGBT and an external power supply form an electromagnetic oscillation circuit; the control method comprises the steps of obtaining the input voltage of the external power supply; andwhen the input voltage is less than a preset threshold value, increasing the width of a PWM pulse signal for controlling on-off of the IGBT. By virtue of the electromagnetic heating cooker and the control method and the control apparatus therefor, oscillation stop of the resonance circuit of the electromagnetic heating cooker can be prevented without needing a timing circuit or a coupling circuit,so that the electromagnetic heating cooker is simple and easy to use, and low in cost.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to an electromagnetic heating cooker, a control method and a control device thereof, and belongs to the technical field of kitchen appliances. Background technique

[0002] Heating food by electromagnetic induction is not only clean and hygienic, but also convenient and efficient, so it is used in more and more kitchen appliances, such as induction cooker, rice cooker and hot pot.

[0003] figure 1 It is a schematic circuit diagram of an induction cooker in the prior art. Such as figure 1 As shown, the induction cooker includes a bridge rectifier circuit 1 , a filter circuit 2 , a resonant circuit 3 , an IGBT 4 , a synchronous circuit 5 , an MCU 6 , a PWM modulation circuit 61 , and an IGBT drive circuit 7 connected in sequence. After the AC mains ACV passes through the bridge rectifier circuit 1 and the filter circuit 2, a DC voltage is obtained at point A.

[0004] In the initial stage, both D point and R point are set to lo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More