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Electromagnetic heating device and control method thereof

A technology of an electromagnetic heating device and a control method, which is applied to the control of electromagnetic heating devices, and the field of electromagnetic heating devices, can solve the problems of people's influence and physical health and the normal operation of electrical appliances, so as to meet the needs of life, the control method is simple and easy to implement, and the reduction of effect of influence

Active Publication Date: 2015-09-09
MIDEA GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] When the electromagnetic interference is large, it will affect people's health and the normal work of other electrical appliances, and have a great impact on people's lives.

Method used

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  • Electromagnetic heating device and control method thereof
  • Electromagnetic heating device and control method thereof
  • Electromagnetic heating device and control method thereof

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Embodiment Construction

[0030] 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.

[0031] 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 a control method of an electromagnetic heating device. The control method comprises the following steps: detecting a working current of a power switch of the electromagnetic heating device; and adjusting pulse width of a control signal for controlling the power switch to be turned on and turned off according to the working current so as to enable the working current to change between a preset target lower-limit current and a preset target upper-limit current. The control method of the electromagnetic heating device can change working frequency of the electromagnetic heating device by adjusting the pulse width of the control signal, thereby suppressing electromagnetic interference generated by the electromagnetic heating device during working, reducing the electromagnetic interference, reducing influence of the electromagnetic interference on the health of human body and normal working of other electric appliances, and fully meeting living needs of people. The invention also discloses the electromagnetic heating device.

Description

technical field [0001] The invention relates to the technical field of electromagnetic heating, in particular to a control method of an electromagnetic heating device and an electromagnetic heating device. Background technique [0002] After the output power of the current induction cooker is stable, the IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) drive unit works in the fixed frequency PWM (Pulse Width Modulation, pulse width modulation) control mode, and the PWM square wave signal is as follows: figure 1 shown. Most of the energy is limited to the fundamental wave and lower harmonics. The frequency spectrum of the harmonics is generally narrow in bandwidth and the harmonic amplitude is large, so the electromagnetic interference caused by the fixed frequency is relatively large. [0003] When the electromagnetic interference is large, it will affect people's health and the normal work of other electrical appliances, which will have a great i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B6/06
Inventor 秦继祥谢波陈永顺
Owner MIDEA GRP CO LTD
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