A kind of electromagnetic heater power control method and device and electromagnetic cooker
An electromagnetic heater and power control technology, applied in the field of electromagnetic heater power control and induction cooker, can solve the problems of inability to achieve power consistency, large power difference and deviation, etc.
Active Publication Date: 2019-05-03
FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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Problems solved by technology
[0003] The current single-tube induction cooker controls the power by setting a target current, and then the insulated gate bipolar transistor (IGBT) drive circuit outputs pulses to make the actual current reach the target current to achieve power control, because the current detection circuit is easily affected by the components. Due to the influence of its own error, humidity, temperature, and magnetic field interference, when the actual current reaches the target current, in the same power range of the same model of induction cooker, the power difference of different samples is relatively large, and the consistency of power cannot be achieved.
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[0035] The specific implementation manners of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described here are only used to illustrate and explain the embodiments of the present invention, and are not intended to limit the embodiments of the present invention.
[0036] First, set the target pulse width according to different power requirements. The target pulse width can be conditioned on the output power of each power gear. For example, when the pulse width corresponding to the 1st gear firepower-1000W power is 5μs, set the 1st gear firepower-1000W target pulse width to 5μs. Therefore, the pulse width cannot determine a fixed optimal value. It is necessary to test the power demand of each gear according to the actual machine, and then set the target pulse width according to the width corresponding to this power.
[0037] figure 1 It i...
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The invention provides an electromagnetic heater power control method and device and an electromagnetic oven. The electromagnetic heater power control method comprises the steps that a practical impulse width of the electromagnetic heater is detected when the electromagnetic heater works; the practical impulse width and a target impulse width corresponding to required power are compared; and if the practical impulse width is within the range of 90% to 110% of the target impulse width, a driving impulse is generated according to the practical impulse width, if not, the practical impulse width is modified till the practical impulse width is within the range of 90% to 110% of the target impulse width, and the driving impulse is generated according to the practical impulse width. According tothe electromagnetic heater power control method, different target turning-on impulse widths can be set according to different power requirements. A circuit is driven to output impulses to drive IGBT to work according to the practical impulse width, and accordingly the purpose that the power of different samples is consistent in the same type of electromagnetic oven and the same power gear is achieved.
Description
technical field [0001] The invention relates to an electromagnetic heater, in particular to a power control method and device for an electromagnetic heater and an electromagnetic cooker. Background technique [0002] The electromagnetic heater adopts the heating principle of magnetic field induction current, that is, the high-frequency current is generated through the electronic circuit board, the input AC power is converted into DC voltage by the rectifier circuit, and then the DC voltage is converted into high-frequency high-frequency voltage by the control circuit. , through the spiral magnetic induction coil, the alternating magnetic field of the high-frequency induction cooker is formed. When the magnetic force line in the magnetic field passes through the bottom of the ferromagnetic material vessel, an alternating eddy current is generated in the vessel, which makes the iron molecules of the pan move at high speed and irregularly, and the molecules collide with each oth...
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IPC IPC(8): F24C7/08H05B6/06
CPCF24C7/082H05B6/062H05B2206/02
Inventor 秦继祥汪钊周升李娟杜放
Owner FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD