Method for anti-surge circuit for electromagnetic induction heating appliance

An electromagnetic induction heating and anti-surge technology, which is applied in induction heating, emergency protection circuit devices for limiting overcurrent/overvoltage, electrical components, etc. Damage and other issues
CN102332713BInactive Publication Date: 2015-02-25SHENZHEN H&T INTELLIGENT CONTROL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHENZHEN H&T INTELLIGENT CONTROL
Publication Date
2015-02-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an anti-surge circuit for an electromagnetic induction heating appliance. The anti-surge circuit comprises a disturbance waveform obtaining unit, a triggering signal forming unit and a triggering signal outputting unit; the duration of a triggering signal output by the triggering signal forming unit is more than that of a disturbance waveform, wherein the input end of the disturbance waveform obtaining unit is connected to a direct-current voltage output end of a rectification unit; the output end of the disturbance waveform obtaining unit is connected to the input end of the triggering signal forming unit; the output end of the triggering signal forming unit is connected to the input end of the triggering signal outputting unit; the output end of the triggering signal outputting unit is connected with a control end of a switch device; and the output end of the triggering signal forming unit is also connected with an interruption input end of a control unit. By utilizing the anti-surge circuit for the electromagnetic induction heating appliance, the heating appliance and the method disclosed by the invention, the switch device cannot be damaged.
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Description

technical field

[0001] The present invention relates to household appliances, more specifically, to a surge prevention method for electromagnetic induction heating appliances. Background technique

[0002] Surge disturbances widely exist in reality, such as lightning, starting and stopping of motors, etc., will generate surge voltage on the AC power supply or AC grid. When the surge voltage enters other electrical appliances, it will cause a sharp change in its voltage, which will affect the normal operation of other electrical appliances, and even damage the components in the electrical appliances in severe cases. People usually take steps to avoid its interference. Such as figure 1 As shown, in the prior art, when the power input of the induction cooker generates surge interference, the interference signal is amplified by the secondary of the current transformer T1 and rectified by D1, D2, D3, D4, and a disturbance signal is generated at the positive terminals of D1 and ...

Claims

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