Control circuit for electromagnet of low-tension switch electric appliance
A low-voltage switch and control circuit technology, applied to circuits, relays, electrical components, etc., to achieve the effects of prolonging working life, reducing energy consumption, and reducing volume
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[0014] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
[0015] figure 1 It is the principle diagram of the control circuit of the electromagnet of the invention patent CN99122868. It has been described in the background art and will not be repeated.
[0016] Referring to FIG. 2 , this is a hardware principle block diagram of the electromagnet control circuit of the low-voltage switch appliance of the present invention.
[0017] The electromagnet control circuit includes an external AC power input 1, a rectifier filter circuit 2, a self-feedback pulse width modulation and IGBT drive circuit 3, a startup delay circuit 4, an input voltage sampling circuit 5, a control chip circuit 6, and an electromagnet 7. .
[0018] Signal transmission between the above circuits: the external AC power input 1 is rectified and filtered by the rectification and filter circuit 2 and then transmitted to the self-feedback pulse...
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