Multichannel electromagnetic oscillation synchronous generating method and circuit thereof

Abstract

The invention relates to a multichannel electromagnetic oscillation synchronous generating circuit which comprises a power supply, a rectification filter circuit, an LC (Liquid Crystal) oscillation circuit, a switching device, a driving circuit and a synchronous signal circuit and is characterized in that the rectification filter circuit, the LC oscillation circuit, the switching device, the driving circuit and the synchronous signal circuit are connected to form a circuit unit, and two or more than two circuit units are combined together in a parallel way and respectively receive same excitation signals so as to excite electromagnetic oscillation. In the invention, all circuit units have same parameters, the consistency of signals input by a multichannel electromagnetic oscillation circuit is ensured, and respective controls of all circuit units are independent and not mutually interfered, therefore, the alternating magnetic field generated by the oscillation circuit also has uniformsynchronization change, and the unit structure is simple and repeatable, easy to copy and realize multichannel control and beneficial to dispersing the heating power, reduces the loads of all circuitunits, can effectively prolong the service life of each component and reduce circuit faults.

Description

Technical field: [0001] The invention relates to an electromagnetic heating technology, in particular to an electromagnetic heating technology capable of realizing the uniform distribution of magnetic force lines and making the temperature of each point on the heating surface consistent. Background technique: [0002] Due to its high thermal efficiency and fast heating speed, electromagnetic heating technology has been widely used in many fields of human life and industry, such as kitchen induction cooker, high / intermediate frequency quenching equipment, fixing device of imaging equipment, etc., and its application is still in progress. Continuously expanding, such as injection molding machines, aluminum-plastic composite board hot-pressing equipment using electromagnetic heating technical solutions are also seen in many patent documents. The principle of electromagnetic heating is to generate alternating current with a certain frequency through the circuit, and then generat...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of out-of-synchronization of LC oscillation when multi-coil heating, provide a method for synchronous generation of multi-channel LC loop electromagnetic oscillation and a circuit for realizing this method, and at the same time avoid the influence of noise signals on the LC oscillation loop, and realize The synchronous change of the alternating magnetic field of multiple induction coils improves the heating efficiency and makes the multi-coil heating method truly industrialized

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