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Multi-coil electromagnetic heating system and method

A heating system and heating method technology, applied in the field of multi-coil electromagnetic heating systems, can solve the problems of inability to change the output power distribution ratio and fixed power ratio, and achieve the effects of low production cost, small interference and simple operation

Inactive Publication Date: 2011-11-23
SHENZHEN H&T INTELLIGENT CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the application of electromagnetic heating, if it is necessary to heat different parts of the object or different objects in the system, the usual practice is to place electromagnetic heating coils on each part or object, and then connect each coil in series or in parallel, and in different circuits Add corresponding relays to control heating. This method has a big defect, that is, the output power ratio of each coil is fixed, and the distribution ratio of output power cannot be changed. In the process of use, a relay is needed to control the electromagnetic heating of the corresponding circuit. process

Method used

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  • Multi-coil electromagnetic heating system and method

Examples

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Embodiment 1

[0043] This example provides a multi-coil electromagnetic heating system, including: a power supply for selecting alternating currents of different frequencies, and at least two parallel working circuits; the working circuits are respectively connected to the power supply, including electromagnetic heating coils, capacitors and resistors; the power supply is capable of outputting an alternating current covering the resonant frequency range of the operating circuit.

[0044] This example includes at least two working circuits connected in parallel and connected to the power supply. The working circuit is formed by using an electromagnetic heating coil, a capacitor and a resistor in series. Wherein, the working circuit adopts working circuit 1...working circuit n, n is a natural number greater than or equal to 2, working circuit 1...working circuit n adopts electromagnetic heating coils, capacitors and resistors in series, and uses L1...Ln respectively Represents an electromagne...

Embodiment 2

[0052] Different from Embodiment 1, the multi-coil electromagnetic heating system described in this embodiment includes two working circuits connected in parallel and connected to the power supply.

[0053] On the basis of using the power supply to provide alternating currents of different frequencies, the two parallel working circuits are divided into a working circuit 1 and a working circuit 2, and the working circuit 1 is composed of an electromagnetic heating coil L1, a capacitor C1 and a resistor RL1 connected in series , the working circuit 2 is composed of an electromagnetic heating coil L2, a capacitor C2 and a resistor RL2 connected in series. When the power frequency is f1, the output power of the electromagnetic heating coil L1 is PL1L, and the output power of the electromagnetic heating coil L2 is PL2L , PL1L / PL2L>>1; when the power frequency is f2, the output power of the electromagnetic heating coil L1 is PL1H, the output power of the electromagnetic heating coil ...

Embodiment 3

[0056] The difference from Embodiment 2 is that the power source described in this embodiment adopts a high-frequency heating power source.

[0057] In this example, on the basis of utilizing the characteristics of the LC series resonant circuit, by changing the frequency of the power supply, high-frequency heating power supplies of different frequencies are provided, and high-frequency alternating currents of different frequencies are provided. Even if no relay is used, the power supply can be changed The high-frequency alternating current is provided, thereby changing the output power distribution ratio of the electromagnetic heating coil, and controlling different working circuits for multi-coil electromagnetic heating. The interference between the working circuits is small, the production cost is low, and the operation is simple and convenient.

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Abstract

The invention provides a multi-coil electromagnetic heating system and method. The multi-coil electromagnetic heating system comprises a power source used for selectively providing ACs with different frequencies and at least two parallel working circuits, wherein the working circuits are respectively connected with the power source and comprise serially connected electromagnetic heating coils, capacitors and resistors; and the power source can output AC cowering the resonant frequency range of the working circuits. In the invention, no relay is required, the output power distribution ratio of the electromagnetic heating coils is changed by changing the frequency of the power source, the production cost is reduced, and the operation is simple and convenient.

Description

technical field [0001] The invention relates to an electromagnetic heating system, in particular to a multi-coil electromagnetic heating system and method. Background technique [0002] The principle of electromagnetic heating is to generate an alternating magnetic field through the components of the electronic circuit board. When a ferrous container is placed on it, the surface of the container will cut the alternating magnetic force line and generate an alternating current in the metal part of the bottom of the container, that is, eddy current, eddy current The iron atoms at the bottom of the container move at high speed and irregularly, and the atoms collide and rub against each other to generate heat energy, thereby heating the object. In the process of electromagnetic heating, because the iron container generates heat by itself, the heat conversion rate is relatively high, so the application range is relatively wide. In the electromagnetic heating system, multiple coils...

Claims

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Application Information

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IPC IPC(8): H05B6/06
Inventor 苏培涛
Owner SHENZHEN H&T INTELLIGENT CONTROL
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