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Power-feeding device and induction heating device

A power supply device and electric power technology, applied in the field of induction heating devices and power supply devices, can solve the problems of inability to improve manufacturability, complicated circuit structure, and reduce device cost, and achieve improved manufacturability, easy device design, and simplified structure Effect

Active Publication Date: 2006-09-27
NETUREN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the following problems arise: the circuit structure becomes complicated, the device is enlarged, the manufacturability cannot be improved and the device cost can be reduced, and there are many restrictions on the setting of the frequency, and the lack of versatility

Method used

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  • Power-feeding device and induction heating device
  • Power-feeding device and induction heating device
  • Power-feeding device and induction heating device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0046] figure 1 It is a circuit diagram showing a schematic configuration of the induction heating device according to the first embodiment of the present invention.

[0047] figure 2 is a graph showing the frequency characteristics of impedance in the matching circuit section.

[0048] (Structure of induction heating device)

[0049] exist figure 1 Among them, 100 is an induction heating device, and this induction heating device 100 has an induction heating coil 200 for inductively heating an object 201 to be heated, and a power supply device 300 for supplying power of different frequencies to the induction heating coil 200 for inductive heating .

[0050] The induction heating coil 200 is connected to a power supply device 300 . In this way, the induction heating coil 200 uses an equivalent inductance L0 of tens to hundreds of nH, for example, and is supplied with alternating currents of different frequencies from the power supply device 300 to inductively heat the o...

no. 2 example

[0085] (Structure of induction heating device)

[0086] Next, a schematic configuration of an induction heating device according to a second embodiment of the present invention will be described with reference to the drawings. image 3 is a circuit diagram showing a schematic configuration of the induction heating device in the second embodiment.

[0087] exist image 3 Among them, 400 is an induction heating device, and the induction heating device 400 includes: figure 1 and figure 2 The induction heating device 100 of the first embodiment shown has the same induction heating coil 200 and a power supply device 500 for supplying electric power of a predetermined different frequency to the induction heating coil 200 for induction heating. Furthermore, the power supply device 500 includes the same oscillation circuit part 310 and control circuit part 330 as those of the induction heating device 100 of the first embodiment, and a matching circuit part 520 . Furthermore, in th...

no. 3 example

[0099] (Structure of induction heating device)

[0100] Next, a schematic configuration of an induction heating device according to a third embodiment of the present invention will be described with reference to the drawings. Figure 4 is a circuit diagram showing a schematic configuration of the induction heating device in the third embodiment.

[0101] exist Figure 4 Among them, 600 is an induction heating device, and the induction heating device 600 includes: figure 1 and figure 2 The induction heating device 100 of the first embodiment shown has the same induction heating coil 200 and a power supply device 700 for supplying electric power of a predetermined different frequency to the induction heating coil 200 for induction heating. Also, the power supply device 700 includes the same oscillation circuit section 310 , control circuit section 330 , and matching circuit section 720 as those of the induction heating device 100 of the first embodiment. Furthermore, in th...

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Abstract

A converter (311) converts an AC voltage value (e) to the DC electric power of a DC voltage value corresponding to a set input. An inverter (312) is controlled by a frequency electric power control circuit part (330) to convert the DC electric power to a dual frequency AC electric power for alternately outputting low and high frequencies at a frequency ratio (duty) corresponding to the set input. A matching transformer (321) having a tap (321C) at which the resonance impedance corresponds to the output impedance of an oscillator circuit part (310) receives the dual frequency AC electric power. A low frequency series resonance circuit (325) or a high frequency series resonance circuit (326) is caused to provide a series resonance, thereby causing an induction heating coil (200) to induction heat an object (201) to be heated. In this way, the single oscillator circuit part (310) and the single induction heating coil (200) are used to effectively induction heat the object (201) by means of the dual frequency resonance.

Description

technical field [0001] The present invention relates to a power supply device and an induction heating device for supplying power of different frequencies. Background technique [0002] Conventionally, there is known a power supply device capable of changing the frequency of AC power supplied to the load when controlling the output of an induction load such as an induction motor or an induction heating device (for example, Patent Document 1). [0003] In the device described in Patent Document 1, a first inverter for supplying a high frequency and a second inverter for supplying an intermediate frequency are connected in parallel to one induction coil. That is to say, the first converter providing high frequency acts as a series resonant circuit to reduce the intermediate frequency feedback from the second converter providing intermediate frequency through a capacitor (condenser) for series compensation of reactive power of the induction coil. In addition, while a capacitor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/00H02M5/40H02M5/44H05B6/02H05B6/06H02P27/06H05B6/04
CPCH05B6/04
Inventor 杨跃生田文昭高濑真一热田吾郎
Owner NETUREN CO LTD
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