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Power choking coil and electromagnetic induction heater adopting same

A technology of electromagnetic induction heating and choke coils, which is applied in the direction of induction heating, can solve the problems of IGBT heat loss and poor heating effect, and achieve the effects of small heat loss, good heating effect and system safety

Active Publication Date: 2012-04-25
MIDEA GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the existing 2000W induction cooker, due to the limitation of the single-tube resonant topology, can achieve continuous low-power continuous heating with a minimum power of about 1000W. Heat loss, the lower the power, the more serious the heat loss, such as the heating effect is very poor when intermittent heating is used

Method used

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  • Power choking coil and electromagnetic induction heater adopting same
  • Power choking coil and electromagnetic induction heater adopting same
  • Power choking coil and electromagnetic induction heater adopting same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0021] Such as figure 1 , figure 2 As shown, the power choke coil L2 of this embodiment includes an annular magnetizer 1 and a coil winding 2 surrounding the annular magnetizer. The outer surface of the annular magnetizer is coated with an insulating layer. Stranded.

[0022] The diameter of the enameled wire 21 is less than 0.6mm. The annular magnetizer 1 is made of ferrite material. The annular magnetizer is a closed loop.

[0023] Such as image 3 , Figure 4 As shown, this embodiment also discloses an electromagnetic induction heating device, which includes a parallel coil disk L1 and a resonant capacitor C1, and the power choke coil L2 is connected in series between the coil disk L1 and the resonant capacitor C1. The two ends of the power choke coil L2 are connected with a switching device S1.

[0024] In this embodiment, the switching device S1 is a single-pole single-throw relay.

Embodiment ２

[0026] Such as Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that the switching device S1 is a single-pole double-throw relay. Other structures are the same as in Embodiment 1.

Embodiment 3

[0028] Such as Figure 6 As shown, the difference between this embodiment and Embodiment 1 is that the annular magnetizer is made of silicon steel, and there is a gap of 3 mm in the middle.

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Abstract

The invention relates to a power choking coil, which comprises an annular magnetizer and a coil winding encircled on the annular magnetizer, wherein the outer surface of the annular magnetizer (1) is coated with an insulating layer. The power choking coil is characterized in that the coil winding is formed by twisting more than three strands of enamelled wires. An electromagnetic induction heater provided by the invention comprises a coil panel and a resonance capacitance in parallel, and is characterized in that the power choking coil is serially connected between the coil panel and the resonance capacitance, and switching devices are respectively connected onto the two ends of the power choking coil. Compared with the prior art, the invention has the following beneficial effects that: since the electromagnetic induction heater is additionally provided with the power choking coil on the front end of the coil panel, when low-power heating is required, the power chocking coil is connected into the circuit through the switching devices, the existing resonance state is changed, zero-voltage switch of an IGBT (Insulated Gate Bipolar Transistor) is realized, the heat loss of the IGBT is small, and the system is safe, therefore, not only is the low-power continuous heating realized, but also the heating effect of the electromagnetic induction heater is better.

Description

technical field [0001] The invention relates to a power choke coil and an electromagnetic induction heating device using the power choke coil, which belongs to the improvement technology of electromagnetic cooker products. Background technique [0002] At present, the existing 2000W induction cooker, due to the limitation of the single-tube resonant topology, can achieve continuous low-power continuous heating with a minimum power of about 1000W. Heat loss, the lower the power, the more serious the heat loss. For example, the heating effect is very poor when intermittent heating is used. Contents of the invention [0003] The object of the present invention is to provide a power choke coil capable of continuous low-power heating with good heating effect and an electromagnetic induction heating device using the power choke coil in consideration of the above problems. [0004] The technical solution of the present invention is: a power choke coil, including a ring-shaped ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B6/02
Inventor 任玉洁柳隽唐志明王帅
Owner MIDEA GRP CO LTD
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