A middle-frequency reversion power and its application in middle-frequency inductance heating furnace
A technology of inverter power supply and inverter circuit, which is applied in the direction of induction heating, induction heating control, induction current source, etc., can solve the problem of single power adjustment method, cannot guarantee system performance, and cannot better meet the work of medium frequency induction heating furnace Requirements and other issues, to achieve high reliability and stability, high power factor effect
Inactive Publication Date: 2010-02-17
GUANGZHOU HONGYANG CASTING CO LTD +1
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Problems solved by technology
[0004] Intermediate frequency induction heating furnaces generally need to adjust the output power in a wide range. A single power adjustment method cannot better meet the working requirements of intermediate frequency induction heating furnaces, nor can it guarantee that the system has better performance.
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[0024] An intermediate frequency inverter power supply, such as figure 1 As shown, in terms of circuit topology, the three-phase alternating current passes through the uncontrollable rectification circuit 1 in turn; the filter circuit adopts a capacitor filter circuit in this embodiment; the series resonant inverter circuit 2; and then outputs the alternating current for the load 3 to use.
[0025] Such as figure 2 As shown, the intermediate frequency inverter power supply of the present invention adopts the method of adjusting the input voltage of the uncontrollable rectification circuit 1 by the transformer compensation controller 4 in terms of power adjustment, and combining with the series resonant inverter circuit 2 to adjust its output voltage, Changing the series resonant power supply can only rely on the single mode of the frequency converter to adjust the power.
[0026] Such as figure 2 As shown, the intermediate frequency inverter power supply of the present inv...
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The invention discloses a medium frequency inverting power supply and an application thereof in a medium frequency induction heating furnace. The medium frequency inverting power supply comprises an uncontrolled rectifying circuit, a filter circuit, an inverter circuit and a transformer compensation controller. Inputted alternating current presently passes through the transformer compensation controller and then enters into the uncontrolled rectifying circuit to control an input voltage of the uncontrolled rectifying circuit; furthermore, the inverter circuit is a series resonant inverter circuit. By adopting the medium frequency induction heating furnace of the medium frequency inverting power supply, power factors are improved.
Description
technical field [0001] The invention relates to an intermediate frequency inverter power supply, in particular to an output power adjustment mode of the intermediate frequency inverter power supply, which is applied in an intermediate frequency heating furnace. Background technique [0002] Induction heating uses the principle of electromagnetic induction to convert electrical energy into heat energy. Intermediate frequency induction heating is widely used in the field of industrial heating due to its high efficiency and low pollution. Due to various reasons, the parallel resonant power supply is generally used in the medium frequency induction power supply in our country at present. It is a current-type inverter. In practical applications, there are disadvantages such as low power factor, large power consumption, and poor system reliability. [0003] The traditional series resonant DC power supply adopts the non-rectification method, and the power factor of the system can b...
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IPC IPC(8): H05B6/04H05B6/08
Inventor 刘华
Owner GUANGZHOU HONGYANG CASTING CO LTD