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Channel furnace with variable frequency power supply

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The intermediate frequency (VF) power supply is an update power supply applied in channel induction furnace
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The intermediate frequency (VF) power supply

is an update power supply applied in

channel induction furnace, which is different

with traditional main frequency (NF)

power supply and is able to regulating

power capacity by means of working frequency.

There is big advantage during its operation.
 

 

Comparison between channel furnace

equipped with VF power supply and

that equipped with traditional power

supply

Channel furnace with variable

frequency power supply

Working principle

 

Based on the working principle, a serial

compensation circuit to be used on VF power

supply. That means the compensation

capacitors to be connected with induction coil

in series way, viz. it is a R-L-C series resonant

circuit and the relation between power

and working frequency to be shown below.


 

 

So, the beneficial function can be shown on the

above curve that more approaching to the

resonant frequency, more active power. Thus

you can regulate the power by changing the

frequency. Regarding to the detail information,

you can refer to the article < The working

principle of resonant inverter with semi-bridge

and series resonant circuit>.

 

To take a proper designing for the resonant

inverter with series resonant circuit and to set

the resonant frequency approaching to 50Hz,

then this resonant inverter can be applied in

channel induction furnace and makes the

furnace to be channel induction furnace with

VF power supply.


 

 

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