Working mode of medium frequency power supply equipment
 
Intermediate frequency power supply equipment by the PWM circuit to control the output power, the closed-loop control which is composed of the power detection circuit, the output of the intermediate frequency equipment capacitance and the furnace body constitute a series of circumstances, rather than parallel method. Such big progress in equipment that correct handling, if mediation equipment cooling time, improve the production safety coefficient of intermediate frequency power supply equipment is not. Bring the network side pollution, transformer substation capacitor compensation without heating, no heat, no nuisance to other equipment.
The capacity of power supply transformer: IGW-300 frequency: 315KVA power supply transformer can do and SCR 315KVA transformer can not work, severe fever, and even abandoned. If power equipment for three-phase power supply by the bridge rectifier with LC filter, 500VDC voltage. By then it controlled rectifier, rectifier diode has maximum conduction in things angle, determines the high power factor. The PLL control that frequency, active tracking furnace body natural frequency and other parameters change, link frequency equipment things in zero voltage switching condition, consumption is small, safe area.
Controllable intermediate frequency power supply equipment as semiconductor components, machine parts not Thailand's large, there is no shock and noise in the resettlement of the time on the ground there is no special requirements. The frequency is probably as the load parameter change and completely realize the main dynamic changes. |
