Medium-frequency Induction Heating & Sintering Furnace Power Supply

Medium-frequency induction heating & sintering power supply is a medium-frequency induction heating power supply specially designed for sintering furnaces or melting furnaces adopting graphite heaters. In the entire work process, it adopts high-precision power closed-loop control, the working frequency follows the loaded inductance value changes of the induction coil automatically, with whole-course soft switching control, it has a high reliability. With its power factor more than 0.92, power conversion efficiency higher than 0.96 and multiple control signal selections, it is really an ideal energy-saving power supply substituting for medium-frequency generating sets and SCR medium-frequency melting power supply.

Single-crystal growing furnace induction heating power supply series is convenient to operate and use, has a wide range of phase-lock frequency and adaptable to various induction coils. It can be widely used in the vacuum or non-vacuum sintering furnaces or melting furnaces of graphite heaters.

1. It adopts cabinet-type integrated design.

2. The medium-frequency transformer adopts ultracrystalline alloy materials or high-performance ferrite materials, it is characterized by a small size, low losses and a conversion efficiency above 0.95 and the resonant capacitor adopts dry-type low-loss film capacitor with the loss angle less than 0.02percent.

3. The power device adopts IGBT, works in the LC series resonance mode and its working frequency has a wide adaptation range.

4. It is easy to operate and use with a 100percent starting successful rate and an output power continuously adjustable from 3 to 100percent.

5. It has soft start and soft turn-off functions.

6. Adopting power closed-loop control, it has protection functions such as current-limiting, voltage-limiting, power-limiting and phase-deficient, overcurrent, overvoltage and over-temperature protection functions etc.

7. It has an automatic voltage-limiting function, when the output voltage is equal to or greater than 1.1 times of the rated voltage, the voltage will be limited.

8. It has an automatic current-limiting function, when the output current is equal to or greater than 1.1 times of the rated current, the current will be limited.

9. The power factor is more than 0.92 and the conversion efficiency of power supply is higher than 0.96.

10. With the analog or digital isolated conversion & output of medium-frequency voltage, current, frequency and power and multiple control signal selections, it can communicate with PLC and host computer, which is convenient for monitoring.

Technical Parameters



Input





Input voltage

3u00d7380Vu00b115% and 50Hz/60Hz; Others



Power supply of the fan

1u00d7220V,50Hz



Output





Output power

40KW-1000KW



Working frequency

1000HZ,2000HZ,customise



Regulating range of output power

3~100percent of the rated output capacity



Medium-frequency voltage

Set by the user



Applicable load

Induction melting coil



Main Control Characteristics





Given signal

DC:0~5V,0~10V

DC:4~20mA,0~20mA,0~10mA



Control mode

Power closed-loop control



Soft start and soft turn-off time

1-10S



Working mode

Continuous type



Phase-deficient protection

Isolated output:DC:0~5V,0~10V

DC:4~20mA,0~20mA,0~10mA



Output power

Isolated output:DC:0~5V,0~10V

DC:4~20mA,0~20mA,0~10mA



Protection





Phase-deficient protection

It protects in case of input power phase-deficient and cuts off the output



IGBT overcurrent protection

When the IGBT current is equal to or greater than 1.5 times of the rated current, it cuts off the output



Overvoltage protection

When the medium-frequency voltage is equal to or greater than 1.5 times of the rated voltage, it cuts off the output



Overheat protection

When the temperature of the primary radiator is equal to or greater than 80dges, it cuts off the output



Environment





Application environment

Used in rooms at the temperature of -5~+40dges without flammable, combustible and conductive dust



Storage temperature

-5~+60dges



Relative humidity

<=90percent RH and without moisture condensation



Installation

Installation mode

Indoor cabinet-type installation