To study the design and development of a heat engine, multiple-frequency induction furnace for small. The system has been developed with full inverter circuits, the sector is a bridge. A control circuit open On the basis of science and techniques to create a triangle signal compare to driving a signal inverter causing the registry so naen. To adjust the power of the computer relies on high-frequency transformer is the capacity. Operation of the machine, while not yet a hot piece of work relies on a working frequency, high point, away from the oval so naen. When hot work pieces are point point, RI solo naen. The trial generated System Define incoming AC power, kVA kVA up to 2.00 2.80 range low frequency in kHz frequency range approximately 8.10 to 8.40 and high frequency in kHz frequency range about 232.50 kHz to 244.00 kHz circuitry is used to switch to a MOSFET can operate at high frequency. The test results showed that the machine can give the plates work piece diameter 32 mm thick 3 mm from room temperature up to 950 degrees Celsius. It takes about 50 seconds by running in the low frequency range, kHz to about 8.10 and 8.40 kHz high frequency in kHz frequency range about 232.50 power side entrance to 244.00 kHz up to 2.30 2.80 kVA kVA is the incoming power factor is between 0.66 to 0.70.
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