Series one towed two medium frequency power supply

Brand:     LuoYangDingHong

Product Name:     Series one towed two medium frequency power supply

Product Specifications:     One drag two, one drag n medium frequency power supply

Application Areas:     Metallurgy, forging, casting, refining, machinery, building materials, and other manufacturing industries

Product Features:     Low energy consumption, high efficiency, easy to control, no pollution, small harmonics, safe and reliable

The function of one to two power supply is to use two intermediate frequency power sources to connect two furnace bodies to work at the same time. One furnace body distributes high power for rapid melting, and the other furnace body distributes low power insulation, when heat preservation casting After the completion, the small power is converted into high-power smelting, and the furnace smelting to the casting temperature is then insulated from high power to low power, that is, the power source can freely distribute the power between two furnaces operating at the same time. In addition, it is also possible to allocate equal power (half of rated power) to two furnaces, or to allocate power without one power supply, and to allocate power or power at the same time, which has greater flexibility and practicability.

First: the power factor is high.

The series inverter adopts the frequency modulation and power adjustment, that is, the power of the device is adjusted by changing the inverter frequency, and the rectifier part of the thyristor is completely in the on state, unlike the parallel resonance, the output power is adjusted by adjusting the DC voltage. In the intermediate frequency electric furnace and the post-heating process, the thyristor is still fully open, greatly improving the power factor of the equipment and minimizing the pollution of the high-order harmonics to the grid.

Second: The product always maintains constant power output during the smelting process.

Compared with the parallel inverter medium frequency power supply, the power adjustment mode is different. The parallel intermediate frequency power supply is regulated by the DC voltage. The product produced by our company is the frequency modulation. It is not affected by the charge and maintains constant power throughout the melting process. Especially when melting non-magnetic materials such as stainless steel, copper, industrial silicon, aluminum, etc., it shows its superiority. The melting speed is fast, the burning of the burning elements is less, the energy saving effect is better, and the casting cost is reduced.

Third: high power utilization.

The series inverter adopts the method of voltage resonance, and when the incoming line voltage is low, a very high voltage can be obtained on the induction coil of the furnace body. The same power minimizes the resonant current in the induction loop, which reduces power consumption.

Fourth: the startup performance is good.

The series resonant intermediate frequency power supply does not use the sweep start mode of the parallel resonant power supply, but starts the device with a start frequency of half the rated frequency. After starting, change the frequency and change the inverter angle to adjust the power. In the past, when the parallel inverter power supply was in the cold furnace, the impedance of the electric furnace was too low, and the intermediate frequency voltage feedback was too small, which caused the voltage feedback to be impossible to be established, and the equipment could not be started. Series inverters fundamentally solve this problem.

Fifth: higher transformer utilization

The series inverter adopts the voltage resonance frequency modulation power adjustment inverter mode, and can carry two or more inverter bridges under one rectifier bridge, which is convenient for one power supply belt with two or more electric furnaces, and the power between the furnace bodies is arbitrarily distributed. The advantage is more obvious when there is a need for continuous operation and more insulation.

Sixth: high equipment stability

The series inverter is powered by a constant voltage source, the inverter side is voltage resonance, and the current through the inverter side thyristor is approximately sinusoidal. The impact on the thyristor component is small. The parallel inverter is powered by a constant current source, the inverter side is current resonance, and the current passing through the inverter side is a rectangular wave. In this way, on the one hand, the higher harmonics in the rectangular wave cause a waste of electrical energy. On the other hand, the impact of the rising and falling edges of the rectangular wave on the thyristor is very large. It is easy to cause thyristor overcurrent breakdown in the event of a fault. Therefore, the failure rate of the series inverter is lower.