AC Three Phase Frequency Converter

In the modern industry that pursues efficiency, flexibility, and intelligence, traditional direct drive methods are no longer able to meet the needs of complex processes. The China SPX CE-certified AC Three Phase Frequency Converter is not only a speed control device, but also a "smart power translator" that connects automation instructions with physical execution mechanisms. By receiving instructions from PLC, DCS, or control panel, it reshapes the form of electrical energy in real-time and accurately, allowing each motor to operate at the most suitable speed, in the smoothest way, and in the most efficient state, thereby transforming rigid power supply into flexible productivity.

Feature:

By limiting the starting current of the high quality AC Three Phase Frequency Converter motor from 5-7 times the rated current during direct start-up to below 1.5 times, the impact on the power grid and stress damage to mechanical transmission are completely eliminated, extending the lifespan of the equipment.

Integrating multiple protection functions such as overcurrent, overvoltage, undervoltage, overload, short circuit, phase loss, and electronic thermal protection, it provides all-weather electronic protection for motors, far exceeding the protection dimensions of traditional thermal relays.

For square torque loads such as fans and pumps, their power consumption is proportional to the third power of the rotational speed. By replacing traditional air doors and valve throttling with variable frequency speed regulation, significant energy savings of 20% -50% can be achieved on average, with a short investment payback period.

Realize stepless smooth speed regulation of the production line, meet the precise speed requirements of different process stages, and improve product quality and consistency. For example, achieving precise synchronous control on the conveyor belt and constant tension control during the winding process.

Working Principle:

Three phase power frequency input → rectified into DC → DC bus filtering and stabilization → PWM signal generated by microprocessor based control unit → IGBT inverter bridge output variable frequency and variable voltage three-phase AC power.

Application

The customized AC Three Phase Frequency Converter controls the cooling water pump, chilled water pump, cooling tower fan, and air conditioning unit fan, and automatically adjusts the flow and air volume according to the actual cooling and heating load, which is the core of achieving building energy conservation.
The AC Three Phase Frequency Converter is used for speed control of water supply pump stations, sewage lift pumps, aerators, and dosing pumps, achieving constant pressure water supply, optimizing processes, and saving energy consumption.

G11KW Technical Data