WD5100 Medium Voltage VFD Case Study

Background

Large industrial motors used in compressors, fans, and water pumps typically operate at medium voltage levels (2.3kV–10kV) with power ratings reaching several thousand kilowatts. Running these motors at fixed speed leads to significant energy waste, mechanical stress during startup, and limited process control — all of which increase operating costs and reduce equipment lifespan.

Challenge

The customer required a reliable medium voltage drive solution capable of handling a wide voltage range (2.3kV/3.3kV/6kV/10kV) and power up to 10,000kW, while maintaining high efficiency, precise speed control, and stable operation across compressor, motor, and pump applications.

Solution: Wolong WD5100 Series

Wolong supplied the WD5100-9000-M100-AT, a three-phase medium voltage VFD engineered for heavy industrial loads. Key aspects of the solution included:

• Wide Voltage Compatibility: Supports 2300V/3300V/6000V/10000V input, allowing flexible deployment across different plant electrical systems

• High Power Capacity: Rated up to 10,000kW, suitable for large compressors, motors, fans, and water pumps

• Multiple Control Modes: V/F Control, Sensorless Vector Control (SVC), Flux Vector Control (FVC), PWM Control, and PID Control — enabling precise adaptation to different load characteristics

• High Efficiency: 96% operating efficiency, significantly reducing energy losses during continuous operation

• Reliable Output Performance: Rated output current of 650A, with a maximum output current of 779A (60s overload capacity) to handle demanding startup and load conditions

• Wide Frequency Range: 0–600Hz output frequency for flexible speed regulation

Key Results

• Stable operation of large medium-voltage motors across compressor, fan, and pump applications

• High energy efficiency (96%) contributing to lower long-term operating costs

• Reduced mechanical stress on motors through smooth start/stop and precise speed control

• Reliable performance validated under CE certification, complying with EU standards

Technical Specifications

The Wolong WD5100 series demonstrates strong performance in medium voltage applications requiring both high power capacity and precise control. With multi-voltage compatibility and flexible control modes, it is well-suited for compressors, pumps, fans, and other heavy industrial motor-driven equipment across sectors such as mining, metallurgy, power generation, and petrochemicals.