LIANCHUANG GAOKE AUTOMATION
OEM equipment manufacturers can customize the frequency converters that you prefer and install them on your products.
SHANDONG LIANCHUANG GAOKE AUTOMATION CO.,LTD.
Types and Applications of Industrial Frequency Converters
Release date:
2026-04-23
Industrial frequency converters are mainly classified into three categories: low-voltage, medium-voltage and high-voltage. They are widely used in scenarios such as motor speed regulation, energy-saving control and precision drive.
1. Classification by Voltage Level
Type Voltage Range Typical Applications
Low-voltage Inverter <1kV (e.g., 380V/480V) Pumps, fans, conveyors, HVAC systems
Medium-voltage Inverter 1kV~10kV Mining, metallurgy, large compressors
High-voltage Inverter >10kV Power plants, petrochemicals, large ship propulsion
2. Classification by Topology
Voltage Source Inverter (VSI): Uses IGBTs, high efficiency, suitable for most industrial applications.
Current Source Inverter (CSI): Ideal for low-speed, high-torque scenarios like heavy rolling mills.
Matrix Inverter: No DC link required, high energy conversion efficiency, but higher cost.
3. Classification by Application
General-purpose Inverter: For variable torque loads like fans and pumps, supports V/F control, cost-effective.
Special-purpose Inverter: Designed for elevators, injection molding machines, with dedicated protection and control logic.
Servo Inverter: Used in robots and CNC machines for high-precision motion control, supports vector control or DTC.
4. Main Applications
Energy Saving: In fan and pump systems, speed regulation replaces valve throttling, achieving energy savings of 30%~50%.
Soft Start/Stop: Reduces starting current to below 1.2 times rated current, minimizing mechanical stress and extending equipment life.
Process Optimization: Enables millimeter-level precision in lithium battery rolling or packaging machinery.
System Integration: Supports communication protocols like Profinet and Modbus, enabling integration into MES/SCADA systems for intelligent monitoring.
BLOGS
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