The difference between high-voltage VFD and low-voltage VFD

1、 Power Range：

The power of high-voltage VFD is usually between several hundred kilowatts and tens of thousands of kilowatts, while the power range of low-voltage VFD is generally between several hundred watts and several hundred kilowatts.

2、 Structural Design：

High voltage VFD have high voltage and high power, complex internal circuit structures, and usually use multi-level inverter technology to reduce the stress on components under voltage. They also require specialized high-voltage insulation measures and heat dissipation systems. Low voltage VFD have a relatively simple structure and often use two-level or three-level inverter circuits, making it relatively easy to solve heat dissipation and insulation problems.

3、 Control accuracy:

High voltage VFD are used in industrial large-scale equipment where high speed regulation accuracy is required, typically possessing high control accuracy and dynamic performance; Although low-voltage VFD can also meet certain speed regulation requirements, but in some high-precision control situations, additional configurations may be required to achieve control accuracy similar to high-voltage VFD control accuracy.

4、 Price cost:

High voltage VFD are relatively expensive due to their complex technology, manufacturing difficulty, and the need for supporting high-voltage electrical equipment; Low voltage VFD are relatively inexpensive and more suitable for small businesses and low-power equipment in general industrial applications.