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A Variable-frequency Drive (VFD) is a power control device that integrates frequency conversion technology with microelectronics technology. It achieves precise control of an AC motor by altering the frequency of the motor's power supply.
The internal structure mainly consists of components such as rectification, filtering, inversion, braking units, drive units, detection units, and microprocessor units. The core relies on the switching of internal IGBTs (Insulated Gate Bipolar Transistors) to dynamically adjust output voltage and frequency.
| Power Rating | 1~800kw | |
|---|---|---|
| Item | Technical Index | Specification |
| Input | Input Voltage | 1AC 220V±15% / 3AC 380V±15% |
| Input Frequency | 50/60Hz±5% | |
| Output | Output Voltage | 0~Rated Input Voltage |
| Output Frequency | 0~500Hz | |
| Control Features | Control Mode | V/f control, Sensorless vector control, Torque control |
| Overload Capacity | 150% / 60s, 180% / 10s, 200% / 1s | |
| Starting Torque | 0.25Hz/150% (SVC); 0.5Hz/150% (V/f) | |
| Speed Precision | ±0.5% (V/f), ±0.2% (SVC) | |
