What is the most common VFD?
Common VFD types include:
PWM inverter: PWM (pulse width modulation) inverter controls the output voltage and frequency by changing the pulse width of the power supply to control the speed of the motor.
V/F inverter: V/F (voltage/frequency) inverter controls the speed of the motor by adjusting the ratio of output voltage and frequency, and is usually used for simple applications.
Vector control inverter: Vector control inverter achieves more precise speed control by monitoring parameters such as motor current, speed and position, and is suitable for applications that require high performance and precision control.
Direct torque control inverter: Direct torque control inverter achieves faster and more precise response by directly controlling the torque of the motor, and is usually used in applications that require high dynamic performance.
Multilevel inverter: Multilevel inverter improves the efficiency and smoothness of the motor by using multiple voltage levels to reduce the harmonics of the output voltage.
These are some common inverter types, and the specific choice depends on the requirements and budget of the application.