Variable Frequency Drive, Soft Starter
Categories:
Motor ControlsDescription
Variable Frequency Drive (VFD):
A VFD controls the speed and torque of the conveyor motor by varying the frequency and voltage supplied to the motor. It provides smooth start/stop, energy savings, and precise speed control.
Soft Starter:
A Soft Starter gradually increases the voltage during motor startup, resulting in reduced inrush current and mechanical stress. It is used when only soft start and stop are needed, but not speed control.
Specifications
Variable Frequency Drive (VFD):
- Application: Speed control with soft start capability
- Motor Rating: Example 7.5 kW, 230V, 3-phase
- Input Voltage: 3-phase, 380–480V AC, 50/60Hz
- Output Frequency: 0–60 Hz or more
- Control Type: PWM (Pulse Width Modulation)
- Protection: Overload, Overvoltage, Undervoltage, Phase Loss, Short Circuit
- Control Interface: Keypad, Digital, Analog, RS485, Modbus
- Braking Function: Optional dynamic braking
- Speed Control: Precise and adjustable
- Start/Stop Ramp: Fully configurable acceleration and deceleration
- Energy Saving: Yes, especially at lower speeds
- Installation: Wall-mounted or panel-mounted
- Environmental Rating: IP20 / IP54 / IP65 options
- Cooling: Built-in fan or heatsink
Soft Starter:
- Application: Soft start only (no speed control)
- Motor Rating: Same as VFD (e.g., 7.5 kW, 230V, 3-phase)
- Input Voltage: 3-phase, 380–480V AC, 50/60Hz
- Output Frequency: Line frequency (50/60Hz)
- Control Type: Voltage ramp control
- Protection: Overload, Phase Loss, Overtemperature
- Control Interface: Selector switch or digital input
- Braking Function: Not available
- Speed Control: Not available
- Start/Stop Ramp: Limited ramp control
- Energy Saving: Not available
- Installation: Panel-mounted
- Environmental Rating: IP20 / IP54 options
- Cooling: Natural or forced air