Phase 23: VFD, Soft Starter & AC Drives
This phase contains 6 sections and 43 checklist topics. Use the interactive phase page to track your own learning progress.
Before VFD
- Hard starter
- DOL
- Star-delta
- Soft starter
- Soft starter limitation
VFD fundamentals
- What is VFD?
- Why use VFD?
- Frequency control
- Speed control
- Torque
- Energy saving
Learn
- PWM
- V/f control
- Vector control basic
- Acceleration
- Deceleration
- Minimum frequency
- Maximum frequency
- Motor current
- And 3 more checklist topics
Control
- Keypad
- Digital inputs
- Analog input
- 0-10 V
- 4-20 mA
- PLC digital control
- PLC analog control
- Network control
Communication
- Modbus
- PROFINET
- EtherNet/IP depending brand
Troubleshooting
- Overcurrent
- Overvoltage
- Undervoltage
- Overtemperature
- Ground fault
- Motor overload
- Communication fault
- Wrong motor parameters
- And 2 more checklist topics