AC Motor Control TRIZ Cases
- Inverter Switch Control with Variable Carrier Frequency
Variable carrier frequency matched to motor speed and torque cuts inverter switching losses and DC link voltage ripple without larger capacitors.
- Inverter Phase Voltage Diagnosis for Switch Faults and Phase Loss
Uses a stable intermediate output voltage in the off state to detect inverter switch faults and motor phase loss without inrush current.
- Interconnected Inverter Synchronization Without Extra A/D Ports
Electrical angle information from an RDC lets the inverter sync to the AC line without adding an A/D port, cutting conversion cost.