Inverter efficiency vs. torque at 120Vac input for motor speeds 5k-30k rpm

Inverter efficiency vs. torque at 240Vac input for motor speeds 5k-30k rpm

Notes:

• All measurements taken at room temperature.
• Line voltage is nominal value, actual line voltage varied with load.
• Line frequency was 60Hz.
• Electrical power measured with Yokogawa WT1600.
• Mechanical power measured with Magtrol WB43.