Motor sizing and load profile for this 750 W drive
The FR-D740-022SC-EC is a 750 W (1 HP) VFD rated for 2.2 A continuous output — sized for a standard 0.75 kW induction motor on a conveyor, pump, or fan in constant- or variable-torque duty. Input voltage is 380–400 V, 3-phase at 50/60 Hz — the common European 400 V industrial grid; output frequency goes to 400 Hz, so it can drive high-speed spindles or centrifuges beyond the usual 50/60 Hz motor base speed.
Panel fit and I/O complement
Panel-mount footprint: 108 mm wide, 128 mm tall, 129.5 mm deep — fits a standard small-cabinet cutout; IP20 means it needs an enclosure for dust and moisture protection. Built-in MODBUS RTU over RS485 for PLC control without an external gateway; 5 digital inputs (24 VDC), 1 relay output (change-over, 250 VAC), and 1 analog output (0–10 VDC) cover basic start/stop, speed reference, and status feedback.
Carrier frequency and derating
Carrier (PWM) frequency adjustable from 2 kHz to 14.5 kHz — running above 4 kHz reduces audible motor noise but derates the continuous output current; for a 2.2 A drive, expect roughly 20 % derate at the top of the range.