LEESON FHP Series NEMA 4x Variable Speed Drive - Manual (Page 3)

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The LEESON FHP Series Drives are solid state, variable-
frequency AC motor drives. The FHP Series utilizes a 115
or 230 VAC, 50/60 Hz, single-phase input, and is
factory calibrated for an output of 0 to 60 Hz. They
will operate any 1.5 HP or smaller, 208/230-volt three-
phase-AC-induction, single-phase permanent split capacitor
motor (see page v) and can be user calibrated for 0 through
120 Hz output.
Although FHP Series inverters can operate over their full
speed
range, most motors will operate with constant torque
over a
10:1 speed range, 6 Hz to 60 Hz, and constant
horsepower
above 60 Hz. (Inverter-duty motors may operate
satisfactorily over a 20:1 speed range.) Some motors can
be satisfactorily operated at speeds as low as 50 rpm
(speed range 50:1). Below 50 rpm, some motors may
show signs of “stepping” or “cogging”, and may run warmer.
*Although the FHP Series will allow a minimum of 0 Hz, the actual minimum
frequency is dependent on motor type and load. The motor may need to be
derated for low-frequency (30 Hz and lower) operation. Please consult the
motor manufacturer.
General Information