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The KBWS PWM (pulse width modulated) controls are
designed to operate PWM and SCR rated Permanent Magnet
motors ranging from 1/50 HP to 11/2 HP. They operate at a
switching frequency greater than 16 kHz to provide high motor
efficiency and quiet operation. Another advantage of PWM is
higher output voltage (up to 130 Volts DC for 115 Volt AC line
and 220 Volts DC for 208/230 Volt AC line) which provides
increased motor speed.
The KBWS contains pulse-by-pulse current sensing, which
provides short circuit protection and prevents control damage
due to commutator arcing. Permanent magnet motor demagnetization
is completely eliminated because current peaks are
reduced to safe levels. The controls contain an AC line inrush
current limiter (ICL) which reduces the AC line surge current during
startup.
Standard features of the KBWS include diagnostic LEDs
(Power On and Current Limit) and adjustable trimpots
(Maximum Speed, Minimum Speed, Acceleration, Deceleration,
Current Limit and IR Compensation). Also provided is a connector
for an Inhibit Switch and quick-connect terminals for AC
line, motor armature and Main Speed Potentiometer. The Plug-
In Horsepower Resistor® matches the motor characteristics to
the control which eliminates the need to recalibrate the Current
Limit (CL) and IR Compensation (IR) trimpots.
The KBWS contains built-in isolation for all inputs. This
includes signal voltage, Main Speed Potentiometer, Inhibit
Circuit and +5VDC Power Supply. The dual voltage models
contain a jumper to select motor voltage and special circuitry
which automatically accepts AC line input voltages of 115 or
208/230 Volts AC without having to make a jumper selection.
Optional accessories for the KBWS include a DIN Rail
Mounting Kit, a Product Safety Module (PSM) and an AC Line /
Armature Fuse Kit.
Download the KBWS
specification sheet in *.pdf format
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