PRO-150 V1.0 11/18
Page 8
www.4qd.co.uk
Cable routing
It is very important to keep the B+ and B- wires as short as possible and to route
them next to each other. Long battery leads can cause the main capacitors to
overheat and will result in increased levels of interference being emitted.
Motor wires should also be kept as short as possible and should be twisted
together where possible to minimise radiated electrical noise. We also recommend
fitting appropriate suppression components [search for suppression on our website
for details].
Motor Types
The Pro-150 is designed for use with permanent magnet DC motors, but can also
be used with shunt wound motors.
Remember that motors are generally rated in terms of continuous current handling:
for a typical motor the short term current (1 minute rating) may be 3 or 4 times as
much as continuous rating.
Use only good quality motors with brushes and commutator in good condition: worn
brushes and commutators can cause arcing (electrical noise) which can cause
controller failure.
Battery Type
The Pro-150 is designed for use with rechargeable batteries of 24V to 48V nominal.
The actual supply voltage can be between 16V and 55V. This allows room for
droops or peaks in battery voltage under hard acceleration or braking.
Be aware that the Pro-150 feeds current back to the battery during braking, so if
the battery is sensitive to over-charging (such as Li-ion) consider what will happen
if regen braking occurs when the battery is fully charged.
Fuse or Circuit breaker
Suitable fuses, circuit breakers, and battery isolators must be fitted.
