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The Walker - a miniature 40 amp speed controller

The latest controller from the 4QD stables.
ready soon (spring 2009)!

The Walker is the latest controller from 4QD: it uses microprocessor technology to minimise not only the size but also the price.

Wiring is very simple and the same controller will work on any voltage battery from 12v to 48v.

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Provisional specification.

Supply voltage12V-48V battery
Output voltage0%-100% of supply
Undervolt threshold9V
Supply current (zero speed)20mA
Output current limit40A
Voltage drop at 20A150mV
Thermal cutout80ºC on PCB
Switching frequency16kHz
Acceleration time1s
Deceleration time2s
Control input10K pot
Dimensions65mm x 50mm x 34mm plus tabs

A separate page shows the wiring for the Walker controller.
Instruction manual is available.


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© 2009 4QD
Page's Author: Richard Torrens
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