4QD Motor Speed Controller
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4QD Motor Speed Controller
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Hopefully you read the bit on permant magnet motors first?
The controller 'merely' varies the voltage applied to the motor - but it actually has to do much more than that.
A stalled motor can take about 20 times its rated running current: if you suddenly switch the battery to the motor there is an initial surge nearly this high. If the motor ever tried to take this high current, even for an instant during starting) it would instantly blow the controller, so the controller needs to be protected against this.
Then you may want the controller to reverse the motor: to do this safely it first has to stop the motor - for it is hardly desirable to simply reverse it at full speed.
Then there is reverse polarity protection, protection against operator misuse, regenerative braking, safe response in case of broken wires etc. Some applications require some features, some do not. If you follow the 'next' links at the bottom of this set of linked pages we will take you through an simple explanation of the features we offer on our controllers, and hopefully 'bust some of the jargon' surrounding the subject.
Unfortunately chosing a controller can get pretty technical so, if you are new to it there may be quite a lot to read! Have a look through this 'guided features tour, then read our controller FAQ sheet.
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