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    'Soft starting' a DC motor

    Ahhh thanks Resqueline, that makes sense, there is a 4-stage epicyclic gearbox between the motor and output shaft, the efficiency loss will be due to this. The load is linear and I have calculated that the load requires less than 400N (using several 'worst-case' scenarios) to accelerate the...
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    'Soft starting' a DC motor

    Think it will get to that poor mystic. Another electronics forum has suggested a PWM driver that should do significantly more than what I want it to do and is rated at 50amps so I'm going to invest in that, do some trials and see exactly what my start and run currents are and then I will have...
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    'Soft starting' a DC motor

    poor mystic, yes the problem with back emf does appear to be critical to successful application. I am convinced that there is a unit out there that will do exactly what I want to achieve. RS advertise a circuit but apparently it is out of stock and may not actually come back into...
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    'Soft starting' a DC motor

    Hi, The motor is to move a load weighing 600kgs but I would like it to have capacity to move 1200kgs. With help from a uni-buddy we have worked out that based on rolling resistance and the size of drive-wheel, it will require about 22Nm of torque to move the load. I have included the motor url...
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    'Soft starting' a DC motor

    Hi all, fairly new to messing about with electronics so please bear with me I need a control device to in effect 'soft-start' a 24v DC permanent magnet motor rated at 375w and 22.5A and don't really know how to go about it. If the motor is rated at 22.5A, what will it draw on start-up? To my...
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