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Before we can examine the function of a drive, we must understand the basic operation of the motor . It is used to convert the electrical energy, supplied by the controller, to mechanical energy to move the load . There are really two types of motors, AC and DC . The basic principles are alike for both . Magnetism is the basis for all electric motor operation . It produces the force required to run the motor . There are two types of magnets the permanent magnet and the electro magnet . Electro magnets have the advantage over permanent magnet in that the magnetic field can be made stronger . Also the polarity of the electro magnet can easily be reversed . The construction of an electro magnet is simple . When a current passes through a coil of wire, a magnetic field is produced .
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