An Understandable and Cost-Efficient Design: A permanent magnetic field is created in the stator, or stationary section, of the motor by either irreversible magnets, which prevail in fractional horse power applications, or electromagnetic windings, which are made use of in applications that need five or even more horse power.
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Load Control: The load, or torque, control is easy. The output torque is proportional to the current, so if you limit the existing, you restrict the twist it could take. This is one reason these DC engines are utilized for applications such as textile production.