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An electric motor refers to an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction.
The motor is represented by the letter M in the circuit (formerly D in the old standard), and its main function is to generate driving torque as a power source for electrical appliances or various machinery. The generator is represented by the letter G in the circuit, and its main function is to convert mechanical energy into electrical energy.
working principle:
The direction of force acting on a conductor is determined by the left-hand rule. This pair of electromagnetic forces forms a torque acting on the armature, which is called electromagnetic torque in a rotating motor. The direction of the torque is counterclockwise, attempting to make the armature rotate counterclockwise. If this electromagnetic torque can overcome the resistance torque on the armature (such as the resistance torque caused by friction and other load torques), the armature can rotate counterclockwise.
DC motor is an electric motor that operates on DC working voltage and is widely used in recorders, video recorders, DVD players, electric shavers, hair dryers, electronic watches, toys, etc.