4pk 775

To grasp the importance of belts in stepper motor systems, it is crucial first to understand how these motors operate. A stepper motor consists of multiple coils organized in phases. When electrical currents flow through these coils sequentially, they create magnetic fields that pull on the rotor—a component magnetized to respond to these fields. Each sequence of the current flow corresponds to a specific movement, or “step”, of the rotor. By controlling the sequence and frequency of the current supplied, precise control over rotation speed and position can be achieved.


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As the engine cranks, the rotational energy is transmitted through the PK belt to the alternator pulley. This rotation causes the rotor inside the alternator to spin, inducing a magnetic field. According to Faraday’s law of electromagnetic induction, this spinning magnetic field generates electrical current in the stator windings of the alternator. The result is an output of alternating current (AC), which is then converted into direct current (DC) through a built-in rectifier. This DC power is what charges the vehicle’s battery and powers the electrical systems.


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