While engine speeds and electrical loads change, the alternator's output must remain even - not too much, nor too little.

The regulator controls alternator output by increasing or decreasing the strength of the rotor's magnetic field. It does so, by controlling the amount of current from the battery to the rotor's field coil.

The electromechanical regulator does its job with a magnetic coil and set of contact points. The IC regulator does its job with diodes, transistors, and other electronic components.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

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