The car generator is the main power source of the car. Its function is to supply power to all the electric equipment (except the starter) while the engine is running normally (idle speed), and charge the battery at the same time. Automotive generators With the advancement of automotive technology, the power consumption of automobiles is getting higher and higher. Twenty years ago, the output power of the mid-size car was only about 500 watts. Now the average mid-size car generator is about 1000 watts. The increase in generator power is increased as the number of electrical equipment on the vehicle increases. Now the generators on the car are air-cooled generators, and the fan behind the pulleys blows into the casing for cooling. Under the constraints of the existing air-cooled generator construction, the increase in power will inevitably lead to an increase in the volume of the generator.