Development on rare-earth permanent-magnet generator with vacuum pump for vehicle

Therare-earth permanent-magnet generator with vacuum pump is mainly used to provide direct current for the vehicle electro-equipment,charge the storage battery and provide vacuum energy for the brake system.Many blocks of Nd-Fe-B permanent-magnet material are fixed on the generator's rotor with polishes and nonmagnetic bolts,the adjoining permanent-magnet material's polarity is opposite.Three-phase half-wave controlled commutation voltage regulator is invented,which can both regulate the voltage and the current,output direct current with stable voltage.The problem of instable voltage which generated by the vehicle's permanent-magnet generator at wide speed and wide load is solved.