Patent ID: 6359352
Filing Date: 2002-03-19
Classification: H01L,H02K,H02M

Abstract:
A vehicular AC generator comprising:first and second Y-shaped three-phase connection stator windings having a Y-connection formed on a common stator core such that a pair of three windings have a phase difference of 30Â° from each other, each of the pair of windings being accommodated in separate slots of the common stator core; and a rectifier device comprising a first rectifier for rectifying and outputting a phase current derived from an end of each winding of the first Y-shaped three-phase connection stator winding and a neutral-point current derived from a neutral point of the first stator winding and a second rectifier for rectifying and outputting a phase current derived from an end of each winding of the second Y-shaped three-phase connection stator winding and a neutral-point current derived from a neutral point of the second stator winding, the first and second rectifiers each generating a synthesized output at an output terminal; wherein the first and second Y-shaped three-phase connection stator windings have the same physical characteristics as each other, such that the phase current derived from the first Y-shaped three-phase connection stator winding equals the phase current derived from the second Y-shaped three-phase connection stator winding; wherein the first and second rectifiers each have phase-current rectifying diodes and neutral-point-current rectifying diodes disposed on a common heat sink; and wherein the neutral-point-current rectifying diodes of the first and second rectifiers are disposed on the heat sink at locations next to a phase-current rectifying diode which will reach the highest temperature among the phase-current rectifying diodes.