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US 4,739,204 AGranted
Liquid cooled a.c. vehicle generator
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsYutaka Kitamura, Kazutoshi Kaneyuki, Yoshiyuki Iwaki, Hiroaki Aso
Life of this patent
Estimating the term…
Abstract
A vehicle mounted a.c. generator includes an annular water coolant passage 32b around a stator coil 11 and a branch coolant passage 32c extending from an inlet portion of the annular coolant passage to a return portion thereof. An air circulation fan 60 may also be provided inside a front bracket 26 of the generator. Various embodiments include supplemental heat pipes and bearing coolant passages.
Claims16
A vehicle mounted a.c. generator, comprising:
- a rotor shaft adapted to be driven by a vehicle engine;
- a rotor core (22) fixedly secured to said shaft and adapted to be excited by an exciting coil (9);
- a stator core (10) disposed opposite an outer periphery of said rotor core and mounting a stator coil (11);
- a sealing member (24) enclosing at least a rear portion of the stator coil;
- a front bracket (26) and a rear bracket (30) sealingly joined together to define a housing supporting said stator core directly and said rotor shaft indirectly through bearings (14, 15);
- a rectifier (16) for rectifying an output voltage generated by said stator coil;
- a voltage regulator (17) for regulating an output voltage of said rectifier to a predetermined value;
- at least one annular coolant passage (32b) formed between said sealing member of the stator coil and said rear bracket;
- and a branch coolant passage (32c) formed along an end surface of said rear bracket, said stator coil, said rectifier and said voltage regulator being cooled by circulating a liquid coolant through said coolant passages.
6 more elements
A vehicle mounted a.c. generator, comprising:
- a rotor shaft adapted to be driven by a vehicle engine;
- a rotor core fixedly secured to said rotor shaft;
- an exciting coil (9) disposed opposite an inner periphery of said rotor core for magnetizing a rotor armature;
- a stationary core (23) for supporting said exciting coil;
- a stator core (10) disposed opposite an outer periphery of said rotor core and mounting a stator coil (11) thereon;
- a sealing member (24) enclosing at least a rear portion of the stator coil;
- a front bracket (26) for supporting one end of said stator core directly and said rotor shaft indirectly through a bearing (14);
- a rear bracket (30) for supporting the other end of said stator core and said sealing member directly and said rotor shaft indirectly through a bearing (15), said stationary core being fixedly secured to said rear bracket;
- a cooling cover (33) for covering a side end surface of said rear bracket to form, together with said rear bracket, a branch coolant passage (32c);
- a rectifier (16) mounted to an outer periphery of said cooling cover;
- a voltage regulator (17) mounted to said outer periphery of said cooling cover;
- high thermally conductive members (51) thermally coupling said stationary core through said rear bracket to said branch coolant passage;
- an annular coolant passage (32b) formed between said sealing member of the stator coil and said rear bracket for cooling said stator coil;
- said branch coolant passage cooling said rectifier, said voltage regulator and said exciting coil.
11 more elements
A vehicle mounted a.c. generator, comprising:
- a rotor shaft adapted to be driven by a vehicle engine;
- a rotor core fixedly secured to said rotor shaft;
- an exciting coil (9) disposed opposite an inner periphery of said rotor core for magnetizing a rotor armature;
- a stationary core (23) for supporting said exciting coil;
- a stator core (10) disposed opposite an outer periphery of said rotor core and mounting a stator coil (11) thereon;
- a sealing member (24) enclosing at least a rear portion of the stator coil;
- a front bracket (26) for supporting one end of said stator core directly and said rotor shaft indirectly through a bearing (14);
- a rear bracket (30) for supporting the other end of said stator core and said sealing member directly and said rotor shaft indirectly through a bearing (15), said stationary core being fixedly secured to said rear bracket;
- a cooling cover (33) for covering an end surface of said rear bracket to form, together with said rear bracket, a branch coolant passage (32c) for cooling a rectifier (16) and a voltage regulator (17) mounted on said cooling cover, and said exciting coil;
- a coolant passage (23a) formed in said stationary core and extending through said rear bracket to said branch coolant passage;
- and an annular coolant passage (32b) formed between said sealing member of the stator coil and said rear bracket for cooling said stator coil.
8 more elements
Dependencies are inferred from the claim text.