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Rotating electrical machine for vehicle
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A technology for rotating electrical machines and vehicles, which is applied in the direction of motors, electrical devices, collectors, etc., to achieve the effect of increasing strength
Active Publication Date: 2017-08-08
DENSO CORP
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Abstract
Description
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Problems solved by technology
[0018] Thus, there is a problem that the minimum wall thickness T must be set large to obtain necessary strength
Method used
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no. 1 approach
[0044] will refer to Figure 1 to Figure 4 A rotating electrical machine for a vehicle according to a first embodiment of the present invention will be described.
[0045] The vehicle rotating electric machine of the first embodiment is an application of the present invention to a vehicle AC generator 1 (hereinafter simply referred to as AC generator 1 ) mounted on a vehicle and used as a generator.
[0046] Such as figure 1 As shown, the AC generator 1 includes a casing 10 , a rotor 20 , a stator 30 , a field coil power supply mechanism 40 , a rectifier 50 , a rear cooling fan 61 , a front cooling fan 62 and the like.
[0047] The casing 10 includes a bottomed cylindrical front casing 11 and a rear casing 12, both of which are open at one end.
[0048] The front case 11 and the rear case 12 are fastened with bolts 13 in a state where openings are connected to each other.
[0049] The rotor 20 is rotatably arranged inside the stator 30 in the radial direction, and is integ...
no. 2 approach
[0107] refer to Figure 5 and Figure 6 , the second embodiment of the present invention will be described.
[0108] In the first embodiment described above, the cross-sectional shapes in the thickness direction of the first cooling hole 56 and the second cooling hole 57 are formed to be the same size and formed uniformly, while in the second embodiment, the first cooling hole The cross-sectional shapes in the thickness direction of 56A and the second cooling hole 57A are formed to be non-uniform in size.
[0109] That is, similarly to the first embodiment, the first cooling hole 56A and the second cooling hole 57A of the second embodiment have a circular cross-sectional shape on a plane orthogonal to the thickness direction.
[0110] However, the diameter d1 of the small-diameter side end and the diameter d3 of the large-diameter side end of the cooling holes 56A and 57A are different from each other.
[0111] According to the second embodiment, the same functions and effe...
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Abstract
An AC generator (1) for a vehicle includes a housing (10) having an inlet (15) and an outlet (16), a stator (30)fixed to the housing(10), a rotor (20)disposed inside of the stator(30), a cooling fan (61)fixed to a rotor(20), one or more cooling fins(51,53) disposed in an air flow passage of a cooling air, and a rectifying element(54) for rectifying an AC voltage generated by a stator winding(32). A positive-side cooling fin (53)has a plurality of tapered first and second cooling holes (56,57)penetrating in a thickness direction and serves as the air flow passages of the cooling air. Tapering directions of tapered surfaces extending in the thickness direction of each cooling hole in at least one pair of adjacent first and second cooling holes are reversed in the thickness direction with respect to each other.
Description
technical field [0001] The present invention relates to a rotary electric machine for a vehicle that is mounted on a vehicle such as an automobile or a truck and used as a motor, generator or generator motor. Background technique [0002] An AC generator having an armature coil and a field coil is generally known as one type of existing rotary electric machines for vehicles. [0003] The AC generator includes: a rectifier having a rectifying element for rectifying an AC voltage formed by an armature coil; and cooling fins to which the rectifying element is fixed. [0004] Cooling air is generated by a cooling fan fixed to a rotor of the AC generator and rotated integrally with the rotor of the AC generator, and while the cooling air is guided to the generator housing through an inlet provided at the rear end wall of the generator housing , so that the cooling air contacts the rectifier elements and cooling fins. [0005] Next, the cooling air cools the inside of the genera...
Claims
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Application Information
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