Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1998-06-25
2000-01-04
Ramirez, Nestor
Electrical generator or motor structure
Dynamoelectric
Rotary
310 71, 310 43, H02K 304
Patent
active
060113391
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an electric motor mounted in a vehicle, such as a passenger car or truck.
PRIOR ART
In a vehicle such as a passenger car or truck, various motors are mounted such as a motor mounted on an engine and a motor for driving a wiper.
The motor mounted in the vehicle has a cylindrical stator and a rotor rotatably mounted at the central area of the stator in which the rotor is equipped with a permanent magnet and produces a rotational force under a magnetic field created by the stator.
In the stator of the motor mounted in the vehicle, use is made, as a structure for forming coils for creating magnetic fields, of cylindrical ring sections arranged coaxially with a rotor and a plurality of projections equidistantly mounted on, and along a circumferential direction of, the cylindrical ring unit and directed at their forward ends toward the rotor side with each projection wound with a winding such as a copper wire. A magnetic field is created by carrying electric current in the windings of these coils through lead wires from an external source.
In this case, the end of the winding constituting the coil is connected to the end of the lead wire in the following way. That is, the end of the winding is soldered to the end of the lead wire and the ends of the winding and lead wire are tied together by a band, etc., along the stator and fixed together and then bonded with a varnish, etc. They may also be connected and fixed through a PC board, etc.
If, as set out above, the end portions of the copper wire and lead wire are tied together and fixed or they are fixed together through the PC plate, there is sometimes a chance that their fixed areas are disconnected due to a vibration resulting from the running of the vehicle. As a result, the problem arises because of lowered vibration resistance and impact resistance in the vehicle. Further, for the former method it is necessary to tie together the end portions of the winding and lead wire during manufacturing of the vehicle motor. This operation is time-consuming and tedious.
As shown in FIG. 1, on the other hand, a winding 104 is formed with a coil 103 provided around a projection 102 of a ring section 101 of a stator 100 and it may also constitute a winding 105 having a copper wire circular in cross-section or a length of a flat band-like copper wire as shown in FIG. 2.
For the winding 104 comprised of a copper wire as shown in FIG. 1, interstices are created among the adjacent copper wire portions and this presents the problem of the winding 104 being reduced in its space occupation percentage. For the winding 105 comprised of the flat band-like copper wire as shown in FIG. 2, there is less space between the adjacent band-like portions. For a winding 105 with one terminal end portion 105a of its turned section exposed to an outside as shown in FIG. 3, an initial end portion 105b is hidden at the inside of the turned section around a projection 102 and it is difficult to achieve the soldering of a lead wire's end portion externally.
The rotor, on the other hand, comprises a cylindrical section having a plurality of sector-like permanent magnet pieces formed of ferrite magnets and combined into a cylindrical unit and a rotation shaft fixed at the center of the cylindrical section.
Even if the motor in the vehicle is to be so made as to have high efficiency and high output level, the rotor using the ferrite magnet is limited in terms of the magnetic strength of the ferrite magnet. It may be possible to improve the magnetic strength using, for example, the rare earth magnet in place of the ferrite magnet. The rare earth magnet is higher in cost than the ferrite magnet and, if the rare earth magnet is used for the rotor of the motor in the vehicle, then the manufacturing cost becomes expensive.
DISCLOSURE OF THE INVENTION
An object of the present invention is to provide a motor mounted in a vehicle, which is excellent in its vibration resistance and in its impact resistance.
Another object of the present invention is to p
REFERENCES:
patent: 2961555 (1960-11-01), Towne
patent: 3979822 (1976-09-01), Halm
patent: 4127786 (1978-11-01), Volkrodt
patent: 4131988 (1979-01-01), Finegold
patent: 4625135 (1986-11-01), Kasabian
patent: 5066880 (1991-11-01), Banon
patent: 5397951 (1995-03-01), Uchida et al.
Dinh Le Dang
Ramirez Nestor
Shibaura Engineering Works Co. Ltd.
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