Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1998-06-23
2000-06-27
LaBalle, Clayton
Electrical generator or motor structure
Dynamoelectric
Rotary
310 71, 310 67R, 310 68R, 310 68B, 310 68F, 310 68E, 310 68C, 310 68A, 310 75A, 310 43, 310254, H02K 500
Patent
active
060810564
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a motor, which is used as a drive source for a device provided with an electric motor for an electric scooter, an electric vehicle or the like, and also a method of manufacturing it.
BACKGROUND ART
Vehicles such as electric scooters and electric vehicles not having an internal combustion engine are being developed in these years. A motor as the drive source for such vehicles is housed in a metallic casing to protect its interior.
This casing is formed of a case and a cover both made of metal such as aluminum. After placing the component parts of the motor in the case, the cover is mounted, and the case and the cover are assembled by means of bolts. In this case, a control system for controlling to drive the motor is formed on the exterior of the casing.
Since the motor configured as described above generally has the control system on the exterior of the casing, there are drawbacks as described below.
For example, when the motor is mounted on a scooter body, the motor and the control system must be mounted separately. Besides, they have to be connected mutually with cables accurately, and this wiring work is very troublesome.
Besides, since the motor and the control system must be mounted separately, it is necessary to provide a space for the motor, a space for the control system, and a space for the cables to connect them.
Especially, since the control system has a heating element, a radiating part is needed for the control system in addition to a radiating part (heat sink) for the motor. Therefore, a large space is required therefor.
In addition, the cables connecting the motor with the control system are readily damaged when they are fitted to the scooter body or when the scooter is running.
On the other hand, the motor may be entirely molded with resin instead of a metallic assembling casing to have the molded resin as the casing. But, there are disadvantages that radiation is poor because of the resin, and a mechanical strength is degraded.
In view of the above, the invention is to provide a compact and reliable motor, which is assembled and mounted with ease and also a method of manufacturing it.
SUMMARY OF THE INVENTION
The invention relates to a motor, which comprises a drive system which has a stator and a rotor, and a control system which controls the drive system and has circuit boards, both being housed in a casing, wherein the casing has a first conductive pin for flowing an input current to the control system and a second conductive pin for flowing an output current from the control system to respective phases of a coil, and the circuit boards are supported by the first and second conductive pins.
Therefore, the number of parts is reduced and the mounting space is small according to the invention as compared with a case where the members for fixing the circuit boards and the cables for electrically connecting the power source and the control system are used. Accordingly, the motor can be made compact. Besides, since the parts are stacked and fixed from one direction, assembling can be made automatically, and assembling itself is facilitated.
And, the invention relates to a motor, which comprises a drive system which has a stator and a rotor, and a control system which controls the drive system and has circuit boards, both being housed into a casing, wherein the control system has a board and a plurality of switching elements which are arranged in the form of a ring and mounted on the board.
Therefore, the plurality of switching elements can be mounted on a small area, so that the circuit board can be made small, the control system can be made small without increasing a surge voltage, and the motor can be made compact as a result.
Besides, the invention relates to a method of manufacturing a motor, which comprises the steps of using a first die and a second die which are mutually connected with a die split face therebetween and using a third die which is inserted in the middle of the first and second dies, inserting and fixing a motor stator, a me
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Ishiguro Akiyoshi
Sato Michio
Shinkawa Osamu
Tabata Kunio
Takagi Kunihiko
LaBalle Clayton
Lam Thanh
Seiko Epson Corporation
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