To make the noise level of a motor drive device constant between individual devices with a simple structure which is easy to manufacture.
The motor drive device comprises a motor casing MC, a stator S, and a rotor R. A gap is provided between the inside circumferential surface MRs of the motor casing MC and the outside circumferential surface of the stator S. This stator S is fixed to the motor casing MC with the stator S pressed to one side of the radial direction in such a manner that a prescribed contact portion p3 set up inside a specific phase region U in the circumferential direction on the outside circumferential surface of the stator S contacts the inside circumferential surface MRs of the motor casing MC. A manufacturing method of the motor drive device includes a pressing process in which the stator S is accommodated in the motor casing MC and the stator S is pressed to one side in the radial direction so as to make the prescribed contact portion p3 contact the inside circumferential surface MRs of the motor casing and a process in which the stator S is fixed to the motor casing MC with the contact portion p3 in contact with the inside circumferential surface MRs of the motor casing MC.
MURAKAMI CHIDO
ISOTANI AKIRA
JINNO TAKEHITO
YAMAMOTO YOSHIHISA
| JP2005245096A | 2005-09-08 | |||
| JP2002233103A | 2002-08-16 |
Kunihiko Higashi
Ichiro Miyake
Otono Taiyo