Title:
電磁式リターダ
Document Type and Number:
Japanese Patent JP4970000
Kind Code:
B2
Abstract:
An electromagnetic type retarder comprises a main portion ( 6 ) consisting of a stator (12) having a plurality of magnetic coils ( L ) arranged along a circle and spaced apart from one another and a stator yoke ( 11 ) formed of laminated steel plates, and of a steel rotor ( 13 ) surrounding the stator ( 12 ) and rotated according to the rotation of a tire ( 1 ), and a driving device ( 10 ) for the main portion (6) to be controlled by an operation signal ( 7 ). The magnetic coils ( L ) consist of three-phase connections of A phase, B phase and C phase, each of the magnetic coils ( L ) being connected with a capacitor ( C ) so as to form a resonance circuit, respectively. The driving device ( 10 ) has transistors ( T ) connected in series to each of the three-phase connections and controlled so as to be opened and closed by the operation signal ( 7 ). The revolution speed of a rotary magnetic field generated by three-phase AC voltage induced in the magnetic coils ( L) forming the resonance circuits by the rotation of the steel rotor (13) is set smaller than the revolution speed of the steel rotor ( 13 ).
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Inventors:
Mitsuyoshi Oba
Akihiro Miyoshi
Kasai Hitoshi
Akihiro Miyoshi
Kasai Hitoshi
Application Number:
JP2006305312A
Publication Date:
July 04, 2012
Filing Date:
November 10, 2006
Export Citation:
Assignee:
Tbk corporation
Transtron Co., Ltd.
Transtron Co., Ltd.
International Classes:
H02K49/02
Domestic Patent References:
| JP2001359201A | ||||
| JP1501356A |
Attorney, Agent or Firm:
Seiichi Sawaki
Kiichi Sawaki
Kiichi Sawaki