Variable speed drive unit for electric vehicle and variable spee

Details Variable speed drive unit for electric vehicle and variable spee Variable speed drive unit for electric vehicle and variable spee

1997-01-21

1998-10-27

Marmor, Charles A.

Interrelated power delivery controls, including engine control

Electric engine

With transmission control

74336R, H02P 1700

Patent

active

058271481

ABSTRACT:
In an electric vehicle provided with an electric motor (M), a motor drive circuit (17) and a control circuit section (15) for outputting an operation command to the motor drive circuit, a variable speed drive unit for electric vehicles has a transmission apparatus (20) which engages or disengages a drive shaft (7a) which receives the drive force from a propelling motor and a driven shaft (5a) which is interconnected with propelling wheels by an electromagnetic engagement clutch (30), the transmission apparatus has the electromagnetic clutch comprised of a first clutch (22) interconnected with the drive shaft, a second clutch (25) having a rotational speed different from the first clutch, and an output side clutch (21) interconnected with the driven shaft; and the output side clutch and the first clutch or the second clutch are alternatively connected to selectively change the motor output. And, to connect the clutches mutually, the rotational speed of the clutch on the drive side is synchronized with the rotational speed of the clutch on the driven side.

REFERENCES:
patent: 2692511 (1954-10-01), Nallinger
patent: 2919594 (1960-01-01), Patrignani et al.
patent: 2927474 (1960-03-01), Peras
patent: 2969134 (1961-01-01), Wiedmann et al.
patent: 3239038 (1966-03-01), Peras
patent: 3896914 (1975-07-01), Konsbruck et al.
patent: 3898893 (1975-08-01), Hashimoto et al.
patent: 4509629 (1985-04-01), Pajgrt et al.
patent: 5395293 (1995-03-01), Matsuura et al.
patent: 5498216 (1996-03-01), Bitsche et al.

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