Series connected series motors for independent loads

Details Series connected series motors for independent loads Series connected series motors for independent loads

1986-09-05

1987-04-14

Shoop, Jr., William M.

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Slipping and/or racing control for electric motors

318113, 318139, B61C 1514, H02P 768

Patent

active

046581898

ABSTRACT:
A traction drive system for a vehicle is disclosed which comprises a pair of series wound motors (32,34) which are connected in series with each other and which drive independent traction wheels (22,24), respectively, of the vehicle. The no-load torque of each traction wheel is correlated with the transient torque characteristic of the motors so that each motor produces a transient driving torque greater than the threshold-load torque of the wheels. Further, the no-load torque of each wheel is great enough so that the transient driving torque will not fall below the threshold-load torque during a predetermined time interval. This arrangement permits one traction wheel to move the vehicle at low speed while the other traction wheel spins on ice or otherwise fails to exhibit tractive effort.

REFERENCES:
patent: 2930957 (1960-03-01), Cronberger
patent: 3760246 (1973-09-01), Gurwicz et al.
patent: 4136303 (1979-01-01), Almquist et al.
patent: 4410947 (1983-10-01), Strong et al.

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