Electricity: motive power systems – Braking – Dynamic braking
Patent
1995-04-04
1997-01-28
Ro, Bentsu
Electricity: motive power systems
Braking
Dynamic braking
318139, 318300, 318519, 318536, H02P 314
Patent
active
055980724
ABSTRACT:
A separately excited DC motor system is arranged to provide operation in a smooth, continuous electrical retarding mode. A series contactor connects the motor armature to a DC power source and is controlled so as to immediately open upon sensing of a need for electrical braking. Concurrently, power to the motor field is reversed so that no additional changes are required to brake to zero speed. Field current is modulated to control armature current so as to control braking effort. When speed falls below a value necessary to maintain armature voltage above battery voltage, the armature is cyclically short-circuited to boost armature current so that when the short-circuit is removed, the armature reactance forces current to continue for regeneration.
REFERENCES:
patent: 4375603 (1983-03-01), Konrad
patent: 4422021 (1983-12-01), Schwarz
patent: 4730151 (1988-03-01), Florey et al.
patent: 5039924 (1991-08-01), Avitan
patent: 5070283 (1991-12-01), Avitan
patent: 5332954 (1994-07-01), Lankin
patent: 5489828 (1996-02-01), Palleggi
WPI Abstract Accession No. 001463398 & DE2538754A (LUCAS) Mar. 11, 1976.
General Electric Company
Krisher, Jr. Ralph E.
Ro Bentsu
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