Electricity: battery or capacitor charging or discharging – Battery or cell charging – With detection of current or voltage amplitude
Patent
1998-06-11
1999-11-23
Wong, Peter S.
Electricity: battery or capacitor charging or discharging
Battery or cell charging
With detection of current or voltage amplitude
322 28, H02J 700
Patent
active
059906669
ABSTRACT:
A short protection circuit is provided to periodically supply a reset pulse, turns on an electric power element only during the period of the reset pulse, and decide the presence and absence of a short circuit under the condition that the electric power transistor is forced to turn off when a field coil is short-circuited. In this short portection circuit, while the field coil is short-circuit, the reset pulse cycle is reduced, and hence the number of times the resetting is made per unit time is reduced, thus preventing the electric power element from generating excessive heat when the field coil is short-circuited.
REFERENCES:
patent: 5444354 (1995-08-01), Takahashi et al.
patent: 5448154 (1995-09-01), Kanke et al.
patent: 5617011 (1997-04-01), Hammer et al.
patent: 5841266 (1998-11-01), Hikita et al.
Masumoto Syouju
Sekiya Noritaka
Takahashi Naoyuki
Hitachi , Ltd.
Hitachi Car Engineering Co. Ltd.
Shin K.
Wong Peter S.
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