Shutdown control means for an electric power supply
Номер патента: CA1271810A
Опубликовано: 17-07-1990
Автор(ы): Ken Hanyuda, Michimasa Ohara
Принадлежит: Fujitsu Ltd
Опубликовано: 17-07-1990
Автор(ы): Ken Hanyuda, Michimasa Ohara
Принадлежит: Fujitsu Ltd
Реферат: ABSTRACT OF THE DISCLOSURE There is described control circuitry for shutting down a constant current supply suitable for a double-end power feeding system for a long-haul wire telecommunication system. The shutdown control circuitry comprises a voltage detecting circuit, a current detecting circuit and an AND gate. The voltage and current detecting circuits provide the respective detection signals when the constant current supply provides an output voltage larger than a predetermined voltage value and the current at the output voltage is smaller than a predetermined current value. The predetermined voltage and current values are determined corresponding to a input resistance of a load circuit to which the feeding of current by the constant current supply is stopped. Thus, the shutdown condition of the constant current supply can be determined free from the drooping characteristic of the constant current supply and hence the withstand voltages required for the circuit components can be reduced. There are also described embodiments in which the basic concept of the invention is applied to constant voltage supplies connected in parallel to each other to a load circuit.
Interlock switching circuit for protecting an electrical on-board power supply
Номер патента: US09550423B2. Автор: Stefan Butzmann. Владелец: Samsung SDI Co Ltd. Дата публикации: 2017-01-24.