Modular power system

Electrical transmission or interconnection systems – Plural supply circuits or sources – Connecting or disconnecting

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307 66, 307149, 307150, 307151, H02J 100

Patent

active

046381783

ABSTRACT:
A modular power system for use with a digital computer is disclosed. The following major components of the power system are mounted in a convenient removable module, with at least one module for each required power output level: a pass transistor, a power transformer, a rectifier/filter, and a feedback circuit which controls the pulse width of the pass transistor. The modules contain air channels surrounding the pass transistor, for introducing cooling air via an air duct (manifold), so that the pass transistor is efficiently cooled. The need for potentiometers is abrogated by using a precision voltage reference in the feedback circuit to derive output voltages. The modules can also be used in a battery backed-up power system, in which a power system controller monitors and controls the inputs and outputs of the modules and other major components in the system in the case of line power failure. In the preferred embodiment each output voltage level for each module has associated with it a separate group of the following: pass transistor, power transformer, rectifier/filter and feedback circuit. The modules and the power system controller are slidably mounted in a card cage.

REFERENCES:
patent: 3717805 (1973-02-01), Gnaedinger et al.
patent: 3721890 (1973-03-01), Ettinger et al.
G. Eccher, Multiplex Equipment Power Supply, Nov. 1975, pp. 67-72.

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