Current monitoring of a modular power controller

Details Current monitoring of a modular power controller Current monitoring of a modular power controller

1975-11-05

1977-07-12

Pellinen, A. D.

Electricity: power supply or regulation systems

Remote sensing

318332, 323 9, 323 75E, H02P 516

Patent

active

040357155

ABSTRACT:
A power processor having improved current monitoring constructed from a plurality of power output modules which can be added or removed as desired to change the power output rating. The electrical output of the individual power modules are removably attached to an output combining structure. The electrical connections to the output combining structure also provide mechanical support for the power output modules. The servo controller is constructed so that as additional power modules are added, each provides a predetermined proportion of the output power. That is, each module will add in a linear fashion to the total output capability of the amplifier. The disclosed modular servo controller includes an improved current sampling circuit. A feedback signal is derived from the power output modules to protect the servo controller. The protection of the power controller is one function of the feedback signal, in that, it limits the maximum current derivable from the controller under normal conditions. The primary function of the current feedback signal is to provide an error signal which when combined with the input command causes the current output to be properly metered to a load. The feedback signal can be obtained from only one of the output modules since load current sharing is provided in the paralleled output module to a degree sufficient to guarantee that sampling the current flow through one module produces a signal proportional to the actual total load current. Alternately, the feedback current signal can be obtained from a composite signal derived from individual signals from each module. A third way of obtaining the feedback signal is through a sampling of the combined output currents from each module.

REFERENCES:
patent: 3521150 (1970-07-01), Bates
patent: 3675114 (1972-07-01), Nercessian
patent: 3694764 (1972-09-01), Barron
patent: 3815014 (1974-06-01), Davis et al.
patent: 3828207 (1974-08-01), Shaw

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