Drive isolation transformer controller and method

Details Drive isolation transformer controller and method Drive isolation transformer controller and method

2011-02-01

2011-02-01

Deberadinis, Robert L. (Department: 2836)

Electrical transmission or interconnection systems

Nonlinear reactor systems

Driver circuits

Reexamination Certificate

active

07880343

ABSTRACT:
A transformer controller for a drive isolation transformer is provided. The transformer may include multiple sets of primary windings as an input, and the transformer controller may include multiple branches coupled between a power source and the transformer. Each branch may be coupled to its own primary winding on the transformer, and may include one or more components, such as an isolation switch, a fuse, contactor, or circuit breaker. One or more of the branches may include a pre-charge reactor to limit inrush or capacitor charging current occurring during startup, and may include a pre-charge contactor to remove the pre-charge reactor from the circuit when the startup process has reached a certain level (e.g., the charging or inrush current has dissipated, or a DC bus reaches a charged state).

REFERENCES:
patent: 6804127 (2004-10-01), Zhou
patent: 7092262 (2006-08-01), Ryan et al.
patent: 7511975 (2009-03-01), Hammond
patent: 2008/0185999 (2008-08-01), Matsukawa et al.
patent: 2008/0205101 (2008-08-01), Kleinecke et al.

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