LandOfFree - US Patents - Listing for Electric power conversion systems

Electric power conversion systems – Frequency conversion without intermediate conversion to d.c.

Frequency converter

Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter

Frequency converter

Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter

Frequency converter and a method of applying same

Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter

Frequency converter and improved UPS employing the same

Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter

Frequency converter and its control method

Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter

Frequency converter and method of operating same

Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter

Frequency converter apparatus

Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By induction-type converter

Frequency converter apparatus

Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter

Frequency converter assembly and method of using frequency...

Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter

Frequency converter circuit including a single-ended blocking fr

Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter

Frequency converter with an intermediate buck-boost...

Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter

Frequency converter with an intermediate d-c link

Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter

Frequency converter, procedure for controlling it and motor cont

Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter

Frequency converters

Electric power conversion systems – Frequency conversion without intermediate conversion to d.c.

Frequency converting apparatus

Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter

Frequency converting device and control method therefor

Electric power conversion systems – Frequency conversion without intermediate conversion to d.c.

Frequency dividing apparatus for high frequency

Electric power conversion systems – Current conversion – Using semiconductor-type converter

Frequency doubler and/or self-oscillating inverter

Electric power conversion systems – Frequency conversion without intermediate conversion to d.c.

Frequency doubler circuit and method