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Ultra-capacitor based dynamically regulated charge pump...

Electric power conversion systems – Current conversion – With voltage multiplication means
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Ultra-wide input range switching power supply for circuit...

Electric power conversion systems – Current conversion – Including automatic or integral protection means
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Ultrasonic frequency power supply

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

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Undershoot eliminator circuit and method for synchronous...

Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
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Unidirectional three phase pulse controlled rectifier system...

Electric power conversion systems – Current conversion – With condition responsive means to control the output...
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Unified constant-frequency integration control of...

Electric power conversion systems – Current conversion – With condition responsive means to control the output...
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Unified constant-frequency integration control of...

Electric power conversion systems – Current conversion – With condition responsive means to control the output...
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Unified power architecture

Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
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Unified power architecture with dynamic reset

Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
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Uninterruptable capability for an active power line conditioner

Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent

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Uninterruptable off-line, isolated flyback topology switch-mode

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

Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter
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Uninterrupted power supply and the method for driving its...

Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
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Uninterrupted power supply having no low frequency power magneti

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

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Uninterrupted power supply system

Electric power conversion systems – Current conversion – With means to connect the input to diverse power sources
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Uninterrupted power supply system having improved power factor c

Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent

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Uninterrupted power supply without power loss

Electric power conversion systems – Current conversion – With condition responsive means to control the output...
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Uninterruptible DC power system

Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter
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Uninterruptible duplexed power supply system

Electric power conversion systems – Current conversion – Having plural converters for single conversion
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Uninterruptible duplexed power supply system, and unit...

Electric power conversion systems – Current conversion – Having plural converters for single conversion
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