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Charge circuits for ups
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Systems and methods for producing standby uninterruptible power for AC loads using rectified AC and battery
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Frequency converter and improved UPS employing the same
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Wireless selective tripping of AC power systems connected in parallel
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Independent load sharing of AC power systems connected in parallel
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Uninterruptible power supply input power walk-in
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Method for notch modulating a rectifier for three phase operation
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Series resonant converter having a three part resonant inductor
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Ups system with improved network communications
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Gate-drive circuit
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Isolated gate drive
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Power supply with improved circuit for harmonic paralleling
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Series/parallel resonant converter
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Simplified UPS system
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Voltage source with enhanced source impedance control
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Uninterruptible power supply with isolated bypass winding
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Emergency device employing programmable vocal warning commands
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Method and apparatus for controlling access in a data transmission system
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Computer communications control
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Method and apparatus for controlling a resonant power module
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