초록 ▼

A boost-input backed-up uninterruptable power supply from an input voltage source, such as a 60 cycle 120/240 Vac service, provides an uninterrupted output voltage to a load connected to a return. The backed-up power supply has an input rectifier and low energy storage filter coupled to the input vo

A boost-input backed-up uninterruptable power supply from an input voltage source, such as a 60 cycle 120/240 Vac service, provides an uninterrupted output voltage to a load connected to a return. The backed-up power supply has an input rectifier and low energy storage filter coupled to the input voltage source for converting the input voltage source into at least an unregulated positive dc voltage source, and an unregulated negative dc voltage source. Each respective unregulated source has a respective unregulated dc voltage value with respect to the return. Two 120V battery stacks provides respective positive and negative battery voltages at corresponding positive and negative battery output terminals. A diode isolates the unregulated positive and negative dc voltage sources from their respective battery voltages for unregulated voltage source values equal to or greater than their respective battery voltages and clamps the unregulated dc voltage values to their respective battery voltages in response to loss of the sinusoidal input voltage source. A boost regulator receives power from the unregulated positive and negative dc voltage sources and provides a positive and a negative regulated dc voltage with respect to the return. A dc-to-ac converter receives a reference signal and converts the positive and negative regulated dc voltage into at least a first uninterrupted output voltage for application to the load.

대표청구항 ▼

A boost-input backed-up uninterruptible power supply powered from an input voltage source for providing an uninterrupted output voltage to a load connected to a return, the boost-input backed-up uninterruptible power supply comprising: an input rectifier coupled to the input voltage source for conve

A boost-input backed-up uninterruptible power supply powered from an input voltage source for providing an uninterrupted output voltage to a load connected to a return, the boost-input backed-up uninterruptible power supply comprising: an input rectifier coupled to the input voltage source for converting the input voltage source into at least a substantially unfiltered unregulated positive dc voltage source and a substantially unregulated unfiltered negative dc voltage source, each respective unregulated voltage source providing a respective unregulated dc voltage with respect to the return; a battery means for providing respective positive and negative battery voltages at corresponding positive and negative battery output terminals; a current switch means for isolating the unregulated positive and negative dc voltage sources from their respective battery voltages and for providing respective unregulated dc voltages equal to or greater than their respective battery voltage and for clamping each respective unregulated dc voltage to its respective battery voltage in response to loss of the input voltage source; a boost regulator means coupled to receive power from the unregulated positive and negative dc voltage sources for providing a positive and a negative regulated dc voltage with respect to the return; a dc-to-ac converter means responsive to a reference signal and coupled to convert the positive and negative regulated dc voltage into at least a first uninterrupted output voltage having an amplitude proportional to the reference signal for application to the load, said uninterrupted output voltage being sampled and scaled to provide an output voltage sense signal, the output voltage sense signal being combined with the reference signal to provide an amplified error signal, the dc-to-ac converter being responsive to the amplified error signal to adjust and scale the output voltage to minimize the amplified error signal.