Modular uninterruptable power supply system
First Claim
1. An uninterruptable power supply module, comprising:
- a DC power supply having an output for outputting a first DC voltage signal;
a battery backup module in parallel connection to the output of the DC power supply and having an identical voltage level to that of the first DC voltage signal;
boost converter means having an input coupled to the first DC voltage signal for converting said first DC voltage signal to a second DC voltage signal;
DC/AC conversion means having an input coupled to the second DC voltage signal from the boost converter means and an output for generating a pulse-width-modulated voltage signal in response to a variable duty cycle oscillation signal;
pulse width modulator means having an output coupled to said DC/AC conversion means for generating said variable duty cycle oscillation signal;
shaping means having an input coupled to the pulse-width-modulated voltage signal from the DC/AC conversion means and an output for supplying a sine voltage signal; and
overload protection means having a first input coupled to the DC/AC conversion means for receiving a detection signal therefrom and a second input coupled to the battery backup module for receiving a reference signal therefrom and generating a trip signal to disconnect the input of the shaping means when a voltage level of the detection signal from the DC/AC conversion means is higher than a voltage level of the reference signal.
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Accused Products
Abstract
An uninterruptable power supply module includes a DC power supply having an output for outputting a first DC voltage signal, a battery backup module in parallel connection to the output of the DC power supply and having an identical voltage level to that of the first DC voltage signal, boost converter means having an input coupled to the first DC voltage signal from the battery backup module for converting said first DC voltage signal to a second DC voltage signal, DC/AC conversion means having an input coupled to the second DC voltage signal from the boost converter means and an output for generating a first AC voltage signal in response to a variable duty cycle oscillation signal, pulse width modulator means powered by said battery backup module and having an output coupled to said DC/AC conversion means for generating said variable duty cycle oscillation signal, and shaping means having an input coupled to the first AC voltage signal from the DC/AC conversion means and an output for supplying a second AC voltage signal.
22 Citations
5 Claims
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1. An uninterruptable power supply module, comprising:
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a DC power supply having an output for outputting a first DC voltage signal; a battery backup module in parallel connection to the output of the DC power supply and having an identical voltage level to that of the first DC voltage signal; boost converter means having an input coupled to the first DC voltage signal for converting said first DC voltage signal to a second DC voltage signal; DC/AC conversion means having an input coupled to the second DC voltage signal from the boost converter means and an output for generating a pulse-width-modulated voltage signal in response to a variable duty cycle oscillation signal; pulse width modulator means having an output coupled to said DC/AC conversion means for generating said variable duty cycle oscillation signal; shaping means having an input coupled to the pulse-width-modulated voltage signal from the DC/AC conversion means and an output for supplying a sine voltage signal; and overload protection means having a first input coupled to the DC/AC conversion means for receiving a detection signal therefrom and a second input coupled to the battery backup module for receiving a reference signal therefrom and generating a trip signal to disconnect the input of the shaping means when a voltage level of the detection signal from the DC/AC conversion means is higher than a voltage level of the reference signal. - View Dependent Claims (2, 3, 4, 5)
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Specification