US 8,803,361 B2 · Apparatus and method for providing uninterruptible power

Abstract

Systems and methods of controlling an uninterruptible power supply are provided. The uninterruptible power supply includes an input to receive input power, and an output to provide power to a load. The uninterruptible power supply also includes an inverter, a bypass switch, and a controller. The inverter is coupled with the input and with the output, and the bypass switch can provide the input power at the output in a bypass mode of operation. The controller is coupled with the inverter and the bypass switch. The controller can activate the bypass switch in a first configuration to provide the input power at the output during a first half of a cycle of an input voltage waveform, and can activate the bypass switch in a second configuration to provide the input power at the output during a second half of the cycle. With the inverter active during bypass operation, the inverter can more quickly provide output power upon the loss of bypass power, and can provide near unity power factor correction and harmonic distortion correction.

Claims16

Dependent claims

An uninterruptible power supply, comprising:

an input configured to receive input power;
an output;
a power conversion circuit coupled with the input and the output;
a bypass switch configured to couple the input to the output in a bypass mode of operation;
a controller coupled with the power conversion circuit, and the bypass switch;
the controller configured to activate the bypass switch in a first configuration to provide the input power at the output during a first half of a cycle of an input voltage waveform;
and
the controller configured to activate the bypass switch in a second configuration different from the first configuration to provide the input power at the output during a second half of the cycle of the input voltage waveform
wherein the controller comprises a phase lock loop circuit and a gate control circuit, the phase lock loop circuit configured to provide the input voltage waveform to the gate control circuit, and the gate control circuit configured to activate the bypass switch in one of the first configuration and the second configuration based at least in part on the input voltage waveform.

6 more elements

A method of distributing power using an uninterruptible power supply having an input, an output, a power conversion circuit, and a bypass switch, the method comprising:

operating the uninterruptible power supply in a bypass mode wherein power at the output is provided from an input power source via the bypass switch;
controlling the bypass switch to operate in a first configuration to provide power at the output during a first half of a cycle of an input voltage waveform;
and
controlling the bypass switch to operate in a second configuration to provide power at the output during a second half of the cycle of the input voltage waveform;
and
using a phase lock loop circuit and a gate control circuit to activate the bypass switch in one of the first configuration and the second configuration based at least in part on the input voltage waveform.

3 more elements

Dependencies are inferred from the claim text.

Apparatus and method for providing uninterruptible power

Life of this patent

Apparatus and method for providing uninterruptible power

Life of this patent

Abstract

Claims16