US 2017/0324338 A1 · POWER CONVERSION DEVICE AND METHOD OF OPERATING A POWER CONVERSION DEVICE

Abstract

A power conversion device includes a low-pass filter, a second inductor, a first switch, a third switch, a second capacitor, and a controller. The low-pass filter is configured for direct coupling to an alternating current power source. The first switch is connected in series with a second switch, a first connection point. The third switch is connected in series with a fourth switch, a second connection point. The second capacitor is coupled to the first switch, the second switch, the third switch, and the fourth switch. The controller turns on and off the first, the second, the third, and the fourth switches based on a voltage of the alternating current power source directly coupled to the low-pass filter, a circuit current through the second inductor, a voltage across the second capacitor, and an average output voltage of the load circuit.

Claims20

Dependent claims

A power conversion device, comprising:

a low-pass filter comprising a first inductor and a first capacitor, and configured for direct coupling to an alternating current power source;
a second inductor coupled between the low-pass filter and a load circuit;
a first switch connected in series with a second switch, a first connection point between the first switch and the second switch coupled to the low-pass filter;
a third switch connected in series with a fourth switch, a second connection point between the third switch and the fourth switch coupled to the load circuit;
a second capacitor coupled to the first switch, the second switch, the third switch, and the fourth switch;
and
a controller configured to turn on and off the first, the second, the third, and the fourth switches based on a voltage of the alternating current power source directly coupled to the low-pass filter, a circuit current through the second inductor, a voltage across the second capacitor, and an average output voltage of the load circuit.

4 more elements

A method of operating a power conversion device, comprising:

detecting an alternating current power source voltage supplied across a first node directly coupled to a first end of a first inductor and a second node directly coupled to a first connection point between first ends of first and second switches;
detecting a circuit current in a second inductor connected between a first capacitor and a load circuit that is coupled to first ends of third and fourth switches, the first capacitor having a first end connected to the first connection point and a second end connected to a second end of the first inductor, the third switch having a second end connected to a second end of the first switch and the fourth switch having a second end connected to a second end of the second switch;
detecting a voltage across a second capacitor coupled between the second ends of the third and fourth switches;
detecting an average output voltage of the load circuit;
generating first and second pulse signals based on the alternating current power source voltage, the circuit current, the voltage across the second capacitor, and the average output voltage of the load circuit;
and
supplying the first pulse signal to the first and fourth switches and the second pulse signal to the second and third switches.

4 more elements

Dependencies are inferred from the claim text.

Power conversion device and method of operating a power conversion device

Life of this patent

Power conversion device and method of operating a power conversion device

Life of this patent

Abstract

Claims20