Power conversion device
AssigneeToshiba Tec Kabushiki Kaisha
InventorYutaka Usami
Life of this patent
Estimating the term…
Abstract
A power conversion device includes first and second current detectors. A coil is connected a first power terminal through the first and second current detectors. A first switch has a source terminal connected to the coil and a second semiconductor switch has a drain terminal connected to the coil. A first diode is connected between a drain terminal of the first semiconductor switch and a second power supply terminal. A second diode is connected between a source terminal of the second semiconductor switch and the second power terminal. A capacitor is connected in parallel with the first and second diodes. A control circuit is configured to turn the first and second semiconductor switches on or off based on current detections of the first and second current detectors.
Claims20
A power conversion device, comprising:
- a first current detector;
- a second current detector connected between the first current detector and a first power supply terminal, a connection point between the first current detector and the second current detector being a ground potential;
- a coil having a first end connected to the first power supply terminal through the first and second current detectors connected in series;
- a first semiconductor switch with a first terminal connected to a second end of the coil;
- a second semiconductor switch with a first terminal connected to the second end of the coil;
- a first diode with a cathode connected to a second terminal of the first semiconductor switch and an anode connected to a second power supply terminal;
- a second diode with an anode connected to a second terminal of the second semiconductor switch and a cathode connected to the second power supply terminal;
- a smoothing capacitor connected in parallel with the first and second diodes and connected between the cathode of the first diode and the anode of the second diode;
- and
- a control circuit configured to turn the first and second semiconductor switches on or off based on a current detection of the first current detector and a current detection of the second current detector.
A power conversion device, comprising:
- a first current detector;
- a second current detector connected between the first current detector and a first power supply terminal, a connection point between the first current detector and the second current detector being a ground potential;
- a power factor correction circuit including:
- a coil having a first end connected to the first power supply terminal through the first and second current detectors connected in series,
- a first semiconductor switch with a first terminal connected to a second end of the coil,
- a second semiconductor switch with a first terminal connected to the second end of the coil,
- a first diode with a cathode connected to a second terminal of the first semiconductor switch and an anode connected to a second power supply terminal,
- a second diode with an anode connected to a second terminal of the second semiconductor switch and a cathode connected to the second power supply terminal, and
- a smoothing capacitor connected in parallel with the first and second diodes and connected between the cathode of the first diode and the anode of the second diode;
- and
- a control circuit configured to turn the first and second semiconductor switches on or off based on a current detection of the first current detector and a current detection of the second current detector.
Dependencies are inferred from the claim text.