Apparatus and method for power conversion having diode in charging and discharging circuit
AssigneeNEC Electronics Corporation
InventorYouichi Ito
Life of this patent
Estimating the term…
Abstract
A power converting apparatus includes a rectifying circuit having a pair of AC power input terminals and a pair of rectified voltage output terminals; a reactor; and a charging and discharging circuit connected between the rectified voltage output terminals. The charging and discharging circuit includes a first condenser connected with one of the rectified voltage output terminals and one of the AC power input terminals; and a second condenser connected with the other of the rectified voltage output terminals and the one AC power input terminal. The reactor generates a resonance current together with the first condenser and the second condenser, and the second condenser discharges to zero voltage while the first condenser is charged.
Claims7
A power converting apparatus comprising:
- a rectifying circuit having a pair of AC power input terminals and a pair of rectified voltage output terminals;
- an inductor;
- and
- a charging and discharging circuit connected between said rectified voltage output terminals,
- wherein said charging and discharging circuit comprises:
- a first charging and discharging circuit connected with one of said rectified voltage output terminals and one of said AC power input terminals;
- and
- a second charging and discharging circuit connected with the other of said rectified voltage output terminals and said one AC power input terminal,
- said first charging and discharging circuit comprises a first diode and a first capacitor connected with said first diode in series,
- said second charging and discharging circuit comprises a second diode and a second capacitor connected with said second diode in series, and
- said charging and discharging circuit further comprises:
- a switch section connected in parallel with a series connection of said first and second diodes,
- said inductor generates a resonance current together with said first capacitor and said second capacitor, and
- said second capacitor discharges to zero voltage while said first capacitor is charged.
A power converting circuit comprising:
- a rectifying circuit having a pair of AC power supply input terminals and a pair of rectification voltage output terminals;
- a charging and discharging circuit connected between the rectification voltage output terminals;
- and
- an inductor connected with one of the AC power supply input terminals,
- wherein said charging and discharging circuit comprises a first capacitor, a first diode, a second diode and a second capacitor, which are connected in this order in series between the rectification voltage output terminals, and
- wherein one of the AC power input terminals is connected with a common node between said first diode and said second diode,
- said first capacitor is connected between one of the rectification voltage output terminals and said first diode,
- said first diode is connected between said first capacitor and said common node,
- said second diode is connected between said common node and said second capacitor, and
- said second capacitor is connected between the other of the rectification voltage output terminals and said second diode.
Dependencies are inferred from the claim text.