US5274540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inverter device for stable, high power-factor input current supply
Assignee: Panasonic Electric Works Co Ltd
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Filing: 1991-11-26
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Granted: 1993-12-28
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Expires: 2011-11-26
Abstract
Abstract An inverter device for supplying a stable, high power-factor input current while restraining higher harmonics to be low is provided by a simple circuit structure in which a pulsating DC voltage supplied through a power circuit is provided to a smoothing condenser, a direct current is provided from the smoothing condenser to an inverter circuit section, and an input current path is formed from the power circuit through an impedance element to a switching element of the inverter circuit section and to part of an oscillation circuit.
Inventors
- 👤 Minoru Maehara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:39
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/42; H02M1/4208; H02M1/4241; H02M7/00; H02M1/425; H02M5/00; H02M5/40; H02M5/42; H02M5/44; H02M5/453; H02M5/458; H05; H05B; H05B41/00; H05B41/14; H05B41/26; H05B41/28; H02P; H02P2201/00; H02P2201/05; Y; Y02; Y02B; Y02B70/00; Y02B70/10
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
184 words
An inverter device for a stable, high power-factor current supply, the inverter device comprising: a rectifier receiving a source voltage from an AC power source and providing at an output a pulsating DC voltage, smoothing means receiving said pulsating DC voltage from said rectifier and providing at an output a smoothed DC voltage, said smoothing means including a condenser, an inverter circuit section connected in parallel with said smoothing means and including switching means receiving said smoothed DC voltage from the smoothing means including a chopper circuit and an oscillation circuit for generating a high frequency voltage in response to ON and OFF operation of said switching means, an impedance element coupling said inverter circuit section to at least one of said AC power source and said rectifier and forming a current path for an input current to directly flow from said AC power source through said impedance element and the switching means to said oscillation circuit, a DC blocking condenser connected in series with said oscillation circuit for blocking a DC component, and means for controlling a voltage across the DC blocking condenser.
Claim 2
Dependent Claim
184 words
An inverter device for a stable, high power-factor current supply, the inverter device comprising: a rectifier receiving a source voltage from an AC power source and providing at an output a pulsating DC voltage, smoothing means receiving said pulsating DC voltage from said rectifier and providing at an output a smoothed DC voltage, said smoothing means including a condenser, an inverter circuit section connected in parallel with said smoothing means and including switching means receiving said smoothed DC voltage from the smoothing means including a chopper circuit and an oscillation circuit for generating a high frequency voltage in response to ON and OFF operation of said switching means, an impedance element coupling said inverter circuit section to at least one of said AC power source and said rectifier and forming a current path for an input current to directly flow from said AC power source through said impedance element and the switching means to said oscillation circuit, a DC blocking condenser connected in series with said oscillation circuit for blocking a DC component, and means for controlling a voltage across the DC blocking condenser.
Claim 3
Dependent Claim
26 words
The device according to claim 1 wherein said oscillation circuit of said inverter circuit section includes an oscillation inductance and an oscillating condenser having a capacitance.
Claim 4
Dependent Claim
21 words
The device according to claim 2 wherein said smoothing means has a capacitance larger than the capacitance of said oscillating condenser.
Claim 5
Dependent Claim
13 words
The device according to claim 1 wherein said impedance element comprises an inductance.
Claim 6
Dependent Claim
22 words
The device according to claim 1 wherein said switching means comprises a pair of switching elements connected in series for alternating operation.
Claim 7
Dependent Claim
13 words
The device according to claim 1 wherein said impedance element comprises a condenser.
Claim 8
Dependent Claim
20 words
The device according to claim 1 wherein said impedance element comprises a series connection of an inductance and a condenser.
Claim 9
Dependent Claim
23 words
The device according to claim 1 wherein said oscillation circuit includes only one oscillation inductance, and said impedance element comprises only one inductance.
Claim 10
Dependent Claim
48 words
The device according to claim 1 wherein said smoothing means comprises a series circuit of a first condenser, a first diode, and a second condenser, and a second diode connected in parallel with said second condenser and said first diode in reverse polarity relative to said first diode.
Claim 11
Dependent Claim
64 words
The device according to claim 1 wherein said smoothing means is provided with a first current loop from the output of said rectifier through the smoothing means and a forward biased diode, an oscillation inductance included in said oscillation circuit of said switching means, and a second current loop from said oscillation inductance to the smoothing means during OFF operation of said switching means.
Claim 12
Dependent Claim
181 words
An inverter device for a stable, high power-factor current supply, the inverter device comprising: a rectifier receiving a source voltage from an AC power source and providing at an output a pulsating DC voltage, smoothing means receiving said pulsating DC voltage from said rectifier and providing at an output a smoothed DC voltage, said smoothing means including a condenser, an inverter circuit section connected in parallel with said smoothing means and including switching means receiving said smoothed DC voltage from the smoothing means including a chopper circuit and an oscillation circuit for generating a high frequency voltage in response to ON and OFF operation of said switching means, an impedance element coupling said inverter circuit section to at least one of said AC power source and said rectifier and forming a current path for an input current to directly flow from said AC power source through said impedance element and the switching means to said oscillation circuit, a condenser connected in series with said oscillation circuit for blocking a DC component, and means for controlling a voltage at the impedance element.
Claim 13
Dependent Claim
181 words
An inverter device for a stable, high power-factor current supply, the inverter device comprising: a rectifier receiving a source voltage from an AC power source and providing at an output a pulsating DC voltage, smoothing means receiving said pulsating DC voltage from said rectifier and providing at an output a smoothed DC voltage, said smoothing means including a condenser, an inverter circuit section connected in parallel with said smoothing means and including switching means receiving said smoothed DC voltage from the smoothing means including a chopper circuit and an oscillation circuit for generating a high frequency voltage in response to ON and OFF operation of said switching means, an impedance element coupling said inverter circuit section to at least one of said AC power source and said rectifier and forming a current path for an input current to directly flow from said AC power source through said impedance element and the switching means to said oscillation circuit, a condenser connected in series with said oscillation circuit for blocking a DC component, and means for controlling a voltage at the impedance element.
Claim 14
Dependent Claim
174 words
An inverter device for a stable, high power-factor current supply, the inverter device comprising: a rectifier receiving a source voltage from an AC power source and providing at an output a pulsating DC voltage, smoothing means receiving said pulsating DC voltage from said rectifier and providing at an output a smoothed DC voltage, said smoothing means including a condenser, an inverter circuit section connected in parallel with said smoothing means and including switching means receiving said smoothed DC voltage from the smoothing means including a chopper circuit and an oscillation circuit for generating a high frequency voltage in response to ON and OFF operation of said switching means, an impedance element coupling said inverter circuit section to said rectifier and forming a current path for an input current to flow from said AC power source through said impedance element and the switching means to said oscillation circuit, a DC blocking condenser connected in series with said oscillation circuit for blocking a DC component, and means for controlling a voltage across the DC blocking condenser.
Claim 15
Dependent Claim
174 words
An inverter device for a stable, high power-factor current supply, the inverter device comprising: a rectifier receiving a source voltage from an AC power source and providing at an output a pulsating DC voltage, smoothing means receiving said pulsating DC voltage from said rectifier and providing at an output a smoothed DC voltage, said smoothing means including a condenser, an inverter circuit section connected in parallel with said smoothing means and including switching means receiving said smoothed DC voltage from the smoothing means including a chopper circuit and an oscillation circuit for generating a high frequency voltage in response to ON and OFF operation of said switching means, an impedance element coupling said inverter circuit section to said rectifier and forming a current path for an input current to flow from said AC power source through said impedance element and the switching means to said oscillation circuit, a DC blocking condenser connected in series with said oscillation circuit for blocking a DC component, and means for controlling a voltage across the DC blocking condenser.
Claim 16
Dependent Claim
26 words
The device according to claim 12 wherein said oscillation circuit of said inverter circuit section includes an oscillation inductance and an oscillating condenser having a capacitance.
Claim 17
Dependent Claim
21 words
The device according to claim 13 wherein said smoothing means has a capacitance larger than the capacitance of said oscillating condenser.
Claim 18
Dependent Claim
13 words
The device according to claim 12 wherein said impedance element comprises an inductance.
Claim 19
Dependent Claim
22 words
The device according to claim 12 wherein said switching means comprises a pair of switching elements connected in series for alternating operation.
Claim 20
Dependent Claim
13 words
The device according to claim 12 wherein said impedance element comprises a condenser.
Claim 21
Dependent Claim
20 words
The device according to claim 12 wherein said impedance element comprises a series connection of an inductance and a condenser.
Claim 22
Dependent Claim
23 words
The device according to claim 12 wherein said oscillation circuit includes only one oscillation inductance, and said impedance element comprises only one inductance.
Claim 23
Dependent Claim
48 words
The device according to claim 12 wherein said smoothing means comprises a series circuit of a first condenser, a first diode, and a second condenser, and a second diode connected in parallel with said second condenser and said first diode in reverse polarity relative to said first diode.
Claim 24
Dependent Claim
61 words
The device according to claim 12 wherein said smoothing means is provided with a first current loop from said rectifier through the smoothing means and a forward biased, diode, an oscillation inductance included in said oscillation circuit of said switching means, and a second current loop from said oscillation inductance to the smoothing means during OFF operation of said switching means.
Claim 25
Dependent Claim
171 words
An inverter device for a stable, high power-factor current supply, the inverter device comprising: a rectifier receiving a source voltage from an AC power source and providing at an output a pulsating DC voltage, smoothing means receiving said pulsating DC voltage from said rectifier and providing at an output a smoothed DC voltage, said smoothing means including a condenser, an inverter circuit section connected in parallel with said smoothing means and including switching means receiving said smoothed DC voltage from the smoothing means including a chopper circuit and an oscillation circuit for generating a high frequency voltage in response to ON and OFF operation of said switching means, an impedance element coupling said inverter circuit section to said rectifier and forming a current path for an input current to flow from said AC power source through said impedance element and the switching means to said oscillation circuit, a condenser connected in series with said oscillation circuit for blocking a DC component, and means for controlling a voltage at the impedance element.
Claim 26
Dependent Claim
171 words
An inverter device for a stable, high power-factor current supply, the inverter device comprising: a rectifier receiving a source voltage from an AC power source and providing at an output a pulsating DC voltage, smoothing means receiving said pulsating DC voltage from said rectifier and providing at an output a smoothed DC voltage, said smoothing means including a condenser, an inverter circuit section connected in parallel with said smoothing means and including switching means receiving said smoothed DC voltage from the smoothing means including a chopper circuit and an oscillation circuit for generating a high frequency voltage in response to ON and OFF operation of said switching means, an impedance element coupling said inverter circuit section to said rectifier and forming a current path for an input current to flow from said AC power source through said impedance element and the switching means to said oscillation circuit, a condenser connected in series with said oscillation circuit for blocking a DC component, and means for controlling a voltage at the impedance element.
Claim 27
Dependent Claim
150 words
An inverter device for a stable, high power-factor current supply, the inverter device comprising: a rectifier receiving a source voltage from an AC power source and providing at an output a pulsating DC voltage, smoothing means receiving said pulsating DC voltage from said rectifier and providing at an output a smoothed DC voltage, said smoothing means including a condenser, an inverter circuit section connected in parallel with said smoothing means and including switching means receiving said smoothed DC voltage from the smoothing means including a chopper circuit and an oscillation circuit for generating a high frequency voltage in response to ON and OFF operation of said switching means, and an impedance element coupling said inverter circuit section to said AC power source and forming a current path for an input current to flow, from said AC power source through said impedance element and the switching means to said oscillation circuit.
Claim 28
Dependent Claim
150 words
An inverter device for a stable, high power-factor current supply, the inverter device comprising: a rectifier receiving a source voltage from an AC power source and providing at an output a pulsating DC voltage, smoothing means receiving said pulsating DC voltage from said rectifier and providing at an output a smoothed DC voltage, said smoothing means including a condenser, an inverter circuit section connected in parallel with said smoothing means and including switching means receiving said smoothed DC voltage from the smoothing means including a chopper circuit and an oscillation circuit for generating a high frequency voltage in response to ON and OFF operation of said switching means, and an impedance element coupling said inverter circuit section to said AC power source and forming a current path for an input current to flow, from said AC power source through said impedance element and the switching means to said oscillation circuit.
Claim 29
Dependent Claim
26 words
The device according to claim 23 wherein said oscillation circuit of said inverter circuit section includes an oscillation inductance and an oscillating condenser having a capacitance.
Claim 30
Dependent Claim
21 words
The device according to claim 24 wherein said smoothing means has a capacitance larger than the capacitance of said oscillating condenser.
Claim 31
Dependent Claim
13 words
The device according to claim 23 wherein said impedance element comprises an inductance.
Claim 32
Dependent Claim
22 words
The device according to claim 23 wherein said switching means comprises a pair of switching elements connected in series for alternating operation.
Claim 33
Dependent Claim
15 words
The device according to claim 23 wherein said switching means comprises a single switching element.
Claim 34
Dependent Claim
29 words
The device according to claim 23 wherein including a filter circuit connected between said AC power source and said rectifier, said filter circuit including an inductance and a condenser.
Claim 35
Dependent Claim
23 words
The device according to claim 23 wherein said oscillation circuit includes only one oscillation inductance, and said impedance element comprises only one inductance.
Claim 36
Dependent Claim
35 words
The device according to claim 23 wherein comprising a DC blocking condenser connected in series with said oscillation circuit for blocking a DC component and means for controlling a voltage across the DC blocking condenser.
Claim 37
Dependent Claim
61 words
The device according to claim 23 wherein said smoothing means is provided with a first current loop from said rectifier through the smoothing means and a forward biased diode, an oscillation inductance included in said oscillation circuit of said switching means, and a second current loop from said oscillation inductance to the smoothing means during OFF operation of said switching means.
Claim 38
Dependent Claim
48 words
The device according to claim 23 wherein said smoothing means comprises a series circuit of a first condenser, a first diode, and a second condenser, and a second diode connected in parallel with said second condenser and said first diode in reverse polarity relative to said first diode.
Claim 39
Dependent Claim
13 words
The device according to claim 23 wherein said impedance element comprises a condenser.
Claim 40
Dependent Claim
20 words
The device according to claim 23 wherein said impedance element comprises a series connection of an inductance and a condenser.
Claim 41
Dependent Claim
31 words
The device according to claim 23 comprising a condenser connected in series with said oscillation circuit for blocking a DC component and means for controlling a voltage at the impedance element.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-12-27 | 1997-06-28 | 1997-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-27 | 2001-06-28 | 2001-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-27 | 2005-06-28 | 2005-12-28 | $7700.00 | Window Closed / Lapsed |