Patent EP0488478A2 successfully refreshed from Google Patents.
EP0488478A2
Expired / Lapsed
EP
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Inverter device
Assignee: Panasonic Electric Works Co Ltd
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Filing: 1991-11-27
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Granted: —
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Expires: 2011-11-27
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
EP
Data Source
google_patents
Last Synchronized
2026-11-01 06:43
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: 33
Claim 1
Independent Claim
166 words
An inverter device in which a pulsating DC voltage is provided from a rectifier receiving a source power voltage from an AC power source to a smoothing condenser, a direct current is applied from the smoothing condenser to an inverter circuit section including an oscillation circuit having a load, said direct current from said smoothing condenser is applied to a switching element included in said inverter circuit section and also forming part of a chopper circuit, and then a high frequency voltage is applied by said oscillation circuit in response to ON/OFF operation of said switching element, characterized in that an impedance element is inserted between at least one of an output end of said AC power source and an output end of said rectifier and said inverter circuit section so as to form a path to which an input current is made to directly flow, said path being from the AC power source through the impedance element, switching element and part of the oscillation circuit.
Claim 2
Dependent Claim
30 words
The device according to claim 1 wherein said oscillation circuit of said inverter circuit section further includes an oscillation inductance element and an oscillating condenser in addition to said load.
Claim 3
Dependent Claim
21 words
The device according to claim 2 wherein said smoothing condenser has a capacity made larger than that of said oscillating condenser.
Claim 4
Dependent Claim
21 words
The device according to claim 1 wherein said impedance element comprises at least one of an inductance element and a condenser.
Claim 5
Dependent Claim
32 words
The device according to claim 1 wherein a pair of said switching elements are provided in series in said inverter circuit section, said pair of switching elements being arranged for alternate operation.
Claim 6
Dependent Claim
14 words
The device according to claim 1 wherein said switching element is provided in single.
Claim 7
Dependent Claim
31 words
The device according to claim 1 which further comprises a filter circuit inserted between said AC power source and said rectifier, said filter circuit including an inductance element and a condenser.
Claim 8
Dependent Claim
38 words
The device according to claim 1 wherein said part of the oscillation circuit of means for forming the path of the input current includes only an oscillation inductance element, and said impedance element comprises only an inductance element.
Claim 9
Dependent Claim
59 words
The device according to claim 1 which further comprises a condenser connected in series to said oscillation circuit for cutting DC component, and means connected to said DC cutting condenser and said impedance element for controlling one of a voltage across the DC cutting condenser and a voltage at the impedance element in a direction of dropping the voltage.
Claim 10
Dependent Claim
97 words
The device according to claim 1 wherein said smoothing condenser is provided with a first loop of a current from an output end of said rectifier providing said pulsating DC voltage through at least the smoothing condenser, a normally directioned diode and an oscillation inductance element included in said oscillation circuit to said switching element of the oscillation circuit, and with a second loop of a current from said oscillation inductance element to the smoothing condenser for discharging an energy accumulated in the oscillation inductance element to the smoothing condenser upon OFF operation of said switching element.
Claim 11
Dependent Claim
67 words
The device according to claim 1 wherein said smoothing condenser comprises a series circuit of a first condenser, first diode and second condenser and a second diode connected in inverse parallel to a junction point between one of said first and second condensers and said first diode, the other of said first and second condensers forming part of said chopper circuit and part of said oscillation circuit.
Claim 12
Dependent Claim
152 words
An inverter device in which a pulsating DC voltage is provided from a rectifier receiving a source power voltage from an AC power source to a smoothing condenser, a direct current is applied from the smoothing condenser to an inverter circuit section including an oscillation circuit having a load, said direct current from said smoothing condenser is applied to a switching element included in said inverter circuit section and also forming part of a chopper circuit, and then a high frequency voltage is applied by said oscillation circuit in response to ON/OFF operation of said switching element, characterized in that an impedance element is inserted between an output end of said rectifier and said inverter circuit section so as to form a path to which an input current is made to flow, said path being from the AC power source through the impedance element, switching element and part of the oscillation circuit.
Claim 13
Dependent Claim
30 words
The device according to claim 12 wherein said oscillation circuit of said inverter circuit section further includes an oscillation inductance element and an oscillating condenser in addition to said load.
Claim 14
Dependent Claim
21 words
The device according to claim 13 wherein said smoothing condenser has a capacity made larger than that of said oscillating condenser.
Claim 15
Dependent Claim
21 words
The device according to claim 12 wherein said impedance element comprises at least one of an inductance element and a condenser.
Claim 16
Dependent Claim
32 words
The device according to claim 12 wherein a pair of said switching elements are provided in series in said inverter circuit section, said pair of switching elements being arranged for alternate operation.
Claim 17
Dependent Claim
14 words
The device according to claim 12 wherein said switching element is provided in single.
Claim 18
Dependent Claim
31 words
The device according to claim 12 which further comprises a filter circuit inserted between said AC power source and said rectifier, said filter circuit including an inductance element and a condenser.
Claim 19
Dependent Claim
38 words
The device according to claim 12 wherein said part of the oscillation circuit of means for forming the path of the input current includes only an oscillation inductance element, and said impedance element comprises only an inductance element.
Claim 20
Dependent Claim
59 words
The device according to claim 12 which further comprises a condenser connected in series to said oscillation circuit for cutting DC component, and means connected to said DC cutting condenser and said impedance element for controlling one of a voltage across the DC cutting condenser and a voltage at the impedance element in a direction of dropping the voltage.
Claim 21
Dependent Claim
97 words
The device according to claim 12 wherein said smoothing condenser is provided with a first loop of a current from an output end of said rectifier providing said pulsating DC voltage through at least the smoothing condenser, a normally directioned diode and an oscillation inductance element included in said oscillation circuit to said switching element of the oscillation circuit, and with a second loop of a current from said oscillation inductance element to the smoothing condenser for discharging an energy accumulated in the oscillation inductance element to the smoothing condenser upon OFF operation of said switching element.
Claim 22
Dependent Claim
67 words
The device according to claim 12 wherein said smoothing condenser comprises a series circuit of a first condenser, first diode and second condenser and a second diode connected in inverse parallel to a junction point between one of said first and second condensers and said first diode, the other of said first and second condensers forming part of said chopper circuit and part of said oscillation circuit.
Claim 23
Dependent Claim
154 words
An inverter device in which a pulsating DC voltage is provided from a rectifier receiving a source power voltage from an AC power source to a smoothing condenser, a direct current is applied from the smoothing condenser to an inverter circuit section including an oscillation circuit having a load, said direct current from said smoothing condenser is applied to a switching element included in said inverter circuit section and also forming part of a chopper circuit, and then a high frequency voltage is applied by said oscillation circuit in response to ON/OFF operation of said switching element, characterized in that an impedance element is inserted between an output end of said AC power source and said inverter circuit section so as to form a path to which an input current is made to flow, said path being from the AC power source through the impedance element, switching element and part of the oscillation circuit.
Claim 24
Dependent Claim
30 words
The device according to claim 23 wherein said oscillation circuit of said inverter circuit section further includes an oscillation inductance element and an oscillating condenser in addition to said load.
Claim 25
Dependent Claim
21 words
The device according to claim 24 wherein said smoothing condenser has a capacity made larger than that of said oscillating condenser.
Claim 26
Dependent Claim
21 words
The device according to claim 23 wherein said impedance element comprises at least one of an inductance element and a condenser.
Claim 27
Dependent Claim
32 words
The device according to claim 23 wherein a pair of said switching elements are provided in series in said inverter circuit section, said pair of switching elements being arranged for alternate operation.
Claim 28
Dependent Claim
14 words
The device according to claim 23 wherein said switching element is provided in single.
Claim 29
Dependent Claim
31 words
The device according to claim 23 which further comprises a filter circuit inserted between said AC power source and said rectifier, said filter circuit including an inductance element and a condenser.
Claim 30
Dependent Claim
38 words
The device according to claim 23 wherein said part of the oscillation circuit of means for forming the path of the input current includes only an oscillation inductance element, and said impedance element comprises only an inductance element.
Claim 31
Dependent Claim
59 words
The device according to claim 23 which further comprises a condenser connected in series to said oscillation circuit for cutting DC component, and means connected to said DC cutting condenser and said impedance element for controlling one of a voltage across the DC cutting condenser and a voltage at the impedance element in a direction of dropping the voltage.
Claim 32
Dependent Claim
97 words
The device according to claim 23 wherein said smoothing condenser is provided with a first loop of a current from an output end of said rectifier providing said pulsating DC voltage through at least the smoothing condenser, a normally directioned diode and an oscillation inductance element included in said oscillation circuit to said switching element of the oscillation circuit, and with a second loop of a current from said oscillation inductance element to the smoothing condenser for discharging an energy accumulated in the oscillation inductance element to the smoothing condenser upon OFF operation of said switching element.
Claim 33
Dependent Claim
67 words
The device according to claim 23 wherein said smoothing condenser comprises a series circuit of a first condenser, first diode and second condenser and a second diode connected in inverse parallel to a junction point between one of said first and second condensers and said first diode, the other of said first and second condensers forming part of said chopper circuit and part of said oscillation circuit.
References Cited (Backward Citations)
No citation records indexed.
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