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US 5,517,403 AGranted
Inverter device
AssigneeMatsushita Electric Works, Ltd.
InventorMinoru Maehara
Life of this patent
Estimating the term…
Abstract
An inverter device is connected to output ends of a full-wave rectifier for full-wave recification of an AC input voltage from an AC power source, and includes an inductance component in a loop formed with a load circuit including an LC resonance series for charging a DC power-source capacitor through one of a pair of switching elements, whereby a high input power factor is maintained while reducing any distortion of input current, and a control of the switching elements which function to restrain any rush current can be simplified.
Claims23
An inverter device comprising an AC power source, a full-wave rectifier for full-wave rectifying an AC input voltage from said AC power source, an inverter connected to output ends of said full-wave rectifier and including a load circuit having an LC resonance series, and a DC power-source capacitor for supplying a DC power to said inverter;
- said inverter including a pair of switching elements for controlling charging and discharging of said DC power-source capacitor, a charging diode for causing a charge current to flow to said DC power-source capacitor upon regeneration of a power at the inverter, a discharging diode for causing a DC current to flow from said DC power-source capacitor to the inverter, an impedance element connected between said output ends of said full-wave rectifier and part of said load circuit in the inverter, and an inductance component provided in a loop for charging said DC power-source capacitor from said AC power source through said full-wave rectifier and one of said pair of switching elements in the inverter.
An inverter device comprising:
- an AC power source;
- a full-wave rectifier DB for full-wave rectifying an AC input voltage from said AC power source;
- a series circuit, connected through a first, forward diode D3 across both output ends of said rectifier DB, of a second, backward diode D4 and a first capacitor C1;
- a series circuit, connected through said first, forward diode D3 across both of said output ends of said rectifier DB, of first switching element Q1 and second switching element Q2;
- a third, forward diode D5 connected between a connecting point of said first and second switching elements Q1 and Q2 and said first capacitor C1;
- a series circuit of an inductor L1, second capacitor C3 and a load circuit and connected across both ends of said second switching element Q2;
- a third capacitor C4 connected through said load circuit across both of said output ends of said rectifier DB;
- and
- an inductance component inserted in a loop for charging said first capacitor C1 from said AC power source through said rectifier DB and first switching element Q1.
6 more elements
An inverter device comprising:
- an AC power source;
- a full-wave rectifier DB for full-wave rectifying an AC input voltage from said AC power source;
- a series circuit, connected through a first, forward diode D3 across both output ends of said rectifier DB, of a second, backward diode D4 and a first capacitor C1;
- a series circuit, connected through said first, forward diode D3 across both of said output ends of said rectifier DB, of first switching element Q1 and second switching element Q2;
- a third, forward diode D5 connected between a connecting point of said first and second switching elements Q1 and Q2 and said first capacitor C1;
- a series circuit of an inductor L1, second capacitor C3 and a discharge lamp and connected across both ends of said second switching element Q2;
- a third capacitor C4 connected through said discharge lamp across both of said output ends of said rectifier DB;
- a fourth capacitor C2 connected through said discharge lamp across both non-source side terminals of said discharge lamp;
- and
- an inductance component inserted in a loop for charging said first capacitor C1 from said AC power source through said rectifier DB and first switching element Q1.
7 more elements
An inverter device comprising:
- an AC power source;
- a full-wave rectifier DB for full-wave rectifying an AC input voltage from said AC power source;
- a series circuit, connected through a first, forward diode D3 across both output ends of said rectifier DB, of a second, backward diode D4 and a first capacitor C1;
- a series circuit, connected through said first, forward diode D3 across both of said output ends of said rectifier DB, of first switching element Q1 and second switching element Q2;
- a third, forward diode D5 connected between a connecting point of said first and second switching elements Q1 and Q2 and said first capacitor C1;
- a series circuit of an inductor L1, second capacitor C3 and a load circuit and connected across both ends of said first switching element Q1;
- a third capacitor C4 connected through said load circuit across both output ends of said rectifier DB;
- and
- an inductance component inserted in a loop for charging said first capacitor C1 from said AC power source through said rectifier DB and second switching element Q2.
6 more elements
An inverter device comprising:
- an AC power source;
- a full-wave rectifier DB for full-wave rectifying an AC input voltage from said AC power source;
- a series circuit, connected through a first, forward diode D3 across both output ends of said rectifier DB, of a second, backward diode D4 and a first capacitor C1;
- a series circuit, connected through said first, forward diode D3 across both of said output ends of said rectifier DB, of first switching element Q1 and second switching element Q2;
- a third, forward diode D5 connected between a connecting point of said first and second switching elements Q1 and Q2 and said first capacitor C1;
- a series circuit of an inductor L1, second capacitor C3 and a discharge lamp and connected across both ends of said first switching element Q1;
- a third capacitor C4 connected through said discharge lamp across both output ends of said rectifier DB;
- a fourth capacitor C2 connected through said discharge lamp across both non-source side terminals of said discharge lamp;
- and
- an inductance component inserted in a loop for charging said first capacitor C1 from said AC power source through said rectifier DB and second switching element Q1.
7 more elements
An inverter device comprising:
- an AC power source;
- a full-wave rectifier DB for full-wave rectifying an AC input voltage from said AC power source;
- a series circuit, connected through a first, forward diode D3 across both output ends of said rectifier DB, of a second, backward diode D4 and a first capacitor C1;
- a series circuit, connected through said first, forward diode D3 across both of said output ends of said rectifier DB, of first switching element Q1 and second switching element Q2;
- a third, forward diode D5 connected between a connecting point of said first and second switching elements Q1 and Q2 and said first capacitor C1;
- a series circuit of an inductor L1, second capacitor C3 and a discharge lamp and connected across both ends of said first switching element Q1;
- a third capacitor C4 connected between one of said output ends of said rectifier DB and said discharge lamp connected to said first, forward diode D3;
- a fourth capacitor C2 connected through said discharge lamp across both non-source side terminals of said discharge lamp;
- and
- an inductance component inserted in a loop for charging said first capacitor C1 from said AC power source through said rectifier DB and second switching element Q2.
7 more elements
An inverter device comprising:
- an AC power source;
- a full-wave rectifier DB for full-wave rectifying an AC input voltage from said AC power source;
- a series circuit, connected through a first, forward diode D3 across both output ends of said rectifier DB, of a second, backward diode D4 and a first capacitor C1;
- a series circuit, connected through said first, forward diode D3 across both of said output ends of said rectifier DB, of first switching element Q1 and second switching element Q2;
- a third, forward diode D5 connected between a connecting point of said first and second switching elements Q1 and Q2 and said first capacitor C1;
- a series circuit of an inductor L1, second capacitor C3 and a load circuit and connected across both ends of said first switching element Q1;
- a third capacitor C4 connected between one of said output ends of said rectifier DB and said load circuit connected to said first, forward diode D3;
- and
- an inductance component inserted in a loop for charging said first capacitor C1 from said AC power source through said rectifier DB and first switching element Q1.
6 more elements
An inverter device comprising:
- an AC power source;
- a full-wave rectifier DB for full-wave rectifying an AC input voltage from said AC power source;
- a series circuit, connected through a first, forward diode D3 across both output ends of said rectifier DB, of a second, backward diode D4 and a first capacitor C1;
- a series circuit, connected through said first, forward diode D3 across both of said output ends of said rectifier DB, of first switching element Q1 and second switching element Q2;
- a third, forward diode D5 connected between a connecting point of said first and second switching elements Q1 and Q2 and said first capacitor C1;
- a series circuit of an inductor L1, second capacitor C3 and a discharge lamp and connected across both ends of said first switching element Q1;
- a third capacitor C4 connected between one of said output ends of said rectifier DB and the series circuit of said second capacitor C3 and said discharge lamp connected to said first, forward diode D3;
- a fourth capacitor C2 connected through said discharge lamp across both non-source side terminals of said discharge lamp;
- and
- an inductance component inserted in a loop for charging said first capacitor C1 from said AC power source through said rectifier DB and first switching element Q1.
7 more elements
Dependencies are inferred from the claim text.