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Paramétrages

Paramétrages

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1. WO2016083143 - CONVERTISSEUR DE PUISSANCE C.C.-C.A.

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1. DC-to-AC power converter (1 ) having a main DC input (10) and a main single phase AC output (20), able to convert and adapt a DC voltage at said main DC input (10) into a sinusoidal AC voltage VoutAC of fundamental frequency /„ at said main AC output (20), and able to deliver a rated power at said main AC output (20), comprising:

- a first DC-to-DC converter (30) having as input said main DC input (10) and having a first DC output (35);

- a bidirectional voltage-type DC-to-AC converter (50) having a first DC input- output (60) connected in parallel to the first DC output (35) and a first AC output-input (65) connected in parallel to the main AC output (20);

- a tank capacitor (40) connected in parallel to said first DC output (35);

wherein said main DC input (10) has a first terminal (1 1 ) and a second terminal (12);

characterised in that said DC-to-AC power converter (1 ) further comprises:

- a current-type DC-to-AC converter (70) having a first DC input (80) and a first AC output (85), said first DC input (80) being connected in parallel to said main DC input (10) and said first AC output (85) being connected in parallel to said main AC output (20); and

- control means (1 10) for:

- controlling said bidirectional voltage-type DC-to-AC converter (50) for delivering at said first AC output-input (65) a sinusoidal AC voltage of said fundamental frequency f0;

- controlling said current-type DC-to-AC converter (70) for delivering at said first AC output (85) a quasi square-type AC current of said fundamental frequency f0 and in phase with said sinusoidal AC voltage;

- imposing that at least 50% of said rated power is provided by said current-type DC-to-AC converter (70).

2. DC-to-AC power converter (1 ) according to claim 1 , wherein said sinusoidal AC voltage at said main single phase AC output (20) has a varying instantaneous value VoutAC (t) and a peak value VoutAC (max);

characterised in that said control means (1 10) are also able to control said first

DC-to-DC converter (30) and said current-type DC-to-AC converter (70) for

charging the tank capacitor (40) from the main DC input (1 0) through the first DC-to-DC converter (30) when
\ < 0.40Vt ti4C(max) .

3. DC-to-AC power converter (1 ) according to claim 1 or 2, characterised in that:

- said first DC-to-DC converter (30) is an isolated converter and comprises:

- a primary circuit (200) having as input said main DC input (1 0), having a primary output (210), said primary output (210) having a first primary terminal (21 1 ) and a second primary terminal (212) that is directly connected to said second terminal (12), comprising:

an input inductance (300) and a primary capacitor (31 0) connected in series between the first terminal (1 1 ) and the first primary terminal (21 1 );

input switching means (320) for alternately connecting and disconnecting a junction between said input inductance (300) and said primary capacitor (310) to a junction between the second terminal (1 2) and the second primary terminal (21 2);

- a first secondary circuit (220) having a first secondary input (230) and as output said first DC output (35); in that

- said current-type DC-to-AC converter (70) is an isolated converter and comprises:

- same primary circuit (200);

- a second secondary circuit (240) for providing at said first AC output (85) a positive alternation of said quasi square-type AC current, having a second secondary input (250) and a second secondary output (255), said second secondary output (255) being connected in parallel to said first

AC output (85),

- a third secondary circuit (260) for providing at said first AC output (85) a negative alternation of said quasi square-type AC current, having a third secondary input (270) and a third secondary output (275), said third secondary output (275) being connected in parallel to said first AC output

(85); and in that

- said DC-to-AC power converter (1 ) further comprises an isolated transformer (400) for magnetically linking said primary output (210) to said first (230), second (250) and third (270) secondary inputs respectively.

4. DC-to-AC power converter (1 ) according to claim 3, wherein:

- said first AC output (85) has a third terminal (86) and a fourth terminal (87),

- said second secondary input (250) has a fifth terminal (251 ) and a sixth terminal (252) that is directly connected to said fourth terminal (87);

characterised in that:

- said third secondary input (270) has same sixth terminal (252) and a eighth terminal (272);

- said second secondary circuit (240) comprises:

- a first secondary capacitor (500) and a first secondary inductance (510) wherein said first secondary capacitor (500) is connected in series between said fifth terminal (251 ) and said first secondary inductance (510), said first secondary inductance (510) being connected with said third terminal (86);

- first secondary switching means (520) for alternately disconnecting and connecting through a first secondary diode (530) a junction between said first secondary capacitor (500) and said first secondary inductance (510) to a junction between said fourth terminal (87) and said sixth terminal (252); in that

- said third secondary circuit (260) comprises:

- a second secondary capacitor (600) and a second secondary inductance (610) wherein said second secondary capacitor (600) is connected in series between said eighth terminal (272) and said second secondary inductance (610), said second secondary inductance (610) being connected with said third terminal (86);

- second secondary switching means (620) for alternatively disconnecting and connecting through a second secondary diode (630) a junction between said second secondary capacitor (600) and said second secondary inductance (610) to a junction between said fourth terminal (87) and said sixth terminal (252).

5. DC-to-AC power converter (1 ) according to claim 3, wherein:

- said first AC output (85) has a third terminal (86) and a fourth terminal (87),

- said second secondary input (250) has a fifth terminal (251 ) and a sixth terminal (252);

characterised in that

- said third secondary input (270) has same sixth terminal (252) and a eighth terminal (272); in that

- said second secondary circuit (240) comprises :

- a secondary capacitor (700) that is connected in series between said sixth terminal (252) and fourth terminal (87);

- a first secondary inductance (510) that is connected in series between said fifth terminal (251 ) and said third terminal (86);

- first secondary switching means (520) for alternatively disconnecting and connecting through a first secondary diode (530) said fifth terminal (251 ) to a junction between said secondary capacitor (700) and said fourth terminal (87); in that

- said third secondary circuit (260) comprises :

- same secondary capacitor (700) that is connected in series between said sixth terminal (252) and fourth terminal (87);

- a second secondary impedance (610) that is connected in series between said eighth terminal (272) and said third terminal (86);

- second secondary switching means (620) for alternatively disconnecting and connecting through a second secondary diode (630) said eighth terminal (272) to a junction between said secondary capacitor (700) and said fourth terminal (87).

6. DC-to-AC power converter (1 ) according to anyone of claims 3 to

5, wherein:

- said first secondary input (230) has a ninth terminal (231 ) and a tenth terminal (232),

- said first DC output (35) has an eleventh terminal (236) and a twelfth terminal (237);

characterised in that:

- said isolated transformer (400) has:

- a primary winding ;

- a first, a second, and a third secondary windings, of turn ratios with respect to said primary winding 1 :T, 1 :N, and 1 :N respectively; in that

- said primary winding is connected to said primary output (210); in that

- said first secondary winding is connected to said first secondary input (230); in that

- said second secondary winding is connected to said second secondary input (250); in that

- said third secondary winding is connected to said third secondary input (270); in that

- said first secondary circuit (220) comprises a diode (225) that is connected in series between said ninth terminal (231 ) and eleventh terminal (236); in that

- said tenth terminal (232) is connected to said twelfth terminal (237); in that

VoutAC(max) '

wherein VDC is a constant voltage value across said tank capacitor (40).

7. DC-to-AC power converter (1 ) according claim 6, characterised

VDC

in that T = N

V out AC (max)