Circuit Arrangement for Supplying Variable Loads from Three Phases

• US 20080179952A1
• Filed: 01/17/2008
• Published: 07/31/2008
• Est. Priority Date: 01/18/2007
• Status: Active Grant

• Current Assignee: AEG Power Solutions BV (3W Power Holdings Limited)
• Original Assignee: AEG Power Supply Systems GmbH
• Inventors: Vollmar, Wilfried, Liese, Michael Harro
• Granted Patent: US 7,851,942 B2
• Time in Patent Office: Days
• US Class Current: 307/31
• CPC Class Codes: H02M 5/12 for conversion of voltage or current amplitude only
• CPC Class Codes: H02M 5/2573 with control circuit

Abstract

Disclosed is a circuit arrangement for supplying variable loads (I11, I2, M1, M2, O1, O2, O3) from three phases (L1, L2, L3), with a circuit arrangement having four groups of terminals (A11, A12, A13, A14; A21, A22, A23, A24; A31, A32; A41, A42, A43) for the loads (I1, I2, M1, M2, O1, O2, O3) which are subsequently designated as terminal groups; the circuit arrangement is suitable and set up for supplying the terminals (A21, A22, A23, A24) of the second terminal group from the first phase (L1); the circuit arrangement is suitable and set up for supplying the terminals (A41, A42, A43) of the fourth terminal group from a second phase (L2); the circuit arrangement is suitable and set up for supplying the terminals (A11, A12, A13) of the first terminal group and the third terminal group (A31, A32) from a third phase (L3); the circuit arrangement is suitable and set up for controlling the voltage of the four terminal groups, and exhibits three control loops for this purpose.

Claims

1. A circuit arrangement for supplying variable loads (I1, I2, M1, M2, O1, O2, O3) from three phases (L1, L2, L3), comprising

a circuit arrangement including four groups of terminals (A11, A12, A13, A14;

A21, A22, A23, A24;

A31, A32;

A41, A42, A43) for loads (I1, I2, M1, M2, O1, O2, O3), the loads are subsequently designated as terminal groups;

the circuit arrangement is capable of supplying the terminals (A21, A22, A23, A24) of the second terminal group from the first phase (L1);

the circuit arrangement is capable of supplying the terminals (A41, A42, A43) of the fourth terminal group from a second phase (L2);

the circuit arrangement is capable of supplying the terminals (A11, A12, A13) of the first terminal group and the third terminal group (A31, A32) from a third phase (L3);

the circuit arrangement capable of controlling the voltage of the four terminal groups,

wherein

a first control loop is allocated to the first terminal group and the first control loop comprises a first controller and a first group of controllable switching means (S111 to S132) for setting the voltage as actuators, which is subsequently designated as first group of switching means,

a second control loop is allocated to the second terminal group and the second control loop comprises a second controller and a second group of controllable switching means (S211 to S231) for setting the voltage as actuators which is subsequently designated as second group of switching means,

a common third control loop is allocated to the third terminal group and the fourth terminal group and the third control loop comprises a third controller and a third group of controllable switching means (S311 to S345) for setting the voltage as actuators, which is subsequently designated as third group of switching means.

2. The circuit arrangement according to claim 1, wherein the controllable switching means (S111 to S345) are thyristors.

3. The circuit arrangement according to claim 2, wherein the first group of switching means (S111 to 132) is capable of alternating between a parallel supply and a series supply of the loads (I1, I2) which can be connected to the first terminal group.

4. The circuit arrangement according to claim 2, wherein the second group of switching means (S211 to S232) is suitable and set up for alternating between a parallel supply and a series supply of the loads (M1, M2) which can be connected to the second terminal group.

5. The circuit arrangement according to claim 2 wherein the third group of switching means (S311 to S345) is suitable and set up for alternating between a parallel supply and a series supply of the loads (O1, O2, O3) which can be connected to the third and the fourth terminal group.

6. The circuit arrangement according to claim 2, wherein the switching means of the first group of switching means are suitable and set up for switching currents from the third phase (L3).

7. The circuit arrangement according to claim 2, wherein the switching means of the second group of switching means are suitable and set up for switching currents from the first phase (L1).

8. The circuit arrangement according to claim 2, wherein a first subgroup of switching means (S311 to S331) of the third group of switching means is suitable and set up for switching currents from the second phase (L2).

9. The circuit arrangement according to claim 2, wherein a second subgroup of switching means (S341 to S345) of the third group of switching means is suitable and set up for switching currents from the third phase (L3).

10. The circuit arrangement according to claim 9, wherein the lowest voltage, which can be set by the switching means of the first group of switching means (S111 to S132) or the second subgroup (S341 to S345) of the third group of switching means is half as large as the voltage which can be set by the switching means of the second group (S211 to S232) and the first subgroup (S311 to S331) of the third group of switching means.

11. An arrangement of a circuit arrangement according to claim 1 and variable loads (I1, I2, M1, M2, O1, O2, O3), wherein a first group (I1, I2) of the loads (I1, I2, M1, M2, O1, O2, O3) is connected to the terminals (A11, A12, A13, A14) of the first terminal group, a second group (M1, M2) of the loads (I1, I2, M1, M2, O1, O2, O3) is connected to the terminals (A21, A22, A23, A24) of the second terminal group, and a third group (O1, O2, O3) of the loads (I1, I2, M1, M2, O1, O2, O3) is connected to the terminals (A31, A32) of the third terminal group and the terminals (A41, A42, A43) of the fourth terminal group.

12. The arrangement according to claim 11, wherein the resistance of the loads (M1, M2;

O1, O2) connected to the second and the fourth terminal group is equally large.

13. The arrangement according to claim 12, wherein the resistance of the loads (I1, I2;

O3) connected to the first and the third terminal group is equally large.

14. The arrangement according to claim 12, wherein the total resistance of the loads (I1, I2;

O3) connected to the first and the third terminal group is equal to the resistance of the loads (M1, M2;

O1, O2) connected to the second or the fourth terminal group.

16. The arrangement according to claim 13, wherein the total resistance of the loads (I1, I2;

O3) connected to the first and the third terminal group is equal to the resistance of the loads (M1, M2;

O1, O2) connected to the second or the fourth terminal group.