Electric drive system
First Claim
1. An electric drive system (30), comprising:
- an n-phase electric machine (6), n>
1, having at least two multiphase winding strands (6a, 6b);
a first inverter (3a), output connections of which are connected to the phase connections of a first of the multiphase winding strands (6a, 6b) of the electric machine (6);
a second inverter (3b), the output connections of which are connected to the phase connections of a second of the multiphase winding strands (6a, 6b) of the electric machine (6);
a DC voltage source (1), which has a plurality of battery modules (5) connected in series and a first output connection of which is connected to a first input connection of the first inverter (3a) and a second output connection of which is connected to the first input connection of the second inverter (3b); and
a first DC voltage intermediate circuit (2a) connected to the first input connection of the first inverter (3a) and to a second input connection of the first inverter (3a),wherein the second input connection of the first inverter (3a) and a second input connection of the second inverter (3b) are connected to each other such that the first inverter (3a) and the second inverter (3b) are arranged in a series circuit, andwherein the second input connection of the first inverter (3a) and the second input connection of the second inverter (3b) are connected to a center tap (M) of the DC voltage source (1) between two sub-groups of the battery modules (5) connected in series.
1 Assignment
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Accused Products
Abstract
The invention relates to an electric drive system with an n-phase electric machine, n>1, having at least two multiphase winding strands; a first inverter, the output connections of which are connected to the phase connections of a first of the multiphase winding strands of the electric machine; a second inverter, which is connected in parallel to the first inverter and the output connections of which are connected to the phase connections of a second of the multiphase winding strands of the electric machine; and a DC voltage source, which has a plurality of battery modules connected in series and a first output connection of which is connected to a first input connection of the first inverter and second output connection of which is connected to a first input connection of the second inverter. A second input connection of the first inverter and a second input connection of the second inverter are connected to each other such that the first inverter and the second inverter are arranged in a series circuit, and the second input connection of the first inverter and the second input connection of the second inverter are connected to a center tap of the DC voltage source between two sub-groups of the battery modules connected in series.
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Citations
12 Claims
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1. An electric drive system (30), comprising:
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an n-phase electric machine (6), n>
1, having at least two multiphase winding strands (6a, 6b);a first inverter (3a), output connections of which are connected to the phase connections of a first of the multiphase winding strands (6a, 6b) of the electric machine (6); a second inverter (3b), the output connections of which are connected to the phase connections of a second of the multiphase winding strands (6a, 6b) of the electric machine (6); a DC voltage source (1), which has a plurality of battery modules (5) connected in series and a first output connection of which is connected to a first input connection of the first inverter (3a) and a second output connection of which is connected to the first input connection of the second inverter (3b); and a first DC voltage intermediate circuit (2a) connected to the first input connection of the first inverter (3a) and to a second input connection of the first inverter (3a), wherein the second input connection of the first inverter (3a) and a second input connection of the second inverter (3b) are connected to each other such that the first inverter (3a) and the second inverter (3b) are arranged in a series circuit, and wherein the second input connection of the first inverter (3a) and the second input connection of the second inverter (3b) are connected to a center tap (M) of the DC voltage source (1) between two sub-groups of the battery modules (5) connected in series. - View Dependent Claims (2, 3, 4, 10)
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5. An electric drive system (30) comprising:
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an n-phase electric machine (6), n>
1, having at least two multiphase winding strands (6a, 6b);a first inverter (3a), output connections of which are connected to the phase connections of a first of the multiphase winding strands (6a, 6b) of the electric machine (6); a second inverter (3b), the output connections of which are connected to the phase connections of a second of the multiphase winding strands (6a, 6b) of the electric machine (6); a DC voltage source (1), which has a plurality of battery modules (5) connected in series and a first output connection of which is connected to a first input connection of the first inverter (3a) and a second output connection of which is connected to the first input connection of the second inverter (3b); at least one third inverter (3c) connected in parallel to the first inverter (3a), input connections of which are each coupled to input connections of the first inverter (3a); and at least one fourth inverter (3d) which is connected in parallel to the second inverter (3b) and the input connections of which are each coupled to input connections of the second inverter (3b), wherein a second input connection of the first inverter (3a) and a second input connection of the second inverter (3b) are connected to each other such that the first inverter (3a) and the second inverter (3b) are arranged in a series circuit, and wherein the second input connection of the first inverter (3a) and the second input connection of the second inverter (3b) are connected to a center tap (M) of the DC voltage source (1) between two sub-groups of the battery modules (5) connected in series. - View Dependent Claims (6, 7, 8, 9)
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11. An electric drive system (30) comprising:
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an n-phase electric machine (6), n>
1, having at least four multiphase winding strands (6a, 6b, 6c, 6d);a first inverter (3a), output connections of which are connected to the phase connections of a first of the multiphase winding strands (6a) of the electric machine (6); a second inverter (3b), output connections of which are connected to the phase connections of a second of the multiphase winding strands (6b) of the electric machine (6); a third inverter (3c), output connections of which are connected to the phase connections of a third of the multiphase winding strands (6c) of the electric machine (6); a fourth inverter (3d), output connections of which are connected to the phase connections of a fourth of the multiphase winding strands (6d) of the electric machine (6); and a DC voltage source (1), which has a plurality of battery modules (5) connected in series and a first output connection of which is connected to a first input connection of the first inverter (3a) and a first input connection of the third inverter (3c), and a second output connection of which is connected to the first input connection of the second inverter (3b) and a first input connection of the fourth inverter (3d) wherein the second input connection of the first inverter (3a) and the second input connection of the third inverter (3c) are connected to a first center tap (M) of the DC voltage source (1) between two sub-groups of the battery modules (5) connected in series. - View Dependent Claims (12)
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Specification