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); 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 second output connection of which is connected to the first input connection 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, 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
5 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); 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 second output connection of which is connected to the first input connection 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 (2, 3, 4, 5)
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Specification