Control device for a three-phase machine and method for operating the control device
First Claim
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1. A control device for a three-phase machine, the control device comprising:
- an inverter having an input side for connecting to a direct voltage source and an output side for connecting to the three-phase machine;
a capacitor; and
a reactive power converter having an output side terminated by said capacitor and an input side connected electrically parallel to said input side of said inverter.
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Abstract
A control device for a three-phase machine contains an inverter, which can be connected on the input side to a direct voltage source and on the output side to the three-phase machine. The control device further has a reactive power converter, which on the output side is terminated by a capacitor and on the input side is disposed electrically parallel to the inverter, namely on the input side of the inverter.
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Citations
10 Claims
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1. A control device for a three-phase machine, the control device comprising:
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an inverter having an input side for connecting to a direct voltage source and an output side for connecting to the three-phase machine;
a capacitor; and
a reactive power converter having an output side terminated by said capacitor and an input side connected electrically parallel to said input side of said inverter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for operating a control device of a three-phase machine, the control device containing an inverter having an input side for connecting to a direct voltage source and an output side for connecting to the three-phase machine, a capacitor, and a reactive power converter having an output side terminated by the capacitor and an input side connected electrically parallel to the input side of the inverter, which comprises the steps of:
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determining or predetermining an alternating component of an input-side current of the inverter without a presence of the reactive power converter; and
activating the reactive power converter for compensating for the alternating component of the input-side current of the inverter.
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Specification