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US 8,804,384 B2Granted
Converter for powering electric motor
AssigneeSew-Eurodrive GmbH & Co. KG
InventorsThomas Schuster, Harald Wolf
Life of this patent
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Abstract
A converter includes at least device(s) for sensing the currents fed to the electric motor powered by the converter, the device(s) for current detection being arranged inside the converter, and the signals of the device(s) being fed to a nonlinear filter, whose output signals are fed to an additional filter that is connected to an analog-to-digital converter.
Claims7
A converter, comprising:
- a device adapted to sense currents fed to an electric motor powered by the converter, the device arranged inside the converter,
- wherein signals of the device are fed to a nonlinear filter and output signals of the nonlinear filter are fed to an additional filter that is connected to an analog-to-digital converter;
- and
- wherein maximum slopes of the output signals of the nonlinear filter are configured to have magnitudes greater than maximum slopes of a motor-current characteristic of the electric motor.
1 more element
Dependencies are inferred from the claim text.