Method for error detection in a drive mechanism
First Claim
1. A method for error detection in a drive mechanism, having a multiphase electric motor and a converter connected upstream thereof, wherein said converter controls voltages of individual phases of said electric motor, and individual phase currents in said individual phases of said electric motor each extend periodically, the method comprising:
- measuring a phase current of said electric motor at a predetermined point of a respective period;
simultaneously varying a voltage that is associated with said measured phase current; and
evaluating a measured value of said measured phase current as a function of said voltage that is associated with said measured phase current.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for error detection in a drive mechanism, having a multiphase electric motor and a converter connected upstream thereof, wherein the converter controls voltages of individual phases of the electric motor, and individual phase currents in the individual phases of the electric motor each extend periodically. The method includes measuring a phase current of the electric motor at a predetermined point of a respective period, simultaneously varying a voltage that is associated with the measured phase current and evaluating a measured value of the measured phase current as a function of the voltage that is associated with the measured phase current.
25 Citations
37 Claims
-
1. A method for error detection in a drive mechanism, having a multiphase electric motor and a converter connected upstream thereof, wherein said converter controls voltages of individual phases of said electric motor, and individual phase currents in said individual phases of said electric motor each extend periodically, the method comprising:
-
measuring a phase current of said electric motor at a predetermined point of a respective period;
simultaneously varying a voltage that is associated with said measured phase current; and
evaluating a measured value of said measured phase current as a function of said voltage that is associated with said measured phase current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
-
Specification