Method for operating a direction-of-rotation sensorless electric motor
AssigneeSchaeffler Technologies AG & Co. KG
InventorsErhard Hodrus, Christian Eberle, Alexander Rösch
Life of this patent
Estimating the term…
Abstract
A method of operating a direction-of-rotation sensorless electric motor comprising a stator and a rotor, injected signals being used to determine rotational speeds of the electric motor, is characterized in that the rotational direction of the electric motor is determined and defined measures are taken if an unwanted rotational direction is actually determined or if an unwanted rotation direction is mistakenly determined.
Claims18
A method for operating a direction-of-rotation sensorless electric motor having a stator and a rotor, injected signals being used to determine rotational speeds of the electric motor, comprising:
- determining the rotational direction of the electric motor implementing defined measures when an unwanted rotational direction is determined or if an unwanted rotational direction is mistakenly determined.
A method for operating a direction-of-rotation sensorless electric motor comprising:
- injecting one or more signals into the electric motor;
- determining, with the injected one or more signals, the rotational direction of the electric motor immediately after the occurrence of a special situation;
- and
- implementing one or more defined measures when an unwanted rotational direction is determined or when an unwanted rotational direction is mistakenly determined,
- wherein a defined measure comprises at least one of shorting a circuit or closing valves of a hydraulic system.
A controller configured to execute software instructions for operating a direction-of-rotation sensorless electric motor having a stator and a rotor, injected signals being used to determine rotational speeds of the electric motor, wherein the software instructions are configured to execute the steps comprising:
- determining the rotational direction of the electric motor immediately after the occurrence of a special situation;
- and
- implementing one or more defined measures when an unwanted rotational direction is determined or when an unwanted rotational direction is mistakenly determined,
- wherein a defined measure comprises at least one of shorting a circuit or closing valves of a hydraulic system.
Dependencies are inferred from the claim text.