Open-loop or closed-loop control method for a converter
AssigneeSew-Eurodrive GmbH & Co. KG
InventorsHarald Wolf, Wolfgang Hammel
Life of this patent
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Abstract
An open-loop or closed-loop control method for a converter which supplies an electric motor, wherein a current space vector is acquired as motor current, and the motor voltage, in particular a voltage space vector, is set, an induced voltage space vector UI is determined, which is forwarded to an integration element, a flux space vector being generated, whose angular position is perpendicular to the voltage space vector, the amount of the flux space vector corresponding to a predefined nominal value, the difference of the integration result and the flux space vector thus produced being used as feedback in the integration element.
Claims7
An open-loop or closed-loop control method for a converter which supplies an electric motor, comprising:
- acquiring a current space vector as a motor current;
- setting at least one of (a) a motor voltage and (b) a voltage space vector;
- determining an induced voltage space vector;
- forwarding the induced voltage space vector to an integration element;
- generating a flux space vector having an angular position perpendicular to the voltage space vector, an amount of the flux space vector corresponding to a predefined nominal value;
- and
- using a difference of an integration result and the flux space vector generated as feedback in the integration element;
- wherein the integrand encompasses
- U
- _
- I
- =
- U
- _
- S
- -
- R
- S
- ·
- I
- _
- S
- -
- L
- S
- ·
- ⅆ
- I
- _
- S
- ⅆ
- t
- ;
- wherein:
- UI is an induced voltage space vector;
- US-RS is a voltage drop at a stator winding;
- and
- IS-LS is a flux component caused b stator current.
Dependencies are inferred from the claim text.