Method and device for actuating an electric machine, and electric drive system
OwnerThomas Zeltwangerinventor
Life of this patent
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Abstract
The invention relates to the actuation of an electric machine with a change between time-synchronous PWM clocking and angle-synchronous block clocking It is proposed to provide an angle-synchronous clocking with adjustable voltage indicator length for the transition. In this way, jumps in the operating behavior of the electric machine can be minimized or optionally prevented completely during a change between time-synchronous clocking and angle-synchronous clocking.
Claims10
A method for actuating an electric machine (30), the method comprising the following steps:
- actuating (S1) the electric machine (30) in a first operating mode using a time synchronous clocking with a predetermined maximum first voltage vector length;
- actuating (S2) the electric machine (30) in a second operating mode using an angle synchronous clocking with an adjustable second voltage vector length;
- and
- actuating (S3) the electric machine (30) in a third operating mode using an angle synchronous block clocking with a predetermined third voltage vector length.
A device (10) for actuating an electric machine (30), having:
- a power converter (11) which is configured to be coupled to an electric machine (30) and to provide an electric voltage for actuating the electric machine (30);
- and
- a control device (12) which is electrically coupled to the power converter (11) and which is configured to provide control signals for actuating the power converter (11),
- wherein the control device (12) is configured
- to actuate the electric machine (30) in a first operating mode using a time synchronous clocking with a predetermined maximum first voltage vector length,
- to actuate the electric machine (30) in a second operating mode using an angle synchronous clocking with an adjustable second voltage vector length, and
- to actuate the electric machine (30) in a third operating mode using an angle synchronous block clocking with a predetermined third voltage vector length.
An electric drive system (1), comprising:
- a power converter (11) which is configured to be coupled to an electric machine (30) and to provide an electric voltage for actuating the electric machine (30);
- and
- a control device (12) which is electrically coupled to the power converter (11) and which is configured to provide control signals for actuating the power converter (11), wherein the control device (12) is further configured
- to actuate the electric machine (30) in a first operating mode using a time synchronous clocking with a predetermined maximum first voltage vector length,
- to actuate the electric machine (30) in a second operating mode using an angle synchronous clocking with an adjustable second voltage vector length, and
- to actuate the electric machine (30) in a third operating mode using an angle synchronous block clocking with a predetermined third voltage vector length, and an electric machine (30) which is electrically coupled to the power converter (11) of the device (10) for actuating the electric machine (30).
Dependencies are inferred from the claim text.