Control of a rotating field machine
AssigneeZF Friedrichshafen AG
InventorsHans-Jürgen Hanft, Erich Karg, Alfred Tareilus
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Abstract
The current embodiments provide a method for controlling an induction machine with a plurality of phases. Each phase may include a plurality of parallel windings and each phase may be associated with a half-bridge. The method may include determining a current in a winding of a first phase. The method may further include determining a phase current on the basis of the current in the winding, and controlling the half-bridge associated with the first phase based on the determined phase current.
Claims20
A method for controlling an induction machine with a plurality of phases,
- wherein each phase of the plurality of phases includes a plurality of parallel windings, and
- wherein each phase is associated with a half-bridge, the method comprising:
- determining a current in a single winding of the plurality of parallel windings, the plurality of windings being associated with a first phase of the plurality of phases;
- determining a phase current on a basis of the current in the single winding;
- and
- controlling the half-bridge associated with the first phase based on the phase current determined on the basis of the current in the single winding.
A control device for an induction machine with a plurality of phases, wherein each phase of the plurality of phases comprises a plurality of parallel windings, the control device comprising:
- a half-bridge associated with a first phase of the plurality of phases;
- a processing device to control the half-bridge based on a phase current flowing through the first phase;
- and
- a current sensor electrically connected to the processing device,
- wherein the current sensor is configured to determine a current that is flowing through a first winding of the plurality of parallel windings of the first phase, and wherein the processing device is configured to determine the phase current on a basis of the current in the first winding without measuring the current flowing through at least one winding of the plurality of windings.
A control system for controlling an induction machine including a plurality of phases, the control system comprising:
- a plurality of half-bridges, each half-bridge of the plurality of half-bridges being associated with one phase of the plurality of phases of the induction machine;
- a first current sensor configured to determine a first current flowing through a first winding of a first plurality of windings, wherein a first phase of the plurality of phases comprises the first plurality of windings;
- and
- a control device electrically connected to the first current sensor, wherein the control device is configured to determine a first phase current based only on the first current, and wherein the control device is configured to control a first half-bridge of the plurality of half-bridges, based on the first phase current, the first half-bridge being associated with the first phase.
Dependencies are inferred from the claim text.