EC motor and method for operating same
First Claim
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1. A method for operating an EC motor, comprising:
- recording a plurality of position-measurement signals using a position-measuring device;
ascertaining at least one correction value for at least one position-measurement error contained in the position-measurement signals;
storing the at least one correction value;
determining commutation instants based on the position-measurement signals and taking into account the at least one correction value so as to compensate for the at least one position-measurement error; and
commutating current supply to the EC motor at the commutation instants.
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Abstract
In a method for operating an EC motor, position-measurement signals are recorded by a position-measuring device, and, on the basis of the position-measurement signals, commutation instants are determined, at which the current supply to the EC motor is commutated. At least one correction value for at least one position-measurement error contained in the position-measurement signals is ascertained and stored. To compensate for the at least one position-measurement error, the correction value is considered when determining the commutation instants.
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Citations
26 Claims
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1. A method for operating an EC motor, comprising:
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recording a plurality of position-measurement signals using a position-measuring device; ascertaining at least one correction value for at least one position-measurement error contained in the position-measurement signals; storing the at least one correction value; determining commutation instants based on the position-measurement signals and taking into account the at least one correction value so as to compensate for the at least one position-measurement error; and commutating current supply to the EC motor at the commutation instants. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An EC motor comprising:
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a stator having a winding including a plurality of phases; an armature movable relative to the stator and having a plurality of permanent-magnetic poles; a driving device having at least one measurement-signal input and a plurality of control-signal outputs linked via an output stage to the winding so as to control a current supply to the winding phases; and a position-measuring device for recording a position of the poles relative to the phases of the winding and having at least one measurement-signal output linked to the at least one measurement-signal input to carry a plurality of measurement signals for electronically commutate the EC motor; wherein the measurement signals contain at least one position-measurement error, wherein the driving device has a correction-value memory for storing at least one correction value, and wherein the driving device has a compensating device communicating with the at least one measurement-signal input, the correction-value memory and the control-signal outputs, to compensate for the at least one position-measurement error. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification