Control device and method for reducing the commutation angle error of an ec motor
Assigneeebm-papst Mulfingen GmbH & Co. KG
InventorsJens Krotsch, Thomas LEY, Hiren GONDALIYA
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Abstract
A control device (1) is configured to reduce the commutation angle error ε of a three-phase (u, v, w) EC motor (2.2) connected via a y-configuration. The three phases (u, v, w) are commutated via a motor control (3) including a rotor position sensor (4) and a control circuit (10). The rotor position sensor (4) senses the relative angular position of the rotor using the neutral-point potential at the neutral point of the y-configuration. The control circuit (10) is configured to impose a desired field weakening current component on the motor control (3) for reducing the commutation angle error ε.
Claims11
A control device configured to reduce the commutation angle error ε of a three-phase EC motor connected in a y-configuration, the three phases being commutated via a motor control, including a rotor position sensor for sensing the relative angular position of the rotor using the neutral-point potential at the neutral point of the y-configuration as well as a control circuit configured to impose a desired field weakening current component on the motor control for reducing the commutation angle error ε.
Dependencies are inferred from the claim text.