Brushless electric motor
An electric motor has a stator having a bearing tube made of a magnetically transparent material; it also has a rotor having a rotor shaft that is at least partially journaled in the bearing tube, and has a ring magnet that is fixedly arranged on the rotor shaft inside the bearing tube. Two magnetic...
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| Main Authors | , , |
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| Format | Patent |
| Language | English |
| Published |
22.02.2011
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| Online Access | Get full text |
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| Summary: | An electric motor has a stator having a bearing tube made of a magnetically transparent material; it also has a rotor having a rotor shaft that is at least partially journaled in the bearing tube, and has a ring magnet that is fixedly arranged on the rotor shaft inside the bearing tube. Two magnetic-field-dependent analog sensors (″) are arranged on a circuit board outside the bearing tube, at an angular distance (PHI) from one another, in order to generate rotor position signals as a function of the rotational position of the ring magnet. A corresponding device that serves to control the motor is provided, in order to process these rotor position signals into a signal that indicates the absolute rotational position of the rotor. |
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