A method for determining an interrupted motor phase of an electric motor having at least three windings by means of a control unit is disclosed, wherein voltages induced in the windings are determined on outer conductors of the electric motor by means of at least one measuring unit, wherein the measuring unit is connected to at least one outer conductor of the electric motor via at least one resistor, the induced voltages of the outer conductors of the electric motor are compared with one another, and an interrupted motor phase is registered if the induced voltage differs or if a frequency of the induced voltage differs. A control unit, a computer program and a machine-readable storage medium are also disclosed.

An oral appliance is provided for delivering a medicament to at least a portion of teeth and/or soft tissue areas inside a mouth. The oral appliance contains an interior surface having a medicament disposed in or on at least a portion of and/or the entire interior surface of the oral appliance. The interior surface of the oral cavity is formed to fit contours of at least the portion of the teeth and/or soft tissue areas inside the oral cavity and is configured for holding the medicament in contact with at least the portion of the teeth and/or soft tissue areas inside the oral cavity to deliver the medicament to strategic areas in need of treatment. In some embodiments, computer, network and computer readable storage media are provided.

An oral appliance is provided for delivering a medicament to at least a portion of teeth and/or soft tissue areas inside a mouth. The oral appliance contains an interior surface having a medicament disposed in or on at least a portion of and/or the entire interior surface of the oral appliance. The interior surface of the oral cavity is formed to fit contours of at least the portion of the teeth and/or soft tissue areas inside the oral cavity and is configured for holding the medicament in contact with at least the portion of the teeth and/or soft tissue areas inside the oral cavity to deliver the medicament to strategic areas in need of treatment. In some embodiments, computer, network and computer readable storage media are provided.

An unmanned aerial vehicle (UAV) includes a UAV body, and a stabilizing platform mounted on the UAV body and configured to stabilize a payload device. The stabilizing platform includes a frame assembly adapted to hold the payload device and a brushless motor coupled to the frame assembly. The brushless motor is configured to directly drive the frame assembly in response to one or more motor signals to allow the payload device to rotate around at least one of a pitch axis, a roll axis, or a yaw axis of the payload device. A brushless motor includes a rotor housing; a stator disposed within the rotor housing; and a linear Hall effect sensor. A posture of the payload device is controlled by adjusting a rotational angle of the brushless motor, and the rotational angle of the brushless motor is determined using the linear Hall effect sensor.

An unmanned aerial vehicle (UAV) includes a UAV body, and a stabilizing platform mounted on the UAV body and configured to stabilize a payload device. The stabilizing platform includes a frame assembly adapted to hold the payload device and a brushless motor coupled to the frame assembly. The brushless motor is configured to directly drive the frame assembly in response to one or more motor signals to allow the payload device to rotate around at least one of a pitch axis, a roll axis, or a yaw axis of the payload device. A brushless motor includes a rotor housing; a stator disposed within the rotor housing; and a linear Hall effect sensor. A posture of the payload device is controlled by adjusting a rotational angle of the brushless motor, and the rotational angle of the brushless motor is determined using the linear Hall effect sensor.

An electric fan with a self-cleaning mode to energise rotating fan blades in alternate forward and reverse directions to create a vibration in order to shake built-up dust or dirt particles from the blades in a frequency at which the rotational direction is alternated set to a known or detected resonant frequency of the blades thereby excite resonant modes and maximise the amplitude of vibrations. The self-cleaning operation may be triggered by detection of excessive/abnormal loading on the motor. The fan may be operated in a vibration detecting mode over a range of rotational speeds to locate speeds that produce resonance, or to detect a fault with the fan. Motor reversal frequencies corresponding to resonance-inducing speeds may be used in the self-cleaning mode. The vibration detecting mode may be carried out while the at least one blade is rotated in a direction opposite to its normal operational rotational direction.

In an electric motor, a magnetic bearing generates an electromagnetic force between multiple permanent magnets and a coil and rotatably supports an other side of a rotation shaft in an axis line direction. The rotation shaft is configured to be capable of being inclined with a rotation center line using a bearing side of the rotation shaft as a fulcrum. An electronic control device controls a current that flows to the coil such that an axis line of the rotation shaft approaches the rotation center line due to a supporting force which is the electromagnetic force between the multiple permanent magnets and the coil. Accordingly, the rotation shaft is rotatably supported to be freely rotatable by a magnetic bearing and the bearing.

The electric motor includes at least two opposing magnet sets, at least a coil assembly, and a detection switch circuit. Each magnet set includes at least a magnet whose poles are arranged perpendicular to the movement of the magnet. The magnets in a same magnet set are stacked and have poles on a same side of reversed polarities. Opposing magnets from neighboring magnet sets have facing poles of a same polarity. The coil assembly is disposed between neighboring magnet sets, and axially parallel to an alignment direction between the facing poles of opposing magnets. Each coil assembly includes a magnetizer wrapped in a winding. Yokes are extended from two ends of the magnetizer towards opposite directions and a specific distance is between the yokes' centers. Together with the detection switch circuit's switching between positive and negative power supplies, the electric motor effectively reduces input power, and increases output power.

A control apparatus includes: a data acquisition part that acquires correction data indicating a content regarding a correction process which corrects an error of an angle at which a rotation angle sensor that measures a rotation angle of a rotor included in an electric motor is attached; a determination part that determines, based on the correction data, whether or not the correction process has been performed; and a control method determination part that determines, in a case where it is determined that the correction process has not been performed, that an inverter which supplies an AC current to the electric motor is controlled under a pulse-width modulation control.

A control apparatus includes: a data acquisition part that acquires correction data indicating a content regarding a correction process which corrects an error of an angle at which a rotation angle sensor that measures a rotation angle of a rotor included in an electric motor is attached; a determination part that determines, based on the correction data, whether or not the correction process has been performed; and a control method determination part that determines, in a case where it is determined that the correction process has not been performed, that an inverter which supplies an AC current to the electric motor is controlled under a pulse-width modulation control.