The present invention relates to an arrangement for cooling of an electrical machine. The electrical machine comprises a rotor rotatably arranged around a rotation axis, a stator including a stator winding arranged radially outside of the rotor, a housing enclosing the rotor and the stator, at least one drain hole configured to drain a cooling fluid from the housing, at least one spraying device configured to spray cooling fluid on the stator winding and a pump configured to pump cooling fluid to the spraying device. The arrangement comprises a control unit, which is configured, when the electrical machine is in operation, to receive information of the temperature in at least one position of the stator winding and to control the pump such that it pumps a flow rate of the cooling fluid to the spraying device, which is related to the estimated temperature of the stator winding.

An annular sensor magnet to be fixed to a motor shaft by a press-fit includes an annular portion having magnetic poles alternately formed in an outer peripheral portion. The annular sensor magnet also includes a fixing portion extending from an inner peripheral portion of the annular portion toward a center to support and fix the motor shaft having been press-fit, and a stress reducing portion for reducing stress caused in a contact portion of the fixing portion that contacts the motor shaft when the motor shaft is press-fit onto the fixing portion. The sensor magnet includes a bonded magnet in which a magnetic material is dispersed in a plastic material.

A system and a method for a torque measurement system for a vehicle having a rotatable member connecting an engine to a torque converter and rotatable about a rotating axis, the torque measurement system including a strain measuring module arranged to measure the strain on the rotatable member; a control module arranged to process the data associated with the strain measurement; and an energy generating module arranged to generate electricity through the movement of the rotatable member, thereby powering the torque measurement system.

A system and a method for a torque measurement system for a vehicle having a rotatable member connecting an engine to a torque converter and rotatable about a rotating axis, the torque measurement system including a strain measuring module arranged to measure the strain on the rotatable member; a control module arranged to process the data associated with the strain measurement; and an energy generating module arranged to generate electricity through the movement of the rotatable member, thereby powering the torque measurement system.

The present disclosure provides an actuator and related method of use that can change and control positions of chokes, valves, and other rotational equipment in response to changes in either pressure, torque, or a combination thereof. The actuator with associated integrated components including a servo motor, motor controller, torque sensor assembly, encoder, holding brake, and onboard controls can be encased in a sealed explosion proof rated enclosure for deployment on a drilling rig or other explosive environments with a small footprint suitable for space limited locations. Pressure applied over a known area, such as a choke plug, is converted to torque and can be repeated regardless of flow rate, temperature, fluid type, or density. The torque sensing ability advantageously can quickly respond to fluid changes and make large steps to different set points with accuracy. The onboard controls can control the actuator autonomously without constant communication with a remote controller.

A screwing machine includes a motor, an output shaft, a twist portion, a plate portion, a strain gauge, an amplification circuit. The output shaft is driven by the motor. To the output shaft, a bit is attachable. The twist portion is hollow. To the twist portion, torque applied to the output shaft is transmitted through a transmission element. The output shaft is configured to be indirectly twisted by the torque applied to the output shaft. The plate portion is integrally formed with the twist portion. The strain gauge is disposed on the twist portion. The amplification circuit is disposed on the plate portion. To the amplification circuit, a signal from the strain gauge is input.

A screwing machine includes a motor, an output shaft, a twist portion, a plate portion, a strain gauge, an amplification circuit. The output shaft is driven by the motor. To the output shaft, a bit is attachable. The twist portion is hollow. To the twist portion, torque applied to the output shaft is transmitted through a transmission element. The output shaft is configured to be indirectly twisted by the torque applied to the output shaft. The plate portion is integrally formed with the twist portion. The strain gauge is disposed on the twist portion. The amplification circuit is disposed on the plate portion. To the amplification circuit, a signal from the strain gauge is input.

A drive motor includes a torque sensor on an outer circumference of a shaft. The drive motor includes a rotor, a rotor shaft arranged inside the rotor, and an output shaft that is joined to the rotor shaft by a joint having a loose element. In the drive motor, the output shaft outputs rotational force of the rotor shaft to the output side. The torque sensor is arranged on an upstream side of the joint in a range not overlapping with the joint.

A drive motor includes a torque sensor on an outer circumference of a shaft. The drive motor includes a rotor, a rotor shaft arranged inside the rotor, and an output shaft that is joined to the rotor shaft by a joint having a loose element. In the drive motor, the output shaft outputs rotational force of the rotor shaft to the output side. The torque sensor is arranged on an upstream side of the joint in a range not overlapping with the joint.

An input cam having a recessed track for establishing a desired dwell time for a plurality of rotatable permanent magnets and an output cam having a recessed track for maximizing the harnessing of linear motion energy and to apply the harnessed energy to a rotary output are provided to improve the efficiency of a magnetic transmission.