Abstract: A frame included in an electric motor has an inflow hole that allows outside air to flow in an interior of the electric motor and an outflow hole that allows the outside air having flowed in to flow out of the electric motor. The electric motor includes a first partition member forming a first ventilation path between the first partition member and the frame, and a second partition member forming a second ventilation path between the second partition member and the frame. In addition, the stator has a third ventilation path penetrating through the stator from one end to another end of the stator in a direction of a rotational axis and configured to communicate with the first ventilation path and the second ventilation path.

Abstract: The present document relates to an electric drive unit, comprising: a stator configured to produce a stator magnetic field, at least a first rotor including first rotor windings, the first rotor windings for instance including multi-phase windings, and at least a first inverter electrically connected with the first rotor windings and configured to produce an electric current in the first rotor windings for producing a first rotor magnetic field. The stator magnetic field is configured to interact with the first rotor magnetic field to exert a torque on the first rotor. The present document further relates to a method of operating the electric drive unit.

Abstract: A generator cooling structure of an engine including a crankshaft and a generator arranged on one end side of the crankshaft includes a crankcase that houses the crankshaft and a generator cover that is coupled to the crankcase in order to house the generator. The generator has a rotor fixed to the crankshaft and a stator fixed in position with respect to the generator cover. A cooling medium supply passage, which is arranged in the direction of the one end side of the crankshaft in the stator in order to supply the cooling medium to the stator, is provided.

Abstract: A power tool system includes a power tool having a tool housing. The tool housing includes a battery pack receptacle having a set of tool terminals. A brushless motor includes an output shaft operably coupled to drive a tool element, a stator having an outer diameter of approximately 60 mm to approximately 80 mm, and a stack length of approximately 75% to approximately 125% of the outer diameter of the stator. A controller is operably connected to the set of tool terminals and to the brushless motor to control power delivery to the brushless motor. A battery pack includes a battery pack housing connectable to the battery pack receptacle on the tool housing and a set of battery cells. The set of battery cells includes at least 15 battery cells each having a nominal voltage of approximately 3.6V and an impedance of approximately ?13 m?. A set of battery pack terminals is connectable to the set of tool terminals.

Abstract: A dryer includes a drum including a drum body, a front cover with a drum inlet, and a rear cover with an air inlet, a fixing panel that has a first cooling hole and a second cooling hole, a motor configured to rotate the drum, where the fixing panel further defines supply holes arranged along a circumferential surface of the motor and configured to guide air to the air inlet, a supply duct fixed to the fixing panel and configured to guide air to the supply holes, where the supply duct defines an accommodating space that accommodates the motor, and a duct cover that connects together the first cooling hole, the accommodating space, and the second cooling hole and that is configured to circulate air through the first cooling hole, the accommodating space, and the second cooling hole to thereby cool the motor.

Abstract: A rotor (1) for an electric machine (2) includes at least one sensor element (3) configured for detecting condition variables of the rotor (1), a signal processing unit (4) connected to the at least one sensor element (3) and configured for generating measured data from the detected condition variables of the rotor (1) and transmitting the measured data to a control device (5), and a nanogenerator (6) configured for generating electrical energy from at least one surroundings variable and supplying the at least one sensor element (3) and the signal processing unit (4) with electrical energy.

Abstract: There is provided a current transferring device for an electric machine comprising a rotary bearing member fixed in a rotor shaft and rotating with it and a non-rotary component. The rotary bearing member includes a first compartment filled with a conducting fluid and having a first opening and a rotor positive connector that is in electrical contact with the conducting fluid therein and electrically connected to a rotor positive pole, and a second compartment filled with a conducting fluid and electrically insulated from the first compartment and having a second opening and a rotor negative connector that is in electrical contact with the conducting fluid therein and electrically connected to a rotor negative pole. The non-rotary component closes the first and second openings.

Abstract: A rotor for an electric machine, comprising a rotor shaft and a laminated core arranged on it, comprising multiple metal plates arranged in axial succession and lying against each other, as well as at least one coolant duct running through the laminated core, wherein the laminated core is axially clamped by at least one clamping means, wherein the clamping means shoved onto the rotor shaft comprises at least one axially braced spring element and at least one tolerance compensation disk.

Abstract: The present disclosure provides a base assembly of voice coil motor and a voice coil motor. The base assembly includes a base body having a first elastic piece connecting area, a lower elastic piece disposed on the first elastic piece connecting area, and a first terminal disposed in the base body. The first terminal has: a first conductive part disposed in the base body; a first terminal connecting part disposed on one side of the first conductive part and extending toward a direction away from the first conductive part, wherein a part of the first terminal connecting part protrudes from the first elastic piece connecting area and is connected with the lower elastic piece; and an engaging part disposed on one side of the first terminal connecting part and extending toward a direction away from the first terminal connecting part.

Abstract: A power generation system which is mounted on at least one triangular shaped horizontal base on which is placed a cylindrical platform at the center, which is called a primary rotor, and a set of three cylindrical platforms, which are called secondary rotors, which surround the first rotor. The primary rotor and secondary rotors have a specific set of neodymium magnets and are fixed on vertical axis bearings mounted on the said horizontal base.

Abstract: A servo motor and a robot. The servo motor includes: a housing, a rotor, a stator, a Hall magnet, and one printed circuit board. The rotor is arranged in the housing and has a rotor support and a rotor shaft; the stator is arranged in the housing; the Hall magnet is arranged on the rotor; the printed circuit board is arranged in the housing and provided with a position sensor facing the Hall magnet.

Abstract: An end winding support of a rotor of an electric machine is provided. The end winding support includes a first part and a second part. The first part includes an elongate body about which a conductive winding is wound. The elongate body has a surface defining a first groove. The second part is attached to the first part. The second part includes a body which extends outwardly from the elongate body and which has a surface defining a second groove corresponding to the first groove.

Abstract: An assembly can include a rotor that defines a rotor axis and that includes a number of permanent magnets; a stator that defines a stator axis, coaxially aligned with the rotor axis, and that includes a number of electropermanent magnets; and a controller that controls polarity of the electropermanent magnets to rotate the rotor about the rotor axis.

Abstract: An electric motor assembly includes a housing, an impeller disposed inside the housing, a stator disposed at one side of the impeller in an axial direction of the impeller, the stator comprising a plurality of coil parts, a rotor that includes a rotation shaft connected to the impeller and that is configured to rotate relative to the stator, a bracket that is coupled to the housing and supports the rotation shaft, and a connection ring that electrically connects together end portions of the plurality of coil parts.

Abstract: A motor drive system includes a motor that drives a vehicle so as to travel, a motor control device that includes an inverter and a control device that controls the inverter, and which controls the motor, and a communication electronic control unit connected to the control device, wherein the communication electronic control unit transmits information regarding a drive system of the motor transmitted from the control device to an exterior of the vehicle.

Abstract: A brushless direct-current (BLDC) motor includes a stator assembly and a rotor assembly including a rotor supporting permanent magnets rotatable relative to the stator assembly. The stator assembly includes a stator comprising a stator core and stator teeth radially extending from the stator core and defining slots therebetween. A first set of stator windings is wound on the stator teeth, and a second set of stator windings is also wound on the stator teeth such that, on each stator tooth, the first and second windings are provided in an electrically parallel configuration.

Abstract: Power tools described herein include a housing, a brushless direct current (DC) motor, a non-conductive terminal mount, and a plurality of terminals. The housing has a motor housing portion, a handle portion, and a battery pack interface. The brushless DC motor is located within the motor housing portion and has a rotor and a stator. The non-conductive terminal mount is located on an outer peripheral surface of the stator and includes an angled surface. The angled surface is not substantially parallel to a longitudinal axis of the motor. The plurality of terminals is mounted on the angled surface of the terminal mount. Each of the terminals is angled in a first direction such that the terminals are not substantially parallel to the longitudinal axis of the motor.

Abstract: An electric machine can include a stator core having a plurality of core teeth that define a plurality of core slots in a surface thereof. A winding can be housed at least partially in the core slots. The winding can include a tube defining a channel through at least a portion thereof and one or more wires disposed along a surface of the tube that is opposite the channel. A cooling system can be operably coupled with the channel and configured to move a cooling fluid through the channel.

Abstract: A fractional concentrated stator for use in electric aircraft motor includes an inner and outer cylindrical surface about an axis of rotation comprising different radii. The stator includes a plurality of teeth disposed on the inner cylindrical surface and extending radially inward, the cross-sectional area of each tooth increasing as it extends from the inner cylindrical surface. The stator includes a plurality of modular winding sets, each comprising at least a segment of electrically conductive material wound upon at least a tooth, an inverter providing electrical power to a configurable portion of the stator, and rotor shaft at the axis of rotation disposed coaxially within the stator. The rotor shaft further includes a cylindrical surface facing the inner cylindrical surface of the stator, a plurality of magnets coupled to rotor shaft and coupled to a propulsor and an air gap between the rotor and stator.

Abstract: A rotary electronic component capable of reducing an abrasion and a metal fatigue of a slider and extending a rotation life time compared to the conventional technology. A rotary electronic component is provided with a buffer member between a sliding portion of a slider and a rotor. Thus, the sliding portion is energized toward the annular electrode with a proper elastic force and the sliding portion is held. Because of this, vibration of the sliding portion is suppressed and metal fatigue of the slider can be reduced. Furthermore, since the lubricant is impregnated into the buffer member and a part of the buffer member is in contact with the annular electrode, the lubricant can be applied on the annular electrode. Consequently, the sliding portion slides smoothly and the abrasion of the contact portion can be further reduced. In addition, since the buffer member functions to wipe the surface of the annular electrode, foreign substances such as dust on the annular electrode are collected.