Abstract: The invention provides a unitary cordless dental drive apparatus with a cantilever arm extending outward and positioned to allow a dental nose cone to be connected. An activating switch is located at the free end of the cantilever arm in a position that is convenient for manipulation by a user. In a second embodiment, the switch is in the form of a contactor mounted below the cantilever arm to contact the nose cone when pressed. In a third embodiment, a foot pedal connected to a wireless transmitter is provided to send a signal to a receiver located within the handpiece for activating the handpiece.

Abstract: A battery device includes a main body and a rear cover removably connected to the main body. The main body has a first battery receiving compartment. The rear cover has a second battery receiving compartment. The first battery receiving compartment is configured to receive at least two batteries while the second battery receiving compartment is configured to receive at least one battery. For the battery device, since the back cover is provided with the second battery receiving compartment cooperating with the first battery receiving compartment in the body, the apparatus applying the battery device has at least two supportable power levels. In this way, the battery device can be switched between a low power and a high power, eliminating the need of another battery device.

Abstract: A suction-powered pool cleaning robot that may include a fluid outlet, adapted for connection to a suction hose; a fluid inlet, with a fluid path between the fluid inlet and the fluid outlet; a turbine at least partially disposed within the fluid path so as to extract energy from flow of fluid through the fluid path; an electrical generator for providing power thereto and adapted to be driven by the turbine; a sensor arranged to generate rotation information indicative of a speed of rotation of the turbine; and an electronic controller that is arranged to control an operation of the suction-powered pool cleaning robot in response to at least the rotation information.

Abstract: An x-ray battery adapter system may include an x-ray battery adapter and a geometry adapter. The x-ray battery adapter may include a circuit board, a baseplate, a heat sink, a cover, and a battery input. The baseplate may include a connector that connects to an x-ray generating device. The geometry adapter may include a cable, a battery receptacle configured to house a battery, and a voltage sensor and battery connector block assembly. The x-ray battery adapter may allow a user of an x-ray generating device to utilize different power sources.

Abstract: An electronic control unit switches a switching circuit such that a switched reluctance motor has a first winding pattern, when, with respect to a boundary dividing a driving range of the switched reluctance motor into two ranges, a torque and a rotational speed of the switched reluctance motor that are determined according to an applied voltage are located in the first range on the low load side. The electronic control unit switches the switching circuit such that the switched reluctance motor has a second winding pattern, when the torque and the rotational speed of the switched reluctance motor are located in a second range different from the first range.

Abstract: Two 18V-type rechargeable batteries (31 and 31) are attached in series so as to allow a 36V-type tabletop cutting device (C1) to be utilized. By utilizing the 18V batteries which are highly prevalent for electric tools, it is possible to use the 36V-type tabletop cutting device (C1) as well as to reduce costs for the batteries.

Abstract: The industrial power tool system includes a controller physically disposed in a predefined location within an assembly line work station. The controller has a first radio frequency transceiver that propagates a digital communication signal at a predefined power. A human operable portable power tool has a second radio frequency transceiver configured to communicate with the first transceiver, providing a signal strength datum indicative of the received signal strength. A processor circuit causes the tool to perform a sequence of predefined assembly job steps that are mediated by the processor circuit according to a control loop running on the processor circuit. The processor circuit compares the signal strength datum to a predefined signal strength threshold to determine if the distance between the first and second radio frequency transceivers is less than a predefined distance that defines a home area proximate the controller.

Abstract: An electric motor includes a stator and a rotor. The rotor includes a motor shaft, at least one radial fan and at least one axial fan being non-rotatably situated on the motor shaft for motor cooling. The radial fan is situated in the area of one axial end of the motor shaft and the axial fan is situated in the area of a diametrically opposed axial end of the motor shaft.

Abstract: The antenna coil unit includes a main coil and an auxiliary coil electrically insulated from the main coil, the auxiliary coil being arranged at a position in which an induction current is produced by a magnetic field produced by an electric current flowing through the main coil. The auxiliary coil is configured in a state in which a frequency deviating by a predefined amount in a predefined direction from a target frequency predefined within a harmonic component of the fundamental component of an electromagnetic wave produced by the electric current flowing through the main coil is taken as a resonance frequency. The direction and amount are such that the phase of an alternating-current current flowing through the auxiliary coil is in an opposite-phase state, which is opposite the phase of the harmonic component of an AC current flowing through the main coil.

Abstract: The invention concerns an electric machine with a stator and a rotor, comprising a plate stack with a plurality of superposed plates with windings which can be energized. Disposed at at least one end of the plate stack is an insulating plate. Furthermore, insulating strips are provided on the plate stack, between adjacent windings, which are supported on radially protruding shoulders on the insulating plate.

Abstract: A handheld power tool includes at least one housing unit that has at least one housing element, at least one further housing element, and at least one housing connecting element that connects the housing element and the further housing element to one another. The handheld power tool also includes at least one electrical and/or electronic indication unit that has at least one at least partially circumferentially arranged indication element configured to indicate at least one handheld power tool characteristic variable. The indication element is formed at least partially integrally with the housing connecting element.

Abstract: A bearing and housing support including a bearing outer ring overmolded with a thermoplastic bearing housing. The support arranged to support and engage with an intermediate drive shaft of a vehicle.

Abstract: A motor driven appliance in one aspect of embodiments of the present disclosure comprises a light source, a lighting unit, a motor, an operation unit, an operation detector, a reference signal output unit, a determination unit, and a control unit. The operation detector detects that the operation unit is operated, and outputs an operation detection signal that indicates that the operation unit is operated. The reference signal output unit outputs at least one reference signal that can be used as a reference for determining whether the detection by the operation detector is normal. The determination unit determines whether the operation unit is actually operated based on the operation detection signal and the at least one reference signal. The control unit controls operation of the lighting unit based on the determination made by the determination unit.

Abstract: Provided is a process for cooling a datacenter chamber having racks configured to hold arrays of rack-mounted computing devices, the process including: directing a cooling fluid, at a first temperature and a first pressure from an outer radius of circularly arranged racks through the racks and components within the racks; passing the cooling fluid to an interior chamber of the datacenter chamber at a second temperature and a second pressure; and directing the cooling fluid upward to exit the interior chamber.

Abstract: The disclosure relates to a power tool with a quick-operated locking mechanism. The power tool comprises a housing, an output shaft configured to mount and drive a working head and provided with a carrier extending out of the housing, a fixer configured to fix the working head at the carrier of the output shaft, a locking mechanism configured to lock or release the fixer and a driving mechanism configured to move the locking mechanism between a locking position and a releasing position. While in the locking position, the fixer is clamped fixedly on the output shaft, and while in the releasing position, the fixer is released from the output shaft. The distance between the locking mechanism and the carrier of the output shaft keeps the fixer constant in the locking position to prevent slippage of the fixer and to ensure the working head is firmly fixed.

Abstract: A motor driven appliance in one aspect of embodiments of the present disclosure comprises a light source, a lighting unit, a motor, an operation unit, an operation detector, a reference signal output unit, a determination unit, and a control unit. The operation detector detects that the operation unit is operated, and outputs an operation detection signal that indicates that the operation unit is operated. The reference signal output unit outputs at least one reference signal that can be used as a reference for determining whether the detection by the operation detector is normal. The determination unit determines whether the operation unit is actually operated based on the operation detection signal and the at least one reference signal. The control unit controls operation of the lighting unit based on the determination made by the determination unit.

Abstract: The present invention is a high efficiency permanent magnet machine capable of maintaining high power density. The machine is operable over a wide range of power output. The improved efficiency is due in part to copper wires with a current density lower than traditional designs and larger permanent magnets coupled with a large air gap. In a certain embodiment wide stator teeth are used to provide additional improved efficiency through significantly reducing magnetic saturation resulting in lower current. The machine also has a much smaller torque angle than that in traditional design at rated load and thus has a higher overload handling capability and improved efficiency. In addition, when the machine is used as a motor, an adaptive phase lag compensation scheme helps the sensorless field oriented control (FOC) scheme to perform more accurately.

Abstract: Methods and systems for automatically aligning a power-transmitting inductor with a power-receiving inductor. One embodiment includes a method of applying a direct current pulse to a transmit coil of a power-transmitting inductor to attract the power-receiving inductor into alignment along an alignment axis.

Abstract: A hair dryer includes a fan motor, a heater unit, and a body case arranged to cover the fan motor and the heater unit. The fan motor includes an impeller arranged to rotate about a central axis, and a motor arranged to rotate the impeller. The body case includes an intake case portion including an air inlet, and a discharge case portion including an air outlet. Inside the body case, an inner tubular case portion arranged to extend along an inside surface of the body case is accommodated. A silencing space is defined between the inside surface of the body case and the inner tubular case portion. An opening portion is defined to join the silencing space and an interior space of the body case to each other.

Abstract: An electric power tool including: a housing; a brushless motor accommodated in the housing; a fan attached to a rotation shaft of the brushless motor; a switching element configured to control the brushless motor; and a substrate on which the switching element is mounted, wherein a first through-hole is provided to a switching element arranged portion of the substrate.

Abstract: A method for controlling rotation speed is suitable for an electronic device having a vibrating fan module. The vibrating fan module can generate vibration and output airflow simultaneously. The method for controlling rotation speed includes the following steps. Whether a vibration signal transmitted by the electronic device is received is determined. When the vibration signal is received, a rotation speed of the vibrating fan module is adjusted to a vibration rotation speed. A temperature of the electronic device is sensed. Whether the temperature of the electronic device is greater than or equal to a first preset temperature is determined. When the temperature of the electronic device is greater than or equal to the first preset temperature, the rotation speed of the vibrating fan module is adjusted to a first rotation speed according to the temperature of the electronic device. The first rotation speed is less than the vibration rotation speed.

Abstract: A hand power tool includes a drive unit, an electronic unit, and a cooling device configured to cool at least one of the drive unit and the electronic unit. The hand power tool also includes at least one of an open-loop control unit and a closed-loop control unit configured to control the cooling device.

Abstract: A hair dryer is disclosed. The hair dryer includes a power supply for supplying electric power, a voltage detector for detecting a voltage of the electric power supplied from the power supply, a controller for controlling a driving speed of a motor in accordance with the voltage detected by the voltage detector, and a motor unit comprising first and second triacs to be selectively turned in accordance with the voltage detected by the voltage detector under a control of the controller, a rectifier to be turned on by a selected one of the first and second triacs, and the motor. The motor receives the voltage from the rectifier.

Abstract: Disclosed is a motor, the motor according to an exemplary embodiment of the present disclosure including a rotation shaft having an alignment groove at a distal end of one side from a rotation center, a sensing magnet disposed at the distal end of one side of the rotation shaft by being mounted on the alignment groove of the rotation shaft, a rotor including a magnet coupled to a periphery of the rotation shaft, and a stator including a core wrapping an ambient of the rotor and wound with a coil.

Abstract: Power tool housing shells that matably attach to each other and define an interior cavity that is sized and configured to encase at least a motor associated with a power train for a power tool. Each housing shell is a substantially rigid molded shell body. Each housing shell inner surface includes at least one overmold motor mount member of a resilient material directly, integrally attached to an inner surface of the respective housing shell.

Abstract: A hand power tool, in particular an angle grinder, includes a drive unit and an electronic unit. The hand power tool further includes an after-run cooling unit configured, at least partially, to cool the drive unit and/or the electronic unit substantially after an operating state of at least the drive unit.

Abstract: In a hand-held power tool having a housing and a tool holder, which is disposed on a drive shaft that is rotationally mounted in at least one first and one second ball bearing, the first ball bearing having a first inner ring and the second ball bearing having a second inner ring, a spring element is disposed between the first inner ring and the second inner ring in order to prestress the first ball bearing with respect to the second ball bearing.

Abstract: A power tool includes a motor, a gear mechanism that changes the speed of an output of the motor, a drive circuit including a switching element that controls power supplied to the motor, a housing that accommodates the motor, a fixture that fixes the motor to the housing, and a temperature sensor that measures a temperature of the switching element. The drive circuit stops supplying power to the motor when the temperature measured by the temperature sensor reaches a predetermined temperature. The fixture functions to radiate heat from the switching element.

Abstract: In a brushless motor, a rotor core is fixed to a shaft. Through holes are formed in the rotor core, and permanent magnets are inserted to be fixed in place in the through holes. A stator core is fixed to an outer circumferential surface of the rotor core such that the stator core faces the outer circumferential surface of the rotor core. Stator coils are provided on the stator core via insulators so as to configure magnetic flux generating portions. A cooling fan is provided in front of a stator which is configured by the stator core and the stator coils. Axial position of blades of the fan and axial positions of the rotor core and the permanent magnets partially overlap each other in their positions.

Abstract: A disposable pump element has at least one first part, in which channel structures are recessed in the surface, and a second part sealingly covering the first part. A larger portion of the first part is applied to a rigid carrier structure. The first part has at least one flexible region, and at the flexible region thereof, the first part is not applied to the rigid carrier structure. A system for pumping, and a method for pumping a liquid, both employ the disposable pump element.

Abstract: An energy conversion system includes rotor, stator and shell components configurations for increasing power efficiency and improving replacement and repair efficiency. The system harvests environmental energy for lower power generation and accounts for non-mechanical sources of rotational resistance within the generator.

Abstract: The method includes measuring an operating parameter comprising at least one of a phasor current and phasor voltage of an electrical machine. The method further includes determining a diagnostic parameter indicative of a fault of the electrical machine based on the measured operating parameter. The method also includes estimating end of life of the electrical machine based on the diagnostic parameter using an error minimization method.

Abstract: A handheld, electromechanical device useful in mammalian body-care includes a one-piece housing, a unitary insert, and a removable cover. The one-piece housing has a single opening defined by a rim. The rim circumscribes a rim area, and the one-piece housing has a projected area that is substantially larger than the rim area. The unitary insert is dimensioned to be insertable through the opening defined by the rim, and it has a frame having disposed thereon electromechanical elements interconnected in an electrical circuit. The cover is arranged and configured to close the opening of the one-piece housing.

Abstract: An electric tool including: a motor having a stator coil; and a circuit board, wherein the stator coil includes a coil main body and an extending part extending from the coil main body and electrically connected to the circuit board, and wherein the extending part is slacked.

Abstract: A power tool includes a casing with an inlet and an outlet extending in a radial direction of the casing, a motor installed within the casing between the inlet and the outlet. The motor includes a stator and a rotor with a shaft, an air passage being formed between a radially outer surface of the stator and an inner surface of the casing. The air passage extends in the axial direction of the casing. A heat dissipation device is arranged on the radially outer surface of the stator for absorbing heat from the stator, and is disposed in the air passage. A fan is fixed to the shaft of the rotor. Air flow generated by the fan enters the casing via the inlet and exits the casing via the outlet after passing through the air passage and the heat dissipation device.

Abstract: An electric power tool of the present invention includes a motor used as a drive source housed in a dual-separated type housing and includes a bearing support member that covers the outer circumferential surface of a bearing of the motor and supports the bearing from outside in the radial direction, and is configured such that the bearing and one end of the bearing support member in the axial direction are inserted in a tool component disposed coaxially, and a protruding portion that is the other end of the bearing support member and axially protrudes from the tool component is supported by receiving portions of a pair of housing parts.

Abstract: A support device and method for fixing a bearing on a bearing shield of a housing of an electric machine. Rotatably mounted in the support device is a rotor with a shaft. The support device is substantially flat and comprises a plurality of fastening openings that are grouped about a central opening. The support device comprises at least one design break point that acts to provide a local limit to the excess stress in the material of the support device.

Abstract: Provided is a combined explosion-proof electromotor, which includes a body in which an interior space is formed and whose one end is open in an axial direction, a terminal box whose one end is open in the axial direction so as to face the open end of the body and in which a space is formed to hold terminal cables extending from the outside, and a middle plate that is disposed between the opposing ends of the body and the terminal box which are connected by separate fastening means and that includes terminal insertion holes through which ends of the terminal cables are inserted into the body.

Abstract: According to an aspect of the present invention, there is provided a power tool including: a brushless motor; switching elements that drive the brushless motor; a circuit board on which the switching elements are mounted; a transmission portion that transmits a driving force of the brushless motor; and a housing that houses the brushless motor, the switching elements, the circuit board and the transmission portion therein, wherein the switching elements include semiconductor elements each having terminals on a bottom surface thereof, and wherein the switching elements are surface mounted on the circuit board.

Abstract: A belt battery charger includes a belt having a first end, a second end and an elongated central portion extending between the first and second ends. A plurality of electrically connected rechargeable batteries are carried by the central portion of the belt. A belt buckle located at the first end of the belt includes a frame that is secured to the central portion of the belt. The buckle further includes a prong in the form of an electrical connector electrically connected to the batteries and pivotally secured to the frame. The second end of the belt includes a number of spaced apart eyelets passing therethrough. The prong is shaped so as to be able to enter one of the eyelets to secure the second end of the belt to the buckle in the conventional manner. A second electrical connector is located adjacent the second end of the belt and is also connected to the batteries. One of said connectors is adapted to be connected to a cell phone for charging the same.

Abstract: A handheld grinder comprising a housing; a grinding disk; a motor; an output shaft connected to the grinding disk and the motor to impart rotary motion thereto; and a circuit board residing in the housing and having thereon a rectifier that receives an alternating current and converts the alternating current to a direct current, a switching arrangement having a plurality of motor switches connected electrically between the rectifier and the motor and operates to deliver the direct current from the rectifier to the motor, a capacitor connected electrically between the rectifier and the switching arrangement, wherein the capacitor is coupled in parallel across the rectifier, a driver circuit interfaced with the motor switches and operable to control switching operation of the motor switches, and a power switch connected electrically between the rectifier and the driver circuit and operable to selectively energize the driver circuit and power on the grinder disk.

Abstract: An electric motor is provided including a stator and an armature rotatably received within the stator, the armature having an armature shaft on which a commutator is mounted. The motor also includes a brush assembly having a brush card mount disposed around the commutator, a brush holder mounted on a surface of the brush card mount, and a brush disposed within the brush holder in sliding contact with the commutator to supply electric current to the commutator. A back surface of the brush includes at least one curved surface and a groove. A torsion spring is secured to the brush card mount adjacent the brush holder, the spring having a leg arranged to engage the groove of the back surface of the brush.

Abstract: Disclosed herein is a charging apparatus using a pad type electrode contact point, the charging apparatus including: a charging plate having a plate shape; and an attaching plate installed on a portable terminal to provide the power to a charging circuit of the portable terminal.

Abstract: A power tool (1; 90) includes a motor (17) having a stator (18) and a rotor (19). The stator (18) includes front and rear insulators (21, 22) respectively disposed forward and rearward of a stator core (20) in an axial direction thereof. At least six coils (23) are respectively wound on the stator (18) such that the coils (23) are wound through the front and rear insulators (21, 22). Winding wires (23a) respectively electrically connect circumferentially-adjacent pairs of the coils (23). A short circuiting device (25) short circuits respective pairs of windings (23a) that are located diagonally or diametrically across from one another.

Abstract: Hand-held machine tool having an outer housing extending substantially along a longitudinal axis, with an electric drive unit accommodated in this outer housing, and with a tool arrangement which is disposed at a first end of the electric drive unit. The outer housing of the machine tool has a defined inner contour and the electric drive unit and the tool arrangement have a defined outer contour. The outer contour and the inner contour of the outer housing are at a predetermined minimum spacing from each other. At least one inlet opening for cooling air is disposed in an end region of the outer housing. The electric drive unit drives a fan arrangement which draws in through the at least one inlet opening cooling air which flows substantially parallel to the rotational axis of the electric drive unit through the machine tool and flows out of the outer housing to the outside at the outer contour of the machine tool.

Abstract: A handheld surgical device includes a multi-position throttle, rotatably attached to the body of the device, to allow for ambidextrous positioning of a motor speed control lever. The motor speed control lever may interact with a speed control sensor in the body of the device capable of detecting the actuation level of the motor speed control lever in any one of two or more positions.

Abstract: A power tool is provided including a housing and an electric motor disposed in the housing. The motor includes a stator having a lamination stack having separately-formed pole pieces and field coils disposed on the pole pieces, and an armature disposed in the stator. An end ring is disposed at an end of the lamination stack, the end ring including at least two ring pieces mated together around a portion of the field coils extending beyond pole tips of the pole pieces.

Abstract: An electric tool may include a motor housing and a motor disposed within the motor housing. The motor has a stator fixed in position relative to the motor housing and a rotor rotatable about a motor axis. Cooling air can flow within the motor housing across the motor in a direction substantially parallel to the motor axis. A baffle may be disposed within the motor housing for regulating the flow of cooling air across the motor. At least a part of the baffle may be positioned within a range of a length of the stator with respect to the axial direction of the motor axis.

Abstract: An electric power tool for processing a substrate is disclosed. The electric power tool includes a tool which is designed to be rotatable around a rotational axis, a motor assembly having at least one motor which rotates the tool around the rotational axis, a motor housing having at least one receiving area for the at least one motor, a cooling element for cooling the at least one motor, and an electronic assembly having at least one electronic component to be cooled. The cooling of the at least one electronic component to be cooled is carried out via the motor housing.

Abstract: An electric motor for a power tool includes a stator and an armature disposed in the stator. The armature includes a lamination stack having slots therein; an armature shaft extending coaxially through the lamination stack; a plurality of magnet wires wound in the slots of the lamination stack; a commutator disposed on the armature shaft to which ends of the magnet wires are electrically coupled; and thermally conductive plastic at least partially encasing the magnet wires, the thermally conductive plastic having a base polymer that is a blend of at least two polymers.