A power tool (1), such as an impact wrench (1), includes: a brushless motor (8); a motor housing (7), which houses the brushless motor (8); an anvil (4), which is rotationally driven by the brushless motor (8) and disposed forward of the brushless motor (8); a handle (3), which is disposed downward of the motor housing (7); a battery-mount part (5), which is disposed downward of the handle (3); a battery pack (6), which is mounted on the battery-mount part (5) by being slid relative to the battery-holding housing (5); and a controller (70) for controlling the brushless motor (8). A switch panel (73) having at least one manipulatable button (73c) and at least one display part is provided downward of the handle (3) and is tilted such that the switch panel (73) is higher in the front.

A portable energy-saving and environment-friendly electric vehicle is light in weight, small in volume, convenient in electricity charging, and can be disassembled for portability in a backpack. The backpack is further furnished with a crank-handle generator to enable manpower electricity generation and working out simultaneously. This energy-saving and environment-friendly electric vehicle is mainly comprised of two adjustable skateboards and a support rod for adjusting speed and connecting a battery set. The battery set can be conveniently replaced roadside or at other locations. In a situation of power loss, manpower can be used to charge the battery set. Thus, the situation of power loss fully disabling the electric vehicle can be met. In addition, the battery set associated with the generator is reliable for charging mobile phones and computers.

Disclosed is a device for reducing a user-sensed weight of a wireless vacuum cleaner including a suctioning pipe and a suction motor disposed on a top of the suctioning pipe, the device comprising: a case disposed adjacent to the suction motor and having a space defined therein, and a rotatable assembly received in the space, wherein the rotatable assembly receives therein a motor and a battery, wherein the rotatable assembly is configured to rotate clockwise or counter-clockwise when the motor is activated.

In some embodiments, the present invention may include, for example, systems, devices, and methods for power generation using a permanent magnet and/or an electro magnet installed on a twisted band wheel or wheels and/or installed on stationary discs and plates. Due to magnetic field forces for example between the stationary discs and the twisted band, the twisted band may be driven to move (e.g., rotate), rotation of the twisted band is optionally transferred by an axle to a generator.

In some embodiments, the present invention may include, for example, systems, devices, and methods for power generation using a permanent magnet and/or an electro magnet installed on a twisted band wheel or wheels and/or installed on stationary discs and plates. Due to magnetic field forces for example between the stationary discs and the twisted band, the twisted band may be driven to move (e.g., rotate), rotation of the twisted band is optionally transferred by an axle to a generator.

A motor wiring member configured to supply three-phase alternating current to a motor includes conductive wires, each of which has a connecting portion being provided at one end and being configured to be connected to a coil end of a stator of the motor, a terminal being provided at an other end of each conductive wire and being configured to be connected to an electrode of a terminal block, and a surge suppression section being configured to suppress an overvoltage from being applied to the motor. The surge suppression section includes three series circuits, each of which includes a resistor and a capacitor. One ends of the three series circuits are electrically connected to the conductive wires of respective phases, and other ends of the three series circuits are electrically connected to each other. The surge suppression section is provided along with the conductor wires near the terminal and is located between the terminal and the connecting portion.

An electronically commutated machine, in particular an electronically commutated electric motor is disclosed. To detect an angle of rotation completed by a rotor shaft of the machine or a rotational speed, this rotor shaft is equipped with a signal generator of a sensor device. This latter component has a magnet element, which is fastened on the rotor shaft by way of a holding element. A clamping body is included, which is arranged on the rotor shaft with force fit and onto which the holding element is pressed.

An electric work machine includes a display that properly displays display-data. The electric work machine includes a motor including a stator and a rotor rotatable relative to the stator, an output unit driven by the rotor, a display panel that displays a setting state of the output unit, and a holder holding the display panel. The holder includes metal or synthetic resin.

The present invention provides a motor that comprises: a housing: a stator that is included in the housing and around which a coil is wound; a rotor coupled to the inside of the stator; a shaft coupled to the rotor; and a bus bar-terminal assembly that includes a bus bar that includes a connection terminal connected with the coil and a terminal connected with an external power supply and a body that includes the bus bar therein such that the connection terminal and the terminal protrude to the outside, wherein the bus bar-terminal assembly includes an alignment guide part provided on the outer circumferential surface of the body in the height direction and slide-coupled with the inner circumferential surface of the housing. Therefore, the present invention provides an advantageous effect of increasing the assembly efficiency of the motor and reducing the number of components thereof by configuring the terminal of the bus bar and the terminal-housing assembly as a single component and an advantageous effect of easily securing the alignment position by providing the alignment guide part on the outer circumferential surface of the bus bar-terminal assembly and installing a slot or rib at the inside of the housing to correspond to the alignment guide part.

Low frequency power is transmitted over long distances from a surface power supply to a subsea rotating machine, such as a pump or compressor. The low frequency power is used to rotate a motor at low speed. A liquid filled magnetic step-up gear module might be used to increase the low speed motor shaft to a higher speed output shaft that can be used to operate the rotating machine. The magnetic gear module can be configured as a fixed ratio, and the surface power supply can be configured to adjust the power frequency to change the speed of a single subsea rotating machine. In other embodiments, the magnetic gear module can provide a variable gear ratio. A fixed low frequency might be transmitted from the surface and multiple subsea loads can be operated from the same power source, each having their own variable magnetic gear module.