359results about How to "Easy to change directions" patented technology

A protection configuration for converter means which comprise a plurality of controllable switches, the protection configuration comprising a protection circuit coupled to the alternating voltage side of the converter means, which protection circuit comprises at least one protective switch configured to short-circuit the alternating voltage side of the converter means, wherein the protection configuration, in predetermined failure situations, is configured to close the protective switch and thus to short-circuit the alternating voltage side of the converter means. After the failure situation has cleared up, the protection configuration is configured to short-circuit the alternating voltage side of the converter means by means of the controllable switches to enhance commutation of the protective switch.

An electrical hand-held power tool (2) includes an electric motor (4) with a stator (12), and a device (26) for reversing the rotational direction of the motor (4) and which has a contact carrier (28) fixedly securable on the stator housing with a releasable connection element and having field contacts (32) electrically connectable with the stator winding (14), and fixed contacts (42a, 42b) electrically connected with the field contacts (32), with the reversing device (26) also including a brush carrier (30) provided with carbon guides (48) and switching contacts (52a, 52b) electrically connected with the carbon guides (48) and electrically connectable with the fixed contacts (42a, 42b) of the contact carrier (28), the brush carrier (30) being rotatable relative to the contact carrier (28), and the stator housing (16) having an axial stop for the brush carrier (30).

An armature for a brush commutated electric motor having a distributed coil winding arrangement for reducing brush arcing and electromagnetic interference (EMI). The winding pattern involves segmenting each coil into first and second subcoil portions with differing pluralities of turns. Each subcoil portion is wound around separate pairs of spaced apart slots of a lamination stack. Adjacent coils are wound such that one subcoil portion of each is wound in a common slot to therefore form an overlapping arrangement of each pair of adjacently coils. The winding pattern serves to “shift” the resultant magnetic axes of each coil in such a manner so as to significantly reduce brush arcing and the EMI resulting therefrom. The reduction in EMI is sufficient to eliminate the need for EMI reducing components, such as chokes, which have typically been required to maintain EMI to acceptably low levels. Commutation efficiency is also improved by the distributed winding pattern described above because of the reduction in the unevenness of the magnetic coupling between adjacent coils.

The invention discloses a flying saucer, belonging to an aircraft field; the invention comprises a cabin, an operation and control system, an electric system, a plurality of facilities inside cabin, a fuel system, a starting system and an ignition system; a device for regulating motion direction of the cabin and a device for regulating rotary stability of the cabin are arranged on the cabin; a fuel tank is arranged on the cabin and a fuel pipe is arranged on the fuel tank; a flywheel jet engine is arranged on the cabin and the flywheel jet engine includes a flywheel shaft, a flywheel and a jet device; the jet shaft is connected with the cabin; the flywheel is arranged on the flywheel shaft and a pluratliy of jet devices is arranged on the periphery of the flywheel. The flying saucer can realize vertical takeoff and landing; the invention is provided with the device for regulating the motion direction of the cabin and the device for regulating the rotary stability of the cabin; the flying saucer has simple operation, stable flight and convenient direction-changing; in the flight of the flying saucer, a spiral flow which surrounds the cabin, rotates around the cabin and at the same time spirally propels downwards the cabin is generated, thus greatly accelerating propelling speed of the flow downwards the cabin. The invention has the advantages of high flight speed, flexible direction-changing, high safety, and low fuel cost.