4results about How to "Improve magnetic circuit efficiency" patented technology

The application discloses a non-magnetic ring proportional pressure reducing electromagnetic valve for a hydraulic system, a first through hole, a second through hole and a first blind hole are formed in the valve body, a pressure relief hole and a pressure inlet hole are formed in the side wall of the valve body, the pressure relief hole and the pressure inlet hole are communicated with the first through hole, a working hole is radially formed in the side wall of the valve body, the inner end of the working hole is communicated with the first through hole, and the outer end extends to the outer surface of the valve body, a valve core is axially movably installed in the first through hole, and a fifth outer groove and a first annular protrusion are arranged on the outer periphery of the valve core, the first annular protrusion forms an annular gap with the inner wall of the first through hole, a coil assembly is arranged in the yoke, a stop iron is fixedly arranged in the yoke through a mounting plate, and a magnetic circuit optimization structure is arranged on the outer surface of the stop iron. The magnetic circuit optimization and the multiple anti-sticking and friction-reducing designs are integrated, the independent magnetic ring is cancelled, the structure is simplified, the electromagnetic force, the response speed and the service life of the electromagnetic valve are comprehensively improved, the processing difficulty is obviously reduced, and the application range of the electromagnetic valve is widened.

The utility model discloses a rotor structure of outer rotor EC motor, aims at providing a kind of rotor structure of outer rotor EC motor, which can not only improve magnetic tile assembly efficiency, reduce manufacturing cost;And can reduce magnetic loss, improve rotor magnetic circuit efficiency, to improve the rotor structure of a kind of outer rotor EC motor of motor efficiency. It includes rotor shell, the rotor core and several magnetic tiles of being fixed in rotor shell, the inside surface of the rotor core is equipped with several circumferential evenly distributed magnetic tile slots, the magnetic tile is installed in magnetic tile slot one to one, and magnetic tile and rotor core are fixedly connected by bonding.

The invention belongs to the field of motors, and discloses a harmonic blocking type consequent-pole permanent magnet hub motor and a harmonic group differential vibration suppression method. The harmonic wave blocking type consequent pole permanent magnet hub motor provided by the invention adopts a harmonic wave trapping stator and a local magnetic short circuit magnetic barrier rotor structure under consequent poles to actively suppress the vibration source harmonic wave amplitude. The harmonic group differential vibration suppression method provided by the invention comprises the following steps: actively identifying a main vibration source under a current working condition, extracting a characteristic frequency of a superior harmonic group as a core optimization object, obtaining a Pareto leading edge and a solution set thereof under each working condition by adopting a multi-objective optimization method, taking an intersection of parameters of different working conditions, screening out a parameter set with optimal comprehensive performance, and carrying out differential vibration suppression on the Pareto leading edge and the solution set of the Pareto leading edge. The basic harmonic waves of the vibration source are classified into a monitoring layer, and monitoring temporary inactive compensation is carried out, so that differentiated accurate control is realized. According to the method, the limitation that a traditional method is fixed and single is overcome, and active suppression of the dynamic change main vibration source in the full working condition range of the consequent-pole permanent magnet hub motor is achieved.

This application discloses a coil assembly and its winding method, as well as a relay. The coil assembly includes a coil frame, first to third coil lead plates, and enameled wire. The coil frame includes a first winding portion and a second winding portion arranged along a first direction. The enameled wire includes a first winding segment and a second winding segment that are not electrically connected. The first winding segment includes a first winding wound on the first winding portion and a second winding wound on the second winding portion. When the first and second coil lead plates are energized, the first and second windings form a first parallel circuit, and the magnetic fields formed by the first and second windings after being energized are in the same direction. The second winding segment includes a third winding wound on the first winding portion and a fourth winding wound on the second winding portion. When the second and third coil lead plates are energized, the third and fourth windings form a second parallel circuit, and the magnetic fields formed by the third and fourth windings are in the same direction.