8 results about "High power density" patented technology

Apparatus and methods for providing and controlling a permanent magnet electro-mechanical device that functions as a motor or generator are disclosed. The electro-mechanical device uses control coils to steer magnetic flux of permanent magnets placed between stator segments. The control coils can be wound around the bridge of a stator segment, the poles of a stator segment or both. The electro-mechanical device can be single phase or multi-phase and can include controllers, sensors, a thermal/electrical insulating structure, or a reluctance gap. The stator poles are grouped and designed with an angular spacing that is based on the number of permanent magnets. The electro-mechanical device has a higher power density than conventional motors and generators and operates more efficiently, while operating at cooler temperatures.

The invention relates to a capacitor of a lithium ion battery. The capacitor comprises a capacitor shell, an organic electrolyte arranged in the capacitor shell, a winding core formed by isolating a positive plate from a negative plate through an ion permeability microporous membrane and winding, wherein the positive plate and the negative plate are respectively connected with a positive lug and a negative lug and are led out by the positive lug and the negative lug to a positive end and a negative end of the capacitor shell. A negative active material comprises a material A and a material B, wherein the material A comprises at least one of hard carbon and soft carbon, the material B comprises at least one of natural graphite, modified graphite and synthetic graphite, the material A accounts for 50.0%-95.0% of the capacity percentage of the negative active material, and the material B accounts for 5.0%-50.0% of the capacity percentage of the negative active material. The capacitor has the high-energy density characteristic of the lithium ion battery and the high-power density characteristic of a double electric layer capacitor.

The invention discloses a disc type double-stator hybrid excitation motor. According to the hybrid excitation motor designed in the invention, based on the principle of magnetic field modulation, the combination of a disc type permanent magnet motor and an electric excitation system is realized. The hybrid excitation motor has the characteristics of high power density, high moment density, a short axial size and a compact structure and also has the advantages of flexible adjustment of an excitation magnetic field and a wide speed regulation range, and thus the hybrid excitation motor can be applied to the field of electric vehicle hubs. The motor comprises two stators and one disc type rotor. An excitation winding and an armature winding are respectively arranged at the stators at two sides, and a permanent magnet pole and a core pole are distributed on the rotor. By using the magnetic field modulation technology, the permanent magnet on the rotor and the excitation winding on an inner stator generate a magnetic field same with an armature winding pole pair number at an external air gap, and a permanent magnet pole and an iron pole are uniformly distributed on the rotor. By using the magnetic field modulation technology, the permanent magnet on the rotor and the excitation winding on the inner stator generates a magnetic field same with the armature winding pole pair number at the external air gap, and thus the electromechanical energy conversion is realized. The back EMF waveform is improved through the design of a multi-phase structure and a three-layer fractional-slot integrated winding, and the reliability and fault tolerance of the motor are improved at the same time.

The invention relates to a piston steam engine having flash vapourisation. Said inventive piston steam engine has a simple construction, a very good exergetic degree of efficiency and can be operated with various working mediums and at different temperatures. Also, the inventive piston steam machine can reach very high power density.

The invention discloses an all-solid-state laser capable of obtaining single-frequency output at a wavelength of 558nm. The all-solid-state laser comprises a pumping source system and a Z type resonator device, wherein the pumping source system comprises a laser diode LD, an optical fiber and a focusing coupling lens system which are arranged on an optical path in sequence; the Z type resonator device comprises a rear mirror, a concave folding mirror, a yellow light output mirror and a total reflective mirror which are arranged in a Z type cavity in sequence; wave plates and a laser gain medium are arranged between the rear mirror and the concave folding mirror; a birefringent filter is arranged between the concave folding mirror and the yellow light output mirror; and a frequency doubling crystal is arranged between the yellow light output mirror and the total reflective mirror. According to the all-solid-state laser, the high power density of fundamental light in the cavity is fully utilized and the frequency doubling efficiency is improved by adopting the Z type cavity, so that the yellow light laser output at single longitudinal mode, low noise, high power and high energy is realized, and the defects of the laser in the prior art are successfully solved.

The invention provides a preparation method of a positive plate with pre-embedded lithium graphene. The preparation method includes the steps: (1) adding graphite oxide and polyacrylonitrile into a ball mill to perform ball-milling, and then adding ball-milled mixture into mixed solution of ethyl alcohol and water to perform ultrasonic dispersion and form suspension liquid; (2) soaking foaming nickel in the suspension liquid, evaporating solvents, then placing the foaming nickel into a muffle furnace protected by mixed gas of hydrogen and nitrogen to react, and naturally cooling the foaming nickel after complete reaction; (3) steeping a product into hydrochloric acid to completely react to obtain foaming graphene; (4) adding lithium carbonate into water to form solution by mixing, titrating and coating the solution with the lithium carbonate onto the foaming graphene, drying the foaming graphene, placing the dried foaming graphene into the muffle furnace to anneal, cooling the foaming graphene placed into the muffle furnace, and then rolling the cooled foaming graphene to obtain an electrode plate. By the preparation method, high-energy density and high-power density are realized.

The invention discloses an unconstrained hydraulic amplification electrostatic self-driven rolling type robot which comprises N outer flexible electrode layers, an inner flexible electrode layer, an outer elastic layer, an inner elastic layer, an inner liquid dielectric layer and a rigid inner frame, the inner flexible electrode layer is arranged outside the rigid inner frame, and the inner elastic layer is arranged outside the inner flexible electrode layer. The inner liquid dielectric layer is arranged outside the inner elastic layer, the outer elastic layer is arranged outside the inner liquid dielectric layer, and the N outer flexible electrode layers are uniformly attached to the outer surface of the outer elastic layer at a gap distance l. An internal interface is led out from the inner flexible electrode layer, an external interface is led out from each external flexible electrode layer, the N external interfaces are connected in parallel and then connected with the internal interface in series, and the internal interface and the N external interfaces are connected with a circuit unit. Compared with the prior art, the unconstrained hydraulic amplification electrostatic self-driven rolling type robot has the advantages of low manufacturing cost, simplicity in manufacturing and capability of realizing higher power density and higher response speed.