35results about How to "High electromechanical energy conversion efficiency" patented technology

The invention discloses a five degrees-of-freedom conical magnetic levitation switch reluctance motor and a control method. The motor consists of a three-phase 12 / 8-pole switch reluctance motor and two conical magnetic bearings; the bias winding of one conical magnetic bearing and two windings in the A phase horizontal direction of the switch reluctance motor are connected in series while the biaswinding of the other conical magnetic bearing and the two windings in the A phase vertical direction are connected in series to form two channel A phase composite windings; a constant switch-on strategy is adopted to generate bias magnetic flux of the two magnetic bearings and to generate torque in the reluctance motor; the B and C phase winding structures in the switch reluctance motor in the motor are the same as that of the conventional switch reluctance motor, so that alternate excitation switch-on is performed to generate torque to realize rotary operation; by only controlling the current of the A phase two sets of windings and the current of four radial levitation windings, five suspension force can be controlled to realize the five degrees-of-freedom levitation; and the motor is high in system integration degree, high in magnetic utilization rate, simple in control and convenient to implement.

The invention discloses a cage-shaped brushless double-fed alternating-current motor with a heterogeneous rotor structure. The cage-shaped brushless double-fed alternating-current motor is characterized in that a rotor comprises heterogeneous end covers, a rotor iron core and a rotary shaft, wherein all punching pieces of the rotor iron core are provided with a plurality of groove holes, and copper strips are embedded into the groove holes in an insulated manner. In the same quadrant, from the symmetrical axis to the outer edge, the groove holes are distributed in a mode of in-sequence and symmetric increase of the diameter. The heterogeneous end covers are formed by embedding of conductive parts and insulating parts, the positions and the shapes of the two end parts of the conductive parts correspond to the groove holes, and the end parts with the equal diameter in the same quadrant are connected in sequence by a two-two manner. The cage-shaped brushless double-fed alternating-current motor disclosed by the invention has the beneficial effects that the form of combining the heterogeneous end covers and the copper strips of the rotor is adopted, the structure is compact, the connecting strength is enhanced, the problem of looseness and throwing out of connecting guide lines at the end parts of the short-circuit cage-shaped rotor when in high-speed rotation is solved, so that the reliability of the motor is improved; and since the embedded copper strips with different sectional surfaces are adopted, the basic equalization of the currents among different short-circuit windings is ensured, so that the electromagnetic torque provided by all guiding strips is more uniform, and the electromechanical energy conversion efficiency is higher.

The invention discloses a two-phase multipolar switch reluctance motor which comprises a shell, a left end cap, a right end cap, a stator, a rotor, rotor spoke iron, a rotary shaft, a motor controller, two position sensors and two oscillators. Stator magnetic poles and rotor magnetic poles are in a double convex pole structure identical in number of poles, magnet exciting coils of two adjacent magnetic poles are sequentially connected in a one-positive one-negative manner, two adjacent stator magnetic poles form equant double magnet dividing loops, the stator electric poles and the rotor electric poles are distributed into two sections along the direction of the rotary shaft at same intervals, magnet exciting coils of two sections of the stator magnetic poles are connected into two phases respectively, two sections of the rotor magnetic poles are mutually staggered with one magnetic pole angle, and the two position sensors are connected with the motor controller which is connected with the two oscillators through an electronic switch. The two-phase multipolar switch reluctance motor has the advantages of self-starting capability, narrow dead torque area, namely, zero torque area, lowered vacancy rate of a control circuit and a motor body structure, improved performance, simple structure and good cooling performance of a self-ventilation and cooling system.

A modular flywheel pulse generator system belongs to the technical field of motors and power electronics. The present invention solves the problems of low power density, low energy density, and large volume and weight caused by long shafting and low speed of the existing flywheel pulse generator set; And low reliability, high cost problems. The invention includes an input inverter, an axial magnetic field structure multi-air-gap embedded permanent magnet rotor synchronous motor, an output rectifier and an excitation current adjustment unit; the state of the motor: the axial magnetic field structure multi-air-gap embedded permanent magnet rotor synchronous motor passes the input The inverter absorbs energy from the power grid, converts electrical energy into mechanical energy and stores it; generator status: the axial magnetic field structure multi-air gap embedded permanent magnet rotor synchronous motor converts mechanical energy into electrical energy, and supplies power to the load through the output rectifier; excitation current The regulating unit is used to control the air-gap magnetic field of the synchronous motor in the generator state, so as to ensure that the output voltage of the synchronous motor remains constant under the state of load and speed changes.

The invention relates to a synchronous motor, which is characterized in that a set of 2 p pole three-phase armature windings and a set of 2 q Pole single-phase excitation winding, which supplies power to the excitation winding to realize self-excitation of the stator. The rotor is composed of cage rotor modules along the circumferential direction to form a rotor with salient poles. Each cage rotor module is made of positioning slots and non-magnetic materials. The sleeves are connected; the cage rotor module has multiple radial trapezoidal slots, and each trapezoidal slot has several different stepped slot widths in the radial direction. Short-circuit cage bars are placed in the trapezoidal slots, and the edge of the adjacent cage rotor module It is a stepped notch, and after splicing, a common trapezoidal groove is formed. The depth of the gap at the bottom of the groove reaches the outer surface of the sleeve, and a common cage is placed in the groove; The coupling capability of the sleeve windings is maximized, resulting in a new modular cage-rotor-stator self-excited synchronous motor structure with high power density and excellent steady-state and dynamic performance.

The invention discloses an electromechanical integral middle-arranged motor driver of a small scaled electrocar, including a motor, a controller, a sensor, a gear reducer, a one-way clutch, a chain tensioner and a shell. A fixing frame is mounted a middle axis position of a lower part of the small scaled electrocar. The middle-arranged motor driver is mounted on the fixing frame through a tensioning piece. The motor is a DC rare earth permanent magnet intermediate speed interior rotor motor. A motor shaft is in parallel to a big gear shaft and the middle axis. The controller is built-in and mounted in the driver shell or on the shell. The sensor is an acceleration sensor. The gear reducer is a single-stage reducer lubricated by lubricating grease or doped with small amount of lubricating oil. The shell is made of a light alloy or engineering plastics with high-impact and high size stability and is provided with a sealing rubber plug for leading out a wire harness. The periphery of the shell part is provided with a groove and sealed by a silicon rubber to form a full-sealing waterproof structure. The driver has a ingenious and compact structure, strong motive power, good performance and high reliability.

The invention belongs to the field of articles for daily use, and in particular relates to a self-powered intelligent walking stick. A walking stick main body consists of two outer shells; an energy storage cavity, a working cavity and a sliding groove are formed in the walking stick main body; external screw threads are formed at the lower end of the walking stick main body; the lower ends of the outer shells are connected with a supporting leg through screw threads; an anti-slip block is mounted at the lower end of the supporting leg; one to five energy transducers are arranged in the energy storage cavity; a sliding block is bonded to a conductive rubber pressing block; the conductive rubber pressing block is bonded to piezoelectric vibrators in the energy transducers; the sliding block is mounted in the sliding groove; the sliding block is connected with a short connecting rod through screw threads; the upper end of the short connecting rod is hinged to a long connecting rod; the long connecting rod is fixed to the interior of the working cavity through a rotating shaft; a limiting sliding groove is formed in the long connecting rod; an energy storage button is connected onto the limiting sliding groove; the right end of the long connecting rod is connected with the inner wall of the working cavity through a reset spring; an energy storage circuit board is fixed to the interior of a groove in the left side of the working cavity, and is connected with a positioning transmitting device.

The invention relates to a stator self-excitation synchronous motor with double cage barrier rotors and a control method thereof. The stator self-excitation synchronous motor is characterized in that an inner rotor and an outer rotor are positioned on inner and outer sides of a stator respectively; three-phase symmetry power windings and three-phase symmetry control windings are arranged in grooves on inner and outer surfaces of a stator; the rotors are spliced on the side which is close to the stator along the peripheral direction by using the same cage barrier rotor modules to form a rotor with a salient pole; each cage barrier rotor module is connected with a sleeve by positioning grooves and is provided with a plurality of trapezoid grooves; short-circuit cage bars are put into the trapezoid grooves; a stepped breach is formed in the joint of the adjacent cage barrier rotor modules; and after the adjacent modules are spliced, a public trapezoid groove is formed in the joint of the adjacent modules, the depth of a gap at the bottom of the groove reaches the surface of the sleeve, and public cage bars are put into the grooves. The invention aims to provide the stator self-excitation synchronous motor which is convenient to manufacture, can realize the brushless self-excitation of the stator, is high in power density and steady and dynamic properties and is provided with the double cage barrier rotors.

The invention discloses an integrated power system of internal combustion-linear power generation. The power system comprises a combustion chamber of an internal combustion engine with four strokes, which comprises a cylinder, a piston arranged inside the cylinder as well as an ignition device and a valve mechanism arranged on the cylinder. A linear motor with work modes of power generation and electro-motion comprises a linear motor rotor and a linear motor stator; wherein, the linear motor rotor is provided with a detecting component of piston movement positions and is connected with a piston inside the combustion chamber of the internal combustion engine with four strokes; the linear motor stator is connected with a reversible storage device of electricity through an electronic controlling unit connected with the ignition device, the valve mechanism, the electronic controlling unit, the reversible storage device of electricity and the detecting device of piston movement position respectively. The invention has high specific power and can realize the traveling of low compression ratio and high expansion ratio of the internal combustion engine and guarantee the separate working modes of traveling in different cylinders and groups with high load rate so as to improver the system efficiency.

The invention relates to a cage barrier spliced outer rotor stator electro-magnetic synchronous motor and a control method thereof. The motor is characterized in that an outer rotor is positioned outside a stator, a three-phase armature winding and a single-phase exciting winding are arranged in slots of the outer surface of the stator, and the same cage barrier outer rotor modules are connected with a sleeve made of a non-permeability magnetic material through positioning slots and spliced in a circumferential direction to form the outer rotor with inner salient pole types; the inner surface of each cage outer rotor module is provided with radial trapezoid-shaped slots which have multiple step slot widths along a radial direction, and short circuit cage bars are arranged in the slots; after the adjacent rotor modules are spliced, common trapezoid-shaped slots are formed on connection parts of the modules, gaps of the bottoms of the slots reach the inner surface of the sleeve, the slots have multiple step slot widths along the radial direction, and common cage bars are arranged in the slots; and the invention aims to provide the cage barrier spliced outer rotor stator electro-magnetic synchronous motor which is convenient to process and manufacture, can realize the stator-side excitation, and has high power density and the excellent steady state and dynamic performance.