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

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.

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.