36results about How to "Improve sinusoidality" patented technology

The invention relates to a permanent magnet synchronous motor without a stator iron core, which mainly comprises a rotor shaft, an inner rotor iron core, a magnetic isolation block, a hollow cup stator (including a skeleton and a fractional slot concentrated winding), a Halbach permanent magnet and an outer rotor iron core, wherein the magnetic isolation block is embedded in the inner rotor iron core and forms an inner rotor core component part with the inner rotor iron core, the inner rotor iron core, the outer rotor iron core and the permanent magnet are all connected with the rotor shaft, the Halbach permanent magnet is stuck to the outer rotor iron core, and the hollow cup stator is fixed on a motor shell. The permanent magnetic circuit is formed into a closed loop circuit via the inner rotor iron core, the magnetic air gap, the Halbach permanent magnet and the outer rotor iron core. The invention utilizes the magnetic isolation block to achieve a salient pole structure of the motor so as to realize control by the difference of A-axis and D-axis inductance, the concentrated winding is utilized to weaken harmonic content in winding induced electromotive force and greatly increase the sinusoidal property of the winding induced electromotive force and winding current, so the torque impulse is reduced, and the stationarity of the output torque is improved.

The invention provides a hybrid permanent magnet rotor for an electric vehicle, belonging to the technical field of electric vehicle motors. The rotor is an inner rotor structure, comprising a first permanent magnet, a second permanent magnet, a third permanent magnet, a non-magnetic conductive fixed core, a rotor iron core and a tightening ring, and the rotor iron core is fixed on the periphery of the non-magnetic conductive fixed core; The first permanent magnet, the second permanent magnet and the third permanent magnet are the same in number and even in number, and are combined into a shape. The outer side of the rotor is provided with a tightening ring to prevent deformation of the rotor. Compared with the existing permanent magnet synchronous motor rotor, it saves part of the scarcerare earth permanent magnet, has higher magnetic field strength, higher mechanical strength, effective use of reluctance torque, and higher output power.

The invention provides an electric vehicle permanent magnet synchronous driving motor and belongs to the technical field of electric vehicles. The driving motor is an inner rotor structure and includes first permanent magnets, second permanent magnets, a nonmagnetic fixed core, a rotor core and a stator, wherein the rotor core is internally fixed to the nonmagnetic fixed core; the number of the first permanent magnets and the number of the second permanent magnets are the same and are both even numbers; the first permanent magnets and the second permanent magnets have different lengths and arein [lambda] shapes; the outer side of the rotor core has a high-strength steel hoop. Compared with the existing permanent magnet synchronous motor, the electric vehicle permanent magnet synchronous driving motor has higher magnetic field strength, larger output power, larger mechanical strength, and lower torque ripple, can utilize reluctance torque, and has better sinusoidality in the air gap flux density.

A sine stripe configuration light project equipment based on acousto-optic deflector relates to acousto-optic deflector, double DDS signal generator equipment, mixing multiplier, power amplifier, confection laser, light system and computer controlling system. The acousto-optic deflector produces intervened stripe. Double DDS signal generator equipment produces two-way driving signal. Mixing multiplier mixes the center frequency of the acousto-optic deflector and the confection signal of the DDS. Power amplifier amplifies the power of the mixing signal. Confection laser offers coherent light source and incepts driving signal of laser from DDS. Light system relates to collimating mirror, projection lens and diaphragm which filtrates the 0 level diffraction light from the acousto-optic deflector. Computer control system controls the frequency and phase of the double DDS signal generator equipment to bring the signal, adjusts and controls the brightness and duty ratio of the high frequency confection laser.

The invention discloses a novel stator winding structure based on an axial coreless motor, and the structure comprises at least three single coils with the same specification, the at least three single coils are annularly distributed to form a winding, and each single coil of the winding is arranged in an annular non-uniform manner. The novel stator winding structure based on the axial coreless motor can effectively reduce the higher harmonics of counter electromotive force of the motor and can improve the sinusoidal property of counter electromotive force waveforms. The stator winding is simple in process, convenient to assemble and low in cost, the working efficiency of the motor is improved, the cost performance and the flexibility of processing and manufacturing are also improved, andthe mechanical strength and the heat dissipation characteristic are better.