41results about How to "Reduce the number of winding turns" patented technology

The invention discloses a magnetic integrated mixed type power distribution transformer. The main circuit comprises a main transformer, a series isolation transformer and a converter unit; an iron core structure consists of iron core columns, iron yokes and magnetic flux leakage iron cores; the main transformer is formed by winding a secondary winding, a primary winding and a control winding on main transformer iron core columns by adopting a layered winding mode; the series isolation transformer is formed by winding a valve side winding and a grid side winding on isolation transformer iron core columns in an overlaid manner by adopting a cake type winding mode; the valve side winding and the control winding both adopt a star-shaped neutral point leading-out connection method, and are connected to the voltage output end and the current output end of the converter unit respectively; the magnetic flux leakage iron core is placed between the primary winding and the control winding, and between the valve side winding and the grid side winding separately, so that the magnetic integration design for connecting the output of the transformer and the converter with an inductor is realized;the main transformer and the series isolation transformer share one middle iron yoke, so that weak coupled integration between the main transformer and the series isolation transformer is realized; and each winding adopts a phase shifting arrangement mode, so that utilization rate of a ferromagnetic material is improved effectively.

The invention relates to a permanent magnet gyro motor with double stators and a through-hole bearing. The permanent magnet gyro motor comprises the stators, a rotor, two thrust plates and a shaft, wherein the shaft is coaxially sleeved in a bearing hole of a rotor bearing cover; the two thrust plates are respectively arranged at the left and right ends of the shaft according to a working manner of a hydrodynamic gas-lubricated bearing, and are fixed by inner nuts; the left end and the right end of the rotor are respectively provided with a stator; and the two stators are fixed on a shaft by outer nuts. The permanent magnet gyro motor is scientific in design, and reasonable in structure. According to the technology, the aim that the three-phase permanent magnet gyro motor (with the double stators and the through-hole type hydrodynamic gas-lubricated bearing) of a position-free sensor is applied in the field of gyros can be realized, so that the precision of the gyro and an inertial navigation system can be obviously improved, and the permanent magnet gyro motor is advanced in technology, and fills the technology blank in China.

The invention discloses a permanent-magnet wind-driven generator capable of realizing self-acceleration of a magnetic field. The generator comprises a rotor (1), an air gap (2) and a stator (3) which are arrayed coaxially from outside to inside, and the air gap (2) is reserved between the rotor (1) and the stator (3). The rotor (1) comprises a plurality of rotor cores (11) and rotor permanent magnets (12), wherein the rotor cores (11) are equidistantly arrayed at intervals, and each rotor permanent magnet (12) is embedded into each two adjacent rotor cores (11). The stator (3) comprises a stator yoke (31), a plurality of stator teeth (32) and multiphase symmetrical armature windings (33), wherein the stator yoke (31) is coaxial to the rotor (1), the stator teeth (32) project over the periphery of the stator yoke (31), a stator inter-tooth space is arranged between each two adjacent stator teeth (32), and the multiphase symmetrical armature windings (33) are embedded into the stator inter-tooth spaces. The permanent-magnet wind-driven generator realizes self-acceleration of the magnetic field by means of magnetic field modulating action of the stator teeth, a stator structure is simple, the armature windings are convenient to wind, the rotor is low-speed, high-torque and high in direct-driven capability, and accordingly the permanent-magnet wind-driven generator is applicable to the low-speed and high-torque fields of wind-driven generation and the like.