42results about How to "Increase working point" patented technology

The invention discloses a mid-series type hybrid permanent-magnet adjustable flux motor having passive adjustable flux magnetic barriers, and belongs to the field of permanent-magnet motors, and solves the problem that advantages of serial and parallel hybrid permanent-magnet adjustable flux motors cannot be combined. The mid-series type hybrid permanent-magnet adjustable flux motor comprises a stator iron core, an armature winding, a rotor iron core and a rotating shaft; the rotor iron core is fixed on the rotating shaft, and is positioned inside the stator iron core; the armature winding isarranged on the stator iron core; the mid-series type hybrid permanent-magnet adjustable flux motor further comprises low-coercivity permanent-magnet slots, low-coercivity permanent magnets, radial slots, high-coercivity permanent magnets and the passive adjustable flux magnetic barriers; the low-coercivity permanent-magnet slots and the radial slots are distributed on the rotor iron core alternately and uniformly along a circumferential direction; the low-coercivity permanent-magnet slots and the radial slots are penetrated through the whole motor along an axial direction; the low-coercivitypermanent magnets are installed in the low-coercivity permanent-magnet slots; and the high-coercivity permanent magnets and the passive adjustable flux magnetic barriers are jointly installed in the radial slots.

The invention discloses a split type combined permanent magnet brushless motor for an electric vehicle. A rotor is coaxially positioned in the internal of a stator; a rectangular neodymium iron boron permanent magnet steel and two same rectangular ferrite permanent magnet steels are fixedly embedded in each pole of the rotor; the neodymium iron boron permanent magnet steels are close to air gaps and are symmetrical relative to the central line of the rotor poles; the two ferrite permanent magnet steels are close to a rotation shaft, are distributed on the two sides of the central line of the rotor poles and are symmetrical relative to the central line of the rotor poles; a magnetic conductive bridge is between the two ferrite permanent magnet steels; the permanent magnet steel on each pole is magnetized along the tangential direction of the circumference; the magnetizing directions on the same pole are the same, and the magnetizing directions on the adjacent two poles are opposite; the rare earth permanent magnet material and the non-rare-earth ferrite permanent magnet material are adopted at the same time; on the basis of ensuring the power density and the torque density of the permanent magnet motor with a small amount of rare earth, the cost of the motor is reduced by more than 50%; and in addition, the requirements on the torque and the power in the electric vehicle applications can be met on the premise of keeping the relatively high power density and the torque density.

The invention discloses a double-V-shaped hybrid permanent magnet adjustable magnetic flux memory motor, and belongs to the field of permanent magnet motors. According to the invention, the problem inthe prior art that the advantages of serial and parallel hybrid permanent magnet adjustable magnetic flux motors cannot be considered at the same time can be solved. According to the technical schemeof the invention, 2P V-shaped low-coercive-force permanent magnet grooves and V-shaped high-coercive-force permanent magnet grooves are alternately and uniformly formed in a rotor iron core in the circumferential direction. Each V-shaped low-coercive-force permanent magnet groove is provided with a pair of low-coercive-force permanent magnets. Each V-shaped high-coercive-force permanent magnet groove is provided with a pair of high-coercive-force permanent magnets. Each straight groove of each V-shaped high-coercive-force permanent magnet groove is provided with an additional magnetic flux path. A pair of low-coercive-force permanent magnets of the V-shaped low-coercive-force permanent magnet grooves and the high-coercive-force permanent magnets in the two V-shaped straight grooves adjacent to the low-coercive-force permanent magnet grooves are combined to form a magnetic pole. The V-shaped low-coercive-force permanent magnet grooves and the V-shaped high-coercive-force permanent magnet grooves penetrate through the whole motor in the axial direction.

The invention discloses a permanent magnet synchronous direct-drive motor. A rotor iron core sleeves a shaft. The outer periphery of the rotor iron core is evenly equipped with a plurality of semi-open slots. A plurality of permanent magnets are adhered to the outer periphery of the rotor iron core. Epoxy resin is arranged among the permanent magnets and among the semi-open slots through embedding. The two end faces of the rotor iron core are equipped with non-magnetic-conductive metal end plates. A stator iron core of a stator is evenly equipped with a plurality of open slots at the periphery. Notches of the open slots face the inner side of the stator, and stator windings are disposed in the open slots respectively. The notches of the open slots are provided with magnetic conductive blocks, and are plugged by the magnetic conductive blocks. The motor of the invention is increased in pass mass ratio, exhibits high structural reliability, is easy to manufacture, and can response quickly. The harmonic wave content of an air gap magnetic field of the permanent magnet motor and the rotor loss of the motor are reduced, the magnetic leakage coefficient and the reactance of the motor are increased, short circuit currents are minimized, the operating points of the permanent magnets are improved, and the reliability of the permanent magnet synchronous direct-drive motor is improved.

The invention discloses a U-shaped structure magnetism gathering type permanent magnet motor. The permanent magnet motor mainly structurally comprises a rotor and a stator and can be a linear motor or a rotary motor. The permanent magnet motor is mainly characterized in that the stator (mover) is of a U-shaped structure, the mover (stator) is embedded into the U-shaped stator (mover), and a certain air gap is kept between the mover (stator) and the U-shaped stator (mover). The rotor and the stator are provided with a plurality of permanent magnets which are installed according to a characteristic installation mode, a strong magnetic gathering effect is achieved, a magnetic field working point of a main magnetic circuit is remarkably increased, a magnetic leakage coefficient is reduced, then higher thrust density is obtained under the condition of smaller volume and weight, and meanwhile the magnetic field magnetic field magnetic field permanent magnet motor has lower cost and a simpler assembly mode. In addition, by saving the number of permanent magnets on the U-shaped stator (mover), the stator (mover) non-magnetic track motor structure can be simplified into a stator (mover) non-magnetic track motor structure which is lower in cost, simpler to assemble and more suitable for long-stroke occasions.

The invention relates to a magnetic circuit split type V-shaped parallel combined magnetic pole adjustable magnetic flux motor with a double-layer magnetic barrier, belongs to the field of a permanentmagnetic motor and aims to solve a problem that a motor utilizing the high coercive and low coercive permanent magnet combined magnetic pole structure has the function of suppressing demagnetizationof a high coercive permanent magnet is solved. The motor is characterized in that a V-shaped axially-through high coercive permanent magnet slot is disposed under each pole of a rotor core, a pair ofrectangular axially-through low coercive permanent magnet slots are symmetrically disposed under each pole of the rotor core, two slot ports of the high coercive permanent magnet slot are respectivelyconnected with one low coercive permanent magnet slot, two adjacent low coercive permanent magnet slots are parallel under different poles, the rotor core in the enclosed area of the two low coercivepermanent magnet slots and the high coercive permanent magnet slot under the same pole is symmetrically provided with a pair of double-layered arc-shaped magnetic barriers, two long arcs of the adjacent double-layered arc-shaped magnetic barriers under different poles are on the same concave arc, and two short arcs are on the same concave arc.

An optical receiver suitable for connecting to a photodiode generating a photocurrent with a sensing resistor and a diode circuit in parallel with the sensing resistor to limit the voltage across the sensing resistor. The diode circuit allows for a larger resistor providing greater sensitivity without risking violating the necessary headroom available to the photodiode.

The invention discloses a series-parallel magnetic pole type hybrid permanent magnet memory motor. The motor comprises a stator, an armature winding, a hybrid permanent magnet rotor and a rotating shaft. The armature winding is arranged on the stator; the hybrid permanent magnet rotor is arranged inside the stator; the rotating shaft is arranged inside the hybrid permanent magnet rotor; and a plurality of V-shaped magnetic poles with the same structural form are evenly distributed in a circumferential direction of the hybrid permanent magnet rotor, each V-shaped magnetic pole comprises a firstpermanent magnet and a second permanent magnet which are symmetrically distributed in a V-shaped radial direction, a coercive force of the first permanent magnet is smaller than that of the second permanent magnet, and the first permanent magnet and the second permanent magnet are magnetized in a tangential direction. In the invention, a design space of the rotor can be further expanded through the series-parallel magnetic pole structure so that a magnetic regulation range of the motor is improved, and the motor has high torque density and a strong magnetic stabilization capability.

The invention discloses a consequent pole series magnetic circuit hybrid permanent magnet memory motor, which comprises a stator, a hybrid permanent magnet rotor and a non-magnetic rotating shaft, and is characterized in that the stator comprises a stator yoke, stator iron core teeth, stator slots and armature windings; the hybrid permanent magnet rotor comprises a rotor iron core, a V-shaped groove, a linear groove, an air magnetic barrier, a first permanent magnet and a second permanent magnet. The first permanent magnet and the second permanent magnet form a series magnetic circuit, the working point of the second permanent magnet can be improved, the magnetic stabilization effect is enhanced, the second permanent magnet is magnetized in the radial direction, and flexible adjustment of air gap flux density can be achieved; a consequent pole design is adopted, and a half of permanent magnetic poles are replaced by iron core poles, so that the torque performance of the motor is maintained, and the flux adjusting current of the motor is effectively reduced by reducing the use amount of direct-axis permanent magnets; short-time current pulses are used for magnetic adjustment, almost no magnetic adjustment copper loss exists, the low-coercivity permanent magnets can be subjected to online repeated magnetic adjustment, and magnetic adjustment control is similar to traditional vector control and easy to achieve.