148results about How to "Suitable for high speed operation" patented technology

An imaging device capable of obtaining high-quality imaging data is provided. The imaging device includes a photoelectric conversion element, a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, and a first capacitor. Variation in the threshold voltage of amplifier transistors can be compensated. Furthermore, the imaging device can have a difference detecting function for holding differential data between imaging data for an initial frame and imaging data for a current frame and outputting a signal corresponding to the differential data.

The invention discloses a novel flywheel energy storage device which is characterized in that a rotary shaft is arranged in the internal center of a vacuum container; a permanent magnetic radial bearing is embedded in the upper part of the rotary shaft; the middle and lower part of the rotary shaft are sleeved by a flywheel, a single-winding outer rotor magnetic suspension switch reluctance motor and radial and axial permanent magnet biased magnetic bearings in sequence from top to bottom; the single-winding outer rotor magnetic suspension switch reluctance motor is embedded in the inner side of the lower end of the flywheel; each set of windings is independently controlled, and radial two-degree-of-freedom suspension force can be provided in addition to electrical/power generation functions. According to the novel flywheel energy storage device, by utilizing the characteristic that the single-winding outer rotor magnetic suspension switch reluctance motor can directly drive the flywheel, and a high-speed self-suspension function, and organically combining the characteristics of good unloading property and controllable suspension of the axial permanent magnet bearing, the radial permanent magnet bearing and a hybrid magnetic bearing, the five-degree-of-freedom, low-loss and high-reliability suspension of the flywheel are realized, the running speed of the flywheel is increased, and the power consumption and volume of a system are reduced.

A semiconductor device including pixels arranged in a matrix of n rows and in columns, in which the pixels in the m-th column are shielded from light, is provided.

The invention discloses a mixed permanent magnetic pole-alternating and magnetic flux-switching memory motor and a winding switching magnetism-weakening control method thereof. The mixed permanent magnetic pole-alternating and magnetic flux-switching memory motor comprises a salient rotor and a stator, wherein the stator contains stator cores, aluminium-nickel-cobalt permanent magnets, neodymium-iron-boron permanent magnets, centralized armature windings and pulsed magnetism-adjusting windings; iron core edges of two adjacent outer U-shaped units and tangentially-magnetized long-stripped neodymium-iron-boron permanent magnets form a first permanent magnetic pole, while the circumferentially-inward (outward) and parallel-magnetized V-shaped embedded aluminium-nickel-cobalt permanent magnets and inner U-shaped units form a second permanent magnetic pole; mixed magnetic poles are in alternating polarity distribution; when the motor runs at a low speed, the pulsed magnetism-adjusting windings are in direct-current pulsed working state, while in a high-speed weak-magnetism area, the pulsed magnetism-adjusting windings are converted into alternating-current armature windings. Requirements on performance in a low-speed area and in the high-speed area can be met at the same time; influence of an armature reaction field on the aluminium-nickel-cobalt permanent magnets with low coercivity is small; the utilization rate of permanent magnetism, the torque density, and the reliability of system operation are high.

The invention discloses a flywheel energy storing device. The device includes a vacuum container arranged on the outer layer. A rotary shaft is arranged in the center of the vacuum container. A radial-axial permanent magnetic bearing is nested in the upper end of the rotary shaft. The lower end of the rotary shaft is sleeved with a flywheel, a single-winding outer rotor magnetic suspension switch reluctance motor, and a permanent magnetic bias radial-axial magnetic bearing successively from top down. The rotary shaft penetrates through the center of the flywheel and is connected with the flywheel. The flywheel is nested in an outer rotor of the single-winding outer rotor magnetic suspension switch reluctance motor. According to the invention, by combining that the single-winding outer rotor magnetic suspension switch reluctance motor can drive the flywheel directly and has a high-speed suspension function with that the radial-axial magnetic bearing and a hybrid magnetic shaft have characteristics of controllable suspension in forced uninstallation, five degree of freedom and high-reliability suspension of the flywheel are realized. Besides, operation speed of the flywheel is increased and system power consumption and size are reduced.

An imaging device capable of obtaining high-quality imaging data is provided. The imaging device includes a first circuit, a second circuit and a third circuit. The first circuit includes a photoelectric conversion element, a plurality of transistors including an amplifier transistor, and a plurality of capacitors. The second circuit includes a transistor. The third circuit includes a resistor and a transistor for controlling a current flowing in the resistor. The output signal of the imaging device is determined in accordance with the current flowing in the resistor. Variations in electrical characteristics of the amplifier transistor included in the first circuit can be compensated.

The invention discloses an axial magnetic field magnetic flux switching type surface-mounted permanent magnet memory motor. The permanent magnet memory motor comprises a first rotor (41), a second rotor (42), a stator (1) and an installing shaft, wherein the stator (1) is arranged between the first rotor (41) and the second rotor (42) and of an axial two-side symmetrical structure, the installing shaft is used for coaxially installing the stator (1), the first rotor (41) and the second rotor (42), and the stator is located between the two rotors to form an axial two-air-gap motor. The stator (1) is of the two-side symmetrical salient pole structure and comprises a stator iron core (2), a plurality of permanent magnets (3), a three-phase armature winding (5) and a single-phase pulse winding (6). The stator iron core (2) comprises a stator yoke (2.1) and stator teeth (2.2), wherein the stator teeth (2.2) protrude in the center direction of the first rotor (41) and in the center direction of the second rotor (42) respectively from the stator yoke (2.1). By the adoption of the permanent magnet memory motor, power density of the motor is improved, and the wide rotating speed operation range is possessed.

The invention discloses a short-stroke crankshaft connecting rod device for a tricot machine. The invention comprises eccentric shafts, a first shaft journal (4), a second shaft journal (5), a central wall plate (7), a grooved needle bed connected with a first eccentric shaft (1), a yarn guide needle bed crankshaft connecting rod mechanism, a stylet bed crankshaft connecting rod mechanism connected with a second eccentric shaft (2), and a sinker bed crankshaft connecting rod mechanism connected with a third eccentric shaft (3). The first shaft journal (4) and the second shaft journal (5) are respectively and fixedly connected with the end parts of the second eccentric shaft (2) and the third eccentric shaft (3). The second eccentric shaft (2), the first eccentric shaft (1) and the third eccentric shaft (3) are connected with each other in turn and are rotated around the first and second shaft journals (4, 5). The short-stroke crankshaft connecting rod device effectively shortens the motion stroke of weaving elements; the grooved needle travel is between 8 and 12 millimeters; the moving time of yarn guide needles is between 1.5 and 1.8 microseconds; the engine speed is improved to be 2500 to 3000 turns per minute; the noise is less than or equal to 85 decibels; the vibration is small; the energy consumption is low; the device is suitable for high-speed rotation; the power is small; and the productivity is obviously improved.

To provide an imaging device capable of obtaining high-quality imaging data. The imaging device includes a first circuit and a second circuit. The first circuit includes a photoelectric conversion element, a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, a first capacitor, a second capacitor, and a third capacitor. The second circuit includes an eighth transistor. The imaging device can compensate variation in threshold voltage of an amplifier transistor included in the first circuit.

The invention discloses a magnetic flux-switching generator, which comprises a stator, a rotor, a magnet exciting coil and an armature coil, wherein the number of the poles of the rotor is equal to the number of the slots of the stator; the two circle edges of the armature coil are positioned in two adjacent slots of two adjacent stator gears; winding coils are connected end to end in series in turn to form single-phase centralized armature windings; and the magnet exciting coil is vertical to the armature coil. In the invention, the single-phase centralized armature windings and a permanent magnet or/and single-phase centralized magnet exciting windings are adopted in the stator part, the rotor has straight or slant slots and the number of the poles of the rotor is equal to that of the slots of the stator; and thus, the generator retains the structural advantages of compactness, simplicity, high robustness and suitability for high-speed rotation of the conventional magnetic flux-switching generator and can be directly used as a single-phase alternating current power supply due to the same phase of the electrodynamic potentials generated by the coils, and the cost of the generator is low.

The invention discloses a magnetic flux switching type permanent magnet memory motor comprising an enclosure, a stator contained in the enclosure, a rotor (2) and a non-magnetic rotary shaft (8). The magnetic flux switching type permanent magnet memory motor is characterized in that the stator (1) is arranged at the outer part of the rotor (2); the rotor (2) is fixedly arranged on the non-magnetic rotary shaft (8) and is in a convex pole type; the rotor (2) comprises a rotor main body part and rotor teeth which protrude from the main body part to a direction which is far away from the center of the rotor; the stator comprises a stator iron core (1), a permanent magnet (3), a three-phase armature winding (4) and a pulse winding (5); the stator iron core (1) comprises a plurality of stator yokes and stator teeth (1.1) which protrude from the stator yokes to the direction of the center of the stator iron core; and the three-phase armature winding (4) is wound on the stator teeth (1.1). According to the magnetic flux switching type permanent magnet memory motor disclosed by the invention, a motor no-load gap magnetic field is adjustable, and the weak magnetism capability and the rotary speed operation speed of the motor are improved; and meanwhile, the torque and the power density of the motor are improved and the copper consumption of the motor is reduced.

Present invention relates to a automatically magnetic weakening permanent-magnet machine rotor for raising motor slow speed torque and high-speed efficiency, and widening motor speed adjustable range. It contains rotor core, number of main pole permanent magnets, number of auxiliary permanent magnet, radial sliding chute, and auxiliary permanent magnet. Said invention can be used in permanent magnet motor and permanent magnet generator.

The invention discloses a magnetism-gathering-type magnetic flux switching permanent magnet memory motor, which comprises a stator, a rotor (2) and an un-conducted magnetic shaft (8), wherein the stator (1) is arranged outside the rotor (2); the rotor (2) is fixed on the un-conducted magnetic shaft (8) and is in a salient pole type; the stator comprises a stator core (1), a first permanent magnet (3a), a second permanent magnet (3b), a three-phase armature winding (6), a first pulsed winding (4a) and a second pulse winding (4b); the stator core (1) comprises a plurality of stator yokes and stator teeth protruding to the center direction of the stator core from the stator yokes; and a stator slot is formed between the adjacent stator teeth. With the adoption of the magnetism-gathering-type magnetic flux switching permanent magnet memory motor, the residual magnetization of the permanent magnet is adjusted through applying pulse current to a pulse winding; a motor no-load air-gap field can be adjusted; the weak magnetic ability of the motor and the rotating speed operation range are improved; and meanwhile, the torque and power density of the motor can be effectively improved through magnetism-gathering-type armature teeth, and the copper loss of the motor is reduced.

The invention discloses a rotor-permanent-magnetic type doubly-salient motor. The rotor-permanent-magnetic type doubly-salient motor comprises a stator iron core, armature coils, a rotor iron core and permanent magnets, wherein the stator iron core and the rotor iron core are of salient structures; the stator iron core is provided with stator teeth; each coil in the armature coils cross on one stator tooth; the rotor iron core comprises U-shaped magnetic-permeating units and a ring-shaped magnetic-permeating bridge; the U-shaped magnetic-permeating units are fixed on the magnetic-permeating bridge and are opposite to the stator teeth; the quantity of the permanent magnets is equal to that of the U-shaped magnetic-permeating units; and the permanent magnets are embedded between every two U-shaped magnetic-permeating units, are magnetized tangentially and are consistent in the magnetizing direction. The rotor-permanent-magnetic type doubly-salient motor disclosed by the invention has the advantages of doubly-salient armature permanent-magnetic chains and high-sine each-phase no-load inductive potential, and simultaneously has the advantages of higher space utilization rate and permanent-magnet utilization rate and high torque density and power density.

The invention discloses a double-speed winding switch reluctance motor. Stator teeth in even number are arranged on a stator, and concentrated windings are arranged on the stator teeth. The concentrated windings comprise low-speed concentrated windings and high-speed concentrated windings, and the number of turns of the low-speed concentrated windings is more than that of the high-speed concentrated windings. The wire diameter of each low-speed concentrated winding is smaller than that of one high-speed concentrated winding, and in two adjacent stator teeth, one stator tooth is coiled with a low-speed concentrated winding, and the other stator tooth is coiled with a high-speed concentrated winding. A low-speed concentrated winding is arranged on the opposite side of another low-speed concentrated winding in the radial direction of the stator, and moreover the two low-speed concentrated windings are connected in series or in parallel to form a one-phase low-speed winding. The opposite side of each high-speed concentrated winding is provided with another high-speed concentrated winding in the radial direction of the stator, and the two high-speed concentrated windings are connected in series or in parallel to form a one-phase high-speed winding. The double-speed winding switch reluctance motor can output large torque in low-speed operation, and has a wide speed regulation range in high-speed operation.

An efficient means for transmitting digitized return path signals over a cable television return path is disclosed. In one embodiment of the invention, the cable television return path includes a node that receives an analog return signal from a subtree of the cable television system and generates a digital transport signal representative of the analog return path signal. The digital transport signal, however, is not a digitized form of the analog return signal. Rather, the digital transport signal is encoded such that fewer bits are used to represent the analog return signal without substantially impacting the accuracy and dynamic range of the signal. At the hub, the digital transport signal is decoded and converted to produce an analog signal that is a close approximation of the analog return signal.

The invention discloses a double-stator doubly salient hybrid excitation motor drive system, and the system comprises fault reconstruction five-phase T-type three-level inverters and a double-stator doubly salient hybrid excitation motor; two sets of windings of the double-stator doubly salient hybrid excitation motor are separately powered by two sets of fault reconstruction five-phase T-type three-level inverters, and the two sets of fault reconstruction five-phase T-type three-level inverters are independent with each other. The double-stator doubly salient hybrid excitation motor adopts a double-stator structure which comprises an outer stator, an inner stator, doubly salient rotor, a permanent Nd-Fe-B magnet, a permanent Al-Ni-Co magnet, a magnet regulating coil and an armature winding; and the two stators share one doubly salient rotor. According to the invention, the double-stator doubly salient hybrid excitation motor drive system is provided, a control method of the system is also provided, and the system has advantages of high power density, high efficiency, high reliability, high magnet regulating ability and the like.

The invention discloses a stator permanent magnet type cursor motor structure for reducing positioning force. The structure comprises a primary portion and a secondary portion, wherein an air gap is formed between the primary portion and the secondary portion, a plurality of virtual slots and a plurality of virtual teeth are arranged at the tooth end of each tooth of the primary portion in the moving direction of a motor, the number of the virtual teeth is N1, the number of the virtual slots is N2, the relation of N1 and N2 is N1=N2+1, and the N2 is an odd number larger than 1; a fourth permanent magnet is embedded in the virtual slot right in the middle, and magnetism gathering modules are embedded in the other virtual slots; the magnetizing direction of the fourth permanent magnet is perpendicular to the moving direction of the motor and is towards the air gap; each magnetism gathering module is formed by sequentially and tightly attaching three permanent magnets, wherein the magnetizing direction of the middle permanent magnet is perpendicular to the moving direction of the motor and is towards the air gap, the two permanent magnets on the two sides are relatively magnetized, and the magnetizing direction is the same as the moving direction of the motor; due to the matching of the permanent magnets and the magnetism gathering modules, the positioning force can be reduced, and meanwhile performance indexes such as no-load counter electromotive force, thrust output and the dosage of the permanent magnets are not affected.

The invention discloses a less-rare-earth multi-excitation-source double-stator flux-switching memory motor, which belongs to the technical field of motor body design and operating principles. Coaxial outer stators, rotors and inner stators are sleeved together in turns from outside to inside to compose the memory motor, wherein a radial air gap exists between the outer stators and the rotors, the rotors and the inner stators, the outer stators are composed of armature core teeth, fault-tolerant teeth and stator yokes, and the rotors are composed of a rotor support, a magnetic silicon steel block and a magnetic insulation block, and meanwhile, the inner stators are composed of the inner stator core and a combined permanent-magnet cell block. The double-stator structure of the motor realizes the separation of armature winding and permanent magnet and solves the problem that multiple excitation sources inside the traditional flux-switching permanent magnet motors restrain each other, thereby easily increasing motor power density and torque density. The memory motor maintains high air-gap flux density and ensures of the motor power density and the torque density, meanwhile, the consumption of rare-earth permanent-magnetic materials is effectively lowered. On the other side, the memory motor can realize flexible adjustment of a motor air-gap field and expand the range of speed operation.