73results about How to "Reduce the number of windings" patented technology

A coil winding number variable type motor for varying a cooling and heating capacity of a reciprocating motor includes: a plurality of coils separately wound and connected in series to each other so as to vary turn ratio among motor coils; a plurality of relays respectively connected between adjacent coils among the plurality of coils; and a relay controller for outputting and ON/OFF control signal for varying the winding number of the motor coil and controlling the relays according to a change in a load and a power supply voltage. The coil wound in the motor of the reciprocating compressor is divided into the main coil and the plurality of sub-coils and the winding number of the motor coil is varied by itself to control the stroke of the reciprocating compressor, thereby effectively coping with the change in the voltage or the load.

The machine in accordance with the present disclosure is an AC machine whose pole numbers can be switched (from pole p₁ to pole p₂), and whose number of series turns per phase N can be switched say from N₀=N_rated to N₁=N₀/2. Furthermore, it employs an inverter so that the frequency can be changed from a low value (e.g., 5 Hz) to a high value (e.g., 200 Hz). Due to the combination of pole number and number of series turns switching/reconfiguration, a high torque at low speed (e.g., 0 rpm) and a high torque at high speed (e.g., 5,000 rpm) can be achieved, making mechanical gears obsolete. In addition, the output power of the motor can be increased at high speed in direct proportion to the speed increase.

The present invention relates to a kind of Mn-Zn ferrite, belonging to the field of oxide magnetic material technology, its main components are: Fe2O3 49-58 mole%, MnO 21-31 mole % and ZnO 15-26 mole%, and the additive component is added, they can be made into ring magnetic core whose mean grain size is 20-80 micrometer, outer diameter is 25 millimeter, inner diameter is 15 millimeter and height is 5 millimeter. In the frequency range of 1K-150 KHz its magnetic conductivity can be up to high level more than 12000, when it is used for making transformer, the number of turns can be reduced, said transformer can be miniaturized, specially, the transformer with high-frequency characteristics can be obtained in the digital transmission system of ISDN and ADSL, etc. and low volume distribution can be implemented, and the signal can be accurately transmitted.

Embodiments of the invention provide an array substrate, a display panel and a display device. The array substrate comprises display areas, non-display areas and an optical component arrangement area;the non-display areas include a first non-display area and a second non-display area; the display areas include a first display area and a second display area; the first non-display area surrounds the optical component arrangement area; the display area surrounds the first non-display area; the second non-display area surrounds the display area; and the second display area is located between thefirst non-display area and the second non-display area, and communicates with the first non-display area and the second non-display area. The pixel density of the second display area is set to be smaller than the pixel density of the first display area, so that the size of the first non-display area is reduced, the area of the effective display area is increased, the phenomenon of uneven display is improved, and the display effect is improved.

A display apparatus with a touch detection function capable of improving accuracy is provided. The display apparatus includes: a pixel array having a plurality of pixels arranged in a matrix form; and a plurality of signal wires arranged in the pixel array. Here, when an externally-detecting object is detected, a plurality of coils having areas overlapping with each other are formed of a plurality of signal wires (drive electrodes) among the plurality of signal wires, and a magnetic field generated in the plurality of respective coils are superimposed in an overlapped area by supplying a drive signal to the plurality of coils.

An electric drive for a hand-held power tool. An electric supply line contains two or more stranded wires. An electric motor is electrically connected to the stranded wires. The stranded wires pass at least twice through the eye of a toroidal core. A partition divides the eye into several sectors. Precisely one of the stranded wires passes through each of the sectors. The stranded wires are arranged along the circumference of the eye so as to follow each other cyclically.

An air core motor-generator has a rotor that is journalled to rotate about an axis of rotation, and a stator that is stationary and magnetically applies torque to the rotor. The rotor has magnetic poles that drive magnetic flux across an armature airgap, and the stator has an air core armature located in the armature airgap. Windings on the armature cause AC voltage to be induced in the windings as the rotor rotates. The windings include active length portions that are located in the armature airgap to receive the magnetic flux and induce the AC voltage, and end turn portions that traverse circumferentially and connect together the active length portions. The magnetic poles have a circumferential pole pitch, Y, and the active length portions of the windings having an active length circumferential width of a single phase, X, such that 0.5 Y<X<Y.

A co-axial magnet configuration for the production of a magnetic field and investigational volume which is suitable for measurement of magnetic resonance has at least one superconducting solenoid coil or solenoid coils which are radially nested within each other, wherein the windings of the solenoid coil(s) in a radial region about the axis of the magnetic configuration are disposed between r1 and r2, wherein r1<r2 is characterized in that the windings are surrounded by at least one rotationally symmetric magnet body made from ferromagnetic material which extends over a radial region between r3 and r4 wherein r3<r4 wherein r2<r3<1.3 r2 and r4>1.3 r3, wherein the rotationally symmetric magnet body or bodies are structured, dimensioned and positioned in such a fashion that the magnetic field is homogenized in the investigational volume and the magnetic fringe field outside the magnet configuration is essentially suppressed to permit the production of strong magnetic fields of high homogeneity without requiring notches in the coil configuration.

An insulation ageing test device of frequency conversion high voltage pulse equipment is prepared as connecting output end of pulse generator to primary edge of high voltage boosting transformer with its secondary edge being connected to wire in insulation sleeve, applying 300H2 to lkH2, 1kH2 to 5kH2 , 5kH2 to 10k H2 and 10k H2 to 20k H2 as operation frequency of high voltage boosting transformer alternately, connecting said boosting transformer to output of pulse generator for outputting square wave to meet requirements of insulation ageing test.

The invention discloses a (3N+3) switched cascaded based multi-port energy-feedback high-voltage converter and a control method thereof. The multi-port energy-feedback high-voltage converter is formedby cascading a plurality of (3N+3) switch units, each (3N+3) switch unit comprises a three-phase bridge-type pulse width modulation (PWM) rectifier, a DC-side capacitor and a (3N+3) switch converter,N three-phase output ports are formed in the (3N+3) switch converter and are sequentially recorded as a port 1, a port 2 until a port N, the multi-port energy-feedback high-voltage converter is formed by cascading the plurality of (3N+3) switch units, the port 1 of the (3N+3) switch converter in each (3N+3) switch unit employs an inductance cascading mode, and the other ports of the (3N+3) switchconverter in each (3N+3) switch unit employ a three-phase transformer cascading mode. By the multi-port energy-feedback high-voltage converter, a plurality of load ports can be provided, regenerationenergy among a multi-port load can be directly utilized, the energy utilization efficiency is improved, the feedback power grid pressure is reduced, and meanwhile, the equipment volume also can be reduced.

The invention relates to a set of AC phase-changing transformer capable of changing phase number and changing voltage, and a power transmission method of the transformer. The transformer suitable for three-phase and two-phase AC power transmission is characterized in that the transformer can transmit power in a single-phase single-line and grounded manner at the high-voltage side; and the transformer at the power consuming end is also provided with an exciter besides a single-phase winding at the primary side. The transformer is simple, convenient and effective in changing a single-phase power to a three-phase or two-phase AC power meeting the power requirement, thereby relatively lowering the cost for suspending power transmission lines and the facility cost. In addition, the number of windings of the transformer is reduced by obviating phase-to-phase voltage so as to facilitate insulation of the transformer. Accordingly, the transformer provided by the invention is beneficial to improvement on transmission voltage and reduction of cross section area of power transmission wires.

The embodiment of the invention provides a display panel and a display device, relates to the technical field of display, and is used for reducing the size of a frame at a notch area of the display panel. The display panel comprises a display area. a gap region and a first non-display region, The first non-display area is located between the display area and the notch area. the display area comprises a first display area and a second display area which are arranged along a first direction; the first display area comprises a first sub-display area and a second sub-display area which are arranged along a second direction; in the second direction, the notch area is located between the first sub-display area and the second sub-display area, the first direction is perpendicular to the second direction, the first display area comprises a plurality of first signal lines which are arranged in the first direction and extend in the second direction, and the second display area comprises a plurality of second signal lines which are arranged in the first direction and extend in the second direction; In the first direction, the number of the first signal lines included in the unit length is smaller than the number of the second signal lines included in the unit length.

An electrode assembly for a secondary battery, a method of manufacturing the electrode assembly and a secondary battery having the electrode assembly. The electrode assembly includes a plurality of electrode members arranged in a stacked shape along a baseline extending in one direction and a separation unit separating two adjacent electrode members. The separation unit includes three or more separators having a same winding center.

The invention discloses a current-source-type multi-input full-bridge converter with a single primary winding, belonging to the field of power electronic converters. The converter comprises N input channel circuits, a full-bridge converter circuit (20) and an output rectifier circuit (30), wherein N is a natural number larger than 1, each input channel circuit comprises a DC power source, an inductors, a switching tube and a diode, the cathodes of all the diodes in the N input channel circuits are connected, the cathodes of all the DC power sources are connected, the full-bridge converter circuit (20) comprises four full-bridge switching tubes and one transformer, and the output rectifier circuit (30) comprises a full-bridge rectifier circuit and a filtration capacitor. The transformer of the converter provided by the invention is provided with only one winding and 4+N switching tubes so that small converter size and simple structure are achieved. When the switching tubes in the input channels are simultaneously switched off, the DC power sources are connected in parallel to supply power to the loads so that a plurality of input sources supply power to the loads simultaneously or in shared time.

A method and apparatus to perform tile binning for tile-based rendering include obtaining information about paths defining an object to be rendered. The method classifies one of the paths into a first group and another of the paths into a second group based on shapes of the paths, and performs the tile binning based on the classification.

This invention relates to a control device for leak current including: a zero-order current mutual inductor, a primary coil, a secondary coil and a supply cut-off part, in which, the primary coil contains a supply line, a neutral line and a surface line, and the supply line passes through the zero-order current mutual-inductor and is connected with the first cut-off switch, the neutral line passes through the mutual-inductor and is connected with the second cut-off switch, one end of the surface line is contacted with the metal surface shell of the supply line and the neutral line, the other end winds the mutual-inductor and is connected with the supply line and the neutral line by resistors, a test line, one end of which contacts with the surface line and the other end is connected with a test switch by a resistor and connected with the supply line via the test switch, which can tests out leak current and earth fault current at the same time.

The invention discloses a method for winding a coil of a three-phase motor. The three-phase motor comprises a stator, a rotor and coil sets, wherein the stator is provided with twenty four coil slots which are ranked clockwise or anticlockwise; the rotor is provided with a quadrupole composed of a permanent magnet; the coil sets comprise the first-phase coil set, the second-phase coil set and the third-phase coil set; the first-phase coil set, the second-phase coil set and the third-phase coil set are in Y-type connection and respectively comprise two windings wound around the coil slots; the multiple coil slots are formed between the first-phase coil set and the second-phase coil set and between the second-phase coil set and the third-phase coil set at intervals. By the adoption of the technical scheme, the method has the advantages that the number of the windings is reduced, the ideal sine wave distributed magnetic exciting coil can be generated, the vibration of the motor is reduced effectively, the noise of the motor is lowered effectively, the motor operates stably, and the motor is easy to manufacture at the same time.