56results about How to "Expand the operating area" patented technology

The invention relates to an improved-overmodulation based method for improving the alternating current motor torque output capacity. The method comprises: a current PI regulator outputting voltage vectors Ud and Uq of d and q axes according to id*, iq*, id, and iq; when the alternating current motor is operating in a non-weak magnetic region, obtaining voltage vectors Ualpha and Ubeta of alpha and beta axes by performing coordinate transformation on Ud and Uq; when the alternating current motor is operating in a weak magnetic region, obtaining optimized voltage vectors Udn and Uqn of the d and q axes by applying a voltage optimization method to Ud and Uq, and obtaining Ualpha and Ubeta by performing coordinate transformation on Udn and Uqn; setting different modulation regions according to the magnitude of Ualpha and Ubeta, and outputting corrected voltage vectors Ud* and Uq* of the d and q axes according to Ualpha and Ubeta; and finally, performing spatial voltage vector modulation to generate a switch action signal for on/off control of an IGBT in an inverter. Compared with the prior art, the method of the invention has the advantages that the bus voltage is high in utilization rate, the increase of output torque is large, and the current response is quick.

The invention relates to an optical generator for providing different combustion modes during combusting different fuels in different combustion chambers. The optical generator is characterized in that an elongated cylinder (302), an elongated cylinder sleeve (303), an elongated piston (203) and a circular gasket (101) are additionally mounted between an original cylinder (305) and a cylinder cover (301), a valve timing mechanism (308) is assembled on the cylinder cover (301), a circular aluminum alloy briquetting (201) and a transparent combustion chamber window (202) are mounted at the upper part of the elongated piston (203), a reflector (304) at 45 degrees with the axis of the piston is obliquely arranged at the lower part of the elongated piston (203), an angle scaler (5) is arranged on a generator crankshaft (307), an air cylinder pressure quartz sensor (7) is assembled on the cylinder cover (301), and a valve lift-range inductor sensor (9) is mounted on the valve timing mechanism (308).

The invention discloses a deburring device for an aluminum alloy wheel hub, which comprises a machine body, a hydraulic cylinder is arranged in the middle of the top of the body, a support seat is fixedly connected to the bottom of the body, and a workbench is arranged in the middle of the body. The invention achieves the purpose of removing the burrs on the upper and lower edges of the workpiece by setting the hydraulic cylinder, the first motor, the support rod and the first slide rail, and solves the problem of incomplete removal of the burrs on the workpiece. , a rotating rod and a rotating table solve the problem of low efficiency of the existing deburring equipment. By setting anti-slip lines on the bottom surfaces of the four support seats, the situation of equipment sliding during use is avoided. A debris collection tank is set up on the side to avoid potential safety hazards caused by the accumulation of debris on the workbench. By fixing the second motor on the second motor fixing frame, the stability of the second motor is effectively improved and the stable operation of the equipment is ensured. .

Disclosed is a continuously variable transmission that expands the operating range over which belt-slip control is allowed, while maintaining the estimated precision of the belt-slip state. This reduces belt friction, thereby reducing the drive energy used. A belt (44) is wrapped around a primary pulley (42) and a secondary pulley (43), and a secondary hydraulic pressure is controlled to produce a belt clamping force in accordance with input torque from an engine (1). The disclosed belt-type continuously variable transmission for a vehicle is provided with a belt-slip control means (fig. 8) and an input-torque change-rate limitation means (step S23 in fig. 12). When the rate of change of the input torque is less than a given value, the belt-slip control means controls the secondary hydraulic pressure on the basis of a phase difference (?) between a vibration component due to oscillation in the actual secondary hydraulic pressure and a vibration component due to oscillation in an actual gear ratio. The input-torque change-rate limitation means uses prescribed acceleration limitation allowance conditions to determine whether or not the acceleration of the vehicle may be limited (steps S21, S22, and S26 in fig. 12), and if so, limits the input-torque change rate to less than the aforementioned given value.

The invention relates to the field of furniture manufacturing, and particularly relates to a multi-position cutting device for furniture manufacturing. The multi-position cutting device comprises a horizontally-arranged fixed mounting plate, wherein supporting mounting plates are symmetrically arranged at the two ends of the upper side of the fixed mounting plate; the supporting mounting plates are vertically arranged; a movable guide column is horizontally arranged between the upper ends of the supporting mounting plates; guide mounting frames are longitudinally arranged on the supporting mounting plates right opposite to the two ends of the movable guide column; a guide mounting cylinder is arranged on the outer side of the movable guide column in a matched mode; and steering motors arevertically arranged in the middle of the lower end of the guide mounting cylinder. Through a guide moving structure, an operation structure of the device can efficiently move horizontally, and the operation area is remarkably improved; meanwhile, a rotary lifting structure is matched, so that the cutting angle and the station are increased, and the operation efficiency and quality are improved; and chippings are collected and guided out, so that the operation surface is clean and tidy, the moving efficiency of plates is improved, and the machining efficiency is further improved.

The invention discloses a multidirectional fruit picking and collecting integrated device. The device comprises a base, a crawler mechanism, a picking mechanism and a collection mechanism, wherein a rack is arranged on the rack, the picking mechanism is arranged on the rack, a lifting driving mechanism drives the picking mechanism to rise and fall, the picking mechanism comprises a mounting plateand two picking arms arranged on the mounting plate symmetrically laterally, each picking arm comprises a supporting rod, a first stretching arm, a second stretching arm, a rotating picker, a low-siteair cylinder and a high-site air cylinder, the supporting rods are rotationally arranged on the mounting plate, and each rotating picker is arranged at the top end of the corresponding second stretching arm; and the collection mechanism comprises a top end collection net, a sideway collection net and a collection frame. Compared with the prior art, the multidirectional fruit picking and collecting integrated device has the advantages that fruits of multiple heights, multiple angles and different positions can be picked up, high-angle rotation can be carried out on the two picking arms, a picking working area is greatly expanded, and a collection device is integrated with a picking device.

Provided is a novel notebook computer comprising a first body, the screen unit is mounted above the first body in an elastic turnover manner; the second body is pivotally mounted on one side of the first body through a first rotating shaft; the third body is pivotally mounted on the other side of the first body through a second rotating shaft; the screen unit is overlapped on the first body through the locking part; wherein the second body and the third body are respectively overlapped above the screen unit, a driving part is arranged on the second body and/or the third body, and when the second body and the third body are turned over and opened, the driving part acts on the locking part so as to enable the screen unit to be elastically turned over from the first body. The scheme is novelin structure, can be divided into a working mode and a cinema mode, and can be freely switched; The structure is relatively open, and the main board can be designed at places where the left and rightswing covers are not commonly used to easily dissipate heat; And when the computer is turned off, the interface is relatively closed to reduce dust entering the machine.

The invention discloses a mobile-communication networking method and a mobile-communication networking system. The mobile-communication networking method comprises the following steps: acquiring data packages generated by base-station equipment or uplink transmitted by first terminal equipment residing in the current sub-network; judging the target equipment of the data packages whether belongs to the current sub-network or not,if not, then transmitting the data packages until the data packages are authenticated and accessed to the trunk equipment of the current sub-network so that the trunk equipment downlink transmits the data packages to the target equipment through the adjoining second sub-network operating authentication and access with the trunk equipment at the same time. The mobile-communication networking method can effectively improve the communication efficiency of the terminal equipment of the networking system.

The invention relates to an angle-adjustable spraying and dust-settling device for a coal mine. The angle-adjustable spraying and dust-settling device comprises a bottom plate, rolling wheels rotationally installed at the bottom of the bottom plate, a water tank arranged on the bottom plate, a water pump arranged on the water tank, a hose arranged on a water outlet of the water pump, a first explosion-proof motor fixedly installed on the upper surface of the bottom plate and a positioning rod vertically installed on the first explosion-proof motor, wherein a water inlet pipe of the water pump extends into the water tank, the output end of the first explosion-proof motor faces upwards and is coaxially provided with a threaded rod, the threaded rod is in threaded fit with a horizontally-arranged moving table, and the hose extends to be supported above the moving table and a movable arm and is connected with the movable arm. According to the angle-adjustable spraying and dust-settling device for the coal mine, the movable table is driven by the first explosion-proof motor to reciprocate up and down along the threaded rod so as to adjust the height of an atomizing cover connected with the hose, and the movable arm is driven by a second explosion-proof motor to swing back and forth in a transverse sector type mode so as to enlarge the spraying operation area of the atomizing cover.

The invention relates to a method for designing a stabilizer of an uncertain power system based on interval time lag influence, which comprises the following steps of: constructing a new augmentationvector and a multiple integral LyapunovKrasovskii functional, then introducing a double Wirtinger inequality to estimate a functional derivative on the basis of a single Wirtinger integral inequality,and adopting a convex combination method, so that a system robustness stability criterion with lower conservative property is obtained. On the basis, a memory-free and memory feedback controller of the system is designed, and a step linearization method is applied to obtain a stabilizer existence condition based on a strict linear matrix inequality. Finally, simulation analysis verifies that themethod provided by the invention effectively enlarges the stable operation region of the power system, and the designed controller has better control performance.

The invention discloses an automatic intelligent grease sprayer, and belongs to the field of rail maintenance devices. The automatic intelligent grease sprayer is used for maintaining rail station plugs, and comprises a frame base, wherein an oil inlet of a plunger pump is connected with a grease tank, an oil outlet of the plunger pump is connected with at least one grease nozzle, and power is provided for the plunger pump through a pump driving mechanism; and a control system comprises a controller and a sensor, the sensor is arranged at a position for sensing a station plug on the frame base and is connected with the controller through a lead in a way of electric signals, and the controller is also connected with a travelling mechanism assembly and a control device in the pump driving mechanism through leads in a way of electric signals. The automatic intelligent grease sprayer can achieve precise spraying at station plug positions of a steel rail, is simple in structure, high in working efficiency and strong in stability, does not need doping of machine oil, and can spray long-acting grease; and the anticorrosion time of station plugs is long, so that the steel rail maintenance cost is reduced.