128results about How to "Accurate speed regulation" patented technology

The invention discloses a comprehensive test stand for water-lubricated bearings for pumps. The comprehensive test stand comprises a driving transmission system, a main box, a bearing, a lubricating system, a loading system, a measuring system, a signal analyzing and processing system and the like, the driving transmission system consists of a variable-frequency motor, an elastic coupler, a step-up box and the like, the main box is a cube with a transparent top cover plate, and a spindle horizontally enters the box from a side wall, which is close to the end of the elastic coupler, of the main box. A pressure sensor, an eddy current sensor, a vibration acceleration sensor, a temperature sensor and the like are sequentially arranged and mounted on the spindle or around the spindle and used for acquiring displacement signals, rotation speed signals, phase signals, temperature signals, pressure signals, vibration signals and the like, and the sensed signals which are acquired by the various sensors in an online manner are transmitted to an upper computer to be processed, displayed and stored. The comprehensive test stand has the unique advantages of fine performance, high precision, low cost, environmental protection, zero pollution, friction reduction, energy conservation, noise and vibration reduction, fine fire resistance, easiness in maintenance and the like.

The invention relates to a double-motor self-adaptive speed pre-regulating multi-gear power coupling device and a control method thereof. The double-motor self-adaptive speed pre-regulating multi-gearpower coupling device comprises a main driving motor (8), a planetary line speed change device (100), an auxiliary motor (15), a vehicle transmission shaft (9) and a vehicle driving axle (10); the planetary line speed change device (100) comprises a planet gear mechanism and a double-way combining device (105); the planet gear mechanism comprises a planetary line sun gear (102), a planetary linegear ring (103), a planetary line planet carrier (108) and a planetary line shell (107); and the planetary line gear ring (103) is jointed with the planetary line shell (107) or a planet carrier output shaft (106) through the double-way combining device (105). Compared with the prior art, the double-motor self-adaptive speed pre-regulating multi-gear power coupling device has the advantages that running requirements of a pure electric bus can be satisfied, the rotation speed of the motor can be pre-regulated before the gear shifting process, self-adaptive speed regulation is realized to a certain degree, and the rotation speed relation is automatically regulated and matched according to gear shifting needs in any running state.

The invention discloses a rotor slippage complementary exciting permanent-magnetic brushless variable speed motor. A rotor of the motor is connected with a motor rotating shaft through a spline and can move along the axial direction; two groups of polarity-complementation exciting magnetic sources are arranged on the periphery of the rotor side by side, wherein one group is main flux source exciting bodies, and the other group is secondary flux source exciting bodies; the main and the secondary flux source exciting bodies are arranged with alternated polarities by permanent magnets with the same number respectively to form rings; the polarity distribution on the circumference of the secondary flux source exciting bodies is spaced by one polar distance from the polarity distribution on the circumference of the main flux source exciting bodies; a roller path disc is fixedly connected on the motor rotating shaft, and the roller path disc and a conical cavity at one end of the rotor form a wedge-shaped space; and a plurality of rollers for pushing the rotor to move along the axial direction by eccentric motion are arranged in the wedge-shaped space. In the invention, the rotor moves along the axial direction to reduce the flux so as to change the torque/rotational speed property of the motor and realize speed variation, which improves the mechanical property of the permanent-magnetic brushless variable speed motor per se, enlarges the full-power speed adjusting range of the motor, keeps the volume of the motor and saves the production cost.

A device and a method of fan speed regulation comprise: an electrical level conversion unit used for carrying out electrical level conversion on an input control signal, and a switch control unit used for controlling the power of the fan to switch-on or break according to the signal outputted by the electrical level conversion unit. The device and method are easy to realize, with low power consumption and low cost, and can achieve multiple rotating speed gears which can accurately regulate the speed and obtain good effect according to need.

The invention discloses a combined type straightening machine. The combined type straightening machine comprises at least three detachable straightening roll devices. Each straightening roll device is connected with a drive device. Every two adjacent straightening roll devices are movably connected and arranged in an up-down staggered mode. Plates or profiles are straightened by the straightening roll devices by penetrating through the straightening roll devices which are arranged in the up-down staggered mode. According to the combined type straightening machine, the straightening roll devices are movably connected and arranged in the up-down staggered mode, and compared with an existing straightening machine of a fixed structure, the roll number and the roll distance of the straightening machine can be changed by increasing or decreasing the number of the straightening roll devices according to needs without replacing the whole straightening machine. The weight of a machine frame of the straightening machine can be lowered, the size can be decreased, the rigidity can be improved, and the straightening technological requirement of the plates or profiles of different thicknesses can be met. Moreover, each straightening roll device is connected with the corresponding drive device, and the roll speed of each straightening roll device can be automatically adjusted, so that the plates or the profiles are better straightened.

A differential flux motor includes a rotor and a stator assembly. The rotor has a shaft and rotor section(s) attached to the shaft. The stator assembly has first and second stator cores, first and second magnets, and a shell. The first stator core includes a first winding and concentrically surrounds at least a portion of the rotor. The second stator core has a second winding and concentrically surrounds at least a different portion of the rotor. The first magnet concentrically surrounds at least part of the first stator core, and the second magnet concentrically surrounds at least part of the second stator core. The first and second magnets are formed from permanent magnet material and have opposite polarities. The shell concentrically surrounds at least part of each of the first magnet and the second magnet. A method of manufacturing a differential flux motor is also provided.

The invention discloses a telescopic follow-up control method and a system of a suspension arm. The method comprises the steps of: detecting whether the position of a latch pin mechanism is located in a high speed moving region or a low speed moving region when a telescopic oil cylinder drives the latch pin mechanism to move; obtaining the high speed moving speed required by the latch pin mechanism in the high speed moving region, and obtaining the low speed moving speed required by the latch pin mechanism in the low speed moving region; calculating a matched rotating speed N required for driving the engine of the telescopic oil cylinder according to the high speed moving speed or the low speed moving speed of the latch pin mechanism; and setting the matched rotating speed N as the current rotating speed of the engine. According to the embodiment of the invention, the matched rotating speed N required for driving the engine is calculated according to the moving speed of the latch pin mechanism and the rotating speed of the engine is intelligently and accurately adjusted to be the matched rotating speed N, so that the rotating speed of the engine is matched with the expansion speed of the latch pin mechanism, thereby avoiding the risk factors caused by manual operation errors and improving the working efficiency.

The invention discloses a reliable and efficient carrying mechanical arm used for a wafer cassette. The wafer cassette comprises a cassette body and a handle, the handle is roughly in a U shape in an overlooked manner, the mechanical arm comprises a paw, a positioning sensor and a locking mechanism, the paw is roughly in a J shape in a side-looking manner, the positioning sensor is arranged on the side of a non-bending hook of the paw and is communicated with a carrying controller, the locking mechanism comprises a locking block, a locking drive unit and a locking controller, the locking block is arranged on one side of a bending hook of the paw, the locking drive unit drives the locking block to vertically move, and the locking block ascends to enable the lower end of the locking block to be away from the bending hook free end of the paw or descends to enable the lower end of the locking block to abut against the bending hook free end of the paw. The mechanical arm is small in size and compact in structure and has the vision identifying and sensing detection function, and a material locking mechanism is arranged on a mechanical structure. It is ensured that the mechanical arm can accurately and reliably grab the wafer cassette, in the carrying process, the wafer cassette can be prevented from sliding off, and efficient and reliable work is achieved.

The wind energy hydraulic power varying generator is one wind force power generator to convert wind energy into hydraulic energy to drive great power generator to produce electric power. The structural principle of the present invention is that the kinetic energy of several wind wheels are combined and converted into hydraulic energy mechanically, and the hydraulic energy is integrated into one powerful hydraulic transmission mechanism and used in driving one great power generator. The present invention has computer control to regulate hydraulic transmission and to stabilize rotation speed, and generator with varying power to output voltage. The present invention has simple structure, easy manufacture, low cost and great electrical power.

The invention discloses a rotor, a motor and a household appliance. The rotor comprises a rotating shaft, an iron core, an end ring, a magnet and a shielding part. The iron core is wound on the peripheral wall of the rotating shaft, the end ring is located at one end of the iron core in the axial direction of the rotating shaft, and a groove is formed in the end, away from the iron core, of the end ring. The magnet is mounted in the groove; the shielding part is made of a magnetic conductive material, the shielding part is installed in the groove and located on the side, facing the iron core, of the magnet, and due to the fact that the magnetic conductivity of the shielding part is far larger than that of air, more magnetic lines, penetrating through the groove, of a rotor magnetic field can pass through the shielding part to form a closed loop. Therefore, the influence of the rotor magnetic field on the magnetic field of the magnet is reduced, the interference of harmonic waves on the magnetic field induction device is reduced, the detection precision of the magnetic field induction device on the magnetic field of the magnet is improved, and the speed regulation precision of the motor is improved.

The invention discloses explosive loading equipment and an explosive loading method of emulsion explosive. The explosive loading equipment of the emulsion explosive is a multi-branch emulsion explosive film explosive loading machine which comprises a conveying pump, the downstream of the conveying pump is connected with a multi-path conveying pipeline, each path conveying pipeline is respectively connected with an explosive loading mechanism branch, a switching valve is respectively arranged on each branch, coil making machines, opening sealing machines and coil conveying mechanisms are arranged at the downstream of the switching valve, the emulsion explosive is conveyed by a pump through a plurality of branches, the branches are respectively provided with the coil making machines, the coil making machines continuously make coils and are matched with the conveying pump for sending a plurality of explosive coils in one step, the opening sealing machines are used for sealing openings and cutting off the explosive coils, and finally, the coil conveying mechanisms are used for conveying a plurality of explosive coils to a subsequent work procedure. The invention adopts a multi-branch and multi-station continuous conveying method for realizing large-production-capacity explosive loading.

A velocity meter verification system belongs to the technical field of data acquisition. The invention especially relates to a velocity meter verification system. The invention provides a velocity meter verification system which has the advantages of high running efficiency and fast dynamic response. The velocity meter verification system comprises a rectifier circuit, a capacitor filter part, an inverter, a PWM control part, a synchronous motor, a verification vehicle, and a weighing part. The velocity meter verification system is structurally characterized in that the rectifier circuit, the capacitor filter part, the inverter, the PWM control part, the synchronous motor and the verification vehicle are connected in sequence; the PWM control part is connected with the inverter, and the weighing part is connected with the verification vehicle; and an inverting circuit converts constant-frequency and constant-voltage alternating-current power into three-phase bridge voltage-regulated alternating-current power, the synchronous motor is driven by the output of the inverting circuit to rotate at different speeds, a running flow circuit of the verification vehicle in velocity meter equipment converts the alternating-current power into direct-current power under control, and after capacitor filtering, the inverter inverts the direct-current power into different frequencies.

The invention relates to a drying method of a stirring motor in the flocculation treatment process. When the washing machine executes a flocculation program, the motor drives the stirring mechanism to work, and a stirring mechanism rotating speed V is detected; when a detection value V is smaller than a set value Vi, the motor is adjusted to increase the stirring mechanism rotating speed; when the detection value V is smaller than the set value Vi, the motor is adjusted to reduce the stirring mechanism rotating speed. Through the control method, input power and the like of the motor can be subjected to controllable adjustment so as to achieve precise control over the stirring mechanism rotating speed and the purpose of improving flocculation reaction efficiency. The invention further relates to a flocculation washing machine applied to stirring motor driving method. The flocculation washing machine achieves precise control over the flocculation process and precise judgment of the flocculation washing machine fault so as to avoid backflow conditions of sub-standard flocculation water from generating. Meanwhile, the flocculation washing machine is simple in structure, the method is brief, the effect is remarkable, and the flocculation washing machine is suitable for application and popularization.

The invention relates to a gumming machine for a belt pulley scrubbing ring. The gumming machine is characterized by comprising a rack (1), wherein a control cabinet (17), two uprights (3), a motor (19), a gum material barrel (10) and a starting switch (16) are respectively connected onto the rack; linear sliding rails (24) and fixed plates (5) are connected onto the uprights by means of horizontal regulating bases, connecting plates (26) and air cylinders (6) which are mutually connected are arranged on the linear sliding rails and the fixed plates, the connecting plates are connected with dispensing valves (7), a single-line gum discharging pipe (8) and a dual-line gum discharging pipe (9) are respectively connected onto the two dispensing valves; an output shaft of the motor is connected with a rotary tray (20) where the single-line gum discharging pipe and the dual-line gum discharging pipe are correspondingly matched. The gumming machine has the advantages that gum application is controlled by virtue of the air cylinder and the motor, so that the automation, one-touch operation and uniformity and consistency of coated gum layers of the gum application are realized, the convenience is brought for the operation, the gum applying speed is high and the efficiency is high.

The invention relates to a heavy duty vehicle AMT engine and clutch self-adaption coordination control method. The heavy duty vehicle AMT engine and clutch self-adaption coordination control method comprises the following steps of firstly, the Roll off stage, wherein an engine is subjected to torque decreasing before a gear is disengaged, and then a clutch is controlled to be opened; secondly, theSpeed Contral stage, wherein the engine is subjected to speed regulation to the target rotating speed; and thirdly, the Roll On stage, wherein the clutch is engaged, after the rotating speed of the engine and the rotating speed of the clutch are synchronized, the torque of the engine is restored. The design can adaptively learn the clutch separation time and ensure the vehicle smoothness and thedynamic property.

The invention discloses a novel material color master batch washing, weighing and drying machine. The novel material color master batch washing, weighing and drying machine comprises a fixing bottom board; a drying barrel body is arranged on the top of a drying barrel fixing board; a heating board and a discharging outlet are formed inside the drying barrel body; a conveying motor is arranged at one end of a conveying pipe; a washing barrel body is arranged on the top of the conveying pipe; a pressure water inlet pipe and a washing motor are arranged on the top of the washing barrel body; a pressure water outlet is formed inside the washing barrel body; a washing motor shaft is arranged at the bottom of the washing motor; a water pulling piece is arranged at one end of the washing motor shaft; a weighing barrel base is arranged at one end of a pushing pipe; a weighing board is arranged on the top of the weighing barrel base; a weighing barrel is arranged on the top of the weighing board; and a weighing rotary shaft and a weighing rotary board are arranged inside the weighing barrel base. Therefore, the novel material color master batch washing, weighing and drying machine achievesthe purposes of full-automatic integration, accurate weighing, thorough washing and short drying time through the powerful weighing barrel, the washing barrel body and the drying barrel body.

In a vehicle's driveline, the clutch between drive engine and gearbox has the task of ensuring a final speed adjustment between the engine and the gearbox at the time when the clutch pedal is allowed to rise on completion of a gear change. The invention has the object of reducing the stress on the clutch and the disadvantages which arise from a lengthy sliding-in process with large speed differences. This is achieved by adjusting the engine speed to the gear being engaged, so that only a small speed difference has to be absorbed in the clutch.

The invention provides an impeller-type aerator for aquaculture. The impeller-type aerator includes a motor controller protection hood, a support rod device, a brushless direct-current motor, supportrods, buoys and an impeller; the support rod device is mounted at the upper end of the brushless direct-current motor, the motor controller protection hood is mounted at the upper end of the support rod device, the support rods are assembled on the support rod device, the buoys are arranged at the outer ends of the support rods, and the impeller is assembled under the brushless direct-current motor. According to the impeller-type aerator for the aquaculture, the motor controller protection hood is used for waterproof protection, the support rod device is subjected to waterproof protection, andthe design improves the overall stability of the impeller-type aerator; the impeller-type aerator is easy to operate, convenient to mount and good in stability, the function of overload protection isachieved, the magnitude of currents is convenient to detect.

The invention discloses an electromechanical switching control mechanism of a double-pulse speed governor. The mechanism is used for automatically switching the electronic control of the speed governor to mechanical control when the electronic control part breaks down. Under the normal circumstance, the control current of electromagnet in an actuating mechanism is increased when an diesel engine load is increased and speed is lowered; a control valve moves downwards to cause high-pressure oil to flow below a servo piston; the left end of a switching lever is connected with a reset piston by ahinge pin to move downwards to cause the main control valve to move downwards; and therefore, a power piston moves downwards and fuel is added so as to drive an output shaft to rotate towards fuel adding direction to improve regulation speed. When the electronic control part of the speed governor loses effect after failing and the revolving speed of the diesel engine is lowered to be lower than 5% of the normal speed set by the speed governor, the switching lever and a slide valve are completely separated without contacting; at the time, a high-response electromagnetism servo mechanism does not take effect; and the revolving speed of the diesel engine is controlled by the mechanical part of the speed governor.

The invention discloses a torque ripple rejection controller of a bearingless permanent magnet synchronous motor and a construction method of the torque ripple rejection controller. Through a torque controller, a suspension force controller, a current sensor, an optical-electricity encoder and eddy current displacement sensors, the torque ripple rejection controller in the torque controller is modulated by a first PID (proportion integration differentiation) regulator to obtain an initial proportion value kc, is processed by a second amplitude limiting module to obtain a proportion value k andis modulated by a first PI (proportional integral) regulator to obtain a rotor resultant current instruction value is*, the rotor resultant current instruction value is* is input into a current calculation module to obtain an initial direct-axis current instruction value iMdc* and an initial quadrature-axis current instruction value iMq*, the initial direct-axis current instruction value iMdc* isprocessed by a first amplitude limiting module to obtain a direct-axis current instruction value iMd*, and the proportion value k and the direct-axis current instruction value iMd* are input into a judging module to realize controlling of magnetism increasing and voltage regulation. The torque ripple rejection controller has the advantages that torque ripples of the motor can be rejected, precisespeed regulation of the bearingless permanent magnet synchronous motor can be realized, the influence of motor load effect on suspension stability is weakened, and working performances of the bearingless permanent magnet synchronous motor in high-speed and superhigh-speed operation states are improved.