59 results about "Adjustable-speed drive" patented technology

The invention belongs to the technical field of integrated circuits, and particularly relates to a speed regulation driving and anomaly detection circuit of a cooling fan. Comprising a current expansion driving module for providing a voltage FCC stabilized by an LDO for a fan and performing current expansion on an output current of the LDO to drive the fan; the logic control module is connected with the current expansion driving module and is used for adjusting a control signal ADJlt; n: 0gt; the value of the voltage FCC output by the LDO is changed, so that the speed of the fan is regulated; and the sampling detection module is connected with the logic control module and the VIN port of the LDO, samples the current of the fan through a sampling resistor, converts the current into a voltage V0, compares the voltage V0 with a reference voltage Vref, and outputs a voltage signal to the level shift circuit. The speed-adjustable fan driving circuit is integrated, detection of various abnormal states of the fan is achieved, and the speed-adjustable fan driving circuit has the outstanding advantages of being simple in PCB layout and low in cost.

A pumping system includes a plurality of interconnected integrated motor / pump modules (IMPs) submerged in a process liquid, such as liquid hydrogen (LH2), within a container, the IMPs being separately controlled by adjustable speed drives (ASDs). The rotation speeds of the IMP impellers are controlled such that the NPSH_A for each IMP remains above a minimum, critical suction head NPSH_c of the IMP, while the outlet pressure and flow of the last IMP is maintained at a specified level unless its NPSH_A falls substantially to its NPSH_c, or until the container is substantially empty. The IMPs can be identical, initially operating at the same speeds, or the first IMP can be an inducer IMP having a reduced NPSH_c. The IMPs can comprise permanent magnets or induction coils attached to their impellers that pass in proximate radial or axial alignment with stator coils. The ASDs can be variable frequency drives (VFDs).

The utility model discloses an improved high-pressure cleaning machine, and relates to the technical field of cleaning machines, the improved high-pressure cleaning machine comprises a high-pressure plunger pump, a driver, a potentiometer and a permanent magnet brushless motor, the high-pressure plunger pump is respectively connected with a water source and a high-pressure water gun, and the high-pressure water gun sprays high-pressure water after the water source passes through the high-pressure plunger pump; the permanent magnet brushless motor comprises a motor body, a stator mechanism and a rotor mechanism with a Hall sensor, the stator mechanism is arranged on the motor body, a rotor comprises a main shaft, a rotor core arranged on the main shaft and a permanent magnet inserted into the rotor core, and the rotor is matched with a stator; the main shaft is connected to the high-pressure plunger pump, and the driver is electrically connected with the permanent magnet brushless motor and the potentiometer. And the driver performs speed regulation driving control on the permanent magnet brushless motor according to the output resistance value of the potentiometer. A permanent magnet brushless motor and a driver are adopted, and wide-range speed regulation control is performed on the rotating speed of the permanent magnet brushless motor by controlling the output of a potentiometer, so that the wide-range ejection speed of water flow of the high-pressure water gun is controlled.

The invention discloses an inductor coil test fixture, which belongs to the technical field of inductor coil detection. The invention comprises a first anti-dumping metal plate, a deformable transport mechanism is arranged above the first anti-dumping metal plate, an adjustable speed driving mechanism is arranged on the upper surface of the first anti-dumping metal plate for supporting, driving and adjusting the posture of the deformable transport mechanism, a feeding detection mechanism is arranged above the adjustable speed driving mechanism for cooperating with the deformable transport mechanism and the adjustable speed driving mechanism to feed and detect the inductor coil, and a second anti-dumping metal plate for supporting the feeding detection mechanism is arranged at one end of the upper surface of the first anti-dumping metal plate; automatic loading, unloading and detection of the test fixture are realized through the mutual cooperation of multiple structures, and the staff does not need to manually load and unload the materials in a time-consuming and laborious manner, thereby reducing unnecessary time consumption and significantly improving the detection efficiency of the test fixture.

A submersible well fluid system for operating submerged in a body of water may include an electric machine and a fluid end. The electric machine includes a rotor and a stator residing in a first housing at specified conditions. The fluid end may include an impeller and be coupled to the electric machine. The submersible well fluid system may also include an adjustable speed drive for the electric machine in the housing. The submersible well fluid system may also include a chemical distribution system for supplying treatment chemicals to the submersible well fluid system, a barrier fluid supply system for supplying a barrier fluid to the submersible well fluid system, and a pressure management system.

The utility model relates to a tunnel ventilation equipment technical field, concretely is an intelligent tunnel ventilation control system based on stepless speed regulation technology. Include: wind speed sensor for real -time monitoring the wind speed in the tunnel, main control unit for receiving the data of wind speed sensor, calculates the fan speed regulation amount, and generates control instruction, stepless speed regulation drive module is connected with main control unit, realizes the smooth stepless regulation of fan blade rotating speed through the adjustment fan input voltage or frequency, feedback module is used for real -time monitoring the actual rotating speed and operating condition of fan, and the data is fed back to main control unit, forms closed -loop control, communication module, communication module connects feedback module, is used for realizing remote control and data interaction, storage module is used for storing wind speed, rotating speed and control instruction historical data, user interface is used for providing operation interface, and the user sets target wind speed through touch -sensitive screen or remote control equipment.

The present invention is directed at a method for evaluating the degradation level of capacitors of a power filter connected to an adjustable speed drive (ASD) or a power converter. The invention is also directed at an adjustable speed drive and a power converter provided for performing the method.

The slender shaft grinding device comprises a centerless grinding machine, feeding platforms are arranged in the feeding direction and the discharging direction of the centerless grinding machine respectively, a plurality of sets of driving modules matched with one another are arranged on the feeding platforms, each driving module comprises two driving wheels, and the driving wheels are connected with the centerless grinding machine. The driving wheels are arranged on a support, the bottom of the support is fixed to the feeding platform through a transverse fine adjustment sliding table, the two driving wheels are both connected with a speed-adjustable driving motor, two coarse adjustment sliding tables are arranged at the bottom of the feeding platform, and the coarse adjustment sliding tables are connected with supporting legs through first lifting assemblies. The driving wheels can be conveniently replaced, the driving wheels are mutually independent, and the running stability is reliable.

The invention relates to the technical field of induced draft fan control systems, and discloses a low-speed stability control system of a large-diameter retroverted impeller induced draft fan, which is in communication connection with a speed regulation driver of the induced draft fan and is used for inhibiting a rotating stall phenomenon of the fan caused by airflow separation under a low-speed working condition. The system comprises the following cooperative work modules: a dynamic pressure sensing module, an intelligent feature analysis module, a multi-mode anti-instability control module and a system safety guarantee module. According to the low-speed stability control system of the large-diameter backward-inclined impeller induced draft fan, the system has good expansibility and maintainability through modular design. The four-layer structure is clear in division of labor and works cooperatively, so that the real-time performance of control is ensured, and the reliability of the system is improved. Compared with a traditional single control mode, according to the structure, the instability early warning time is advanced by 5-10 minutes, the control precision is improved by 40% or above, and the operation stability of the draught fan under the low-speed working condition is remarkably improved.

The utility model discloses a full-automatic carton packaging machine with an adjustable conveying belt, and relates to the technical field of carton packaging. The paper wrapping machine comprises a rack, a support is fixedly connected to the rear side of the rack, a first air cylinder is fixedly connected to the bottom of the support, and a paper wrapping machine is fixedly connected to the bottom of the first air cylinder. And a speed regulation driving transmission assembly is arranged at the top of the rack. The speed regulation driving transmission assembly is arranged and comprises the motor and the frequency converter, the conveying speed of the conveying belt can be adjusted according to actual production requirements, it is ensured that the conveying speed of cartons is matched with the scrap cleaning speed, the carton stacking phenomenon is avoided, and the production efficiency is improved; comprising a baffle, a vertical plate and a fan, a relatively sealed space can be formed in the carton conveying process, paper scraps are effectively prevented from flying around, the packaging operation environment is improved, and the cleaning workload is reduced.

The invention discloses a dual-power-driven refrigeration device and a construction method, the dual-power-driven refrigeration device comprises a small steam turbine, a clutch, a motor (asynchronous motor / generator) and a refrigeration compressor, the driving end of the small steam turbine is connected with the clutch, and the clutch is connected with the refrigeration compressor through the motor; a steam exhaust port of the small steam turbine is connected with an absorption heat pump unit, the small steam turbine is a back pressure type steam turbine and is connected with the clutch, and the motor is an asynchronous motor / generator. Gradient utilization of factory waste heat steam energy can be achieved, during normal work, waste heat steam enters the small steam turbine, electricity is generated by dragging the motor (used as a generator at the moment), and steam heat energy is converted into electric energy; meanwhile, the refrigeration compressor is driven through the hydraulic coupler (used for speed regulation), and compared with a traditional electric refrigeration compressor, electric energy consumption is effectively reduced; steam exhausted by the small steam turbine enters the absorption type heat pump unit, and complete utilization of waste heat steam is fully achieved. When the waste heat steam is interrupted, the steam turbine is separated from the clutch in the motor, the steam turbine stops working, and the motor (used as a motor at the moment) drags the refrigeration compressor to work through the hydraulic coupler (used for speed regulation).

The invention relates to the technical field of industrial automatic conveying systems, and discloses a conveying belt anti-blocking energy-saving control system and method based on multi-sensor collaboration.The conveying belt anti-blocking energy-saving control system comprises a conveying belt unit, a sensor unit, a speed-adjustable driver and a central controller, the conveying belt unit is composed of multiple stages of conveying belts which are sequentially connected, and the sensor unit is connected with the speed-adjustable driver; comprising a position sensor installed at the tail end of each belt, a counting sensor arranged at a system inlet or a key node, a speed-adjustable driver, a motor for driving each conveying belt and capable of receiving a speed control signal to adjust the speed, and a central controller comprises a core processing unit, a timer, a human-computer interaction interface and an alarm. Position sensor signals and the timer cooperate to judge material blockage, the belt speed is dynamically adjusted, energy saving is achieved, and the device is suitable for high-safety scenes such as civil explosions.

The invention discloses a drilling machine tool for mechanical parts, which belongs to the technical field of numerical control machine tools and comprises an anti-toppling mounting bottom plate, and a speed-adjustable anti-skid belt for conveying workpieces is arranged above the anti-toppling mounting bottom plate. A plurality of speed-adjustable driving rollers used for supporting and driving the speed-adjustable antiskid belt are arranged on the upper surface of the anti-toppling mounting bottom plate at intervals, and the speed-adjustable driving rollers are fixedly connected with the anti-toppling mounting bottom plate; a detachable dustproof top plate is arranged above the speed-adjustable antiskid belt; workpieces are automatically conveyed through the speed-adjustable anti-skid belt, high-precision automatic anti-skid fixing is conducted on the workpieces through the deformable fixing assembly, the drilling machine tool is more convenient to use, the machining precision of the drilling machine tool is higher, secondly, the posture of the workpieces can be adjusted, and the drilling machine tool is worthy of application and popularization.

A system includes: a speed adjustable driver (ASD) module, the module including an input, an output, and a plurality of ASDs in parallel, each ASD including: a rectifier electrically connected to the input of the ASD module; an inverter electrically connected to an output of the ASD module, the inverter comprising a plurality of controllable switches configured to switch at a switching frequency; and a direct current (DC) link electrically connected to the rectifier and the inverter; and a control system connected to the ASD module, the control system configured to compensate for the plurality of circulating currents.

A pumping system includes a plurality of interconnected integrated motor / pump modules (IMPs) submerged in a process liquid, such as liquid hydrogen (LH2), within a container, the IMPs being separately controlled by adjustable speed drives (ASDs). The rotation speeds of the IMP impellers are controlled such that the NPSH_A for each IMP remains above a minimum, critical suction head NPSH_c of the IMP, while the outlet pressure and flow of the last IMP is maintained at a specified level unless its NPSH_A falls substantially to its NPSH_c, or until the container is substantially empty. The IMPs can be identical, initially operating at the same speeds, or the first IMP can be an inducer IMP having a reduced NPSH_c. The IMPs can comprise permanent magnets or induction coils attached to their impellers that pass in proximate radial or axial alignment with stator coils. The ASDs can be variable frequency drives (VFDs).

The invention relates to a variable frequency motor air gap length optimization method and an electromagnetic design parameter determination method, and the method comprises the steps: firstly obtaining an air gap length theoretical optimal solution, which comprises the steps: building a binary relational expression between the total loss of a variable frequency motor and the air gap length, introducing a Newton-Raphson method, constructing an air gap length function, and constructing a Newton-Raphson formula; the method comprises the following steps: selecting operation efficiency, obtaining an initial air gap length by using an air gap length calculation formula of a common induction motor, substituting the initial air gap length into a Newton-Raphson formula to carry out iterative calculation to obtain a final value of the air gap length, calculating a power factor by using the obtained final value of the air gap length, and if the calculated power factor meets a design requirement, determining that the power factor is a power factor. The final value of the air gap length obtained by iteration is the theoretical optimal solution of the air gap length; and then, a whole set of relatively accurate electromagnetic design parameters is calculated based on an air gap length theory optimal solution, so that harmonic loss caused by an intelligent speed regulation driver is reduced, insulation damage is reduced, and the service life of the motor is prolonged.

The invention belongs to the technical field of permanent magnet speed regulators, and particularly relates to a permanent magnet speed regulation driving device for an energy-saving generator set, which comprises a casing, a driving end and a load end are arranged in the casing, and a permanent magnet a is arranged on the driving end; the driving part comprises a sliding frame, a bidirectional lead screw and a push block are arranged in the machine shell, and the push block is connected with the sliding frame; the emergency part comprises a sleeve b, a push plate and a permanent magnet b are arranged on the sleeve b, a limiting block is connected to the push plate, and a check block and a storage groove are arranged on the sleeve b; and the control part comprises a warning lamp, and an ejector rod is connected into the machine shell. The permanent magnets at the load end and the driving end can be driven to be close to or far away from each other at the same time, half of the moving process is reduced, the two sets of permanent magnets are automatically driven to be far away under the condition that the load end is stuck in an emergency, the driving part is prevented from independently bearing acting force, and after the condition is relieved, the control device rapidly returns to the normal state.

A system comprises: a module for an adjustable speed drive, an ASD module comprising an input, an output, and a plurality of parallel-connected ASDs, each ASD comprising: a rectifier electrically connected to the input of the ASD module; an inverter electrically connected to the output of the ASD module, the inverter comprising a plurality of controllable switches configured to switch at a switching frequency; and a DC link electrically connected to the rectifier and the inverter; and a control system coupled to the ASD module, the control system being configured to compensate for a plurality of circulating currents.

A pumping system includes a plurality of interconnected integrated motor / pump modules (IMPs) submerged in a process liquid, such as liquid hydrogen (LH2), within a container, the IMPs being separately controlled by adjustable speed drives (ASDs). The rotation speeds of the IMP impellers are controlled such that the NPSH_A for each IMP remains above a minimum, critical suction head NPSH_c of the IMP, while the outlet pressure and flow of the last IMP is maintained at a specified level unless its NPSH_A falls substantially to its NPSH_c, or until the container is substantially empty. The IMPs can be identical, initially operating at the same speeds, or the first IMP can be an inducer IMP having a reduced NPSH_c. The IMPs can comprise permanent magnets or induction coils attached to their impellers that pass in proximate radial or axial alignment with stator coils. The ASDs can be variable frequency drives (VFDs).

The utility model discloses a direct current motor speed regulation driving circuit, which belongs to the technical field of direct current motor driving, and is characterized in that a square wave pulse signal output end MOTO of an MCU (Microprogrammed Control Unit) is electrically connected with an input end of a secondary MOS (Metal Oxide Semiconductor) amplification module, an output end of the secondary MOS amplification module is electrically connected with a G pole of a high-power N-channel MOS tube Q3, an S pole of the high-power N-channel MOS tube Q3 is grounded, and an output end of the high-power N-channel MOS tube Q3 is electrically connected with an output end of a secondary MOS amplification module. The D pole of the high-power N-channel MOS tube Q3 is electrically connected with a direct-current motor port MOTON, the direct-current motor port MOTON is electrically connected with a direct-current motor port MOTOP through a capacitor C5, the direct-current motor port MOTON is further electrically connected with the first end of a capacitor C6, the second end of the capacitor C6 is grounded, and the direct-current motor port MOTOP is electrically connected with a power module. The direct current motor speed regulation driving circuit solves the problem that the existing motor driving circuit adopts two MOS tubes, so that power equalization is difficult to realize.

The application discloses a device control method and related device, and the method comprises the following steps: acquiring a first rotating speed value and a first three-phase current measurement value of an induction motor; determining a first rotor flux linkage value according to the first three-phase current measurement value; determining a first rotating speed difference value between a preset rotating speed reference value and the first rotating speed value; determining a flux linkage reference value corresponding to the first rotating speed value; determining a first flux linkage difference value between the flux linkage reference value and the first rotor flux linkage value; inputting the first rotating speed difference value and the first flux linkage difference value into a first and a second fuzzy PI controller respectively to obtain an electromagnetic torque reference value and a flux linkage current reference value; determining a three-phase current reference value based on the electromagnetic torque reference value, the flux linkage current reference value and the first rotor flux linkage value; determining a control signal according to the first three-phase current measurement value and the three-phase current reference value; and suppressing the rapid drop of the rotating speed of the induction motor by using the control signal. By adopting the embodiment of the application, the voltage sag tolerance of the adjustable speed driver is improved.

The utility model discloses a gearbox and a rhizome medicinal material harvester with variable angle and rotating speed, and the gearbox comprises a box body, an input shaft, a transmission shaft, an intermediate shaft, a speed regulation shaft, a first output shaft, a second variable speed output shaft and a speed regulation drive; the medicinal material harvester comprises a medicine digging shovel, a main rack, a middle rack and a tail rack. The medicinal material harvester has the advantages that the angles of the middle rack and the tail rack of the medicinal material harvester are adjustable, the inclination angle of the mesh belt conveyor is adjustable, and the purpose of adjusting the screening efficiency is further achieved. In a word, the medicine digging shovel of the medicinal material harvester can realize vibration medicine digging, and the rotating speed and the inclination angle of the mesh belt type conveyor can be adjusted, so that the harvesting requirements of rhizome medicinal materials with different depths can be met, and the medicinal material harvesting rate can be improved.

The present disclosure provides a method for estimating capacitor degradation and a device performing the same. The present invention relates to a method for estimating a degree of degradation of a capacitor of a power filter connected with an adjustable speed drive (ASD) or a power converter. The present invention also relates to an adjustable speed drive and a power converter for performing the method.

The invention relates to the field of power electronic converter control, and discloses a high-power active variable inductor for a speed-adjustable driver and a control method thereof.The high-power active variable inductor comprises a positive inductor and a negative inductor, the positive inductor is a traditional physical inductor, and the negative inductor is obtained through equivalence of a single-phase inverter; by connecting the positive inductor and the negative inductor in parallel, the overall equivalent inductance value is increased, and meanwhile, a wider-range adjusting space is provided, so that a better filtering effect is achieved, the equivalent inductance value can be adjusted in a wide range, the power density is high, implementation is easy, three-phase imbalance can be dealt with, the electric energy quality of a speed-adjustable driver is improved, and the service life of a direct-current side filtering capacitor is prolonged; the problems that a direct-current side passive filter of an existing speed-adjustable driver is heavy, the inductance size of an active capacitor is difficult to reduce, and the adjusting range of an existing active inductor is narrow are effectively solved.

The invention discloses an in-situ sludge reduction device with a biological enzyme replacing a traditional carbon source, and relates to the technical field of sewage treatment, the in-situ sludge reduction device comprises a compound enzyme catalytic reaction kettle, an enzyme preparation storage and control box, a metering and adding module and a compound stirring reaction unit, the enzyme preparation storage and control box and a self-adaptive air pump are arranged on the compound enzyme catalytic reaction kettle, and the self-adaptive air pump is arranged on the self-adaptive air pump; the enzyme preparation storage control box comprises an intelligent process control terminal, an arc-shaped guide groove and a spiral propulsion roll shaft, a variable frequency motor drives the roll shaft to precisely feed enzyme, a composite stirring reaction unit is arranged in an inner tank, upper and lower bearing blocks are connected with four mounting plates through linkage rods and supporting rods to form a stirring frame, a high-speed shearing motor drives rotation, and a self-adaptive air pump adjusts lifting. A flexible bionic desilting scraper is arranged on the mounting plate and attached to the tank wall for desilting, the metering and adding module comprises a flow guide mixing barrel, a speed-adjustable driving machine drives a two-way material blocking attaching roller to conduct stable-pressure feeding, the materials are sprayed out through a jet flow nozzle after being accurately controlled by a metering valve, a traditional carbon source is replaced, the problems of poor mixing and inaccurate adding are solved, the decrement efficiency is improved, and the cost is reduced.

The utility model discloses a speed-adjustable driving mechanism of a permanent magnet ball mill, which relates to the technical field of ball mills and comprises a charging barrel, a driving component, a support component and a large gear ring, the large gear ring is fixedly mounted at one end of the charging barrel, and the driving component comprises a driving motor and a driving belt pulley. And the driving belt pulley is fixedly mounted at one end of the driving motor. Under the combined action of the driving belt pulley and the driven belt pulley, due to the sliding blocks and the sliding grooves in the driving belt pulley and the driven belt pulley, when the rotating speed of the ball mill needs to be adjusted, the fastening bolts are screwed off, the sliding blocks slide along the sliding grooves, and after the sliding blocks reach the needed positions, the fastening bolts are screwed down; the transmission ratio between the driving belt pulley and the driven belt pulley is changed by changing the diameter of the driving belt pulley and the driven belt pulley in contact with the transmission belt, so that the speed of the ball mill driving mechanism is adjustable.

The utility model relates to the technical field of glass product production, and aims to provide glass product production cooling equipment which comprises a bottom plate, a conveying assembly arranged on the bottom plate, a driving assembly arranged on the conveying assembly, a supporting assembly arranged below the bottom plate, a first cooling assembly arranged on the supporting assembly and a second cooling assembly arranged on the supporting assembly. The supporting assembly is provided with a temperature sensor, the temperature can be monitored in real time, cooling parameters can be adjusted in time, the cooling effect is guaranteed, and energy waste is avoided. The cooling assembly is matched with uniformly distributed cold air nozzles through a cold air pump, and cooling is uniform and efficient. And the conveying assembly is matched with the speed-adjustable driving motor, conveying is stable, the speed can be flexibly adjusted, and different production rhythms are adapted. The whole equipment effectively improves the cooling quality and the production efficiency of glass products, and reduces the reject ratio and the production cost of the products.

The utility model relates to the technical field of spraying, in particular to a conveying line for spraying floor spring components, which comprises a frame, a conveying mechanism, a hanging component and a rotating mechanism. The conveying mechanism comprises a circulating conveying chain mounted on the rack according to a conveying path, a plurality of hanging hole plates arranged on the circulating conveying chain at intervals, and a first speed regulation driving device mounted on the rack and used for driving the circulating conveying chain to operate; the hanging assembly comprises a connecting base used for being hung on the hanging hole plate, a movable frame rotationally connected with the connecting base and used for hanging the floor spring component and a chain wheel fixed to the movable frame. The rotating mechanism comprises a circulating rotating chain which is installed on the machine frame, arranged on one side of the circulating conveying chain and used for driving the chain wheel to rotate, and a second speed regulation driving device which is installed on the machine frame and used for driving the circulating rotating chain to operate. By means of the floor spring component spraying device, the conveying speed and the rotating speed of the floor spring component can be adjusted, and the spraying quality of the floor spring component is improved.

The invention discloses a high-strength bolt anti-seizure agent coating device and method, solves the problem of adaptability of anti-seizure agent coating of bolts with different diameters, improves the uniformity of anti-seizure agent coating, and improves the production speed of the bolts coated with the anti-seizure agent. According to the technical scheme, the device comprises a workbench, a rotary stock bin, a speed regulation driving motor and a rotary base; the rotating base is arranged on the working table, the rotating stock bin is arranged above the rotating base, and the speed regulation driving motor is arranged below the working table; the rotary stock bin is composed of a stock bin body, an inner winding type spring brush, a top cover and a driving shaft. The stock bin body is in a cylinder shape with a bottom, the inner winding type spring brush is arranged on the inner wall of the stock bin body and detachably connected with the inner wall of the stock bin body, the top cover is arranged above the stock bin body, the driving shaft is arranged on the lower portion of the stock bin body, and the inner winding type spring brush is detachably connected with the inner wall of the stock bin body. And the motor is connected with the speed regulation driving motor.