93results about How to "Solve the unstable operation" patented technology

The invention relates to a rotary speed adaptive robust control system and method for an ultra-high-speed permanent magnet synchronous motor. The method comprises the steps of determining a motor rotary speed estimated value and a motor rotary speed error value by adopting a sensorless rotary speed estimation algorithm; determining a corresponding control amount by adopting an adaptive robust rotary speed control algorithm; determining a stator flux, a torque feedback value, flux error and torque error through motor three-phase current and three-phase voltage; performing voltage vector selection to obtain a basic voltage control signal; determining rotor position information through the sensorless rotary speed estimation algorithm; obtaining a three-phase compensation voltage by adopting a dead region compensation algorithm; combining the basic voltage control signal output by a voltage vector selection module with the three-phase compensation voltage, and performing PWM control on the motor; and repeatedly carrying out the steps until the motor rotary speed achieves the index. According to the rotary speed adaptive robust control method, the rotary speed estimation algorithm, the adaptive robust speed control algorithm, and the dead region compensation algorithm are adopted, so that the rapid, stable and reliable rotary speed control of the ultra-high-speed permanent magnet synchronous motor is effectively realized.

The invention relates to a method for controlling flux, and relative device, wherein it comprises that: obtaining flux control parameter as system property data; comparing control parameter with preset range; controlling the sending speed of data pack via the compared result. The invention can reduce resource consumption and improve operation stability, to balance the processing ability and network bandwidth.

The invention provides an alkyl ester method produced glyphosate solvent recovery method. A diluted methanol solution collection tank is connected with the upper part of a primary rectifying tower through a pipeline, and the primary rectifying tower is connected with a return tank I through a condenser I; the return tank I is connected with a methyl alcohol methylal solution intermediate tank; themethyl alcohol methylal solution intermediate tank is connected with a secondary rectifying tank, a return tank II is connected to a methyl alcohol methylal finished product tank, and the secondary rectifying tank is connected to a methyl alcohol finished product tank. The recovery process comprises the following steps: enabling diluted methanol inside the diluted methanol solution collection tank to enter into the primary rectifying tower, enabling gas inside the primary rectifying tower to condense through the condenser to return back to the return tank, and feeding to the methyl alcohol methylal solution intermediate tank; feeding to the methyl alcohol finished product tank from a secondary rectifying tower extraction pump, condensing liquid at the bottom of the tower through the condenser and then feeding to the methyl alcohol finished product tank. According to the equipment and process provided by the invention, the defect that a traditional liquid-phase recovery process highlydepends on a graphite condenser and the problem that a traditional gas-phase recovery process is unstable in operation are solved, the process has the characteristics of energy saving and economical efficiency, and the steam consumption of glyphosate is 1.2t.

The invention discloses a detecting device of storage tank soleplate, which comprises a permanent magnetic adsorption mechanism comprising an armature and two permanent magnet groups respectively arranged on one end of the armature and adsorbed on a storage tank soleplate to be detected, and the permanent magnet groups are wrapped by a sealing cover; a detecting probe seat arranged on the armature between the two permanent magnet groups of the permanent magnetic adsorption mechanism for mounting a probe and a detecting soleplate, and the detecting probe seat is provided with a sealing structure for providing sealing protection to a probe circuit; a steering mechanism connected with one end of the permanent magnetic adsorption mechanism, and a movable sealing element is installed thereon for steering the detecting device; a driving mechanism connected with the steering mechanism for driving the detecting device to move; a driven wheel set arranged on the other end of the permanent magnetic adsorption mechanism, and the driven wheel set is driven by the driving mechanism to move with the detecting device. The device of the invention has static and movable sealing structures, and the device can be used for detecting the defects of oil storage tank soleplates by carrying different categories of sensors so as to avoid the defects of the common detecting methods.

The invention discloses a positioning device and a positioning method for a drowning person. The device comprises a shell made from a nonconductive material, a GPS (global positioning system) positioning device, a microprocessor, a memory, a Beidou positioning unit, a Beidou communication unit, a rechargeable battery for supplying power, a power switch, a key, a display screen and a drowning switch, wherein the GPS positioning device, the microprocessor, the memory, the Beidou positioning unit, the Beidou communication unit and the rechargeable battery are arranged in the shell; the power switch, the key, the display screen and the drowning switch are arranged on the shell; the microprocessor is electrically connected with the Beidou positioning unit, the Beidou communication unit, the GPS positioning device, the power switch, the display screen, the key and the memory respectively; the drowning switch comprises two metal sheets which are arranged on the rear surface of the shell at an interval of more than 4cm; one metal sheet is grounded, and the other metal sheet is electrically connected with the microprocessor. The device and the method have the characteristics of capability of quickly positioning the drowning person, determining the current state of the drowning person, knowing information about the drowning person in detail, bringing convenience to the rescue planning of a rescue department and improving the rescue efficiency, high stability and high reliability.

The invention discloses a control method and device of electronic expansion valves. The control method comprises the following steps that whether a compression system runs in a parallel compression mode or not is detected; under the condition that the compression system runs in the parallel compression mode, the condensation temperature, the condenser outlet temperature and the exhaust temperatureof an exhaust port are obtained; a condenser outlet supercooling degree target value is determined according to the exhaust temperature, the adjustment of the first electronic expansion valve is controlled according to a difference value between the condenser outlet supercooling degree and the condenser outlet supercooling degree target value, wherein the condenser outlet supercooling degree is adifference value between the condensation temperature and the condenser outlet temperature; and an exhaust temperature target value is determined, and the adjustment of the second electronic expansion valve is controlled according to a difference value between the exhaust temperature and the exhaust temperature target value. By means of the control method and device, the problems that in the related art, in the control process of a double-air-cylinder compression system, due to the fact that the two electronic expansion valves are difficult to decouple, the system operation is not stable in the adjusting process is solved.

An integrated pump station with a hydraulically adjustable bottom comprises a pump station cylinder, wherein a submersible sewage pump and an overhaul platform are arranged in the pump station cylinder, the overhaul platform is arranged at the upper-middle portion of the pump station cylinder, the submersible sewage pump is arranged under the overhaul platform, the pump station cylinder is provided with a water inlet pipe and a water outlet pipe, hydraulic lifting devices are arranged at the bottom of the pump station cylinder, a stainless steel base plate is arranged on the hydraulic lifting device and is located under the submersible sewage pump, and the periphery of the stainless steel base plate is matched with the inner wall of the pump station cylinder in a sealing mode. Liquid level floating ball sensors are arranged in the pump station cylinder. The integrated pump station is simple in structure, convenient to install and capable of protecting normal work of a water pump and also achieving self cleaning, the service life of the water pump and the pump station is prolonged, a lot of manpower and material resources are saved, and the maintenance and cleaning costs are lower.

The invention relates to a novel brushless motor fuel pump. In the technical scheme, a brushless motor controller is connected outside the fuel pump, namely one end of an electronic plug-in part is connected with a fuel pump motor stator, and the other end of the electronic plug-in part is connected with the brushless motor controller; a vehicle-mounted power supply is connected outside and an integrated circuit is connected inside a voltage-stabilizing and filtering circuit in the brushless motor controller; the integrated circuit is respectively connected with a peripheral resistance-capacitance circuit and a three-phase bridge inverter; and a starting circuit and three-phase feedback voltage in the integrated circuit are connected with a phase locked logic phase change circuit respectively. The defects that a position sensor has low sealing property, ages quickly, is corroded, and the like are overcome. By a counter potential reversing technology, the pump can effectively resist fuel corrosion and fuel electric conduction, can be suitable for various liquid fuels such as gasoline, methanol, ethanol and the like, has high reliability, small volume, long service life and low price, is convenient to install, reduces a motor gap, and improves motor output and motor efficiency, and the volume of a pump body is reduced.

The invention relates to a high-temperature air source heat pump suitable for ultra-low-temperature environment and belongs to the technical field of ultra-low-temperature air source heat pumps. The high-temperature air source heat pump suitable for the ultra-low-temperature environment comprises a first air source system, a second air source system, an intermediate heat exchanger and a water tank. The first air source system and the second air source system are connected with the intermediate heat exchanger through pipelines, and the water tank is connected with the second air source system and the intermediate heat exchanger through pipelines. According to the high-temperature air source heat pump, by the adoption of a two-stage coupling system, the temperature range experienced by a refrigerant in the cycle is separated, so that the problem of the thermophysical property changes of the refrigerant at high temperature and low temperature is avoided; the first air source system adoptsair supplement to increase enthalpy, so that the heat production and energy efficiency of the air source heat pump are effectively improved, the exhaust temperature is lowered, the problem of insufficient heat supply during the first-stage compression is solved, sufficient overall heat production is ensured, and the environmental adaptability of the air source heat pump is improved.

The invention belongs to the related field of heat pumps, and discloses an evaporator and a solar heat pump water heater. The evaporator comprises a shell, a heat exchange assembly, a cross-flow fan,an air inlet passage and a transparent cover plate. One end of the shell is provided with an air inlet, and the other end of the shell is provided with an air outlet. The heat exchange assembly is located in the shell, refrigerant media circulate in the heat exchange assembly, and the surface of the heat exchange assembly is coated with a heat absorption coating. The cross-flow fan is located in the shell and arranged on one side of the heat exchange assembly. The air inlet passage is arranged between the heat exchange assembly and the cross-flow fan. The transparent cover plate is installed on the shell and right faces the sunny side of the heat exchange assembly. The solar heat pump water heater comprises the evaporator. The heat exchange assembly is coated with the heat absorption coating, the cross-flow fan is arranged, solar irradiation can be absorbed, forced convection heat exchange with air is achieved, the heat exchange amount is increased, and the fan load is reduced. The evaporator and the solar heat pump water heater have the characteristics of being simple in structure and stable in performance.

The invention relates to the technical field of mixed control, and particularly discloses a mixed control method of a mechanical arm. The mixed control method comprises the steps that the contact force between the executing end of the mechanical arm and a workpiece to be machined is acquired; whether the contact force is larger than a switching threshold value or not is judged; if the contact force is larger than the switching threshold value, a first control signal is output to a force controller, wherein the force controller is used for achieving force control over the executing end of the mechanical arm according to the first control signal; and if the contact is equal to the switching threshold value, a second control signal is output to a position controller, wherein the position controller is used for keeping current position control over the executing end of the mechanical arm according to the second control signal. The invention further discloses a mixed control device and system of the mechanical arm. According to the mixed control method of the mechanical arm, the problem of unstable operation in the prior art can be effectively solved, and the advantages of being preventing trembling of the mechanical arm and prolonging the service life of the mechanical arm are achieved.

The embodiment of the invention discloses a container testing method device and apparatus and a storage medium. The method comprises the following steps: receiving a debugging request sent by a clientfor a service container; responding to the debugging request to create a debugging container integrated with a debugging tool in a service unit to which the business container belongs, with the service unit comprising shared resources of each container; according to the debugging tool, obtaining operation information of the service container from the shared resources; and sending the operation information to the client, thereby avoiding modifying the container mirror image related to the service, reducing the development time of developers, improving the operation stability of the container mirror image, and improving the distribution efficiency of the container mirror image.

The invention provides a multi-stage sealing transformation feeding system. The multi-stage sealing transformation feeding system comprises a power device, a connecting rod, pistons, a conveying pipeline, a pressure reducing valve, a filtering device, a feeding opening and a discharging opening. All the pistons are connected in the conveying pipeline through the connecting rod to form a plurality of movable sealing chambers and are driven by the power device to carry out reciprocating motion. When the sealing chambers pass through the feeding opening, materials are added; when the sealing chambers pass through the discharging opening, the materials are fully mixed with high-pressure gas in a high-pressure material bin, have the properties of fluid and fall into the discharging opening under the action of gravity. When the sealing chambers run to a reciprocating motion extreme position and then return to the discharging opening, the pressures of the sealing chambers and the high-pressure material bin are balanced, and the remaining materials in the sealing chambers fall into the discharging opening under the action of the gravity. The no-load sealing chambers continuously run, and when the no-load sealing chambers pass through the pressure reducing valve, the pressure is reduced to the normal pressure; the sealing chambers return to the feeding opening for next-round feeding.

The invention relates to a cable crane, in particular to a non-tower cable crane, comprising a pull cable, an operating trolley, a winch and a jackstay machine; the invention is characterized in that a stable plate unit structural member is embedded in foundation and led to be connected with a combined cable saddle; the tensile force of a main rope is transferred to the foundation. In the non-tower cable crane of the invention, the stable plate unit structural member is a steel member, is fixed in the foundation and connected into a whole with the foundation; the winch is a screw friction winch, the notch of which is a semicircular rope channel; a hanger shaft is arranged between a travel wheel of the jackstay machine and a supporting wheel system so as to lead the travel wheel to be hinged with the supporting wheel system. The invention has the beneficial effects of reducing constructional cost, simplifying construction technique, improving construction precision, simplifying the operating system and ensuring the safety and the reliability of construction.

The invention discloses an air-conditioner energy saving control method and device. The air-conditioner energy saving control method includes steps of receiving power grid signals of power supply shortage and controlling air conditioners to operate in the energy saving mode based on the power grid signals of the power supply shortage. By the air-conditioner energy saving control method and device, the problem that air conditioners of the prior art cannot stably operate in case of changes of power supply of an external power grid is solved, and the effect that the air conditioners can flexibly adjust in operating strategies when power supply of the external power grid changes is realized.

The technical scheme of the invention relates to an automobile glass lifter comprising a main arm, an auxiliary arm, a fixed guide rail, a movable guide rail, a toothed plate, an electric motor, a bottom plate seat shaft and sliding blocks. One end of the main arm is fixed by toothed plate which can be driven by the electric motor, and the other end is clamped in the movable guide rail by one sliding block; one end of the auxiliary arm is clamped in the movable guide rail by another sliding block, and the other end is clamped in the fixed guide rail which is arranged parallel to the movable guide rail by still another sliding block; the main arm and the auxiliary arm are connected by a shaft pin and can rotate round the shaft pin; and the sliding blocks contact the fixed guide rail and the movable guide rail on surface. Because the sliding blocks contact the fixed guide rail and the movable guide rail on surface, the problems concerning the easy deformation of the guide rails and the easy abrasion and invalidation of the pulleys of the prior automobile glass lifter and even the unstable running of the prior automobile glass lifter are solved, and further the service lives of the components are prolonged and the quality fault of the product is decreased.

The invention discloses a non-compressed transformation dry powder pump. A pump body is provided with a powder inlet, a powder absorption chamber, a rotor cavity, a press-powder cavity and a powder discharge outlet, which are sequentially connected from top to bottom; front and rear end covers are arranged at the front and rear parts of the rotor cavity to seal the rotor cavity; the rotating shaft of the rotor is horizontally arranged; the front end rear ends are respectively arranged on the front end cover and the rear end cover; an exhaust system is arranged on the cavity body at one side of the rotor cavity; the rotor cavity is provided with six sealing tables; the sealing tables are divided into three groups and respectively arranged at the inner walls adjacent with the powder absorption chamber, the press-powder cavity and an exhaust pipe; the sections of two gaps on the rotor are of sectors; the sector top angle is greater than 15 degrees; the sector arc length is smaller than the arc length between the exhaust pipe and the press-powder cavity; and extensible members stretching along the radial direction of the rotor are arranged on the sealing tables. The non-compressed transformation dry powder pump is simple, safe and reliable in structure, can replace a transformation warehouse in a pneumatic conveying system, and avoids a fussy design of the transformation warehouse.

The invention belongs to an alkyl ester method glyphosate solvent recovery system and method, and particularly relates to recovery equipment and process for tail gas with the major ingredients of hydrogen chloride, methylal, methanol, methyl chloride and water generated after the synthesis liquid hydrolysis in the alkyl ester method glyphosate production process. The equipment and the process provided by the invention thoroughly weed out a graphite condenser highly relied in the conventional liquid phase recovery process. Compared with a conventional gas phase recovery process, the equipment and the process provided by the invention have the stable system pressure. Compared with a liquid phase recovery process, the equipment and the process provided by the invention have the advantage thatthe ton glyphosate steam consumption is reduced by 2.6t; safety and energy-saving benefits are obvious.

The invention provides a machine frame power management method and apparatus as well as a machine frame system. The management method comprises the steps of obtaining single-board information and power information in the whole machine frame; according to the single-board information and the power information, obtaining a single-board power-on/power-off instruction; and according to the single-board power-on/power-off instruction, controlling a power-on/power-off state of a corresponding single board. According to the scheme, a power supply is managed by controlling the power-on/power-off state of the corresponding single board according to the single-board information and the power information in the whole machine frame, so that the single board is powered on or off along with the adjustment of the power consumption of the system and the problem of instable running of the machine frame caused by low power of the machine frame is solved; and the overcurrent of the power supply can be prevented and certain slots are controlled to be powered off, so that the power consumption can be reduced for the system and the effects of system protection, energy conservation and environmental protection are achieved.

The invention relates to an evaporative-type condenser and a heat source device of the evaporative-type condenser. The evaporative-type condenser and the heat source device of the evaporative-type condenser comprise an upper segment box body, a lower segment box body, an air inlet and an air outlet, wherein a water-collecting box is arranged at the bottom of the lower segment box body, a first heat exchanger and a cooling water spray device are arranged inside the box body. A second heat exchanger (heat source exchanger) is arranged inside the upper segment box body, a water-blocking plate is arranged on the lower portion of the second heat exchanger, an outlet of the second heat exchanger is in series connection with an inlet of the first heat exchanger through a pipeline, and a draught fan is arranged on the top of the upper segment box body and is tightly connected with the air outlet. In addition, valves are arranged on an inlet pipeline of the first heat exchanger and an outlet pipeline and an inlet pipeline of the second heat exchanger and adjust and control working states of the first heat exchanger and the second heat exchanger through opening and closing of the valves, and accordingly a system smoothly operates in summer when the evaporative-type condenser and the heat source device of the evaporative-type condenser are used as a condenser, and can provide a sufficient heat source to the system when being used as an evaporator in winter.

The invention discloses a basic application system suitable for an intelligent terminal in a power distribution area. The system comprises a data center unit, a local communication management unit, awireless remote dialing management unit and a module manager, the data center unit is responsible for classifying, storing and managing data and parameters in an intelligent terminal and providing anoperation interface for each advanced application; the local communication management unit is responsible for managing a local communication module configured by the intelligent terminal, completing initialization and file synchronization of the communication module, and realizing data interaction between the communication module and a slave communication node of the communication module; the wireless remote dialing management unit is responsible for intelligent terminal dialing connection, state monitoring and data statistics functions; and the module manager is responsible for identifying and managing the functional modules accessed to the intelligent terminal such that the rapid access and efficient communication of different types of modules are realized.

The invention discloses a material storage balance oil circuit of a vertical injection molding machine. The material storage balance oil circuit comprises an ejection mechanism, a first electromagnetic directional valve and a second electromagnetic directional valve; a pressure oil port is formed at the P end of the first electromagnetic directional valve; the ejection mechanism is provided with afirst oil pipe and a second oil pipe; the first oil pipe is provided with a third oil pipe, a direct-acting overflow valve and a guiding-type pressure reducing valve in sequence; the other end of thefirst oil pipe communicates with the pressure oil port; the other end of the third oil pipe communicates with the B end of the first electromagnetic directional valve; the other end of the second oilpipe communicates with the B end of the second electromagnetic directional valve; a fourth oil pipe is arranged at the T end of the second electromagnetic directional valve; the fourth oil pipe is provided with a pilot-type overflow valve; one end of the fourth oil pipe communicates with the T end of the second electromagnetic directional valve, and a fifth oil pipe is arranged at the other end of the fourth oil pipe; and a first oil tank is arranged on one end of the fifth oil pipe, an oil motor is arranged at the other end of the fifth oil pipe, and the other end of the fifth oil pipe communicates with the A end of the second electromagnetic directional valve. Through the manner, the material storage balance oil circuit operates stably, the product quality is guaranteed, and the servicelife is prolonged.