436results about How to "Simple and compact structure" patented technology

The invention discloses a motor rotor automatic assembling machine including an iron core feeding device, a main shaft feeding device, a press-fit device, an insulating sheet feeding device, a turning device, a dispensing device, a commutator feeding device, a rotary disc conveyer, and a discharging device. The rotary disc conveyer includes a first rotating disc and a second rotating disc, the iron core feeding device, the main shaft feeding device, the press-fit device, and the insulating sheet feeding device are cooperated on the first rotating disc to assemble an iron core, a main shaft, and an insulation sheet into a half-finished rotor, the turning device conveys the half-finished rotor to the second rotating disc, the insulating sheet feeding device, the dispensing device, the commutator feeding device, and the press-fit device are cooperated on the second rotating disc to assemble the half-finished rotor, a lower insulation sheet, and a commutator into a finished rotor, and the discharging device takes the finished rotor off the second rotating disc and rotates for discharging. The whole machine is compact and reasonable in structure, high in efficiency, low in cost, and high in automation degree.

The invention relates to opening-nozzle saddle-shaped seam welding equipment, which mainly comprises a cross-shaped automatic operation machine (1), a welding head track (2), a welding head (3) and a cylinder body workpiece (4). An axial moving device (11) of the cross-shaped automatic operation machine (1) is connected with a corresponding basic part; a vertical lifting arm (12) of the cross-shaped automatic operation machine (1) is assembled together with a transverse moving arm (13) by taking the axial moving device (11) as the base and is connected with the welding head track (2) through a suspension arm (17); and the welding head (3) is connected with the welding head track (2) through a locking mechanism (31) and can run along a ring-shaped track (21). The equipment achieves the function of multiple purposes, namely can perform gas cutting or plasma cutting on a saddle-shaped bevel pipe end and a pipe hole, and can perform high quality welding between the bevel pipe end and the pipe hole after an actuating mechanism is replaced; and in addition, the equipment has a compact and simple structure and is very suitable to be used on a construction site.

A process and a device for determining the viscosity of a fluid are proposed. Very simple and accurate determination is enabled in that the magnetic particles in the fluid are set into vibration by a magnetic field which varies over time. A measurement of the amplitude and/or phase of particle vibration is used to determine the viscosity or an associated quantity, such as the coagulation of blood or the glucose content.

The invention discloses a multi-spectral phase-type metasurface device and belongs to the metamaterial technical field. The multi-spectral phase-type metasurface device of the invention is composed of a nano unit structure array which is formed on ultra-thin metal or a medium through etching. According to the multi-spectral phase-type metasurface device of the invention, multi-frequency information is coded onto a metasurface; and phase regulation can be performed on electromagnetic waves of a plurality of wavelengths by using wide-band spin-orbit interaction of nanostructures on the metasurface, so that the electromagnetic waves with different wavelengths and different incident angles can be focused to a specific shape. Therefore, the multi-spectral phase-type metasurface device of the invention can be applied to the design of a multi-wavelength ultra-small optical device and an integrated optical system.

A fuel cell includes an electrolyte electrode assembly and a pair of separators sandwiching the electrolyte electrode assembly. Each of the separators is a single plate, and includes a plurality of circular disks. First protrusions and second protrusions are provided on both surfaces of the circular disk. The first protrusions contact the anode of the electrolyte electrode assembly, and the second protrusions contact the cathode of the electrolyte electrode assembly. A channel member is provided on a surface of the separator facing the cathode. The channel member forms a plurality of fuel gas supply channels connected between a fuel gas supply passage and a fuel gas inlet for supplying a fuel gas into a fuel gas flow field.

The invention relates to an ultra-wide frequency band multi-band array antenna which comprises a metal reflection plate, a low-frequency radiation unit and a high-frequency radiation unit. The low-frequency radiation unit and the high-frequency radiation unit are mounted on the metal reflection plate, the low-frequency radiation unit works on a low-frequency band, and the high-frequency radiation unit works on a high-frequency band. The low-frequency radiation unit comprises two low-frequency oscillators which are both in +/-45-degree polarization and are mounted in a mutually orthogonal mode, the two low-frequency oscillators are connected with a feed network, and a +/-45-degree polarization far field radiation directional diagram is generated; the high-frequency radiation unit comprises two high-frequency oscillators which are both in +/-45-degree polarization and are mounted in a mutually orthogonal mode. The multi-band array antenna is capable of covering a 694-960 MHz ultra-wide frequency band and a 1710-2690 MHz ultra-wide frequency band and is simple in structure so as to be compatible with all frequency bands of a current mobile communication network.

A magnetic levitation device with the function of automatically lifting a suspended matter comprises a magnetic levitation component; a lifting component is arranged on the magnetic levitation component and at the position corresponding to the suspended matter; the lifting component comprises a pallet rack, a lifting column, a lifting transmission component and a control unit; the pallet rack is positioned at the bottom of the suspended matter; one end of the lifting column is connected with the pallet rack, and the other end of the lifting column is connected with the output end of the lifting transmission component; and the control terminal of the lifting transmission component is connected with the control unit. The magnetic levitation device has the advantages of simple and compact structure, low cost, high degree of automation, simplicity and convenience in operation, stability and reliability in working, and the like.

The invention discloses a bionic flapping-wing machine with double-section main wings. The bionic flapping-wing machine comprises a driving mechanism, a main bracket, a tail-wing mechanism, a double-section flapping-wing mechanism and two steering machines, wherein the driving mechanism is connected with the front end of the main bracket; the tail-wing mechanism is connected with the rear end of the main bracket; the double-section flapping-wing mechanism is connected to the driving mechanism; the two steering machines are arranged on the main bracket. The bionic flapping-wing machine disclosed by the invention has the following beneficial effects that the structure is simple and compact, the flapping-wing movement with complete symmetry can be realized, the flapping-wing machine can fly like a bird by adopting the double-section flapping-wing mechanism, due to the foldable wings, the resistance of the wings can be small in upwards flapping and the wingspan area can be the largest in downwards flapping, so that large lifting force is generated, and the flying speed and the hang time are increased. In addition, a spherical pair is adopted for connection with the tail-wing mechanism, the direction control of the flapping-wing machine is sensitive and the flapping-wing machine can imitate the flying of the bird. Furthermore, the bionic flapping-wing machine can be applied to the fields of bird repelling of an airport, monitoring, intelligence gathering, disaster rescuing and searching and the like.

A method of shutting down a fuel cell system includes a first step of supplying hydrogen gas and air to a fuel cell stack to thereby cause the fuel cell stack to generate electricity, and a second step of stopping supply of the hydrogen gas, and then supplying air to the fuel cell stack so as to cause the fuel cell stack to generate electricity upon detection of a command to shut down the fuel cell stack. In the second step, when the pressure of the hydrogen gas is lowered to a preset lower-limit value based on an anode pressure, which actually is measured, the fuel cell stack is caused to stop generating electricity.

The invention provides a deep sea ballast releasing device. The device comprises a bracket, wherein the bracket is provided with an electric solenoid component and a two-stage lever releasing component; the electric solenoid component consists of a deep sea electric solenoid and an electric solenoid plunger; the two-stage lever releasing component consists of a first-stage lever and a second-stage lever; the first-stage lever and the second-stage lever can rotate on a vertical plane around a supporting point on respective bracket; the position of the gravity point of the first-stage lever is restrained by one end of the electric solenoid plunger; the force point of the first-stage lever is the gravity point of the second-stage lever; and the force point of the second-stage lever is a ballast suspension point. The first-stage lever is matched with the second-stage lever to obtain a relatively long resistance arm with a relatively small space, and the release of the ballast is controlled by a small power produced after the electric solenoid is electrified, so that the safety and the reliability are achieved. The device has a simple and compact structure, can be used repeatedly and used in full sea depth, has pressure resistance and corrosion resistance, can be reliably carried and release ballast of 100 kilograms, has short response time and is particularly suitable for releasing the ballasts of underwater robots and deep sea engineering machinery.

The invention relates to a magnetic negative stiffness damper. The magnetic negative stiffness damper comprises a conductive pipe, an installation shaft, a sliding bearing and one or more pairs of magnets arranged in the axial direction of the conductive pipe. Each pair of magnets comprises the first magnet and the second magnet with the geometric centers located in the same horizontal positions in a balanced state. The first magnets are installed inside the conductive pipe through the installation shaft and are controlled by the sliding bearing to move in the axial direction. The second magnets are fixed to the conductive pipe. The axial magnetization directions of the first magnets and the second magnets are the same, and the negative stiffness function is formed through the relative movement of the first magnets and the second magnets. The conductive pipe is located in the position symmetrical with the two ends of the second magnets, and an electric eddy current damping function is formed through the relative movement of the first magnets and the conductive pipe. The magnetic negative stiffness damper integrates negative stiffness and electric eddy current damping, is simple and compact in structure and is capable of being widely applied to vibration control of construction, mechanical and aerospace structures.

A driving device for a hatch in a motor vehicle includes a first fastening element which can be connected to a stationary structural component, a second fastening element which can be connected to a movable structural component, a spindle drive including a threaded spindle having an axis of rotation and a spindle nut arranged on the threaded spindle, and a rotary drive having a driveshaft for rotating spindle to move the first fastening element axially relative to the second fastening element. A stroke detection sensor for continuously detecting the position of the movable structural component includes a rotatable sensor element driven in rotation by the driveshaft and a stationary sensor element for continuously detecting the rotational position of the rotatable sensor element. A gear reduction unit is provided between the driveshaft and the rotatable sensor element so the revolutions of the sensor element are reduced by about 14:1.

A fuel cell includes an electrolyte electrode assembly and a pair of separators sandwiching the electrolyte electrode assembly. Each of the separators is a single plate, and includes a plurality of trapezoidal portions. First protrusions and second protrusions are provided on both surfaces of the trapezoidal portion. The first protrusions contact the anode of the electrolyte electrode assembly, and the second protrusions contact the cathode of the electrolyte electrode assembly. A fuel gas inlet for supplying a fuel gas into a fuel gas flow field is formed on the trapezoidal portion. The fuel gas inlet is provided at an upstream position away from an intermediate position of the electrolyte electrode assembly in a flow direction of an oxygen-containing gas.

The invention discloses a leg of a multi-legged walking robot. The existing flat soled leg structure is complex and easy to cause tripping over. The robot leg comprises a leg mechanical device of the multi-legged walking robot and a leg dynamometrical device of the multi-legged walking robot. The leg mechanical device of the multi-legged walking robot comprises a spherical foot, a damping dynamometrical portion and a shank connector, and the damping dynamometrical portion comprises a spherical foot connector, a leg connector, a leg sleeve, a damping compression spring, a pressure pad and fixing screws. The leg dynamometrical device of the multi-legged walking robot consists of a pressure sensor and a signal acquisition processor. The leg of a multi-legged walking robot is in the sphericalfoot end type foot structure and simple and compact in structure, and the multi-legged walking robot is flexible and reliable in walking. Impact between the multi-legged walking robot and the ground during walking of the robot is effectively reduced by means of the compression spring damping device. Difficulty and complexity in dynamometry of the leg of the multi-legged walking robot are greatly reduced by using the pressure sensor for dynamometry of the leg of the multi-legged walking robot.

The invention discloses a dexterous hand driven by shape memory alloy. The dexterous hand comprises three fingers which are structurally consistent, a palm and a control system. Each finger is composed of distal knuckle bone, a middle knuckle bone and a proximal knuckle bone. Bending and stretching of one whole finger are achieved by finger joints, side sway of the fingers is achieved by the joints among the proximal finger bones, and bending and stretching of the distal knuckle bones are achieved by the joints among the distal finger bones. The three fingers have nine joint freedom degrees totally, and each joint is driven forwardly and reversely by a swinging mechanism composed of two shape memory alloy metal wires. The control system comprises a Windows PC (personal computer), a real-time controller, an I/O (input/output) module, a drive circuit and an angular sensor. The shape memory alloy metal wires are internally disposed in the fingers and the palm of the dexterous hand to directly drive the finger joints, and accordingly a medium drive mechanism is omitted. The dexterous hand is simple and compact in structure, small in size and light in weight and is suitable for being used as an end actuator of a mechanical arm which is light in load to implement dexterous grabbing and precision operation of objects different in shape and size.

An auto document feeder includes a housing unit, spatially interconnected first and second paths, an inverting path in spatial communication with the first path, a bypass path spatially intercommunicating the second path and the inverting path, a feeding roller unit for feeding documents onto the first path, first and second transfer roller units disposed respectively on the first and second paths, an ejecting roller unit aligned with the second path and the inverting path, and a switching gate disposed between the ejecting roller unit and the second transfer roller unit and pivotable to extend onto the second path or the bypass path so as to guide movement of the documents.

The invention discloses a special robot with a wave compensation function and a wave compensation method, and belongs to the field of offshore ship operation. The front end of a small arm is connected with the rear end of a wrist mechanism, the front end of the wrist mechanism is rigidly connected with an end effector actuator, the rear end of the wrist mechanism comprises a first actuator and a second actuator, the front end of the wrist mechanism comprises a differential mechanism and two supporting arms, and a supporting frame is arranged in the middle of the wrist mechanism and fixedly connected with the front end of the small arm. The left supporting arm and the right supporting arm are fixedly connected to the front lateral sides of the supporting frame, and the differential mechanism is arranged between the two supporting arms. The differential mechanism is composed of four bevel gears, a deflection shaft and two pitching driving shafts, wherein the deflection shaft is vertically arranged, the central line of the first pitching driving shaft and the central line of the second pitching driving shaft are collinear and perpendicular to the central line of the deflection shaft, and the two pitching driving shafts are symmetrically arranged at the left side and the right side of the deflection shaft. The wrist mechanism has three independent freedom degrees so that the robot can have more postures, and rolling, pitching and yawing, caused by wind waves, of a ship can be compensated in real time.

The invention relates to a large-angle rotary joint mechanism of manipulators, belonging to the technical field of machinery, which is characterized in that, a first steel wire rotary table, a third steel wire rotary table and a first joint shaft are fixedly arranged at the root of a first arm respectively; a second steel wire rotary table a fourth steel wire rotary table and a second joint shaft are fixedly arranged at the root of a second arm respectively; a joint shaft connecting rod is arranged on the first joint shaft and the second joint shaft, which can rotate respectively and freely along the axis of the first joint shaft and the second joint shaft; the first to the fourth wire ropes are respectively wound on the U-shaped grooves of the first to the fourth steel wire rotary table; an 8 shape is formed after being wound, and the tension state is maintained. The large-angle rotary joint mechanism has the advantages that the contradiction between the stiffness of the rotary joint mechanism of the manipulator and the dimension of a rotational angle is solved; a large-angle rotary joint mechanism having an angle ranging from about positive 180 degrees to negative 180 degrees is provided; meanwhile, the joint mechanism has simple and compact structure, neat appearance, light weight, large stiffness, no need of precision parts for manufacturing and processing, low cost, and the like, and application space is large.

The invention relates to the technical field of equipment and method for packaging of pipes, and in particular relates to an automatic on-line pipe bundling device and method. The device comprises a rack, wherein a pipe collecting unit, a pipe temporary storage unit, a pipe-taking counting unit, a pipe arranging unit and a pipe conveying unit are arranged on the rack, wherein the pipe collecting unit is provided with a first outlet and is communicated with the pipe temporary storage unit through the first outlet; the pipe temporary storage unit is provided with a second outlet through which only one pipe passes and is communicated with the pipe-taking counting unit through the second outlet; the pipe-taking counting unit is used for conveying pipes to the pipe arranging unit one by one and counting the quantity of the pipes. According to the device, the automatic processes of collection and detection of the pipes, arranging and sequencing of the pipes, raising and counting of the pipes, winding and bundling of the pipes, and the like are automatically finished. The device has a simple and compact structure and is small in occupying space; the method for bundling the pipes is high in automation degree and is suitable for popularization and application.

The invention discloses a magnetic separator. The magnetic separator comprises an ore dressing cavity through which ore pulp passes, wherein a magnetic separating component is fixed at the outer wall of the ore dressing cavity; and a pushing component for pushing a magnetic material absorbed at the inner wall of the ore dressing cavity out of the ore dressing cavity is arranged inside the ore dressing cavity. The magnetic separator has the advantages that the magnetic separator is simple and compact in structure, small in floor area, high in magnetic energy utilization rate, small in physical inclusion of magnetic concentrate, low in magnetic iron loss rate of magnetic tailings, high in ore dressing efficiency and the like.

The invention discloses a single-ended VSC-HVDC photovoltaic power generation system, which comprises more than one photovoltaic direct current booster station, an HVDC positive cable, an HVDC negative cable, an HVDC converter, a transformer and a high voltage alternating current network, the positive and negative ends of the photovoltaic direct current booster station are respectively connected with the HVDC converter via the HVDC positive cable and the HVDC negative cable, and the output end of the HVDC converter is connected with the high voltage alternating current network via the transformer. The system has the advantages of being simple and compact in structure, low in cost, easy to install and use, high in efficiency, wide in application scope and the like.

The invention discloses an automatic presser foot lifting and backward and forward sewing device of a sewing machine. The automatic presser foot lifting and backward and forward sewing device comprises a presser foot lifting driver. A first straight rod of the presser foot lifting driver is connected with one end of a pull rope of a pull rope assembly, and the other end of the pull rope is connected with one end of a swing rod. The other end of the swing rod is in contact with one end of a presser foot lifting rear lever which can swing around the lever axis. A presser foot lifting mechanism is connected with the other end of the presser foot lifting rear lever and can be driven to act through swing of the presser foot lifting rear lever. The automatic presser foot lifting and backward and forward sewing device further comprises a backward and forward sewing driver. A second straight rod of the backward and forward sewing driver is connected with one end of a pull rod, and a swing plate seat is connected with the other end of the pull rod. Backward and forward sewing action can be achieved through swing of the swing plate seat. The automatic presser foot lifting and backward and forward sewing device is simple and compact in structure, convenient to install and maintain, low in manufacturing cost and capable of being in comprehensive application with a traditional presser foot lifting and backward and forward sewing mode. The invention further discloses the sewing machine with the automatic presser foot lifting and backward and forward sewing device.

The invention relates to an installing structure for a washing machine draining pump. The installing structure is characterized by comprising a washing machine box body, wherein the bottom of the box body is provided with a lower-front reinforced piece and a washing machine sealing bottom; the draining pump is connected with the washing machine sealing bottom through a main damping cushion; both sides of the lower part of the pump body of the draining pump are provided with support feet; the support feet are provided with openings; two pear-shaped irregularly-shaped holes are formed in the washing machine sealing bottom; a smaller hole of the irregularly-shaped holes is close to the lower-front reinforced piece; the main damping cushion is a revolving body like a Chinese character 'wang', and is provided with an upper groove and a lower groove; the openings of the support feet are clamped in the upper groove of the main damping cushion; the smaller hole of the irregularly-shaped holes in the washing machine sealing bottom is clamped in the lower groove of the main damping cushion; either the front part or the back part of the pump body is connected fixedly. According to the installing structure, the main damping cushion adopting the revolving body like a Chinese character 'wang' is arranged between the pump body and the washing machine sealing bottom, and the front part or the back part of the draining pump is fixedly connected, so that the structure is simple and compact, vibration and noise can be reduced effectively, the production cost is low, and installation is convenient and rapid.

The present invention disclose a flow equalizing apparatus used in heated air circulation sterilization dryer for heating cavity, including flow equalizing board, flow controlling board and diffuser cover arranged between the air heater and the dryer filter, the flow board is mounted beneath the filter, the flow controlling board is mounted beneath working objects. The diffuser cover includes diffuser frame, fan housing connected with the air heater air outlet and flow diffuser plate mounted onto the filter air inlet, the air outlet of the fan housing is connected with inlet frame of the flow diffuser frame, the air outlet of diffuser frame is connected with flow diffuwer plate. The diffuser frame is composed of a plurality of criss-cross splitter plates, and forming a plurality of air inlet holes on the air inlet end surface on the diffuser frame via criss-cross splitter plates, and forming a plurality of air outlet holes on the air outlet end surface of the diffuser frame. The invention is a flow equalizing apparatus for heated air circulation sterilization dryer heating cavity with simple and compact structure, low cost, convenient installation, wide application range, being capable of improving the work efficiency of machine.

The invention discloses a double-layer vibration isolation seat, which comprises a seat surface and a vibration isolation platform arranged below the seat surface, wherein a seat base is arranged below the vibration isolation platform, and is characterized in that: a first-layer vibration isolation structure positioned at the lower layer and a second-layer vibration isolation structure positionedat the upper layer are arranged between the seat base and the vibration isolation platform, wherein the first-layer vibration isolation platform structure comprises vertically arranged vertical damping springs and negative rigidity vibration isolation structure arranged at the front and rear sides of the vertical damping springs, and the second-layer of vibration isolation structure is arranged above the vertical damping spring. The double-layer vibration isolation seat disclosed by the invention is simple and compact in structure and good in vibration isolation effect; the vibration isolationstructure at the bottom layer is connected with the spring damping above in series to form the double-layer vibration isolation structure, so that the damping ratio, the mass ratio and the rigidity ratio can be properly reduced, thereby the vibration isolation performance of the whole double-layer vibration isolation system is improved; meanwhile, the chair has the advantages of low cost, high reliability and comfort, and better application prospect.

A foldable seat for a rollator or a wheelchair includes a first plate and a second plate. The plates are rotatably moveable between an unfolded position and a folded position.

A hinge pivotally connects said first plate to said second plate. An exemplary hinge comprises at least a first cylinder integral with said first plate and at least a second cylinder integral with said second plate.

The seat further comprises a locking/unlocking system configured to be actuated by the user so as to lock, respectively unlock, said first and second plates into, respectively from, said unfolded position and/or said folded position. The locking/unlocking system being at least partially lodged inside said first and/or said second cylinder.

The invention relates to a revolving drum type micro-filter. The revolving drum type micro-filter comprises a driving device (1), a box body (2), a housing (3), a revolving drum (4), a flushing device (5), a micro filtering net (6) and a dirt discharging groove (9). According to the method for processing sewage, sewage can flow into the hollow revolving drum, due to the action of gravity, the liquid flows towards the outer side of the filtering net from the inner side of the filtering net, and suspended matter in the water is intercepted on the inner side of the stainless steel filtering net; the revolving drum revolves slowly, a flushing water pump of the flushing device extracts the filtered water to conduct back flushing on the filtering net, the flushing water is used for flushing the filtering net from the outer side of the filtering net to the inner side of the filtering net through a nozzle of the flushing device located on the top of the revolving drum, and particulate matter which is flushed away is collected through the dirt discharging groove and is discharged out of the micro-filter through a sewage pipe. The micro-filter is simple and small in structure, small in occupied area, good in treatment effect, convenient to maintain, low in unit treatment cost and more environmentally friendly compared with other filtering devices.

In an electric vehicle, a power unit is installed in an internal space region of a tire of each of front and rear wheels. The unit has a plurality of power elements arranged on an inner peripheral surface of a ground contact portion of the tire. Each of the elements includes a core made of a permalloy, and a power coil wound around the core. When a periodically-changing magnetic field is generated in a region above a road by an electric supply arrangement installed in the road, each of the elements generates electric power. This electric power is supplied to a motor of the vehicle through a power distribution system. The motor drives front wheels. The electric vehicle can continuously run over long distances without charging a battery at a buttery station.

The invention discloses a high-pressure water jet sand-blast cleaning production line for the inner surface of tubing. The high-pressure water jet sand-blast cleaning production line comprises a high-pressure water generating system, an abrasive supplying system, an abrasive circulating system, a water circulating system, a tubing rotating drive mechanism, a nozzle and a nozzle moving mechanism, wherein the input end of the nozzle is communicated with the high-pressure water generating system and the abrasive supplying system, the tubing to be treated is arranged on the tubing rotating drive mechanism, and the nozzle and an abrasive tank in the abrasive supplying system are installed on the nozzle moving mechanism, and the abrasive supplying system synchronously moves along with the movement of the nozzle. The high-pressure water jet sand-blast cleaning production line has the advantages of simple and compact structure, low cost, convenience in operation, good cleaning effect, high efficiency and the like.

The invention relates to an oscillating buoy type ocean wave power generating device. The oscillating buoy type ocean wave power generating device comprises a wave power absorbing device which floats on the sea, a supporting device which is connected with the wave power absorbing device by a sliding device, a conversion device and an output device which is connected with the conversion device. The supporting device comprises an upper supporting frame and a lower supporting frame which are arranged in parallel and with same axle center. The upper supporting frame and the lower supporting frame are both mounted on an ocean column in a sleeving manner. A main shaft of the conversion device is connected with a generator rotary shaft of an input device. According to the device, the up-and-down reciprocating motion of wave can be converted into the rotation of the main shaft through sprocket chain transmission. The main shaft is connected with a energy storage flywheel, so that an electric generator can run stably during the conversion of the ascending and descending of the wave power absorbing device under the action of the wave. The continuity of power generating can be guaranteed, so that the stability of power generating can be guaranteed.