40 results about "Permanent magnet direct current" patented technology

The invention relates to the technical field of motor performance evaluation, in particular to a permanent magnet direct current pump motor performance evaluation method and system based on cloud computing. Comprising the steps of obtaining current waveform data and vibration waveform data, and obtaining a first criterion based on the current waveform data and the vibration waveform data; obtaining a second criterion according to the vibration waveform data; obtaining a third criterion according to the vibration waveform data; obtaining a fourth criterion according to the current waveform data and the vibration waveform data; judging the causal correspondence between the current step and the output change of the control loop to obtain a fifth criterion; continuously observing the change trend of high-frequency components in the vibration waveform data to obtain a sixth criterion; based on the first criterion, the second criterion, the third criterion, the fourth criterion, the fifth criterion and the sixth criterion, obtaining a classification result; and confirming measures according to a classification result. The problems of repeated false alarm, invalid maintenance and system reliability evaluation deviation caused by the fact that a permanent magnet direct current pump motor performance evaluation system cannot distinguish real mechanical faults under a low-speed cruise working condition in the prior art are solved.

Technical solutions for diagnosing a sensor fault in an actuator incorporating a permanent magnet direct current (PMDC) motor are described, including: measuring, by means of a position sensor, the position of the PMDC motor; determining, based on the measured position, an estimated motor speed; measuring, by means of a current sensor, the current in the PMDC motor; determining, based on the measured current in the PMDC motor, a voltage command for the PMDC motor; determining, based on the measured current and the voltage command and using a motor speed observer, an observed speed of the PMDC motor; determining a differential speed as the difference between the estimated motor speed and the observed speed; determining, based on the differential speed, the sensor fault; and performing an action in response to the determination of the sensor fault.

The invention discloses an energy-saving operation control method and system for a permanent magnet direct current pump motor, and relates to the technical field of motor control, and the method comprises the steps: collecting a first drive current signal and a back electromotive force signal of the permanent magnet direct current pump motor; if a periodic peak and an electrical angle concentration phenomenon exist in the first driving current signal, performing quality evaluation on the back electromotive force signal to obtain back electromotive force credibility; if the back electromotive force credibility is greater than a preset credibility threshold value, applying operation parameter disturbance to the permanent magnet direct current pump motor; acquiring a second driving current signal of the permanent magnet direct current pump motor; performing disturbance response feature extraction on the permanent magnet direct current pump motor to obtain disturbance response features; identifying a disturbance source; and adjusting the operation strategy of the permanent magnet direct current pump motor to control the motor to operate. According to the method, the disturbance source can be recognized by combining the operation parameter disturbance and the disturbance response characteristics, the operation strategy is adjusted, motor operation control is achieved, and accuracy and reliability are improved.

The utility model relates to pitching equipment, in particular to an electric antenna pitching device, which is characterized in that a shell plays an important role in supporting and fixing shafting parts; the permanent magnet direct current gear motor provides an electric transmission power source; the gear pair realizes a transmission reduction ratio; the positioning device is responsible for positioning the communication antenna; the clutch device is responsible for cutting off and combining a power system and a transmission system; the locking device is responsible for rotating the antenna and is arranged on the front panel; the manual shaft, the small gear and the middle gear are responsible for the manual function. The beneficial effects of the utility model are that the communication antenna can fluctuate at will, the communication is kept normal, the positioning precision is high, the use efficiency is high, the control is humanized, the structure is simple, the size is small, the weight is light, the transmission efficiency is high, the operation is economical, the transmission power and speed range is large, the maintainability is strong, the production cost is low, the installation is easy, and the operation is time-saving and labor-saving.

The utility model relates to lodging equipment, in particular to an electric antenna lodging device, which is characterized in that a shell plays a role in supporting and fixing shafting parts; the permanent magnet direct current gear motor is used for providing an electric transmission power source; the gear pair realizes a transmission reduction ratio; the positioning device is responsible for positioning the communication antenna; the clutch device is used for cutting off and combining a power system and a transmission system; the dividing device is responsible for the on-off effect of the electromagnet; and the locking device is used for fastening the communication antenna on the output shaft, is responsible for the rotation of the antenna and is arranged on the front panel. The utility model has the characteristics of high positioning accuracy, high use efficiency, humanized control, simple structure, small volume, light weight, high transmission efficiency, economical operation, large transmission power and speed range, strong maintainability and low production cost.

The application discloses an oil-electric hybrid unmanned aerial vehicle power system and relates to the technical field of unmanned aerial vehicles and aircrafts. The application is characterized by the coaxial direct-drive direct-connection cooperation design of the propeller, the engine and the direct-current permanent magnet motor, simple structure, reliability, durability and high power-to-weight ratio. The oil-electric hybrid system is formed by the cooperation of the oil engine and the permanent magnet direct-current motor. The permanent magnet direct-current motor can start the engine and convert the excess power into electric energy to charge the storage battery. The torque of the engine can be changed by the direct-current bidirectional electric governor, so the speed of the propeller can be accurately controlled, and a three-in-one machine is formed. Different displacement engines can be matched with corresponding power direct-current permanent magnet motors. Different power ratios can be used for different models of unmanned aerial vehicles and multi-rotor aircrafts. Different accurate control and speed regulation ratios can be combined by the cooperation of different power engines and direct-current permanent magnet motors.

The utility model provides a large torque permanent magnet direct current motor, which comprises a motor shell, a rear cover, a first bearing, a second bearing, a rotating shaft, a rotor core, an arc-shaped magnet, a heat dissipation assembly, a commutator and a carbon brush assembly, and is characterized in that the heat dissipation assembly comprises a front fixing ring, a rear fixing ring and heat dissipation blades which are integrally arranged, and the periphery of the motor shell is provided with a plurality of groups of first heat dissipation holes; the heat dissipation assembly is provided with a first heat dissipation hole corresponding to the heat dissipation blades, the middle part of the heat dissipation assembly is provided with an installation cavity, the commutator is fixed on the rotating shaft, the front end of the commutator corresponds to the interior of the installation cavity, and the carbon brush assembly is fixed at the rear end of the motor shell and corresponds to the front side of the rear cover. According to the motor, the mounting distance between the commutator and the rotor core can be shortened, the structure of the motor is more compact, the size of the motor is further reduced, on the other hand, the heat dissipation assembly can quickly discharge heat from the first heat dissipation holes, the heat dissipation capability of the motor is improved, and the service life of the motor is further prolonged.

Technical solutions are described for diagnosing a sensor error in an actuator having a permanent magnet DC (PMDC) motor, including: measuring, by a position sensor, a measured position of the PMDC motor; determining, based on the measured position, an estimated motor velocity; measuring, by a current sensor, a measured current in the PMDC motor; determining, based on the measured current in the PMDC motor, a voltage command for the PMDC motor; determining, based on the measured current and the voltage command, and using a motor velocity observer, an observed velocity of the PMDC motor; determining a difference velocity as a difference between the estimated motor velocity and the observed velocity; determining, based on the difference velocity, the sensor error; and performing an action in response to determining the sensor error.

The invention discloses a permanent-magnet direct-current linear oscillation generator with a segmented stator and a segmented winding structure. The permanent-magnet direct-current linear oscillation generator comprises a stator and a rotor, the stator adopts a sectional structure and is formed by arranging m sections of stator units with the same structure along the axial direction; each stator unit comprises an inner stator, an outer stator and a coil winding; the outer stator is of a hollow circular ring structure; the inner stator comprises a first hollow circular ring and k stator teeth uniformly distributed outwards in the radial direction of the first hollow circular ring; the coil winding adopts a sectional structure, is wound on the stator teeth respectively, and is connected in series to form a single-phase winding; the rotor comprises a rotor framework and a permanent magnet; the permanent magnets are embedded in the rotor framework and are in one-to-one correspondence with the stator teeth; h groups of permanent magnets are uniformly distributed along the axial direction; and the magnetizing directions of the adjacent permanent magnets are opposite. The linear generator can be used for free piston power generation, oscillation power generation and other high-speed reciprocating linear power generation occasions, and has the advantages of being small in loss, high in power generation efficiency, low in manufacturing difficulty and the like.

The utility model relates to the technical field of motor manufacturing, and discloses a permanent magnet direct current motor casing for an engineering vehicle, which comprises an outer casing, an inner casing is arranged on the inner wall of the outer casing, and four groups of magnetic pole blocks are arranged on the inner wall of the inner casing. According to the permanent magnet direct current motor shell for the engineering vehicle, the outer shell, the inner shell, the first stepped groove, the second stepped groove and the mounting bolts are matched for use, so that the outer shell is formed by welding after a thin-wall steel plate is rolled into a cylinder, the inner shell is formed by punching a steel plate roll, and the first stepped groove and the second stepped groove are formed in the outer shell and the inner shell respectively; the mounting bolts fix the outer shell, the inner shell and the magnetic pole blocks together through the first stepped grooves and the second stepped grooves, so that compared with a traditional seamless steel tube shell, the permanent magnet direct current motor shell is lower in machining and manufacturing cost and lower in raw material cost, and the manufacturing cost of the permanent magnet direct current motor shell is further reduced.

The utility model discloses a permanent magnet direct current motor carbon brush with a reinforced structure, which comprises a mounting ring disc, two ends of the mounting ring disc are fixedly connected with side plates, one sides, deviating from each other, of the two side plates are fixedly connected with two connecting square plates, and two sides of the top of the mounting ring disc are fixedly provided with carbon brush mounting plates. The tops of the two carbon brush installation plates are fixedly connected with carbon brush fixing frames, the corresponding sides in the two carbon brush fixing frames are connected with carbon brushes in a clamped mode, and the sides, away from each other, of the two carbon brushes are fixedly connected with pressure springs. The novel permanent magnet direct current motor carbon brush is provided with the installation ring disc and the carbon brush fixing frame, the carbon brush is reinforced through the carbon brush fixing frame, the installation ring disc is used for connecting equipment, the carbon brush is stabilized, meanwhile, the side edge plate is used for fixing the structure, the carbon brush is installed and detached, and the carbon brush is prevented from being damaged after being directly detached.

The utility model relates to the technical field of barbecue machine parts, and discloses a barbecue machine gear box permanent magnet direct current motor structure which comprises a gear box body, a mounting spigot is arranged on the right side face of the gear box body, an oil bearing is arranged in the gear box body, a gear transmission part is arranged in the gear box body, and a permanent magnet direct current motor is arranged in the gear transmission part. A fixing support is arranged on the right side of the gear transmission part, and a gearbox cover is arranged on the right side of the fixing support. According to the permanent magnet direct current motor structure of the gear box of the barbecue machine, the gear box body is integrally formed through aluminum casting, the structural strength of the gear box body is improved, then the gear box cover is formed through metal plate stamping, the machining cost of the gear box cover is effectively reduced, and finally the fixing support is formed through injection molding, so that the machining efficiency is improved. The fixing support is high in structural strength and good in stability, axial movement of a gear transmission component can be effectively prevented, and the overall practicability of the device is effectively improved.

The invention provides a three-degree-of-freedom spherical joint motor module of an integrated speed reducer, which belongs to the field of motors, and comprises a sphere, two groups of outer rotor permanent magnet direct current brushless motor modules of integrated single-stage speed reducers, a group of third axial magnetic flux permanent magnet direct current brushless motor modules for driving to rotate around an X / Y axis, and a group of third axial magnetic flux permanent magnet direct current brushless motor modules of integrated two-stage planetary speed reducers, the outer rotor permanent magnet direct current brushless motor modules of the two sets of integrated single-stage speed reducers integrally rotate around the Z axis, and the two sets of outer rotor permanent magnet direct current brushless motor modules are located on the outer surface of the ball body and are arranged in a 90-degree space mode. According to the ball joint motor, the two sets of outer rotor permanent magnet direct current brushless motor modules rotate around respective rotating shafts within a certain angle range, the movement range of the ball is remarkably expanded, the torque output capacity of the ball is improved, and the ball joint motor has the advantages of being compact in structure, high in space utilization rate and the like.

The application discloses a low-noise permanent magnet DC motor, which solves the technical problem of large noise of a permanent magnet DC motor in the prior art during operation, and comprises a shell and a rotating shaft extending out of the shell, a commutator fixed on the rotating shaft is arranged in the shell, and a carbon brush in contact with the commutator to transmit current is arranged in the shell, the inner side surface of the carbon brush comprises an axial arc surface and a connecting inclined surface connected in an axial direction, one end of the connecting inclined surface is connected with the axial arc surface, the other end of the connecting inclined surface is inclined to the outside of the shell and connected with the end surface of the carbon brush, and the axial arc surface is in surface-to-surface contact with the outer peripheral surface of the commutator.

The permanent magnet direct current motor provided by the utility model comprises a permanent magnet assembly and a winding assembly, the winding assembly comprises a coil winding and a winding support frame used for supporting and winding the coil winding, the winding support frame is provided with a mounting groove, and a semiconductor refrigeration module is arranged in the mounting groove. The refrigeration end of the semiconductor refrigeration module is adjacent to the side where the coil winding is located, the high-temperature end of the semiconductor refrigeration module faces the outer edge of the winding assembly, the semiconductor refrigeration module is electrically connected with a power supply module of the motor, an installation groove is formed in the winding supporting frame for supporting the coil winding, and the semiconductor refrigeration module is arranged in the installation groove. By utilizing the characteristics of low energy consumption and high effect of semiconductor refrigeration, a local low-temperature area is generated at a coil winding position where heat is most easily generated in the motor, so that a great deal of heat is absorbed to generate an obvious cooling effect on the coil winding position, and the high-temperature end of the semiconductor refrigeration module correspondingly faces the outer edge of the winding assembly. Therefore, heat can be discharged as soon as possible through other physical heat dissipation modes.

The invention relates to the technical field of permanent magnet linear motor control, and provides a permanent magnet linear motor thrust ripple suppression method, which comprises the following steps: analyzing target sub-harmonic current by using a harmonic analysis module according to motor operation information, extracting a zero crossing point flag bit corresponding to the target subharmonic current, a quadrature-direct axis current in a synchronous rotating coordinate system and an average current in a half harmonic period; based on the zero crossing point flag bit of the target harmonic current, the quadrature-direct axis current under the synchronous rotating coordinate system and the average current in the half harmonic period, calculating the amplitude and the phase of the subharmonic voltage by using an amplitude and phase identification module; generating a PWM control signal based on the sub-harmonic voltage amplitude and the sub-harmonic voltage phase by using a motor control module; and controlling the permanent magnet direct current motor according to the PWM control signal. According to the method, the control effect of motor thrust fluctuation suppression under complex working conditions can be improved.

The utility model provides a paint grinding mechanism for a four-wire copper wire lamp machine, which comprises a main body assembly, and the main body assembly comprises a permanent magnet direct current motor, two sliding blocks, an air cylinder fixing seat and a paint grinding supporting plate. The permanent magnet direct current motor is installed on the upper surface of the motor fixing base through the motor base. The permanent magnet direct current motor drives the adapter to rotate, the adapter drives the grinding rod and the grinding rod to rotate at a high speed and a constant speed, a copper wire penetrates into the position between the paint grinding supporting plate and the grinding rod from the position above the wire guide wheel and then is connected with the winding mechanism on the rear portion, and the copper wire makes contact with the outer wall of the wire guide wheel and the upper surface of the paint grinding supporting plate. The paint grinding supporting plate is pushed upwards through the adjusting air cylinder, the paint grinding supporting plate drives the copper wire to make contact with the grinding rod upwards, and then insulating materials on the surface of the copper wire can be ground away; in the paint grinding operation process, the height of the paint grinding supporting plate can be adjusted through the adjusting air cylinder according to the use requirement, and then a copper wire is prevented from being ground off.

The utility model discloses a permanent magnet direct current booster pump which comprises a first shell and a second shell, the first shell and the second shell form a cavity, a pump body is installed in the cavity, and the outer wall of the first shell is detachably connected with an installation plate used for installing the first shell on a wall. A positioning groove is formed in the first shell, a through hole is formed in the top end of the positioning groove, a hanging lug corresponding to the positioning groove is arranged on the side wall, close to the first shell, of the mounting plate, the hanging lug is connected with the positioning groove in a matched mode, and the tail end of the hanging lug extends into the through hole. The mounting plate is fixed to the wall through the mounting holes formed in the mounting plate, then the first shell is hung on the hanging lugs through the positioning grooves, the mounting mode is rapid and convenient, and the pump body is convenient to disassemble, maintain or replace.

The invention relates to the technical field of gardening tools, and discloses a pair of gesture and manual dual-mode control electric high branch scissors which comprises a fixed shell, a sliding shell capable of relatively rotating, a cutting assembly and a wearable manipulator. A main controller, a bevel gear set, an angle adjusting disc, a shear switch and a main switch are sequentially arranged in the long rod from top to bottom. A lithium battery is located at the bottom of the long rod. The sliding shell is coaxially connected with the worm gear in the upper semi-arc-shaped shell so as to realize sliding rotation; the cutting assembly comprises a fixed blade and a sliding blade coaxially connected with the permanent magnet direct current motor. The wearable manipulator communicates with the main controller through the wireless module so as to remotely control pitching and fitting actions; the main controller drives the servo motor or the permanent magnet direct current motor to complete pitching adjustment and blade opening and closing according to received gesture signals or manual input from the angle adjusting disc. The high branch pruning efficiency and convenience are effectively improved.

Permanently excited DC motor (20) for a drive device for adjusting a vehicle assembly, with a stator (203) having a plurality of stator magnets (207, 207A, 207B) distributed around a motor axis (M), and a rotor (204) rotatable about the motor axis (M) relative to the stator (203), which rotor has a plurality of rotor poles (205) and rotor windings (206) arranged on the rotor poles (205), characterized in that side edges (209) of the stator magnets (207, 207A, 207B) are aligned obliquely to the motor axis (M) and / or that a first group of stator magnets (207, 207A, 207B) distributed around the motor axis (M) and a second group of stator magnets (207, 207A, 207B) distributed around the motor axis (M) and axially offset to the first group have an angular offset (β) around the motor axis (M) relative to one another.

A frame-type bilateral reverse permanent magnet direct current linear motor is provided, including a support frame, an iron yoke assembly with a first iron yoke, a second iron yoke and a middle iron yoke, a permanent magnet group, a coil winding and a pole piece assembly. Two groups of intermediate transition permanent magnet assemblies are disposed between the first iron yoke and the middle iron yoke and between the second iron yoke and the middle iron yoke. The intermediate transition permanent magnet assemblies includes transition permanent magnets and corresponding transition connection iron yokes; and magnetic pole orientations of the transition permanent magnets of the two groups of intermediate transition permanent magnet assemblies are reverse. The linear motor realizes efficient direct-current linear control, and has a high speed, a precise controllability, a high thrust density and small thrust fluctuation, and easiness in assembling.

The utility model relates to a large-scale permanent-magnet direct-current brushless industrial ceiling fan motor, which belongs to the technical field of industrial ceiling fan motors and comprises a beam, an adjusting disc is arranged at the bottom of the beam, mounting grooves are formed in the adjusting disc at equal intervals, screw rods are rotatably mounted in the mounting grooves, and threaded blocks are in threaded connection with the outer sides of the screw rods. The threaded blocks are slidably connected with the inner walls of the corresponding mounting grooves, and the tops of the threaded blocks are rotationally connected with connecting rods. The beneficial effects of the utility model lie in that when the angles of the adjusting disc and the brushless motor need to be adjusted, a worker can rotate the one-way or multi-way screw rod, so that the threaded block slides in the corresponding mounting groove, and then the angle of the adjusting disc can be adjusted by means of the connecting rod so as to adapt to the mounting requirements of different angles; and therefore, the inclination phenomenon of the industrial ceiling fan in the using process can be avoided, and the using safety of the device can be improved.

The utility model relates to an isolating switch part, in particular to a permanent magnet direct current speed reducing motor. The device comprises a motor and a reduction gearbox, the output end of the motor extends into the reduction gearbox and is sequentially meshed with a first-stage reduction gear, a second-stage reduction gear and a third-stage reduction gear, and the first-stage reduction gear, the second-stage reduction gear and the third-stage reduction gear are all in running fit with the reduction gearbox. The three-stage speed reducer is characterized in that a clutch is arranged in the speed reduction box, a clutch large gear and a clutch small gear are arranged on the clutch, and the clutch large gear is meshed with the output end of the three-stage speed reduction gear. An output shaft is arranged in the reduction gearbox, the output shaft is in running fit with the reduction gearbox, an output gear is fixedly connected to the output shaft, and the output gear is meshed with a clutch pinion of the clutch. The permanent-magnet direct-current speed-reducing motor not only can reduce the stress of the output end of the clutch and prolong the service life of the permanent-magnet direct-current speed-reducing motor, but also can improve the response speed of the clutch and timely control the isolating switch.

The utility model relates to a permanent magnet direct current brush fan, which comprises a motor comprising a rotor assembly, a stator assembly, a brush carrier assembly and an end cover, one end of the rotor assembly is mounted in the end cover; the brush carrier assembly is fixed on the end cover and is connected with the rotor assembly; a certain air gap is kept between the stator assembly and the rotor assembly, and the rotor assembly can rotate in the stator assembly; the fixed impeller is fixedly arranged on the outer wall of one end of the motor; and the movable impeller is fixed at the other end of the rotor assembly through a nut. According to the utility model, the whole fan is convenient to mount and dismount, and the maintenance cost is reduced.

The invention is suitable for the technical field of permanent magnet direct current motors, and provides a permanent magnet direct current motor control device which comprises a base, a supporting plate is fixedly installed at the top of the base, a motor body is fixedly installed at the top of the supporting plate, a box body is fixedly connected to the top of the base, and a fan is fixedly installed at the top of the base. According to the permanent magnet direct current motor control device, the exhaust pipe exhausts gas through the exhaust holes, so that the gas in the motor body is disturbed, the gas in the motor body is driven, heat in the motor body can be exhausted to the external environment more smoothly, the heat dissipation efficiency is improved, and the service life of the motor body is prolonged. And meanwhile, the motor body is surrounded by the first heat dissipation spiral pipe and the second heat dissipation spiral pipe, so that a part of heat on the outer surface of the motor body can be taken away in the process that gas flows in the first heat dissipation spiral pipe and the second heat dissipation spiral pipe.

Device for generating pulsation for a washbasin seat (10) with which the flushing water spraying towards the human genitals is pulsated, the device comprising the following elements: an electric motor (30); a linear motion element (39) that is linearly movable such that the volume of a pump chamber (24a) arranged on a flow channel of the rinse water is changed depending on the rotation of the electric motor (30); and a stroke quantity setting means (40) with which the stroke quantity of the linear motion part (39) can be adjusted, wherein the stroke quantity setting means (40) is a control means (40) with which the electric motor (30) can be controlled so that it is driven alternately in the forward direction and in the opposite direction within a certain angular range which includes less than 180 degrees, the electric motor (30) is a DC motor (30) with permanent magnets, and the DC motor (30) can be controlled by the control means (40) such that it rotates in the forward direction when the current is switched on and in the opposite direction when the current is switched off due to a cogging torque.

The utility model provides an inner rotor brushless permanent magnet direct current motor without a shell shape, which belongs to the technical field of electric tool motors and comprises a motor main body. According to the utility model, the phase power line of the Hall plate assembly is connected with the controller on the equipment, the Hall element of the Hall plate assembly induces the position angle condition of the magnet in the rotor assembly, the controller orderly supplies power to the stator assembly, the motor main body has no rotor core, and the rotor core, the process and the tool do not need to be assembled by stamping; the motor body is compact in structure, small in size and high in applicability, the magnets can be limited and fixed under the arrangement of the first sheath, the second sheath and special glue, and the motor body can be cooled by positive and negative rotation air draft under the arrangement of the axial-flow blades of the rotor fan blades, so that the service life of the motor body is prolonged. Therefore, the problem that the motor main body is easy to fail in a high-temperature environment is solved, and the service life of the motor main body in the high-temperature environment is prolonged.

The invention discloses a three-phase brushless permanent magnet direct current motor which comprises a motor shell, a stator assembly is arranged in the motor shell, a rotor assembly is movably arranged in the stator assembly, a motor rotating shaft is fixedly arranged in the rotor assembly, and the two ends of the motor rotating shaft are arranged in the motor shell through bearings respectively. The motor is characterized in that the stator assembly comprises an installation cylinder, a plurality of installation groove holes are evenly distributed in the installation cylinder in the circumferential direction, stator iron cores are movably arranged in the installation groove holes, coils are wound on the stator iron cores, the air gap sensor is connected with the controller, and the controller is connected with the motor. And a dynamic adjusting mechanism capable of driving the stator core to move so as to adjust the air gap between the stator core and the rotor assembly is arranged in the motor shell. In order to overcome the defects in the prior art, the invention provides the three-phase brushless permanent magnet direct current motor which is simple in structure and can dynamically adjust the air gap according to different working conditions.

The invention provides a photovoltaic water pump power conversion device, which relates to the field of new energy power electronics and comprises a Boost-Buck converter, an RS485 communication interface, an RS232 communication interface, a microprocessor, a photovoltaic module, an irradiance sensor, an upper computer, an auxiliary power supply, a voltage and current detection device, a grid driving chip, a flow sensor and a permanent magnet direct current water pump which are cascaded, the photovoltaic module is connected with the input port of the cascaded Boost-Buck converter, and the output port of the cascaded Boost-Buck converter is connected with the permanent magnet direct current water pump. The method solves the problems that when the motor load changes instantaneously, the duty ratio cannot be adjusted in time through single-duty-ratio control, large overshoot or drop of the output voltage can be caused, working modes need to be switched frequently through double duty ratios, efficiency is low, and smooth transition between the modes is difficult to achieve.

The application relates to a micro-distance permanent magnet DC micro-rotation motor capable of realizing high-precision reciprocating transmission, and belongs to the technical field of micro special motor, which comprises a motor base and a rotor arranged in the motor base, a ring-shaped permanent magnet is fixedly sleeved on the rotor, the ring-shaped permanent magnet is movably arranged in a coil framework, a high-temperature armature winding is wound on the coil framework, and a connecting post connected with two ends of the high-temperature armature winding is arranged on one end of the coil framework; the two ends of the rotor are rotationally connected with the coil framework through bushings; a containing chamber is arranged on the motor base, and a ring-shaped magnetic yoke is fixedly arranged in the containing chamber; compared with the previous continuous rotation motor mechanical transmission mechanism, the application has the advantages of stronger comprehensive environmental adaptability, smaller size, lower power consumption, larger output torque, stronger anti-interference capability, higher reliability, easier processing and lower cost.