82results about How to "Smooth speed regulation" patented technology

The invention relates to a speed-adjusting-type permanent-magnet drive system, comprising a conductor rotor (a first rotor), a magnetic rotor (a second rotor) component and a lead screw regulator, wherein the conductor rotor (the first rotor) is arranged on an input shaft; the magnetic rotor (the second rotor) is arranged on an output shaft; the conductor rotor comprises a disk-shaped steel frame and a copper conducting ring; the surface of a steel plate is provided with the copper conducting ring; the opposite surfaces of a permanent-magnet rotor and the conductor rotor are embedded with permanent magnets; the gap of the opposite surfaces of the conductor rotor and the permanent-magnet rotor can adjust an axial air clearance; and the conductor rotor and the permanent-magnet rotor are coupled by the magnetic force. When the conductor rotor rotates, the permanent-magnet rotor also rotates along the same direction with the conductor rotor due to the coupling action of the magnetic force; the conductor rotor (the first rotor) is fixedly connected with the input shaft; the permanent-magnet rotor (the second rotor) is connected with the output shaft by a shaft section; the regulator is arranged on the shaft section; and the air clearance between the disk surfaces of the two rotors can be adjusted by the regulator, thus changing the torque and the rotating speed and achieving the purpose of speed adjustment.

The invention relates to grinding processing equipment mainly used for a silicon wafer, a harddisk substrate, a master disc of a compact disc, a ceramic wafer, a quartz crystal and other hard and brittle materials, in particular to a numerically-controlled precise grinding polisher. The grinding processing equipment comprises a welding box body (16); a main supporting seat (14) of the welding box body is provided with a mainshaft drive system (15); a cylinder rod of a rapid acting cylinder (5) of an upper disc device is downward and fixedly arranged in the center of a crossbeam; the cylinder rod of the rapid acting cylinder (5) is connected with a slow acting cylinder (4); the inside of an operating box (12) is provided with a flat computer of an upper machine for controlling motion; and the inside of an electric appliance cabinet (13) is provided with an industrial controller for controlling motion and a motor drive mechanism. The grinding processing equipment has wide speed regulation range, higher moving precision, rapider response speed and strong antijamming capacity, can be better suitable for the requirements of different grinding materials and grinding processes and realizes soft startup, soft shutdown, stable speed regulation and small impact.

The invention relates to a motor vector control method based on a Hall position sensor, comprising the following steps of: giving a target rotating speed, calculating an actual rotating speed of a motor according to a detecting signal of the Hall position sensor, and carrying out proportional-integral adjustment according to the rotating speed difference of the target rotating speed and the actual rotating speed to control the given current; carrying out proportional-integral adjustment according to the given current and the feedback actual current to obtain a needed given voltage value; and calculating a plurality of angle values in one electrical angle period, and carrying out SVPWM (Space Vector Pulse Width Modulation) control according to the calculated angle values and the given voltage value to realize vector control on the motor. In the motor vector control method based on the Hall position sensor, by vector control on the motor, the three-phase output voltage is close to sine wave, and the stable speed adjustment for the motor is realized.

The present invention discloses a fully automatic four-wheel two-core high speed fire extinguishing robot servo controller which comprises a power supply device, an STM32F407 chip, an FPGA chip, a sensing module, an image acquisition module, a three-axis accelerometer sensor, a gyroscope, a direction sensor and a motor assembly. The power supply device is electrically connected to the STM32F407 chip and the FPGA chip. The STM32F407 chip is in communication connection with the FPGA chip and enables the FPGA chip. Through the above mode, the fully automatic four-wheel two-core high speed fire extinguishing robot servo controller is formed through the STM32F407 chip and the FPGA chip and has certain adsorption ability to the ground through a vacuum suction device, the walking skid of a fire extinguishing robot is solve thoroughly, the fully automatic four-wheel low speed fire extinguishing robot servo controller has the advantages of novel structure, simple control, faster speed, space saving, steady speed regulation, strong anti-interference ability and high stability, and the popularity of the controller has a broad market prospect.

The invention discloses a hydraulic control flow valve, which comprises a main valve core and a main valve body, wherein the main valve core is arranged in a main valve sleeve; the main valve sleeve is arranged in a main valve body stepped hole; an oil outlet sleeve is arranged in the main valve body stepped hole below the main valve sleeve; seal rings are arranged between the oil outlet sleeve and the main valve sleeve as well as between the oil outlet sleeve and the main valve body; a sealing member is also arranged between the main valve core and the main valve sleeve; an overflow valve insert and a pressure compensation insert are assembled on the main valve body through threads in a matching way; a cover plate is arranged above the main valve sleeve and is provided with a pressure gauge and an exhaust valve; and seal rings are arranged between the cover plate and the main valve sleeve and at the junction of the cover plate and a main valve body control oil path hole. The hydraulic control flow valve has the advantages of simple structure, convenience in processing, repair and replacement, stable and reliable speed adjustment, good sealing property, simple pipeline connection,small occupied space, convenience in observation and control of pressure and flow, small squeal during work and small jitter of the main valve core. The hydraulic control flow valve is mainly appliedto a drainage system of a liquid cargo ship and the like.

The invention discloses a brushless motor stepless speed change controller based on FPGA digitization control, which solves the technical problem of providing a brushless motor stepless speed change controller based on FPGA digitization control to realize the functions of vibration-free start-stop, reversing, and continuous and stable stepless speed change of the brushless DC motor without the control of a position sensor. Therefore, the invention adopts the technical scheme: the brushless motor stepless speed change controller comprises an EPGA, a motor power driving circuit, a counter electromotive force detecting circuit and two external potentiometers. Compared with the prior art, the invention has the obvious advantage and effect of firstly realizing that a digital chip is used as the controller, and solving the problem of realizing vibration-free start-stop, stable speed control, and the like of the brushless motor in the condition without the position sensor.

The invention discloses a brushless direct current motor rotor position detecting device based on the counter EMF triple frequency harmonic and a phase changing method suitable for the brushless direct current motor rotor position detecting device. The brushless direct current motor rotor position detecting device is composed of a Y-shaped connecting three-phase symmetrical resistance network, a voltage bleeder circuit, a band-pass filtering circuit, a zero passage comparison circuit and an optoelectronic isolation circuit. According to the detecting device, the simulation neutral points are built through the star-shaped three-phase symmetrical resistance network, the counter EMF triple frequency harmonic component is extracted from the simulation neutral points, zero passage signals of the counter EMF triple frequency harmonic component are obtained by comparing the counter EMF triple frequency harmonic component with the grounding end, and a microprocessor calculates the zero passage time of the three-phase counter EMF of a brushless direct current motor according to the two times of zero passage signals of the detecting device and the last action time of a switch tube and controls the phase changing according to the zero passage time. By means of the detecting method, the number of components of the rotor position detecting device can be reduced, and the reliability of detecting can be improved.

The invention discloses an electric wheelchair control system based on fuzzy PID control. Aiming at problems that different road conditions and uphill and downhill environments cause the jolting, instability, unsafety and discomfort of an electric wheelchair, the system meets the requirements of the disabled on wheelchairs for safety, comfortableness and operability. The system is characterized in that the system comprises an environment sensing system, a main control system, a drive system, an actuator, and a feedback system; and the system employs the electric wheelchair control system based on fuzzy PID control. The main control system designs a fuzzy PID control system according to the rotating speed deviation, fed back by the feedback system and a calculated deviation change rate, adjusts a self-setting fuzzy control strategy of three parameters of PID, and achieves the better control of an output speed. The system is good in robustness, is small in overshoot, is smooth in speed regulation, is good in resistance to load disturbance, and meets the control requirements of the electric wheelchair under different road conditions.

The invention discloses a stirrer with high stirring strength and high shearing force. The stirrer comprises a barrel, a permanent magnetic direct-drive motor, an equipped variable-frequency speed adjuster, a shearing force stirring paddle, a barrel internal shearing force guide plate, a barrel top anti-splashing baffle plate, a fixed support, a feeding port and a discharging port. Compared with the existing stirring device, the stirring paddle, the guide plate and the guide plate with strong shear force and the permanent magnetic direct-drive motor with large torque are simultaneously utilized, so that the stirrer has the advantages of high stirring strength and strong shear force; meanwhile, the energy consumption and repairing cost of the stirring equipment can be reduced.

The invention discloses a low-noise and energy-saving air cleaner and a working method thereof, and relates to an air cleaner and a working method thereof. Currently, the air cleaner has low motor efficiency, obvious noise and large motor power consumption, is inconvenient to use and can affect the rest of a user because an alternating current motor is used and a relay is adopted to control a motor tap for speed adjustment. The low-noise and energy-saving air cleaner comprises a control system and an execution device and is characterized in that the control system comprises a sampling module,a signal receiving module, a control module, a motor driving module, a switch power supply and a manual controller; the sampling module, the signal receiving module and the motor driving module are all connected with the control module; the manual controller is a movable-type manual controller; a wireless sending module is arranged on the manual controller; the motor is a direct current brushlessmotor; a rotation speed feedback module is arranged on the motor; and the direct current brushless motor is connected with the control module through a motor driving module. The low-noise and energy-saving air cleaner has the advantages of wide application ranges, low noise, good comfort degree, stepless speed change and stable speed adjustment.

The invention discloses a water taking and pressurizing control system of a solar sprinkler. The system comprises a solar photovoltaic power generating module, a direct-current brushless motor control circuit and a water source constant water level automatic water replenishing control circuit. The solar photovoltaic power generating module respectively powers the direct-current brushless motor control circuit and the water source constant water level automatic water replenishing control circuit. The direct-current brushless motor control circuit controls the power supply of a water pump. The control system has the advantages that the system uses clean solar energy to supply power, wireless control is used, convenient operation is achieved, remote on and off control of units is achieved, remote transmission indication and alarming of a system fault state unit can be achieved, a high-performance brushless direct-current motor is used to drive a self-priming pump, high system reliability and low energy loss are achieved, the water pump is started in a convenient and labor saving manner, automatic irrigation can be achieved conveniently, universality and flexibility of sprinkling irrigation units are increased effectively, and the irrigation requirements of farms, pastures, crops, economical crops and forage grass are satisfied.

The invention discloses an engineering machinery walking speed controlling and switching valve. Oil inlet channels and oil outlet channels of two motors are formed in the same one valve body. By means of the switching valve structure design and the system matching design, the speed can be switched and adjusted on the work condition where an actuating device can normally work and is not shut down. Thus, a speed regulating range of engineering machinery hydraulic speed control is widened, and stepless speed change is achieved. The engineering machinery walking speed controlling and switching valve is simple in engineering machinery speed switching opening, stable in speed switching, free of impact in speed switching and capable of prolonging the service life of a hydraulic system. The engineering machinery walking speed controlling and switching valve integrates a serial connection function and a parallel connection function of a hydraulic motor system, so that the integration level is high. Meanwhile, a safety valve can be integrated on the switching valve to achieve a safety protection function of a system work circuit.

The invention discloses a solar-driven sprinkling irrigation machine traction device. The solar-driven sprinkling irrigation machine traction device comprises a frame and travelling wheels installed at the bottom of the frame. An electromotor is installed on the frame, and drives a steel wire rope drum to rotate through a speed reducer, the steel wire rope drum is installed on the frame, and connected with a wire arranging device through a linkage device, and a steel wire rope is wound around the steel wire rope drum; when the steel wire rope drum rotates, the steel wire rope is evenly wound around the steel wire rope drum through the wire arranging device; electricity of the electromotor is provided by a solar photovoltaic power generation system installed on the frame. The solar-driven sprinkling irrigation machine traction device further comprises a control system, wherein the rotating speed of the steel wire rope drum can be adjusted automatically or manually through the control system. Compared with a conventional traction mode, the solar-driven sprinkling irrigation machine traction device has the advantages that damage to crops in a large area in the tractor traction process is effectively avoided, solar energy serves as power, traction at a constant speed is achieved, energy saving and environmental protection are achieved, the structure is simple, operation is convenient, the discontinuous load is low, and popularization and development of a reel sprinkling irrigation machine are facilitated.

The invention discloses an air conditioner-based speed regulation method and speed regulation system for a PG motor and an air conditioner. The method comprises the steps as follows: a sine wave period corresponding to the rotating speed of the PG motor is averagely divided into 2C parts; each part is averagely divided into N intervals according to the area; the rotating speeds in the N intervals and corresponding coordinate values are stored into an array list, wherein C is 1 or 2; N is a natural number; the current rotating speed of the PG motor is detected and compared with the preset target rotating speed to obtain a rotating speed difference value between the current rotating speed and the target rotating speed; a data table is inquired to determine the coordinate value corresponding to the current rotating speed; the regulating quantity of the current rotating speed is obtained according to the rotating speed difference value; and the current rotating speed of the PG motor is regulated according to the regulating quantity. By an equal-voltage speed regulation mode, the rotating speed regulation is relatively stable; the probability of abnormal noise or abnormal performance caused by rotating speed fluctuation is lowered; and the service lifetime of the PG motor is prolonged.

The invention relates to an oil cooler of a traction transformer of an electric motor unit, which comprises two heat exchangers, two air inlet boxes and a fan box, wherein the two heat exchangers are respectively connected with the two air inlet boxes; the fan box is arranged between the two air inlet boxes. The fan box is formed by sheathing an upper casing and a lower casing. Both two installation ends of the upper casing are fixed on the side surface of the air inlet box, and both ends of the lower casing are fixed on the bottom surface of the air inlet box. The lower casing is provided with an air exhaust opening. A motor bracket is fixed on and connected with the lower part of the upper casing. A two-speed dual-axle variable-frequency motor is hung on the motor bracket. Two main shafts of the two-speed dual-axle variable-frequency motor are respectively provided with an impeller. The air inlet boxes are fixed on and connected with the two ends of the motor bracket. Both ends of the motor bracket are provided with horn-shaped air inlets. The impellers, the air inlets and air inlet holes are oppositely arranged. The cooler adopts a split structure, therefore the assembly and maintenance are convenient; the two-speed dual-axle variable-frequency motor has wide power varying range, the traction transformer with wide power varying range in the electric motor unit can be cooled, and the cooling effect is good.

The invention relate to an energy-saving system of a cooling air hose of a glass annealing kiln and a cooling method of a glass tape. Each pipeline is equipped with a draught fan which is provided with a frequency converter, and the frequency converters are freely controlled by an industrial personal computer to reaching the purpose of adjusting the rotating speed of the draught fans, so that each branch air hose is more convenient to control. The size of the cooling air amount of each branch air hose can be conveniently adjusted according to the temperature adjusting demands of glass plates in different regions, so that the temperatures in each region in the annealing kiln is reasonable and the best glass annealing effect is achieved. The equipment investment is reduced, the pipeline system is simplified, the energy utilization rate of the manufacturer is greatly improved and the electric energy consumption of the ventilating system of the annealing kiln is reduced, so that the effect of saving energy and protecting the environment is realized.

The invention discloses a crushing and screening device for materials. The crushing and screening device is characterized by comprising a charge device, a crushing device and a screening device, wherein the charge device is communicated with a shell; the crushing device is arranged in the shell, and provided with a filter screen at the periphery; and the screening device is located below the crushing device. Preferably, the materials are alloy sheets; the charge device comprises a charge nozzle and a loop from the filter screen to the charge nozzle; an inert gas inlet is arranged in the top of the charge nozzle and the bottom of a stainless steel elbow pipe respectively; the crushing device is provided with a drive motor; the screening device is provided with a vibration motor; the drive motor is a special frequency conversion motor; and the special frequency conversion motor is controlled by a frequency converter. The crushing and screening device disclosed by the invention is simple in structure, simple and convenient to operate overall, stable and reliable in running, low in noise, less in raising dust, good in field environment, and capable of effectively preventing frictional sparking generated by ultrafine powder grains with a pipe wall during a high-speed rotation process, thus safety performance is greatly improved.

The invention discloses a single-pump and single-motor closed type hydraulic system for a travelling mechanism of a land leveler. The single-pump and single-motor closed type hydraulic system comprises a hydraulic pump and a hydraulic motor. An outlet A of the hydraulic pump is communicated with an inlet C of the hydraulic motor, and an outlet B of the hydraulic pump is communicated with an inlet D of the hydraulic motor. A first one-way relief valve and a second one-way relief valve which are oppositely arranged are connected between the outlet A and the outlet B of the hydraulic pump in parallel. The outlet A of the hydraulic pump is communicated with a port P of an electromagnetic reversing valve. The outlet B of the hydraulic pump is communicated with a port Q of the electromagnetic reversing valve. A port R of the electromagnetic reversing valve is communicated with an inlet of a pilot operated compound relief valve, and an outlet of the pilot operated compound relief valve is communicated with an oil tank. The single-pump and single-motor closed type hydraulic system has the advantages of simplicity and compactness in structure, stability in speed regulation and braking, low impact, long service life, high power utilization rate, low energy consumption, convenience in arrangement, low cost and convenience in popularization and application.

The invention discloses an accumulator disc type electric locomotive. The electric locomotive comprises a frame, wherein one end of the frame is provided with a cab; an accumulator is arranged at the upper part of the frame; a walking device is mounted at the bottom of the frame, and is connected with a guiding plate bracket of the frame through bearing boxes at two ends; the walking device comprises one pair of wheels mounted on two sides of the frame, wheel shafts, bearing boxes at two ends of a locomotive shaft, gearboxes at the middle parts of the wheels, elastic couplings and disc type direct current brushless traction motors; the wheel shafts are connected with the output ends of the gearboxes; power input shafts of the gearboxes are connected with output shafts of the disc type direct current brushless traction motors through the elastic couplings; the disc type direct current brushless traction motors are connected to a direct current variable frequency speed regulator through signal transmission wires. Compared with the alternating current variable frequency locomotive vehicle promoted and applied at present, the accumulator disc type electric locomotive has the characteristics of large output torque, smoothness in speed regulation, quickness in electric braking response, short braking distance, high safety, no harmonic wave disturbance and low fault rate.

The invention discloses a glass fiber warping machine. The glass fiber warping machine comprises a machine frame, a motor and an electric appliance control cabinet, wherein a winding reel is arranged above the machine frame and is in cup joint onto a winding shaft, the two ends of the winding shaft are fixedly arranged on the machine frame through a bearing seat, and a roller device is arranged below the winding reel and is fixed on the machine frame through a support; the roller device comprises upper compression rollers and lower compression rollers, and the upper compression rollers are positioned above the lower compression rollers; a dent base is arranged below the roller device on the machine frame, and a plurality of dividing reeds are arranged on the dent base. When the glass fiber warping machine works, glass fibers come out from the winding reel, are wound on a roller barrel after passing through the roller device, the dividing reeds and a wire guide frame, and cannot wind together, so that the tension is balanced, and the production efficiency is high; moreover, the glass fiber warping machine is provided with the electric appliance control cabinet, so that the machine runs more smoothly, the speed regulation is stable, electricity and energy are saved, and the failure rate is low.

The invention discloses a closed hydraulic control system for a travelling mechanism of a construction vehicle. The system comprises a hydraulic pump and a hydraulic motor, wherein the hydraulic pump is a variable hydraulic pump, and while the hydraulic motor is a variable motor which is connected in series with the variable hydraulic pump; a first one-way overflowing valve and a second one-way overflowing valve which are oppositely arranged are connected in series between two liquid outlets of the variable hydraulic pump; two liquid outlets of the variable hydraulic pump are respectively communicated with a first working oil port and a second working oil port of a control valve; a third working oil port of the control valve is connected with an inlet of a pilot type overflowing valve; an outlet of the pilot type overflowing valve is communicated with an oil tank. The system has the characteristics that the closed system is adopted, the structure is simple and compact, the speed governing and braking are relatively smooth, the impact is reduced, the service life is long, the power utilization rate is raised, the energy consumption is lowered down, the arrangement is convenient, the cost is reduced, and the popularization and use are convenient.

The invention discloses a double-pump and double-motor closed type hydraulic system for a travelling mechanism of a land leveler. An outlet A of a first hydraulic pump, an outlet E of a second hydraulic pump, an inlet C of a first hydraulic motor and an inlet G of a second hydraulic motor are mutually communicated. An outlet B of the first hydraulic pump, an outlet F of the second hydraulic pump, an inlet D of the first hydraulic motor and an inlet H of the second hydraulic motor are mutually communicated. A first one-way relief valve and a second one-way relief valve are connected between the outlet A and the outlet B of the first hydraulic pump in parallel. A first flushing valve is connected between the inlet C and the inlet D of the first hydraulic motor in parallel. A third one-way relief valve and a fourth one-way relief valve are parallelly connected between the outlet E and the outlet F of the second hydraulic pump. A second flushing valve is connected between the inlet G and the inlet H of the second hydraulic motor in parallel. The double-pump and double-motor closed type hydraulic system has the advantages of simplicity and compactness in structure, stability in speed regulation and braking, low impact, high power utilization rate, low energy consumption, convenience in arrangement, low cost and convenience in popularization and application.

The invention provides a frequency conversion, speed regulation and comprehensive electrical control system for an electric locomotive. The control system comprises a control electrical collection plate, a main cavity assembling member, a frequency conversion combiner, a driver controlled operating system assembly, a main cover plate assembling member, a power supply collection plate and an auxiliary driver controller. The control system is applicable to frequency conversion, speed regulation and comprehensive electrical control of an underground coal mine storage battery locomotive and comprises inverted frequency conversion and speed regulation, driver control, comprehensive monitoring of storage batteries, pressure and temperature control of air compressors, speed detection control, gas monitoring control and comprehensive control of locomotive lamps, loudspeakers and the like. The control system is small in volume, high in integration degree, safe and reliable, and simple to operate.

The invention relates to a permanent magnetic coupling adjustable-speed motor comprising a shell (1), an output shaft (2), a control structure (3), a power-driven structure and a speed adjustment structure, wherein the power-driven structure comprises an electric rotor (5) and a stator (4) arranged on the inner wall of the shell, the speed adjustment structure comprises a winding rotor (6) and a permanent magnetic rotor (7), magnetic fields of the stator and the electric rotor interact with each other to transmit the torque, and magnetic fields of the winding rotor and the permanent magnetic rotor interact with each other to transmit the torque; one of the winding rotor and the permanent magnetic rotor is fixedly connected with the electric rotor, while the other one is fixedly connected with the output shaft; the control structure is electrically connected with the winding rotor, and adjusts current or voltage of the winding rotor. The permanent magnetic coupling adjustable-speed motor can operate efficiently, is smooth in speed adjustment, large in speed adjustment range, hard in rigidity and short in axial size, and has the capacity of riding through low voltage.

The invention discloses a thrust type CVT (continuously variable transmission) with a transmission ratio of 5-15 for a new energy electric vehicle, which is characterized in that two or more driving push wheels driven by a motor are uniformly arranged around an output cone pulley, and working cone rings on two sides of the driving push wheels are respectively in tangent contact with the output cone pulley and keep certain radial pressure; the driving push wheel revolves around the output cone pulley but does not rotate to push the output cone pulley to rotate, the rotating speed of the output cone pulley is changed by changing the radial position where a working cone ring of the driving push wheel is tangent to the output cone pulley, stepless speed regulation is achieved, and the diameter of the working cone ring of the driving push wheel is 1 / 15 of the diameter of the output cone pulley under the reasonable size. And 5-15 wide-range transmission ratio change is realized through the planetary gear output mechanism, so that the torque is increased, the rotating speed of the motor is kept in an efficient and reasonable region in the whole working condition range, the power is not interrupted in the speed change process, the speed regulation is stable without gear shifting pause, the rotating speed of the motor is reduced, the energy consumption is reduced, the endurance mileage is prolonged, and the high-speed cruise capability is improved.

The invention provides a cruise control method and system for a vehicle and the vehicle. The method comprises the following steps that current vehicle speed, the cruise target vehicle speed of the vehicle and slope information of a road in front of the vehicle are obtained; the cruise torque of the vehicle is obtained according to the current vehicle speed and the cruise target vehicle speed of the vehicle; before the vehicle reaches the slope of a front road, the cruise torque is adjusted according to the slope information; and cruise control is conducted on the vehicle according to the adjusted torque, so that the cruise torque is adjusted in advance in combination with the current vehicle speed, the cruise target vehicle speed of the vehicle and the slope information of the road in front of the vehicle, it can be guaranteed that the cruise vehicle can stably adjust the vehicle speed when the road slope changes, and the driving stability and comfort of the vehicle are improved.

The invention relates to the technical field of intermediate-speed diesels, in particular to a fluid dual-fuel intermediate-speed diesel system and a speed regulation control method thereof. The fluiddual-fuel intermediate-speed diesel system comprises a micro-computer, a diesel oil supply and control loop and a methyl alcohol supply and control loop, the micro-computer is connected with the diesel oil supply and control loop and the methyl alcohol supply and control loop separately, and the diesel oil supply and control loop and the methyl alcohol supply and control loop are independent of each other. According to the fluid dual-fuel intermediate-speed diesel system, methyl alcohol is adopted as a fluid fuel and can be stored and added at the normal temperature and normal pressure, the system is convenient to use, and leakage does not easily occur. The flash point of the methyl alcohol is about 10 DEG C and is far higher than that of gas fuel, and therefore the system is safer. The rotation speed and output power of an engine controlled through the speed regulation control method during work are stable, and the speed regulation process is stable.

The invention discloses a hanging cup type planting device driving system based on a DC brushless motor. A planting device is used for hole punching and seeding planting work in seeding transplanting. The hanging cup planting device based on the DC brushless motor comprises a controller module, a driver module, a storage battery power supply module, the DC brushless motor, a feedback module, a decelerator, a transmission mechanism and a hanging cup transplanting mechanism. The transmission mechanism transmits power and drives a crank rocker mechanism to move, and the put-in pot seeding is carried by a hanging cup when the crank rocker mechanism moves to the highest point; and soil dusting and hole punching are performed by the hanging cup when the crank rocker mechanism moves to the lowest point, and the pot seeding is put in the hole so that seeding planting work is completed. A driving control part is mainly composed of the controller, the DC brushless motor, the driver and the feedback module. The driving system can accurately control movement of the hanging cup via high-precision closed-loop control of motor speed and torque. According to the driving system, the hanging cup can be driven to stably complete planting movement according to the specific movement characteristics so that seeding planting frequency and reliability can be enhanced and short-planting-distance close transplanting work can be realized.

The invention discloses a novel discrete automatic magnetism-adjusting and speed-adjusting motor stator structure, which comprises a stator, a winding, fixed baffle plates and rotating devices with contact pointers; the rotating devices with the contact pointers are respectively arranged in the stator slots of the phases A, B and C, and the fixed baffle plates are respectively arranged in the corresponding stator slots; each rotating device with the contact pointer comprises a pointer with a spherical contact structure, an induction copper sheet, a spring and a rotating shaft, and the rotating shaft is rotationally connected to each fixed baffle plate; each induction copper sheet is fixed on the rotating shaft; one end of the pointer is connected to the rotating shaft, the pointer is parallel to the stator end face, and the other end of the pointer is of a spherical contact structure and makes contact with the winding. When the motor does not run, the spring does not deform and has no elasticity; when the motor operates, the induction copper sheets can generate electromagnetic forces, when the electromagnetic forces are larger than elastic forces, the rotating shafts drives the pointers to swing clockwise, and when the electromagnetic forces are smaller than the elastic forces, the rotating shafts drive the pointers to swing anticlockwise, so that effective turns of the winding are automatically changed, and magnetic flux is adjusted.