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 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 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 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 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 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 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 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 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.