16 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.

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 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 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 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 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.

The application discloses a kind of rubber magnetic strip's permanent magnet DC brushless outer rotor motor, including outer rotor assembly, stator assembly, control circuit board, the outer rotor assembly includes magnetic ring and the transmission shell of setting in the magnetic ring outside, the magnetic ring is by rectangular parallelepiped rubber magnetic strip and is made into circular ring by deformation, the end face of the rubber magnetic strip one end forms first inclined plane, the end face of the rubber magnetic strip other end forms second inclined plane, so that motor air gap is adjacent to magnetic field intensity greater than outer ring surface magnetic field intensity, improve effective magnetic energy product, improve weak magnetic performance into medium magnetic performance, satisfy motor work demand;The first inclined plane and the second inclined plane of the magnetic ring ring body made of the rubber magnetic strip are oppositely arranged to form inclined pole gap, and the design of inclined pole gap can weaken total tooth harmonic strength, and have certain noise reduction effect.

The utility model discloses a permanent magnet direct current motor, which relates to the technical field of permanent magnet direct current motors and comprises a stator yoke, a permanent magnet is arranged in the stator yoke, a rotor iron core is further rotatably mounted in the stator yoke, a plurality of iron core grooves are arranged on the rotor iron core, and the number of the iron core grooves is eight. The eight iron core grooves are formed in the periphery of the rotor iron core at equal intervals, the number of the permanent magnets is two, the two permanent magnets are symmetrically installed on the inner side wall of the stator yoke, and the rotor iron core is located between the two permanent magnets; according to the permanent magnet direct current motor, skewed slots, skewed poles, rotor notch width reduction and inner and outer circle non-concentric magnets are not needed, only the pole-arc coefficient of the magnets needs to be selected to be 0.75-0.8, the permanent magnet direct current motor has the advantages of being small in cogging torque, electromagnetic vibration and electromagnetic noise and high in mechanical performance, especially when the pole-arc coefficient is 0.75, the cogging torque is close to 0, the cost performance is high, and the permanent magnet direct current motor is suitable for large-scale popularization and application. And the quality and economic benefits are obvious.

This invention relates to the field of micro-motors, specifically a micro-motor capable of high-precision reciprocating transmission. It comprises a motor base and a rotor housed within the motor base. A ring-shaped permanent magnet is fixedly sleeved on the rotor and movably disposed within a coil frame. A high-temperature armature winding is wound on the coil frame, and one end of the coil frame has terminals connected to both ends of the high-temperature armature winding. Both ends of the rotor are rotatably connected to the coil frame via bushings. The motor base has a receiving chamber, within which a ring-shaped magnetic yoke is fixedly disposed. Compared to conventional continuous rotating motor mechanical transmission mechanisms, this invention offers stronger environmental adaptability, smaller size, lower power consumption, greater output torque, stronger anti-interference capability, higher reliability, easier processing, and lower cost.

1. The name of the design product: permanent magnet brushless DC motor. 2. The use of the design product: used as a brushless motor. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.