7938results about "Structural association" patented technology

The present invention particularly relates to the field of permanent-magnet electric motors. Disclosed is a permanent-magnet synchronous electric motor with an externally mounted explosion-proof mechanism. The permanent-magnet synchronous electric motor comprises an enclosure, wherein the interior of an explosion-proof housing is divided into a first cavity and a second cavity by means of a first partition plate; auxiliary heat-dissipation fan blades are provided inside the first cavity, and the auxiliary heat-dissipation fan blades are fixedly arranged on a support shaft; the support shaft is in splined connection with an output shaft inside the enclosure; a heat-dissipation explosion-proof mechanism is provided inside the second cavity; and a high temperature display mechanism is provided on a side wall of an outer end of the explosion-proof housing. In the present invention, heat in the explosion-proof housing can be transmitted to sodium bicarbonate particles, and the sodium bicarbonate particles decompose under heat and can absorb heat when decomposing, thereby increasing the heat-dissipation efficiency of the enclosure; when an explosion occurs inside the enclosure, the air pressure and temperature inside the enclosure rapidly increase, and the air pressure can enter the explosion-proof housing and be relieved by means of heat-dissipation holes; in addition, an explosion-proof buffering airbag can play a role in buffering to achieve an explosion buffering function.

A hard start capacitor replacement unit includes a capacitor container having a cover, a plurality of capacitors received within the container, each of said capacitors having a capacitance value, a common terminal mounted on the cover and electrically connected to a common terminal of each of said plurality of capacitors, a plurality of cover terminals mounted on the cover spaced apart from the common terminal and from each other, each cover terminal respectively electrically connected to one of the plurality of capacitors, a relay having contacts and being capable of opening and closing said contacts in response to a monitored condition of the motor, the relay having relay terminals, a fuse electrically connected to one of the relay terminals by a first wire wherein the fuse electrically disconnects the hard start capacitor replacement unit and the motor upon a failure, and a second wire electrically connecting one of the relay terminals and the motor, a third wire electrically connecting the common terminal and one of the relay terminals, a fourth wire electrically connecting one or more cover terminals to one of the relay terminals, wherein the contacts of the relay close to electrically connect one or more capacitors of the plurality of capacitors to the motor, and the contacts of the relay open to electrically disconnect the one or more capacitors of the plurality of capacitors from the motor.

The invention relates to an air blower based on magnetic and gas combination axial force balance and a control method of the air blower, and belongs to the technical field of axial force regulation and control of air blowers. An axial air suspension bearing and an axial magnetic bearing are arranged in a main machine of the air blower, the axial magnetic bearing is connected with a magnetic bearing controller, and the magnetic bearing controller controls the axial position of a rotor by controlling the current of the axial magnetic bearing; an axial displacement sensor and a radial displacement sensor are arranged to detect the displacement of the rotor; and the main controller is used for controlling the starting and stopping of the axial magnetic bearing and the main machine based on the axial displacement and the radial displacement of the rotor, and sending out early warning. According to the magnetic and air combined axial force balance device, the axial magnetic bearing is used for providing active control force, the air bearing is used for providing passive support, the stability and reliability of a system are improved, and an important protection effect is achieved on core parts of an air blower.

The invention relates to the technical field of new energy automobile generator performance detection, and discloses an automobile generator performance detection method and device. The method comprises the steps of collecting working condition data such as voltage, current, rotating speed and internal temperature of a generator in real time through a multi-source sensor, establishing a correlation model among the voltage, the current, the rotating speed and the internal temperature based on a regression analysis method, and dynamically adjusting safety thresholds of the voltage and the current according to the model. Compared with the prior art that monitoring depends on a fixed threshold value, especially under complex working conditions such as high load, rapid acceleration and high temperature conditions, the technical problem that working condition changes cannot be adapted in real time is solved, real-time monitoring is achieved by dynamically adjusting the voltage and current threshold values and combining the rotating speed and the internal temperature change rate, and the real-time monitoring efficiency is improved. The stable operation of the generator under the multi-dimensional working condition is ensured, so that the problem of equipment damage caused by overload is avoided, the safety of the system is improved, and the service life of the system is prolonged.

Disclosed are a racing simulation device and algorithm based on a high precision and high response torque closed loop. The racing simulation device includes a quick release module, a motor module, a sensing module and a sleeve. One end of the motor module is connected to the sensing module; a connecting seat is disposed at one end of the sleeve, one end of the connecting seat is connected to the sleeve, and the other end of the connecting seat is disposed inside the quick release module; one end of the quick release module is connected to a steering wheel; the torque closed loop adopts incremental PI adjustment output, which is accumulated with torque feedforward to output a given current, and current amplitude is limited, so an entire torque is closed to form a double-closed-loop form in combination with a current closed loop, and torque precision control is further improved.

The invention provides an anti-shake motor which can improve the accuracy of real-time position detection of a rotor. In the anti-shake motor, a first mover is arranged above a base, a second mover is arranged above the first mover, and a circuit board comprises a first polar plate and two second polar plates; the first part of the first floating polar plate and the first polar plate form a first sub-capacitor; the fourth part of the second floating polar plate and the second part of the first floating polar plate form a second sub-capacitor; the eighth part of the third floating polar plate and the fifth part of the second floating polar plate form a third sub-capacitor, and the seventh part of the third floating polar plate and the second polar plate form a fourth sub-capacitor; the capacitor between the first pole plate and any second pole plate is formed by connecting a first sub-capacitor, a second sub-capacitor, a third sub-capacitor and a fourth sub-capacitor in series, and the capacitance values of the first sub-capacitor, the second sub-capacitor and the fourth sub-capacitor are not changed when the second mover reciprocates along the second direction relative to the first mover; and the capacitance value of the third sub-capacitor is changed.

The invention discloses a flexible mechanical arm driving system for minimally invasive interventional surgery, a flexible mechanical arm comprises a hollow first sleeve assembly which is coaxially configured, the first sleeve assembly comprises an inner tube and an outer tube, the inner tube and the outer tube are thin-walled tubes, the inner tube is arranged in the outer tube in a penetrating manner, and the inner tube and the outer tube are fixedly connected at the far end part; the inner tube and the outer tube are each provided with a straight tube section at the near end and a deformation section at the far end, and the deformation sections can be bent and deformed when the inner tube is pushed / pulled. The driving system comprises an instrument assembly and a driving module assembly; a driving driven module is arranged in the instrument assembly, and the flexible mechanical arm is connected with the driving driven module; a driving driving module and a PCB control board are arranged in the driving module assembly, the driving driving module is in transmission connection with the driving driven module, and the driving module assembly is used for driving the flexible mechanical arm to do linear, rotating and bending movement. The driving device is used for driving the coaxial antagonism tubular flexible mechanical arm to achieve bending, rotating and linear motion, full-automatic control can be achieved, and the control accuracy and safety are high.

The invention relates to an electric machine with at least one winding (12) by means of which a magnetic field can be generated, and with a sensor device (22) by means of which the magnetic field can be detected, wherein the sensor device (22) comprises at least one circuit board (24) which has several circuit board sections (26) spaced at least partially apart from one another in the circumferential direction (36) of the electric machine, between which respective length sections (L) of the winding (12) are arranged. The sensor device (22) comprises sensor elements (28) held on the circuit board (24) by means of which the magnetic field can be detected, wherein at least two of the sensor elements (28) differ from one another in their measuring principles for detecting the magnetic field.

The invention belongs to the technical field of joint motors, and particularly relates to a robot joint motor assembly and a motor. The robot joint motor assembly comprises a protective shell and a hollow shaft, a rotor assembly and a stator are arranged in the protective shell, an output flange is fixedly connected to one end of the hollow shaft, a clamping spring is arranged at one end of the hollow shaft, and a fixing plate is fixedly connected to the side, away from the output flange, of the protective shell; and a heat removal assembly and a protection assembly are arranged in the protection shell. According to the robot joint motor assembly, through cooperative use of the rotor assembly, the Z-shaped part and the first rotating wheel, when the robot joint motor assembly is used, the blades can rotate around the central axis of the hollow shaft, airflow flowing in the protective shell is accelerated, heat dissipation of heat in the protective shell is accelerated, and meanwhile in the rotating process of the frame body, the blades can rotate around the central axis of the hollow shaft; the original positions and angles of the blades are correspondingly changed, the guiding effect of the blades on airflow is optimized, and the heat dissipation effect of heat in the protective shell is improved.

The invention provides an eddy current sensor, a detection device and an electric driving system, and the sensor comprises an eddy current rotor, one end of which is connected with a rotating shaft of a to-be-detected motor and rotates synchronously; one end of the printed circuit board assembly is an electromagnetic induction area, the exciting coil and the receiving coil are arranged in the electromagnetic induction area, the receiving coil is distributed on the inner side of the exciting coil, the other end of the eddy current rotor is close to the electromagnetic induction area to form a preset air gap distance, and the eddy current control module is arranged at the other end of the printed circuit board assembly. The eddy current control module is connected with the excitation coil to form a high-frequency oscillation magnetic field and is connected with the receiving coil to receive the induced electromotive force. The design is compact, the size is greatly reduced, light weight is achieved, and the installation space and the manufacturing cost are reduced.

The utility model belongs to the technical field of mechanical transmission, and particularly relates to an electric cylinder with a built-in force sensor, which comprises a lead screw assembly, a force sensor assembly and a force sensor assembly, the lead screw assembly comprises a nut and a screw rod, and the nut is movably sleeved on the outer side of the screw rod; the piston rod is fixedly connected with the nut; the bearing seat is arranged on the screw rod in a sleeving mode, the front end and the rear end of the bearing seat in the axial direction are connected with first bearings correspondingly, and the first bearings are connected with the screw rod; and the force sensor is arranged on the screw rod in a sleeving manner, and the force sensor is connected with the bearing seat. The axial tension and the axial pressure from the screw rod are transmitted to the bearing seat through the two first bearings respectively, and then the tension and the pressure are transmitted to the force sensor through the bearing seat respectively, so that output of pressure signals and pressure signals is realized.

The utility model provides a compensation device based on a magnetic suspension motor and an eddy current displacement sensor, which belongs to the technical field of magnetic suspension motor unbalanced signal extraction and suppression and comprises a differential eddy current displacement sensor, a nonlinear compensation circuit, a digital signal processor, an eddy current effect compensation circuit and an upper computer. The differential eddy current displacement sensor is used for acquiring displacement information and rotor temperature of a rotor of the magnetic suspension motor, and temperature compensation is carried out on the displacement information of the rotor by adopting a temperature compensation circuit built in the differential eddy current displacement sensor according to a temperature compensation control signal of the upper computer; and the upper computer is used for correspondingly obtaining a resistance value of a variable resistor Rt in the temperature compensation circuit according to the rotor temperature and the environment temperature when receiving the rotor temperature, and sending a temperature compensation control signal to the differential eddy current displacement sensor according to the resistance value of the variable resistor Rt. According to the invention, the accuracy of signal acquisition under complex conditions is ensured.

The invention relates to a method for determining the rotor current of a separately excited synchronous machine (FSM), comprising a stator and a rotor with an excitation winding. Initially, an excitation supply voltage is connected via a controlled bridge circuit to terminals A and B of an inductive transformer. On the secondary side, this transformer is connected to the excitation winding of the FSM via a rectifier. The controlled bridge circuit can be regulated via switching parameters using a control unit. Subsequently, the primary current of the excitation winding of the FSM is sampled at terminals A and B. Then, an evaluation time for the sampled primary current is determined, and the primary current is evaluated at that time. The evaluated primary current is then converted to the rotor current. Finally, the rotor current at the evaluation time is output.

The present application relates to the field of beam scanning technology and provides a galvanometer motor and a LiDAR. The galvanometer motor includes a stator assembly, a rotor assembly, a tunneling magnetoresistance sensor, a first magnet, and a second magnet. The stator assembly includes a housing and a stator body, while the rotor assembly includes a rotating shaft, a rotor magnet, and an angle limiting member. The rotating shaft is rotatably mounted in the housing around a first shaft line, with a gap between the rotor magnet and the stator body. The rotor magnet rotates around the first shaft line under the magnetic field of the stator body. The tunneling magnetoresistance sensor can map the limited angles formed by the first angle and the second angle into finite position codes.

The invention discloses a superconductive synchronous phase modifier rotor adaptive dynamic balance compensation device and method, and relates to the technical field of superconductive synchronous phase modifiers, the superconductive synchronous phase modifier rotor adaptive dynamic balance compensation device comprises a rotor, the rotor is fixedly connected with a rotating shaft, and a plurality of vibration signal capture sensors are uniformly distributed on the side surface of the rotor and used for monitoring the vibration condition of each point in the circumferential direction of the rotor in real time; a gravity center compensation mechanism is further installed on the side face of the rotor and used for correcting the dynamic unbalance situation generated in the rotating process of the rotor in real time. When a certain vibration signal capture sensor on a rotor monitors that a dynamic unbalance condition occurs at a corresponding point, a sealing push plate in a balance box body at a corresponding position pushes out balance liquid stored in the balance box body through a communicating pipe, and the sealing push plates in the oppositely arranged balance box bodies move to a position far away from the communicating pipe; and the spaces, communicated with the communicating pipes, in the opposite balancing box bodies are filled with the pushed balancing liquid, so that the adjustment and compensation of the gravity center distribution of the rotor are completed.

The invention, which relates to the technical field of the motor, discloses a variable-frequency and variable-speed permanent magnet motor of a stator core heat dissipation structure without a casing, comprising a stator core, an end cover, a motor shaft, a rotor, an axial fan, a heat dissipation channel, a spacer ring, a heat dissipation port, a protective cover, a baffle plate and a mounting seat, the baffle plate is provided with a communication port corresponding to a mounting cavity and the heat dissipation port; the low-temperature shrinkage stress prevention assembly is mounted on the baffle and used for driving the baffle to rotate, so that the opening part of the heat dissipation opening is opened and closed; and the air flow adjusting assembly is arranged on the mounting seat and is used for adjusting the air flow in the heat dissipation channel based on the rotating speed of the motor shaft. According to the invention, the air flow adjusting assembly is used for adjusting the air flow rate in the heat dissipation channel when the rotating speed of the motor shaft changes, so that the air flow rate in the heat dissipation channel is increased when the rotating speed of the motor shaft is reduced, and thus the air flow rate in the heat dissipation channel is relatively high when the rotating speed of the motor shaft is reduced; and therefore, the influence on the gas flowing effect is small.

An electric generator according to the present technology includes a coil element. The coil element includes a magnetic core and two or more windings. The magnetic core causes a magnetic flux change in an axial direction. The two or more windings that are each helically wound around the magnetic core in such a manner that each of the two or more windings is adjacent to the other winding in the axial direction of the magnetic core and are independent windings each capable of being electrically separated from the other winding.

A hard start capacitor replacement unit includes a capacitor container having a cover, a plurality of capacitors received within the container, each of said capacitors having a capacitance value, a common terminal mounted on the cover and electrically connected to a common terminal of each of said plurality of capacitors, a plurality of cover terminals mounted on the cover spaced apart from the common terminal and from each other, each cover terminal respectively electrically connected to one of the plurality of capacitors, a relay having contacts and being capable of opening and closing said contacts in response to a monitored condition of the motor, the relay having relay terminals, a fuse electrically connected to one of the relay terminals by a first wire wherein the fuse electrically disconnects the hard start capacitor replacement unit and the motor upon a failure, and a second wire electrically connecting one of the relay terminals and the motor, a third wire electrically connecting the common terminal and one of the relay terminals, a fourth wire electrically connecting one or more cover terminals to one of the relay terminals, wherein the contacts of the relay close to electrically connect one or more capacitors of the plurality of capacitors to the motor, and the contacts of the relay open to electrically disconnect the one or more capacitors of the plurality of capacitors from the motor.

An electric propulsion system for a vertical take-off and landing (VTOL) aircraft having a heat exchanger to cool fluids used in an electrical engine, the electric propulsion system comprising at least one electrical engine mechanically connected directly or indirectly to a fuselage of the VTOL aircraft and electrically connected to an electrical power source. The electrical engine may comprise an electrical motor having a stator and a rotor; a gearbox assembly comprising a sun gear; at least one planetary gear; a ring gear; and a planetary carrier. The electric engine may include an inverter assembly comprising a thermal plate and an inverter assembly housing; an end bell assembly that is connected to the thermal plate of the inverter assembly; and a heat exchanger comprising an array of cooling fins and tubes.

The invention relates to the technical field of vibration noise optimization, in particular to a vibration noise optimization method and system of an electric drive assembly. The method comprises the following steps of collecting multi-working-condition vibration noise of a transmission motor in an electric drive assembly and performing frequency domain conversion to generate vibration noise frequency domain data; on the basis of the data, carrying out gear meshing stress unbalance loading limit calculation, carrying out tooth surface pitting corrosion cycle ductility simulation, and identifying a bearing clearance expansion increment; optimizing the bearing structure according to the bearing clearance expansion incremental data to obtain bearing structure optimization data; performing tooth direction drum shape modification analysis according to the tooth surface pitting corrosion data to obtain modification data; and finally, carrying out anti-vibration strengthening design by combining bearing optimization and tooth direction modification data, generating structural anti-vibration strengthening design data, and sending the structural anti-vibration strengthening design data to a terminal so as to execute structural optimization and reduce the influence of vibration noise. According to the method, the vibration noise optimization technology is optimized, so that the vibration noise optimization technology is more perfect.

The present technology provides a fitness device for use by a user. The fitness device can include a resistance assembly including a spool, a motor, a gearbox, a pulley system, and a cord. The spool can include a first end and a second end. The motor can be selectively engageable with the spool and disposed adjacent to the first end of the spool. The motor can be configured to generate a resistance force. The gearbox can be disposed between the motor and the spool. The pulley system can be disposed adjacent to the second end of the spool. The cord can be disposed on the spool and the pulley system and can be configured to be wound and unwound in a single layer on the spool when pulled by the user. The present disclosure also provides a method for using a fitness device by a user.

An electric tool includes an electric motor and a battery for supplying electric power to the motor. The battery includes: a battery cell; a control device integrated into the battery cell, the control device comprising an inertial measurement unit and a communication and control module, wherein the inertial measurement unit includes: at least one sensor configured to measure at least one motion parameter of the electric tool, and a controller configured to receive the motion parameter output by the at least one sensor and generate a state indication signal indicating the motion state of the electric tool; the communication and control module comprising: a communication unit configured to communicate with external devices, and a processor configured to receive the state indication signal and generate a switch control signal; a switch network configured to receive the switch control signal generated by the control device and control the power output of the battery based on the switch control signal.

The invention discloses a high-speed motor capable of adaptively adjusting cooling efficiency, and belongs to the technical field of high-speed motors, the high-speed motor comprises a high-speed motor body, an output shaft is mounted in the middle of the high-speed motor body, and a dustproof net cover is fixed on the back of the high-speed motor body; the surface of the high-speed motor body is provided with heat dissipation fins which exchange heat with external air for cooling, the high-speed motor body is provided with a water-cooling cooling part, the high-speed motor body is provided with a temperature sensor, the high-speed motor body is provided with an air-cooling cleaning part, and the air-cooling cleaning part is electrically connected with the temperature sensor. According to the high-speed motor capable of adaptively adjusting the cooling efficiency, impurities and dust attached to the surfaces of the heat dissipation fins can be conveniently cleaned, the normal heat exchange performance of the heat dissipation fins is guaranteed, and meanwhile the cooling efficiency of the heat dissipation structure can be adjusted according to the actual working temperature of the motor.

An electric machine designed as a permanently excited synchronous machine, including a rotor with a rotor body arranged on a rotor shaft, a stator, and a displacement device that generates a relative axial movement between the rotor body and the stator based on a torque produced between the rotor shaft and the rotor body. The displacement device has first and second displacement elements and at least one rolling body arranged between the first and second displacement elements. The first displacement element is axially movable and rotatable to a limited degree on the rotor shaft, and the second displacement element is connected to the rotor shaft rotationally fixed. The displacement elements provide that upon rotation of the first displacement element relative to the second or vice versa, the rotor body is pushed on the rotor shaft axially against the spring force.

The present invention relates to the technical field of electric motors, and specifically relates to a three-phase direct-current brushless electric motor, comprising: an electric motor housing, an inner shell, a rotating shaft, a rotor, a stator, a Hall sensor, and a circuit protection device, wherein the inner shell is fixedly mounted at the upper end of the electric motor housing; the rotating shaft is rotatably connected to the electric motor housing; the rotor and the stator are mounted inside the inner shell; and the Hall sensor is rotatably fitted with the rotating shaft. The circuit protection device is located above the rotor; during operation, when the rotating shaft is stuck due to a fault, or when there is an overload, the circuit protection device controls the disconnection of a circuit, thereby realizing the power-off self-locking of the electric motor by means of a load control module, thus avoiding the demagnetization of a rotor permanent magnet at a high temperature caused by heating of the electric motor, and avoiding affecting the rotation speed and normal use of the electric motor.

The present application provides a reverse-type integrated miniature linear servo electric cylinder. An open end of a rotor housing in a power transmission mechanism is fixedly connected to a planetary carrier by means of a coupling, the planetary carrier is directly driven by means of integration of the motor rotor housing and the planetary carrier, and after power transmission via the planetary carrier, an output end is directly driven to achieve linear motion without adding a gear reduction mechanism to a power transmission system of the electric cylinder, thereby significantly reducing the internal space of the electric cylinder occupied by the power transmission mechanism, allowing the electric cylinder to develop to have a more miniaturized and compact structure, saving costs; moreover, the energy utilization rate of the electric cylinder is improved, the electric energy consumption of the electric cylinder is reduced, and relatively good economic benefits can be yielded.

The invention belongs to the technical field of motors, and relates to a vertical magnetic suspension motor. On the basis of the magnetic bearing control module, the cooling control module and the control evaluation module, closed-loop control of the rotor stably suspending at the target position is achieved, oscillation and steady-state errors are reduced, and the control precision is effectively improved; by dynamically calculating the temperature gradient difference and the cooling power regulation and control value and combining the PID controller and the liquid cooling / air cooling cooperation strategy, on-demand cooling is achieved, the cooling energy consumption is reduced, the temperature balance is improved, and the problems of local overheating or too high energy consumption are avoided; by performing normalized weighted analysis on key parameters such as magnetic bearing energy efficiency and cooling efficiency, feeding back control evaluation coefficients in real time and guiding system parameter optimization, the stability and reliability of long-term operation of the motor are ensured, the failure rate of the motor is reduced, the functional integrity is ensured, and system-level optimization is facilitated.

Apparatus and associated methods relate to an ambient magnetic field motor (AMFM) operable in a strong ambient magnetic (e.g., electromagnetic) field (AMF) having at least one rotor, each with respective shafts extending a corresponding rotation axis. The motor may, for example, be activated in response to the AMF to generate an output torque. In an illustrative example, the motor may, for example, include a mechanical output shaft mechanically coupled to the at least one rotor. For example, the mechanical output shaft may, for example, extend along a longitudinal axis intersecting at least one corresponding rotation axis of the at least one rotor. For example, in an AMF, the at least one rotor may, for example, be induced to rotate by the AMF in response to a selectively applied electrical current to generate an output torque at the mechanical output shaft about the longitudinal axis. Various embodiments may, for example, advantageously provide an electromagnetic motor operable in a strong AMF.