124 results about "AC motor" patented technology

A motor power source regulation circuit, a control method and an electronic device are provided. The motor power source regulation circuit includes a power factor correction circuit, an isolation circuit, a first power source conversion circuit, a second power source conversion circuit and a control circuit. The isolation circuit includes a first switch sub-circuit and an isolation transformer. The power factor correction circuit regulates an AC input signal to a first DC signal. The first switch sub-circuit converts the first DC signal to a first AC signal. The isolation transformer converts the first AC signal to two or more second AC signals. The first power source conversion circuit converts the second AC signal to a DC drive signal and outputs it to a DC motor. The second power source conversion circuit converts the second AC signal to an AC drive signal and outputs it to an AC motor.

The application provides a method for observing rotor flux of an alternating current motor, and belongs to the technical field of motor control. The method comprises the following steps: calculating rotor observation flux based on a first voltage-type flux calculation model and stator voltage and stator current in a two-phase static coordinate system; obtaining an amplitude deviation by subtracting the amplitude of the rotor rated flux from the amplitude of the rotor observation flux, and obtaining a deviation compensation quantity by multiplying the amplitude deviation by a proportional integral operation; and compensating and correcting the first voltage-type flux calculation model based on the deviation compensation quantity to obtain a voltage-type flux calculation model with compensation correction, so that the amplitude of the rotor observation flux converges. The application converges the rotor observation flux to the rotor given flux by connecting a correction link based on the traditional voltage-type flux calculation model, and finally realizes accurate flux position observation.

This invention discloses a device for driving a closing component (9) in a building using a solar power source (1). It includes at least one low-voltage AC motor (3) mechanically connected to the closing component, a DC energy storage element (2), and a solar power source supplying DC voltage. The energy storage element has a rated voltage lower than the effective voltage and greater than the DC voltage supplied by the solar power source. A DC-DC charger (4) converts the output electrical energy from the solar power source into electrical energy having a charging voltage of the energy storage element. A DC-AC converter (5) converts the electrical energy from the DC output voltage of the energy storage element into electrical energy having an AC voltage capable of powering the motor.

This polyphase AC motor comprises a plurality of first partial windings that are wound around a plurality of respective teeth and a plurality of second partial windings that are wound around the plurality of respective teeth, and is configured to be capable of switching between a first connection state in which the first circuits of respective phases, which include the first partial windings, are connected to each other and a second connection state in which the second circuits of respective phases, which include series-connection circuits of the first partial windings and the second partial windings, are connected to each other.

The invention provides a single-phase alternating-current permanent magnet brushless motor which is different from a common single-phase alternating-current motor, a motor stator of the single-phase alternating-current permanent magnet brushless motor is formed by stacking silicon steel sheets with barrel-shaped interiors and armature slots and armature teeth for winding, and a cylindrical rotor is provided with permanent magnets with magnetic lines perpendicular to a motor rotating shaft in the radial direction. Magnetic lines generated by the stator and the rotor are perpendicular to a motor shaft, stator coils are concentrically wound in a distributed mode, the stator coils can be directly used on a single-phase alternating current power supply without a driver, and the speed can be adjusted through a frequency converter. Compared with a traditional single-phase alternating current motor, the motor power and torque are improved under the condition of the same specification, all south and north poles of the magnetic rotor containing the permanent magnets are driven during driving each time, and high electric energy driving efficiency and high power density are achieved. And energy conservation and emission reduction are achieved in daily industrial power application, and wide application prospects are achieved.

The invention provides an electromagnetic brake control device which further controls an electromagnetic brake without delay. An electromagnetic brake control device (55), which controls an electromagnetic brake (54) that brakes the rotation of an AC motor (53) when the energization of an electromagnetic brake coil (54a) is cut off, is provided with: a rectifier (81), the DC side of which is connected to the electromagnetic brake coil (54a); a switching unit (84) that controls the power to the electromagnetic brake coil (54a) by switching a rectifier circuit (RL) connecting the rectifier (81) and the electromagnetic brake coil (54a) on and off; a DC converter (82) that is connected to the motor drive AC circuit (51a) and converts AC power to a predetermined DC voltage; an electromagnetic brake release circuit unit (85) that switches the switching unit (84) to an ON state by means of the DC voltage generated by the DC converter (82); and an electromagnetic brake operation command unit (83) that switches the switching unit (84) to the OFF state when the value of the current waveform of the AC motor (53) is between a positive threshold value and a negative threshold value and lasts for a predetermined determination time or longer.

This utility model relates to the technical field of grinding devices, specifically a grinding device capable of double-end clamping. It includes a body, a main linear motor mounted on the inner wall of the body, a sliding outer shell mounted at the bottom of the main linear motor, an auxiliary linear motor mounted inside the body, a fixed base mounted on the upper end of the auxiliary linear motor, and a main AC motor mounted on one side of the fixed base. A main threaded rod is connected to one side of the main AC motor, and a clamping base is threadedly connected to the main threaded rod. An auxiliary AC motor is mounted on one side of the clamping base. The improved grinding device, by adding a clamping base and a clamping plate, allows the auxiliary AC motors on both sides to drive the auxiliary threaded rod to rotate when clamping metal parts, thereby causing the clamping plate to slide and clamp. Then, a servo motor drives a rotating rod to rotate, causing the pressing head to press downwards, thus clamping and fixing the metal parts on both sides and preventing the parts from shaking during grinding.

This invention discloses a hardware-software collaborative fault detection method for AC motors in a digital twin workshop, comprising the following steps: using an array-based hardware initial inspection method to obtain initial fault detection results for the AC motor; sending the initial fault detection results to the digital twin workshop system via a main controller; when the digital twin workshop system receives the initial fault detection results, using a KNN agent-based re-inspection method to obtain fault detection results; based on the fault detection results, the digital twin workshop system generates fault judgment information; when the digital twin workshop system does not receive the initial fault detection results, using a KNN agent-based prediction method to detect fault symptoms and obtain fault prediction results; and based on the fault prediction results, repairing the AC motor and recording the actual fault conditions and fault information. For large-scale motor deployments in a digital twin workshop, this invention can shorten the time for fault detection and initial fault location.

A motor control device that controls driving of an AC motor connected to a power converter performing power conversion from DC power to AC power, the AC motor driven using the AC power, includes a carrier wave generation unit that generates a carrier wave, a carrier wave frequency adjustment unit that adjusts frequency of the carrier wave, and a PWM control unit that performs pulse width modulation using the carrier wave on a voltage command corresponding to a torque command to generate a PWM pulse signal for controlling operation of the power converter, wherein the carrier wave frequency adjustment unit adjusts the frequency of the carrier wave so as to change a phase difference between the voltage command and the carrier wave based on magnitude of vibration for each circular order of electromagnetic excitation force generated circularly in a radial direction of the AC motor.

1. The name of the design product: AC motor controller (FF24). 2. The use of the design product: for various electric vehicles such as electric bicycles, electric motorcycles, electric tricycles, sightseeing vehicles, and towing vehicles. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: Design 1 perspective view 1. 5. Design 1 is designated as the basic design.

1. Name of the product in this design: Frequency converter. 2. Purpose of this design: This design is used to control AC motors. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

1. Name of the designed product: frequency converter. 2. Use of the designed product: for controlling the rotating speed of AC motor. 3. Design points of the designed product: in shape. 4. Picture or photo showing the design points: perspective view 1.

This invention belongs to the field of fault tolerance in motor systems, and relates to a fault tolerance method for current sensors in motor systems. The method includes: first, establishing an offset coordinate system using different phase currents as the Clarke coordinate transformation base axes; second, obtaining the β-axis fundamental fault-tolerant current least affected by a fault through the offset coordinate system, and then obtaining the α-axis fundamental fault-tolerant current through a second-order generalized integrator; finally, obtaining the final fault-tolerant current after a current sensor fault through a rotating coordinate transformation, and using it as a current loop feedback quantity to achieve fault isolation. This invention uses phase current as the input quantity for the fault-tolerant algorithm, avoiding the addition of extra detection equipment; the fault-tolerant algorithm does not involve motor parameters, and fault tolerance for current sensors can be achieved solely through a fault isolation algorithm designed using phase current. Therefore, this invention provides a more reliable and effective new approach for achieving fault tolerance for current sensors in AC motor systems.

The utility model belongs to the steel production technical field discloses a kind of steel car on-site operation remote control system, including operation box, and the controller being communicated with operation box;Operation box is equipped with ladle capping walking motor, ladle capping hook motor and the operating circuit for driving;Operating circuit includes walking motor loop, hook motor loop and power supply loop;Walking motor loop includes circuit breaker QF1, circuit breaker QF2, ac contactor KM1, ac contactor KM2, thermal relay FR1 and three-phase ac motor M3~;Hook motor loop includes circuit breaker QF1, circuit breaker QF3, ac contactor KM3, ac contactor KM4, thermal relay FR2 and three-phase ac motor M3~;Power supply loop is connected by circuit breaker respectively.The utility model has realized the remote operation of equipment, and operator can operate equipment far from dangerous source and place of sight difference, avoid the harm caused by molten steel spatter etc., or the equipment operation accident caused by sight difference.

Provided is a motor control device capable of achieving both an improvement in gain for high responsiveness and an improvement in control stability. The motor control device, which controls a power converter to which an AC motor is connected, is characterized by comprising: a voltage vector calculation unit that generates a voltage command for the power converter so that an AC voltage supplied to the AC motor matches a command value; an attenuation ratio control unit that, on the basis of a vibration component of a dq-axis component of the AC voltage, calculates the vibration component of a d-axis component or the vibration component of a q-axis component, and, on the basis of the calculated vibration component of the d-axis component or the calculated vibration component of the q-axis component, generates a correction amount for correcting the voltage command; and a correction amount limitation unit that limits the correction amount to a predetermined threshold when the correction amount exceeds the threshold.

The utility model discloses an alternating current motor rotor automatic roll paint device, including first roller, second roller, roller drive mechanism, be used for containing paint paint box, paint box vertical elevating system and frame, first roller and second roller are arranged in parallel horizontally with interval, and the left and right ends of first roller are rotatably connected with frame respectively, and the left and right ends of second roller are rotatably connected with frame respectively, and roller drive mechanism includes motor and transmission mechanism, and first roller or second roller is driven to rotate by motor through transmission mechanism, and alternating current motor rotor is located above first roller and second roller and is placed between both, and paint box is located below first roller and second roller, and paint box vertical elevating system is installed on frame, and paint box is driven to move up and down by paint box vertical elevating system. The utility model discloses simple structure, and alternating current motor rotor surface paint thickness is uniform, and the consistency is good, and the work efficiency is high, and it avoids the fire and other safety accidents.

The invention provides a device and a method for checking the phase sequence and polarity of an alternating-current motor, and relates to a motor detection technology. The inspection device comprises a shell, a battery and a milliammeter are integrated in the shell, the inspection device further comprises a button switch, a first jointing clamp, a second jointing clamp, a third jointing clamp and a fourth jointing clamp, the button switch and the first jointing clamp are connected into a main loop comprising the battery, and the second jointing clamp is connected to a negative electrode of the battery. And the third jointing clamp and the fourth jointing clamp are respectively connected to two ports of the milliammeter. The phase sequence checking method comprises the following steps of: clamping the head end of a first phase winding of a tested motor by using the first jointing clamp, clamping the head end of a second phase winding after short-circuiting the second jointing clamp and the third jointing clamp, and clamping the head end of a third phase winding by using the fourth jointing clamp; after the main loop is connected, the tested motor is rotated, and the phase sequence is judged by observing the pointer deflection direction of the milliammeter. And during polarity inspection, a motor winding is connected for multiple rounds, and the pointer deflection direction of the milliammeter is observed through electrification.

This utility model discloses a slotless AC motor structure based on a reduced-core design, comprising a housing, a stator module, a partial core module, and a rotor module. The housing includes a main body and a base plate. The stator module is built into the housing and includes an annular non-magnetic frame and coils. The partial core module includes several cores, which are mounted one-to-one on a core mounting bracket, with air gaps between adjacent cores. This slotless AC motor structure aims to solve problems such as significant cogging effect, excessive core weight, and inflexible magnetic circuit in traditional motor structures. The motor eliminates the traditional slotted stator structure, adopting a combination design of slotless coils and a partial magnetic core. While ensuring effective control of the magnetic flux path, it significantly reduces motor weight, manufacturing complexity, and improves dynamic response performance.

A motor control system, vehicle, and method for generating motor heat while maintaining an offset motor torque during stationary vehicle operation is presented. A method of operating an AC motor includes a resident or remote vehicle controller receiving a mode request to operate the vehicle in a stationary mode and a temperature request including the AC motor to generate motor heat during the stationary mode of operation. The controller determines an offset motor torque to generate the motor heat while operating the vehicle in the stationary mode and maintain an output member of the AC motor at a selected position. Using a DQ transform model of the AC motor, the controller selects a plurality of dq current trajectories based on the offset motor torque, the dq current trajectories located in respective dq operating quadrants of the DQ transform model. The controller then commands a power inverter to deliver current to the AC motor based on the selected dq current trajectory.

1. Name of the designed product: AC motor. 2. Use of the designed product: used in industrial vehicle electric drive system. 3. Design points of the designed product: in shape. 4. Picture or photo that best shows the design points: perspective view 1.

The application belongs to the technical field of mine hoist transmission, and specifically provides a standby power assembly based on a sheave of a mine hoist, which mainly comprises a speed regulating device, a motor, a photoelectric encoder, a clutch and a sheave. The sheave is of high strength, and the steel wire rope liner is preferably made of a material with high friction coefficient. The friction coefficient and the strength of the sheave can meet the requirements of the load carried in the standby and emergency lifting process under the traction force generated by the lifting steel wire rope. In the case of need, the clutch is attracted, and under the action of the speed regulating device, the alternating current motor rotates at a speed corresponding to 0~f e (rated frequency), and the direct current motor rotates at a speed corresponding to 0~U e (rated voltage). The sheave is driven to rotate by the clutch, and the lifting steel wire rope is driven to rotate by the high-friction liner nested in the sheave pulley, so as to complete the standby or emergency lifting task. Under normal circumstances, the clutch is separated, and the standby power assembly is in standby state.

1. The name of the design product: low-voltage frequency converter. 2. The use of the design product: used for accurate control of the speed and torque of an alternating current motor by changing the frequency and voltage of the input power of the motor, realizing automation, energy saving and optimizing the process. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: design 1 perspective view 1. 5. Design 1 is designated as the basic design.

To provide an AC motor control device that drives and controls an AC motor using voltage phase control, and is capable of speeding up the overall response while suppressing reverse current response.SOLUTION: An AC motor control device converts DC power into AC power on the basis of a voltage phase command output from a voltage phase control unit and outputs the AC power to an AC motor, and the voltage phase control unit includes a change amount limiting unit that limits the amount of change in the voltage phase.SELECTED DRAWING: Figure 2

1. The name of the design product: frequency converter (1). 2. The use of the design product: power electronic device for controlling the speed and output power of AC motor, controlling motor operation. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: design 1 perspective view 1. 5. Design 1 is designated as the basic design.

The invention belongs to the technical field of motors, and particularly relates to an outer rotor AC motor stator structure efficient in heat dissipation and reliable in operation, the stator structure comprises a stator, a split cast aluminum bearing seat, an insulating framework and a protective cover, the upper part of the split cast aluminum bearing seat is sleeved with the stator, and the lower part of the split cast aluminum bearing seat is sequentially provided with the insulating framework and the protective cover; the stator comprises a stator core, and a stator body is provided with a stator groove, a shaft hole and a heat dissipation torque transmission hole. The split cast aluminum bearing seats are directly cast and formed on the stator, the heat dissipation torque transmission holes are formed in the stator iron core of the stator, heat is transmitted to the bearing seat A and the bearing seat B at the two ends through the heat dissipation torque transmission rods arranged in the heat dissipation torque transmission holes in a penetrating mode, and efficient heat transmission is achieved; meanwhile, the protection cover is provided with the arc-shaped ventilation slots and the radial ventilation slots, a complete heat dissipation channel of stator heat production-heat dissipation torsion bar conduction-bearing seat heat dissipation is formed, heat generated when the stator works can be rapidly discharged, and the situation that the performance and the service life of the motor are affected due to overheating of the stator is avoided.

The utility model discloses an alternating-current motor overspeed protection device for a stacker crane. The alternating-current motor overspeed protection device comprises an alternating-current motor, the protection device further comprises an electromagnetic brake, a fan, a threaded conical shaft, a front fan cover, an encoder, a rear fan cover and an electromagnetic brake, a main shaft and a rear end cover are arranged in the alternating current motor, a deep groove ball bearing and a bearing outer cover are fixedly installed at the position of the rear end cover, a groove is formed in the bearing outer cover, and a double-lip framework oil seal is installed in the groove. A spline is arranged between the electromagnetic brake and the main shaft, and the electromagnetic brake is fixed on the main shaft through the spline; in the alternating current motor overspeed protection device provided by the utility model, the motor is provided with the electromagnetic brake and the fan, so that self-air-cooling is realized while braking deceleration parking is satisfied, and the temperature rise of the motor is effectively reduced; meanwhile, the cone shaft is matched with the encoder, the rotating speed of the motor can be transmitted to a control system, and therefore speed regulation and motor monitoring are achieved.

A motor is connectable to a single-phase AC power supply and forms a hermetic compressor. The motor includes a main circuit connected in parallel with the auxiliary circuit, and a winding structure having a main winding arranged as part of the main circuit and an auxiliary winding arranged as part of the auxiliary circuit. The motor includes a rotor arranged to be rotated by a current in the winding structure. To provide a motor durable and cheap to manufacture and to ensure a suitable response to overload situations, the auxiliary circuit has a first section and a second section extending in parallel where an NTC is inserted in the first section. A PTC is inserted in the second section, and a relay is arranged to activate and deactivate current in the first section of the auxiliary circuit based on a current level in the main circuit.

The invention belongs to the technical field of motor fault diagnosis, and particularly relates to an alternating current motor fault diagnosis method and device based on modulation bispectrum and a storage medium. In order to solve the problems of signal distortion and the like in motor fault diagnosis, the method comprises the following steps of: acquiring a current signal and a voltage signal of an alternating current motor in real time, performing short-time Fourier transform on the current signal, and extracting a single-peak ridge line R1 of a time-frequency spectrogram TFS1; time-frequency analysis based on modulation bispectrum is carried out on the current signal, and a single-peak ridge R2 of a time-frequency spectrogram TFS2 is extracted; obtaining phase average power PI according to the current signal, the voltage signal and the single-peak ridge line R1; determining a characteristic frequency threshold H1 for judging whether a fault occurs or not according to the ratio of the phase average power PI to the rated power PR of the alternating current motor; acquiring a fault characteristic frequency amplitude HF according to the current signal I1 and the single-peak ridge line R2; and judging whether the AC motor has a motor broken bar fault or not and the severity of the fault according to the ratio of the fault characteristic frequency amplitude HF to the characteristic frequency threshold H1.

1. The name of the design product: low-voltage frequency converter (MDG3-400KW). 2. The use of the design product: by changing the frequency and voltage of the motor input power, the speed and torque of the AC motor are accurately controlled, and automation, energy saving and process optimization are realized. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.