294 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 invention relates to an AC motor synchronous modulation method based on a phase-locked loop and a PWM generator, and belongs to the technical field of motor control, and the method comprises the steps: determining a voltage phase angle outputted by an AC motor based on an output voltage of vector control of the AC motor, and converting the voltage phase angle into a synchronous phase angle of a carrier wave based on a carrier wave ratio; the synchronous phase angle is used for determining a sine input signal of the phase-locked loop; determining a cycle count increment adjustment value of the carrier based on the sinusoidal input signal; and correcting the cycle count increment value of the carrier based on the cycle count increment adjustment value. According to the alternating current motor synchronous modulation method based on the phase-locked loop, the period ratio and the phase relation of the carrier wave and the modulation wave are fixed, so that the harmonic content of the output voltage and the harmonic content of the output current are kept consistent in the synchronous modulation process, extra harmonic voltage and current cannot be generated, and overall harmonic treatment of a system is facilitated.

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.

An alternating current (AC) motor system includes an AC motor with a rotor and a stator with multi-phase AC stator windings. The system also includes a power inverter that generates a multi-phase AC voltage, an AC bus that connects the power inverter to the stator windings, an AC choke that surrounds the AC bus, and a current sensor with a coil wound on or surrounded by the AC choke. The current sensor measures common mode current in the AC bus, and is used in pulse width modulation or slew rate control of the power inverter, ensuring smooth operation and reducing the risk of damage due to common mode current.

This AC motor control device comprises: a current detector; a first coordinate converter that converts a detection current before conversion, which is the detection result detected by the current detector, into a two-axis detection current which is a current on two rotating axes; a two-axis current filter that reduces the noise component of the two-axis detection current; a second coordinate converter that converts the filtered two-axis current into a filtered three-phase current in a stationary coordinate system; a first controller that generates a first three-phase voltage command on the basis of the two-axis detection current or the filtered two-axis current; a second controller that generates a second three-phase voltage command on the basis of the filtered three-phase current; and an inverter that applies a voltage to an AC motor on the basis of the first and second three-phase voltage commands.

The invention discloses a non-cascade control method, device and system for an alternating current motor. Firstly, in order to solve the problem of non-matching disturbance suppression, a nonlinear disturbance observer is designed to achieve estimation and compensation of matching disturbance and non-matching disturbance in a system, a corrected time-varying sliding mode surface is provided, and the sliding mode surface can reduce the influence of disturbance estimation errors to a certain extent. In addition, a current constraint problem under non-cascade control is considered, and a nonlinear damping item is introduced to realize dynamic constraint of the current. Compared with a traditional non-cascade control method, the method provided by the invention has stronger anti-interference capability, and can ensure that the current of the motor runs within a safe range.

1. The name of the design product: AC motor radiator. 2. The use of the design product: for AC motor radiating. 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.

1. Name of the designed product: Integrated frequency converter (IX210 WellBUS). 2. Use of the designed product: The designed product is used for changing the frequency of the power supply of the motor to control the power control equipment of the AC motor. 3. Design points of the designed product: in shape. 4. Picture or photo best showing the design points: perspective view 1.

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.

An ice removal system for cables on bridges, consisting of: an adjustable ring-shaped stainless steel construction for cables of different diameters with a firm and stable hold, without slipping; at least six ball-bearing rubber wheels for smooth gliding along the cable without damaging its surface; an AC drive system with a 300 W AC motor to drive a gearbox that has a roller and all rollers are driven synchronously to ensure free movement; a fixed blade that is rigidly mounted on the machine and serves to scrape and push the ice away from the cable, when the device moves the cable upwards; and a remotely controlled system for switching on and off, raising and lowering, and torque operation to achieve the maximum ice removal flow in each case.

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.

A drive device (4) that drives an AC motor (1) by means of an inverter (11) includes a current detection unit (12) that detects the current flowing through the AC motor, a rotor position calculation unit (14) that calculates rotor position information which is information on the position of the rotor of the AC motor, a voltage command determination unit (15) that determines a voltage command based on the current vector of the current and the rotor position information, and a beatless control unit (18) that suppresses the pulsation of the current caused by the periodic pulsation of the DC bus voltage by operating the voltage phase of the voltage command. The beatless control unit has a norm calculation unit that calculates the norm of the current vector, a pulsation extraction unit that extracts the pulsating component of the norm, and an automatic search unit that searches for the operation amount of the voltage phase at which the pulsating component is minimized. The beatless control unit operates the voltage phase using the operation amount.

A drive device (4) for driving an AC motor (1) by an inverter (11) comprises: a current detection unit (12) for detecting a current flowing through an AC motor; a rotor position calculation unit (14) for calculating rotor position information that represents the position of a rotor included in the AC motor; a voltage command determination unit (15) for determining a voltage command on the basis of the current vector of the current and the rotor position information; a beat-less control unit (18) for suppressing the pulsation of a current caused by the periodic pulsation of a DC bus voltage by operating the voltage phase of the voltage command; and a resonance detection unit (20) for detecting the inductor-capacitor resonance between the inverter and an AC power supply (5) for supplying power to the inverter. The beat-less control unit reduces the operation amount of the voltage phase when the inductor-capacitor resonance is excited.

The present application relates to a motorcycle AC motor, AC motor stator assembly and its preparation method, the AC motor stator assembly includes the stator main body, the stator main body outer wall is provided with a plurality of winding teeth, and winding slot is arranged between the adjacent two winding teeth;The winding tooth includes a charging ignition coil winding tooth and a plurality of charging lighting coil winding tooth;The top of each winding tooth is provided with an arc-shaped pole shoe, and the two side edges of the pole shoe are provided with arc-shaped baffles;The outer wall of the stator main body, the outer wall of the winding tooth, the inner side wall of the pole shoe and the inner side wall of the baffle are all covered with an insulating layer, and the insulating layer is fixedly provided with a charging ignition coil lead-out head and a charging lighting coil clamping piece clamping groove.The present application only sets up a charging ignition coil winding tooth, and only needs to set up a charging ignition coil when manufacturing, so that the winding workload is reduced, and the production efficiency is improved.

Exemplary embodiments are disclosed of variable frequency drive (VFD) controllers with engine fail-over and systems including the same. In exemplary embodiments, a system includes a controller configured to be operable for controlling a VFD that drives a motor (e.g., a three-phase AC motor, etc.), which, in turn, drives (e.g., mechanically spins, etc.) a first pump. The same controller is also configured to be operable for controlling an engine (e.g., a diesel engine, etc.), which, in turn, drives (e.g., mechanically spins, etc.) a second pump. The system is configured to failover from the motor to the engine in response to a VFD communications failure.

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 application relates to the technical field of steel bar detection, and discloses a steel bar strength detection equipment for building engineering quality detection, which comprises a base, an upper feeding assembly and a cutting assembly are fixed at the top of the base, and the upper feeding assembly is located at the left side of the cutting assembly. The steel bar is automatically fed and conveyed through the upper feeding assembly, manual continuous feeding operation is not needed, the use superiority of the equipment is improved, the driving pulley is driven to rotate through the output shaft of the second AC motor, the driven pulley is driven to rotate under the transmission action of the belt, the power rod is further driven to rotate, the two worms are driven to rotate, the two worm gears are driven to rotate in opposite directions, the two cutting rollers are driven to rotate, the two cutting tools are further driven to rotate, the steel bar is cut during the rotation of the two cutting tools, the steel bar is slittingly cut, the steel bar does not need to be pre-cut, and the use convenience of the equipment is further improved.

The utility model discloses a single-phase capacitive AC motor, which is characterized in that the single-phase capacitive AC motor comprises a motor body, a stator assembly and a rotor assembly, the stator assembly and the rotor assembly are arranged in the motor body, the stator assembly comprises a stator iron core, a main winding and an auxiliary winding, the main winding and the auxiliary winding are arranged on the stator iron core, and small rings of the main winding and the auxiliary winding are stacked in the same groove. The main winding and the secondary winding are formed by winding more than two wires in parallel, so that the problem of wire embedding difficulty is solved, and large current and large wire diameter are replaced. The utility model has the advantages of good stability, longer service life, reduced cost and higher use value.

The present invention relates to the technology of motor variable-frequency drive, and particularly relates to a three-phase bridge series-type variable-frequency drive system and a layout method. The system includes a rectifier, m three-phase units, and an AC motor; each three-phase unit includes a three-phase bridge inverter, a capacitor connected in parallel on the DC side, and a DC bypass switch; the positive and negative DC input terminals of the m three-phase units are connected in series in sequence and connected to the DC output terminal of the rectifier; the stator winding of the AC motor includes m mutually isolated sub-windings; the AC output terminals of the m three-phase units are respectively connected to the three-phase terminals of the m sub-windings of the AC motor; m is a positive integer. This system independently supplies power to each sub-winding of the motor stator with each three-phase unit, and by using the isolation between the sub-windings of the motor stator, the phase-shifting transformer installed to achieve input-side power isolation for each unit and the three-phase uncontrolled rectifier circuit of each unit in a conventional cascaded inverter are omitted, improving the power density of the variable-frequency drive system.

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.

The invention provides an AC motor rotor coil external diameter measuring device. The device comprises a main support; the coil supporting part is connected with the main bracket; one end of the measuring block is in contact with the circumferential surface of the measured coil; the auxiliary support is located above the coil supporting component and connected with the main support, the measuring block is further movably matched with the auxiliary support, a first through hole is further formed in the auxiliary support, and the other end of the measuring block is in clearance fit with the first through hole; the mounting plate is connected with the main support, a second through hole is formed in the mounting plate, and the first through hole is communicated with the second through hole; the numerical value displayer comprises a displayer body and a measuring head, the displayer body is installed on the installation plate, and the measuring head is inserted into the second through hole and matched with the axial end of the measuring block. According to the invention, the external diameter of the AC motor rotor coil can be accurately measured, the operation is simple, and the measurement error is small.

The utility model discloses a transfer printing mechanism suitable for cambered surface transfer printing, and relates to the technical field of transfer printing, the transfer printing mechanism comprises a transfer printing machine main body, the surface of the transfer printing machine main body is provided with a box door through a hinge, the transfer printing machine main body is internally provided with an upper cavity and a lower cavity, compared with the prior art, the transfer printing mechanism has the advantages that the clamping pipe is fixedly installed on the surface of the output shaft of the first alternating current motor, the angle of the transfer printing mechanism can be flexibly adjusted so that the transfer printing mechanism can adapt to shell surfaces with different radians, accurate alignment and stable contact in the transfer printing process are guaranteed through the flexibility, the transfer printing efficiency is improved, and the production cost is reduced. According to the arc-surface shell transfer device, more kinds of arc-surface shells such as mobile phone rear covers can be processed, the arc-surface shell transfer device can be applied to the wider electronic product manufacturing field, stable clamping of the arc-surface shells in the transfer process can be ensured through cooperation of the T-shaped clamping plates and the double-end lead screws, and effective clamping of shells of different sizes and materials can be achieved.

Provided is a motor control device which uses a motor as a heater when the motor does not rotate, and which changes the cycle of the current flowing in each phase on the basis of the temperature difference between UVW phases, effectively uses a three-phase coil to disperse heat, increases the heat energy that can be used for temperature rise, and improves the stability of the torque when switching from warm-up to driving. A motor control device (100) controls an AC motor (16) driven by a power converter (15) that performs power conversion from DC power to AC power. The motor control device (100) has phase output units (22, 26, 27, 28, 29) for controlling the phase of the current or voltage on the basis of the rotor position of the AC motor (16) when the AC motor (16) does not rotate; and a coil temperature acquisition unit (21) that acquires or estimates the temperature of each phase coil of the AC motor (16), and the phase output units (22, 26, 27, 28, 29) control the phase of the current or voltage such that the loss of the phase having a lower temperature among the temperatures of the phase coils is increased.

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.

The invention relates to electrical engineering. In the area of physics of magnetism of engine building. Creation of an engine capable of creating mechanical energy due to a magnetic field. Use this mechanical energy to generate electricity, in mechanical engineering, aircraft building and shipbuilding, as well as in all industries where mechanical energy is used. The objective of the invention is to obtain a large lifting force as an engine based on magnetic fields. The essence of the invention lies in the fact that the electromagnetic motor, consisting of a housing, shaft, rotor, and stator of magnets. In which the rotor, stator, shaft, and body in the form of a frame are made of non-magnetizable material. The shaft consists of a rotating shaft and a fixed axle. The rotating shaft is mounted on a fixed axle with the help of bearings. The rotor consists of four tiers, where the first upper tier is made in the form of a domed disk containing permanent magnets. All tiers are made in the form of a disk with cone-shaped cylinders of different diameters planted on them with a decrease in height. The lower part of each cone-shaped cylinder has semicircular holes and the diameter of the lower part of the cone-shaped cylinder corresponds to the diameter of the disk of the corresponding tier. The disks contain permanent magnets arranged in a spiral, the poles of which of all four disks are directed upwards with the outgoing side of the magnetic lines of force or vice versa. While the cone-shaped cylinders contain permanent magnets, the poles of the magnets of the cone-shaped cylinders are directed inward by the outgoing side of the magnetic lines of force or vice versa. Inside the cone-shaped magnetic cylinders there are triangular or crescent-shaped magnetic repulsors of force lines, the poles of which are opposite to the poles of the cone-shaped magnetic cylinder. One of the pushers is located opposite to the hole in the cylinder. On the upper dome-shaped disk, the magnetic field lines are directed downward, into the inside of the dome or vice versa. The hole from where the rotating shaft of the rotor comes out is also closed by a permanent magnet, this magnet is built into the rotating shaft itself at the level of the domed disk. And it is made with the possibility of rotation together with the said shaft. The rotor rotates on a fixed shaft, in which the fixed magnets are located at the levels with the disks. The whole structure is rigidly fastened with a nut on a rotating shaft. The whole structure is rotated by a DC or AC motor. The electric motor is fixed on the frame.

The invention aims to provide an alternating current motor capable of removing moisture, and relates to the field of alternating current motors, the alternating current motor capable of removing moisture comprises a moisture removing device, the moisture removing device comprises a guide groove and a covering plate, water drops and water flow in the motor can be guided to the guide groove through a flow guide hole in a shell so as to be discharged to the outside, and when external water vapor or water vapor on the guide groove evaporates, the water drops and the water flow can be discharged to the outside. Backflow of water vapor is reduced through the covering plate; the heating device comprises a mounting plate and a heating pipe and can heat the interior of the motor so as to evaporate internal water vapor and discharge the internal water vapor; the ventilation device comprises a fan, a diverter valve and a spray pipe, and can accelerate the circulation of airflow in the motor, so that water vapor in the motor can be quickly evaporated and volatilized, and the purpose of removing moisture is achieved.

The utility model discloses an alternating current motor stator winding device, which relates to the technical field of motors and comprises a sliding frame. The sliding frame is connected to the support in a sliding mode, a plurality of rotating seats are connected to a plummer block of the sliding frame in a matched mode, and the outer sides of the rotating seats are sleeved with threading frames. According to the utility model, the rotating seats can drive the threading frames to rotate, and wires on the threading frames rotate along with the rotating seats, so that the wires can rotate outside the stators and are matched with the stator mounting seats to rotate in the direction, the stators on the stator mounting seats can be wound more quickly, and the plurality of rotating seats can simultaneously rotate the stator winding of the plurality of stator mounting seats on the rotating disc; the stator winding device is simple in structure and convenient to use, the stator mounting seat of the wound stator rotates along with rotation of the rotating disc, a worker can conveniently take down and place a new stator, and stator winding on the remaining stator mounting seat is not delayed.