27 results about "Memory motor" patented technology

The invention discloses a variable magnetic flux memory motor, which comprises a stator, armature windings and a rotor, and is characterized in that the armature windings comprise a first winding and a second winding which are different and switchable in mode; the rotor comprises a plurality of poles distributed in the circumferential direction, each pole comprises a first layer of permanent magnets and a second layer of permanent magnets, the first layer of permanent magnets are high-coercive-force permanent magnets, the second layer of permanent magnets comprise at least two second permanent magnets, all the second permanent magnets are high-coercive-force permanent magnets or all the second permanent magnets are low-coercive-force permanent magnets, and the first layer of permanent magnets and the second layer of permanent magnets are arranged in the circumferential direction. And the characteristics of the magnetic materials of the second layer of permanent magnets of two adjacent poles are opposite, a fundamental wave main magnetic field is formed through the first winding in a magnetism increasing state so as to improve the permanent magnet torque, and the second winding is switched to excite a harmonic magnetic field in a magnetism weakening state so as to maintain torque output. According to the invention, through the collaborative design of the heteropole asymmetric permanent magnet layout and the dual-mode winding, the problems that the magnetic adjustment range of the existing variable flux memory motor is limited and the torque is suddenly reduced in a weak magnetic state are solved, and the efficient operation interval is obviously widened.

The invention discloses a variable flux memory motor adopting a consequent-pole double-layer staggered permanent magnet structure. Belongs to the field of motor design and manufacturing. Each layer of permanent magnet in the variable flux memory motor adopts a high coercive force (HCF) permanent magnet and a low coercive force (LCF) permanent magnet, the HCF and the LCF in each layer of permanent magnet form a parallel magnetic circuit, and the HCF and the LCF between the two layers of permanent magnets are arranged in a staggered manner to form a series magnetic circuit, so that the double-layer U-shaped staggered permanent magnet structure can have the advantages of series connection and parallel connection of the two permanent magnets; and meanwhile, good load magnetic stabilization capability and a wide magnetic adjustment range are achieved. In addition, the consequent pole permanent magnet design can effectively reduce the magnetic circuit magnetic resistance and improve the LCF magnetizing and demagnetizing effect.

The invention discloses a variable flux memory motor and a shaftless rim underwater thruster, the motor comprises a stator, an armature winding, a rotor, a plurality of low-coercivity permanent magnets and a plurality of high-coercivity permanent magnets, the armature winding adopts a twelve-phase winding, the low-coercivity permanent magnets and the high-coercivity permanent magnets are arranged in the rotor and are alternately distributed in the circumferential direction; the low-coercive-force permanent magnet is connected with the high-coercive-force permanent magnet in series in a magnetism increasing state and a magnetism weakening state, and in the magnetism increasing state, the magnetomotive force direction of the low-coercive-force permanent magnet is consistent with that of the high-coercive-force permanent magnet; and in the weak magnetic state, the reverse is achieved. By adopting the series magnetic circuit structure design of the two different coercive force permanent magnets, the load magnetic stabilization capability of the low-coercive force permanent magnets in the motor can be effectively improved, so that the magnetic field stability and the overall performance of the motor are improved.

The utility model relates to a handheld automobile seat memory motor detection device, which belongs to the field of automobile seat quality detection and comprises a shell, a hook, a circuit board, a voltage comparison module and a battery. The shell comprises an upper shell and a lower shell; the hook is hinged with the lower shell; the reel is arranged in the shell; a shaft rod of the hand wheel penetrates through the side portion of the lower shell and is fixedly connected with the winding frame. One end of the sheath wire is welded on the circuit board, and the other end of the sheath wire penetrates out of the central hole of the reel and penetrates through the lower shell; the end, outside the shell, of the sheath wire is inserted into the junction box, and the anti-skid rubber pads are fixedly pasted to the two sides of the lower shell. As the voltage comparison module powered by the battery is connected with the indicating lamp and the buzzer, compared with an oscilloscope detection device in the prior art, the size is reduced, the cost is reduced, the device is convenient to carry, detection can be carried out in a seat storeroom by holding the device by hand, the detection time is shortened, the detection range is enlarged, and the product quality consistency is effectively improved.

The present invention discloses a hybrid permanent magnet memory motor and a multi-stage magnetic modulation pulse injection method, which relate to the technical field of memory motors. The present invention comprises: a stator core, wherein the inner circumference of the stator core is provided with a plurality of stator teeth, and the armature winding is installed between two stator teeth; and a rotor core, wherein the rotor core is sleeved inside the stator core. The Y-type topology structure of the present invention includes two different magnetic circuits, a series type and a parallel type. The high coercive force permanent magnet can provide a stable magnetomotive force, and since the high coercive force permanent magnet is located outside the rotor, it can effectively resist unexpected demagnetization under load conditions; the low coercive force permanent magnet can be bidirectionally magnetized, and most of the magnetic field forms a short circuit inside the rotor when the magnetism is weak, thereby effectively improving the magnetic modulation range. Compared with the traditional d-axis magnetic modulation, the magnetic modulation method only requires a smaller pulse current to achieve the same magnetic modulation effect as the traditional structure.

The present application provides a brushless hybrid permanent magnet memory motor based on three excitation sources and a control method thereof, belonging to the field of motor technology. The present application adopts the design scheme of a hybrid permanent magnet memory motor, introduces a DC excitation winding into a spoke-type permanent magnet synchronous motor, places it in a magnetic bridge fixed on the end cover, and introduces an axial additional air gap to realize a brushless structure, eliminating devices such as brushes and slip rings; arc-shaped low-coercive force permanent magnets and annular low-coercive force permanent magnets are designed, and matched with air slots distributed on the rotor core, so that the three excitation sources can be matched and combined with each other, and the motor air gap flux can be adjusted, so that the motor can achieve a wide torque range while ensuring the high efficiency and high torque density of the motor. The brushless hybrid permanent magnet memory motor based on three excitation sources provided by the present application has two modes: energy-saving mode and high-performance mode. Each operating mode includes two working states: magnetization and demagnetization, and the output voltage and speed can be adjusted over a wide range.

The present invention provides a variable flux memory motor design method based on a novel hysteresis model, comprising: step S1, obtaining a first magnetization state point of a permanent magnet in the permanent magnet hysteresis model; step S2, determining whether magnetization or demagnetization is required: if so, proceeding to step S3; if not, returning to step S1; step S3, applying a magnetization current or a demagnetization current to update the magnetic field strength; step S4, determining a second magnetization state point after the first magnetization state point is moved at the current moment and updating the first-order magnetization rise curve or the first-order magnetization fall curve for the first time; step S5, removing the magnetization current or the demagnetization current; step S6, determining a third magnetization state point after the second magnetization state point is moved at the current moment and updating the first-order magnetization rise curve or the first-order magnetization fall curve for the second time, retaining the third magnetization state point for calculating motor parameters. The present invention has the beneficial effect of accurately simulating the magnetization characteristics of aluminum nickel cobalt materials and reducing complexity.

Power tools may include a housing. Power tools may include a motor assembly located within the housing, the motor assembly including a stator and a rotor, the stator having winding slots for receiving stator windings, and the rotor including a first magnet positioned at a first distance from a rotational center of the rotor and a second magnet positioned at a second distance from the rotational center of the rotor, wherein the first magnet is made of a rare-earth material and the second magnet is a low-coercivity magnet.

The invention provides an off-line magnetizing and demagnetizing device and method for a variable flux memory motor, and relates to the technical field of motor magnetizing and demagnetizing, the device comprises an upper computer, a controller and a magnetizing and demagnetizing circuit, and the magnetizing and demagnetizing circuit comprises three electromagnetic switches and a plurality of magnetizing and demagnetizing capacitors; one end of each magnetizing and demagnetizing capacitor is electrically connected with the positive end of the direct-current power supply, and the other end of each magnetizing and demagnetizing capacitor is electrically connected with the negative end of the direct-current power supply; one end of the magnetizing and demagnetizing capacitor is electrically connected with a first winding in the memory motor through the first electromagnetic switch, and the other end of the magnetizing and demagnetizing capacitor is electrically connected with a second winding and a third winding of the memory motor through the second electromagnetic switch and the third electromagnetic switch respectively; the control end of the first electromagnetic switch, the control end of the second electromagnetic switch and the control end of the third electromagnetic switch are all electrically connected with a controller, and the controller is electrically connected with an upper computer. According to the invention, the controller is used for controlling the on-off of the electromagnetic switch, and the magnetizing and demagnetizing capacitor can accurately magnetize the three-phase armature winding of the memory motor.

A system for multi-Variable Flux Memory Motor (VFMM) configuration includes a set of VFMMs connected to one or more drivetrains, the set of VFMMs being configured to convert kinetic energy of the one or more drivetrains into electric power or vice-versa. The system includes a controller configured to selectively change a magnetization state of one or more VFMMs from the set of VFMMs based on power requirements. The system changes the magnetization state of the set of VFMMs based on an optimal magnetization configuration determined for each power requirement.

The application discloses a memory motor model predictive current control method considering mode switching and relates to the technical field of memory motor control. The application comprises the following steps: collecting information such as inverter bus voltage, memory motor rotor position, rotating speed and winding current; calculating winding current dq-axis components; calculating current q-axis current reference value and giving d-axis current reference value; judging system running state; updating current prediction model parameters according to magnetization state; applying dynamic control or steady-state control according to system running state; and obtaining inverter bridge arm switch tube control signals. The method applies corresponding control algorithms according to system running state, improves system steady-state performance and guarantees fast dynamic response speed. In addition, the problem of large parameter variation range of the memory motor under different magnetization states is considered, and the shortcomings of poor steady-state performance, unfixed switching frequency and dependence on accurate system parameters of the traditional model predictive current control are overcome.

The present invention belongs to the field of permanent magnet memory motor design and discloses a stator multi-tooth hybrid permanent magnet memory motor, comprising a stator, a rotor, an armature winding, an excitation winding, and a rotating shaft. The stator includes a stator yoke, the inner side of which is fixedly connected to stator teeth, the stator yoke between two adjacent stator teeth is inlaid with a high-coercivity permanent magnet, the stator teeth are provided with a plurality of small teeth at one end away from the stator yoke, and a low-coercivity permanent magnet is fixedly connected between the small teeth at the ends of two adjacent stator teeth; the armature winding and the excitation winding are wound around the stator. By arranging two permanent magnets in parallel in a magnetic concentrating manner and applying a pulse current simultaneously to change the state and direction of the low-coercivity permanent magnet, a wide range of adjustment of the motor's no-load air gap magnetic field is achieved; the multi-tooth stator structure can shorten the distance between adjacent stator teeth, reduce the amount of permanent magnets used, and improve the torque density and reduce torque pulsation while improving the utilization rate of the permanent magnets.

The invention discloses a magnetic field enhanced hybrid permanent magnet adjustable magnetic flux memory motor, which comprises a stator, a winding, a rotor and a rotating shaft, the stator is provided with the winding, the rotor is fixed on the rotating shaft, and the rotor is provided with low-coercivity permanent magnets, high-coercivity permanent magnets, V-shaped hybrid permanent magnet grooves and V-shaped high-coercivity permanent magnet straight grooves. And the V-shaped mixed permanent magnet grooves and the V-shaped high-coercivity permanent magnet straight grooves are alternately and uniformly arranged along the circumferential direction of the rotor iron core. According to the invention, the working point of the low-coercivity permanent magnet is improved, and the power density and the overload operation capability of the motor are improved; a loop is formed between the magnetic fluxes of the high-coercivity permanent magnets and the low-coercivity permanent magnets in the V-shaped mixed permanent magnet grooves, so that the air gap flux density can be greatly reduced, and the flux adjusting range of the motor is greatly widened; and the low-coercivity permanent magnet enters an air gap, so that the effect of improving the power density of the motor is achieved.

The application discloses a series magnetic circuit self-leakage magnetic type variable magnetic flux memory motor and relates to the technical field of motors.The application comprises a stator, a rotor and a winding, the rotor is provided with a first permanent magnet, a second permanent magnet, a third permanent magnet, a fan-shaped magnetic barrier and a magnetic bridge, the first permanent magnet and the second permanent magnet are uniformly distributed in a first layer and a second layer of rotor iron cores in a one-word type, a fan-shaped magnetic barrier is arranged between the two first permanent magnets, the third permanent magnet is uniformly distributed in the rotor iron core in a spoke shape, the fan-shaped magnetic barrier is respectively provided with a magnetic bridge between the permanent magnet and the outer edge of the rotor, and the first permanent magnet is respectively provided with the second permanent magnet and the third permanent magnet to form a series magnetic circuit.The application can break through the bottleneck problem of a narrow magnet adjustment range of a traditional series built-in variable magnetic flux memory motor, can maintain high torque density, can reduce the amplitude of a required demagnetizing current and can widen the high-efficiency operation range of the motor.

This invention discloses a magnetic field-enhanced parallel magnetic circuit variable flux memory motor, relating to the field of motor technology. The invention includes: a stator, comprising a stator core on which an armature winding is mounted; a hybrid permanent magnet rotor rotatably connected inside the stator; the hybrid permanent magnet rotor includes a rotor core on which multiple first permanent magnets are mounted, circumferentially distributed at the outer edge of the rotor core; second permanent magnets are mounted at both ends of each of the first permanent magnets, and the coercivity of the first permanent magnets is less than that of the second permanent magnets; multiple sector-shaped magnetic barriers are formed on the rotor core. This invention can significantly improve the load demagnetization resistance of low-coercivity permanent magnets, solving the problem of unstable operating point in parallel magnetic circuit variable flux memory motors, while maintaining the advantage of a wide magnetic adjustment range.

Systems are provided a rotor and magnets of a system of an electric machine that is a variable flux machine (VFM), such as a memory machine or memory motor (MM). The rotor of the system, comprising: a first set of magnets with higher coercivity integrated in at least a slot of the rotor to be arranged in a V-shape; and a second set of magnets with a lower coercivity, compared to the first set of magnets, the second set of magnets comprising at least a pair of magnets of different grades arranged in parallel in a radial slot of the rotor, where the first set of magnets forms a first magnetic layer and the second set of magnets forms a second magnetic layer of the rotor.

A system for shifting operation modes of Variable Flux Memory Motor (VFMM) from external inputs includes one or more VFMMs that convert electrical power to kinetic energy, the one or more VFMMs being configured to shift to any one of a plurality of operation modes, one or more man-machine interfaces that receive one or more external inputs from a user, the one or more external inputs being indicative of a target operation mode from the plurality of operation modes selected by the user, and a controller that shifts the operation mode of the one or more VFMMs to the target operation mode based on the one or more external inputs received from the one or more man-machine interfaces.

A system for shifting operation modes of Variable Flux Memory Motor (VFMM) from external inputs includes one or more VFMMs that convert electrical power to kinetic energy, the one or more VFMMs being configured to shift to any one of a plurality of operation modes, one or more man-machine interfaces that receive one or more external inputs from a user, the one or more external inputs being indicative of a target operation mode from the plurality of operation modes selected by the user, and a controller that shifts the operation mode of the one or more VFMMs to the target operation mode based on the one or more external inputs received from the one or more man-machine interfaces.

The application discloses an asymmetric axial electromagnetic force wave calculation method of an axial magnetic field permanent magnet memory motor, which mainly comprises the following steps: determining a solving coordinate system, respectively establishing Poisson equations and Laplace equations for the motor according to different solving regions of air gaps and Halbach array permanent magnets, solving static axial air gap magnetic flux density and circumferential air gap magnetic flux density according to boundary conditions that should be met by an open-circuit magnetic field analytical model on the basis of obtaining a Laplace general solution, calculating a Halbach array permanent magnet magnetic motive force during motor operation, respectively calculating a single-phase winding generated magnetic motive force and a three-phase winding generated magnetic motive force when the motor is supplied with three-phase symmetrical sinusoidal currents, and deducing and calculating a motor axial air gap magnetic field distribution formula in the case of considering air gap permeability. In the case of ignoring air gap saturation, axial electromagnetic force acting on a unit area of the axial magnetic field permanent magnet memory motor is calculated according to Maxwell tensor equations.

The present invention discloses a multi-stage magnetic adjustment type double-salient pole high-speed memory motor, which relates to the field of motor technology and includes a motor housing and a rotating shaft body rotatably connected to the motor housing, including a stator structure and a rotor structure. In the present invention, the high-coercive force permanent magnets with opposite magnetization directions on the first and third stators optimize the magnetic field distribution inside the motor, making the magnetic field more uniform, reducing distortion, and improving operating efficiency. The low-coercive force permanent magnets of the second stator can be flexibly adjusted, and the magnetization and demagnetization operations have little effect on the high-coercive force permanent magnets. The interaction between the salient poles of the rotor body and the magnetic field of the stator permanent magnets generates magnetic resistance and electromagnetic torque, driving the motor to rotate. The rotor body corresponding to the first stator is offset by forty-five degrees, so that the interaction between the rotor and the stator permanent magnets at different positions is more uniform and continuous, reducing torque fluctuations. The three stators are evenly spaced along the axis of the motor housing, reducing the interference of the high-coercive force permanent magnets on the low-coercive force permanent magnets.

A system for multi-Variable Flux Memory Motor (VFMM) configuration includes a set of VFMMs connected to one or more drivetrains, the set of VFMMs being configured to convert kinetic energy of the one or more drivetrains into electric power or vice-versa. The system includes a controller configured to selectively change a magnetization state of one or more VFMMs from the set of VFMMs based on power requirements. The system changes the magnetization state of the set of VFMMs based on an optimal magnetization configuration determined for each power requirement.

The application discloses a memory motor current feedback time-sharing filter control method considering dynamic and steady state performance, which divides memory motor current control into two time periods, namely, a steady state operation period and a dynamic field regulation period. In the steady state operation period, the direct and quadrature axis currents are subjected to low-pass filtering to eliminate high-frequency noise, and then are fed back to the current controller to weaken current ripple in the steady state operation period and reduce motor operation noise. In the dynamic field regulation period, the low-pass filter at the direct and quadrature axis current feedback position is cancelled to eliminate the phase delay caused by the low-pass filter, thereby accelerating the current response speed, ensuring that the direct axis field regulation current can be accurately tracked, and reducing the current fluctuation caused by the cross-coupling effect, so as to weaken the field regulation torque fluctuation. The memory motor current control method can not only make the memory motor have smaller operation noise in the steady state operation period, but also make the memory motor have accurate current tracking performance and smaller field regulation torque fluctuation in the dynamic field regulation period.

The present invention discloses a permanent magnet memory motor with a same-pole asymmetric magnetic circuit, which relates to the technical field of permanent magnet memory motors. The present invention comprises: a stator, on which an armature winding is mounted; a hybrid permanent magnet rotor, which is rotatably connected to the inner side of the stator; the hybrid permanent magnet rotor comprises a rotor core, on which a plurality of magnetic pole assemblies are mounted, and the plurality of magnetic pole assemblies are evenly arranged in the circumferential direction; the magnetic pole assemblies comprise a first hybrid permanent magnet unit arranged in different magnetic circuits and a second hybrid permanent magnet unit in a series magnetic circuit; the first hybrid permanent magnet unit and the second hybrid permanent magnet unit form an angle that opens outward, and the first hybrid permanent magnet unit and the second hybrid permanent magnet unit are alternately arranged on the outer side of the rotor core. By combining the advantages of series-parallel magnetic circuits, the present invention further broadens the motor's magnetic adjustment range while simplifying the rotor structure, and at the same time ensures the stability of the permanent magnet operating point during load operation.

This invention belongs to the field of motor technology and discloses a magnetic pole complementary hybrid permanent magnet memory motor, including a hybrid permanent magnet rotor. The hybrid permanent magnet rotor includes a rotor core, a first permanent magnet, a second permanent magnet, a third permanent magnet, a fourth permanent magnet, and U-shaped magnetic barriers with outward openings evenly distributed around the rotor core. The third and fourth permanent magnets are symmetrically arranged on both sides of the U-shaped magnetic barriers, and the first and second permanent magnets are embedded in a straight line at the bottom of the U-shaped magnetic barriers. The permanent magnets embedded on both sides of each U-shaped magnetic barrier have the same coercivity, but different coercivity from the permanent magnet embedded at the bottom. The permanent magnets embedded at the bottom and sides of adjacent magnetic barriers have different coercivity. Permanent magnets with different coercivity levels in adjacent magnetic poles form a "complementary" arrangement. This invention further expands the rotor design space through a complementary magnetic pole structure, combining high torque density and strong magnetic stability.

A system for multi-Variable Flux Memory Motor (VFMM) configuration includes a set of VFMMs connected to one or more drivetrains, the set of VFMMs being configured to convert kinetic energy of the one or more drivetrains into electric power or vice-versa. The system includes a controller configured to selectively change a magnetization state of one or more VFMMs from the set of VFMMs based on power requirements. The system changes the magnetization state of the set of VFMMs based on an optimal magnetization configuration determined for each power requirement.

An integrated synchronous motor charger includes a battery, and a synchronous motor having a set of phase windings, with each phase winding thereof having an open-ended winding configuration, the synchronous motor being electrically connected to the battery via a bidirectional inverter on a first end of at least one phase winding from the set of phase windings, and to a power source on a second end of the at least one phase winding. The synchronous motor is operably shiftable between a charging mode and a driving mode, the synchronous motor allowing electric power to flow bidirectionally between the power source and the battery in the charging mode, and allowing electric power to flow bidirectionally between the battery and the synchronous motor in the driving mode.