9results about How to "Increased torque output capability" patented technology

The application belongs to the technical field of vehicle braking system, and discloses a segmented pole arc motor for an electronic mechanical braking system, a use method and a vehicle.The motor comprises a stator and an inner rotor, the stator adopts a split tooth structure, is provided with an alternating current armature winding and a direct current excitation winding, and the rotor is provided with segmented pole arc permanent magnets, so that the motor forms a hybrid excitation structure in which a permanent magnet magnetic field and an excitation magnetic field are superposed.Through segmented optimization of the pole arc of the permanent magnet, the air gap magnetic flux waveform is improved, the cogging torque and torque ripple are reduced, and the running stability is improved; equivalent flux linkage is controlled by adjusting the excitation current, the no-load speed is improved in the braking gap elimination stage, and the armature current and the locked-rotor copper loss are reduced in the clamping force following and maintaining stage.The cogging torque, torque ripple and locked-rotor copper loss are reduced in the structural level and the control level, and the application is suitable for stable and reliable work of the electronic mechanical braking system under various working conditions.

The invention discloses an electromechanical integrated reaction momentum flywheel structure based on an air bearing, and belongs to the technical field of spacecraft attitude control equipment. Comprising a structure base, a rotating shaft, a porous air bearing, a motor rotor magnetic ring, a motor stator coil, an encoder magnetic ring, an encoder reading head, a bearing pressing ring, a flywheel and a shell, the structure base comprises a bottom base, a sleeve part and a bearing installation opening, and the rotating shaft comprises a flange, a magnetic ring installation shaft neck and a bearing installation shaft neck. The bearing installation shaft neck is arranged in a center hole of the porous air bearing in a penetrating mode, the motor rotor magnetic ring is tightly sleeved on the magnetic ring installation shaft neck, the motor stator coil is embedded between the sleeve portion and the motor rotor magnetic ring, a uniform gap is formed between the motor stator coil and the motor rotor magnetic ring, and the encoder magnetic ring is tightly sleeved on the lower end portion of the magnetic ring installation shaft neck. The encoder reading head is sleeved outside the encoder magnetic ring and is fixed with the bottom base; and a uniform gap is formed between the encoder reading head and the encoder magnetic ring. The device has the advantages of high reliability, long service life, low power consumption and high control precision.

The invention discloses a joint module and a robot, and relates to the technical field of robotics.The joint module comprises a power output part and a two-stage planetary speed reducing mechanism integrated in the power output part, and the power output part and the two-stage planetary speed reducing mechanism are in axial positioning fit through a built-in limiting structure; wherein the two-stage planetary speed reducing mechanism is provided with an integrated common gear ring, a second-stage sun gear of the two-stage planetary speed reducing mechanism is of a hollow cavity structure, and the hollow cavity structure is configured to be an assembly containing space of the built-in limiting structure. The two-stage planetary speed reduction mechanism is integrally integrated in the internal containing space of the outer rotor type brushless motor, the two-stage planetary speed reduction mechanism and the outer rotor type brushless motor are coaxially and integrally arranged to form a compact integrated structure, the overall size of the joint module is greatly reduced, the design requirement for miniaturization of a robot is met, an external speed reduction component does not need to be additionally arranged, and cost is reduced. And the assembly structure of the robot joint is simplified.

The invention provides a double-disc-double-ring stator hybrid magnetic flux permanent magnet motor. The double-disc-double-ring stator hybrid magnetic flux permanent magnet motor comprises a double-disc-double-ring stator, H-shaped block iron cores I, II and III, an outer rotor I and II, a middle rotor, an annular winding and a direct cooling water jacket, three types of H-shaped block iron cores I, II and III are arranged by using silicon steel lamination structures in three shapes, and the double-disc-double-ring stator is of an integrated combined structure of the three types of H-shaped block iron cores I, II and III. The double-disc stator I and the double-disc stator II are respectively provided with an inner ring stator I and an outer ring stator I and an outer ring stator II, and the double-disc-double-ring stator support is arranged in the middle of an inner ring between the inner ring stator I and the inner ring stator II. A middle rotor is arranged between the double-disc stator I and the double-disc stator II, and an outer rotor I and an outer rotor II are arranged outside the double-ring stator I and the double-ring stator II. An endless annular winding is adopted, and a direct cooling water jacket is arranged on the periphery of the annular winding. A direct cooling water jacket, a stator bracket and a stator periphery constraint are arranged by using a heat-conducting carbon fiber-resin composite material. By using the structure, the torque density of the motor is improved.

The invention provides a rotor structure and a motor. The rotor structure comprises a rotor iron core, the rotor iron core is provided with a first magnetic steel groove and at least two second magnetic steel grooves, under one pole, the first magnetic steel groove is perpendicular to the d axis of the rotor structure, the at least two second magnetic steel grooves are arranged on the two sides of the d axis at intervals and are symmetrical about the d axis, the first magnetic steel groove is located between the at least two second magnetic steel grooves, and the second magnetic steel grooves are perpendicular to the d axis. The second magnetic steel groove comprises a first rectangular magnetic steel groove and a second rectangular magnetic steel groove, in the radial direction, the first rectangular magnetic steel groove is located on the outermost side of the second magnetic steel groove in the radial direction, the second rectangular magnetic steel groove is located on the innermost side of the second magnetic steel groove in the radial direction, the tangential thickness of the first rectangular magnetic steel groove is W1, the tangential thickness of the second rectangular magnetic steel groove is W2, and W1 is smaller than W2. According to the rotor structure, the q-axis magnetic circuit of the motor can be increased, the q-axis inductance can be improved, the salient pole ratio of the rotor structure can be improved, the reluctance torque effect can be improved, and the torque output capacity of the motor can be further improved.

This invention discloses a method for selecting a constrained polytope to expand the actual operable range of a permanent magnet synchronous motor. The method includes: constructing a voltage-constrained polytope with five vertices; scanning the entire speed range, line segment L... i -G slope, to obtain line segment L i -Minimum absolute value of the slope of G; based on line segment L i The minimum absolute value of the slope of -G is used to determine the location of point Wi, and then the location and shape of the voltage-constrained polytope are determined. A system of linear equations for the voltage-constrained polytope is obtained. Based on this system of linear equations, combined with traditional prediction models and value functions, an explicit model predictive controller is constructed. This invention simplifies the explicit model predictive controller, expands the limit boundary of the actual operating range of the motor, increases the speed range and torque output capability of the motor, broadens the external characteristic curve of the motor, and enhances its extreme operating capability.

This utility model provides an assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor, belonging to the field of motor retrofitting technology. It includes multiple stacked rotor laminations, each with shaft holes, multiple magnet holes, and multiple fixing holes, as well as two fixing washers. The rotor laminations include a head lamination, multiple middle laminations, and a tail lamination. The middle laminations have positioning grooves and positioning flanges, and the fixing holes are arranged around the shaft holes, with the positioning flanges also arranged around the fixing holes. The head laminations have positioning flanges, and the tail laminations have positioning grooves. The fixing washers have through holes, and the two fixing washers are respectively fitted onto the front end face of the head lamination and the rear end face of the tail lamination. This assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor improves the motor's efficiency and torque output capability, ensuring good and stable motor performance.

The invention discloses an SRM harmonic closed-loop torque ripple suppression method based on current square. The method comprises the following steps: (1) constructing an electromagnetic torque expression containing current square, and solving a current square harmonic model with optimal torque ripple; (2) obtaining a current square model with an optimal current square direct current bias value and an optimal torque ripple; (3) generating a fundamental wave amplitude reference value of the current square model with the optimal torque ripple, and obtaining a current square excitation model in an actual injection motor and an actual current square model of an output motor; (4) in order to realize closed-loop suppression of the torque ripple, the auxiliary channel executes a correction process; and (5) compensating an instantaneous torque peak appearing in a specific electrical angle range, completing harmonic closed-loop torque ripple suppression, and realizing an optimal torque ripple scheme. According to the invention, a double-layer compensation architecture based on current square harmonic injection and torque real-time feedback is constructed, so that the systematic suppression of the torque ripple of the switched reluctance motor is realized.

The application discloses a kind of asymmetric permanent magnet motor of combined magnetic pole Halbach structure, including outer stator and inner rotor, rotor surface is provided with non-uniform Halbach array, each magnetic pole of Halbach array is composed of segmented unequal-width three-part unit block combined arrangement, including the mixed permanent magnet main magnetic pole unit block of radial magnetization and its left and right adjacent ferrite permanent magnet auxiliary magnetic pole unit block, and the tangential magnetization ferrite permanent magnet unit block.Rotor inside alternately distributes two different sizes V type and inverted V type symmetrical air magnetic barrier, wherein one side of V type air magnetic barrier is built-in neodymium iron boron permanent magnet, inverted V type air magnetic barrier is built-in two pieces of neodymium iron boron permanent magnet, which is not symmetrical with magnetic barrier axis and unequal length.The present application, under the premise of certain permanent magnet consumption, makes the maximum current angle of permanent magnet torque and reluctance torque component more approximate by the magnetic pole offset design of permanent magnet, enhances the asymmetric magnetic field offset effect, improves torque component utilization, effectively improves the torque output capacity.