65results about How to "Reduce output torque fluctuation" patented technology

A high speed stabilizing drive control method of a satellite-borne large inertia load mechanism includes the following steps: (1) powering direct currents on a motor and calculating the phase difference of the motor and a rotary transformer after the load mechanism is stabilized; (2) collecting the current rotating speed of the motor at the current speed ring sampling instant and calculating torque electric currents; (3) collecting the electric currents iA and the electric currents iB of the motor at the current speed ring sampling instant to obtain the harmonic frequency spectrum, the amplitude and the phase of the iA and the iB; (4) conducting harmonic compensation on the iA and the iB; (5) converting the A-phase winding currents and the B-phase winding currents of the motor after compensation under a rotor coordinate system; (6) calculating the two-shaft voltage of the rotor coordinate system; (7) determining the three-phase time value of a PWM waveform generator, wherein a SVPWM waveform generator generates voltage waves according to the three-phase time value, and the voltage waves are loaded on a motor winding to control the motor; (8) entering the next current ring sampling instant, and switching to the step (3) to execute repeatedly; (9) entering the next current ring sampling instant, and switching to the step (2) to execute repeatedly.

The invention relates to the field of motors, in particular to a single-phase transverse flux full-control switched reluctance motor, and aims to solve the problem that the traditional single-phase switched reluctance motor is high in output torque fluctuation, low in output torque density and incapable of outputting continuous torque. The single-phase transverse flux full-control switched reluctance motor in a cylinder structure comprises a stator, a rotor and a motor output shaft. An air gap is formed between the stator and the rotor. The rotor is fixed outside the motor output shaft. The stator comprises a stator core, a front upward stator winding, a front downward stator winding, a rear downward stator winding, and a rear upward stator winding. The rotor comprises a permanent magnet, a front rotor core and a rear rotor core. The permanent magnet is a circular permanent magnet. The single-phase transverse flux full-control switched reluctance motor has the advantages that the output torque fluctuation is reduced by 20%, the output torque density is increased by 10% compared to that of the traditional motor, the motor can output continuous torque, measuring process of the switched reluctance motor is simpler, and manufacturing cost of the switched reluctance motor is reduced. The single-phase transverse flux full-control switched reluctance motor is applicable to the field of motors.

The invention discloses a variable-inertia and variable-damping torsion damper. The variable-inertia and variable-damping torsion damper comprises a variable-inertia assembly and a variable-damping assembly; the variable-inertia assembly comprises a left end disk, a right end cover, an inner iron core, a permanent magnet, an inner coil and variable-mass-distribution ferrofluid; and the inner coil and the permanent magnet are combined to generate a magnetic field to change the distribution and the magnitude of a magnetic field at the position of the ferrofluid, and the magnitude of rotating inertia of the variable-inertia assembly is continuously adjusted. The variable-inertia and variable-damping torsion damper can independently serve as a front end torsion damper of an internal combustion engine and can also serve as a secondary flywheel of a dual-mass flywheel to be connected with a clutch; the transmission system damping and the rotating inertia can be adjusted in a self-adaptive manner according to requirements of a control algorithm; and torsion vibration of a transmission system is effectively inhibited. The variable-inertia and variable-damping torsion damper has the beneficial effects that the structure is compact, output damping torque is large, the rotating inertia adjustment range is wide, and the dynamic response is fast; and the fuel oil economy of the internal combustion engine can be improved easily, and the variable-inertia and variable-damping torsion damper can also be applied in a zero-gravity environment of the aerospace and thus has wide application prospects in rotating type mechanical devices.

The invention discloses a built-in permanent-magnet synchronous motor. The built-in permanent-magnet synchronous motor comprises a rotor iron core and a rotor shaft, wherein a plurality of pairs of magnetic poles are arranged on the rotor iron core and are arranged around the rotor shaft, the plurality of pairs of magnetic poles are divided to two groups of magnetic poles in average, and for arbitrary one group of magnetic poles, each magnetic pole is arranged at the other side, facing a symmetric middle line in a deviation way by taking the symmetric middle line arranged between the magnetic poles at two sides of the group as an axis, and the distances between magnetic isolation bridges between the magnetic poles in the arbitrary one group of magnetic poles are equal. In the abovementioned built-in permanent-magnet synchronous motor, a mode of magnetic pole deviation is relatively simple, the rotor structure of the built-in permanent-magnet synchronous motor is relatively convenient to improve, and the built-in permanent-magnet synchronous motor is also easy to operate; and moreover, with the built-in permanent-magnet synchronous motor improved according to the abovementioned mode, the cogging torque amplitude can be reduced to a great extent, and the fluctuation of an output torque is greatly reduced.

The invention discloses a non-contact method for supporting a high-speed motor rotor by using ultrasonic vibration. A bearing bush 2 with a conical surface is sleeved at each of the left end and the right end of the motor rotor 3; the bearing bushes 2 are respectively connected with an ultrasonic transducer 1; the inner conical surfaces of the bearing bushes 2 are matched with the outer conical surfaces of the ultrasonic transducers 1; when the ultrasonic transducers 1 are in an ultrasonic vibration states, the outer conical surfaces have suspension capacity; under the mutual action of the outer conical surfaces of the ultrasonic transducers 1 and the inner conical surfaces of the bearing bushes 2, suspension force is transmitted to the motor rotor 3, and motor rotor 3 is suspended under the extrusion action of the suspension force on two sides, so that an aim of supporting the motor rotor 3 without any contact is fulfilled; and moreover, the motor rotor 3 and a stator 4 are in a clearance non-friction state, so that high-rotating-speed rotation can be realized. The method has the advantages that an ultrasonic suspension supporting system is simple in structure, easy to control and high in stability; electromagnetic coupling does not exist between an ultrasonic suspension process and a motor, so that any influence on a rotating magnetic field of the motor can be avoided; and besides the conventional air floating, liquid floating or magnetic suspension, the invention provides another novel non-contact method for supporting the high-speed motor rotor.

The invention discloses an air conditioner compressor rotating speed fluctuation suppression method. The method includes processes of controlling a compressor according to real-time angular velocity and moment. The process of controlling the compressor according to the real-time angular velocity includes the following steps: filtering axis errors to obtain an angular velocity compensation amount;obtaining a compensated angular velocity output amount according to the angular velocity compensation amount; and correcting the real-time angular velocity according to the compensated angular velocity output amount and controlling the compressor; The process of controlling the compressor according to the moment includes the following steps: calculating a difference between a target angular velocity fluctuation amount and the compensated angular velocity output amount to obtain a first angular velocity difference; filtering the first angular velocity difference to obtain filtered angular velocity; inputting the filter angular velocity into a speed loop regulator to obtain output moment; obtaining a moment compensation amount according to the first angular velocity difference; and obtainingcompensated output moment according to the moment compensation amount and the output and controlling the compressor. The effectiveness of compressor rotating speed fluctuation suppression can be improved by applying the air conditioner compressor rotating speed fluctuation suppression method.

The invention discloses a forecabin module structure of an electric four-wheel drive automobile chassis, which comprises a first assistant frame providing installation supporting, a forecabin combined support which can be installed on the frame and provide the installation supporting, a first motor which provides driving force to automobile front wheels and is firmly connected on the first assistant frame by a plurality of suspension structures, as well as a direct current transformer, a charging machine, a whole vehicle controller and a first motor controller which are respectively installed on the forecabin combined support, wherein the forecabin combined support comprises a plurality of parallel horizontal tubes and a plurality of parallel longitudinal tubes, the multiple longitudinal tubes are arranged on the horizontal tubes in a staggered manner, a first metal plate is disposed on the horizontal tubes, and a second metal plate is disposed on the longitudinal tubes. By implementing the forecabin module structure of the electric four-wheel drive automobile chassis provided by the invention, the effective installation supporting and sufficient space can be provided, heat dissipation efficiency can be increased, electromagnetic interference can be avoided, and arrangement space and protection performance of power batteries can be increased.

The invention discloses a method for restraining rotating speed fluctuation of a single-rotor compressor. The method comprises the process of controlling the compressor according to the real-time angular speed and the step of controlling the compressor according to the force moment; the process of controlling the compressor according to the real-time angular speed comprises the steps that the axiserror is filtered, and the axis error compensation quantity is obtained; the axis error compensation quantity is input into a phase-locked loop adjuster, and the output angular speed of the phase-locked loop adjuster is obtained; the real-time angular speed is corrected through the output angular speed, and the compressor is controlled according to the corrected real-time angular speed; the process of controlling the compressor according to the force moment comprises the steps that the difference between the target angular speed fluctuation quantity and the output angular speed of the phase-locked loop adjuster is calculated, and a first angular speed difference value is obtained; the first angular speed difference value is filtered, and the filtered angular speed is obtained; the filtered angular speed is input into a speed loop adjuster, and the output force moment is obtained; and the compressor is controlled according to the output force moment. By applying the method, the effectiveness of restraining rotating speed fluctuation of the compressor can be improved.

The invention discloses a method for controlling the rotating speed of a compressor of an air conditioner. The method includes the processes of controlling the compressor according to the real-time angular speed and the torque; the process of controlling the compressor according to the real-time angular speed includes the following steps that filtering processing is performed on the axis error, and the angular speed compensation quantity is acquired; the compensated angular speed output quantity is acquired according to the angular speed compensation quantity; the real-time angular speed is corrected according to the compensated angular speed output quantity, and the compressor is controlled; the process of controlling the compressor according to the torque includes the following steps that the difference between the target angular speed fluctuation quantity and the fed-back angular speed quantity is calculated, and the first angular speed difference is acquired; filtering processing is performed on the first angular speed difference, and the filtered angular speed is acquired; the filtered angular speed is input into a speed loop regulator, and the output torque is acquired; the torque compensation quantity is acquired according to the first angular speed difference; the compensated output torque is acquired according to the torque compensation quantity and the output torque,and the compressor is controlled. By the aid of the method, the effectiveness of suppressing of the fluctuation of the rotating speed of the compressor can be improved.

The invention discloses a single-rotor compressor rotating speed control method. The single-rotor compressor rotating speed control method comprises the process of controlling a compressor according to the real-time angular speed and moment; the process of controlling the compressor according to the real-time angular speed comprises the steps of carrying out filtering on an axis error, and obtaining the angular speed compensation amount; compensating the angular speed compensation amount into the output angular speed of a phase-locked loop adjuster, and obtaining the compensated angular speedoutput amount; according to the compensated angular speed output amount, correcting the real-time angular speed, and according to the corrected real-time angular speed, controlling the compressor; the process of controlling the compressor according to the moment comprises the steps of calculating the difference between the target angular speed fluctuation amount and the compensated angular speedoutput amount, obtaining a first angular speed difference value; carrying out filtering on the first angular speed difference value, and obtaining a filtering angular speed; inputting the filtering angular speed into a velocity loop adjuster, and obtaining output torque; and according to the output torque, controlling the compressor. The compressor rotating speed fluctuation inhibition effectiveness can be improved.

The invention discloses a method for controlling the rotating speed of a single-rotor compressor. The method includes the processes of controlling the compressor according to the real-time angular speed and the torque. The process of controlling the compressor according to the real-time angular speed includes the steps that the axis error is filtered, and an angular speed compensation dosage is obtained; the angular speed compensation dosage is compensated into the output angular speed of a phase-locked loop adjuster, and the compensated angular speed output quantity is obtained; and the real-time angular speed is corrected according to the compensated angular speed output quantity, and the compressor is controlled according to the corrected real-time angular speed. The process of controlling the compressor according to the torque includes the steps that the difference between the target angular speed fluctuation quantity and the compensated angular speed output quantity is calculated,and a first angular speed difference value is obtained; the first angular speed difference value is filtered, and the filtered angular speed is obtained; the filtered angular speed is input in a speed loop adjuster, and the output torque is obtained; and the compressor is controlled according to the output torque. By means of the method, the effectiveness of rotating speed fluctuation suppressionof the compressor can be improved.

The invention discloses a range extender assembly and a vehicle. The range extender assembly comprises an engine part and a motor part connected with the engine part. The engine part includes: an engine block; and a crankshaft arranged in the engine cylinder body. The motor part comprises a rotor assembly connected with one end of the crankshaft, wherein a flywheel is arranged at the end, close to the crankshaft, of the rotor assembly, and crankshaft position marks are arranged on the periphery of the flywheel; and a stator assembly arranged on the periphery of the rotor assembly and connected with the engine cylinder body, wherein a crankshaft position signal sensor used for reading crankshaft position marks is arranged on the stator assembly. A flywheel of the engine part is omitted, the flywheel is integrated at the end, close to the crankshaft, of the rotor assembly, the flywheel is arranged close to the engine, bending stress caused by the mass of the flywheel is reduced, the bearing load of a main shaft of the engine part is reduced, crankshaft position marks are arranged on the periphery of the flywheel, and the crankshaft position marks can be read conveniently; the motor part applies compensation torque according to the crankshaft position, and the output torque fluctuation of the engine part is reduced.