33results about How to "Stable torque output" patented technology

The invention discloses a threaded linear ultrasonic motor. The threaded linear ultrasonic motor comprises a stator and a rotor, wherein the stator comprises stator bases, longitudinal vibration piezoelectric plates and torsional vibration piezoelectric plates. The longitudinal vibration piezoelectric plates and the torsional vibration piezoelectric plates are sticked on the stator. The stator bases are four flat surfaces which are uniformly cut on a hollow cylinder to be used for sticking the longitudinal vibration piezoelectric plates and the torsional vibration piezoelectric plates. The longitudinal vibration piezoelectric plates and the torsional vibration piezoelectric plates are respectively arranged symmetrically and used in pairs. The rotor is penetrated through the stator, and is matched with an inner thread of two thread driving ends of the stator through an outer thread of the rotor. The longitudinal vibration piezoelectric plates and the torsional vibration piezoelectric plates excite compound vibrations of a longitudinal vibration and a torsional vibration in the stator to enable a particle movement locus of the thread driving ends of the stator to be ellipses. The stator drives the rotor to be rotated through rub and transform a rotational motion to a rectilinear motion. The threaded linear ultrasonic motor can achieve speed regulation and dual direction driving. The threaded linear ultrasonic motor has the advantages of being low in cost, high in accuracy, and simple to manufacture. The threaded linear ultrasonic motor contributes to miniaturization and industrialization.

The invention discloses a water-cooled motor stator iron core fixing structure and a fixing method thereof. According to the fixing structure, a stator iron core and a water channel pressing plate are connected rigidly by utilizing steel pins and colloid injected into a shell, the water channel pressing plate and the stator iron core, the water channel pressing plate is also connected with the shell rigidly, and therefore fixation of the stator iron core is achieved. The fixing structure enables air gaps between a stator and a rotor of a water-cooled motor to be more even and motor torque output to be stable, and noise can be lowered effectively. According to the fixing method of the water-cooled motor stator iron core fixing structure, the hot press fitting technology does not need to be adopted, only a common press fitting technology is needed, the technology is simple, and assembling cost can be reduced. When the hot press fitting technology is adopted, the risks of uneven deformation exist in heating and cooling deformation processes, the unevenness can be transmitted to the air gaps between the stator and the rotor, and the performance of the motor is further influenced, but no mentioned risks exist in the fixing method of the water-cooled motor stator iron core fixing structure.

A P2 architecture hybrid idle speed control method, which belongs to a motor idle speed control method. Aiming at the defects of high fuel consumption, high emission pollution, unsafe and unstable in the existing idling method, the present invention provides a P2 architecture hybrid idling control method with no fuel consumption, no pollution, safety and stability. A P2 architecture hybrid idle speed control method involved in the present invention judges whether the whole machine system enters the idle speed state, if it is satisfied, enters the idle speed state, if not, exits the idle speed state; after entering the idle speed state, through the vehicle control The controller HCU sends the motor target idle torque value to the micro control unit MCU, and the micro control unit MCU executes the instructions of the vehicle controller HCU to control the operation of the motor, and the motor performs torque control according to the target torque to realize driving under idling conditions. The invention is mainly applied to controlling the fuel consumption and emission level of the idling working condition.

The present invention provides a duty cycle design method, system, medium and equipment for eliminating current sampling interference. The duty cycle design method for eliminating current sampling interference includes: synchronously setting the power factor corrector and the clock signal of the frequency converter , so that the clock signal used by the power factor corrector and the frequency converter is the same; under the same clock signal, the switching frequency of the power factor corrector is set to the fixed frequency of the switching frequency of the frequency converter multiple; set the sampling time of the frequency converter according to the parity of the fixed multiple; compare the relationship between the duty cycle time and the sampling time of the frequency converter, and phase-shift the duty cycle of the power factor corrector according to the comparison result ; the duty cycle time and the power factor corrector duty cycle are determined according to the switching period of the power factor corrector. The invention solves the problem of current sampling interference generated when the PFC and the frequency converter are used simultaneously by providing a control method of the PFC duty cycle.

The invention discloses a method for preparing a flat scroll spring, including steel preparation, phosphating and wire drawing, single-sided sawing, bending, initial coil forming, annealing, finishing coil shaping, overall length cutting, drilling, heat treatment and shaping, mechanical Experiment, surface phosphating, etc., the preparation process is simple and easy to realize, the steel strip is not easily deformed or damaged during preparation, the process adopts a vacuum double-chamber quenching furnace, the degree of automation is high, the human intervention is less, the industrial quenching time is short, and the prepared product has no delamination. Carbon, no deformation, balanced temperature, stable metallographic structure, and stable torque output of the flat scroll spring after production.