44results about How to "Smooth torque output" patented technology

The invention relates to a default phase fault tolerance driving system of an open winding motor. A head end and a tail end of a common three-phase motor winding are cascaded with two nominal electrical level inverters; after a fault happens in a one-phase winding open circuit, two switches on a fault phase upper bridge arm are online locked; two switching tubes of a lower bridge arm are normally driven by 1; and through the modulation of phase current reconstruction and effective redundancy switch vector reconstruction, a stable torque output is retained, the default phase fault tolerance operation of the driving system is realized and the requirements on the system continuous operation capability of the high-reliability application field such as electric automobiles are satisfied. Through the design of dual power supply, the danger of a common-mode voltage and a zero-sequence current to electric components and motors is eliminated. The device comprises a primary direct-current voltage source (1), a primary capacitor (2), a primary inverter (3), a secondary direct-current voltage source (4), a secondary capacitor (5), a secondary inverter (6), a three-phase motor (7) and a redundant switch vector (8); the primary inverter is connected to the head end of the three-phase motor winding and the secondary inverter is connected to the tail end of the motor winding.

The invention discloses a default phase fault-tolerant control method of a nine-phase flux-switching permanent magnetic motor. The default phase fault-tolerant control method includes that redundancy characteristics and harmonic current of a nine-phase system are utilized to compensate a fault-tolerant control strategy; when a motor winding or a driving system is in a default-phase failure caused by one-phase circuit breaking or circuit shorting, by online calculating third, fifth and seventh harmonic current momentary values under copper loss minimum boundary conditions in real time and performing closed-loop decoupling control on the harmonic current, the motor can be smoothly transited from a nine-phase normal state to an eight-phase fault state and maintain both output rotating speed and rotating torque to be unchanged, undisturbed running of the driving system is realized, and requirements, of high-reliability application fields like track traffic and electromobiles, on system continuous running capability are met; during designing of the nine-phase flux-switching permanent motor, electromagnetic torque pulsation rate is lowered while high torque density of the special motor is retained.

The invention discloses a car anti-shake method and system, and a motor controller. The torque command compensation amount corresponding to the motor rotation speed is used as a negative feedback signal to be introduced into a torque control loop, so that compensation of an original torque demand value is avoided; and the torque command compensation amount and the original torque demand value are used as torque controlled variables together, so that the purpose of smooth torque output is achieved, and the problem that a car shakes due to incomplete attachment of an assembly transmission part during acceleration of the car is solved.

The invention discloses a harmonic cancellation PWM generation method, and the method comprises the steps: dividing the modulation frequency into three parts in a variable frequency speed regulation range: first and second low-frequency operation stages and a middle-high frequency operation stage; respectively an SVPWM asynchronous modulation mode and an SVPWM synchronous modulation mode, which are fixed through employing carrier frequency, at the first and second low-frequency operation stages; carrying out the frequency point control of the above two modulation modes when the synchronous carrier frequency and the set asynchronous carrier frequency are consistent; enabling the second low-frequency operation stage to be carried out at a plurality of different synchronization multiples; employing a mode of dividing each cyclic wave into a plurality of executed harmonic waves equally to eliminate an SHEPWM mode at the middle-high frequency operation stage; reading a current angle before switching, and calculating the time delay when operating to 90 degrees or 270 degrees so as to achieve the switching between the synchronous modulation mode and a harmonic cancellation mode. The method is easier to implement a specific harmonic cancellation algorithm, and increases the response speed and precision.

The invention relates to a shock-absorption buffer shaft. The shock-absorption buffer shaft comprises an input shaft, an input end cover, a force transfer pin, an input toothed sleeve, an input toothed wheel, a double toothed wheel, a spring, an output toothed sleeve, an output toothed wheel, an output shaft, an output end cover, a limiting bolt, a fastening bolt and an external sleeve. Force is transferred to the input toothed sleeve by virtue of the teeth of the first internal toothed ring of the input toothed sleeve in a manner of compressing a spring through the teeth of an external toothed ring on the input toothed wheel, later the force is transferred to the double toothed wheel by virtue of the teeth of the first external toothed ring of the double toothed wheel in a manner of compressing the spring through the teeth of the second internal toothed ring of the input toothed sleeve, then the force is transferred to the output toothed sleeve by virtue of the teeth of the first internal toothed ring of the output toothed ring in a manner of compressing the spring through the teeth of the second external toothed ring of the double toothed wheel, and then the force is transferred to the output toothed wheel by virtue of the teeth of the external toothed ring of the output toothed wheel in a manner of compressing the spring through the teeth of the second internal toothed ring of the output toothed sleeve, and finally, the output toothed wheel is used for transmitting the torque by virtue of the force transfer pin through the output shaft.

A method of manufacturing an induction motor rotor assembly, the method includes the steps of: providing a rotor; machining a plurality of re-entrant slots axially along an outer surface of the rotor; positioning a sleeve concentrically over the outer surface of the rotor; applying a friction stir welding process to the sleeve along each re-entrant slot axially along the outer surface of the rotor to cause the sleeve material to plasticise and flow into the axial re-entrant slot to form an axial re-entrant slot bar; and providing an electrical connection at each of the opposing axial ends of the rotor between respective ones of opposing ends of each of the axial re-entrant slot bars to thereby form the induction motor rotor.

The invention discloses a gear transmission stepless speed changer. In a power transmission mechanism, please refer to the drawing 4 of the specification, power drives totally three power transmissionsynchronous gears which are arranged on the two sides of and between an input cone roller spiral strip-shaped gear and an output cone roller spiral strip-shaped gear and can move back and forth on three synchronous spline shafts for transmission through rotation of the input cone roller spiral strip-shaped gear, accordingly, the output cone roller spiral strip-shaped gear is driven to rotate, andthen a deceleration gear is used for driving a differential mechanism left half shaft and a right half shaft to output power torque. In a speed changing mechanism, please refer to the drawing 4 of the specification, rotation speed adjustment is achieved in the manner that a speed adjusting servo motor is utilized for driving a synchronous speed adjusting bevel gear to rotate, then, a synchronousspeed adjusting lead screw is driven to rotate, a synchronous speed adjusting shifting fork matched with the synchronous speed adjusting lead screw is driven to move back and forth in the axial direction of the synchronous speed adjusting lead screw, finally, the power transmission synchronous gears are driven to move back and forth on the three synchronous spline shafts at different meshing diameter positions between the input cone roller spiral strip-shaped gear and the output cone roller spiral strip-shaped gear, and accordingly different output rotation speeds are obtained.

The invention discloses an engine intake control method of a hybrid power vehicle. A hybrid power control unit receives a pedal signal input by a driver and outputs a target torque value of an engineto an intake control module; the intake control module compares the target torque value and the size of a control strategy switch threshold, and sets control parameters of a throttle valve and a bypass valve; and a torque estimation module acquires an operating state parameter of the engine, calculates an estimation torque value, and feeds back to the hybrid power control unit and the intake control module. Through the engine intake control method provided by the invention, the engine can quickly respond and meets the requirement on a torque following performance of the hybrid power control unit, in addition, in the transient process, the engine intake amount fluctuation is small, and the torque output is stable.

The invention relates to a double-disc type motor electric stepless speed change mechanical-electrical integration system. The system comprises a shell, a planet wheel, a sun wheel, an input shaft, aplanet carrier, a gear ring carrier, a gear ring, an output shaft, a hollow shaft, an ISG motor stator, an ISG motor stator, an ISG motor rotor, a main drive motor stator, a main drive motor rotor anda main drive motor stator; the ISG motor stator and the ISG motor rotor form an ISG disc type motor; the main drive motor stator and the main drive motor rotor form a main drive motor with a double-stator structure; the output shaft penetrates through the hollow shaft; supporting bearings are arranged between the front end and the rear end of the hollow shaft and the output shaft; the sun wheel,the planet wheel and the gear ring form a planet row; the ISG motor stator and the main drive motor stator are connected together and are connected with the hollow shaft through the support bearings;an ISG motor stator side shell is connected with the hollow shaft through the supporting bearing; a main drive motor stator side shell is connected with the output shaft through the supporting bearing. The system of the invention has the advantages of compact structure, high power density, high system efficiency and outstanding NVH characteristics.

The invention discloses an engine air inlet system with continuously variable air inlet resistance, an engine air inlet adjusting method and an engine. The system comprises a fixed air outlet pipe and a moving air outlet pipe capable of moving relative to the fixed air outlet pipe; the fixed air outlet pipe is fixed on an air inlet component of the engine; the moving air outlet pipe is mounted in the air inlet component; and an operating mechanism is arranged on the moving air outlet pipe and can control the moving air outlet pipe to move, so that the moving air outlet pipe makes contact with and is connected with the fixed air outlet pipe and is gradually separated from the fixed air outlet pipe. With the engine air inlet system with the continuously variable air inlet resistance, the engine air inlet adjusting method and the engine, smooth torque output is realized, the air inlet resistance has the relatively large change range and is fast in response relative to the displacement of the moving air outlet pipe, the action distance is short, and the requirement for arrangement space is not high.

The invention discloses a system and a control method for setting a torque request based on a mobile terminal . A vehicle torque request mode and/or forced kinetic energy recovery mode data is set atthe mobile handheld terminal; the mobile handheld terminal transmits the set vehicle torque request mode and/or forced kinetic energy recovery mode data to a cloud server through wireless communication; the cloud server transmits the data to a vehicle-mounted intelligent control module; a vehicle control unit receives the data of the vehicle-mounted intelligent control module and sends the data toa motor controller; and the motor controller controls the motor to output torque according to set data. According to the invention, different torque modes are set on the handheld mobile terminal, sothat a driver can obtain the driving force output mode with the optimal driving feeling through simple adjustment, and better driving experience can be brought to the driver. Meanwhile, the manual setting supported by the mobile terminal provides convenience for the driver to operate in different scenes, so that the driver can use the vehicle more leisurely.

The invention discloses a torque control optimization method of an electric vehicle based on a driving mode, which is characterized in that the driving mode is firstly defined, and the method specifically comprises the following steps: 101, disassembling common driving working conditions including ejection starting, crawling, accelerator stepping acceleration, accelerator loosening sliding, brake stepping deceleration, cruise acceleration and deceleration and driving mode switching in each working condition; 102, splitting functions of the torque chain according to working conditions; 103, under different driving modes, involving the different driving modes in each torque chain link of torque chain function splitting, and optimizing torque control logic; and 104, calibrating and optimizing the parameters in all the control. According to the method, factors of influence of a driving mode on the torque chain are fully considered, and an integral framework intervening in the torque chain is designed; a sufficient conversion mechanism is achieved for the torque characteristics of the electric vehicle, the requirements of different drivers are met, and meanwhile, torque output is smoother and the driving feeling is better in combination with the driving working condition during different modes and mode switching.

The invention relates to an automobile motor torque limiting method and device, a vehicle controller and a system. The method comprises the following steps that when an automobile battery allowable power is less than a preset power threshold, and when a speed change rate of an automobile motor is greater than zero, a motor torque limiting value is obtained according to a predicted motor speed andthe automobile battery allowable power; the predicted motor speed is the sum of a predicted speed increment and an automobile motor speed at the current moment; the predicted speed increment is the product of the speed change rate of the automobile motor and a predicted time; and the torque output of the automobile motor is limited on the basis of the motor torque limiting value. According to theautomobile motor torque limiting method and device, the vehicle controller and the system, the sudden change of the torque limiting value of the motor can be smoothed, the fluctuation of the torque output of the motor is reduced, and the smoothness of driving is improved.

The invention discloses a direct-drive type disc spring energy storage and return type linear-motion quick shut-off performing mechanism. The direct-drive type disc spring energy storage and return type linear-motion quick shut-off performing mechanism comprises a power mechanism, a power switching mechanism, a transmission system and an energy storage and return mechanism, wherein the power mechanism drives the transmission system to realize motion output; the power mechanism comprises an electric drive system and a manual operation system; the power switching mechanism is used for realizingswitching between the electric drive system and the manual operation system; and the energy storage and return mechanism is used for performing shut-on and shut-off on an electric performing mechanismwhile the electric drive system is shut off. An alternating-current servo motor drives a nut to rotate under a shut-on condition, so that a lead screw moves up and down; and under a sudden power-losing condition, the motor and an electromagnetic brake are shut off, the lead screw nut is in a free moving station, a disc spring energy storage mechanism releases elastic potential energy to push thelead screw to move upwards, so that quick shut-off is realized.

The invention discloses an integrated PCB winding disc type motor system. According to the integrated PCB winding disc type motor system, the upper rotor disc, the lower rotor disc and the stator discform a double-side permanent magnet disc type motor structure, single-side magnetic pull force can be overcome, magnetic flux leakage is reduced, permanent magnet materials are fully utilized, the motor performance is improved, the cost is reduced, the size is reduced, the axial size is short, and the structure is compact; and the system is suitable for occasions with strict requirements on placement space. According to the disc type motor system, the stator and the rotor are arranged in a peer-to-peer mode, heat dissipation is good, and high power density can be obtained. In addition, the adjustable mechanism additionally arranged on the rotating shaft can realize the adjustability of the upper and lower air gaps of the motor, and can facilitate the expansion and adjustment of the numberof layers of the integrated PCB winding structure, so that the performance of the motor is optimal.

The invention relates to a disc motor which is provided with an armature and symmetrically mounted magnetic steel assembly components. The armature is mounted between the symmetrically mounted magnetic steel assembly components and composed of more than two groups of stacked coil windings. Each of the magnetic steel assembly components is composed of a magnetic steel mounting disc and sectorial magnetic steels surrounding into a coil, a motor magnetic steel disc with a motor mounting shaft hole opened is arranged at the center of the magnetic steel mounting disc, and the magnetic steel mounting discs and the motor magnetic steel disc are in integrated structures. The coil windings are formed of six coils surrounded into winding coils, and the more than two groups of stacked coil windings are overlapped vertically. According to the disc motor, the small mounting size of the motor can be maintained, the motor power is effectively improved, and accordingly, a high-power small-size motor is obtained, and the application range is wide.