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30results about How to "Achieve a smooth start" patented technology

Integrated hub motor and control method thereof

The invention provides an integrated hub motor and a control method thereof. The integrated hub motor comprises a motor shaft and a stator fixed on the motor shaft, wherein the stator is externally sheathed with a rotor casing; the front end and the rear end of the rotor casing are rotatablely fixed on the motor shaft by a rotor end cover and a bearing; two ends of the motor shaft protrude outside the rotor end cover to form a long end and a short end; a bearing end cover is fixed at the outer side of the rotor end cover; and the short end of the motor shaft is covered therein. The invention is characterized in that a bearing end cover shaft is arranged in the middle part of the bearing end cover in a protruding mode towards the direction of the motor shaft, and a position detection device is arranged at the corresponding position of the end part of the motor shaft and the bearing end cover shaft; the motor shaft is sheathed with a servo controller; and the position detection device senses rotation of the bearing end cover shaft and transmits the sensed signal to the servo controller to finally obtain the rotating angle or position of the rotor after being processed by the servo controller, thus achieving accurate control of the motor. The invention has the advantages of simple structure, energy conservation, good starting characteristic, small volume and high efficiency.
Owner:杭州桐聚科技有限公司

Hill starting sliding prevention control method and device and electronic equipment

The invention provides a hill starting sliding prevention control method and device and electronic equipment and relates to the technical field of automobile starting control. The hill starting sliding prevention control method comprises the steps of calculating a gradient desired torque and a driver desired torque which overcome gradient resistance when detecting that a vehicle carries out hill starting and an automatic hold AVH function of an electronic stability program ESP is started; transmitting a torque output instruction to a power system according to the gradient desired torque and the driver desired torque so that the power system carries out braking; calculating a current actual torque of the power system; and transmitting a control instruction to the ESP to control the vehicleto start according to the current actual torque, the gradient desired torque and the driver desired torque. According to the hill starting sliding prevention control method, the power system and the ESP are controlled in a coordinated manner to avoid a backward sliding phenomenon and realize stable starting of a hybrid vehicle on a ramp; the control delay and uncertainty are reduced; and the control performance is improved.
Owner:ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1

Wheel hub motor and control method thereof

The invention relates to a wheel hub motor and a control method thereof. The wheel hub motor comprises a motor shaft (1) and a stator (2), wherein a rotor shell (3) is sleeved outside the stator (2), and the front end and the back end of the stator (2) are rotatablely fixed on the motor shaft (1) through a rotor end cover (4) and a bearing (5); the outer side of the rotor end cover (4) is connected with a hub brake component (9); the rotor shell (3) is connected with a wheel hub (6); a position detection device is arranged at a position corresponding to the wheel hub motor, and comprises a retainer (7) which is fixed on the motor shaft (1) and a magnetic steel ring (11) which is fixed on the rotor end cover (4); a plurality of Hall elements (10) are arranged on the retainer (7); a servo controller (18) is arranged on the motor shaft (1); and the rotor end cover 94) and the motor shaft (1) rotate relatively. The wheel hub motor is simple in structure, energy-saving, high in starting characteristic, small in size, and high in efficiency.
Owner:ZHEJIANG ZHONGKE DERUN TECH

Software implementation method for starting runaway of high voltage inverter at fixed frequency

The invention discloses a software implementation method for starting a runaway of a high voltage inverter at fixed frequency. The method comprises the steps of: estimating the rotating speed of a motor which rotates freely without a speed sensor; starting to output a fixed frequency from a low voltage under the premise of controlling the current; slowly improving the voltage till the constant torque point arranged by a normal motor UF (Ultrasonic Frequency) curve; and slowly improving the torque through outputting fixed rotating speed by a stator under a rated current so as to realize synchronous rotation of the stator and a rotor. According to the invention, the rotating speed of the motor is estimated and the output current by the inverter is strictly limited, so that smooth start of the high pressure motor is realized when the rotor is no stationary by a way of slowly improving the torque by output at the fixed frequency.
Owner:ANHUI EHE NEW ENERGY TECH

Start control method for accessing synchronous compensator in high-voltage direct-current transmission inversion side

The invention discloses a start control method for accessing a synchronous compensator in a high-voltage direct-current transmission inversion side. By using the method, an excitation input value of the synchronous compensator at a start moment is changed, and after a system reaches a stable state at the first time, an exciter is used to carry out excitation input on the synchronous compensator. Adifference between a traditional synchronous compensator start method and the method of the invention is that the excitation input value at the start moment is changed. By using the start control method, a voltage fluctuation of a port when the synchronous compensator is started can be effectively reduced and active power consumed when the synchronous compensator is started and generated reactivepower can be decreased so that smooth start of the synchronous compensator can be realized.
Owner:STATE GRID JIANGSU ELECTRIC POWER CO LTD MAINTENANCE BRANCH +3

Range extender starting control method, range extender and electric vehicle

The invention discloses a range extender starting control method, a range extender and an electric vehicle and relates to the technical field of electric vehicles. After controlling a power generatorto pull an engine to rotate at a pulling torque, a range extender controller adjusts the pulling torque of the power generator according to an engine rotation speed obtained in real time till the engine is started. In the range extender starting process, the torque of the power generator is controlled on the basis of the range extender controller, different pulling torques are given for differentengine rotation speeds so that the pulling torque of the power generator to the engine is reduced with the increasing of the engine rotation speed to realize smooth starting of the engine; and therefore, shaking and noises caused by large rotation speed change in the starting process are avoided, the NVH performance of the electric vehicle is improved, and the prolonging of the service life of theengine is significant.
Owner:ZHEJIANG GEELY HLDG GRP CO LTD +1

Network voltage estimation method of single-phase pulsed rectifier

The invention discloses a network voltage estimation method of a single-phase pulsed rectifier. The network voltage estimation method comprises the steps: a single-phase pulsed rectifier system is divided into two power parts of active power and reactive power, and active power mathematical models and reactive power mathematical models of reference models in a model reference self-adaptation system are built; according to errors of the active power and the reactive power in the reference models and adjustable models, network voltage fundamental wave estimation values are obtained through a PIcontroller in the model reference self-adaptation system; a phase-locked loop is eliminated, and fundamental wave angle information and angle frequency of the network voltage are estimated through a network-side current and the active power and reactive power of the reference models; and a modulating voltage initial value of the rectifier is designed, and smooth starting of a control system is achieved. A model reference self-adaptation control idea is adopted, the active power mathematical models and the reactive power mathematical models of the reference models and the adjustable models arebuilt, and the network voltage of the single-phase pulsed rectifier without a network voltage sensor is accurately estimated.
Owner:SOUTHWEST JIAOTONG UNIV +1

Energy type router and soft charging control method and system thereof

ActiveCN110943634AAvoid overvoltage and voltage distortionSmooth chargingEfficient power electronics conversionAc-dc conversionEmbedded systemRouter
The invention discloses an energy type router and a soft charging control method and system thereof. The energy type router comprises a plurality of three-phase modular multilevel converters and DAB sub-modules, wherein the number of the DAB sub-modules is the same as that of the three-phase modular multilevel converters; the three-phase modular multilevel converters and the DAB sub-modules are connected in parallel to form a module group. The module group is connected to a high-voltage alternating-current side of a power grid; each of the three-phase modular multilevel converter and the DAB sub-module comprises a capacitor, a first capacitor and a second capacitor. Capacitors of the three-phase modular multilevel converters and the capacitors of the DAB sub-modules are charged based on acomparison result of the capacitor voltage of the three-phase modular multilevel converters and a preset voltage threshold and a target value. According to the invention, rapid and stable charging ofab AC-stage sub-module capacitor can be realized, the DC-stage DAB module charging does not need an additional circuit, the cost is saved, smooth starting of the output-side voltage is realized, andthe overall efficiency and stability of soft charging of the energy router system are further improved.
Owner:CHINA ELECTRIC POWER RES INST +2

Phase-shifted full-bridge converter, soft start method and soft start device thereof

The invention discloses a soft start method of a phase-shifted full-bridge converter. The phase-shifted full-bridge converter comprises a primary side full-bridge circuit, a secondary side synchronousrectification circuit and an active clamping circuit. The soft start method comprises the following steps of acquiring a minimum phase shift angle; calculating pWM waves corresponding to the three circuits according to the minimum phase shift angle, and setting each PWM wave to a corresponding PWM channel; obtaining a new phase shift angle according to a preset rule; and calculating PWM waves corresponding to the three circuits respectively according to the new phase shift angle, setting each PWM wave to a corresponding PWM channel, and then executing the step of obtaining the new phase shiftangle until a soft start ending condition is met to end soft start. The invention further discloses a soft start device of the phase-shifted full-bridge converter and the phase-shifted full-bridge converter comprising the soft start method and the soft start device. The soft start method can realize smooth start of the converter and is suitable for different types of loads, so that the universality of the converter can be improved. The competitiveness of the converter is enhanced.
Owner:SHANGHAI KOSTAL HUAYANG AUTOMOTIVE ELECTRIC +1

Hybrid power converter and control method thereof

The invention discloses a hybrid power converter and a control method thereof. The hybrid power converter comprises a first group of switching elements, an inductor and a switched capacitor network which are sequentially connected between a first end and a second end of the hybrid power converter. The first group of switching elements are controlled to be switched on and switched off according toa first group of control signals, so that the connection state of the first end of the hybrid power converter is periodically changed; the switched capacitor network comprises a second group of switching elements and a plurality of capacitors; on and off of the second group of switching elements are controlled according to the second group of control signals so as to periodically change charging and discharging states of the inductor and the plurality of capacitors. The hybrid power converter adjusts duty cycles of the first group of control signals and the second group of control signals, respectively, to convert the input voltage to a desired output voltage. The hybrid power converter can improve the output voltage regulation capability of the circuit, realize circuit miniaturization andimprove the conversion efficiency of the circuit.
Owner:杭州艾诺半导体有限公司

Slewing mechanism

InactiveCN104118806ASmooth startAvoid inertia shockCranesClutchElectrical control
The invention relates to a slewing mechanism and particularly relates to a slewing mechanism for the fields of tower cranes. The invention provides the slewing mechanism which is simple in structure and low in cost, and is capable of realizing stepless speed adjustment, stably starting and braking and reducing impacts to a crane boom and a tower body. The slewing mechanism comprises an alternative current (AC) motor, a slewing speed reducer, an electromagnetic eddy clutch, an electromagnetic eddy brake, a middle electric pivot, an electric control system and an operation platform. During starting, the middle electric pivot is smoothly started by virtue of the comprehensive actions of the electromagnetic eddy clutch and the electromagnetic eddy brake; the inertial impact during starting is avoided; during braking of the slewing mechanism, the brake time of the slewing mechanism is prolonged by virtue of the electromagnetic eddy clutch and the electromagnetic eddy brake; the stable transition of the slewing mechanism from a motion state to a motion state is realized and the impacts to the crane boom and the tower body during braking are reduced.
Owner:SICHUAN CONSTR MACHINERY GRP

Dragging torque control method and system

The invention discloses a dragging torque control method and system. The method comprises the steps that in a starting process of an engine, the change rates of different dragging torques in all intervals are controlled according to the different engine rotating speed intervals, thus the dragging torques of a generator to the engine are reduced along with rising of the rotating speed of the engine, smooth starting of the engine is achieved, jitter and noise caused by large rotating speed change in the starting process are avoided, meanwhile, the abrasion risk of a bearing bush of the engine is considered, the maintaining time of the engine at the low rotating speeds is prolonged, dragging torque segmented control is achieved, the NVH performance of an electric automobile is improved, and the dragging torque control method and system have important significance to prolonging of the service life of the engine.
Owner:DONGFENG MOTOR GRP

Hybrid power converter and control method thereof

ActiveCN111682756AImproved output voltage regulationReduce Inductor SizeApparatus without intermediate ac conversionCapacitanceDuty cycle
The invention discloses a hybrid power converter and a control method thereof. The hybrid power converter comprises an inductor connected to a first end of the hybrid power converter, and a switched capacitor network is connected between the inductor and the second end of the hybrid power converter, wherein the switched capacitor network comprises a plurality of switching elements and a pluralityof capacitors; the switching elements are controlled to be turned on and off according to a plurality of control signals so as to periodically change connection paths of the plurality of capacitors such that the inductor and the plurality of capacitors are charged and discharged, the hybrid power converter adjusts a duty cycle of the control signal so as to convert an input voltage into a desiredoutput voltage. The hybrid power converter can improve the output voltage regulation capability of the circuit, realize circuit miniaturization and improve the conversion efficiency of the circuit.
Owner:杭州艾诺半导体有限公司

Base station external power grid capacity increasing and voltage stabilizing system and method

The invention discloses a base station external power grid capacity increasing and voltage stabilizing system and method. A power grid end, a power supply line and a base station end are connected insequence. The system comprises a structure I or a structure II; according to the first structure, a boosting module is connected between the power grid end and the power supply line in series; and according to the second structure, a boost module is connected in series between the power grid end and the power supply line, and a buck module is connected in series between the base station end and the power supply line. The boost module comprises one or more boost unit for outputting different gear voltages and one or more change-over switch, and the change-over switch controls the correspondingboost unit to be connected with or not connected with the power supply line. Voltage stabilization and capacity increase transformation is carried out without changing an existing external power gridline structure, the structure 1 ensures the working stability of base station equipment, and the power supply efficiency is improved; and the second structure can perform capacity increasing and voltage stabilizing transformation on an existing power supply network. The boost units with different voltage gears can be switched for boosting according to the amplitude change of the base station load,so that the base station load is prevented from overvoltage damage.
Owner:重庆瑞盾科技发展有限公司

Integrated hub motor

An integrated hub motor and a control method thereof. The motor includes a motor shaft (4) and a stator (12) fixed on it. A rotor housing (10) is provided around the stator (12). The front and back sides of the rotor housing (10) are rotatablely mounted on the motor shaft (4) by rotor end caps (8, 14) and bearings (6, 19). The two ends of the motor shaft (4) are extended out of the rotor end caps (8, 14) to form a short end and a long end. A bearing cap (1) is mounted on the outside of the rotor end cap (8) and covers the short end of the motor shaft (4). A bearing cap shaft (26) is provided on the center of the bearing cap (1) and projected out of the center of the bearing cap (1). The bearing cap shaft (26) is projected toward the direction of the motor shaft (4). Position detection devices (3) are provided on the corresponding positions of the end of the motor shaft (4) and the bearing cap shaft (26). A servo controller (11) is mounted around the motor shaft (4). The position detection devices (3) detect the rotation of the bearing cap shaft (26) and then transmit a detected signal to the servo controller (11). A rotation angle or position of the rotor is obtained through the process of the servo controller (11) so as to accurately control the motor. The motor has advantages of simple structure, energy-saving,excellent starting characteristic, small size and high efficiency.
Owner:杭州桐聚科技有限公司

Active starting circuit of Boost full-bridge isolation converter and method

The invention relates to an active starting circuit of a Boost full-bridge isolation converter and a method. An active switch Q6 and a resistor R constitute a low-loss active starting circuit of the circuit. In the starting process of the converter, the active starting circuit releases energy stored in a boost inductor by turning on the switching device Q6, the problem of inductor energy saturation in the starting process of the converter is thus solved, and the converter can be normally started. The switching device Q6 in the active starting circuit only works in the starting state of the converter. When the converter works in a working steady state, the switching device Q6 is turned off, and the conversion efficiency of the circuit will not be influenced.
Owner:INST OF ELECTRICAL ENG CHINESE ACAD OF SCI

Intelligent controller on kitchen fan and control method thereof

The invention discloses an intelligent controller on a kitchen fan and a control method thereof. The controller can realize the time-sharing on-off control to the IGBT through the SPWM algorithm or the V / F algorithm according to the data of a lampblack concentration sensor, and outputs different frequencies and voltage, so as to adjust the running frequency of the fan. The SPWM or the V / F is adopted to control the fan, so that the fan can be smoothly started, and the impact current when a traditional motor starts is completely eliminated; and the SPWM algorithm or the V / F algorithm is adopted,and harsh noise of a motor is reduced through changing the switching frequency, so as to be more suitable for the auditory system of people; the running current of the fan can be detected in real time, and further, the real-time power and the energy conservation proportion can be effectively monitored in real time.
Owner:GUANGZHOU HEDY INTELLIGENT EQUIP CO LTD

Ceiling fan motor control method, device and ceiling fan based on non-inductive foc

The invention discloses a ceiling fan motor control method and device based on non-inductive FOC, and a ceiling fan. The ceiling fan includes a non-inductive FOC controller, a motor position detector for detecting the initial position of the motor rotor when the ceiling fan is stationary, and a motor position detector for collecting ceiling fan motor operation. The current acquisition circuit of the current, the ceiling fan motor control method based on the non-inductive FOC includes: the target operating current of the ceiling fan motor is preset to zero through the non-inductive FOC controller, and the current operating current of the motor collected by the current acquisition circuit is obtained; When the current working current determines that the motor is currently in a reverse state, the control motor enters a static state; the non-inductive FOC controller obtains the initial position of the motor rotor when the ceiling fan motor detected by the motor position detector is in a static state; according to the obtained motor rotor initial position and The target operating current of the ceiling fan motor controls the motor operation. The technical scheme of the invention realizes smooth start-up without reverse rotation of the motor in the ceiling fan.
Owner:FORTIOR TECH SHENZHEN

A method for estimating network voltage of single-phase pulse rectifier

The invention discloses a network voltage estimation method of a single-phase pulsed rectifier. The network voltage estimation method comprises the steps: a single-phase pulsed rectifier system is divided into two power parts of active power and reactive power, and active power mathematical models and reactive power mathematical models of reference models in a model reference self-adaptation system are built; according to errors of the active power and the reactive power in the reference models and adjustable models, network voltage fundamental wave estimation values are obtained through a PIcontroller in the model reference self-adaptation system; a phase-locked loop is eliminated, and fundamental wave angle information and angle frequency of the network voltage are estimated through a network-side current and the active power and reactive power of the reference models; and a modulating voltage initial value of the rectifier is designed, and smooth starting of a control system is achieved. A model reference self-adaptation control idea is adopted, the active power mathematical models and the reactive power mathematical models of the reference models and the adjustable models arebuilt, and the network voltage of the single-phase pulsed rectifier without a network voltage sensor is accurately estimated.
Owner:SOUTHWEST JIAOTONG UNIV +1

Anti-rolling car control method, device and electronic equipment when starting on a hill

The invention provides a hill starting sliding prevention control method and device and electronic equipment and relates to the technical field of automobile starting control. The hill starting sliding prevention control method comprises the steps of calculating a gradient desired torque and a driver desired torque which overcome gradient resistance when detecting that a vehicle carries out hill starting and an automatic hold AVH function of an electronic stability program ESP is started; transmitting a torque output instruction to a power system according to the gradient desired torque and the driver desired torque so that the power system carries out braking; calculating a current actual torque of the power system; and transmitting a control instruction to the ESP to control the vehicleto start according to the current actual torque, the gradient desired torque and the driver desired torque. According to the hill starting sliding prevention control method, the power system and the ESP are controlled in a coordinated manner to avoid a backward sliding phenomenon and realize stable starting of a hybrid vehicle on a ramp; the control delay and uncertainty are reduced; and the control performance is improved.
Owner:ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1

Method for providing given frequency in motor starting phase

The invention provides a method for providing given frequency in a motor starting phase. The method is characterized by at least comprising a beginning phase and an ending phase in the starting process of the motor; in the beginning phase, the given frequency is provided at continuously-increasing acceleration, the given frequency and the acceleration of the given frequency are zero at the beginning of the beginning phase; in the ending phase, the given frequency is provided at the continuously-decreased acceleration; and the given frequency is increased to target frequency and the acceleration of the given frequency is decreased to zero in the end of the ending phase. In the invention, the starting phase of the motor is divided into the beginning phase and the ending phase, the accelerations of the given frequency are zero when the beginning phase is started and the ending phase is ended, the problem that an electric fence generates the impact by using the traditional linear acceleration method due to the mutation of the acceleration can be solved, the smooth starting of the motor can be realized, the starting current can be reduced, the starting overcurrent tripping can be avoided and thereby the performance of the motor can be fully exerted.
Owner:CHINA CNR LIMITED DALIAN ELECTRIC TRACTION R&D CENT

Hybrid Power Converter

ActiveCN111682755BImproved output voltage regulationThe volt-second product decreasesApparatus without intermediate ac conversionCapacitanceControl signal
The present application discloses a hybrid power converter. The hybrid power converter includes: a first switch network, connected to the first end of the hybrid power converter, including a first group of switching elements, and controlling the first group of switching elements to be turned on and off according to a first group of control signals an inductor connected to one of the connection nodes between the first set of switching elements; a switched capacitor network connected between the inductor and the second terminal of the hybrid power converter, comprising a second set of switching elements and a second set of capacitors, and The switching elements of the second group are controlled to be turned on and off according to the second group of control signals, thereby periodically changing the charging and discharging states of the inductor and the second group of capacitors, and the hybrid power converter adjusts the first group of control signals and the second group of capacitors respectively. The duty cycle of the two sets of control signals converts the input voltage to the desired output voltage. The hybrid power converter can improve the output voltage regulation ability of the circuit, realize the miniaturization of the circuit and improve the conversion efficiency of the circuit.
Owner:杭州艾诺半导体有限公司
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