1944 results about "Motor controller" patented technology

The invention provides a test method and device for a motor active short-circuit relay, and a storage medium. The method includes the steps: performing the zero speed detection of a motor after a motor controller completes a low-voltage power-on operation, wherein when the motor controller is powered down, a first relay and a second relay are both switched on; controlling the second relay to be turned on if the motor passes the zero speed detection, and injecting a first excitation signal at the control ends of a first phase winding and a third phase winding through the motor controller; performing injection detection of the first excitation signal to determine whether the first excitation signal is successfully injected or not; controlling the first relay to be turned on if the first excitation signal is successfully injected, and obtaining a voltage across two ends of the first relay; and judging whether the power-on test of the first relay is successful or not according to the voltage across two ends of the first relay. The method can realize the turn-on test of the short-circuit relay, and ensures the reliability of the active short-circuit function of the vehicle motor duringdriving.

The invention discloses a short-circuit current limiting and short-circuit recovery transient voltage control device and method for an aviation three-stage power generation system, and the device comprises a three-stage power generator, a power generator controller, a current sensor, a voltage and current collection module, and an asymmetric half-bridge excitation control circuit. Collecting the output current iL and voltage UL of the generator through a digital processor of the generator controller; when short circuit occurs, the given voltage USet of the voltage regulating loop is linearly reduced in a piecewise mode according to the relation between the iL and a preset threshold value, so that the generator works in a constant power interval; and when the short circuit is recovered, closing the upper / lower power tubes of the asymmetric half-bridge excitation control circuit according to the relationship between UL and a preset threshold value in a grading manner, and triggering a negative-pressure follow-current mode of a main excitation winding of the generator controller to quickly extinguish the field. The method can adapt to different generators without adjusting hardware circuit parameters, has no motor ablation risk during short circuit, has transient voltage less than 350V after short circuit recovery, has no power supply interruption in the whole process, has response delay less than 1ms, and greatly improves the safety and robustness of an aviation power supply and distribution system.

The utility model discloses a motor controller, a motor control circuit, a discharge system, a whole vehicle control system and an automobile. The motor controller comprises a plurality of first bridge arms and further comprises a first inductor and / or a second inductor. The first ends of the plurality of first bridge arms are connected with the positive electrode of the power battery through the first switch and are connected with the first end of the direct-current charging port; the second ends of the plurality of first bridge arms are connected with the negative electrode of the power battery and the second end of the direct current charging port; the first end of the first inductor is connected with the midpoint of a first bridge arm, and the second end of the first inductor is connected with the positive electrode of the power battery through the second switch; the first end of the second inductor is connected with the midpoint of a first bridge arm, and the second end of the second inductor is connected with the first end of the direct current charging port through a third switch, so that a power battery can perform direct connection charging, boost charging or buck charging on an electric load, the first bridge arm is multiplexed, and switching of different discharging functions is realized by adding the inductors and the switches; the circuit is simple in structure, small in size and low in cost.

The invention relates to the technical field of aircraft design, in particular to a general aircraft parallel hybrid power system which comprises a driving motor, a power system and a power system. The motor controller is connected with the driving motor and controls the driving motor; the turbocharged engine is connected with the generator and drives the generator to generate electricity, and the generator is connected with the motor controller; the power battery is connected with the motor controller; and the turbocharged engine and / or the power battery are / is controlled by the motor controller to supply power to the driving motor. The invention further relates to a control method of the system. When the energy demand of the aircraft is larger than 200 kW, the turbocharged engine and the power battery are connected in parallel to supply power to the driving motor; when the energy demand of the aircraft is 60-200 kW, the power battery is cut off, and the turbocharged engine independently supplies power to the driving motor; and when the energy demand of the aircraft is less than 60kW, the turbocharged engine is turned off, and the power battery independently supplies power to the driving motor. And light weight and low cost are realized.

An electric motor may include a motor housing. An electric motor may include a shaft that extends in a longitudinal direction through a length of the motor housing, a first motor disposed within the motor housing and mounted to the shaft, a second motor disposed within the motor housing and mounted to the shaft. An electric motor may include an adaptor disposed within the motor housing, where a portion of the first motor and a portion of the second motor are disposed within the adaptor and the adaptor supports and pilots the first motor and the second motor. An electric motor may include at least one motor controller disposed on the adaptor and within the motor housing, the at least one motor controller electrically connected to the first motor and to the second motor.

This invention provides a random frequency conversion control method for NVH (Noise, Vibration, and Harshness) of a motor controller in a pure electric vehicle. The method includes: simulating the full throttle pedal condition of the entire vehicle on an electric drive test bench to eliminate tire noise and wind noise interference, thereby obtaining a spectrum diagram of the NVH of the electric drive system at the IGBT base frequency under the full throttle pedal condition; analyzing the spectrum diagram to identify the prominent NVH noise range under the full throttle pedal condition, and using this prominent NVH noise range as the entry condition for random frequency conversion; establishing corresponding random frequency conversion models for different prominent NVH noise ranges based on the base frequency of the IGBT switching frequency, to perform random frequency conversion control on the prominent NVH noise ranges, and using the base frequency of the IGBT switching frequency for control in the non-prominent noise ranges. This invention can reduce the switching frequency noise of the motor controller and improve the NVH performance and safety of electric vehicles.

The invention relates to the field of electric drive rotation control, in particular to an electric drive rotation system, a control method and engineering machinery. The electrically-driven rotary system comprises a frame; the rotary table is mounted on the frame through a rotary support, and the control cabin and the rotary table are connected and synchronously rotate; the rotary motor is used for driving the rotary table to rotate relative to the frame through the rotary speed reducer and the rotary support, and the rotary motor is in communication connection with the motor controller; an angle sensor configured to detect a rotation angle of the turntable relative to the frame; the vehicle-mounted controller is in communication connection with the motor controller, a rotary handle in the control room and the angle sensor; the equivalent rotating speed capable of representing user perception in the control room is obtained through the rotating angle, collected by the angle sensor, of the rotary table, and closed-loop control over the speed of the electric rotary system is achieved with the equivalent rotating speed, the request rotating speed of the rotary handle and the target rotating speed of the rotary motor as control parameters. And rotation shaking caused by a gear meshing clearance is reduced.

An assembly is provided for an aircraft powerplant. This assembly includes an electric machine, an electric machine controller, an electric cable, a conduit and an air circuit. The electric machine controller is configured to control operation of the electric machine. The electric cable electrically couples the electric machine controller to the electric machine. The conduit extends longitudinally from a first end of the conduit to a second end of the conduit. The electric cable extends longitudinally through a bore of the conduit. The air circuit is configured to cool the electric cable within the conduit using a flow of air. The air circuit includes the bore of the conduit.

The invention discloses a new energy fracturing truck pump flow control system and method and a fracturing truck, and belongs to the technical field of new energy petroleum equipment.The new energy fracturing truck pump flow control method comprises the steps that pump target flow parameters and an engine mode are received; calculating the target rotating speed of the pump motor, and sending the target rotating speed of the pump motor to a pump main motor controller; the feedback real-time torque value and real-time rotating speed are received and sent to the pump slave motor controller; calculating the total input target power of the pump motor; calculating a generator output target total power based on the pump motor input target total power; determining a generator target speed based on the engine mode and the generator output target total power; based on the generator output target total power, calculating generator input target total power; and calculating a generator target torque based on the generator input target total power and the generator target speed, and sending the generator target torque to a generator controller. According to the invention, pump flow multi-mode control or / and stepless real-time intelligent flow regulation is realized.

The invention relates to the field of automobile electronic control, in particular to a running state monitoring method for a vehicle motor controller, which comprises the following steps: S0, determining a key running signal needing to be continuously monitored; the communication format of the key operation signal on a vehicle-mounted CAN bus is defined; the method comprises the following steps: S1, constructing and deploying an embedded operation event recording system in a motor controller; s2, after the motor controller is powered on and runs, the embedded running event recording system constructed in the S1 is started, and recording of the running event is completed; s3, continuously monitoring and accumulating the power-off dormancy times of the motor controller through the storage aging management module; and executing an erasing operation on the special storage block. According to the method, reliable storage and on-demand return of key event data can be realized on the premise of not depending on an external debugging interface and not increasing significant hardware cost, so that effective monitoring of the working state of the motor controller is realized.

The invention provides an axle heat dissipation system of a distributed electric drive chassis and a control method, and belongs to the technical field of heavy new energy automobiles. The number of the heat dissipation modules corresponds to that of the drive axles, and each heat dissipation module comprises a heat dissipation device, a heat dissipation fan, an electronic water pump, a temperature sensor and a heat dissipation controller; each heat dissipation module is independently arranged on the outer side, close to the corresponding drive axle, of the frame, and the air outlet direction of each heat dissipation module is the side direction of the frame; a water outlet of the radiator, the electronic water pump, a cooling flow channel of the motor controller, a cooling flow channel of the driving motor and a water inlet of the radiator are sequentially communicated in series through a connecting pipeline to form an independent cooling circulation loop; the heat dissipation controller of each heat dissipation module is connected with the temperature sensor and the heat dissipation fan and used for adjusting the rotating speed of the heat dissipation fan according to temperature signals collected by the temperature sensor. The distributed heat dissipation modules are adopted and independently serve all the drive axles, and space arrangement is optimized.

The invention discloses a method and a system for estimating direct-current bus current of an electric vehicle. The method comprises the following steps: acquiring a d-axis voltage instruction, a d-axis current, a q-axis voltage instruction and a q-axis current of a motor side; compensating the d-axis voltage instruction and the q-axis voltage instruction based on parameters including voltage delay time to obtain a compensated voltage value; calculating the electromagnetic power of the motor based on the compensated voltage and current; the loss power of hardware in the motor controller is obtained, and the direct current side power is calculated in combination with the electromagnetic power; and calculating a direct current bus current estimation value based on the direct current bus voltage and the direct current side power. According to the method, processing is carried out under the dq coordinate system, the operation requirement of the controller is reduced, the power calculation error is corrected through voltage compensation and system loss compensation, high-precision and low-cost direct current bus current estimation is achieved under the condition that an additional hardware sensor is not needed, and the control precision and reliability of an electric drive system are improved.

A golf vehicle includes a chassis, a front axle coupled to the chassis, a rear axle coupled to the chassis, a battery pack supported by the chassis and including a plurality of battery cells, an electric motor powered by the battery pack, and a vehicle control system. The vehicle control system includes a battery management system coupled to the battery pack and a motor controller coupled to the electric motor and the battery management system. The battery management system is configured to monitor the battery pack, detect a fault, and trigger a discharge protocol for the battery pack in response to the fault to prevent an overcharge condition. The motor controller is configured to provide direct current power from the battery pack to the electric motor to discharge the battery pack in response to the discharge protocol.

An apparatus comprising a plurality of power feeder cables (136) for transferring power between an electrical machine (128) located within an engine core of a gas turbine engine (102) and power controllers (132) located on a fan casing (138) of the gas turbine engine (102). A conduit housing (134) defines an interior for enclosing the plurality of power feeder cables (136). A first connector (140) connects a first point on the conduit housing (134) to the engine core of the gas turbine engine (102). A second connector (142) connects a second point on the conduit housing (134) to a trailing edge flange of the fan casing (138) of the gas turbine engine (102).

The invention discloses a high-voltage isolating switch operating mechanism which comprises a bottom plate for installing parts, an operating motor and a gear are arranged on the bottom plate, the operating motor drives the gear to rotate, a closing pawl and an opening pawl are arranged on one side face of the gear, and the closing pawl and the opening pawl are arranged on the other side face of the gear. The outer side of the gear is provided with a switching-on position tip and a switching-off position tip which are respectively corresponding to the switching-on pawl and the switching-off pawl. The gear is sleeved on the main shaft, a driving wheel is coaxially fixed on the main shaft, and a driving wheel closing convex edge and a driving wheel opening convex edge which respectively correspond to the closing pawl and the opening pawl are arranged on the driving wheel and are positioned between the closing pawl and the opening pawl. A two-way clutch and a motor controller are omitted, and the purposes of being simple in structure, low in cost, stable in performance and easy to operate are achieved.

The invention provides an IGBT junction temperature estimation method and system for a motor controller. The method comprises the steps that S1, working condition data and power module parameters of a whole vehicle are acquired; s2, calculating the average loss power of each switch tube based on real-time working conditions and module parameters, determining equivalent coupling thermal impedance matrix parameters of different switch tubes to a temperature sensor and thermal resistance parameters from a chip to cooling liquid according to a cooling liquid flow signal, and obtaining a power compensation coefficient in combination with the rotating speed of a motor, the temperature rise of the temperature sensor is calculated according to the linear superposition principle through the loss power, the compensation coefficient and the equivalent coupling thermal impedance matrix of the different switch tubes, and then the estimated water temperature is obtained, and S3, the chip junction temperature is obtained according to the loss power, the power compensation coefficient, the thermal resistance from the chip to the cooling liquid and the estimated water temperature of the different switch tubes in the same phase. According to the method, the resource occupation of the processor is effectively reduced, and the water temperature and junction temperature estimation precision under all working conditions such as locked-rotor and low-rotating-speed conditions is remarkably improved.

The present application relates to the technical field of agricultural machinery. Disclosed are a hybrid combine harvester, and a control method and a controller therefor. The harvester comprises: a hybrid system comprising a power battery and a range extender composed of an engine and a generator; an operation system comprising a plurality of operation components and a plurality of operation electric motors enabling each operation component to be driven by an electric motor; a traveling system comprising traveling wheels and traveling electric motors for driving the corresponding traveling wheels; and a control system comprising a vehicle controller and a plurality of electric motor controllers respectively corresponding to the operation electric motors, the traveling electric motors and the generator. The hybrid system supplies, in response to a power control strategy of the control system, power to corresponding electric motors in the operation system and the traveling system, so as to drive the harvester to travel and operate. The present application realizes a full electric-drive hybrid solution of the harvester, and avoids the problem of efficiency caused by multi-stage mechanical transmission of a traditional harvester.

The invention discloses an electric aircraft high-voltage power distribution control method and system, a medium and a product thereof, and relates to the technical field of high-voltage power distribution, and the method comprises the steps: receiving a DC power supply outputted by a power battery pack, and achieving the power-on soft start through a pre-charging loop; distributing electric energy to a motor controller, an auxiliary power supply module, an air conditioning system and an electric heating system through a power distribution level according to the load priority; the power distribution stage integrates multiple solid-state relays or contactors to form load branches. An independent protection unit is configured for each load branch at a load output stage, and the independent protection units monitor voltage, current and temperature parameters in real time and execute fault isolation operation when the monitored parameters exceed corresponding preset thresholds. According to the invention, high-voltage power distribution control with load priority scheduling and branch-level rapid fault isolation is realized under the condition of high power density.

The invention provides a temperature cycle endurance test method, device and equipment and a storage medium, relates to the technical field of vehicles, and is used for accurately calculating the temperature cycle number of a motor controller. The method comprises the following steps: acquiring cooling liquid temperature-time data of motor controllers of a plurality of vehicles; based on the cooling liquid temperature-time data of the motor controller of each vehicle, determining temperature difference-cycle number data of the motor controller of each vehicle; based on the temperature difference-cycle number data of the motor controller of each vehicle, the equivalent temperature cycle number corresponding to each vehicle in the temperature cycle endurance test is determined; determining a target temperature cycle index in the temperature cycle endurance test based on the equivalent temperature cycle index corresponding to each of the plurality of vehicles; and performing a temperature cycle endurance test on the test vehicle based on the target temperature cycle number.

The invention discloses an assembling structure and method for a pure electric steering gear with double speed reducing mechanisms, and relates to the technical field of pure electric steering gear. According to the structure, a speed reducing shell and a motor controller are arranged on a steering gear shell, and a first-stage speed reducing mechanism composed of a small gear and a large gear is sequentially arranged in the speed reducing shell; one end of the worm is connected with the large gear through a transmission balance shaft, and a spring and a bearing are arranged in the transmission balance shaft to achieve radial elastic supporting and mechanical balance. The assembling method is carried out according to the sequence of the self-adaptive adjusting assembly, the worm, the transmission balance shaft, the speed reduction shell, the steering gear shell and the motor controller, and through a rotation test, the meshing clearance of the gear pair and the worm and gear pair is subjected to self-adaptive compensation by utilizing elastic deformation of a spring and a rubber element. Under the condition of a single motor, a large total transmission ratio and a large steering output torque are obtained, and meanwhile transmission stability, noise vibration performance and long-term use reliability are considered.

The invention discloses a motor fault diagnosis method and a motor controller. The method comprises the following steps: acquiring a near-field electromagnetic noise audio signal and a vibration acceleration signal of a motor shell when a motor runs; performing short-time Fourier transform on the near-field electromagnetic noise audio signal, and extracting an original electromagnetic voiceprint feature vector representing an internal electromagnetic state of the motor; the vibration acceleration signal is used as a modulation source, amplitude modulation processing is carried out on the original electromagnetic voiceprint feature vector, and a modulated electromagnetic voiceprint feature vector is generated; performing time domain coherence calculation on the original electromagnetic voiceprint feature vector and the modulated electromagnetic voiceprint feature vector to generate a two-dimensional electromagnetic-mechanical voiceprint interference map; and inputting the electromagnetic-mechanical voiceprint interference atlas into a convolutional neural network CNN, and outputting a final motor fault diagnosis result. According to the embodiment of the invention, the method can improve the discrimination of fault features, and achieves the high-precision diagnosis of motor faults under a complex working condition.

The utility model provides a power system, a new energy series-parallel power system and an automatic driving vehicle. The power system comprises an engine; the generator is in transmission connection with an output shaft of the engine; the input end of the gearbox is in transmission connection with an output shaft of the engine, and the output end of the gearbox is used for being in transmission connection with a main speed reducer; an output shaft of the first driving motor is in coupling transmission connection with an output shaft of the generator through a main clutch, and the output shaft of the first driving motor is selectively in transmission connection with a gear shifting gear set in the gearbox; the motor controller is electrically connected with the generator and the first driving motor respectively; and the shock absorber is arranged between the generator and the engine and is connected to an output shaft of the engine.

An example vehicle includes: at least one electric motor that propels the vehicle; at least one drive motor controller that controls the at least one electric motor to propel the vehicle; and a plurality of inertial measurement unit (IMU) modules coupled to various locations on the vehicle including the at least one drive motor controller or the at least one electric motor, wherein the plurality of IMU modules provide sensor information indicative of one or more of heading, acceleration, or orientation of the vehicle, wherein the at least one drive motor controller receives the sensor information from the plurality of IMU modules, and responsively adjusts operation of the at least one electric motor based on the sensor information.

The invention discloses a cooling module performance testing device and method for an unmanned aerial vehicle motor controller, and the method comprises the steps: determining the position of a to-be-tested cooling module through a sample positioning unit for testing, and collecting the temperature and air cooling environment conditions of the to-be-tested cooling module through a multi-mode sensing test adjustment unit. And the multi-mode sensing test adjusting unit performs multi-physical-quantity coupling control by adopting a PID control algorithm, and performs performance test on the to-be-tested heat dissipation module. The system has the advantages of accurate simulation, multi-mode sensing and self-feedback adjustment, can simulate the working condition of the heat dissipation module for the motor controller of the unmanned aerial vehicle at high altitude, measures the performance of the heat dissipation module for the motor controller of the unmanned aerial vehicle in real time, and automatically adjusts simulation parameters according to the feedback of multiple sensors.

A method comprises: generating a torque command for a motor of a vehicle, the torque command generated by a motor controller based at least in part on driver input; generating, by a feedback control scheme of the motor controller, a correction for the torque command; determining, by the motor controller, whether a lash crossing event is expected to occur within a time period; in response to a determination that the lash crossing event is expected to occur within the time period, modifying the torque command with the correction to generate a resulting torque command; and controlling the motor using the resulting torque command.

The invention provides a power module, a motor controller and a vehicle, and relates to the technical field of vehicles, the power module comprises a circuit board layer, a chip substrate and a heat dissipation bottom plate, the circuit board layer comprises conducting layers and insulating layers which are alternately arranged in the vertical direction, and the conducting layers and the insulating layers are arranged on the uppermost layer and the lowermost layer of the circuit board layer respectively; the lowest insulating layer in the circuit board layer is marked as a first insulating layer, the conductive layer stacked on the first insulating layer in the circuit board layer is marked as a first conductive layer, the chip substrate is embedded in the first insulating layer, the heat dissipation bottom plate is arranged at the lower end of the first insulating layer, the chip substrate comprises a power chip and a mounting substrate, and the power chip is embedded in the mounting substrate. The power chip is arranged at the upper end of the mounting substrate and is electrically connected with the first conductive layer. Thus, the occupied space of the power module can be reduced, an electrical connection path between the power chip and the driving circuit and a heat dissipation path between the power chip and the heat dissipation bottom plate can be shortened, stray inductance is reduced, and the heat dissipation effect is improved.

The invention discloses an assembly with a motor controller and a cold plate. The assembly comprises the cold plate, a circuit substrate, a terminal seat, a conductive part and a wiring terminal. The cold plate includes a first surface and a second surface opposite to each other and a through hole. The through hole penetrates through the first surface and the second surface. The circuit substrate includes a third surface and a fourth surface opposite to each other, and an opening. The fourth surface of the circuit substrate is attached to the first surface of the cold plate, the opening penetrates through the third surface and the fourth surface, and the opening and the through hole are spatially aligned and communicated with each other. The terminal seat is spatially opposite to the opening of the circuit substrate and the through hole of the cold plate. And the conductive part passes through the through hole, is arranged at an interval with the cold plate, and is clamped with the terminal seat. A terminal is connected to the conductive member and extends along the second surface of the cold plate.

The utility model provides a controller assembly and a vehicle, the controller assembly comprises a shell assembly, a power distribution assembly, a motor control assembly and an integrated power supply assembly, a first filter element, a second filter element and a third filter element are respectively arranged in the power distribution assembly, the motor control assembly and the integrated power supply assembly, and the power distribution assembly further comprises a bus element. The motor control assembly further comprises a motor controller, the integrated power supply assembly further comprises a first power distribution element, a battery, a bus element, a first filter element, a second filter element and a third filter element, the first power distribution element is electrically connected with an external power supply, and the motor controller is electrically connected with the motor and the second filter element. Therefore, the first filter element, the second filter element and the third filter element are respectively arranged in the power distribution assembly, the motor control assembly and the integrated power supply assembly, so that the first filter element, the second filter element and the third filter element can reduce the damage of electromagnetic waves to the battery in the charging and discharging process of the battery.

The invention relates to a vehicle engine shutdown control method and device, a controller, a storage medium and a vehicle. The method comprises the steps that after a parking instruction is received, state information of an engine is obtained; determining a predicted position of an engine piston according to the state information of the engine; determining a target braking torque of the motor according to the predicted position and the target position; and the target braking torque is sent to a controller of the motor, and the target braking torque is used for controlling an engine to stop, so that an engine piston is positioned to the target position. The original random shutdown process is converted into a predictable and repeatable control result, so that the response speed and smoothness of restarting of the engine are optimized, and vibration and noise in the shutdown stage are effectively reduced; meanwhile, the adaptive capacity to different working conditions is also improved by a state-based decision-making mechanism, the overall robustness and reliability of the vehicle-mounted system are enhanced, and the requirements of shutdown control on software and hardware resources in the vehicle are reduced.

The utility model relates to the field of gas detection alarm, and discloses a flame-retardant explosion-proof combustible gas detection alarm, which comprises a supporting slide rail and a gas detection sensor, an adjusting screw rod is movably connected inside the supporting slide rail, a screw rod sliding sleeve is arranged outside the adjusting screw rod, the right side of the screw rod sliding sleeve is fixedly connected with a mounting seat, and the gas detection sensor is fixedly connected with the mounting seat. An explosion-proof box is mounted on the right side of the mounting seat, and the gas detection sensor is mounted in the explosion-proof box. According to the flame-retardant explosion-proof combustible gas detection alarm, when the gas detection sensor detects that the gas concentration exceeds the standard, the remote alarm and the alarm lamp can give an alarm in time, and once the gas detection sensor detects that the concentration exceeds the standard, the detection controller can control the driving motor through the motor controller, so that the combustible gas can be detected. The driving motor drives the adjusting lead screw to rotate so that the gas detection sensor can be moved upwards to be away from gas, the detection position is adjusted by detecting the gas density to avoid burning and explosion, and the problem that burning and explosion are prone to occurring due to airflow impact is solved.