2466 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 provides an electric engine, a control method, a related device, a motor controller and an aircraft, and relates to the technical field of aircrafts. The electric engine comprises a power motor, a heat dissipation system and a control module, a cavity is formed in the power motor, the control module is integrated in the cavity, the space occupied by the electric engine is reduced, and therefore the size of the aircraft is reduced; the control module comprises a plurality of integrated driving modules, part of the driving modules are electrically connected with the power motor so as to control the power motor, and part of the driving modules are electrically connected with a heat dissipation motor in the heat dissipation system so as to control the heat dissipation motor. The performance and efficiency of the electric engine are improved through unified integrated control over the power motor and the heat dissipation motor. And through a unified control architecture, the system design is simplified, the development and maintenance cost is reduced, and the maintainability of the electric engine is improved.

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.

Provided are computer-implemented methods for autonomously controlling an aircraft with vertical take-off and landing capabilities and folding wings that includes controlling a plurality of thrust producing components of an aircraft to cause the aircraft to rise vertically when wings of the aircraft are in a first folded configuration, where when the wings of the aircraft are in the first folded configuration, a leading edge of each wing is oriented in a vertical direction setting motor controller gains based on the wings of the aircraft being in the first folded configuration, and causing the aircraft to align with a direction of airflow when the wings of the aircraft are in the first folded configuration, and controlling thrust producing components and control surfaces and internal articulation mechanisms of the aircraft to cause the aircraft to transition from folded wing configuration to unfolded wing configuration. Systems and computer program products are also provided.

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 discloses a lithium battery endurance prolonging method and system based on motor power curve optimization, and the method comprises the following steps: a motor controller collects a voltage signal of a lithium battery and a current signal of a motor in real time; the real residual capacity SOC of the lithium battery is calculated based on a dynamic internal resistance model, the endurance mileage is remarkably prolonged, the endurance mileage of the vehicle can be increased by 15-22 km and averagely prolonged by about 15% in different test scenes through triple optimization measures, and the problem that the endurance of a BMS-free low-voltage new energy vehicle is short is effectively solved. And the cost advantage is obvious: the existing current detection and ADC resources of the controller are completely reused, hardware does not need to be newly added, the method can be realized only through software upgrading, the problems that the cost is increased by 40% and wiring is complex due to the addition of a BMS system are avoided, and the production cost of the low-voltage new energy vehicle is reduced.

An example assembly of an electric power-take off (ePTO) system includes: a housing forming an enclosure therein; an electric motor mounted to the housing inside the enclosure; a motor controller mounted to the housing inside the enclosure; and a hydraulic pump mounted externally to the housing and coupled to the electric.

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.

The invention provides an output peak current capability identification method, system and device and a medium, and relates to the technical field of motor controllers, and the method comprises the steps: obtaining a power loss function of a power unit in a power module; constructing an initial junction temperature observer according to thermal resistance network nodes of the power module; acquiring peak current of the power module under different preset boundary conditions through a power module test, wherein each preset boundary condition comprises a preset value of each peak current output capability influence factor of the power module; performing test correction on the initial junction temperature observer based on the power loss function and the peak current of the power module under different preset boundary conditions to obtain a target junction temperature observer; the peak current of the power module under the real boundary condition is obtained based on the power loss function and the target junction temperature observer, the current output capacity of the motor controller can be maximized on the premise that the junction temperature of the power unit does not exceed the safety threshold value, and the performance potential of the motor controller is brought into full play.

The invention relates to the technical field of motor driving, and discloses a motor driving direction fault detection and compensation method and device. The method comprises the following steps: collecting state data of a target vehicle and constructing a sensor fusion vector; calculating a compensation torque value based on the state data and the sensor fusion vector; based on the compensation torque value, a boost module and a super capacitor combination in a two-stage voltage stabilizing circuit are driven to carry out voltage pre-adjustment, and a stable bus voltage is obtained; and generating a motor control signal based on the compensation torque value and the stable bus voltage, and sending the motor control signal to a motor controller to execute torque compensation and voltage stable adjustment operation. Self-adaptive compensation torque calculation under different working conditions is achieved, predictive adjustment on instantaneous power requirements is achieved through coordinated work of the boost module and the super capacitor combination, voltage fluctuation in the torque compensation process is effectively restrained, and then effective execution of torque compensation and voltage stability adjustment is ensured.

The invention provides an active short circuit control method and device, a vehicle, a medium and a program product, and relates to the technical field of motor control. The method comprises the following steps: under the condition that the motor controller system needs to execute an active short circuit strategy, obtaining thermal damage evaluation values respectively corresponding to a plurality of execution paths contained in a level inverter in the motor controller system; dynamically determining an execution path meeting a thermal damage risk condition as a target execution path of the active short circuit strategy in the plurality of execution paths according to each thermal damage evaluation value; and controlling the level inverter to execute the active short circuit strategy on the target execution path. According to the method, the thermal damage evaluation values corresponding to the multiple execution paths are acquired in real time, and the target execution path of the active short circuit strategy is dynamically determined based on the thermal damage evaluation values corresponding to the multiple execution paths, so that the thermal damage of the power device caused by executing the active short circuit strategy for a long time by a single execution path is reduced; therefore, the thermal damage risk of each power device is obviously 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 utility model discloses a leg device of a foot type robot and the foot type robot. The leg device of the foot type robot comprises a robot leg and further comprises a driving motor arranged in the robot leg, the driving motor comprises a shell, a power cavity formed in the shell and a power assembly arranged in the power cavity, and a first containing cavity is formed in the end face of the tail of the shell; a motor controller electrically connected with the power assembly is arranged in the first containing cavity, and cooling fins are arranged on the motor controller and connected with the shell in a heat conduction mode. The utility model further discloses the foot type robot which adopts the leg device of the foot type robot. The motor controller has the advantage of solving the problem that the motor controller for installing the motor in the leg of the humanoid robot is easy to overheat. The cooling fins are connected with the shell in a heat conduction mode, heat generated by the motor controller can be rapidly transmitted to the shell and then dissipated to the surrounding environment through the shell, faults caused by overheating of the motor controller are avoided, and stable operation of the motor controller is guaranteed.

The utility model provides a cooling system of an electric engine and application of the cooling system, the electric engine comprises a power motor and a motor controller, and the motor controller is integrated in the power motor; the cooling system comprises a flow channel, a first branch, a second branch and a flow channel control valve, the flow channel control valve is integrated in the motor controller, cooling liquid in the flow channel is divided into the first branch and the second branch through the flow channel control valve, and the flow channel control valve is used for controlling the flow of the cooling liquid in the first branch and the second branch. The cooling liquid flowing through the first branch is used for cooling the motor controller, and the cooling liquid flowing through the second branch is used for cooling the power motor. The motor controller and the power motor are independently cooled through cooling liquid flowing through the two branches connected in parallel, the flow of the cooling liquid of each branch is controlled through the flow channel control valves, it is ensured that the power motor and the motor controller are fully cooled, the cooling efficiency is improved, then the system operation efficiency is improved, and the heat dissipation requirement of a motor engine in an aircraft is met.

The invention discloses an encoder delay compensation method and system and a related device, which are used for effectively compensating angle lag caused by encoder signal processing delay in different rotating speed ranges and improving the control performance of a motor. The method comprises the following steps: under the steady-state condition of constant-speed no-load operation of a motor, acquiring current and electrical angular velocity in a motor controller and first voltage output by a control loop; calculating a second voltage based on a motor model according to the current, the electrical angular velocity and the motor operation parameters; calculating an initial angle deviation of the encoder according to the first voltage and the second voltage; performing iterative adjustment on the initial angle deviation until the difference value between the first voltage and the second voltage meets a preset error threshold value; establishing a fitting model according to the at least two groups of electrical angular velocities and the corresponding angular deviation data to obtain a compensation coefficient; and when the motor runs, performing delay compensation on the output angle of the encoder according to the compensation coefficient and the real-time electrical angular velocity.

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, which belongs to the technical field of the motor, discloses a two-in-one integrated electric drive assembly comprising a housing assembly, a motor controller and a motor stator assembly. The shell assembly comprises a motor shell, a motor front end cover and a motor rear end cover, wherein the motor front end cover and the motor rear end cover are connected to the two axial ends of the motor shell respectively. The motor controller comprises a motor controller shell arranged on the motor front end cover and the motor rear end cover, and a control unit and a controller three-phase copper bar which are respectively arranged in the motor controller shell; the motor stator assembly comprises a stator iron core installed in the motor shell, a stator winding arranged on the stator iron core and a motor three-phase line wiring terminal electrically connected with the stator winding. The motor shell and the motor controller shell are independently arranged, and the motor controller shell is installed on the motor shell. According to the invention, the motor controller and the motor shell are arranged independently, so that the disassembly and maintenance are convenient, and the assembly and maintenance difficulty is reduced.

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).

An electric motor controller and a cable output structure thereof, and an electric motor driving system. The cable output structure of the electric motor controller comprises: a housing (10), which comprises at least one mounting tube (110) penetrating the housing in a direction of thickness; a terminal (200), which runs through the mounting tube; a sealing assembly (300), which is configured to seal a gap between the housing and a shell (51) of the electric motor controller, as well as a gap between the terminal and the mounting tube; and a choke ring (400), which is arranged in the housing and surrounds the periphery of the mounting tube. The cable output structure meets the sealing requirements of the electric motor controller and realizes a filtering function for high-frequency harmonic waves generated by a high-voltage circuit, the overall volume is reduced, and thus the internal structure of the electric motor controller is more compact, thereby realizing miniaturization requirements of the electric motor controller.

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 invention provides a charging circuit, a control method and system thereof and a vehicle, and relates to the technical field of vehicle charging. The method comprises the steps that after a vehicle control unit receives a charging request sent by a battery management system, whether a first motor controller breaks down or not is judged, and when the first motor controller breaks down, a high-voltage power-on instruction is sent to the battery management system; the battery management system responds to the high-voltage power-on instruction and controls a main positive relay, a main negative relay, a quick charge positive relay and a pre-charge relay in a high-voltage loop to act according to a preset sequence so as to complete high-voltage loop pre-charge and high-voltage loop power-on; after determining that the high-voltage loop is electrified, the vehicle control unit sends a charging instruction to the battery management system; and the battery management system responds to the charging instruction and controls the charging pile to quickly charge the power battery. According to the method, the fast charging process is optimized, it is ensured that the vehicle can still be fast charged when the first motor controller breaks down, and the fault tolerance and reliability of the charging system are 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.