102results about "Single motor speed/torque control" patented technology

The invention relates to the technical field of motor control, in particular to a brushless motor electronic speed regulation circuit for an unmanned aerial vehicle and a control method of the brushless motor electronic speed regulation circuit. The brushless motor electronic speed regulation circuit comprises a printed circuit board, a power supply module and a grid driving module. The printed circuit board is provided with a plurality of wiring layers which are stacked, and comprises a first power supply layer and a second power supply layer which are adjacent to each other in the vertical direction and are overlapped and aligned, and an electrical control layer. The power supply module is arranged on the first power supply layer and the second power supply layer, the first power supply layer and the second power supply layer are electrically connected through a matrix via hole array, and the power supply module is used for being electrically connected with an external power supply and supplying power to a circuit after processing. The grid driving module is arranged on the electrical control layer, is powered by the power supply module and is used for outputting driving voltage to the brushless motor, large current transmission and balanced distribution of the multi-channel motor controller can be realized on a single printed circuit board, and electromagnetic interference of a power loop on a control signal is inhibited.

The invention relates to a method for operating an electric motor (1), in particular a piston pump (9), wherein the electric motor (1) has a rotor shaft (3) and is driven with a target rotational speed (n soll ) and a target direction of rotation for the rotor shaft (3) depending on a power requirement, wherein an actual rotational speed (n Ist ) of the rotor shaft (3) is monitored. The method according to the invention is characterized in that the target direction of rotation is changed for a predetermined period of time (t) when the actual rotational speed (n Ist ) is equal to zero and the target rotational speed (n soll ) is not equal to zero, and the electric motor (1) is then driven again with the target rotational speed (n soll ) and the target direction of rotation.

This utility model discloses an adjustable speed pusher with fault detection function, including a speed regulator. One end of the speed regulator is provided with a sealing gasket, and the other side of the sealing gasket is provided with a junction box. A composite connector electrically connected to the speed regulator is installed at one end of the junction box. The other end of the speed regulator is electrically connected to a permanent magnet synchronous motor. This adjustable speed pusher with fault detection function utilizes a PWM variable frequency speed control box driven by a permanent magnet synchronous motor. It can adjust the pusher speed in real time according to external commands, offering high flexibility and good controllability to meet the different pusher speed requirements of various processes. It also provides better energy-saving effects. Furthermore, this utility model can monitor its own circuit and vibration frequency information in real time and feed it back to the operator's control terminal for timely fault detection and troubleshooting, ensuring smooth production.

The application relates to the technical field of motor driving, and discloses a motor driving method and a motor control method, which are realized through a driving circuit; the driving circuit comprises driving branches W, V and U which are connected in parallel; the driving branch W comprises upper and lower MOS tubes W+ and W- connected in series; the driving branch V comprises upper and lower MOS tubes V+ and V- connected in series; and the driving branch U comprises upper and lower MOS tubes U+ and U- connected in series; after current conduction control switching from the upper MOS tube V+ and the lower MOS tube U- to the upper MOS tube V+ and the lower switch tube W-, the upper MOS tube V+ is controlled to be always on, and the lower MOS tube W- is controlled to be intermittently on; when the driving state is switched, the lower MOS tube is controlled to be intermittently on, and the upper MOS tube is controlled to be always on, so that the energy stored in the winding of the motor can be circulated through the loop on the driving circuit instead of being poured back to the power supply, thereby effectively inhibiting the current pouring back of the power supply.

Provided are a mower and an all-terrain vehicle. The mower includes: a vehicle frame and multiple functional devices. The multiple functional devices include at least: a traveling assembly including traveling wheels for driving the mower to travel on the ground and a traveling motor for driving the traveling wheels; an operation assembly configured to be operated by a user to control the mower; and a power supply assembly configured to supply energy to the traveling assembly. The mower further includes a communication system, where the communication system includes control modules connected to the multiple functional devices, and the multiple control modules are capable of communicating with each other through a first channel. The communication system further includes a second channel, and the second channel is configured to transmit communication information between at least two control modules. With the preceding technical solutions, the mower with the communication link self-recovery function and the fault self-diagnosis function can be provided, and when communication between some functional devices of the mower is abnormal, a communication link between the other functional devices can still be established through the second channel.

A motor control device includes a plurality of control units corresponding to a plurality of windings (14, 15) provided in a motor (12). The plurality of control units includes a master control unit (20), a slave control unit (30), and at least one abnormality monitoring unit (53, 62, 64). The slave control unit (30) is configured to, after the abnormality monitoring unit (53, 62, 64) detects a communication abnormality between the control units, before determining the communication abnormality, generate a power supply control command value using information acquired through a path other than communication between the control units and maintained in a normal state in which the communication abnormality between the control units is not detected for controlling power supply to the windings (14, 15), and perform backup control for maintaining the power supply control command value.

This motor control device comprises: a manual steering command value calculation unit that uses a torsion bar torque to calculate a manual steering command value; an integrated angle command value calculation unit that calculates an integrated angle command value by adding the manual steering command value to an automatic steering command value for driving assistance; and a control unit that drives and controls an electric motor on the basis of the integrated angle command value. In a driving assistance mode, the manual steering command value calculation unit is configured to calculate the manual steering command value by using a motion equation in a reference model of a steering device, and the manual steering command value calculation unit calculates the manual steering command value by using, as a virtual damper counterforce in the motion equation, a virtual damper counterforce that is obtained by adding a virtual damper counterforce corresponding to a differential value of the automatic steering command value to a virtual damper counterforce corresponding to a differential value of the manual steering command value.

The invention relates to a method for operating an electric motor (130) at a predetermined speed using a controller (150) and a DC voltage source. The controller (150) is designed to regulate the electrical power consumption of the electric motor (130) during operation at the predetermined speed. The DC voltage source provides a DC voltage to supply the electric motor (130) with electrical energy. The method comprises the following steps: 1. The controller (150) detects the voltage value of the DC voltage, and 2. the controller (150) regulates the electrical power consumption based on the voltage value. With this invention, for example, a battery pack can be reliably operated as a DC voltage source even when cold and, if necessary, quickly warmed up.

This invention discloses a method and control system for suppressing torque ripple in a direct-drive motor of a washing machine. The method includes: using the motor's input speed and real-time speed as the output value of a speed PI controller to obtain a first reference current; using the current motor Hall value, the first reference current, and the real-time current as the output value of a current PI controller to output a compensating electromotive force; obtaining a reference voltage based on the first reference current and the compensating electromotive force; comparing the reference voltage with the motor's rated voltage to obtain the duty cycle; outputting a pulse width modulation (PWM) signal based on the duty cycle; and processing the PWM signal to output a feedback signal to control the motor's output voltage. By employing a dual-closed-loop PI control method, the real-time speed and real-time current of the motor are used for feedback PI control to adjust the motor's input voltage, thereby reducing torque ripple caused by three-phase current fluctuations after load changes, improving the washing machine motor control system's anti-interference capability against load changes, and stabilizing the motor's output torque.

The application provides an operating state monitoring method and device of an electronic lock, equipment and a storage medium. The monitoring method comprises the following steps: controlling a permanent magnet synchronous motor to adjust the operating state of the electronic lock according to a user instruction; the user instruction is an unlocking instruction or a locking instruction; detecting the rotation angle of a rotor in the permanent magnet synchronous motor; and if the rotation angle does not reach a preset angle, it is determined that the electronic lock has a fault. The application can determine whether the electronic lock has a fault by monitoring the rotation angle of the motor rotor, effectively avoids the problem of motor damage caused by judging whether the motor is executed in place through stalling, and improves the user experience.

The application belongs to the technical field of servo mechanisms, and specifically discloses a Hall detection type double-redundancy multi-turn motion servo mechanism. The Hall detection type double-redundancy multi-turn motion servo mechanism comprises a drive control box and an executing mechanism; the executing mechanism comprises a motor and a speed reduction mechanism; the drive control box and the motor are designed in a double-redundancy mode to form two independent working channels; during working, the double redundancies work simultaneously, and the redundancy where a fault occurs exits the working after the fault occurs. The scheme solves the technical problem of cooperative control between position measurement and redundancy of the double-redundancy multi-turn motion servo mechanism.

The invention relates to a system (1) for managing a flight compensator of an aircraft (100), the system (1) comprising at least one three-phase electric motor (2) intended to move the flight compensator in use, and the system (1) comprising at least one circuit (3) for supplying electric power to the motor (2), the circuit (3) including a plurality of blocks, including at least: a first block (4) arranged to dissipate electric energy that can be generated by the motor, a second block (10) arranged to impose a given electric voltage on the terminals of the motor, a third block (18) including the motor, and a fourth block (19) for stabilising the electric voltage; the system being characterised in that the fourth block (19) is arranged between the first block (4) and the second block (10), the fourth block comprising at least one two-quadrant electric power converter (30) with reversible current.

The application discloses a wide-speed-adjustable permanent magnet synchronous motor with variable air-gap magnetic flux and a control method, and relates to the technical field of motors. The synchronous motor comprises a screw rod, a first screw rod fixing seat, a second screw rod fixing seat, a stator and a rotor assembly. The first screw rod fixing seat and the second screw rod fixing seat are fixed at two ends of the screw rod. The rotor assembly is coaxially arranged outside the screw rod and is coaxially arranged with the stator. The rotor assembly and the screw rod are rotatably and axially movably matched. The rotor assembly is of an axial sectional structure. At least two rotor sections with differentiated electromagnetic parameters are arranged along the axial direction of the screw rod. The magnetic circuit structure with different axial sectional air-gap magnetic fluxes is formed between each rotor section and the stator. Without relying on the traditional flux-weakening control, the air-gap magnetic flux is changed in a mechanical mode, the back electromotive force and the torque characteristics of the motor are adjusted, wide-range speed adjustment is realized, the efficiency reduction and the additional loss caused by the flux-weakening control are avoided, and the overall operation performance of the motor is improved.

This invention discloses a dynamic speed control system based on the speed feedback of a permanent magnet synchronous motor, relating to the field of motor speed control technology. It includes: a data acquisition module for acquiring three-phase stator current data, raw physical speed feedback data, and stator voltage command data of the motor, and inputting the stator voltage command data into a preset motor mathematical model to obtain model-estimated speed data; and a real-time deviation calculation module for calculating the real-time deviation divergence between the raw physical speed feedback data and the model-estimated speed data, obtaining residual fluctuation based on the three-phase stator current data, and mapping the real-time deviation divergence and residual fluctuation to obtain a dynamic feedback reliability factor. Its beneficial effects include reducing the fluctuation of the speed loop output torque current, extending the mechanical life of the motor, and improving the overall energy efficiency stability of the system.

This disclosure provides a drive method, apparatus, circuit and device for a brushless motor relating to the motor drive technology, the brushless motor comprising a stator core including Z groups of teeth spaced apart along the circumferential direction, a rotor including a magnetic ring with P poles, and X-phase conductors wound around the groups of teeth to form coils, where X≧2 and Z=P×X, wherein in the same phase conductor, the winding direction along the circumferential direction of the coils on two adjacent groups of teeth is opposite, and the X-phase conductors are arranged at intervals of X-1 groups of teeth, the drive method comprising providing N periodically changing drive signals to the N-phase conductors via independent first and second ends of each N-phase conductor, where 2≦N≦X, the waveform of each drive signal in its period includes a waveform with an intensity greater than 0 and a waveform with an intensity less than 0, and within the period in which the intensity of any one drive signal is not 0, the intensity of the other drive signals among the N drive signals is all 0. In this way, the drive control of the brushless motor can be simplified.

This invention provides a method and system for controlling the speed of a permanent magnet synchronous motor, belonging to the field of motor control technology. The method first constructs a discrete-time mathematical model of the motor and an external system including lumped reference signals and lumped disturbances, and establishes a composite system model accordingly. Then, a dimension-reduced observer is constructed to estimate the external signals, and state and input transformations are performed in conjunction with regulator equations. Next, a constraint set for the transformed system is constructed, and the state variables are decomposed into nominal components, deterministic error components, and uncertain error components. Furthermore, a time-varying constraint compression set is dynamically constructed based on the errors, and an online model predictive control optimization problem with dynamically tightened constraints is solved to obtain the nominal control quantity. Finally, the nominal control quantity and the estimated external signals are combined to synthesize the actual control voltage. This invention effectively suppresses disturbances, strictly ensures system safety constraints, guarantees the recursive feasibility and closed-loop stability of the control, and improves the dynamic response speed.

The invention discloses a non-inductive control method for a brushless direct current motor of a circuit breaker, and the method comprises the steps: obtaining a relation between a moment corresponding to a first rising edge in each period of a PWM signal of any one of three phases of the brushless direct current motor and a moment corresponding to a first rising edge in each period of a commutation signal of the phase; the commutation signal of the phase is constructed based on the relation and the commutation signal high level duration time, the brushless direct current motor is controlled according to the constructed three-phase commutation signals, and compared with the prior art, the method has the technical effects that the phase delay problem caused by a filter does not exist; the full-speed-domain performance is excellent, and the low-speed loading capacity is similar to that of a scheme formed by position sensors such as HALL; wiring is simple and reliable, and position detection precision is high.

This utility model relates to the technical field of interface circuits for brushless electronic fan controllers, and discloses an interface circuit compatible with PWM speed control and analog speed control. The circuit includes a surge protection unit, a first filter unit, a first voltage divider unit, a second voltage divider unit, an integrator circuit, and a second filter unit. The surge protection unit is electrically connected to the input terminal of the first filter unit for inputting a PWM speed control signal. In practical use, when an analog speed control signal is required, the PWM signal, after being protected by the surge protection unit, sequentially passes through the first voltage divider unit, the second voltage divider unit, the integrator circuit, and the second filter unit to become a stable analog speed control signal. This allows a single interface circuit to satisfy the input of both PWM and analog speed control signals, simplifying the interface circuit structure of the drive signal in the brushless electronic controller, reducing costs, and facilitating practical use.

A popcorn machine is provided herein. The popcorn machine comprises a kettle configured to cook popcorn kernels, a heater configured to heat the kettle, a first sensor configured to detect a first operational parameter during cooking of the popcorn kernels, a second sensor configured to detect a second operational parameter during cooking of the popcorn kernels, a drive assembly operatively coupled to the kettle and configured to automatically dump the kettle, and a controller communicatively coupled to the first sensor, the second sensor, and the drive assembly. The controller is configured to compare the first operational parameter to a first threshold value, compare the second operational parameter to a second threshold value, and activate the drive assembly to automatically dump die kettie when both the first operational parameter satisfies the first threshold value and tire second operational parameter satisfies die second threshold value.

This utility model discloses a bearing assembly structure for a rotor motor, including a housing, a motor spindle, and a rotor. The housing houses a stator assembly and a rotor assembly arranged opposite to each other. The motor spindle is located inside the housing, and its output end is coaxially connected to the rotor to drive its rotation. A support base is located at the head of the housing, and a cover is mounted on the support base. The shaft of a DC brushless motor is connected to the air-jet spinning rotor assembly, transmitting the rotational power generated by the motor to the rotor. The motor speed can be precisely controlled by changing the input voltage or current to meet the needs of different spinning processes, improving production efficiency and yarn quality. It features high efficiency, fast response, and high stability. The bearing design provides a larger support area, significantly reducing vibration and offset of the motor spindle during high-speed rotation, thereby improving the concentricity and operational stability of the rotor.

Drive (33) for a device for smoothing viscous concrete, which device comprises a disk (34) or several disks, which disk (34) or disks are rotated on the surface of the liquid concrete with a motion vector essentially parallel to the surface of the concrete, which drive (33) comprises an electric motor, a battery, a gearbox and a control unit, which electric motor drives the disc (34) or discs via a gearbox with a ratio of 1:20 and a drive shaft, which control unit allows a user to specify a predetermined speed of rotation for the electric motor and to control the actual speed of rotation of the electric motor, characterized by the fact that The control unit for limiting energy consumption from the battery when the specified rotational speed changes the actual rotational speed of the electric motor incrementally or continuously or according to a mathematical function over a period of time with a change of 1000-2000 rpm per second.

The motor control apparatus includes: setting means (31) adapted to set a limit value of coil current flowing through a coil of a motor; current supply means (121) adapted to supply the motor with the coil current in a range not exceeding the limit value set by the setting means; detection means (128) adapted to detect a current value of the coil current; and comparison means (31) adapted to compare an average value of the current value detected by the detection means over a predetermined time period with a first threshold value. When the average value has exceeded the first threshold value, the setting means updates the limit value in a decreasing manner.

A steer-by-wire system comprising a steering wheel for use by an operator and an electric motor assembly coupled to the steering wheel for providing active torque feedback. The electric motor has a rotor mounted for rotation, and a magnet mounted to the rotor for rotation about an axis, wherein the at least one magnet is a permanent magnet with a pole pair. A fixed stator has coils for creating an electric field to act upon the magnet. Electronics are positioned on the axis of the magnet for controlling commutation of the stator coils and generating a primary high resolution angular position signal indicative of movement of the steering wheel by the operator. High resolution on-axis sensors, in communication with the electronics, detect a commutation position between the rotor and the stator and producing first and second continuous angle measurements for the pole pair of the at least one magnet.

A variety of methods, controllers and electric machine systems are described that facilitate pulsed control of electric machines (e.g., electric motors and generators) to improve the machine's energy conversion efficiency. Under selected operating conditions, the electric machine is intermittently driven (pulsed). The pulsed operation causes the output of the electric machine to alternate between a first output level and a second output level that is lower than the first output level. The output levels are selected such that at least one of the electric machine and a system that includes the electric machine has a higher energy conversion efficiency during the pulsed operation than the electric machine would have when operated at a third output level that would be required to drive the electric machine in a continuous manner to deliver the desired output. In some embodiments, the second output level is zero torque.