66 results about "Dc motor control" patented technology

The invention discloses a self-adaptive virtual inertia control and power distribution method of an energy storage converter suitable for a multi-direct-current micro-grid. The method comprises the following steps: establishing a virtual direct-current motor control model; based on the virtual direct current motor control model, designing an adaptive virtual inertial parameter control and power distribution algorithm, so that the energy storage converter can simulate the inertia and damping characteristics of the direct current generator; constructing a small-signal model of the common DC bus of the multi-DC micro-grid, analyzing the influence of inertia and damping parameters on the dynamic performance and stability of the system, and drawing a Nyquist curve based on an impedance ratio criterion to optimize the inertia and damping parameters; and verifying the adaptability of the adaptive virtual inertial parameter control and power distribution algorithm in the multi-direct-current micro-grid, and realizing effective control on the bus voltage stability and the power distribution of the energy storage unit by adjusting the power response characteristic of the energy storage unit. According to the invention, the stability and response speed of the multi-direct-current micro-grid system are improved, the bus voltage fluctuation is effectively slowed down, and the service life of the energy storage unit is prolonged.

The utility model relates to an H-bridge driving circuit with a discharge branch and a chip, and belongs to the field of motor driving. The driving circuit comprises a driving chip module, a switch control module and a switch misconduction protection module. The switch control module is composed of a triode and MOS tube combined control circuit, it is ensured that grid charges can be rapidly discharged when the IGBT is turned off, and misconduction is prevented. The misconduction protection module enhances the charge discharge capability by providing a low-impedance path, ensures the accurate turn-off of the IGBT, and avoids the influence of surge voltage. The circuit realizes reliability and quick response performance in forward and reverse control and high-frequency switch application of the motor, and is suitable for direct-current motor control, stepping motor control, direct-current-alternating-current converters, direct-current-direct-current converters and other power electronic devices. Through the design, the stability and the safety of the motor control system are effectively improved.

The invention discloses a direct current motor iterative learning control optimization method for executing a changing task, and relates to the field of direct current motor control. According to the method, an iterative learning controller is added in parallel on the basis of a direct-current motor closed-loop feedback control system, and the direct-current motor control system is converted into an input and output matrix model of a time sequence based on a lifting technology. An optimal iterative learning control algorithm is designed under a norm optimization framework, and zero-error tracking of expected output is basically realized by the system through combination of inter-batch repeated learning and in-batch real-time feedback. Based on an optimal input sequence and an error sequence which are obtained by repeatedly executing a certain task, a feedback controller and a feedforward controller are integrated into a new feedback controller based on learning by utilizing a least square fitting method, and finally the new feedback controller is applied to a system for executing a change track task. According to the method, historical learning experience is transferred to a brand new task without limiting the time length, and trajectory tracking of the direct current motor change task can be realized without re-learning.

The invention provides a virtual direct current motor control method based on multi-objective optimization, and relates to the technical field of resonance suppression of a micro-grid, and the method comprises the steps: constructing a control equation of a virtual direct current motor; performing additional control on the energy storage unit by using the control equation of the virtual direct current motor to obtain an energy storage unit control result; based on the control result of the energy storage unit, optimizing the control equation parameters of the virtual direct current motor by using a multi-target particle swarm optimization algorithm to obtain an optimized inertia coefficient and an optimized damping coefficient; and optimizing a control equation of the virtual direct current motor by using the optimized inertia coefficient and the optimized damping coefficient to obtain a control result of the virtual direct current motor, and completing control of the virtual direct current motor. The method solves the problem that proper parameters of the virtual direct current motor are difficult to accurately select.

The invention relates to a multi-port electric energy router control method and device based on an MMC. The method comprises the following steps: for a five-port electric energy router based on a double-end back-to-back modular multilevel converter (MMC), connecting a middle-low voltage direct current bus by adopting an input-series output-parallel dual active bridge converter structure, and realizing module power balance of each port through input voltage balance control; in a network-following type control link of a double-end back-to-back modular multilevel converter (MMC), virtual synchronous generator control (VSG) is applied to a grid-connected power control port of the MMC, and virtual direct current motor control (VDMC) is applied to an energy storage port of the MMC; and determining an operation mode based on the power grid short-circuit ratio, and carrying out network following / network construction control switching on the MMC-based multi-port electric energy router under the strong / weak power grid condition. Through the control mode, the multi-port electric energy router can ensure the stability of direct current voltage and the balance of supply and demand of power under complex working conditions.

The utility model relates to the technical field of motor speed regulation, in particular to a direct current motor speed regulation circuit. The speed regulation circuit comprises an input connector CON1 used for accessing a DC input voltage; the output connector CON2 is used for connecting a direct current motor; the step-down chip ME3148 is used for converting the direct-current input voltage into adjustable output voltage, and the step-down chip comprises a VI N pin 8, an SW pin 2, an FB pin 4, a VC pin 7, a CS pin 5 and a GND pin 3. The direct-current motor speed regulation control circuit is simple in structure, can realize wide-range and high-precision speed regulation control only by adjusting a single potentiometer, has the characteristics of low cost and high reliability while ensuring the speed regulation performance, and is suitable for direct-current motor control scenes with higher requirements on speed regulation range and precision.

This invention discloses a control method, device, and system for suppressing current ripple in a coreless brushed DC motor, belonging to the field of DC motor control. The method includes: using an H-bridge Buck converter as the driving topology to provide smooth voltage; designing a state feedback controller based on its state-space model to adjust the dynamic current response; simultaneously designing nonlinear disturbance observers to compensate for matched disturbances in the inductor branch and unmatched disturbances and their derivatives in the capacitor branch; innovatively designing a multi-channel quasi-resonant proportional-integral resonant observer to observe and compensate for the unmatched periodic disturbances caused by motor component commutation, with higher precision; and finally synthesizing a composite control law to drive the motor. The device and system correspondingly implement the above method. Compared with higher-order disturbance observers, the multi-channel quasi-resonant proportional-integral resonant observer proposed in this invention significantly improves the compensation capability for unmatched periodic disturbances, effectively suppressing current ripple in the coreless motor and improving torque stability.

The utility model provides a simulated DC motor control system for detecting the driving circuit of an air conditioning control board, wherein a DC motor driving signal receiving circuit is connected to the output signal end of the DC motor driving circuit of the control board under test; a receiving signal level conversion circuit is connected to the DC motor driving signal receiving circuit for converting the control signal level and inputting it to a central processing unit for identification processing; a feedback signal output circuit is connected to the central processing unit through an output signal level conversion circuit for converting the feedback signal processed by the central processing unit and sending it to the feedback input end of the DC motor driving circuit of the control board under test. The utility model provides a working circuit of a simulated DC motor, communicates with the DC motor driving circuit of the control board under test, and determines whether the circuit function of the control board under test is normal through the central processing unit, thereby simplifying the detection process of the DC motor driving circuit of the control board under test and avoiding the actual operation of the DC motor load.

A method of operating an inverter for a brushless direct current (BLDC) motor includes: driving a high-side switch to conduct current between a DC high node and an output node connected to the BLDC motor and for a conductive period in each of a plurality of operating periods; driving a low-side switch to a conductive state after a dead-time after the conductive period and to conduct current between the output node and a DC low node; receiving a duty cycle command; determining an adjusted duty cycle representing the conductive period as a portion of an operating period; determining a duty cycle difference signal as a difference between an initial duty cycle based on the duty cycle command, and the adjusted duty cycle; and determining a feedback duty offset signal based on the duty cycle difference signal. The adjusted duty cycle is computed based on the feedback duty offset signal.

We provide a gaming machine featuring DC motor control. [Solution] The system comprises a detection means for detecting an index, a DC motor control means for controlling a DC motor, and a game progress control means capable of periodically transmitting rotation instructions to the DC motor control means to instruct a predetermined amount of rotation. The DC motor control means can control the rotation of the DC motor by continuously receiving rotation instructions periodically, and can control the stopping of the DC motor when the periodic reception of rotation instructions ends. The game progress control means is a means for setting a first initial position based on the detection result of the detection means when the rotating body is rotating at a first speed, and for setting a second initial position based on the detection result of the detection means when the rotating body is rotating at a second speed.

The present invention discloses a feedback boost inverter and control method for suppressing the torque pulsation of a brushless DC motor, and relates to the technical field of brushless DC motor control. The feedback boost inverter for suppressing the torque pulsation of a brushless DC motor includes providing a feedback boost inverter topology with adjustable size and capable of exceeding the power supply voltage. The feedback boost inverter topology includes an electrolytic capacitor, seven diodes, and seven insulated gate bipolar transistors. Compared with a traditional inverter, which only requires an additional insulated gate bipolar transistor, a diode, and an electrolytic capacitor, it has the advantages of simple structure and convenient control. In addition, the energy of the electrolytic capacitor used to raise the bus voltage in this topology comes entirely from the energy fed back by the motor, thereby improving the energy utilization rate of the motor. Based on this feedback boost inverter, a feedback boost inverter control method for suppressing the torque pulsation of a brushless DC motor is proposed, and this control method can achieve good torque pulsation suppression effect over a wide speed range.

The invention discloses a novel auxiliary control system of a gas water heater. The novel auxiliary control system comprises a direct current motor and an auxiliary control panel, the auxiliary control board comprises an AC-to-DC unit, a DC motor control unit and a protection switch signal output unit. The AC-to-DC unit is used for converting an input 220V AC power supply into DC and supplying the DC to the DC motor control unit; the direct current motor control unit is used for controlling rotation of the direct current motor and monitoring the running state of the direct current motor, and the MCU drives the direct current motor in a constant-current mode and conducts high-dynamic-response motor rotating speed closed-loop control. The auxiliary control system of the gas water heater is formed only by replacing an alternating-current motor with a direct-current fan, cancelling a wind pressure switch and assembling an auxiliary control panel under the condition that the whole structure and the main control system of the existing alternating-current gas water heater are not changed, so that the fault rate of the gas water heater is reduced, the performance is more stable, and energy is saved; and meanwhile, the wind pressure resistance of the fan is enhanced.

The utility model discloses a novel control system for an AC voltage-stabilized power supply. The novel control system comprises a master control MCU module, a DC motor control circuit, a signal measurement circuit, a power conversion circuit, a man-machine interaction module, a communication module, a storage module and a protection module. The master control MCU module is connected with the signal measuring circuit, the man-machine interaction module, the communication module and the storage module through an SPI bus. The direct current motor control circuit adopts a full-bridge topological structure, is connected with the main control MCU module through an optical coupling isolator, and receives a PWM signal to control the positive and negative rotation and rapid braking of a motor; the power conversion circuit adopts a two-stage voltage reduction structure, the voltage of the first stage is reduced to 8V from + 12V, and the output of the second stage is 5V and 3.3 V. According to the utility model, a full-bridge topological structure and a + 12V single power supply are adopted for power supply, flexible forward rotation, reverse rotation and rapid braking control are realized, and the dynamic response capability of the system is improved.

The utility model discloses a direct current motor control circuit, and belongs to the technical field of motor control. The direct current motor control circuit comprises a key circuit, a control module, a driving module and a power supply module, the key circuit is electrically connected with the control module, the control module is electrically connected with the driving module, and the driving module is electrically connected with the direct current motor; an overcurrent protection circuit is arranged between the power supply module and the control module; voltage conversion circuits are arranged between the power supply module and the key circuit and between the driving module and the direct current motor; the voltage conversion circuit comprises a voltage regulator, the first end of the voltage regulator is grounded, and the third end of the voltage regulator is electrically connected with a second resistor and a first capacitor which are connected in series; the second end of the voltage regulator is electrically connected with a second capacitor and a third capacitor which are connected in parallel. The direct current motor control circuit does not need a relay, and is simple in structure, high in reliability and good in safety. The problem that the service life of an existing direct-current motor control circuit is limited is solved.

The present invention discloses a maximum likelihood gradient iterative parameter estimation algorithm based on a generalized time-varying system identification model. Due to the influence of factors such as disturbances, the model parameters of a motor speed control system are difficult to accurately estimate. DC motor control systems are characterized by randomness and the influence of disturbances. Furthermore, measuring the internal parameters of the motor during operation is extremely difficult. Furthermore, in actual operation, due to factors such as measurement noise, the system is contaminated by colored noise, which significantly affects the algorithm's identification accuracy. To improve the accuracy of motor parameter estimation, the present invention, based on a gradient search algorithm, transforms the system parameter identification problem into a probability density function extremum problem based on the maximum likelihood principle, and utilizes the maximum likelihood principle to directly process system noise to improve the algorithm's identification accuracy. The present invention includes the steps of constructing an identification model of a generalized time-varying system affected by colored noise, constructing a maximum likelihood gradient iterative parameter estimation algorithm flow, and constructing a maximum likelihood gradient iterative parameter estimation algorithm. The present method is simple, reliable, and has high identification accuracy, and can be applied to parameter estimation in DC motor control systems.

The utility model provides an inertial energy storage range extending system, which comprises a brushless direct current motor, a brushless direct current motor and a controller, the brushless direct current motor controller is in control connection with the brushless direct current motor; a rotor of the three-phase brushless generator is connected with a hub of a driven wheel of the vehicle, and the rotating mechanical energy of the driven wheel is converted into electric energy; the battery module comprises a battery pack A and a battery pack B, and the battery pack A and the battery pack B are alternately and electrically connected with the brushless direct current motor controller and the three-phase brushless generator, supply power to the brushless direct current motor controller and store electric energy converted by the three-phase brushless generator; and the PC linked switch is electrically connected between the battery module and the brushless direct current motor controller and between the battery module and the three-phase brushless generator, and is used for realizing alternate electrical connection between the battery pack A and the brushless direct current motor controller and between the battery pack B and the three-phase brushless generator. According to the inertial energy storage range extending system, mechanical energy of the driven wheel of the vehicle is converted into electric energy to be recycled, and the endurance mileage of the vehicle is increased.

The utility model provides a body mechanism for an intelligent robot. The body mechanism comprises a body shell, and a turntable direct current motor mechanism, a loudspeaker sound cavity, a turntable and a base main body which are arranged in the body shell, wherein the body bearing pack is fixed on the turntable; the body shell is fixedly connected to the rotary disc through screws and rotates along with the rotary disc. The turntable direct-current motor mechanism comprises a body bearing set, a body gear set and a turntable motor frame; wherein the turntable direct current motor drives the body gear set to rotate, and the body gear set is connected with the body bearing set; the turntable direct-current motor controls the body mechanism to rotate and is fixed on the turntable motor frame; the turntable motor frame is fixed on the turntable; and the loudspeaker sound cavity is fixed on the turntable.

The utility model belongs to hot rolled steel pipe processing technical field, and disclose a kind of production and processing equipment of hot rolled steel pipe, including table board, the upper surface of table board is fixed with drive pipe symmetrically, and the upside of drive pipe is equipped with clamping arc rod, the side of table board is equipped with support, and the side of support is equipped with cutting disc, two-way screw rod is rotatably equipped in drive pipe, the side of drive pipe is fixed with servo motor, and the output of servo motor is through drive pipe and is fixedly connected with two-way screw rod, the outer surface of two-way screw rod is symmetrically screwed and is equipped with moving block, the both sides of moving block are fixedly equipped with sleeve block, and the upper surface of sleeve block is connected with vertical plate by bolt cooperation. Through the above scheme, through servo motor and two-way screw rod cooperation clamping arc rod, realize steel pipe fast accurate clamping, and promote cutting accuracy;Electric push rod combines DC motor control cutting disc, ensure cutting efficient flexible;Guide frame and positioning rod guarantee support movement stable, improve equipment processing quality and reliability in all directions.

This invention discloses an output reachable set control method for a DC motor switching singular multi-agent system, belonging to the field of DC motor control. The method includes constructing a DC motor-switching singular model; monitoring the motor current and speed in the execution system, constructing a pulse reset map to capture transient current jumps; after a jump occurs, providing voltage feedback compensation through the switching singular model; ensuring the system state is within a preset bounded set, further limiting the current and speed to within safe thresholds, protecting the normal operation of the motor. The problem solved is to provide feedback compensation for feedback loop delays and pulse effects generated by mode switching, while limiting the current and speed within a reachable set. This method is used for motor control and voltage compensation.

A small-angle steering control system for steering wheels of a drive-by-wire mine wide-body dumper comprises a hydraulic oil tank, a steering pump, an emergency steering pump, a priority valve, an electric control steering valve, a steering gear and a steering cylinder. The emergency steering pump is a 24V synchronous direct current motor controlled through CAN communication. The steering pump and the emergency steering pump are connected in parallel through a pipeline and then are sequentially connected with the high-pressure filter and the priority valve in series. The front end of the steering gear and the electric control steering valve connected in parallel through a pipeline is connected with the priority valve in series, and the rear end is connected with the steering cylinder in series to form a hydraulic loop. The control precision of small-angle steering is improved; adjusting times of the steering system are reduced, and energy consumption of the steering system is reduced; the difficulty of realizing small-angle steering control is reduced, and the hardware cost of an unmanned steering system is saved.

The invention provides a hidden attack method and system of a DC control system based on a PI control technology, and belongs to the field of signal processing. The problem that for a DC motor control system with parameter uncertainty, an existing hidden attack method cannot accurately evaluate safety hazards of the DC motor control system and is difficult to provide effective guidance for construction of network safety protection systems of the DC motor control system and related application fields is solved. According to the method, a system model is constructed, a hidden attack strategy with robustness is designed, an input end attack signal is designed according to an attack target, an output end attack signal is designed according to the hidden attack strategy, and robust hidden attack of the DC motor control system is achieved through the input end attack signal and the output end attack signal. According to the robust hidden attack method, the influence of system uncertainty on hidden attack performance is considered, and compared with an existing hidden attack method, the robust hidden attack method can be suitable for an engineering control system with uncertainty.

The invention discloses a control method for a brushless direct current motor of an industrial sewing machine. The control method comprises the following steps: step 1, designing the structure of the brushless direct current motor of the industrial sewing machine; 2, setting a brushless direct current motor rotating speed control method based on the whale algorithm optimization PID; 3, designing software and hardware of a brushless direct current motor control system; according to the industrial sewing machine numerical control system parameter design method, by designing the structure of the industrial sewing machine brushless direct current motor, rotating speed control, control system software and hardware and the numerical control system parameters, the control performance is greatly improved, and meanwhile the purposes of low carbon and energy saving are achieved. Meanwhile, the stability, rapidity and accuracy of the system are improved, and needle stopping is rapid and accurate.

The present invention discloses an automatic generation method for the control code of a brushless DC motor based on STM32-MAT. In the present invention, an engineering file is established in STM32CubeMX to complete the setting of the chip model and pins; the algorithm module of the control system is designed on Matlab&Simulink, a blank Model is established, the STM32-MAT toolbox is found from the Simulink Library Browser, and the STM32_Config module in MCU CONFIG is dragged into the model file; a model for automatically generating code is established by using the Matlab function module and the components of STM32-MAT, and clicking Build generates the corresponding code; the compilation is opened and burned into the hardware chip for verification. The present invention improves the development efficiency and realizes the code transplantation between different chips.

The present invention relates to a control method for an onshore power energy router considering DC bus voltage stabilization. The present invention includes: controlling each port of the onshore power energy router connected with photovoltaic, ship and hybrid energy storage; adopting virtual synchronous machine control for the grid-connected converter part of the onshore power energy router and virtual DC motor control for the DC port of the onshore power energy router; comprehensively considering the power density complementary characteristics of the hybrid energy storage and the port compact characteristics of the energy router, equivalent impedance is carried out for the virtual DC motor control, and two-level parallel collaborative control is carried out on it; by introducing a DC bus voltage regulation link, the active power control of the virtual synchronous machine control is improved; according to the remaining capacity index SOC of the energy storage unit, the control parameters of the improved virtual synchronous machine control are adjusted to achieve seamless switching of frequency support and DC bus voltage support under different working conditions of the onshore power energy router.

The present invention relates to an automotive electronic control unit, the automotive electronic control unit comprising: a first chip; a second chip; and a switch circuit, wherein the switch circuit is configured to connect the first chip to two DC motor control circuits and disconnect the second chip from the two DC motor control circuits when the first chip is operating normally, so that the first chip controls the parking brake motor corresponding to the two DC motor control circuits; and the switch circuit is also configured to disconnect the first chip from at least one DC motor control circuit and connect the second chip to the at least one DC motor control circuit when the first chip fails, so that the second chip controls the parking brake motor corresponding to the at least one DC motor control circuit. The present invention also relates to a vehicle body stabilization system, an automobile, a control method for a parking brake system, and a computer storage medium.

This invention relates to a hybrid energy storage railway power regulator technology under a virtual motor control system. It introduces a virtual inertial element into the current compensation strategy of the railway power regulator and employs virtual DC motor control in the hybrid energy storage system. Power quality is managed through the railway power regulator, and regenerative braking energy is recovered and utilized by connecting to the hybrid energy storage device. A segmented adaptive power allocation strategy based on the filtering time constant of the energy storage unit's state of charge and a dynamic adjustment strategy for limited power within the hybrid energy storage system are adopted. By adjusting the filtering time constant, "shallow charging and discharging" of the battery is ensured, with the supercapacitor handling the remaining power after the battery bears part of the load. A virtual inertial element is introduced to provide inertial support compared to the traditional control of railway power regulators, and virtual DC motor control is used for the hybrid energy storage system. This results in frequency stability under load fluctuations, as well as better dynamic performance and anti-interference capabilities.

The present invention discloses a metal-encapsulated high-power DC motor control module and interlock circuit. The module includes a control circuit configured with: an input circuit, including a forward control circuit for providing a forward rotation trigger signal, a reverse control circuit for providing a reverse rotation trigger signal, a bias circuit for providing bias excitation to ensure that the output circuit has no output when the forward control circuit and the reverse control circuit lose power, and an interlock circuit for ensuring that the control circuit has only one valid steering control signal; an isolation drive circuit configured to convert the input circuit output into an optical signal, and then convert the optical signal into an electrical signal as a control signal output; and an output circuit configured to achieve on-off switching of the control circuit output under the control signal output by the isolation drive circuit. The control module provided by the present invention does not require an additional delay circuit, has a simple circuit structure, and is free of electromagnetic interference.

The utility model provides an analog AC / DC motor control system for detecting an air conditioner control panel, which is characterized in that a DCPG motor driving signal receiving circuit is used for being respectively connected to an output signal end of a DCPG motor driving circuit of a detected control panel and is used for receiving a control signal sent by the DC motor driving circuit of the detected control panel or a PG of the detected control panel; the received signal level conversion circuit is connected with the DC motor driving signal receiving circuit and the PG motor driving signal receiving circuit and is used for converting a control signal into a level and inputting the level to the central processing unit for identification processing; the feedback signal output circuit is connected with the central processing unit through the output signal level conversion circuit, and the feedback signal is sent to the feedback input end of the DC motor drive circuit or the PG motor drive circuit of the tested control board after being converted into a level. According to the utility model, the working circuit simulating the DCPG motor is arranged to communicate with the DCPG motor driving circuit of the tested control board, and whether the circuit function of the tested control board is normal or not is judged through the central processing unit.

A control circuit operatively attached to a motor is provided. The motor includes a first input and a second input and is configured to operate at a first speed and a second speed. The control circuit includes a first speed switch unit configured to connect the battery to the first input, a second speed switch unit configured to connect the battery to the second input, the second speed switch unit configured to block a current generated from a back electromotive force of the motor, and a braking switch unit interposed between the second speed switch unit and the second input, the braking switch unit configured to connect the motor to a ground to stop the motor from operating. The control circuit further including a free-wheeling diode and a discharge diode configured to dissipate and discharge inductive current generated by the motor.

The present application relates to the technical field of DC motor control, in particular to a DC motor stable commutation control system matching a multi-point rolling brush structure; comprising a data acquisition module, an observer module, a prediction module, a control decision module and a motor drive module; current, speed and mechanical vibration feedback data are collected, high-frequency jumping characteristics matched with rolling frequency are extracted, contact degradation entropy is solved, and its approximation rate to the failure boundary is calculated; when the contact degradation entropy is lower than the dangerous threshold, the first control instruction for maintaining the current torque output is output, and when it is higher than or equal to the dangerous threshold, the second control instruction for injecting damping current is output in combination with the approximation rate, so as to reduce the speed and rebuild the mechanical contact stability, reduce the risk of continuous spark, torque loss and drill tool jam.