17results about How to "Simple control strategy" patented technology

The invention relates to the technical field of automobile thermal management, in particular to a thermal management control method and system for an energy storage system of a power battery pack for an automobile. Comprising the steps of setting discharging time and charging time of an energy storage system; the temperature of a battery pack cell in the energy storage system and the current temperature in the cabin are collected within the preset time before the set discharging time and the set charging time; determining whether the air conditioner needs to be started or not based on the battery cell temperature, when it is determined that the air conditioner needs to be started, determining the air conditioner starting time and mode based on the battery cell temperature, the cabin temperature and the target temperature, and controlling the air conditioner to be started according to the determined mode when the starting time is determined, and the preset target temperature is reached when the energy storage system is discharged or charged. The control method is simple, the air conditioner in the energy storage system can be controlled in advance, and when the energy storage system starts to be charged or discharged, the battery pack in the energy storage system is in a good temperature environment.

The invention discloses a wireless electric energy transmission system based on a semi-active rectifier, which comprises an input power supply Vin, a transmitting side inverter unit, a transmitting side compensation circuit, a transmitting coil Lp, a receiving coil Ls, a receiving side compensation circuit, a receiving side semi-active rectifier and a load RL, one active bridge arm of the full-bridge active rectifier is replaced by a passive bridge arm which is composed of two diodes and does not need to be controlled, soft switching of all switching tubes on the receiving side is guaranteed while rectifier control is simplified, and a secondary side resonance current zero crossing point sampling circuit is simplified by utilizing the passive rectification characteristic of the passive bridge arm. The designed output voltage control and secondary side resonance current zero crossing point detection circuit is simple, convenient to control and easy to implement, and has a good application prospect.

The invention belongs to the field of security in a multi-core system chip, and discloses a security bus architecture for a multi-core Chiplet chip system, which comprises five parts, namely an active intermediate layer, a functional chip, a storage chip, a Core chip and a security chiplet, and is characterized in that the Core chip comprises a CPU core of the chip system; the storage chip comprises a memory for storing data and codes; the functional chip comprises most peripherals and functional IPs; the active interposer is used for connecting all the chiplets and realizing access control of each chiplet, and the security chiplet is used for managing and controlling security configuration of the whole chip system. When a chiplet provided by a supplier cannot be trusted, the secure bus architecture can isolate and restrict access to non-secure chiplets. A bus architecture is realized in a secure active interposer, and the access authority of each small chip in a chip system is configured by a secure small chip, so that the data access of other small chips can be ensured to be controlled, and the system security is enhanced.

The invention discloses a double-transistor flyback circuit control method, circuit and chip, and the method comprises the steps: a drive controller detects whether a drive power supply of a first switching tube needs to be forcibly charged, if yes, a second pin is controlled to output a high level, and if not, a second pin is controlled to output a high level; the second pin is controlled to charge a driving power supply of the first switch tube through a power supply connected with the third pin, after charging is completed, the second pin is controlled to output a low level, otherwise, the second pin and the first pin are controlled to output a high level at the same time, so that the second switch tube and the first switch tube are turned on at the same time; when a signal for turning off the switching tube is detected, the first pin is controlled to output a low level to turn off the first switching tube, and the second pin is controlled to output a low level to turn off the second switching tube after waiting for a first preset time.

This invention discloses a direct control method for torque and axial force of a linear rotary switched reluctance motor. First, the sector containing the flux linkage vector is determined through calculation. Based on the flux linkage hysteresis signal and the torque hysteresis signal, the voltage vector required for control is determined. Then, the axial force is controlled within the control range of (-15°, 15°) where the rotor position is selected. The corresponding axial force voltage vector is selected based on the axial force hysteresis signal. Finally, the operating mode of each power converter switch is determined based on the signs of all voltage vectors. This invention significantly reduces torque and axial force pulsation by directly controlling the motor's torque and axial force, resulting in a faster system response. Operating modes for the torque winding and axial force winding are established separately for torque and axial force, respectively, leading to more reasonable vector selection. Furthermore, no model calculation is performed during the control process, so the control accuracy does not depend on the analytical model, improving the system response speed and simplifying the control strategy.

The application discloses a kind of all-around intelligent flexible ultrasonic transducer detection device and method, belong to medical ultrasonic detection technical field, the present application is by upper protective layer, metal shielding layer, insulating filler layer, upper layer printing electrode, piezoelectric layer, lower layer printing electrode, lower protective layer composition, wherein piezoelectric layer is by many piezoelectric array element composition radial multilayer ring belt, printing electrode layer is flexible electrode with "spider web structure" and "island-bridge" structure, metal shielding layer is added between protective layer and insulating layer absorption and reflection external electromagnetic wave;Annular positive pole is always connected with ultrasonic acquisition card channel, only need to make negative pole channel alternate connection, different angle radial array element can be made to work simultaneously, can be automatically attached skin, with flexibility and stretch performance, simultaneously using "ring-diameter" addressing flexible circuit design and addressing mode, less occupied ultrasonic acquisition card channel, and can realize automatic multiple position and multiple angle all-around ultrasonic detection.

A motor cooling and lubrication system for a hybrid transmission comprises an oil tank, a filter, and an oil cooler. The oil tank is connected to an oil inlet of the filter through a main oil circuit. The oil inlet of a first mechanical pump is connected to a first oil outlet of the filter through a first oil circuit. The oil outlet of the first mechanical pump is connected to the oil cooler. The first mechanical pump is driven by a gear circumferentially fixed on an input shaft of the transmission. The oil inlet of a second mechanical pump is connected to a second oil outlet of the filter through a second oil circuit. The oil outlet of the second mechanical pump is connected to the oil cooler. A first bypass is provided between the oil outlet of the second mechanical pump and the second oil circuit. A second bypass is provided between the oil inlet of the second mechanical pump and a downstream end of a second one-way valve. A driven gear of the second mechanical pump meshes with a main reduction gear of a differential. The oil outlet of the oil cooler provides cooling and lubricating oil to a bearing subsystem, a motor stator, and an electronic rotor through a cooling and lubricating oil circuit. The bearing subsystem and the motor stator are respectively connected to the oil tank through an oil return circuit.

The present invention relates to an electromagnetic tooth clutch structure, which belongs to the technical field of automobile clutches. The electromagnetic tooth clutch structure of the present invention comprises a shaft, a coil assembly, a push ring assembly, a clutch driving gear and a clutch passive gear; an annular accommodating space is formed between the coil assembly and the shaft, the push ring assembly is arranged in the annular accommodating space, the push ring outer ring contacts the inner end of the coil assembly, and the push ring inner ring contacts the outer periphery of the bearing; the push ring inner ring is adjacent to the clutch driving gear, and the clutch driving gear and the clutch passive gear are adjacent. When the coil assembly is energized, an electromagnetic field is generated and the push ring assembly pushes the clutch driving gear to engage with the clutch passive gear. After the electromagnetic coil is de-energized, the clutch driving gear is separated from the clutch passive gear under the action of the return spring. The electromagnetic tooth clutch structure of the present invention has a simple control strategy and can be used in demanding occasions such as passenger car transmissions, and can meet the requirements of high-speed working conditions.

The invention relates to the technical field of semitrailers, in particular to a new energy driven particle powder material transportation semitrailer which comprises a data acquisition system, a data analysis system, a control system and a correction system. The data acquisition system acquires a parameter set and road condition information; the data analysis system judges a dominant abnormal state based on the pressure gradient and the electrification rate, and judges a recessive abnormal state based on the response amplitude; the control system adjusts torque distribution of a driving shaft or suspension damping based on the cooperation coefficient during dominant abnormity, and adjusts the suspension height and / or in-tank auxiliary vibration frequency based on the response damping ratio during implicit abnormity; and the correction system calculates the comprehensive change rate after the primary adjustment, and dynamically adjusts the preset comprehensive change rate in combination with the road condition information to judge whether the secondary adjustment is performed or not. According to the method, explicit and implicit abnormity accurate identification and secondary adjustment optimization in the particle powder material transportation process are achieved, and the transportation safety and the material fluidity are effectively improved.

This application relates to the field of control rod drive mechanism testing technology, specifically, to a drive mechanism testing system employing an overrunning clutch. The system includes a base, a fixed bracket, a long shaft, a photoelectric encoder, a magnetic powder brake, a torque sensor, an inertia disk, an overrunning clutch, a control mechanism, and a drive mechanism. The photoelectric encoder is fixed to the left side of the photoelectric encoder bracket; the magnetic powder brake is positioned between the photoelectric encoder bracket and the inertia bracket, and the torque sensor is positioned outside the magnetic powder brake; the long shaft is positioned between the inertia bracket and the clutch bracket; the inertia disk is connected to the long shaft via a key; the overrunning clutch is positioned between the clutch bracket and the mechanism bracket; the control mechanism is located above the overrunning clutch; and the drive mechanism is fixed to the right side of the mechanism bracket. This application simplifies the operation of the drive mechanism by utilizing the overrunning clutch, requiring only the detection of the drive mechanism's initial and final positions, and using the time difference to calculate the drive mechanism's reset time.

The invention discloses a dual-frequency flyback converter with high dynamic response. The dual-frequency flyback converter comprises a basic flyback converter, a synchronous Buck converter and a diode D2, the basic flyback converter comprises a direct current input source uin, a power switch S1, an excitation inductor Lm, a leakage inductor Lk, a transformer T, a rectifier diode D1 and an output capacitor Co; the synchronous Buck converter comprises an auxiliary capacitor Cvt, a power switch S2, a power switch S3 and an inductor Lvt. The circuit is simple in structure, a traditional flyback converter and the synchronous Buck converter are reasonably connected through the diode D2, the leakage inductance energy utilization rate of the flyback converter is effectively improved, the dynamic response performance of the traditional flyback converter can be effectively improved on the occasion with high output precision, and the reliability of the flyback converter is improved. The overshoot and the adjustment time of the voltage when the load changes are greatly reduced, and the stability of the system is improved.

The present invention discloses a power control method and device for a charging station combined with long-term monitoring and analysis, and relates to the field of charging management technology. The method comprises: for a charging station, collecting equipment configuration and architecture, and constructing a station diagram structure. At the same time, a timing monitoring and analysis channel is established, including long-term and short-term monitoring, to evaluate the power conversion state. Based on the station diagram, equipment-independent and station-global analysis links are established, and the timing monitoring channel is accessed to obtain a power conversion evaluation. Through analysis and evaluation, the abnormal operation risks of charging equipment and stations are identified. Finally, for abnormal risks, the control targets are located, control analysis is performed, and power control strategies are formulated to smooth or eliminate risks. Thereby achieving the technical effect of improving load adaptability and simplifying control strategies.

The invention relates to the technical field of torque ripple suppression, in particular to a permanent magnet synchronous motor torque ripple suppression method based on feedforward compensation. The method comprises the following steps: S1, establishing a mathematical model of the permanent magnet synchronous motor; s2, analyzing factors causing torque pulsation through electromagnetic parameters and mechanical parameters based on the mathematical model of the permanent magnet synchronous motor; s3, according to an analysis result, designing a fluctuation model based on discrete Fourier transform; s4, generating a compensation signal based on Fourier series expansion by using the designed fluctuation model; and S5, combining the generated compensation signal with an existing control system in a superposition mode, and adding the superposed compensation signal into a control instruction of the permanent magnet synchronous motor to smooth torque output. Through the design and application of the feedforward compensation signal, the method can effectively counteract the periodic torque ripple caused by the cogging effect, the magnetic field nonuniformity, the inverter switching frequency and other factors.

The application provides a dual-source power mine truck isolation type DCDC control method, system and medium, the method comprises the following steps: step 1: the monitoring and comparison of the battery pack state of charge; step 2: the generation of the current reference value; step 3: comparing the current reference value with the actual DC output current feedback value to obtain the current error value, using the deadbeat predictive control algorithm to process the current error value to obtain the outward moving phase angle, and controlling the current flow between each battery pack by real-time adjustment of the outward moving phase angle.The application has the advantages of high efficiency, low maintenance cost, etc., can effectively suppress the electromagnetic interference between the dual-source power circuits, ensure the stable operation of the mine truck, optimize the battery pack energy management, improve the power utilization rate, and ensure that each component can obtain the required appropriate power.

The application discloses a kind of full-power fuel cell hybrid power system high-efficiency control method, belong to control technical field;Including the following steps: obtaining the current operating parameters of vehicle, and hydrogen fuel cell operating parameter, according to the demand information obtained, calculate the demand information of vehicle and hydrogen fuel cell operating information, and then determine the current operating state of vehicle and the current working state of hydrogen fuel cell;In different vehicle operating state, according to the calculated vehicle demand information and hydrogen fuel cell working state, determine whether to switch the working state of hydrogen fuel cell;According to the determination result, switch the working state of hydrogen fuel cell, so that hydrogen fuel cell works in the most efficient area.The application can make hydrogen fuel cell in the case of participating in work as far as possible in the best working area, so that the performance of hydrogen fuel cell is in higher area, effectively improves the overall efficiency of vehicle;Control strategy is simple, real-time good.

This invention relates to wireless power transfer technology, specifically a single-tube inverter AC envelope modulation wireless power transfer system and control method. The system includes a transmitter and a receiver. The transmitter includes an input AC power supply, a dual-winding AC transformer, a rectifier and filter circuit, a DC / DC module, a single-tube inverter transmitter circuit, a first control module, and a drive circuit module. The receiver includes a receiving circuit, a high-frequency envelope demodulation network, an electrical load, a zero-crossing detection module, and a second control module. The zero-crossing detection module detects the output envelope voltage state to obtain a control signal, and the first control module controls the step-up / step-down state of the DC / DC module based on the envelope state. The advantages are: compared to traditional AC-AC envelope modulation wireless power transfer systems, it further simplifies the circuit structure, reduces the number of switching devices and the drive circuit, further simplifies the control strategy, reduces the harmonic content on the system input side, increases the power factor, and reduces the impact of the input voltage waveform.

The application discloses a bidirectional AC-DC-AC PWM converter control system based on RT-Lab, which comprises a signal acquisition module, a driving pulse output module and a sampling signal processing module, a control logic switching module, a coordinate transformation module, a grid-side converter control module, a machine-side converter control module, a control signal modulation module and a control pulse output module realized in an RT-lab digital real-time simulation machine; the control logic switching module judges according to a DC-side voltage collected by the signal acquisition module, selects the grid-side converter control module or the machine-side converter control module for control, the grid-side converter control module or the machine-side converter control module calculates an instruction space voltage vector by adopting a preset control strategy, and driving pulses are generated by the control signal modulation module, the control pulse output module and the driving pulse output module to control the grid-side converter or the machine-side converter. The application can quickly and effectively control the bidirectional AC-DC-AC PWM converter.