5results about How to "Improve transient response speed" patented technology

The invention discloses a low-dropout linear voltage stabilizing circuit. The low-dropout linear voltage stabilizing circuit comprises a power tube, a control module and a transient response module, the first end of the power tube is connected with power voltage, and the second end of the power tube is used for generating output voltage. The control module is used for controlling the output voltage to carry out voltage following on the input voltage and driving the power tube. The transient response module is used for generating a transient response signal based on the transient change of the output voltage. The control module also adjusts the driving capability of the power tube and / or adjusts the output voltage based on the transient response signal. According to the low-dropout linear voltage stabilizing circuit, the transient response speed is further improved through the extremely simple circuit extension design, meanwhile, the loop analysis difficulty is simplified, and the hardware cost is reduced. And the control module adopts a folded voltage follower architecture, naturally has a speed advantage, and is matched with the transient response module to further accelerate the driving of the power tube so as to realize quick response to the output voltage.

The application discloses a switching converter, a transient enhancement circuit thereof, a chip and electronic equipment. The switching converter comprises an error amplifier and a compensation network. The error amplifier is used for amplifying a feedback voltage of the switching converter and a reference voltage. The compensation network is used for converting a current amplified by the error amplifier into a voltage signal to control a switching duty cycle of a power switch tube. The transient enhancement circuit comprises a comparison module, a transconductance amplifier and a current control module. The comparison module is used for comparing the feedback voltage with a first threshold voltage and generating a mode control signal according to a comparison result. The transconductance amplifier is controlled by the mode control signal and is used for differentially transconducting and amplifying the feedback voltage and a second threshold voltage to generate a compensation current. The current control module is used for providing the compensation current to the compensation network according to a state of the mode control signal and a direction of the compensation current to improve a response speed of the compensation network.

The application discloses a self-disturbance rejection control method for an electrically excited synchronous motor based on joint simulation, which comprises the following steps: firstly, a finite element model of the motor is designed in Maxwell; then, an engineering is created and a motor driving circuit is built in Simplorer; a motor control circuit model is built in Matlab / Simulink; finally, the modules are connected to realize joint simulation of motor control. In Simulink, a linear self-disturbance rejection control theory is applied to design a current double closed loop controller for the motor, and a model auxiliary extended state observer is designed according to motor related parameters, so that the observation and elimination of disturbance in motor operation are realized. Compared with the prior art, the motor body, the driving circuit and the control system design are combined, the electrical and electromagnetic performance of the motor driving system is comprehensively considered through joint simulation, the complex control algorithm is combined with the motor parameters for simulation verification, and the accuracy and timeliness of the motor control system are improved, and the motor control system is closer to the actual situation.

This invention provides a fully digital wireless time and frequency synchronization system and method, applicable to the fields of positioning, navigation, and timing technology. The system includes: a signal transceiver module for bidirectional time transmission with a master node via a wireless channel and recording transmission and reception timestamps; a time measurement module for calculating time and frequency deviations based on the timestamps and generating a digital frequency control word; a microelectromechanical system (MEMS) oscillator module for receiving the frequency control word via a digital interface and adjusting the output frequency in real time; and a synchronizer module for generating a second pulse signal based on the adjusted frequency. The adjusted frequency is fed back to the signal transceiver module as a local clock driver, forming a closed-loop frequency control. This invention deeply integrates high-precision time measurement with a MEMS resonator, achieving fully digital closed-loop control. While maintaining advantages such as small size, low power consumption, and vibration resistance, it significantly improves the transient response speed and long-term stability of frequency synchronization and supports rapid customization of special frequency points.

The invention discloses a flux linkage suppression-based low-voltage ride-through control method, device and system for a grid-forming doubly-fed motor, and a storage medium, and belongs to the technical field of power generation, power transformation or power distribution. The method comprises the following steps: firstly, locking a network construction control unit and obtaining an internal potential phase based on a virtual synchronous machine principle when a voltage drop occurs in a power grid; the proportionality coefficient of the excitation flux linkage ring is dynamically adjusted, so that the system damping is maximized, and the attenuation of the transient component of the stator flux linkage is accelerated; on the basis, a rotor current instruction is generated in real time according to voltage and current capacity limitation of a rotor-side converter, and a modulation signal is output to drive the converter in combination with a feed-forward compensation strategy and a resonance controller. According to the method, rotor overcurrent and overvoltage during a fault period can be effectively suppressed without adding any hardware circuit, the attenuation speed of a transient flux linkage is remarkably improved, meanwhile, the reactive power supporting capacity of a unit to a power grid is enhanced, and high-performance low-voltage ride-through of the grid-forming type doubly-fed motor is achieved.