52 results about "Dsp controller" patented technology

The invention discloses a fast charging protocol control device compatible with multiple fast charging protocols, and the device is characterized in that a Type-C controller is connected with a tested fast charging power supply and a main DSP controller, and achieves the control modes of PD2.0 and PD3.0 fast charging protocols of the tested fast charging power supply; the ADC1 and the ADC2 are respectively connected with the tested fast charging power supply and the main DSP controller, the main DSP controller is connected with the electronic load, and a control mode of ID identification of the tested fast charging power supply is realized; the DAC1 and the DAC2 are respectively connected with the tested fast charging power supply and the main DSP controller, the main DSP controller is connected with the electronic load, and the control mode of QC2.0 and QC3.0 fast charging protocols of the tested fast charging power supply is realized; and the Timer is connected with the main DSP controller and the tested fast charging power supply to realize a control mode of AFC, FCP and SCP fast charging protocols of the tested fast charging power supply.

The invention relates to the technical field of energy storage control, and discloses an energy storage converter control circuit, which comprises a first DSP controller, an FPGA processor and an ARM processor, and is characterized in that the first DSP controller is used for controlling the operation of an energy storage converter; the FPGA processor is connected with the first DSP controller and the ARM processor and used for processing communication data transmitted by the ARM processor and caching a processing result, the first DSP controller controls the operation of the energy storage converter based on the processing result, and the ARM processor is used for carrying out data interaction with a preset external management system and obtaining communication data of the preset external management system. According to the invention, a DSP + FPGA + ARM topological architecture is constructed, and the FPGA processor carries out data preprocessing, so that the real-time control performance of the first DSP controller is ensured, and the real-time performance of the control of the energy storage converter is improved.

The invention belongs to the field of power electronics, relates to the technical field of inverter design, and provides a silicon carbide MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor)-based high-switching-frequency inverter which comprises a parallel S C inverter, a direct-current bus capacitor and a DSP (Digital Signal Processor) controller. The parallel Si C inverter comprises a plurality of parallel bidirectional bridge arm inverters, and the output end of each bidirectional bridge arm inverter is connected with a Hall sensor CT. And one end of the direct current bus capacitor is connected with the positive terminal of the parallel Si C inverter, and the other end of the direct current bus capacitor is connected with the negative terminal of the parallel Si C inverter. The DSP controller comprises a plurality of driving circuits, a current sampling circuit and a PWM control signal conversion circuit. According to the inverter, under the condition that the power frequency of the inverter is ensured and the quality of the output waveform is not influenced, the volume and the weight of the filter inductor and the filter capacitor are greatly reduced, and the requirement of product weight limitation is met.

The invention discloses a capacitor on-line monitoring method based on a time-frequency domain joint model. The method is suitable for DC-Link capacitor state evaluation of power electronic equipment. Capacitive current is dynamically reconstructed through port current of an active inductor and a switching signal, and dependence on a special sensor is eliminated. An equivalent series resistance (RESR) is calculated based on a power loss model in a time domain, a 300Hz harmonic component is combined in a frequency domain to decouple a capacitance value, and synchronous high-precision monitoring of the RESR and the capacitance value is achieved. Simulation and experiments show that the RESR monitors error lt; 4%, capacitance error lt; and the monitoring period can be shortened to 30ms. According to the method, a main circuit does not need to be transformed, the method can be deployed in a DSP controller in an embedded mode, and a real-time non-intrusive state monitoring solution is provided for equipment such as an active inductor and a frequency converter.

The invention belongs to the field of digital twinning of power electronic equipment, and discloses a high-power isolation type bidirectional DC-DC converter digital twinning system and method. Comprising a physical IBDC converter, a data sampling system, an information interaction system, a converter DSP controller system, a twin DT-IBDC converter system, a model fusion system, an FPGA real-time calculation simulation system and a data visualization system. The method has important significance on IBDC converter state monitoring, fault diagnosis, performance optimization and full life cycle health management, can be widely applied to various types of IBDC converter systems, and has important application value and economic benefit.

The invention provides a DC-DC converter based on triple BOOST and a control method, and the DC-DC converter is characterized in that the output end of an EMI filter is connected to the input end of a pre-charging module, the output end of the pre-charging module is connected to a triple BOOST main topology module, and the triple BOOST main topology module is connected with a DSP controller; the EMI filter is used for inhibiting overflow of disturbance voltage and disturbance current of the DC-DC converter and preventing external surges and high-voltage pulses from entering the DC-DC converter; the pre-charging module is used for realizing pre-charging of the DC-DC converter; the triple BOOST main topology module is used for improving the current limitation of the input end and reducing the input end current of each BOOST circuit in the triple BOOST main topology module; and the DSP controller is used for controlling the triple BOOST main topology module. And stable operation of the non-isolated DC-DC converter in high-power wide-range input voltage is realized.

The invention discloses a modular multilevel matrix converter layered architecture device and a control method thereof. The invention discloses a layered architecture device. Comprising a three-phase AC input system, a bridge arm circuit, a three-phase AC output system, a DSP controller circuit, an FPGA controller circuit, an isolation driving circuit, a protection circuit, a starting circuit, an input voltage and current sampling circuit, an output voltage and current sampling circuit, a bridge arm voltage sampling circuit, a bridge arm current sampling circuit, a sampling signal conditioning circuit and an observer. According to the invention, the observation of the capacitor voltage of the M3C bridge arm sub-module is realized by using the observer, the number of voltage sensors and sampling circuits is reduced, the reliability of the system is improved, and the hardware cost is reduced; the hierarchical control method enables the control program to be easy to modify, update and transplant, reduces the workload of developers, and improves the control real-time performance.

The invention relates to the technical field of electronics, and discloses a VOT compensation-based single-phase interleaved CRM PFC digital control system and method, and the system comprises a DSP controller, a first power loop, a second power loop, a first off-chip comparator, a second off-chip comparator, and a driver. An EPWM driving module, an ADC sampling module, an on-chip DC digital comparator module and a TZ trigger interrupt module are integrated in the DSP controller, a 2P2Z controller, a voltage feedforward operation unit, a current detection verification unit and a temperature protection unit are further arranged in the DSP controller, the TZ trigger interrupt module is provided with a TZ2 pin and a TZ3 pin, and the EPWM driving module is provided with a first comparison register CMPA, a period register TBPRD and a second comparison register CMPB. The first power loop and the second power loop form a single-phase and two-phase staggered Boost topology, and the two Boost circuits are staggered and connected in parallel at a 180-degree initial phase and are jointly connected to the same PFC bus. According to the invention, the circuit design is simplified, the dynamic stability of inductive current interleaving is optimized, and the THD index of the power supply is improved.

The utility model discloses an intelligent temperature control type fire-fighting pipeline heat preservation device which comprises a heat preservation assembly used for heat preservation of a fire-fighting pipeline, the heat preservation assembly comprises heat preservation pads used for heating the fire-fighting pipeline, the heat preservation pads are externally connected with a control unit, and the top of each heat preservation pad is fixedly connected with an elastic retaining ring used for connecting a plurality of heat preservation pads. The bottom of the heat preservation pad is fixedly connected with a connecting hook used in cooperation with the elastic retaining ring. According to the utility model, a plurality of heat preservation pads can be conveniently spliced and combined by arranging the elastic retaining rings and the connecting hooks, and different numbers of heat preservation pads can be spliced and combined according to the diameters of different fire pipelines, so that the practicability of the heat preservation pad is greatly improved; meanwhile, the control unit is arranged to monitor the temperature of the fire-fighting pipeline in real time, and the DSP controller is used for controlling the operation of the electric heating sheet in real time, so that the intelligence of the heat preservation device for the fire-fighting pipeline is improved.

This invention discloses a protection threshold correction method, system, device, and medium, belonging to the field of power systems. The method comprises: a control measurement circuit measuring a first reference physical quantity in a power circuit to obtain multiple first sampling signals; processing each first sampling signal using initial parameters of a DSP controller to obtain each first digital signal; fitting each first digital signal and each first reference physical quantity to obtain DSP target parameters; a control signal generator outputting multiple analog signals to the sampling circuit; a comparator circuit triggering a protection action when the current sampling signal is greater than a trigger threshold; the DSP determining the actual protection threshold corresponding to the current digital signal based on the target parameters and the current sampling signal; and finally obtaining a preset protection threshold and correcting the actual protection threshold using the target parameters. Therefore, by implementing this invention, protection thresholds can be accurately calibrated without power instruments, reducing errors and improving the reliability of hardware protection in power electronic devices.

The invention relates to the technical field of air compressor control, and particularly discloses an uninterruptible power supply system and method for an air compressor control system, a main power supply module outputs stable voltage through filtering, power factor correction and voltage stabilization processing; and the standby power supply module takes the lithium iron phosphate storage battery pack as a core and is matched with the conversion circuit to output same-frequency and same-phase alternating current. And the switching regulation and control module realizes gapless switching between the main power and the standby power through synchronous detection and the bidirectional thyristor switch group. The state monitoring module collects data in multiple dimensions, the intelligent control module analyzes the state and issues an instruction based on the DSP controller, and the energy storage management module achieves accurate charging and discharging and battery equalization adjustment. Power supply is continuous and stable, quality is high, energy consumption is low, operation and maintenance are convenient, continuous operation of the air compressor control system can be guaranteed, and production interruption is avoided.

The utility model relates to a charger power module sampling compensation circuit, including resistance -capacity partial pressure network, voltage follower, differential current sampling amplifier and first low pass filter, resistance -capacity partial pressure network is used for gathering voltage signal from power module output end, and the voltage signal is scaled down with the existing bias voltage each other superimposes and generates input signal and then is delivered to voltage follower, voltage follower is used for generating first signal based on input signal, differential current sampling amplifier is used for gathering current signal from the current sampling resistance of power module output end and converts current signal into second signal, and second signal can generate third signal with first signal superposition, first low pass filter converts third signal into final sampling signal and exports final sampling signal to DSP controller, the utility model discloses under the condition that guaranteeing LLC resonant converter output voltage wide range, has reduced the overhead of DSP controller.

The invention discloses a copper loss minimum control system and method for a variable flux reluctance motor, and the method comprises the steps: converting the electric energy of a DC power supply into a six-phase "AC + DC" mixed current through a six-phase winding and a six-phase inverter, superposing a positive polarity DC voltage (+ Vdc) according to A, C and E phases, and superposing a negative polarity DC voltage (-Vdc) according to B, D and F phases, thereby forming a positive and negative symmetrical current superposition structure. A DSP controller is adopted to carry out dq conversion to obtain a d-axis current component and a q-axis current component; pI control is adopted to generate instruction voltage, the amplitude of a direct current component and the amplitude of an alternating current component of a DC current component and the amplitude of an AC current component are dynamically adjusted, Idc: Iac = 1: 2, the phase current effective value Is = Idc2 + Idc22 is minimum at the moment, and copper loss minimization is achieved. The method does not need an independent magnetic coil, simplifies the structure, improves the efficiency, is suitable for high-efficiency operation in a wide rotating speed range, and is especially suitable for electric vehicles and other scenes with high motor efficiency requirements.

The invention discloses an active filtering and reactive compensation adaptive control method, and belongs to the technical field of rail transit power systems. The method comprises the steps that S1, real-time monitoring is conducted, an active power filter (APF) is connected into a power grid and controlled by a DSP controller to be switched between an operation mode and a shutdown mode, and the DSP controller is electrically connected with a communication interface; s2, condition monitoring is triggered, switching between an operation mode and a shutdown mode is achieved, and the switching modes comprise automatic switching according to the rail transit operation time period and remote switching by receiving an instruction through a communication interface of a DSP controller; s3, dual-mode purification of electric energy quality: in an operation mode, an active power filter APF starts a harmonic compensation function and dynamically tracks a target power factor in a reactive mode; and in the shutdown mode, the active power filter APF closes the harmonic compensation function and outputs fixed inductive reactive power. The operation time period of the rail transit is matched with the two modes of the active power filter APF, so that the self-adaptive control of the electric energy quality can be realized according to the operation condition of the rail transit.

The application provides an underwater single-capacitance wireless power transmission system and an automatic tuning method, and belongs to the field of power transmission.The system comprises a power supply, a load, a primary side full-bridge converter, a secondary side full-bridge converter, an energy transmission electrode plate, a primary side signal sampling module, a secondary side signal sampling module and a DSP controller.The power supply, the primary side full-bridge converter, the energy transmission electrode plate, the secondary side full-bridge converter and the load are sequentially connected to transmit the current at the power supply to the load.The primary side signal sampling module collects the primary side voltage and current, the secondary side signal sampling module collects the secondary side voltage and current, the primary side voltage and current and the secondary side voltage and current are transmitted to the DSP controller through WiFi, the DSP controller calculates the ZVS angle according to the primary side voltage and current, calculates the system efficiency according to the primary side voltage and current and the secondary side voltage and current, and adjusts the working frequency of the primary side full-bridge converter.The application improves the stability and efficiency of underwater power transmission.

The application provides a wireless power supply method and system for a high-power underwater vehicle and a charging pile. The system comprises a transmitting unit, a receiving unit, a wireless communication module and a magnetic coupling module. The transmitting unit comprises a DC power supply, a first rectification and voltage stabilization circuit, a high-frequency inverter circuit, a transmitting side compensation circuit and a DSP controller. The receiving unit comprises a receiving side compensation circuit, a second rectification and voltage stabilization circuit, a charging management module, a power battery and a circuit sampling module. The DSP controller is configured to generate a phase shift angle control signal and a switching frequency adjustment signal based on electrical signals fed back by the transmitting unit and the receiving unit during charging of the underwater vehicle with the built-in receiving unit by the transmitting unit, so as to adjust the current output of the transmitting unit and maintain the resonance state. Through the above technical solution, a high-power, high-efficiency and high-stability underwater wireless power supply system suitable for dynamic marine environments is constructed.

The utility model discloses a simple and practical low-power frequency converter circuit, which comprises a switching power supply, a rectification filter circuit, a brake bleeder circuit, a three-phase inverter circuit, a main controller circuit and a protection circuit, according to the embodiment, a DSP control technology, a high-frequency switching power supply technology and a power device integration technology are combined, and a low-power frequency converter circuit which is all-directionally protected, light and practical is designed. Firstly, a high-frequency switching power supply is used for providing a low-voltage direct-current power supply, so that the size and weight of the circuit are reduced; secondly, high-frequency clutters of the circuit are filtered by using a large capacitor, comprehensive protection of overvoltage, over-temperature and overcurrent is realized by using an intelligent power module, and the anti-interference capability and the safety of the circuit are improved; and thirdly, the circuit utilizes a DSP (Digital Signal Processor) controller to conveniently realize the algorithm control of the motor and realize the variable-frequency variable-voltage energy-saving control of the motor. In a word, the circuit is light in structure, safe, stable, energy-saving, consumption-reducing, comprehensive in function, suitable for the fields of elevators, textiles, numerical control and the like, high in cost performance and high in practicability.

The invention discloses a six-axis laser welding robot control system and method.The six-axis laser welding robot control system comprises an image collecting and processing system and a motion control system, and the image collecting and processing system comprises a CCD mechanism and an ARM microprocessor used for welding position image processing and welding path planning; the motion control system comprises two DSP controllers, DSP control chips are arranged in the DSP controllers, the DSP controllers are in signal communication with the ARM microprocessor, one DSP controller is used for controlling a servo motor of a three-axis galvanometer scanning welding system in the laser welding robot, and the other DSP controller is used for controlling a servo motor of a three-axis galvanometer scanning welding system in the laser welding robot. And the other DSP controller is used for controlling a servo motor in a three-axis automatic workpiece grabbing and lifting robot in the laser welding robot. The control system and the control method are used for motion control of the laser welding robot, so that the laser welding robot has better workpiece welding quality and efficiency.

The invention discloses a photovoltaic and energy storage compatible low-voltage spare power automatic switching control method and device, which is applied to a group of main and standby power supply switching systems, and comprises the following steps: utilizing an integrated hybrid inverter module at the moment of a mains supply fault, and performing dynamic buffering through an energy storage battery before an ATS physically disconnects a main power supply; compensating the difference between the power required by the load and the current photovoltaic actual output power so as to maintain the stability of the voltage and frequency of the load side; under the condition that the electric energy quality of the load side is not sensed, seamless switching from the mains supply to the photovoltaic energy storage combined power supply mode is carried out; and after the switching is completed, dynamically adjusting the discharge depth and rate of the energy storage according to the real-time illumination intensity and load change through a self-adaptive impedance matching algorithm. According to the invention, the hybrid inverter integrated with the high-speed DSP controller and the voltage source type inversion topology is arranged, so that smooth, efficient and seamless switching and cooperative power supply among the power grid, photovoltaic power, energy storage and load can be realized in the automatic switching execution process of the power grid.

This invention relates to the field of reactive power compensation technology in power distribution networks, and particularly to a method and device for coordinated optimization of reactive power compensation in rolling mills. It achieves dynamic reactive power compensation for system loads by supplying power to SVG and FC via the main transformer. The SVG employs a fully controlled H-bridge chain structure, adjusting the trigger pulse to ensure its output voltage is in phase and frequency with the system voltage. A DSP controller monitors grid parameters in real time, dynamically adjusting the SVG's continuously adjustable reactive power output within the inductive to capacitive range. The FC provides fixed capacitive reactive power support. A comprehensive protection and self-diagnostic system is configured to achieve multi-level protection and rapid fault location and isolation. The advantages of this invention are: the use of an H-bridge chain SVG structure based on fully controlled IGBTs, combined with DSP fully digital control, enables continuous and rapid adjustment from rated inductive to capacitive capacity, reducing response time, effectively tracking severe fluctuations in rolling mill loads, significantly improving the power factor, and reducing voltage fluctuations and flicker.

The three-dimensional galvanometer scanning laser welding robot control system comprises an image collecting and processing system and a motion control system, the image collecting and processing system comprises a 3D laser radar and a microcomputer used for welding position image processing and welding path planning, and the motion control system comprises two DSP controllers. A DSP control chip is arranged in each DSP controller, the DSP controllers are in signal communication with the microcomputer, one DSP controller is used for controlling a servo motor of a four-axis galvanometer scanning welding system in the laser welding robot, and the other DSP controller is used for controlling a servo motor of a four-axis automatic butt joint loading and unloading SCARA robot in the laser welding robot. The invention further discloses a control method of the three-dimensional galvanometer scanning laser welding robot, and the control system and the control method are used for motion control of the laser welding robot, so that the laser welding robot has better workpiece welding quality and efficiency.

The invention discloses a starting torque maximization control system of a variable flux reluctance motor, which relates to the field of current superposition and dual-mode control, and is characterized in that a six-phase winding and a six-phase inverter are used for generating six-phase'alternating current + direct current 'mixed current, A, C and E phases are superposed with positive direct-current voltage, and B, D and F phases are superposed with negative direct-current voltage. The current sensor collects six-phase current to synthesize virtual three-phase current, and the DSP controller carries out dq conversion to separate d-axis and q-axis components. During starting, the d-axis current is preferentially increased to 1.2-1.5 times of a rated value (continuously smaller than or equal to 100 ms) to rapidly build a magnetic field, meanwhile, the q-axis current is controlled to output the maximum torque according to the maximum torque-current ratio, the rotating speed reaches a preset threshold value (mode switching is triggered when the rotating speed reaches the preset threshold value, and the current ratio is dynamically adjusted to optimize operation. The method is realized in real time through a dynamic proportion optimization algorithm based on a rapid magnetic field establishment technology of six-phase current superposition.

The present application relates to a multi-step model predictive control method and a DSP controller based on hysteresis control, and belongs to the field of high-performance model predictive control technology. The present application can use a linear extrapolation method to predict the prediction parameters corresponding to the voltage vector in multiple steps, if any parameter of the prediction parameters corresponding to the voltage vector at the previous moment does not meet the preset hysteresis range condition, and there are prediction parameters corresponding to the voltage vector in the voltage vector set corresponding to the target moment that meet the hysteresis range condition, until any parameter of the prediction parameters corresponding to the voltage vector does not meet the hysteresis range condition, and obtain the prediction step corresponding to the voltage vector; construct a cost function according to the prediction step corresponding to the voltage vector, and determine the target voltage vector that matches the switching range of the switch sequence; use the target voltage vector to output pulses to drive the inverter switch tube, thereby improving the model predictive control effect and making it more practical.

According to the independent driving system for the excitation coils of the electromagnetic flowmeter and the calibration and driving method, the two excitation coils of the electromagnetic flowmeter are each independently provided with a driving power source, and the two excitation coils are driven to generate independent magnetic fields respectively; the DSP controller is used for coordinately controlling the magnitude of the output current of the two driving power supplies, and adjusting the spatial distribution of a resultant magnetic field after the superposition of the two independent magnetic fields in the measuring tube to reach an optimal state, so that a higher signal-to-noise ratio can be obtained under the condition that the excitation coil adopts a smaller driving current, and the measurement accuracy and stability are ensured on the basis of ensuring the measurement accuracy and stability. The power consumption of the electromagnetic flowmeter can be greatly reduced; besides, after the digital power supply is adopted, when the electromagnetic flowmeter is applied on site, the working parameters of the digital power supply can be adjusted according to on-site working conditions, so that the actual use of the electromagnetic flowmeter is very flexible, and the on-site adjustment and maintenance service of the electromagnetic flowmeter is greatly facilitated.

The utility model provides a servo driver control module, and relates to the technical field of servo control. The module comprises a DSP (Digital Signal Processor) controller module, a serial port communication module, a CAN (Controller Area Network) communication module, a reset module, a driver enabling module, a limit switch module, a parallel bus to serial port module and a power supply module, the DSP control module provides six paths of 422 serial ports to the outside, wherein four paths of 422 serial ports are transferred out by utilizing the parallel bus-to-serial port module; the parallel bus-to-serial port module uses a parallel bus-to-serial port chip to expand four paths of serial ports; the driver enabling module utilizes an electromagnetic relay and a relay driver, adopts IO pin weak current of a DSP to control strong current, and controls enabling or disabling of a driver signal. The limit switch module provides the signal of the limit switch for the motor driver after providing up-down pulling of the output signal of the limit switch; the problems that an existing servo driving method is poor in real-time performance and high in computer compatibility requirement, or only one-to-one servo control can be achieved, and expansibility is poor are solved.

The invention discloses a circuit board test device and system and a test control method thereof, and the device comprises an FPGA controller which receives a control instruction of an external DSP controller through a communication module, and issues a first control signal to a signal collection module under the control of the control instruction; the signal acquisition module acquires an acquisition electric signal at a test point corresponding to the circuit board to be tested through an electrically connected probe array according to the received first control signal, and transmits the corresponding acquisition electric signal to the FPGA controller; and the FPGA controller judges whether the test point corresponding to the circuit board to be tested is normal or not according to the received acquisition electric signal. According to the invention, an automatic and intelligent test process is realized, whether the circuit board to be tested is normal or not can be rapidly and accurately judged, the whole test device is small in size and simple in structure, the production cost can be effectively reduced, the product quality and the production efficiency can be improved, and large-scale batch production and application are facilitated.

The invention discloses a protection circuit for detecting drain-source voltage of a SicMOSFET based on a high-speed isolation operational amplifier, which is applied to a motor driver of a motor and comprises an impact suppression circuit arranged in an electric driver circuit, the input end of the impact suppression circuit is connected with a capacitor and an inverter bridge in parallel, the impact suppression circuit is provided with a SicMOSFET tube, and the SicMOSFET tube is connected with the inverter bridge in parallel. The output end of the SicMOSFET is connected with a high-speed isolation operational amplifier conditioning circuit, the high-speed isolation operational amplifier conditioning circuit is used for detecting drain-source voltage of the SicMOSFET, and the output end of the high-speed isolation operational amplifier conditioning circuit is connected with a DSP controller. According to the invention, the drain-source voltage of the SicMOSFET tube can be monitored in real time, the DSP controller is matched to drive the motor to work in different states according to the value of the drain-source voltage, the current passing through the SicMOSFET tube is reduced, the SicMOSFET tube is protected from being damaged due to overheating, and the use reliability of the impact suppression circuit of the motor driver is improved.

The invention discloses a control method and system based on a brushless direct current motor, the method is operated in a controller with a DSP as a core, and the DSP controller comprises an enhanced pulse width modulation module and an enhanced capture module; the method comprises the following steps: querying a commutation vector table to determine a corresponding motor rotor position according to a captured Hall signal of the brushless direct current motor; according to the rotor position, multiple paths of PWM control signals are generated through multiple output channels of an enhanced pulse width modulation module and are output to corresponding motor driving chips; according to the PWM control signal, a power switch tube in the three-phase full-bridge inverter circuit is driven to be switched on and switched off, and commutation and continuous rotation of the brushless direct current motor are controlled; the duty ratio of the output waveform is adjusted, the equivalent voltage applied to the three-phase full-bridge inverter circuit is changed, and the rotating speed of the brushless direct current motor is adjusted; the DSP controller adjusts the query logic of the commutation vector table or controls the output state of the enhanced pulse width modulation module, and changes the rotation direction of the motor or executes a stop operation.

The application discloses an airborne rectifier power frequency transient control system, and relates to the technical field of power supply, which comprises an alternating voltage sampling circuit, an alternating current sampling circuit, a zero-crossing detection circuit, a driving circuit and a DSP controller. When the input voltage frequency is in a steady state interval, the DSP controller works in a double closed loop PID decoupling control mode based on coordinate transformation. The DSP controller sends the calculated pulse driving signal to the power converter through the driving circuit after amplification, so that the rectifier power output voltage is kept stable. When the input voltage frequency is transient, the DSP controller superimposes input voltage feedforward control on the basis of the double closed loop PID decoupling control algorithm based on coordinate transformation, so as to improve the power grid voltage utilization rate and keep the rectifier power output voltage stable. The stable control of the output voltage is realized when the rectifier power input voltage frequency is transient due to the sudden change of the rear-end load or the sudden change of the engine speed.

The embodiment of the utility model discloses a vehicle-mounted audio processing tool which comprises a platen, a sliding groove is formed in the platen, a sliding block is installed in the sliding groove, the top of the sliding block is fixedly connected with a containing cylinder used for containing a loudspeaker, a dust cover is installed above the platen, and the dust cover is arranged at one end of the sliding groove in a covering mode. A groove is formed in the inner bottom of the sliding groove, a sound sensor is installed in the groove, and a vertically-through round hole is formed in the sliding block. A plug-in port and a color-changing lamp are mounted on the bedplate; the device further comprises a DSP controller, the signal output end of the sound sensor is connected with the signal input end of the DSP controller, and the plugging port and the color-changing lamp are connected with the DSP controller. According to the invention, pollution of stains, welding dust and soldering flux during welding can be avoided, and the sound quality is improved; after welding is completed, the device can be directly powered on to carry out pronunciation testing, and products with unqualified pronunciation quality caused by poor welding or other reasons are detected.