8results about How to "Improve output waveform" patented technology

The invention relates to the field of inversion, in particular to a DC / AC converter and a control method thereof. The DC / AC converter comprises a DC side bridge arm, an AC side bridge arm, a transformer connected between the DC side bridge arm and the AC side bridge arm, and a controller connected with the DC side bridge arm and the AC side bridge arm. In the process that the first characteristic parameter of the AC side of the DC / AC converter is close to 0, the controller controls the absolute value of a first phase shift angle between the DC side bridge arm and the AC side bridge arm to be gradually increased; in the process that the first characteristic parameter is far away from 0, the controller controls the absolute value of the first phase shift angle to be gradually reduced; the first characteristic parameter is alternating current or alternating voltage. According to the technical scheme, the switching frequency is not limited by the maximum switching frequency, the output waveform is improved, and the performance of the DC / AC converter is remarkably improved.

This invention discloses a variable-wave arc welding power supply control method, arc welding equipment, control device, and storage medium. Applied to an arc welding equipment, the equipment includes a coordination control module and at least two power conversion modules. The coordination control module is connected to the controlled terminals of each power conversion module to control the switching of the power conversion modules to form and output pulse power. The output terminals of each power conversion module are connected in parallel to superimpose the electrical energy of the arc welding power supply. The variable-wave arc welding power supply control method includes: the coordination control module outputting its corresponding control commands to each power conversion module; and each power conversion module adjusting the pulse width and on / off timing of the pulse power according to the control commands to increase the power or voltage amplitude of the arc welding power supply. This design optimizes the output waveform of the welding power supply, enabling it to provide excellent dynamic characteristics and improve welding performance.

The invention discloses a low-power inverter based on software and hardware combination and a debugging method thereof, and the inverter comprises a power supply module which comprises a DC / DC step-down conversion circuit and a step-down chip; the DC / DC step-down conversion circuit is used for converting a fixed input DC voltage into a variable DC voltage; the step-down chip is used for reducing the variable direct-current voltage to obtain the required output direct-current voltage; the full-bridge inverter circuit is used for responding to the control signal and converting the set direct-current voltage output by the power supply module into alternating-current voltage; the LC filter circuit is used for filtering the alternating-current voltage to obtain filtered output alternating-current voltage; the control module comprises a PID (Proportion Integration Differentiation) controller for generating a control signal; and the neural network controller obtains real-time state information of the inverter and performs real-time adjustment on the control signal through a pre-trained neural network model according to the real-time state information. The frequency and the voltage amplitude of the low-power inverter are adjustable, and the low-power inverter has a stable output sine alternating-current voltage frequency oscillogram.

The utility model discloses a novel acousto-optic modulator, which relates to the technical field of integrated photonics and comprises a bottom fixing plate, an acousto-optic modulator body is fixedly mounted at the upper end of the bottom fixing plate, and a sealing cover plate is detachably mounted on the upper surface of the acousto-optic modulator body. A thin film layer is installed in the acousto-optic modulator body. According to the novel acousto-optic modulator, the film layer, the epoxy resin, the film waveguide, the ceramic limiting part and the electro-acoustic transducer are arranged, the epoxy resin and the ceramic limiting part can fix the position of the film layer and improve the temperature stability, the interruption part of the film waveguide is separated, and three groups of electrodes are uniformly dispersed; compared with the prior art, better light spot quality and output waveform can be obtained, the modulation frequency is improved, the sealing cover plate is arranged on the surface of the acousto-optic modulator, internal parts of the acousto-optic modulator body can be maintained and replaced after the acousto-optic modulator is detached, the whole acousto-optic modulator does not need to be detached, and maintenance is very convenient.

The invention belongs to the technical field of nuclear power, and particularly relates to a high-voltage frequency converter harmonic control method and a filter. According to the method, the harmonic component in the output voltage of the frequency converter can be effectively reduced. According to the method disclosed by the invention, a relatively high fundamental frequency is obtained through modulation, and the voltage utilization rate is improved, so that the torque ripple of the motor is remarkably reduced. Under the same switching frequency, the method disclosed by the invention can generate the optimal output waveform. While the waveform quality is ensured, the switching frequency and the switching loss are reduced, and the overall efficiency of the system is improved.

A power converter based on a high-efficiency synchronous rectification circuit is characterized in that three groups of switch tubes are connected in parallel to a secondary side, namely a synchronous rectification end, of a transformer, and each group consists of two MOS (Metal Oxide Semiconductor) tubes, so that the current derating is improved, and the current is increased; the conduction internal resistance is reduced, and the efficiency is improved; the output end voltage is prevented from upside down; a synchronous rectification driving controller is added in the synchronous rectification circuit, so that the secondary side output waveform of the transformer is optimized, the conduction of a switching tube is facilitated, and the loss is reduced; current at the output end of the transformer is weak, and the synchronous rectification driving controller is added for current expansion, so that the driving capability is enhanced.

The invention discloses a hedging system and method based on inversion output of double inverters. The hedging system based on the inversion output of the double inverters comprises at least two inverter units, an SPWM waveform controller and a feedback module. The inverter unit is used for converting direct current into alternating current and has a control logic for generating a control signal matched with an output waveform rule; aC output ends of the inverter units are connected with each other so as to output a required AC voltage; the SPWM waveform controller is used for generating a pulse width modulation signal matched with the output waveform rule so as to control the on-off state of the inverter unit; and the feedback module is used for monitoring the output of the inverter unit in real time and feeding back the monitoring result to the control logic for closed-loop regulation. According to the invention, the control process can be simplified, the dependence on external hardware is reduced, and the output waveform of the inverter can be improved.

This invention discloses a condition monitoring and control system for a permanent magnet motor driven by an oil drilling rig, relating to the field of permanent magnet motor condition monitoring technology. It includes a data acquisition and construction module, a data preprocessing and feature extraction module, a dynamic monitoring and trend analysis module, a deep learning evaluation module, and a fuzzy control and real-time compensation module. The data acquisition and construction module first acquires real-time operating data of the inverter during operation through data acquisition equipment. The acquired real-time data is stored in a time-series format, and a dataset is established to provide complete and accurate basic data for subsequent analysis and model evaluation. This invention improves the stability, reliability, and energy efficiency of the permanent magnet motor driven by the oil drilling rig through real-time data acquisition, deep learning evaluation, fuzzy control optimization, and error compensation, adaptively adjusting the dead time, reducing short-circuit risk, energy loss, and harmonic damage, optimizing system performance, and improving operating efficiency.