2results about How to "High current accuracy" patented technology

The invention relates to a permanent magnet synchronous motor control method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring stator voltage and stator current from the permanent magnet synchronous motor to the current moment, identifying a parameter vector of a data driving model which is trained for the permanent magnet synchronous motor in advance by utilizing each stator voltage and each stator current, and determining the current moment of the permanent magnet synchronous motor on the basis of the identified parameter vector and the data driving model. And obtaining a current prediction model for the permanent magnet synchronous motor, inputting the stator voltage and the stator current at the current moment into the current prediction model to obtain a predicted stator current at the future moment, and obtaining the predicted stator current at the future moment according to the predicted stator current at the future moment, the stator current at the current moment, the identified parameter vector and a preset objective function. And obtaining a target voltage vector at the future moment, and controlling the permanent magnet synchronous motor based on the target voltage vector at the future moment. By adopting the method, the prediction accuracy of the prediction model is improved, and the control accuracy of the permanent magnet synchronous motor is further improved.

The utility model discloses a three-phase program-controlled alternating current power source, which relates to the field of three-phase program-controlled alternating current power sources and comprises a digital DSP (digital signal processor) controller + large-scale FPGA (field programmable gate array) module, a three-phase alternating current power output module, a three-phase remembered sine wave generating circuit, a touch screen, a liquid crystal display module, a low-pass filter A, a low-pass filter B and a low-pass filter C, and the touch screen and the liquid crystal display module are connected with the digital DSP controller and the large-scale FPGA module. According to the utility model, the three-phase power source adopts a DSP + FPGA technology, a large-scale FPGA with powerful and flexible functions, an internal and external phase-locked closed-loop control technology, a high-speed and high-precision D / A and a high-fidelity power amplifier to form a new-generation high-precision standard power source, the frequency stability is high, the continuity is good, the precision of output voltage and current can reach 0.01 level, and a single-phase 0-380V, three-phase three-wire, high-precision and high-precision standard power source can be provided. And the three-phase four-wire alternating current voltage is 0-380V.