Brushless DC motor vector control system and construction method thereof
A brushed DC motor, vector control technology, applied in vector control systems, control systems, motor generator control and other directions, can solve problems such as safety hazards, system reliability reduction, and development constraints
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Embodiment 1
[0108] figure 1 It is a functional block diagram of the brushless DC motor vector control system of the present invention.
[0109] Such as figure 1 As shown, Embodiment 1 provides a brushless DC motor vector control system, including: a double closed-loop regulator, a SVPWM controller and an inverter; wherein the double closed-loop regulator includes a speed regulation outer loop and a current regulation inner loop loop, and the speed regulator of the outer loop of the speed adjustment is suitable for using a fuzzy neural network controller; a given speed is adjusted by the double closed-loop regulator and then input to the SVPWM controller; and the SVPWM controller is suitable for To generate a control pulse signal, which is used as a control signal of the brushless DC motor after inversion by the inverter.
[0110] Specifically, this brushless DC motor vector control system adopts the design scheme of double closed-loop intelligent control, which is to control the speed r...
Embodiment 2
[0145] On the basis of Embodiment 1, Embodiment 2 provides a method for constructing a brushless DC motor vector control system, including the following steps:
[0146] Step S1, creating a fuzzy neural network controller, determining the structure of the fuzzy neural network, using historical data samples to train and learn the fuzzy neural network, so as to obtain initial values of network weights and thresholds;
[0147] Step S2, optimize the parameters of the fuzzy neural network controller, and use the online supervised learning algorithm to adjust and optimize, so as to improve the dynamic performance of the fuzzy neural network controller;
[0148] Step S3, detecting the three-phase current, rotational speed and rotor position of the brushless DC motor as the feedback quantity of the vector control system of the brushless DC motor; and
[0149] Step S4, designing the motor temperature protection, overcurrent protection, short circuit protection, overvoltage and undervo...
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