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Model Predictive Controller for Brushless DC Motor and Its Construction Method
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A brushed DC motor, model prediction technology, applied in current controller, motor generator control, electronic commutation motor control and other directions, can solve the problem of sampling and output asynchrony, avoid demagnetization, reduce control error, reduce The effect of a small amount of calculation
Active Publication Date: 2021-10-26
JILIN UNIV
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[0004] The invention provides a method for constructing a model predictive controller of a brushless DC motor, which calculates the voltage vector that should be applied in the next sampling period through the current of the current sampling period and the angular position of the rotor, and solves the problem of sampling in the traditional control method of the brushless DC motor. out of sync with the output
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Embodiment 1
[0053] The invention provides a method for constructing a model predictive controller of a brushless DC motor, comprising:
[0054] S101. Receive a prediction reference value calculation instruction, and acquire first data information;
[0055] S102, according to the first data information, calculate the predicted current i(k+1), the predicted rotational speed ω(k+1), and the predicted angular position θ(k+1);
[0056] S103, calculate the predicted duty cycle δ(k+1) and the predicted rotor angular position θ according to the predicted current i(k+1), predicted rotational speed ω(k+1), and predicted angular position θ(k+1) c (k+1);
[0057] S104, according to the predicted duty cycle δ(k+1) and the predicted rotor angular position θ c (k+1) output inverterswitching signal S a , S b , S c ;
[0058] S105, acquire the inverter switching signal S a , S b , S c Output brushless DC motor current.
[0059] Specifically, the brushless DC motor model predictive controller co...
Embodiment 2
[0062] The present invention provides a method for constructing a brushless DC motor model predictive controller, as shown in Question 1, including:
[0063] S101. Receive a prediction reference value calculation instruction, and acquire first data information;
[0064] S102, according to the first data information, calculate the predicted current i(k+1), the predicted rotational speed ω(k+1), and the predicted angular position θ(k+1);
[0065] S103, calculate the predicted duty cycle δ(k+1) and the predicted rotor angular position θ according to the predicted current i(k+1), predicted rotational speed ω(k+1), and predicted angular position θ(k+1) c (k+1);
[0066] S104, according to the predicted duty cycle δ(k+1) and the predicted rotor angular position θ c (k+1) output inverter switching signal S a , S b , S c ;
[0067] S105, acquire the inverter switching signal S a , S b , S c Output brushless DC motor current.
[0068] Further, a method for constructing a mode...
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Abstract
The invention discloses a method for constructing a model predictive controller of a brushless direct current motor, comprising: S101, receiving a prediction reference value calculation instruction, and obtaining first data information; S102, calculating the predicted current i(k according to the first data information +1), predicted rotational speed ω(k+1), predicted angular position θ(k+1); S103, according to the predicted current i(k+1), the predicted rotational speed ω(k+1), the Predicted angular position θ(k+1) calculates predicted duty cycle δ(k+1) and predicted rotor angular position θ c (k+1); S104, according to the predicted duty cycle δ(k+1) and the predicted rotor angular position θ c (k+1) output inverterswitching signal S a , S b , S c ; S105, obtain the inverterswitching signal S a , S b , S c The current of the brushless DC motor is output, which solves the problem of asynchronous sampling and output in the traditional control method of the brushless DC motor.
Description
technical field [0001] The invention relates to the technical field of motor control, in particular to a model predictive control method for a brushless DC motor. Background technique [0002] The brushless DC motor achieves electronic commutation with the help of an external motor controller, which overcomes the shortcomings of traditional DC motors such as high noise, sparks, short service life and difficult maintenance caused by brush mechanical commutation. In addition, the brushless DC motor also has the advantages of small size, high efficiency, less copper consumption, simple structure and reliable operation. Therefore, it has been widely used in fields such as automobiles, household appliances, robots, aerospace and medical equipment. The traditional method of controlling the brushless DC motor uses two PI controllers to control the motor speed and current. The disadvantage of PI control is that they only use the historical error information of the reference value a...
Claims
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