A control method, system and storage medium of a permanent magnet synchronous motor
A technology of permanent magnet synchronous motor and control method, which is applied in the direction of control system, vector control system, motor generator control, etc., can solve the problem that the sliding mode variable structure cannot be applied to the permanent magnet synchronous motor control system, and achieve small overshoot, Small fluctuations, reducing the effect of chattering problems
Active Publication Date: 2021-07-23
NANJING NARI GROUP CORP +1
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Problems solved by technology
However, the introduction of sliding mode variable structure means that the system faces high-frequency chattering when switching the sliding mode surface, and this kind of chattering can be infinitely fast in theory. If the chattering cannot be controlled within a reasonable range, Then the sliding mode variable structure will not be applied to the permanent magnet synchronous motor control system
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[0062] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0063] Such as figure 1 As shown, the control method of the permanent magnet synchronous motor provided by the embodiment of the present invention includes the following steps:
[0064] Step A: collect the rotor position and three-phase current of the permanent magnet synchronous motor respectively;
[0065] Step B: Calculate the current rotational speed of the rotor according to the collected rotor position of the permanent magnet synchronous motor;
[0066] Step C: Calculate the rotor speed deviation according to the current speed of the rotor and the preset target speed of the rotor;
[0067] Step D: Using a fractional-order sliding mode speed controller to analyze and calculate the rotor ...
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The invention discloses a control method, system and storage medium of a permanent magnet synchronous motor. The method includes: calculating the current rotational speed of the rotor according to the collected rotor position of the permanent magnet synchronous motor; The rotor speed deviation is calculated by the speed; the fractional order sliding mode speed controller is used to analyze and calculate the rotor speed deviation to obtain the reference quadrature axis current; the coordinate transformation of the collected three-phase current of the permanent magnet synchronous motor is carried out to obtain the current quadrature axis current; Calculate the reference space voltage vector according to the reference quadrature axis current and the current quadrature axis current; control the inverter of the permanent magnet synchronous motor according to the reference space voltage vector, so as to achieve the purpose of controlling the permanent magnet synchronous motor. The present invention introduces a fractional-order sliding mode controller, and utilizes the gradually forgotten characteristics of the fractional-order calculus theory, which greatly weakens the chattering problem caused by the introduction of sliding mode variable structure, and has the advantages of small overshoot, fast response and small fluctuation advantage.
Description
technical field [0001] The invention relates to a control method, system and storage medium of a permanent magnet synchronous motor, belonging to the technical field of motors. Background technique [0002] In the use and application of engineering, due to the potential problems of the structure of PMSM and the control circuit, the motor commutator will produce torque ripple, and random noise, vibration and other problems that are harmful to the motor will follow. [0003] The sliding mode variable structure is introduced into the permanent magnet synchronous motor control system because of its advantages of improving system stability and system robustness, which helps to improve the adaptability and control accuracy of PID parameters. However, the introduction of sliding mode variable structure means that the system faces high-frequency chattering when switching the sliding mode surface, and this kind of chattering can be infinitely fast in theory. If the chattering cannot ...
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IPC IPC(8): H02P21/00H02P21/18H02P21/05
CPCH02P21/0007H02P21/05H02P21/18
Inventor 倪禛霖刘福锁摆世彬项丽张红丽郜建良王玉张承义邹德龙陶泉霖
Owner NANJING NARI GROUP CORP