Magnetization state selection method and online control method for optimal control of full-speed efficiency of adjustable-flux permanent magnet synchronous motor
A technology of permanent magnet synchronous motor and magnetization state, which is applied in the direction of motor control, motor generator control, AC motor control, etc. Accurately select the magnetization state with the best motor efficiency, etc., to achieve the effect of small calculation, fast iteration convergence speed, and improved operation performance
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specific Embodiment approach 1
[0115] Specific embodiment one: the following combination Figure 1 to Figure 9 This embodiment will be described. The method for selecting the optimal control magnetization state for the full-speed domain efficiency of an adjustable-flux permanent magnet synchronous motor described in this embodiment is as follows:
[0116] Step 1. Under the given motor magnetization state, torque command, speed command, voltage limit, and current limit, obtain the minimum current amplitude of the motor under m different magnetization states according to the full-speed domain efficiency optimal control current trajectory search method. The current operating point is obtained, and the MAP map of the motor efficiency when the motor efficiency is optimally controlled in the full speed domain under m different magnetization states is obtained;
[0117] Figures 4 to 7 What is given is the efficiency MAP map corresponding to m=4 magnetization states when the optimal control of the efficiency in t...
specific Embodiment approach 2
[0260] Specific embodiment two: the following combination Figure 10 This embodiment is described. The online control method for the optimal control of the full-speed domain efficiency of an adjustable-flux permanent magnet synchronous motor described in this embodiment adopts the optimal control of the full-speed efficiency of the adjustable-flux permanent magnet synchronous motor in the first embodiment to control the magnetization. The state selection method obtains multiple current operating points of the motor under different magnetization states and in the full speed range, including the current operating point obtained by the MTPA control method below the base speed value, and the optimal control method of the field weakening area efficiency above the base speed value. Obtained current operating point;
[0261] Taking these current operating points as sample data, the training generates the full-speed domain efficiency optimal control neural network model. The input of ...
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