Control method of permanent magnet synchronous motor based on mtpa without parameter and without position sensor

Abstract

The invention discloses a permanent magnet synchronous motor control method based on MTPA without parameters and without position sensing, which contains a current control mode, including step 1: receiving the given current Idq* and γ angle input by the user, and calculating Id_r* and Iq_r *; Step 2: Find the corresponding Φ angle in the MTPA data table according to Id_r* and Iq_r*; Step 3: Calculate Id_Ref and Iq_Ref by using the Φ angle, Id_r* and Iq_r*; Step 4: Real-time operation through the current Iq_Ref and the motor The feedback current Iq of the feedback current Iq is input into the PLL phase-locked loop to obtain θv, and the PI processing of the current Id_Ref and the feedback current Id of the real-time operation of the motor is used to obtain Vq. In MTPA mode, Vd=0, Vdq=Vq, and θv and Vdq can be used Obtaining Vα and Vβ, so as to realize the control of the current, its algorithm is simplified, the operation is simple, the chip resource occupation is reduced, the cost is reduced, and the motor is highly dependent on the motor resistance Rs, inductance Lq, Lq and magnetic flux λm bottleneck problem.

Description

Technical field: [0001] The invention relates to a permanent magnet synchronous motor control method based on MTPA without parameters and without position sensing. Background technique: [0002] At present, there are generally three control methods for position sensorless vector control permanent magnet synchronous motors: constant torque control mode, constant speed control mode, or constant air volume control mode. [0003] For example, U.S. Patent No. 7,525,269 discloses a position sensorless 3-phase synchronous motor motor vector controller, which only discloses a current torque control mode for constant torque control. [0004] Chinese patent CN103929109 (A) also discloses a constant speed control method based on position sensorless vector control permanent magnet synchronous motor. [0005] Such as figure 1 As shown, the general block diagram of constant torque control is shown as figure 1 As shown, since the torque T is only related to the q-axis current, according...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a permanent magnet synchronous motor control method based on MTPA without parameters and without position sensing, so as to solve the problem of conventional FOC theory in the prior art for estimating the rotor position. , takes up a lot of control chip resources, has high requirements on the microprocessor MCU, and is a technical problem with high cost

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