Permanent magnet synchronous motor inductance identification algorithm based on incremental model reference adaptive system

Abstract

The invention relates to a permanent magnet synchronous motor inductance identification algorithm based on an incremental model reference adaptive system. The inductance identification algorithm comprises the following steps: (1) establishing permanent magnet synchronous motor discrete voltage equations in a period before last (k-2)Ts and a last period (k-1)T respectively; (2) building an incremental form mathematical model of a permanent magnet synchronous motor according to the step (1); (3) establishing a permanent magnet synchronous motor inductance identification algorithm based on the incremental model reference adaptive system on the basis of the step (2) in combination with a model reference adaptive system principle: u(k-1)=uq(k-1)-uq(k-2), wherein iq(k) and Lq(k) are identification results of q shaft current and q shaft inductance of a stator of the permanent magnet synchronous motor at a current control period respectively, and are estimated values of iq(k); epsilon(k) is a difference output by a reference model and an adjustable model; the increment (uq(k-1)-uq(k-2)) of a reference voltage is non-zero; beta is an adaptive gain as well as an identification result of Ts / Lq(k). The permanent magnet synchronous motor inductance identification algorithm can be widely applied in the field of inductance identification of the permanent magnet synchronous motor.

Description

technical field [0001] The invention relates to a motor inductance identification algorithm, in particular to an incremental model reference self-adaptive permanent magnet synchronous motor inductance identification algorithm. Background technique [0002] With the continuous improvement and improvement of the performance of permanent magnet materials and the gradual maturity of the research and development experience of permanent magnet motors, permanent magnet synchronous motors are developing towards high power, high performance and miniaturization. Due to the use of permanent magnets to provide air-gap flux, permanent magnet synchronous motors have the advantages of simple structure, small size, light weight, low loss, and high efficiency, and have been widely used in high-performance servo control and other fields. [0003] High-performance applications of permanent magnet synchronous motors usually require accurate and fast control of electromagnetic torque. The elect...

AI Technical Summary

Problems solved by technology

The existing motor parameter identification schemes often use the d and q axis voltage equations as the motor mathematical model, and identify multiple motor parameters such as resistance, inductance, and flux linkage at the same time, which makes the system complex and usually requires a considerable amount of calculation.

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