Permanent magnet synchronous motor parameter identification system based on improved least-squares method

Abstract

The invention discloses a permanent magnet synchronous motor parameter identification system based on an improved least-squares method. The real-time resistance value, the real-time inductance value and the real-time permanent magnet magnetic chain value of a permanent magnet synchronous motor are identified through a permanent magnet synchronous motor parameter collecting system and a control system by using a parameter identification algorithm based on the improved least-squares method. The identification system comprises a permanent magnet synchronous motor parameter collection system, a permanent magnet synchronous motor control system and a parameter identification algorithm, wherein the permanent magnet synchronous motor parameter collection system comprises a voltage collector, a current collector and a rotating speed collector; the voltage collector, the current collector and the rotating speed collector are connected with a tested permanent magnet synchronous motor through data transmission wires; the permanent magnet synchronous motor control system uses a sine wave vector control system with the direct axis current id being 0; and the parameter identification algorithm uses the permanent magnet synchronous motor parameter identification method based on the improved least-squares method. The permanent magnet synchronous motor parameter identification efficiency can be improved; the identification speed is accelerated; and the parameter identification accuracy can be ensured.

Description

technical field [0001] The invention relates to a permanent magnet synchronous motor parameter identification system, in particular to a permanent magnet synchronous motor parameter identification system based on an improved least square method. Background technique [0002] Nowadays, due to the continuous development of motor control theory and control technology, as well as the urgent requirement of high-precision motor control technology, researchers pay more attention to improving the control performance of permanent magnet synchronous motors by obtaining high-precision motor parameters in real time. If the parameters of the designed controller do not match the parameters of the controlled motor properly, it will have an impact on the control performance of the entire system. [0003] At present, the main methods at home and abroad are to set some motor parameters as fixed values ​​for identification, to use the special state of the motor for motor parameter identificati...

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Problems solved by technology

These methods not only have high cost, slow parameter identification efficiency, and low applicability, but also the identified parameters cannot be changed in real time to keep consis

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