Control method without position sensor

• Main Authors: CHENG ZHENLEI, GUO JIAHU, JU ZHENYU, ZHOU SHUPENG
• Format: Patent
• Language: Chinese; English
• Published: 30.01.2024
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The invention discloses a position sensorless control method, relates to the technical field of position sensorless control, and solves the technical problem that the speed range of a position sensorless control algorithm is limited. A super-spiral sliding mode algorithm and a phase-locked loop (PLL) are introduced on the basis of a sliding mode observer (SMO) to obtain a super-spiral sliding mode observer (STSMO), and the super-spiral sliding mode observer (STSMO) is adopted to detect a position signal of a permanent magnet synchronous linear motor (PMSLM) at a medium speed and a high speed; detecting a position signal of the PMSLM at a low speed by adopting a pulsating high-frequency voltage injection method; selecting an estimation algorithm according to an operation area where the rotor speed is located; the position sensorless control algorithm is smoothly switched from a low-speed domain algorithm to a medium-high-speed domain algorithm, and the method is high in stability and free of jitter in speed sw