Method and system for controlling magnetic levitation motor

• Main Authors: YANG XING, ZHANG SHAOYUN, JIANG HAIXIAO, HAN ZHICHENG, AO EN, QIN CANHUA, LI YU, YANG ZHUO, XU FENGXING, WEN LIANG, CHENG ZHENGLIN, DENG MING, ZHANG ZHE, HUANG QIZHAO, MENG WENHUI, HE YAPING, ZHANG ZHI, LUO HE, GUO SHIHUI, HE XI, LIU YUXIN
• Format: Patent
• Language: Chinese; English
• Published: 05.03.2021
• 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; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION

The invention discloses a method and system for controlling a magnetic levitation motor. The method comprises the steps: collecting and detecting a DC bus voltage and/or a feedback rotating speed of the magnetic levitation motor in real time when a network voltage drop phenomenon happens, and on the basis, determining the type of the current network voltage drop phenomenon; according to the network voltage drop phenomenon type, generating a response driving instruction conforming to the network voltage drop phenomenon type in a self-adaptive manner; and enabling a frequency converter to perform voltage closed-loop control on the direct-current bus voltage by utilizing a response driving instruction and to perform speed closed-loop control on the real-time rotating speed of the magnetic levitation motor, so that the magnetic levitation motor is prevented from undervoltage fault and safe operation or controlled shutdown under the control of an input voltage signal after the voltage closed-loop control is obtain