Feedforward control of permanent magnet synchronous motor drive under current sensing failure

• Main Authors: ZHANG ZHE, NAMBURI KRISHNA MOHAN PAVAN KUMAR, GOVINDU VARSHA, PRAMOD PRERIT
• Format: Patent
• Language: Chinese; English
• Published: 26.05.2020
• 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; LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; MOTOR VEHICLES; PERFORMING OPERATIONS; TRAILERS; TRANSPORTING

According to one or more embodiments, an example system includes a motor, and a motor control system that includes a low side current measurement subsystem. The system further includes a processor that switches the motor control system to use feedforward current control in response to detecting a current measurement failure in the low side current measurement subsystem. The processor further identifies a first phase that has a failed current measurement. The processor also computes a current measurement for the first phase, which has the current measurement failure. The processor further usesthe computed current measurement to compute a parameter estimate. 根据一个或更多个实施例，示例系统包括马达以及包括低侧电流测量子系统的马达控制系统。该系统还包括处理器，该处理器响应于在低侧电流测量子系统中检测到电流测量故障，将马达控制系统切换为使用前馈电流控制。处理器还识别具有故障电流测量的第一相。处理器还计算具有电流测量故障的第一相的电流测量。处理器还使用计算出的电流测量来计算参数估计。