Motor controller with flexible protection modes

A motor controller for use in a motor system includes a mode select circuit, a fault detection circuit, a protection logic circuit, and a motor control circuit. The mode select circuit sets the motor controller in one of an internal protection mode and an external protection mode. The fault detection circuit detects whether the motor system is operating in a normal operation state or a fault state. If the motor system is operating in the fault state, the protection logic circuit outputs a protection signal in the internal protection mode, and keeps the protection signal inactive while activating an external diagnostic signal in the external protection mode. The motor control circuit controls a motor of the motor system in response to a speed control signal when the protection signal is inactive, and in response to the protection signal when the protection signal is active. 本发明提供的种用于电机系统中的电机控制器包括模式选择电路、故障检测电路、保护逻辑电路和电机控制电路。所述模式选择电路将所述电机控制器设置在内部保护模式和外部保护模式中的者下。所述故障检测电路检测所述电机系统是在正常操作状态还是故障状态下操作。如果所述电机系统在所述故障状态下操