초록 ▼

An actuator position control system for brush-type DC motors. The system includes a sensing inductor, amplifier, central control unit (microprocessor), and motor driver. The system utilizes the differential signal di/dt to indicate the falling edges of commutation spikes in the motor current profile

An actuator position control system for brush-type DC motors. The system includes a sensing inductor, amplifier, central control unit (microprocessor), and motor driver. The system utilizes the differential signal di/dt to indicate the falling edges of commutation spikes in the motor current profile. An inductor is selected as the signal sensor, because voltage drops across the inductor are directly proportional to di/dt. The voltage drop, L(di/dt), across the inductive sensor is input to the amplifier, amplified, and then sent to the microprocessor. The microprocessor reads the output pulses from the amplifier and compares the pulse count to an input command signal. The microprocessor then sends shaft position control information to the motor driver.

대표청구항 ▼

1. A position control system for an actuator comprising:a driving circuit coupled to a motor; a sensing inductor connected in series with said motor through said driving circuit for sensing a signal from said motor; an amplifier for receiving and amplifying the sensed signal; and a microprocessor fo

1. A position control system for an actuator comprising:a driving circuit coupled to a motor; a sensing inductor connected in series with said motor through said driving circuit for sensing a signal from said motor; an amplifier for receiving and amplifying the sensed signal; and a microprocessor for receiving and counting incoming pulses from said amplifier to obtain a pulse count, said microprocessor comparing the pulse count with a command input and, responsive to a difference between said pulse count and said command input, issuing a command signal to said driving circuit to initiate driving of said actuator.