Daughter circuit board for interface signal conversion

摘要

A daughter circuit board of a brushless DC motor for interface signal conversion, having circuit units integrated on the daughter circuit and eight ports for communicating with a control system of a user terminal. The daughter circuit board is plugged into a motor controller for signal conversion so that the motor controller communicates with the control system of the user terminal. The eight ports include a signal input port of analog control, a signal port for activating a fan mode, signal ports of speed feedback, a reserved signal port, a port of COM, a port of DC power supply, and a R/T port.

主权项

1. A daughter circuit board for interface signal conversion, comprising:
a) a plurality of circuit units integrated on the daughter circuit board; and b) eight ports for communicating with a control system of a user terminal;wherein said eight ports comprise:
M1: a signal input port of analog control, which has a voltage of 9-40 V DC, a frequency of 75-166 Hz, and a current of <10 Ma, and signals passing through the port being converted by a first signal conversion circuit (1) of the daughter circuit board; M2: a signal port for activating a fan mode, signals passing through the port being converted by a second signal conversion circuit (2) of the daughter circuit board; M3 and M4: signal ports of speed feedback, which are connected to a third signal conversion circuit (3) of the daughter circuit board, and output n pulses per rotation; M5: a reserved signal port, signals passing through the port being converted by a fourth signal conversion circuit (4) of the daughter circuit board; M6: a port of component object mode (COM), which is a ground line of signal lines and a common terminal of control signals; M7: a port of DC power supply, which has a voltage of 8-30 V, and a current of <30 mA; and M8: a R/T port, which is connected to a bidirectional asynchronous half-duplex communication data line (5) of the daughter circuit board, for data transmission between the daughter circuit board and the control system of the user terminal.