03-10-2013 дата публикации
Номер: US20130258612A1
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. 234. The daughter circuit board of claim 1 , wherein the port M is at a low level claim 1 , and the port M is an open collector output.37. The daughter circuit board of claim 1 , further comprising an identify circuit () claim 1 , wherein{'b': '7', 'the identify circuit () is a voltage divider circuit comprising serially-connected resistors;'}{'b': 7', '7, 'one port of the identify circuit () is connected to a power supply, another port of the identify circuit () is connected to the ground; and'}an output port BSEL of the indentify circuit is connected to an input port of a micro control unit (MCU) of the motor controller.43. The daughter circuit board of claim 1 , wherein the third signal conversion circuit () is connected to a pulse counter.51234. The daughter circuit board of claim 1 , wherein the first claim 1 , second claim 1 , third claim 1 , and fourth signal conversion circuits () claim 1 , () claim 1 , () claim 1 , and () are conventional photoelectric coupling circuit units.61234. The daughter circuit board of claim 2 , wherein the first claim 2 , second claim 2 , third claim 2 , and fourth signal conversion circuits () claim 2 , () claim 2 , () claim 2 , and () are conventional photoelectric coupling circuit units.71234. The daughter circuit board of claim 3 , wherein the first claim 3 , second claim 3 , third claim 3 , and fourth signal conversion circuits () ...
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