Patent ID: 8860350
Filing Date: 2014-10-14
Classification: F04D,Y02B

Abstract:
1. A motor driving apparatus applied to a fan and motor mechanism and a voltage supply unit, the motor driving apparatus including: a motor driving unit electrically connected to the fan and motor mechanism and the voltage supply unit; a voltage division resistor, one side of the voltage division resistor electrically connected to the voltage supply unit, the other side of the voltage division resistor electrically connected to the motor driving unit; a first resistance adjustment module, one side of the first resistance adjustment module electrically connected to the other side of the voltage division resistor; a diode, a cathode of the diode electrically connected to the other side of the voltage division resistor and one side of the first resistance adjustment module; a second resistance adjustment module, one side of the second resistance adjustment module electrically connected to the voltage supply unit, the other side of the second resistance adjustment module electrically connected to an anode of the diode; a transistor switch, a first side of the transistor switch electrically connected to the anode of the diode and the other side of the second resistance adjustment module; a pulse width modulation unit; and a seventh resistor, one side of the seventh resistor electrically connected to the pulse width modulation unit, the other side of the seventh resistor electrically connected to a second side of the transistor switch, wherein the first resistance adjustment module comprises: a first resistor, one side of the first resistor electrically connected to the other side of the voltage division resistor and the cathode of the diode; a first switch unit, one side of the first switch unit electrically connected to the other side of the first resistor; a second resistor, one side of the second resistor electrically connected to the other side of the voltage division resistor and the cathode of the diode; a second switch unit, one side of the second switch unit electrically connected to the other side of the second resistor, wherein the second resistance adjustment module comprises: a fourth switch unit, one side of the fourth switch unit electrically connected to the voltage supply unit; a fourth resistor, one side of the fourth resistor electrically connected to the other side of the fourth switch unit, the other side of the fourth resistor electrically connected to the first side of the transistor switch and the anode of the diode; a fifth switch unit, one side of the fifth switch unit electrically connected to the voltage supply unit; a fifth resistor, one side of the fifth resistor electrically connected to the other side of the fifth switch unit, the other side of the fifth resistor electrically connected to the first side of the transistor switch and the anode of the diode, wherein the first resistance adjustment module is electrically connected to the second resistance adjustment module in series; turning on or off the first switch unit and the second switch unit determines a resistance value of the first resistance adjustment module; turning on or off the fourth switch unit and the fifth switch unit determines a resistance value of the second resistance adjustment module.