Variable speed fan motor

摘要

A variable speed fan motor, including a variable speed motor body and a motor controller. The motor controller includes a microprocessor, an inverter circuit, a gear detection circuit, and a power supply. The gear detection circuit includes a plurality of current sensing units. Only one of the power input lines is in an energized state, and remaining power input lines are in a deenergized state. Each power input line is connected to one current sensing unit. An output end of the current sensing unit is connected to an input end of the microprocessor. The microprocessor selects operating parameters of the motor according to a detected signal of energization state of each power input line. The microprocessor is connected to the series communication unit. The microprocessor communicates with an external device via the series communication unit.

主权项

1. A fan motor, comprising:
a) a variable speed motor body; and b) a motor controller, the motor controller comprising: a microprocessor, an inverter circuit, a gear detection circuit, and a power supply; the gear detection circuit comprising a plurality of current sensing units;wherein
an output end of the power supply supplies power to each circuit, and an input end of the power supply is connected to an AC input; the gear detection circuit is connected to a plurality of power input lines; only one of the power input lines is selected to be in an energized state, and the other power input lines are selected to be in a deenergized state; each power input line is connected to one current sensing unit, respectively; an output end of the current sensing unit is connected to an input end of the microprocessor; the microprocessor selects operating parameters of the motor according to a detected signal of an energization state of each power input line and controls the motor to operate according to selected operating parameters; the microprocessor is connected to a series communication unit; and the microprocessor communicates with an external device via the series communication unit.