AC MOTOR

摘要

An embodiment of the invention provides an AC motor that is driven by an AC voltage. The AC motor includes a motor coil, a switch circuit, a position detector and a controller. The motor coil receives the AC voltage to drive an axis of the motor. The switch circuit is coupled to the motor coil and controls a current passing through the motor coil. The position detector detects the position of a motor rotor to output a polarity signal. The controller controls the switch circuit according to the polarity signal and the AC voltage to make the current to be a first current with a first direction or a second current with a second direction.

主权项

1. An AC motor driven by an AC voltage, comprising:
a first motor coil and a second motor coil to receive the AC voltage; a switch circuit electrically connected to the first motor coil and the second motor coil to control a first current passing through the first motor coil or a second current passing through the second motor coil; a position detector, comprising a Hall element to detect a position of a rotor and outputting a polarity signal; a controller to receive the polarity signal from the position detector, and control the switch circuit to make the current be the first current with a first direction or the second current with a second direction according to the AC voltage and the polarity signal, wherein the first direction is opposite to the second direction; and an AC/DC transformer for converting the AC voltage into a DC voltage, and outputting the DC voltage to the controller and the position detector.