Patent ID: 6972535

Claim:
A controller for a motor, the motor comprising a first terminal and a second terminal, wherein in a positive mode, the first terminal is connected with the positive electrode of a power supply, and the second terminal is connected with the negative electrode of the power supply, wherein in a negative mode, the first terminal is connected with the negative electrode, and the second terminal is connected with the positive electrode, the controller comprising: a central conductive device comprising a first conductor connected with the positive electrode of the power supply, a second conductor connected with the first terminal, a third conductor connected with the negative electrode of the power supply and a fourth conductor connected with the second terminal; an upper conductive device comprising a fifth conductor for contacting the first and second conductors of the central conductive device and a sixth conductor for contacting the third and fourth conductors of the central conductive device in the positive mode; a lower conductive device comprising a seventh conductor for contacting the first and fourth conductors of the central conductive device and a eighth conductor for contacting the second and third conductors of the central conductive device in the negative mode; an upper magnetic device for attracting the upper and lower conductive devices to the negative mode; and a lower magnetic device for attracting the upper and lower conductive devices to the positive mode.