Patent ID: 6933688

Claim:
A brushless direct current motor drive circuit comprising: a first serially connected motor coil energizing circuit; a second serially connected motor coil energizing circuit; a first serially connected feedback circuit; a pre-drive circuit; a position sensor; and a duty ratio controller; wherein said first serially connected motor coil energizing circuit further comprises: a direct current power supply; a first diode; a first switching means; a motor coil having a first end and a second end; a second switching means; and a ground; wherein said first switching means is connected to said first end of said motor coil, and said second switching means is connected to said second end of said motor coil; wherein said first serially connected feedback circuit further comprises: a second diode; a capacitor; and said ground; wherein said first serially connected feedback circuit connects said second end of said motor coil to said ground through said capacitor; wherein said capacitor is also connected to said power supply; wherein said second serially connected motor coil energizing circuit further comprises: said direct current power supply; a third diode; a third switching means; said motor coil; a fourth switching means; and said around; wherein said third switching means is connected to said first end of said motor coil, and said fourth switching means is connected to said second end of said motor coil; wherein said second serially connected feedback circuit further comprises: a fourth diode; said capacitor; and said ground; wherein said second serially connected feedback circuit connects said first end of said motor coil to said ground through said capacitor; wherein said pre-drive circuit receives inputs from said position sensor and said duty ratio controller; and wherein said pre-drive circuit turns said first switching means, second switching means, third switching means and fourth switching means on and off; wherein said first serially connected feedback circuit further comprises a first zener diode and said second serially connected feedback circuit further comprises a second zener diode, said first zener diode and second zener diode being configured to reduce heat by causing a current from said power source to be absorbed by said capacitor.