| 摘要 |
PURPOSE:To eliminate the wear of a brush by employing a system for starting via Hall IC with two leads led from a winding. CONSTITUTION:A rotor 4 tends to rotate in a direction of an arrow with a repelling force against the coil. A Hall IC1 detects S-pole become OFF to turn OFF a current distributing transistor Tr3. Thus, a current ic from a power source Vc does not flow, and an amplifying transistor Tr4a becomes ON. A current switching transistor Tr3b becomes ON, a current ic flowed through the emitter of a transistor Tr3b in H direction, thereby inverting the starting coil 2, and a rotor 4 receives a repelling force to rotate in a direction of an arrow. According to the structure, a contactless brushless motor can be performed without brush. Therefore, powder due to wear of the brush does not contaminate the interior of a motor, thereby preventing an improper insulation. |
