| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a parallel driving circuit for DC brushless motor which can accelerate it to specified velocity in a short time after input of an operation command. <P>SOLUTION: This parallel driving circuit makes a switching signal, using the rotor position detection signal of each motor, so as to drive a plurality of DC brushless motors connected in parallel at th same velocity with a single driving circuit. It is equipped with a signal selecting circuit 40 which switches these signals between each motor and the next during a priod when the rotor position detection signal does not change and also outputs a control signal so as to make a switching signal, using the rotor position detection signal after switching, a sopeed setting circuit 50 which generates the speed set value to each motor 10A and 10B, according to an operation command, and a speed control circuit 60 which outputs a control signal, according to the speed set value, and accelerates each motor to specified velocity. It is further equipped with a permanent magnet 13 which positions rotors 12 in roughly the same positions by attracting the magnetic poles of the rotors 12 of the motors 10A and 10B during stoppage. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
