| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electromagnetic brake device, which is capable of greatly reducing load of maintenance operation with inspection and replacing parts, and capable of making operation speed of the brake high-speed, even when applied to a winder of a large sized crane or others and a power supply circuit for a brake. <P>SOLUTION: In the power supply circuit for a brake, an AC power supply is connected to a brake coil L11 via a voltage control circuit section 30 and a rapid magnetism reducing circuit 40. A thyristor SCR constituting the voltage control circuit section 30 is arranged between a terminal NA to which one end side of the AC power supply AC is connected and a terminal NC to which one end side of the brake coil L11 is connected. A diode D11 and the rapid magnetism reducing circuit 40 are arranged in series between a terminal NB to which the other end side of the Ac power supply AC is connected and the terminal NC. In the rapid magnetism reducing circuit 40, a shifting switch SW11 and a discharging resistance R11 are connected in parallel and in the shifting switch SW11, an IGBT and an FWD are connected in back-to-back connection. <P>COPYRIGHT: (C)2013,JPO&INPIT |
