BRAKE DRIVE CONTROLLING DEVICE FOR QUICKLY CHANGING STATE OF BRAKE FROM RELEASED STATE TO FASTENED STATE

摘要

PROBLEM TO BE SOLVED: To provide a brake drive controlling device capable of quickly changing a state of a brake from a released state to a fastened state.SOLUTION: A diode 23 has an anode connected to the other ends of brake coils 7a and 7a'. and a cathod connected to one end of a smoothing capacitor 3. A diode 24 has an anode connected to the other end of the smoothing capacitor 3 and a cathod connected to one ends of the brake coils 7a and 7a'. By providing the diodes 23 and 24, energy stored in the brake coils 7a and 7a' when at least one of an NPN transistor 21 and an NPN transistor 22 is in an on state is returned to the smoothing capacitor 3 when the NPN transistors 21 and 22 are in an off state.