| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a low power consumption type electromagnetic brake or electromagnetic clutch which carries out an effective releasing operation of the brake or the clutch flowing no waste current to an exciting coil in the releasing time of the brake or the clutch, at the electromagnetic brake side or the electromagnetic clutch side, in a nonexciting operation type electromagnetic brake or electromagnetic clutch. SOLUTION: Two sorts of exciting coils 2a and 2b of a nonexciting operation type electromagnetic brake are provided and connected in series, and one side of them is made in an exciting oil for instant suction 2a to which a large current can be carried in a short time, while the other side is made in an exciting coil for holding 2b to which a small current is carried in order to hold for a long time after the suction, and the two sorts of exciting coils 2a and 2b are used differently by connecting an electronic switch 3-1 to both terminals of the exciting coil 2b in parallel, and turned on and off. As a result, a power consumption with a waste current is eliminated, and a switch circuit 3 including the electronic switch 3-1 can be assembled even in an electromagnetic brake body.</p> |
