| 摘要 |
In an electric motor with brake having a holding brake function, a brake resistor (23) is equipped with three resistors (1, 2, 3). In a normal time, one end sides of the respective three resistors (1, 2, 3) are commonly connected to each other and the other end sides thereof are also commonly connected to each other, and the three resistors (1, 2, 3) are connected in parallel with a brake DC power supply (24). In an emergency time or an emergency stop, the one end sides of the respective three resistors (1, 2, 3) are commonly connected to each other to form a Y-connection, and the other ends that are not commonly connected are electrically connected to the output ends of a stator coil (27) of an electric motor (22) or to ends having the same potentials as those of said output ends. |
