| 摘要 |
<p>PURPOSE: A control unit of a motor for an injection molding machine is provided to achieve the control unit for controlling drive motors having a large maximum output by the use of circuits for the control unit for controlling drive motors having a small maximum output. CONSTITUTION: First and second three-phase inverters(52,53) having self-diagnosing circuits are connected to three-phase windings of a three-phase double-winding type motor(51), respectively, and first and second servo controllers(54,55) having self-diagnosing circuits are connected to the three-phase inverters(52,53), respectively. When an abnormality occurs in the three-phase inverter(52) or the servo controller(54), the occurrence of the abnormality is signaled to the servo controller(55). When abnormality occurs in the three-phase inverter(53) or the servo controller(55), the occurrence of the abnormality is signaled to the servo controller(54), thereby stopping rotation of the motor.</p> |
