发明名称 |
INJECTION MOLDING MACHINE |
摘要 |
In an injection molding machine whose movable part is driven by an AC servo motor (4), d-phase current in a direction of magnetic flux produced by a field system and q-phase current orthogonal to the d-phase current are obtained through d-q conversion on the basis of drive current of the AC servo motor (4) and a phase of a rotor. Control of current is made in DC mode on condition that the d-phase current is set to zero, and the q-phase current is adapted for a current command. Control of current in the DC mode as described above is designed to advance the phase of the q-phase current command, which is an effective component of a current command at the time of the occurrence of magnetic saturation, thereby preventing, the influence of magnetic saturation to lessen the fall of torque. <IMAGE> |
申请公布号 |
EP0911959(A4) |
申请公布日期 |
2002.03.20 |
申请号 |
EP19980914124 |
申请日期 |
1998.04.21 |
申请人 |
FANUC LTD |
发明人 |
NEKO, NORIAKI;MATSUBARA, SHUNSUKE;IWASHITA, YASUSUKE;KAWAMURA, HIROYUKI |
分类号 |
B22D17/26;B22D17/20;B22D17/32;B29C45/47;B29C45/64;B29C45/76;H02P21/00;H02P27/04 |
主分类号 |
B22D17/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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