发明名称 |
CONTROLLER OF AC ROTATING MACHINE |
摘要 |
<p>A controller for an AC rotary machine is proposed, by which a stable rotation angular-frequency estimate value can be obtained even in an extremely low speed region of the AC rotary machine, and consequently stable control can be performed. A controller for an AC rotary machine has an angular- frequency estimate output means (20) that outputs an angular-frequency estimate value Éi based on an angular-frequency calculated value (É1) including a rotation angular-frequency estimate value (Ée). The angular-frequency estimate output means (20) has lower-limit constant-value output means that outputs a lower-limit constant value (É2), comparison means that compares the angular-frequency calculated value É1 to the lower-limit constant value (É2), and switching means that performs switching operation according to the comparison means, wherein the switching means outputs the angular-frequency calculation value (É1) as the angular-frequency estimate value Éi when the angular-frequency calculation value (É1) is larger than the lower-limit constant value (É2), and outputs the lower-limit constant value (É2) as the angular-frequency estimate value Éi when the angular-frequency calculation value (É1) is equal to or less than the lower-limit constant value (É2).</p> |
申请公布号 |
EP2093878(A1) |
申请公布日期 |
2009.08.26 |
申请号 |
EP20060833610 |
申请日期 |
2006.11.29 |
申请人 |
MITSUBISHI ELECTRIC CORPORATION |
发明人 |
KONO, MASAKI;HATANAKA, KEITA;NEGORO, HIDETO |
分类号 |
H02P21/00;H02P21/04;H02P21/14 |
主分类号 |
H02P21/00 |
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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