发明名称 |
Control system for vacuum pump |
摘要 |
A vacuum pump has an alternating current motor, a rotary shaft and a gas transferring body. The alternating current motor runs at a certain speed based on frequency of alternating current and is sufficiently supplied with the alternating current. Gas is transferred from a certain space by the gas transferring body driven by the alternating current motor through the rotary shaft. A method for controlling a vacuum pump includes keeping a rotational speed of the alternating current motor at a second predetermined rotational speed, detecting a value of the alternating current to the alternating current motor, keeping the rotational speed at a first predetermined rotational speed that is higher than the second predetermined rotational speed when the detected alternating current value exceeds a first predetermined value, and keeping the rotational speed at the second predetermined rotational speed when the detected alternating current value becomes equal to a second predetermined value. <IMAGE> |
申请公布号 |
EP1314890(A3) |
申请公布日期 |
2003.08.20 |
申请号 |
EP20020025927 |
申请日期 |
2002.11.20 |
申请人 |
KABUSHIKI KAISHA TOYOTA JIDOSHOKKI |
发明人 |
YAMAMOTO, SHINYA;KAWAGUCHI, MASAHIRO;UCHIYAMA, OSAMU |
分类号 |
F04B49/06;F04C18/12;F04C28/02;F04C28/08 |
主分类号 |
F04B49/06 |
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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