发明名称 |
PROCESS FOR SWITCHING BETWEEN MAINS SUPPLY AND A FREQUENCY INVERTER AND VICE VERSA FOR AN ESCALATOR DRIVE |
摘要 |
A method of controlling the drive of conveyor installation comprising a the drive motor (26) and a frequency converter (42) whose output is adjustable, between a load operation and an idle mode, in the form of an escalator (10) or a moving sidewalk, where: in the load operation mode the drive motor (26) is supplied with a line voltage at an essentially constant line frequency (f>Netz<), and in the idle mode with an output voltage of the frequency converter (42); the line voltage and the frequency converter's output voltage are compared with respect to frequency and phase position; the frequency converter (42) is set for an output frequency which has a predetermined spacing ( DELTA f>up<, DELTA f>down<) from the line frequency (f>Netz<);a demand to switch modes is signalled by a conveyance signal generator (48);and at the point in time (t>1<, t>4<), after a demand to switch modes has been signalled, when the output frequency of the converter (42) has reached the predetermined frequency spacing ( DELTA f>up<, DELTA f>down<) from the line frequency (f>Netz<), and a predetermined phase spacing has been achieved between the frequency converter's output voltage and the line frequency (f>Netz<), a switch-over signal (58) is emitted to switch the drive motor (26) between the frequency converter supply and the line supply.
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申请公布号 |
WO0144083(A8) |
申请公布日期 |
2001.10.04 |
申请号 |
WO2000US33744 |
申请日期 |
2000.12.13 |
申请人 |
OTIS ELEVATOR COMPANY;HENKEL, REINHARD;SPANNHAKE, STEFAN;STRIPLING, RALPH;MARKUS, RICHARD |
发明人 |
HENKEL, REINHARD;SPANNHAKE, STEFAN;STRIPLING, RALPH;MARKUS, RICHARD |
分类号 |
B66B25/00;H02J3/00;H02P27/06;(IPC1-7):B65G15/00 |
主分类号 |
B66B25/00 |
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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