发明名称 |
Speed control for asynchronous motor in crane - has two of three phases each controlled by series triac. or thyristors in antiparallel |
摘要 |
<p>The speed control has two triacs (4,5) controlling two of the motor's three phases. The triacs are controlled by one of the three phases. Each triac may be replaced by two antiparallel thyristors. The motor (1) starts and stops smoothly. The control is simple and is intended especially for motors used in cranes. Two of the motor's windings are each connected via a triac to the input of a rectifier bridge (6). The bridge's dc output is connected via a resistor network to one of the windings and via a diac (7) to the gates of both triacs. The resistor network contains a variable resistor (12) for controlling the speed of the motor.</p> |
申请公布号 |
DE3009445(A1) |
申请公布日期 |
1981.09.17 |
申请号 |
DE19803009445 |
申请日期 |
1980.03.12 |
申请人 |
PEKAZETT BAUMASCHINEN GMBH |
发明人 |
BERTSCHE,HELMUT |
分类号 |
H02P27/02;(IPC1-7):02P5/40 |
主分类号 |
H02P27/02 |
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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