发明名称 |
CONTROLLER FOR ELECTROMAGNETIC EXCITER USING POWER LINE SUBHARMONIC |
摘要 |
A synchronized subharmonic controller for a dual coil electromagnetic vibrator, which derives both power and timing from a single phase AC line, having a trigger circuit which operates the coils at one-third the power line frequency. A timing circuit is optically coupled to alternately fire a pair of oppositely-directed SCR's with each SCR connecting one of the coils across the AC line. The optical coupling reduces feedback from the coil circuitry to the timing circuit. A pair of capacitors supply additional power to operate the coils and to reduce the peak values of current supplied by the power line. |
申请公布号 |
ZA8408707(B) |
申请公布日期 |
1985.06.26 |
申请号 |
ZA19840008707 |
申请日期 |
1984.11.07 |
申请人 |
FMC CORPORATION |
发明人 |
JOHN D. GOTAL;JUNIUS D. SCOTT |
分类号 |
H02K33/12;B06B1/04;G05D19/02;G05F1/45;H02K33/00 |
主分类号 |
H02K33/12 |
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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