发明名称 |
Controlling torsional shaft oscillation |
摘要 |
Torsional oscillation of a shaft in a swing drive system of an excavator is minimized by monitoring torsional strain of the shaft. An electric motor provides torque to the shaft in response to a drive signal provided by a converter. A compensation circuit produces a compensation signal as a function of torsional strain of the shaft. A field excitation circuit or regulator powers a converter as a function of the compensation signal such that a counter torque is provided to the shaft and torsional oscillation of the shaft is reduced. |
申请公布号 |
ZA200801788(B) |
申请公布日期 |
2009.07.29 |
申请号 |
ZA20080001788 |
申请日期 |
2008.02.25 |
申请人 |
PEABODY ENERGY CORPORATION |
发明人 |
SHACKELFORD, JAMES LUTHER |
分类号 |
G05B;H02P |
主分类号 |
G05B |
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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