| 摘要 |
The invention relates to a device for generating a DC voltage proportional to the rotational speed and rotational direction of a brushless multiphase tachometer generator. For this purpose, the phase voltages (e) are differentiated and used as control voltages (e') for switches (S) by means of which alternating voltages (e + 30) derived from the phase voltages (e) are switched through to the output. <IMAGE>
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