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型号: HOGS 15
类别: HOGS 15
描述: Digital drive technology needs speed and position sensors
which detect even minimum motion (crawling speed) with high
accuracy􀀀and no time lag. This problem is solved with Sinewave
Encoders which have two signals displaced by 90°
(sine / cosine) from which the information necessary for a quasi
continuous control characteristic can be evaluated. The precision
of the result depends significantly on the accuracy of the
sinewave signals.
Standard Sinewave Encoders with signals approaching a true
sinewave have harmonics up to the 10th order superimposed
on the sinewave signals. In particular the 2nd and 3rd harmonic
is prominent (see left FFT oscillogram).
HÜBNER has set a new standard in Sinus Encoders (Sinus
Tachos) with the LowHarmonics® technology which produces
negligible harmonic content in the sinewave signals. The basis
of the patented method is an opto electronic scanning technology
which almost totally suppresses the harmonics by interference
(see right FFT oscillogram).
For AC motors with permanent magnet excitation this Sinewave
Encoder is equipped with an additional􀀀commutation
track (twelve sine / cosine signals per turn, for others consult
factory). The absolute information is transmitted via own leads.
The absolute information can be switched by a MUX and
transmitted via the signal leads as an option to start the motor.
Sinewave Encoders with small hollow shaft in LowHarmonics®
technology are also available. We will be pleased to advise you.
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