Panasonic Minas-LIQI Series Technical Reference

Contents

№SR-ZSV00039 － 39 －Motor Business Unit, Appliances Company, Panasonic Corporation5－2－3 Notch FilterWhen the mechanical stiffness is low, resonance due to axis distortion, etc. may generate vibration or noise,in which case a high gain cannot be specified. In that case, specifying a higher gain or reducing vibra-tions is made possible by suppressing a resonance peak with the notch filter.1）Related parameterIt is possibility to adjust the frequency、width、depth,four related parameter can be used.Category No. Parameter Setup range Unit Function2 1 1st Notch frequency 505000 HzSpecifies the center frequency of the first notch filter.Specifying 5000 disables the notch filter.2 2 1st notch widthselection 020 - Specifies the frequency width of the first notch filter.2 3 1st notch depthselection 0-99 - Specifies the depth at the center frequency of the first notch filter.2 4 2nd notch frequency 505000 HzSpecifies the center frequency of the second notch filter.Specifying 5000 disables the notch filter.2 5 2nd notch widthselection 020 - Specifies the frequency width of the second notch filter.2 6 2nd notch depthselection 099 -Specifies the depth at the center frequency of the second notchfilter.2 7 3rd Notch frequency*1 505000 Hz Specifies the center frequency of the third notch filter.Specifying 5000 disables the notch filter.2 8 3rd notch widthselection *1 020 - Specifies the frequency width of the third notch filter.2 9 3rd notch depthselection *1 099 - Specifies the depth at the center frequency of the third notch filter.2 10 4th Notch frequency*1 505000 HzSpecifies the center frequency of the fourth notch filter.Specifying 5000 disables the notch filter.2 11 4th notch widthselection *1 020 - Specifies the frequency width of the fourth notch filter.2 12 4th notch depthselection *1 099 - Specifies the depth at the center frequency of the fourth notch filter.*1 When the adaptive filter function is used, the parameter value is automatically specified.2）UsageSpecify a resonance frequency on the basis of the frequency characteristics measurement function of thesetup support software, or operating waveform on the waveform graphic function, and specify a Notchfrequency for use.3）Notch width/depthA value on the left of the following table is specified for a width of Notch filter, which is a ratio of fre-quency band width in which damping factor becomes –3 [dB] against the Notch center frequency withdepth of “0.”The depth of a notch filter is an I/O ratio that provides the complete interruption of the center frequencyinput with a setting of 0 and complete passage with a setting of 100. In [dB], the values are as shownin the rightmost column of the table below on the right.