Вношу дополнение, использую LspCAD Ингемара Джонасона (лицензионный),
Xmax - в его моделях peak to peak (от пика до пика).
Фрагмент описания:
DRIVER UNIT EDITOR
Edit driver unit parameters. You can create you own loudspeaker
parameter files which are used by LspCAD. The parameter files use
.unt as default extension, but nothing keeps you from using another
extension.
Below follows a description of the various menu picks.
* File | New
Erase all information.
* File | Open...
Load a parameter file.
* File | Save, File | Save as...
Save a parameter file.
* File | Print data...
Print the loudspeaker parameters.
* File | Copy data
Copy the loudspeaker parameters to windows clipboard.
* File | User note...
Here you may enter your own comments, up to 600 characters or
9 rows of information may be entered.
* Calc. missing fields.
Calculate the fileds that are missing if possible, this menu-pick is grayed if Crosscalc. is checked.
In the dialog window you can set a number of loudspeaker parameters.
* Manufacturer Manufacturers name.
* Model Model name of the loudspeaker unit.
* Type Enter the range that the loudspeaker unit works within.
For the moment there is no practical use of this.
* Re Voice coil resistance [W].
* Le Voice coil inductance [mH].
* Reb Voice coil resistance (see info below) [W].
* Leb Voice coil inductance (see info below) [mH].
* fs Resonance frequency in free air [Hz].
* Qms Mechanical Q-value
* Qes Electrical Q-value
* Qts Total Q-value
* Rms The loss resistance of the suspension [Ns/m].
* Mmd Moving mass excluding surrounding air [g].
* Mms Moving mass including surrounding air [g].
* Cms The mechanical compliance of the suspension [m/N].
* Cas The acoustic compliance of the suspension [m^5/N].
* Vas Equivalent volume [l].
* Sd Cone area [cm^2].
* Bl Force factor [N/A]
* Pmax The maximum, thermal limited input power [W].
* Xmax The maximum linear excursion, NOTE peak to peak value [mmp-p].
* Airgap height Airgap Height of the magnet [mm].
* Voicecoil height The voice coil winding height [mm].
* Efficiency Shows the efficiency of the loudspeaker unit with 1W/8Ohm
and 1m distance.
* Crosscalc. When this checkbox is checked the program will always
try to force the parameters to coincide with each other.
* Double voice coil Check this checkbox if the loudspeaker unit
has double voice coils.
The loudspeaker parameters that are used by LspCAD are
Sd, Cms, Mmd, Rms, Re, Le, Pmax and Xmax.
Make sure therefore that these parameters are correct.
Improved voice coil inductance model (Reb/Leb)
The simple way to model the voice coil inductance is an inductor (Le) in series with the
voice coil DC resistance (Re). This model not very useful for highpower long stroke subwoofers
where the voice coil inductance is high at low frequencies and substantially lower and high
frequencies. For this purpose an extended model is implemented where the voice coil inductance
is modeled by Le as before plus a resistor (Reb) and an inductor (Leb) in parallel.
Reb and Leb can be left unused if wanded, just set Reb and Leb = 0 (Undef.), this is default.
Конец цитаты.
Если пользоваться другим софтом, то требуется уточнение трактовки.
Где найти Peerless Standard for Acoustic Measurements (PSAM), на него много ссылок, а текста так не нашёл?
Сергей Фролов, 75ГДН - отличный вуфер, но для своего времени, против Peerless-ов он не "бьётся".
Основные причины:
термостойкость медной звуковой катушки (БФ-4), давление возуха под колпачком (посапывает),
магнитная цепь менее насыщенная, нет КЗ колец - КНИ выше, нет вентиляции под центрирующей шайбой... Xmax - 8мм (I.J. NOTE)
Судя по всем признакам он "содран" с одного из старых Пирлесов.
P.S.
При использовании LspCAD-а ОБЯЗАТЕЛЬНО включайте опции дополнительного анализа (перегрев, нелинейность, потери в ФИ), иначе достоверно до 1..3 вольт RMS. Моделировать лучше на рабочей мощности. По умолчании TKR TKL катушки моделируются для МЕДИ.
Xmax - в его моделях peak to peak (от пика до пика).
Фрагмент описания:
DRIVER UNIT EDITOR
Edit driver unit parameters. You can create you own loudspeaker
parameter files which are used by LspCAD. The parameter files use
.unt as default extension, but nothing keeps you from using another
extension.
Below follows a description of the various menu picks.
* File | New
Erase all information.
* File | Open...
Load a parameter file.
* File | Save, File | Save as...
Save a parameter file.
* File | Print data...
Print the loudspeaker parameters.
* File | Copy data
Copy the loudspeaker parameters to windows clipboard.
* File | User note...
Here you may enter your own comments, up to 600 characters or
9 rows of information may be entered.
* Calc. missing fields.
Calculate the fileds that are missing if possible, this menu-pick is grayed if Crosscalc. is checked.
In the dialog window you can set a number of loudspeaker parameters.
* Manufacturer Manufacturers name.
* Model Model name of the loudspeaker unit.
* Type Enter the range that the loudspeaker unit works within.
For the moment there is no practical use of this.
* Re Voice coil resistance [W].
* Le Voice coil inductance [mH].
* Reb Voice coil resistance (see info below) [W].
* Leb Voice coil inductance (see info below) [mH].
* fs Resonance frequency in free air [Hz].
* Qms Mechanical Q-value
* Qes Electrical Q-value
* Qts Total Q-value
* Rms The loss resistance of the suspension [Ns/m].
* Mmd Moving mass excluding surrounding air [g].
* Mms Moving mass including surrounding air [g].
* Cms The mechanical compliance of the suspension [m/N].
* Cas The acoustic compliance of the suspension [m^5/N].
* Vas Equivalent volume [l].
* Sd Cone area [cm^2].
* Bl Force factor [N/A]
* Pmax The maximum, thermal limited input power [W].
* Xmax The maximum linear excursion, NOTE peak to peak value [mmp-p].
* Airgap height Airgap Height of the magnet [mm].
* Voicecoil height The voice coil winding height [mm].
* Efficiency Shows the efficiency of the loudspeaker unit with 1W/8Ohm
and 1m distance.
* Crosscalc. When this checkbox is checked the program will always
try to force the parameters to coincide with each other.
* Double voice coil Check this checkbox if the loudspeaker unit
has double voice coils.
The loudspeaker parameters that are used by LspCAD are
Sd, Cms, Mmd, Rms, Re, Le, Pmax and Xmax.
Make sure therefore that these parameters are correct.
Improved voice coil inductance model (Reb/Leb)
The simple way to model the voice coil inductance is an inductor (Le) in series with the
voice coil DC resistance (Re). This model not very useful for highpower long stroke subwoofers
where the voice coil inductance is high at low frequencies and substantially lower and high
frequencies. For this purpose an extended model is implemented where the voice coil inductance
is modeled by Le as before plus a resistor (Reb) and an inductor (Leb) in parallel.
Reb and Leb can be left unused if wanded, just set Reb and Leb = 0 (Undef.), this is default.
Конец цитаты.
Если пользоваться другим софтом, то требуется уточнение трактовки.
Где найти Peerless Standard for Acoustic Measurements (PSAM), на него много ссылок, а текста так не нашёл?
Сергей Фролов, 75ГДН - отличный вуфер, но для своего времени, против Peerless-ов он не "бьётся".
Основные причины:
термостойкость медной звуковой катушки (БФ-4), давление возуха под колпачком (посапывает),
магнитная цепь менее насыщенная, нет КЗ колец - КНИ выше, нет вентиляции под центрирующей шайбой... Xmax - 8мм (I.J. NOTE)
Судя по всем признакам он "содран" с одного из старых Пирлесов.
P.S.
При использовании LspCAD-а ОБЯЗАТЕЛЬНО включайте опции дополнительного анализа (перегрев, нелинейность, потери в ФИ), иначе достоверно до 1..3 вольт RMS. Моделировать лучше на рабочей мощности. По умолчании TKR TKL катушки моделируются для МЕДИ.
