Baumuller b maxx BM4400 - Information Regarding Maximum Speed

Technical Data
Instruction Handbook b maXX (BM4-F-)ENC-XX (Encoder module)
Document No.: 5.01042.12
21
of 102
3
3.3 Information regarding maximum speed
Maximum speed
incremental
encoder
The maximum possible encoder speed of an incremental encoder (sine-cosine) is calcu-
lated from the following formula:
Example:
Sine-cosine incremental encoder with 1024 inc.
The maximum possible encoder speed of an incremental encoder (rectangle) is calculat-
ed from the following formula:
The maximum speed depends on the used encoder, too.
Maximum speed
resolver
Limitation by excitation frequency at resolver:
Example:
Excitation frequency b maXX 4000: 4 kHz
theoretical maximum speed [rpm] n
max, theoretical
200 kHz
increments per revolution
-------------------------------------------------------------------
··
60⋅==
n
max, theoretical
200 kHz
1024
----------------------
60⋅ 11700 rpm==
theoretical maximum speed [rpm] n
max, theoretical
250 kHz
increments per revolution
-------------------------------------------------------------------
··
60⋅==
theoretical maximum speed [rpm] n
max, theoretical
excitation frequency
20
-----------------------------------------------------
60⋅==
n
max, theoretical
4 kHz
20
---------------
60⋅ 12000 rpm==
NOTE!
The maximum speed depends on the used encoder and its number of pole pairs, too.