Page 76 - CNC Robotics

Chapter 2 / Electronics

APPLICATION NOTE

Tabl e 1: Comparative advantages of chopp ing modes
Chopp ing Mode Ripp le Current Motor Dissipation Bridge Dissipation • Minimum Current
ENABLE HIGH HIGH HIGH LOWER
ONE PHASE l OW lOW l OVVEST lOW
TWO PHASE HIGH lOW l OW Ippl2
n As related to L2:l8N, l 6203 or L6202.

Fig ure 6a: Two Phase Chopping.

lI-<:::\---{:lr:j-'" •..1.jJ.....;I-D~F.i '"'
JM1 t JIl1
l
"..'oll)---- - - - --==iF:=...- - - - - ...J 1Iltol-- - - - -==JF =-- - - - - ...J
1112. 11
110·1. ...,
"'"'
Figure6b: One Phase Chopping.

'1r-<j.-{i ,:,:::r '"' •..1tJ...Jf---D---1I~ '"'
Ii'll .l:! Ii'll
11l1_1I!------==iF=------...J llt'loM!-- - --'=F=----- --'
IIU . \. JII2. 11
EM. II [11.11

Figure 6c: EnableChopping.

[II ~:rJ)---t>-6
Ell

'1r-<j.--{i,:,:::r '" •.LjJ..Jf---D~Ii1 '"
JI't1 ~ l il t
!-----..E.:::f=------l IM1-lt)---- - ----==F=-- --- - -'
I H2· 1I
EII.L

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