8/12/2019 KOLLMORGEN Europe Product WIKI _ Motor Choke
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Page create# b$: %einhol# last
mo#i&ication: 'ues#a$ () o& pril*
(+,)+,:+:+0 b$ %einhol#
Motor Cho1e
2eneral3h$ use motor cho1es4
3h$ is the cross-section o& the motor cable important4
3hen is a motor cho1e re5uire#4
Current 6ollmorgen motor cho1es
2eneral2eneral in&ormation to cho1es can be &oun# on
page Cho1es.
3h$ use motor cho1es4'he motor cho1e
compensates high capaciti7e charge/#ischarge currents t$pical
o& shiel#e# motor cables
approx. ( m an# longerre#uces current alternation noise in the
motor
re#uces current ripple in the motor
ma1es it possible to use longer motor cables
re#uce# loa# on the ampli&ier output stages an#
recti&iers
re#uce# stress on the insulation o& the motor 8in#ings
For reasons o& electromagnetic compatibilit$* the motor must
be supplie# 8ith po8er 7ia a
shiel#e# cable. 'he structure o& a cable 8ith ,++9 shiel#ing
an# the capacit$ e5ui7alent circuit
#iagram to earth; are sho8n belo8.
'he #igital ser7o ampli&iers< high s8itching
&re5uencies an# steep s8itching e#ges gi7e rise to
the trans&er o& capaciti7e currents to the shiel# b$ the
three phases =* >* 3;. 'hese currents
&lo8 &rom the shiel# to earth. Depen#ing on the cable
length an# cable capacit$ #etermine# b$
#esign;* this can lea# to the generation o& shiel# currents
8ith pea1 7alues o& up to (+ .
'hese shiel# currents place a loa# on the ser7o ampli&iers
an# motor an#* on large s$stems*
lea# to shi&ts in potential 8hich can #amage other
components.
'his e&&ect is e7i#ent in particular on s$stems 8ith
multiple ampli&iers operating in parallel on
the same mains &ilter.
'he motor cho1es slo8 #o8n the rate o& r ise o& the
motor current re#uce e#ge steepness;*
thereb$ re#ucing the current trans&erre# to the shiel#.
'he core material o& the cho1e is magneti?e# 8ith s8itching
&re5uenc$ o& the ser7o ampli&ier.
'hat pro#uces losses in the cho1e* in the &orm o& heat*
so it #oes 8arm up.
3h$ is the cross-section o& the motor cable important4Motor
cables longer than + m 8ith a small cross-section e.g. x ,.+ mm@;
an# there&ore a
higher e5ui7alent resistance are able to re#uce the oscillation
ten#enc$ o& the LC% oscillating
circuit ampli&ier/cho1e/cable/motor;. 'his cross-section can
also be a#7antageous &or cable
lengths shorter than + m i& the cable capacit$ an# motor
in#uctance are 7er$ high. Ho8e7er*
the current carr$ing capacit$o& the cable must al8a$s be
8ithin the limits speci&ie# b$ EN
A+(+.
LMORGEN Europe Product WIKI : Motor Choke
http://www.wiki-kollmorgen.eu/wiki/tiki-index.php?page=Motor
8/21/2013
8/12/2019 KOLLMORGEN Europe Product WIKI _ Motor Choke
2/2
3hen is a motor cho1e re5uire#4
Amplifier Length Motor cable
B)++ ( ... + m
B++ ( ... + m
BA+,-A(+ ( ... ,++ m
B+,...( ( ... + m
6D ( ... + m
Current 6ollmorgen motor cho1esCE* =L* an# %oHB in&ormation
can be &oun# on page ppro7als.
Type Nominal
Current Inductance Frequency CE UL Usable for
ra!ing
"
"#L$%& (+ ,(+ H *) 1H? x xB)++* B++* BA+,...A(+*
B+,...,( 'tep
"#L$%( ( ,(+ H *) 1H? xB)++* B++* BA+,...A(+*
B+,...( 'tep
"#LN$&) A ++ H 1H? x x
B)++* B++* BA+,...A+A*
B+,...+A*
6D-x++)x...6D-x++Ax
'tep
"#LN$*& ,+ ++ H 1H? x x B)++* BA,+
"#LN$*( , ++ H 1H? x x BA,* B,(* 6D-x+,(x
"#LN$%& (+ + H 1H? x x BA(+
"#LN$%( ( + H 1H? x x B(* 6D-x+(x 'tep
"#LN$(+ in process
"#LN$,% in process
"#LN$-) in process
LMORGEN Europe Product WIKI : Motor Choke
http://www.wiki-kollmorgen.eu/wiki/tiki-index.php?page=Motor
8/21/2013
