LTN
LTN Servotechnik GmbH
Slip Ring Capsule SC 020-R
Slip ring SC020 + Resolver RE-15-1-B24
6, 12, 18 or 24 rings for max. 2 A each
2 rings combined for 4 A; 3 rings for 6 A
Outer diameter 20 mm
240 V DC / 240 V AC max.
L*
L*
L*
L*
= 15 mm
= 24 mm
= 33 mm
= 42 mm
at
at
at
at
6
12
18
24
rings
rings
rings
rings
Electrical Data
Number of rings:
Current:
Voltage:
High pot:
Insulation resistance:
Noise:
Contacts / Leads:
6, 12, 18 or 24
2 A max. per single ring; 4 A with 2 combined rings; 6 A with 3 rings
240 V DC / 240 V AC max.
500 V AC
1000 MOhm at 500 V DC
60 MOhm at 5 rpm, 6 V DC and 50 mA
Gold-gold / silver plated copper with teflon insulation
Mechanical Data
Speed:
Protection class:
Temperature:
Rotor connection:
Stator connection:
Bearings:
Housing:
Weight:
250 rpm max.
IP 40
-20 °C ... +80 °C (-5 °F ... +175 °F)
300 leads; AWG 26/19 (0,15 mm2)
300 / 500 / 1000 mm leads; AWG 26/19 (0,15 mm2); others on request
Miniature ball bearings of steel
with flange of POM; others on request
200 g max.
Subject to change without prior notice. Issued 03/2002
LTN
Slip Ring Capsule SC 020-R
LTN Servotechnik GmbH
Operating Principle: Slip Ring
Brush
Isolator
1
Ring
max.
2A
3
2
Rings Rings
max. max.
4A
6A
1x Brush
3x Brush
4 Contacts
per ring
8 Contacts
per ring
Brush
Isolator
Operating Principle Resolver
A resolver is a contact less rotary transformer that
provides information on the rotor position angle θ.
induces the voltages ES1-S3 and ES2-S4 into the two output
windings of the stator.
The stator bobbin winding is energized with an AC
voltage ER1-R2. This AC voltage is transferred to the rotor
winding with transformation ratio Tr. The AC voltage then
The magnitude of the output voltages vary with the sine
and the cosine of the rotor position angle θ, because the
two secondary windings are shifted by 90°.
Input:
ER1-R2
Output: ES1-S3
ES2-S4
Input Signal:
ER1-R2 = E0sin(ωt)
Output Signal:
E
S1-S3
= Tr ⋅ E
⋅ cosθ
R1-R2
Output Signal:
E
S2-S4
= Tr ⋅ E
⋅ sinθ
R1-R2
LTN
Slip Ring Capsule SC 020-R
LTN Servotechnik GmbH
Accuracy Resolver
The accuracy ε is defined as the difference between the
electrical angle θel, indicated by the output voltages of the
secondary windings, and the mechanical angle or rotor
position angle θmech.
The ‘accuracy absolute’ or the ‘accuracy spread’ is
caused by the internal error of the resolver and the
mounting error resulting in 1st and 2nd order harmonics
of the sinusoidal signal.
accuracy (ε) = electrical angle (θel ) – mechanical angle (θmech)
The ‘accuracy ripple’ has decisive influence on the
speed stability of a drive. This ripple is caused by 3rd
and higher order harmonics. LTN resolvers have an
accuracy ripple of less than 1’ which is achieved by a
patented procedure of stepping two lamination
assemblies in the rotor.
For each LTN resolver the accuracy is indicated in the
data sheet by the terms ‘accuracy absolute’, ‘accuracy
spread’ and ‘accuracy ripple’.
Straight lamination assembly:
Primary Side
R1 – R2
Pole Pairs
1
Transformation Ratio (±10%) 0.5
Stepped lamination assembly:
(LTN patent)
Input Voltage
7 Vrms
7 Vrms
Input Current
58 mA
36 mA
Input Frequency
5 kHz
10 kHz
Phase Shift (± 3°)
8°
–6°
Null Voltage
30 mV max.
Impedance
Zro
Zrs
Zso
Zss
75 j
70 j
180
170
98 Ω
85 Ω
j 230 Ω
j 200 Ω
110
96 j
245
216
j 159 Ω
150 Ω
j 400 Ω
j 370 Ω
D.C. Resistance (± 10°)
Electrical Data Resolver RE-15-1-B24R o t o r
Primary Side
R1 – R2
Transformation Ratio (± 10%) 0.5
Stator
40 Ω
102 Ω
Accuracy
±10’
Accuracy Ripple
1’ max.
17.5 Ω
200 Ω
Input Voltage
7 Vrms
7 Vrms
O p e r a t i n g Te m p e r a t u r e
–55°C ... +155°C
Input Current
58 mA
36 mA
Max. Permissible Speed
20,000 rpm
Input Frequency
5 kHz
10 kHz
Shock (11 ms)
≤ 10,000 m/s
Phase Shift (± 3°)
8°
–6°
Vibration (10 to 500 Hz)
≤ 500 m/s
Null Voltage
30 mV max.
Hi-pot Housing/Winding
500 V min.
Impedance
Zro
Zrs
Zso
Zss
Hi-pot Winding/Winding
250 V min.
75 j
70 j
180
170
Rotor
Completely impregnated
Stator
Completely impregnated
D.C. Resistance (± 10°)
Rotor
Stator
40 Ω
102 Ω
98 Ω
85 Ω
j 230 Ω
j 200 Ω
110
96 j
245
216
j 159 Ω
150 Ω
j 400 Ω
j 370 Ω
17.5 Ω
200 Ω
2
2
LTN
LTN Servotechnik GmbH
Primary Side
R1 – R2
Pole Pairs
1
Transformation Ratio (±10%) 0.5
Input Voltage
7 Vrms
7 Vrms
Input Current
58 mA
36 mA
Input Frequency
5 kHz
10 kHz
Phase Shift (± 3°)
8°
–6°
Null Voltage
30 mV max.
Impedance
Zro
Zrs
Zso
Zss
75 j
70 j
180
170
98 Ω
85 Ω
j 230 Ω
j 200 Ω
110
96 j
245
216
j 159 Ω
150 Ω
j 400 Ω
j 370 Ω
D.C. Resistance (± 10°)
40 Ω
102 Ω
Rotor
Stator
Primary Side
R1 – R2
Accuracy Absolute
Pole Pairs
17.5 Ω
200 Ω
±10’, on request
1
6’
Transformation
Ratio (±10%)
Accuracy
Ripple 0.5
1’ max.
Input Voltage
7 rVarms
O p e r a t i n g Te m p e
ture
7 Vrms
–55°C
... +155°C
I n p u t C u r rM
en
t . P e r m i s s i b l e58SmA
ax
peed
36 mA
20,000
rpm
Input Frequency
Shock (11 ms)
10 kHzm/s
≤ 10,000
5 kHz
–6°m/s2
≤ 500
Phase ShiftVibration
(± 3°) (10 to 500
8° Hz)
Null Voltage
30 mV max.
Impedance
Rotor Moment of Inertia
Zro
Zrs
Zso
Zss
2
0.02 × 10–4 kgm2
75 j 98 Ω 500110
j 159 Ω
Hi-pot Housing/Winding
V min.
70 j 85 Ω
96 j 150 Ω
Hi-pot Winding/Winding
250 V min.
180 j 230 Ω 245 j 400 Ω
Rotor
impregnated
170 j 200 ΩCompletely
216 j 370
Ω
Stator(± 10°)
D.C. Resistance
Completely impregnated
Rotor
Stator
40 Ω
102 Ω
17.5 Ω
200 Ω
Accuracy Absolute
±10’, on request
Accuracy Ripple
1’ max.
O p e r a t i n g Te m p e r a t u r e
–55°C ... +155°C
Max. Permissible Speed
20,000 rpm
Shock (11 ms)
≤ 10,000 m/s
Vibration (10 to 500 Hz)
≤ 500 m/s
Rotor Moment of Inertia
0.02 × 10–4 kgm2
Hi-pot Housing/Winding
500 V min.
Hi-pot Winding/Winding
250 V min.
Rotor
Completely impregnated
Stator
Completely impregnated
2
2
LTN
Slip Ring Capsule SC 020-R
LTN Servotechnik GmbH
Order Information
Type of slip ring:
No. of rings with:
S C 0 2 0
Standard: 6 / 12 / 18 / 24
max. 2 A
max. 4 A
max. 6 A
Standard: 300 mm
Standard: 300 mm
Length of leads in mm: Rotor
Stator
Resolver RE-15-1-B24
LTN Servotechnik GmbH
Georg-Hardt-Straße 4
D-83624 Otterfing
Germany
Tel:
+49 - 08024 - 60 80 - 0
Fax: +49 - 08024 - 60 80 - 100
E-Mail: LTN@LTN.de
Internet: www.LTN.de
Subject to change without prior notice. Issued 03/2002
R 0 1
Stator of resolver rotating with
rotor of slip ring