RO R O

R
RO
O
S
T
A
O L I D
S
R
Y
N
O T O R
R
E S O L V E R
T YPICAL A PPLICATIONS
Solid rotor, variable reluctance, frameless,
brushless resolvers for severe applications.
• Industrial tachometer
• High-speed spindles
Admotec’s RO Series Rotasyn variable reluctance
frameless resolvers provide high performance in
measurement and feedback applications where
traditional resolvers fail. Perfect for aerospace, downhole, nuclear, and other severe applications, these solidrotor resolvers offer original equipment manufacturers
reliable solutions at any quantity—from prototype units
all the way up to high-volume production.
• Motor feedback
• AC and DC servo motors
• Angle measurement
• Flight control systems
• Aerospace
• Hydraulic pumps
• Downhole (oilwell)
• Nuclear environments
Non-contact design
No wear or aging
The Rotasyn has fewer parts and a solid rotor without
windings, making it much simpler than traditional
brushless resolvers. Since the solid rotor has no coils and
the stator has only half the number of windings of a
traditional brushless resolver, reliability is significantly
increased. And the solid rotor allows operation with the
rotor immersed in hydraulic oil or other liquids.
Rugged construction
Tolerates vibration and shock
Solid rotor
Higher speed, lower inertia
Lower impedance
Better noise immunity
Fewer coils
Higher reliability
Functionally equivalent to
traditional brushless
resolvers
Higher performance
replacement for obsolete or
unavailable devices
The Rotasyn resolver is mechanically and electrically
compatible with traditional brushless resolvers and can
replace them as original equipment or in existing
applications. And if our standard products don’t meet
your needs, custom versions can be quickly designed for
your application.
Absolute over 360°
No homing at power up
Admotec—motion and position sensing
for original equipment manufacturers.
admotec
Advanced Motion Technology
F EATURES & B ENEFITS
G ENERAL S PECIFICATIONS
Operating Temperature
ROxxxx-M
–40 to +130
ROxxxx-K
–60 to +230
Shock
20
Vibration
10
Radial Air Gap
0.3
Excitation Frequency
5 to 50
10
Excitation Amplitude
2 to 12
Transformation Ratio
0.50
Accuracy
±60
Insulation Resistance
100
Dielectric Strength (Hipot)
Winding to Winding 250
Winding to Housing 500
Lead Wire Size
26
Lead Length
300
°C
°C
G
G (10–500 Hz, 0.5 Hr)
mm nominal
kHz typical
kHz recommended
Vrms typical
nominal
arc-minutes
Megohm minimum
Vdc
Vdc
AWG
mm
R
08
O
S
RO2010 S PECIFICATIONS
Mass (Weight)
Maximum Speed
RO2010-x-R Models
RO2010-x-V Models
Rotor Moment of Inertia
RO2010-x-R Models
RO2010-x-V Models
Primary DC Resistance
Secondary DC Resistance
30
grams
100
200
kRPM
kRPM
1
2
10
23
gram•cm2
gram•cm2
Ω nominal
Ω␣ nominal
A
S
E R I E S
Y
N
R O 2 0 1 0
RO2010 I MPEDANCES
1000
Impedance (Ω)
Series RO2010 is a frameless size 8 solid-rotor resolver
with a 20mm stator OD and a 10mm airgap diameter. It
fits shafts up to 4mm in diameter.
T
Zpo (Ω)
Zps (Ω)
Zso (Ω)
Zss (Ω)
100
10
1
10
100
Excitation Frequency (kHz)
RO2010 P HASE S HIFT
60°
50°
RO2010 OUTLINE & MOUNTING DIMENSIONS*
18(+/-0.05)
Phase Shift
40°
30°
20°
10°
0°
-10°
-30°
1
4H7
10
20 (+0/-0.05)
-20°
10
100
Excitation Frequency (kHz)
RO2010 T RANSFORMATION R ATIO
1.0
RO2010 I NPUT C URRENT
AND
P OWER
10000
Transformation Ratio
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
4Vrms Excitation
0.0
1
Current (mA)
1000
10
100
Excitation Frequency (kHz)
Power (mW)
RO2010 O RDERING I NFORMATION
100
RO2010 - ■ - ■ ■ ■ ■
10
Stator Construction
M = Standard
1
1
10
Excitation Frequency (kHz)
admotec
Advanced Motion Technology
100
K = Hi Temp/Hi Rad
(Kapton insulation)
Custom constructions
available
Rotor Bore (mm)
004 = 4mm (Standard)
Smaller bores available.
Rotor Construction
R = Standard
V = Hi Speed
* All dimensions in mm.
R
O
15
T
A
S
S
Y
E R I E S
N
RO3620
RO3620 I MPEDANCES
Series RO3620 is a frameless size 15 solid-rotor resolver
with a 36mm stator OD and a 20mm airgap diameter. It
fits shafts up to 10mm in diameter.
Impedance (Ω )
RO3620 S PECIFICATIONS
Mass (Weight)
Maximum Speed
RO3620-x-R Models
RO3620-x-V Models
Rotor Moment of Inertia
RO3620-x-R Models
RO3620-x-V Models
Primary DC Resistance
Secondary DC Resistance
85
grams
50
150
kRPM
kRPM
20
40
10
25
10000
Zpo (Ω)
Zps (Ω)
Zso (Ω)
Zss (Ω)
1000
100
10
1
gram•cm
gram•cm2
Ω nominal
Ω␣ nominal
2
10
100
Excitation Frequency (kHz)
RO3620 P HASE S HIFT
50°
40°
RO3620 OUTLINE & MOUNTING DIMENSIONS*
2.5
Ø 10.00 +0.01
-0
ISO H7
3.0
0.02 A
(When mounted)
A
Phase Shift
30°
20°
10°
0°
-10°
-20°
-30°
-40°
10
100
Excitation Frequency (kHz)
34.0
36.83 +0
-0.03
1
RO3620 T RANSFORMATION R ATIO
1.0
18.0
20.0
RO3620 I NPUT C URRENT
AND
P OWER
Transformation Ratio
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
1000
Current (mA)
0.0
Power (mW)
1
100
10
100
Excitation Frequency (kHz)
4Vrms Excitation
RO3620 O RDERING I NFORMATION
RO3620 - ■ - ■ ■ ■ ■
10
1
1
10
Excitation Frequency (kHz)
admotec
Advanced Motion Technology
100
Stator Construction
M = Standard
K = Hi Temp/Hi Rad
(Kapton insulation)
Custom constructions
available
Rotor Bore (mm)
010 = 10mm (Standard)
Smaller bores available.
Rotor Construction
R = Standard
V = Hi Speed
* All dimensions in mm.
R
21
O
S
T
A
E R I E S
S
Y
N
R O 5 0 3 2
RO5032 I MPEDANCES
Series RO5032 is a frameless size 21 solid-rotor resolver
with a 50mm stator OD and a 32mm airgap diameter. It
fits shafts up to 20mm diameter.
Impedance (Ω )
10000
Zpo (Ω)
Zps (Ω)
Zso (Ω)
Zss (Ω)
1000
100
RO5032 S PECIFICATIONS
190
grams
10
1
40
65
140
200
22
34
kRPM
kRPM
RO5032 OUTLINE & MOUNTING DIMENSIONS*
2.5
Ø 20.00 +0.02
-0
3.0
100
Excitation Frequency (kHz)
gram•cm2
gram•cm2
Ω nominal
Ω␣ nominal
ISO H7
A
10
RO5032 P HASE S HIFT
0.03 A
50°
40°
30°
Phase Shift
Mass (Weight)
Maximum Speed
RO5032-x-R Models
RO5032-x-V Models
Rotor Moment of Inertia
RO5032-x-R Models
RO5032-x-V Models
Primary DC Resistance
Secondary DC Resistance
20°
10°
0°
-10°
-20°
-30°
-40°
(When mounted)
1
10
100
Excitation Frequency (kHz)
1.0
47.0
0.9
Transformation Ratio
+0
50.0 -0.1
RO5032 T RANSFORMATION R ATIO
20.0
RO5032 I NPUT C URRENT
AND
P OWER
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
1
1000
Current (mA)
Power (mW)
100
RO5032 O RDERING I NFORMATION
4Vrms Excitation
100
10
Excitation Frequency (kHz)
RO5032 - ■ - ■ ■ ■ ■
10
Stator Construction
M = Standard
K = Hi Temp/Hi Rad
(Kapton insulation)
1
1
10
Excitation Frequency (kHz)
admotec
Advanced Motion Technology
100
Custom constructions
available
Rotor Bore (mm)
020 = 20mm (Standard)
Smaller bores available.
Rotor Construction
R = Standard
V = Hi Speed
* All dimensions in mm.
R
30
O
S
T
E
A
R
I
S
E
Y
S
N
R O 7 5 5 7
RO7557 I MPEDANCES
Series RO7557 is a frameless size 30 solid-rotor resolver
with a 75mm stator OD and a 57mm airgap diameter. It
fits shafts up to 45mm in diameter.
Impedance (Ω)
10000
Zpo (Ω)
Zps (Ω)
Zso (Ω)
Zss (Ω)
1000
100
RO7557 S PECIFICATIONS
300
grams
20
35
kRPM
kRPM
1.1
1.8
28
40
kg•cm2
kg•cm2
Ω nominal
Ω␣ nominal
3.0
10
100
Excitation Frequency (kHz)
+0.03
Ø 45.00 -0
ISO H7
2.5
1
RO7557 P HASE S HIFT
RO7557 OUTLINE & MOUNTING DIMENSIONS*
A
10
Phase Shift
Mass (Weight)
Maximum Speed
RO7557-x-R Models
RO7557-x-V Models
Rotor Moment of Inertia
RO7557-x-R Models
RO7557-x-V Models
Primary DC Resistance
Secondary DC Resistance
60°
50°
40°
30°
20°
10°
0°
-10°
-20°
-30°
-40°
-50°
0.02 A
(When mounted)
1
10
100
Excitation Frequency (kHz)
1.0
72.0
0.9
Transformation Ratio
+0
75.00 -0.05
RO7557 T RANSFORMATION R ATIO
22.0
RO7557 I NPUT C URRENT
AND
P OWER
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
1000
1
4Vrms Excitation
10
100
Excitation Frequency (kHz)
Current (mA)
Power (mW)
100
RO7557 O RDERING I NFORMATION
RO7557 - ■ - ■ ■ ■ ■
10
Stator Construction
M = Standard
K = Hi Temp/Hi Rad
(Kapton insulation)
1
1
10
Excitation Frequency (kHz)
admotec
Advanced Motion Technology
100
Custom constructions
available
Rotor Bore (mm)
045 = 45mm (Standard)
Smaller bores available.
Rotor Construction
R = Standard
V = Hi Speed
* All dimensions in mm.
R
RO
O T A S Y N
S
P RINCIPLE
OF
O PERATION
R
O L I D
O T O R
R
E S O L V E R
T YPICAL A PPLICATION
Unlike traditional brushless resolvers, the Rotasyn has
both primary and secondary windings in the stator and
thus no transformer is required—the Rotasyn is
intrinsically brushless! The transferred energy remains
magnetic from the primary coil through the airgap to the
sinusoidally shaped poles of the solid rotor.
Rotasyns can be used directly with all commercially
available Resolver-to-Digital (R/D) converters to provide
digital angle and speed information.
Rotasyn
Excitation
Oscillator
Ref
Primary
Secondary
Solid Rotor
Digital
Position
Data
The Rotasyn is similar to a rotary variable differential
rotary transformer (RVDT) in which the rotor acts as a
magnetic valve completing the flux path. The total flux
through the gap is constant—the rotor determines the
angular position within the stator bore where the
coupling occurs, and thus the relative amplitudes of the
output signals.
R/D
Converter
Sin
Cos
C USTOM R OTASYNS
In addition to the standard versions, Series RO Rotasyn
resolvers may be fully customized to your needs.
Available customization options include (but are not
limited to) those shown below. Contact the factory with
your requirements for customized versions.
• Size 35, 40, 50, and 60 models
E LECTRICAL S CHEMATIC
R1 (Red/White)
• Customized housings for different stator mounting
S1 (Red)
θ
Secondary
(Cosine)
Primary
R2 (Yellow/White)
S3 (Black)
S2 (Yellow)
Secondary
(Sine)
• Larger airgap (up to 1mm)
• Flooded rotor to eliminate rotating seal
• Different windings for modified electrical characteristics
• Bifilar winding for electrical redundancy
• Duplex units for complete redundancy
S4 (Blue)
• Aerospace qualification testing
V(S1–S3) = V(R1–R2) x TR x cos(θ)
V(S2–S4) = V(R1–R2) x TR x sin(θ)
θ increases for CW rotation when viewed from lead exit end
admotec
Advanced Motion Technology
Admotec Inc.
85 Mechanic Street
Lebanon NH 03766-1500 USA
www.admotec.com
Tel +1 603.448.7000
Fax +1 603.448.7007
• Multispeed (multipole) design
• Complete enclosed units with bearings and shaft
Admotec Precision AG
Kartausstrasse 3
CH 8008 Zürich Switzerland
www.admotec.ch
Tel +41 44 422.2275
Fax +41 44 422.2276
The information contained in this document
is subject to change without notice and
should not be construed as a commitment
by Admotec Inc. Admotec assumes no responsibility for any errors which may appear.
© 2008 Admotec Inc.,
All rights reserved.
RO0808