Reversible AC Synchronous Motors
The 9904 111 series reversible ac synchronous motors provide fixed speed
operation and are ideally suited to a wide range of control & instrumentation
applications. The units low speed, either 250 or 500 rpm, ensure low mechanical
noise and smooth operation when used with additional gearing in low speed
drives.
The motors may be specified with a wide range of factory fitted gearheads where
increased torque and reduced operating speed is required. Gearheads for the 35
& 51 mm options provide a choice of standard ratios with output speed options
from 1 rev/second down to 1 rev/hour. while the high torque 56 mm model may
be fitted with gearheads providing speeds down to 30 revs/hour.
Reversible ac synchronous motor dimensions
L7 L1 L2 ∅ D4
L5
T1
∅ D2
∅ D1 T2
L4
∅ D3
L6 L8 L3
T1
Form 1 Form 1A Form 1B Form 1C
motor type form dimensions mm
9904-111- D1 D2 D3 D4 L1 L2 L3 L4 L5 L6 L7 L8 T1 T2
32 series 1 A 35 2 10 3.2 21.5 8.8 50 42 1.2 0.8 2.2 175 N/A N/A
31- x11 1 A 51 1.8 10 3.5 25 8.2 70.5 60.2 1.5 1.0 3 175 N/A N/A
31- x01 1 A 51 3 10 3.5 25 8.2 70.5 60.2 1.5 1.0 3 175 N/A N/A
31- x14 1 B 51 1.8 10 3.5 25 8.2 70.5 60.2 1.5 1.0 3N/A 38.5 18.3
31- x04 1 B 51 3 10 3.5 25 8.2 70.5 60.2 1.5 1.0 3N/A 38.5 18.3
35 series 1 C 56.3 3 12 4.4 33.5 8.2 76.5 66 1.5 1.5 3.8 N/A 37.1 20
36 series 1 C 56.3 3 12 4.4 33.5 8.2 76.5 66 1.5 1.5 3.8 N/A 37.1 20
Reversible AC Synchronous Motor Performance
Supply Voltage
coils connected in Working Torque
coils connected in Phasing Capacitor
coils connected in Massmotor type
Parallel
Vac Series
Vac
Speed
@50Hz
rpm Parallel
Ncm Series
Ncm
Current
m A Parallel
µFSeries
µFgrams
9904 111 32 311 110 220 8 0.1 0.22
9904 111 32 511 48 24 250 0.4 0.7 35 2.2 4.7 80
9904 111 31 111
9904 111 31 104 220 16 0.1
9904 111 31 311
9904 111 31 304 110 30 0.39
9904 111 31 511
9904 111 31 504 24
250 2.0
150 8
160
9904 111 35 104 220 15 0.12
9904 111 35 504 24 250 3.3 140 10 300
9904 111 36 104 220 30 0.22
9904 111 36 504 24 500 3.3 280 18 300
note** The above motors are rated for continuous operation. except the 36 series which is rated for a 50% duty cycle
The 250 rpm motors may be used on a 60Hz supply to provide 300 rpm using different phasing capacitors
The motors are either provided with leads ( Form 1 A ) or solder terminals ( Forms 1B & 1C) as shown below:
Mclennan
Servo Supplies Ltd.
Tel: +44 (0)8707 700 700 www.mclennan.co.uk
AC Synchronous Motor General Specification
Units 32 series 31xx 1 series 31xx 4 series 35 series 36 series
Input Power:
Coils in parallel
Coils in series Watts 0.8
1.7 3.5 3.5 6
Permissible voltage tolerance %-15 / +10 -15 / +10 -15 / +10
Maximum recommended load inertia Kgcm² 0.005 0.02 0.09 0.05
Maximum Radial force on shaft N2.5 5.0 10
Maximum Axial force on shaft N0.75 1.5 1.5
Insulation according to CEE10 class 1 class 2 class 1 class 1
Insulation test voltage V1500 2500 1500 1500
Ambient temperature range
operating
storage Deg. C -20 to +60
-40 to + 100 -20 to +70
-40 to + 1000
bearings Sintered bronze
Housing Zinc plated
AC Synchronous Motor Connections for Operation on 50Hz Supplies:
Series connected coils
Grey Grey
Red Blue
CCW
CW
Capacitor
AC Synchronous Motor Connections: Parallel Connected Coils
motors with leads motors with solder terminals
Grey Grey
Red Blue
CW CCW
2’ 1’
2 1
CW CCW
The motors may also be operated on 60Hz supplies. If this is required please contact us for connection details
Geared AC Synchronous Motors
A wide range of gearheads providing reduced speed operation from1 rev/second to 1 rev per hour may be specified, factory
fitted to the ac synchronous motor range. For further details please see the section entitled ‘Geared synchronous motors’
Application notes
The direction of rotation of the ac synchronous motors can
be determined by simply connecting a capacitor and a switch
across the two windings as shown. The motors run at a fixed
speed synchronous with mains frequency, at any torque up
to the motor’s operating limit. They are therefore ideal for
high accuracy fixed speed drives.
The motors will accelerate to operating speed in typically
100 msecs. and will stop within typically 60 degrees once
power is removed, depending on the load inertia. They are
therefore suitable for positioning applications where the high
accuracy of a stepper motor, for example, is not required
If starting problems are experienced in applications featuring
low friction torque it is usually because the load inertia is too
high. In these cases a coupling with some compliance often
helps to overcome this problem. When a gearhead is used
for reduced speed operation the reflected load inertia at the
motor is reduced by the square of the gear ratio.
Mclennan
Servo Supplies Ltd.
Tel: +44 (0)8707 700 700 www.mclennan.co.uk
