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Torque Chart for Stepper Motor U11




Calculated torque speed curves for various voltages here
Example with 36 volt below


Series connectionParallel connection
Speed
(RPS)		Torque
(oz-in)		Speed
(RPS)		Torque
(oz-in)
13.313.4
2323.2
3333.1
4343
52.853
62.763
72.773
82.783
92.692.8
102.3102.7
112.1112.6
121.9122.6
131.9132.6
141.7142.5
151.7152.4
161.7162.4
171.6172.4
181.6182.4
191.4192.2
201.3202.1

Series Inductance (Mh) DCR (Ohm)
Phase A Series Connected 14.6 22.1
Phase B Series Connected 14.6 22.1
Holding torque single phase energized at 0.5A DC = 4 oz.in. **
°C rise - Motor center mounted to 3.5" diameter. x 0.676" thick alum heat sink, with thermal compound between motor and heat sink. Motor and heat sink in still air at 20° C ambient. The heat sink was sitting on a wooden bench, so that one face of 3.5" diameter was insulated. With a single phase energized with 0.5 amps of current, for 1 hour, in still air, the motor temperature rise was 55° C.
Under similar conditions, with the motor laying on its side, without benefit of the heat sink, using 0.5 amps of current into a single phase the motor temperature rise above ambient was 80° C. *

Parallel Inductance (Mh) DCR (Ohm)
Phase A Parallel Connected 3.8 5.3
Phase B Parallel Connected 3.8 5.3
Holding torque single phase energized at 0.85A DC = 4 oz.in. **
°C. rise - Motor center mounted to 3.5" diameter. x 0.676" thick alum heat sink, with thermal compound between motor and heat sink. Motor and heat sink in still air at 20° C ambient. The heat sink was sitting on a wooden bench, so that one face of 3.5" diameter was insulated. With a single phase energized with 0.85 amps of current, for 1 hour, in still air, the motor temperature rise was 45° C.
Under similar conditions, with the motor laying on its side, without benefit of the heat sink, using 0.85 amps of current into a single phase the motor temperature rise above ambient was 72° C. *

** If total temperature of C rise, plus ambient, is elevated beyond 125 C, it will be necessary to reduce input current. Or improve heat sinks.
* In a vacuum it is assumed unit will be mounted to a heatsink that will conduct heat out of the chamber. The values shown will approximate the expected °C. rise in a vacuum when mounted to the external heatsink and the total temperature, °C rise and ambient should not exceed 125° C.
Calculated torque speed curves for various voltages here