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Aerospace
SENER SUM Stepper Motors
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SENER stepper motors are known for an unparalleled correlation between CAD model and final product.
The SUM stepper family of motors is currently being integrated into the rotary actuator product line that will be deployed in flights on the Next Generation Platform (known as Neosat), as well as the Euclid, Exomars and Juice scientific European Space Agency (ESA) missions.
The SUM motor design process ensures a high degree of consistency between the FEM model and the manufactured units.
This means shorter turnaround times by minimizing the number of repetitions needed to obtain a motor that matches specifications.
The stepper motor portfolio caters for diameters ranging from 38 to 150mm, in 2-phase and 4-phase designs. The number of turns per phase, distance between rotor and stator, etc., which are design parameters used by SENER’s engineers in the course of their work, may be seen in the attached table.
Capabilities
All design activities, including those for the SUM electric motors, are done by SENER engineers, aided by the most modern CAD/CAE tools in the market.
Excluding the manufacture of basic parts, all AIT activities are carried out by SENER’s personnel at its own installations.
Design
SUM motors are currently manufactured in diameters ranging from 38 to 150 mm, in 2-phase and 4-phase designs. These parameters are non-restrictive and different designs may be configured upon request.
Technical data:
| Unit | SUM-38-120 | SUM-38-200 | SUM-150-1800 | SUM-55-360 | SUM-88-160 | SUM-88-360 | SUM-88-800 | |
| Rotor size | mm | 38 | 38 | 150 | 55 | 88 | 88 | 88 |
| Steps | 120 | 200 | 1800 | 360 | 160 | 360 | 800 | |
| Mass | gr. | 130 | 130 | 915 | 230 | 400 | 400 | 400 |
| Running torque | Nm | 0.15 | 0.08 | 15 | 0.3 | 0.55 | 0.6 | 0.3 |
| Detent torque | mNm | 25 | 5 | 2000 | 45 | 145 | 80-150 | 80 |
| Resistance | Ohm | 80 | 80 | 28 | 38 | 65 | 80-100 | TBC |
| Technology maturity | TRL6 | TRL3 | TRL3 | Space qualified | TRL8 | TRL8 | TRL4 | |
| Temperature range | ºC | -45/+95 | -45/+95 | -45/+95 | -45/+95 | -45/+95 | -45/+95 | -45/+95 |
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