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Products | Induction Motors

High Frequency (400 Hz) AC Induction Motors

for high performance applications (INM Series)

The INM Series of high frequency AC induction motors is intended for aircraft applications utilizing 400 Hz power sources. Design features include both high efficiencies and high power densities to conserve weight. They are designed in accord with military standards, making them suitable for use on both commercial and military aircraft. INM motors provide a solution wherever there is a need for an induction motor to be powered from a 400 Hz power source. In addition, these induction AC motors also include custom features as requested by respective manufacturers.

MTI has a wealth of knowledge and experience designing AC Induction Motors in systems where DC was not available or where "off-the-shelf" AC motors would not fit the requirements. We highly recommend that you contact our engineering staff for any unusual application or requirements. MTI has designed many of these types of induction AC motors for use in the following systems:

Fields of Application
  • Actuation systems
  • Optical sight systems
  • Environmental control valves
  • Flight data instruments
  • Fire control and fuse applications
  • Fuel control valves
Unique Features
  • High power density and efficiency
  • Flexibility of designs to suit custom needs
  • Contactorless detent torque magnet assemblies are optional, with little or no change in length
  • Multiphase design and run capabilities
  • Special housing configurations available as option
  • High Temperature operation capability; utilizing 220 ° C magnet wire as standard

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Induction Motors

Size Parameters

Categories

ModelNumber Length Motor Outside Diameter Stator Outside Diameter Number of Phases Rated Speed Power at Rated Speed D2L Peak Stall Torque Motor Constant (Stall) Motor Constant (max. torque)
Size 17, 4 pole
INM-17-4A1-00 2.025 1.672 1.371 1.000 7200.000 0.014 1.645 2.700 0.386 0.405
INM-17-5A1-00 2.250 1.672 1.371 1.000 7200.000 0.023 2.068 3.800 0.496 0.560
INM-17-6A1-00 2.525 1.672 1.371 1.000 7200.000 0.060 2.585 12.900 0.882 0.882
INM-17-7A1-00 2.750 1.672 1.371 1.000 7200.000 0.091 3.008 16.500 1.060 1.145
Size 18, 4 pole
INM-18-3A3-00 2.123 1.800 1.575 3.000 10800.000 0.240 2.082 37.000 1.320 1.650
INM-18-5A3-00 2.341 1.800 1.575 3.000 10800.000 0.330 2.623 50.000 1.560 1.960
INM-18-6A3-00 2.616 1.800 1.575 3.000 10900.000 0.420 3.304 68.000 1.850 2.320
INM-18-7A3-00 2.963 1.800 1.575 3.000 11100.000 0.569 4.165 105.000 2.360 2.910
INM-18-8A3-00 3.400 1.800 1.575 3.000 10750.000 0.868 5.206 133.000 2.720 3.370
Size 19, 4 pole
INM-19-2A3-00 2.039 1.864 1.714 3.000 9600.000 0.068 1.763 11.500 0.894 0.894
INM-19-3A3-00 2.189 1.864 1.714 3.000 9840.000 0.095 2.203 15.400 1.040 1.090
INM-19-4A3-00 2.389 1.864 1.714 3.000 9700.000 0.129 2.791 20.600 1.220 1.280
INM-19-5A3-00 2.639 1.864 1.714 3.000 9380.000 0.186 3.525 26.000 1.440 1.520
Size 20, 4 pole
INM-20-2A1-00 2.276 2.000 1.850 1.000 9000.000 0.010 1.882 5.000 0.603 0.603
INM-20-3A1-00 2.526 2.000 1.850 1.000 9600.000 0.023 2.738 6.800 0.743 0.921
INM-20-5A1-00 2.900 2.000 1.850 1.000 9000.000 0.032 4.018 7.100 0.737 0.871
INM-20-7A1-00 3.276 2.000 1.850 1.000 9000.000 0.044 5.305 7.100 0.783 0.918
Size 26, 4 pole
INM-26-3A3-00 2.170 2.600 2.350 3.000 9970.000 0.327 3.860 57.000 1.910 2.000
INM-26-5A3-00 2.670 2.600 2.350 3.000 10200.000 0.605 6.630 123.000 3.010 3.010
INM-26-7A3-00 3.170 2.600 2.350 3.000 10100.000 0.972 9.390 194.000 3.900 3.900
INM-26-9A3-00 3.870 2.600 2.350 3.000 10290.000 1.349 13.250 288.000 5.010 5.010
Size 33, 4 pole
INM-33-4A3-00 3.352 3.280 3.100 3.000 11550.000 0.744 9.000 38.000 1.220 3.010
INM-33-5A3-00 3.596 3.280 3.100 3.000 11550.000 0.996 11.350 55.000 1.530 3.530
INM-33-6A3-00 3.863 3.280 3.100 3.000 11600.000 1.219 14.300 84.000 1.960 4.090
INM-33-8A3-00 4.250 3.280 3.100 3.000 11450.000 1.987 18.020 126.000 2.470 4.900