Hybrid Stepper Motors
ANTI-CORROSION

Thanks to special technology, the protective coating on the inside and outside of the engines is treated in such a way that these MOONS’ engines are resistant to rust and corrosion.

This allows these products to be used in aircraft, ships, cars, antennas, solar equipment, etc.

Plus

  • Corrosion resistance
  • Rust resistance
  • NEMA sizes 17 – 23
  • The motors are highly customisable for every application requirement
  • Customisations available for wiring, shaft, winding, bearings, etc.

Electric motors used outdoors are susceptible to sometimes extreme temperatures and moisture accumulation. These factors cause internal corrosion, which can lead to component failure.
Traditionally, attempts were made to solve the problem by sealing the motor to prevent moisture from reaching internal components.
Unfortunately, it has been noted that shaft and terminal seals can only delay the onset of the phenomenon, but not stop the appearance of moisture in the engine. Furthermore, the presence of shaft seals causes a loss of 3 to 15 per cent of torque due to friction.

Today, a new approach is used to prevent corrosion and early failure by using a system of effective linings. MOONS’ new technology applies a protective coating to EVERY SURFACE AND STRUCTURE INSIDE AND OUTSIDE THE MOTOR; including the rotor, stator and housing. All surfaces that could potentially rust are therefore covered.

Stepper motors available with anti-corrosion treatment are NEMA 17 and NEMA 23

Parameter Unit Value
Phase 2
Step Angle 1.8°
Shaft Single
Frame Size NEMA17(42mm)
Length mm 39.3
Shaft diameter mm 5
Rated Current A 2
Holding Torque Nm 0.43
Holding Torque oz-in 60.9
Resistance Ohms ±10%@20℃ 1.04
Inductance mH Typ. 2.2
Coil Type Bi-Polar
Detent Torque mNm 15
Rotor Inertia gcm² 57
Steps/Revolution 200
Axial Shaft Load N 25N(Push) 65N(Pull)
Radial Shaft Load N 29N(At Flat Center)
Front Shaft Length mm 24
Front Shaft Diameter mm 5
Terminal Number 4
Connect Plug
Operating Temp. -20℃~50℃
Humidity 15%~85%
Insulation Class Class B (130℃)
Insulation Resistance 100 MΩ
Approvals UL,RoHS
IP Rating IP40
Weight kg 0.28
Weight g 280
Parameter Unit Value
Phase 2
Step Angle 1.8°
Shaft Single
Frame Size NEMA23(56.4mm)
Length mm 54.5
Shaft diameter mm 6.35
Rated Current A 1.5
Holding Torque Nm 1.25
Holding Torque oz-in 177.03
Resistance Ohms ±10%@20℃ 3.1
Inductance mH Typ. 12.5
Coil Type Bi-Polar
Detent Torque mNm 32
Rotor Inertia gcm² 215
Steps/Revolution 200
Axial Shaft Load N 40N(Push) 130N(Pull)
Radial Shaft Load N 70N(At Flat Center)
Front Shaft Length mm 20.6
Front Shaft Diameter mm 6.35
Terminal Number 4
Connect Plug
Operating Temp. -20℃~50℃
Humidity 15%~85%
Insulation Class Class B (130℃)
Insulation Resistance 100 MΩ
Approvals UL,RoHS
IP Rating IP40
Weight kg 0.6
Weight g 600

Are you interested in this solution for your project?

The experiment

An experiment was conducted to test MOONS’ engines with anti-corrosion coatings, and American Standard MIL-STD-202G salt spray was used.

The resistance of the new MOONS’ coatings was tested in an accelerated corrosion test with military standards.

Conventional engine

96 hours after the salt spray test, extensive corrosion can be seen, the rotor is blocked and the motor is no longer able to run.

MOONS’ anti-corrosion motor

A full 240 hours after exposure to salt spray, the motor is completely normal and runs smoothly.

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