Stepper Motors

A stepper motor is used as an output in electronic circuits. The motor is a brushless DC electric motor that divides a full rotation into a number of equal steps.

The motor’s position can then be made to move and hold at one of these steps without any position sensor for feedback as long as the motor is carefully sized to the application in respect to torque and speed.

Multiple coils are organised in phases (groups). By energising each phase in sequence the motor will rotate, one step at a time.

Why and when to use a Stepper Motor?

With a computer controlled stepping you can achieve very precise positioning and/or speed control.
•Steppers move in precise repeatable steps, they are perfect to use where precise positioning is needed such as 3D printers, CNC and camera platforms.


•Some disk drives use stepper motors to position the read/write head.


•Precise increments of movement also allow for excellent control of rotational speed for process automation and robotics.


•A Stepper motor has maximum torque at low speeds, so they are a good choice for applications where low speed with high precision is needed.



Stepper motor types
•Bipolar drivers use H bridge circuitry to reverse the current flow through the phases. By energising the phases with alternating the polarity all the coils can be put to work turning the motor.


•Permanent magnet motors use a permanent magnet in the rotor. They operate based on the principle that minimum reluctance occurs with minimum gap, meaning the rotor points are attracted towards the stator magnet poles.


•Unipolar drivers always energise the groups in the same way. The common lead will always be negative. They can be implemented with simple transistor circuitry.



Advantages of step motors
•Low cost


•High reliability


•High torque at low speed


•Full torque at standstill

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Omschrijving Prijs Step Angle Holding Torque Number Of Wires Voltage Rating Frame Size Stepper Motor Type Shaft Diameter Current Rating Winding Arrangement Shaft Length Depth Number of Pole Pairs Resistance Per Phase Detent Torque
RS-stocknr. 351-4603
FabrikantnummerP542-M481U-G01L82
65,19 €
Each
Aantal stuks
7.5° 0.20Nm 6 5 V dc - Permanent Magnet 4mm 550 mA Unipolar 17.2mm 25mm 2 9.1Ω -
RS-stocknr. 878-7733
FabrikantnummerSM2862-5251
FabrikantSanyo Denki
226,72 €
Each
Aantal stuks
1.8° 6.4Nm 4 100 V ac 85.5 x 85.5mm Single Shaft 14mm 6 A Bipolar 28.5mm 98mm - 0.36Ω -
RS-stocknr. 877-7222
FabrikantnummerSTM17S-3AN
315,82 €
Each
Aantal stuks
1.8° 0.48Nm 8 12 → 48 V dc 17mm Dual Hybridge 5mm 2 A - 22mm 81mm - - -
RS-stocknr. 829-3516
Fabrikantnummer103H7126-0740
FabrikantSanyo Denki
72,70 €
Each
Aantal stuks
1.8° 1.27Nm 6 24 V dc 56 x 56mm Hybrid 6.35mm 3 A Unipolar 19.1mm 77.3mm - 0.9Ω -
RS-stocknr. 829-3512
Fabrikantnummer103H7123-5740
FabrikantSanyo Denki
58,10 €
Each
Aantal stuks
1.8° 1.0Nm 4 24 V dc 56 x 56mm Hybrid 6.35mm 2 A Bipolar 19.1mm 53.8mm - - -
RS-stocknr. 877-7234
FabrikantnummerSTM23S-2AN
577,27 €
Each
Aantal stuks
1.8° 0.88Nm 8 12 → 70 V dc 23mm Dual Hybridge 6.35mm 5 A - 18.4mm 92.4mm - - -
RS-stocknr. 877-7247
FabrikantnummerSTM23IP-2EE
686,44 €
Each
Aantal stuks
1.8° 0.88Nm 8 12 → 70 V dc 42mm Dual Hybridge 6.35mm 5 A - 18.4mm 92.4mm - - -
RS-stocknr. 878-7711
Fabrikantnummer103H8223-6340
FabrikantSanyo Denki
284,11 €
Each
Aantal stuks
1.8° 7.44Nm 4 100 V ac 85.85 x 85.85mm Single Shaft 12mm 6 A Bipolar 28.48mm 127.42mm - 0.45Ω -
RS-stocknr. 779-3740
FabrikantnummerFMJ7301CH
15,84 €
Each
Aantal stuks
5.625 °, 11.25 ° 40mNm 5 12 V - Bipolar, Unipolar 3mm 32 mA Unipolar 6mm 19mm - - -
RS-stocknr. 921-1347
FabrikantnummerAM0820-V3-18-08 C06.072A 08/1 256:1
FabrikantFaulhaber
497,49 €
Each
Aantal stuks
18° 0.65mNm 4 3 V dc - Bipolar, Unipolar 2.34mm 150 mA Bipolar 3.85mm 16.75mm 2 18Ω 0.17mNm
RS-stocknr. 351-4574
FabrikantnummerM82201-P2SB
26,54 €
Each
Aantal stuks
7.5° 25mNm - 12 V dc - Permanent Magnet 2mm 180 mA Unipolar - - 2 - -
RS-stocknr. 878-7720
FabrikantnummerSM2862-5151
FabrikantSanyo Denki
226,72 €
Each
Aantal stuks
1.8° 6.4Nm 4 100 V ac 85.5 x 85.5mm Single Shaft 14mm 4 A Bipolar 28.5mm 98mm - 0.83Ω -
RS-stocknr. 829-3531
FabrikantnummerSH2141-5511
FabrikantSanyo Denki
104,33 €
Each
Aantal stuks
1.8° 6.5mNm 4 24 V dc 14 x 14mm Hybrid 4mm 300 mA Bipolar 13.5mm 31.5mm - 21Ω -
RS-stocknr. 199-863
Fabrikantnummer82950004
FabrikantCrouzet
36,96 €
Each
Aantal stuks
15° 15mNm 6 13.3 V dc - Permanent Magnet 2mm 190 mA Unipolar 8.8mm 21.7mm 2 115Ω -
RS-stocknr. 829-3528
Fabrikantnummer4835710-1
FabrikantSanyo Denki
2,94 €
Each
Aantal stuks
1.8° - 6 - - Bipolar, Unipolar - - Unipolar - - - - -
RS-stocknr. 181-6693
FabrikantnummerEMMS-ST-87-S-SEB-G2
FabrikantFesto
644,26 €
Each
Aantal stuks
1.8° - - 48 V dc - Hybrid 11mm 9.5 A - 27mm 125.6mm - 0.1Ω -
RS-stocknr. 181-6694
FabrikantnummerEMMS-ST-87-M-S-G2
FabrikantFesto
238,39 €
Each
Aantal stuks
1.8° - - 48 V dc - Hybrid 11mm 9.5 A - 27mm 114.9mm - 0.23Ω -
RS-stocknr. 368-0277
Fabrikantnummer26M048B-1U
24,12 €
Each
Aantal stuks
7.5° 9.0mNm 6 5 V dc - Permanent Magnet 2mm 250 mA Unipolar 9.78mm 13.72mm 2 19.6Ω -
RS-stocknr. 122-4621
FabrikantnummerADM1220S-2R-V3-83 + M2X0.2X15 + 2.8000.08.353
FabrikantFaulhaber
576,16 €
Each
Aantal stuks
18° 2.4mNm - 3 V - Disc Magnet 1.5mm 220 mA Bipolar 3.85mm 0mm 10 10.4Ω -
RS-stocknr. 878-7657
FabrikantnummerSH3533-12U40
FabrikantSanyo Denki
99,12 €
Each
Aantal stuks
1.8° 0.12Nm 6 24 V dc 35 x 35mm Single Shaft 5mm 1.2 A Unipolar 18mm 35mm - 2.4Ω -
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