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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Description Price 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庫存編號 136-6716
製造零件編號103H7126-1740
HK$605.86
單位
1.8° 1.65Nm - - 56 x 56mm - 6.35mm 4 A Bipolar 19mm 56mm - 0.5Ω -
RS庫存編號 878-7761
製造零件編號103H5208-5210
HK$387.02
單位
1.8° 0.39Nm 4 24 V dc 42 x 42mm Bipolar, Unipolar 5mm 1 A Bipolar 22.5mm 40.5mm - 4.1Ω -
RS庫存編號 136-6702
製造零件編號2H4238B17R220
HK$666.04
單位
1.8° 0.39Nm 4 36 V dc 42 x 42mm Bipolar 5mm 1.7 A Bipolar 24mm 42mm - 1.3Ω -
RS庫存編號 829-3496
製造零件編號103H5205-0440
HK$295.88
單位
1.8° 0.20Nm 6 24 V dc 42 x 42mm Hybrid 5mm 1.2 A Unipolar 22.5mm 34.5mm - 2.24Ω -
RS庫存編號 183-3581
製造零件編號SF2422-10B41
HK$379.06
單位
1.8° 0.43Nm 4 24 V dc 42 x 42mm Hybrid 5mm 1 A Bipolar 24mm 33mm - 3.6Ω -
RS庫存編號 440-464
BrandRS PRO
HK$813.91
單位
1.8° 1.2Nm 8 3 V dc 82.6 x 82.6mm Hybrid 9.5mm 2 A Unipolar 121.4mm 62.5mm - 1.5Ω -
RS庫存編號 829-3500
製造零件編號103H5210-5240
HK$254.09
單位
1.8° 0.51Nm 4 24 V dc 42 x 42mm Hybrid 5mm 1 A Bipolar 22.5mm 49.5mm - 4.8Ω -
RS庫存編號 878-7764
製造零件編號103H7123-0410
HK$568.68
單位
1.8° 0.83Nm 6 24 V dc 56 x 56mm Bipolar, Unipolar 6.35mm 2 A Unipolar 19.1mm 55.3mm - 1.6Ω -
RS庫存編號 878-7702
製造零件編號103H8222-6340
HK$1,423.68
單位
1.8° 5.1Nm 4 100 V ac 85.85 x 85.85mm Single Shaft 12mm 6 A Bipolar 28.48mm 93.73mm - 0.35Ω -
RS庫存編號 440-307
製造零件編號82940003
BrandCrouzet
HK$548.67
單位
7.5° 0.24Nm 6 12.7 V dc - Permanent Magnet 6mm 50 mA Unipolar 13mm 43mm 2 26.7Ω -
RS庫存編號 136-6703
製造零件編號2H4248U12R220
HK$756.19
單位
1.8° 0.37Nm 6 36 V 42 x 42mm Unipolar 5mm 1.2 A Unipolar 24mm 42mm - 3.3Ω -
RS庫存編號 892-8741
BrandRS PRO
HK$1,692.20
單位
1.8° 2.2Nm 8 4.17 V, 6 V, 8.4 V 60 x 60mm Hybrid, Permanent Magnet 7.5mm 2 A Parallel, Series, Unipolar 22.4mm 110mm 1 -
RS庫存編號 180-5290
BrandRS PRO
HK$940.92
單位
1.8° 2.3 (Unipolar) nm, 2.8 (Parallel) nm, 2.8 (Series) nm 8 2.54 V, 3.64 V, 5 V 82.5 x 82.5mm Hybrid 9.52mm 1.96 (Series) A, 2.8 (Unipolar) A, 3.92 (Parallel) A Parallel, Series, Unipolar 28.9mm 67mm - 0.65 (Parallel) , 1.3 (Unipolar) , 2.6 (Series) -
RS庫存編號 180-5291
BrandRS PRO
HK$1,151.04
單位
1.8° 3.8 (Unipolar) nm, 4.8 (Parallel) nm, 4.8 (Series) nm 8 2.54 V, 4.76 V, 6.6 V 82.5 x 82.5mm Hybrid 9.52mm 1.96 (Series) A, 2.8 (Unipolar) A, 3.92 (Parallel) A Parallel, Series, Unipolar 28.9mm 94mm - 0.85 (Parallel) , 1.7 (Unipolar) , 3.4 (Series) -
RS庫存編號 892-9167
製造零件編號P310-158-005.10
BrandPortescap
HK$1,855.00
單位
14mNm 8 - - Disc Magnet - 720 mA Bipolar - - 1 - 2.5mNm
RS庫存編號 136-6706
製造零件編號2H4238B17S340
HK$938.76
單位
1.8° 0.39Nm 4 36 V dc 42 x 42mm Bipolar 5mm 1.7 A Bipolar 24mm 42mm - 1.3Ω -
RS庫存編號 892-9325
製造零件編號35M048B2B
BrandPortescap
HK$374.66
單位
7.5° 19.8mNm - - - Bipolar, Unipolar 2mm 170 mA - - 29.84mm - - -
RS庫存編號 181-6696
製造零件編號EMMS-ST-87-M-SB-G2
BrandFesto
HK$4,784.71
單位
1.8° - - 48 V dc - Hybrid 11mm 9.5 A - 27mm 164.9mm - 0.23Ω -
RS庫存編號 181-6692
製造零件編號EMMS-ST-87-S-SB-G2
BrandFesto
HK$4,662.01
單位
1.8° - - 48 V dc - Hybrid 11mm 9.5 A - 27mm 132.6mm - 0.1Ω -
RS庫存編號 122-4621
製造零件編號ADM1220S-2R-V3-83 + M2X0.2X15 + 2.8000.08.353
BrandFaulhaber
HK$4,201.91
單位
18° 2.4mNm - 3 V - Disc Magnet 1.5mm 220 mA Bipolar 3.85mm 0mm 10 10.4Ω -