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 829-3503
製造零件編號103H5208-5240
HK$222.47
單位
1.8° 0.39Nm 6 24 V dc 42 x 42mm Hybrid 5mm 1 A Bipolar 22.5mm 40.5mm - 4.1Ω -
RS庫存編號 535-0467
BrandRS PRO
HK$245.85
單位
1.8° 0.22Nm 4 2.8 V 42.3 x 42.3mm Hybrid, Permanent Magnet 5mm 1.33 A - 22mm 33mm - 2.1Ω -
RS庫存編號 829-3528
製造零件編號4835710-1
HK$22.47
單位
1.8° - 6 - - Bipolar, Unipolar - - Unipolar - - - - -
RS庫存編號 440-442
BrandRS PRO
HK$283.48
單位
1.8° 0.50Nm 8 5.1 V dc 56.4 x 56.4mm Hybrid 6.35mm 1 A Unipolar 91.1mm 50.5mm - -
RS庫存編號 892-8723
BrandRS PRO
HK$546.03
單位
1.8° 0.21Nm 4 9 V 39.2 x 39.2mm Hybrid, Permanent Magnet 5mm 600 mA - 22mm 58mm 1 15Ω -
RS庫存編號 455-2549
製造零件編號53467
HK$163.82
單位
7.5° 3mNm - 12 V dc 36mm Bipolar, Unipolar - - Unipolar - - 2 - -
RS庫存編號 878-7657
製造零件編號SH3533-12U40
HK$872.30
單位
1.8° 0.12Nm 6 24 V dc 35 x 35mm Single Shaft 5mm 1.2 A Unipolar 18mm 35mm - 2.4Ω -
RS庫存編號 878-7777
製造零件編號103H7123-5640
HK$561.70
單位
1.8° 1.0Nm 4 24 V dc 56 x 56mm Single Shaft 6.35mm 1 A Bipolar 19.1mm 55.3mm - 5.7Ω -
RS庫存編號 892-9158
製造零件編號P110-064-015.12
BrandPortescap
HK$1,254.85
單位
15° 7mNm 4 - - Disc Magnet - 650 mA Bipolar - - 1 - 1mNm
RS庫存編號 440-436
BrandRS PRO
HK$211.18
單位
1.8° 70mNm 6 12 V dc 40 x 40mm Hybrid 5mm 160 mA - 73mm 33mm - 75Ω -
RS庫存編號 921-1347
製造零件編號AM0820-V3-18-08 C06.072A 08/1 256:1
BrandFaulhaber
HK$4,204.10
單位
18° 0.65mNm 4 3 V dc - Bipolar, Unipolar 2.34mm 150 mA Bipolar 3.85mm 16.75mm 2 18Ω 0.17mNm
RS庫存編號 440-458
BrandRS PRO
HK$400.68
單位
1.8° 0.50Nm 8 12 V dc 56.4 x 56.4mm Hybrid 6.35mm 600 mA Unipolar 91.1mm 50.5mm - 20Ω -
RS庫存編號 535-0502
BrandRS PRO
HK$627.60
單位
0.9° 1.26Nm 4 2.5 V 56.4 x 56.4mm Hybrid, Permanent Magnet 6.35mm 2.8 A Unipolar 19mm 56mm - 0.9Ω -
RS庫存編號 440-262
製造零件編號82910003
BrandCrouzet
HK$371.80
單位
7.5° 20mNm 6 12.7 V dc - Permanent Magnet 2mm 190 mA Unipolar 7.8mm 21.7mm 2 66Ω -
RS庫存編號 829-3540
製造零件編號SP2563-5160
HK$992.56
單位
1.8° 1.0Nm 4 24 V dc 56 x 56mm Hybrid 6.35mm 2 A Bipolar 19.1mm 81.5mm - 1.5Ω -
RS庫存編號 136-6712
製造零件編號103H5205-4240
HK$300.99
單位
1.8° 0.27Nm 6 24 V dc 42 x 42mm Bipolar, Hybrid 5mm 1 A Bipolar 24mm 42mm - 3.4Ω -
RS庫存編號 878-7752
製造零件編號103H5208-0410
HK$385.18
單位
1.8° 0.30Nm 6 24 V dc 42 x 42mm Bipolar, Unipolar 5mm 1.2 A Unipolar 22.5mm 40.5mm - 2.9Ω -
RS庫存編號 798-3646
BrandRS PRO
HK$1,021.82
單位
1.8° 1.96Nm 6 4.4 V dc 85.8 x 85.8mm Bipolar, Unipolar 14mm 2 A Unipolar 137mm 66mm - 2.2Ω -
RS庫存編號 180-5290
BrandRS PRO
HK$936.48
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 829-3516
製造零件編號103H7126-0740
HK$692.35
單位
1.8° 1.27Nm 6 24 V dc 56 x 56mm Hybrid 6.35mm 3 A Unipolar 19.1mm 77.3mm - 0.9Ω -