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 535-0401
BrandRS PRO
HK$258.00
單位
0.9° 0.44Nm 4 2.8 V 42.3 x 42.3mm Hybrid 5mm 1.68 A - 24mm 47mm - 1.65Ω -
RS庫存編號 440-420
BrandRS PRO
HK$220.48
單位
1.8° 70mNm 6 5 V dc 40 x 40mm Hybrid 5mm 500 mA Unipolar 73mm 33mm - 10Ω -
RS庫存編號 535-0445
BrandRS PRO
HK$497.99
單位
1.8° 1.89Nm 4 3.2 V 56.4 x 56.4mm Hybrid, Permanent Magnet 6.35mm 2.8 A - 19mm 76mm - 1.13Ω 72mNm
RS庫存編號 535-0372
BrandRS PRO
HK$233.39
單位
0.9° 2.2mNm 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 892-8732
BrandRS PRO
HK$214.56
單位
1.8° 0.36Nm 4 2.8 V 42.3 x 42.3mm Hybrid, Permanent Magnet 5mm 1.68 A - 22mm 62mm 1 1.65Ω -
RS庫存編號 535-0467
BrandRS PRO
HK$185.30
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 535-0344
BrandRS PRO
HK$325.52
單位
1.8° 60mNm 4 3.8 V 28 x 28mm Hybrid, Permanent Magnet 5mm 670 mA - 18mm 32mm - 5.6Ω -
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$347.13
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 440-442
BrandRS PRO
HK$304.96
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$457.79
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 440-436
BrandRS PRO
HK$240.00
單位
1.8° 70mNm 6 12 V dc 40 x 40mm Hybrid 5mm 160 mA - 73mm 33mm - 75Ω -
RS庫存編號 798-3637
BrandRS PRO
HK$230.80
單位
1.8° 0.42Nm 8 5.7 V dc 56.4 x 56.4mm Bipolar, Unipolar 6.35mm 1 A Unipolar 80.1mm 43.5mm - 5.7Ω -
RS庫存編號 180-5290
BrandRS PRO
HK$1,158.72
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) Ω, 1.3 (Unipolar) Ω, 2.6 (Series) Ω -
RS庫存編號 180-5295
BrandRS PRO
HK$2,293.30
單位
1.8° - 4 2.56 V 85.85 x 85.85mm Hybrid 12.7mm 5.5 A - 30.23mm 96mm - 0.46Ω -
RS庫存編號 798-3640
BrandRS PRO
HK$768.11
單位
1.8° 4.31Nm 6 6.4 V dc 85.8 x 85.8mm Bipolar, Unipolar 14mm 2 A Unipolar 167mm 96mm - 3.2Ω -
RS庫存編號 535-0338
BrandRS PRO
HK$476.87
單位
1.8° 17.5mNm 4 3.96 V 20.2 x 20.2mm Hybrid, Permanent Magnet 4mm 600 mA - 5mm 33mm - 6.5Ω -
RS庫存編號 180-5291
BrandRS PRO
HK$1,424.26
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) Ω, 1.7 (Unipolar) Ω, 3.4 (Series) Ω -
RS庫存編號 191-8384
BrandRS PRO
HK$592.11
單位
1.8° 1.2Nm 8 6 V dc 56.4 x 56.4mm Hybrid 6.35mm 1.8 A - 142.1mm 101.5mm - 3.5Ω -
RS庫存編號 180-5281
BrandRS PRO
HK$410.38
單位
1.8° - 6 12 V 56.4 x 56.4mm Hybrid 6.35mm 400 mA Unipolar 19mm 41mm - 30Ω -