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 180-5294
BrandRS PRO
HK$1,484.60
單位
1.8° - 4 2.3 V 85.85 x 85.85mm Hybrid 12.7mm 5.5 A - 30.23mm 80mm - 0.42Ω -
RS庫存編號 181-6694
製造零件編號EMMS-ST-87-M-S-G2
BrandFesto
HK$2,700.24
單位
1.8° - - 48 V dc - Hybrid 11mm 9.5 A - 27mm 114.9mm - 0.23Ω -
RS庫存編號 877-7219
製造零件編號23HSX-206-CE
HK$1,431.83
單位
1.8° 0.75Nm 8 (Connector Pins) 70 V dc 23mm Hybrid 6.35mm 3 A Bipolar, Unipolar 19mm 56.6mm - 0.7Ω -
RS庫存編號 798-3643
BrandRS PRO
HK$1,021.82
單位
1.8° 1.76Nm 6 5.1 V dc 56.4 x 56.4mm Bipolar, Unipolar 6.35mm 3 A Unipolar 139.6mm 103mm - 1.7Ω -
RS庫存編號 136-6714
製造零件編號103H7123-1749
HK$501.50
單位
1.8° 1.10Nm - - 56 x 56mm - 6.35mm 4 A Bipolar 20.6mm 56mm - 0.4Ω -
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 892-9316
製造零件編號35L048D1B
BrandPortescap
HK$417.33
單位
7.5° 54mNm - - - Bipolar, Unipolar 2mm 450 mA - - 32.38mm - - -
RS庫存編號 535-0366
BrandRS PRO
HK$791.53
單位
1.8° 0.12Nm 4 6.2 V 28 x 28mm Hybrid, Permanent Magnet 5mm 670 mA - 18mm 51mm - 9.2Ω -
RS庫存編號 183-3582
製造零件編號SF2423-10B41
HK$445.05
單位
1.8° 0.56Nm 4 24 V dc 42 x 42mm Hybrid 5mm 1 A Bipolar 24mm 59.5mm - 6.5Ω -
RS庫存編號 181-6681
製造零件編號EMMS-ST-42-S-SEB-G2
BrandFesto
HK$5,808.76
單位
1.8° - - 48 V dc - Hybrid 5mm 1.8 A - 24mm 127mm - 1.75Ω -
RS庫存編號 877-7238
製造零件編號STM23Q-2RE
HK$4,939.36
單位
1.8° 0.88Nm 8 12 70 V dc 23mm Dual Hybridge 6.35mm 5 A - 18.4mm 92.4mm - - -
RS庫存編號 892-9182
製造零件編號P532 258 004.10
BrandPortescap
HK$2,305.85
單位
3.6° 0.36Nm 8 - 52 x 52mm Disc Magnet 5mm 2 A Parallel, Series 19.15mm 55mm 1 2.2Ω 28mNm
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 180-5282
BrandRS PRO
HK$344.48
單位
1.8° - 6 6 V 56.4 x 56.4mm Hybrid 6.35mm 850 mA Unipolar 19mm 51mm - 7.1Ω -
RS庫存編號 181-6684
製造零件編號EMMS-ST-57-S-SB-G2
BrandFesto
HK$4,524.27
單位
1.8° - - 48 V dc - Hybrid 6.35mm 5 A - 20.6mm 123.5mm - 0.15Ω -
RS庫存編號 136-6708
製造零件編號2H5676B20S340
HK$1,283.37
單位
1.8° 1.27Nm 4 36 V dc 56 x 56mm Bipolar 6.35mm 2 A Bipolar 20.6mm 56mm - 1.05Ω -
RS庫存編號 181-6683
製造零件編號EMMS-ST-57-S-SE-G2
BrandFesto
HK$2,490.56
單位
1.8° - - 48 V dc - Hybrid 6.35mm 5 A - 20.6mm 102.5mm - 0.15Ω -
RS庫存編號 535-0489
BrandRS PRO
HK$300.19
單位
1.8° 0.44Nm 4 2.8 V 42.3 x 42.3mm Hybrid, Permanent Magnet 5mm 1.68 A - 22mm 47mm - 1.65Ω -
RS庫存編號 180-5278
BrandRS PRO
HK$235.17
單位
1.8° - 6 9.6 V 42.3 x 42.3mm Hybrid 5mm 400 mA Unipolar 22mm 33mm - 24Ω -
RS庫存編號 892-9154
製造零件編號P010-064-003.02
BrandPortescap
HK$1,568.65
單位
15° 2.5mNm 4 - - Disc Magnet 1.5mm 370 mA Bipolar, Unparallel 2.9mm 26mm 1 0.04mNm