Micro Stepper Motor
TSL Motor’s Micro Stepper Motors are based on PM stepper motor technology.In this category, “micro stepper motor” refers specifically to PM stepper motors.Diameters range from 6 mm to 42 mm.Compact size.Stable performance.
TSL has focused on micro stepper motors for many years.We offer strong customization capabilities.Output shaft customization is available.Mounting structures can also be customized.Including double shaft and through-shaft designs.If you cannot find a suitable model, please contact us.
Our mature platform supports efficient custom development.Ideal for camera iris actuators, optical modules, and precision positioning applications.
Explore All of Our Micro Stepper Motor
Basic Structure of a Permanent Magnet Stepper Motor
The basic structure of a permanent magnet stepper motor consists of a rotor with permanent magnets and a stator with multiple electromagnetic coils arranged in phases. When the coils are energized in sequence, the magnetic field interacts with the rotor magnets, causing the rotor to rotate step by step.
Operating Principle of a PM Stepper Motor
A pm stepper motor driver receives external pulse and direction signals, then uses internal logic to energize the motor windings in a specific sequence, enabling forward rotation, reverse rotation, or holding torque.
For a 7.5° two‑phase stepper motor: when both phases are energized, the rotor locks in place (the maximum torque at rated current is the holding torque). Reversing the current of one phase moves the rotor one step (7.5°), and reversing the other phase steps it in the opposite direction. By alternating the excitation sequence, the motor performs continuous high‑precision stepping, requiring 48 steps per full revolution.
Two winding types exist for two‑phase stepper motors:
- Bipolar: one winding per phase; current must reverse within the winding; requires 8 switches; delivers about 40% higher torque.
- Unipolar: two opposite windings per phase; only one is energized at a time; requires only 4 switches.
Frequency–Torque Curve
The frequency–torque curve is an important representation of the output characteristics of a permanent‑magnet stepper motor.
- Pull‑in Torque:The maximum torque at which an energized stepper motor can start and run synchronously at a given fixed pulse frequency without losing steps.
- Pull‑out Torque:The maximum torque that can be applied to the shaft of a running motor at a specified pulse frequency without causing it to lose steps under the given drive conditions.
- Working Frequency Point:The operating speed corresponding to a specific point on the motor’s frequency–torque curve, calculated by n=q⋅Hz/360⋅D,where—Hz = pulse frequency,D = driver subdivision (microstepping),q = step angle
Why Choose TSL?
We are here to assist you throughout the entire process, from prototype development to large-scale, cost-efficient mass production.
Founded in 2009, TSL Motors has been at the forefront of micro DC motor design and manufacturing. With ISO 9001, ISO 14001, and ISO 45001 certifications, TSL is committed to delivering high-quality products that meet international standards.
We offer a wide range of motor solutions, including coin vibration motors,ERM vibration motor, coreless DC motors, Stepper DC Motors,LRA vibration motors, BLDC motors,Brushed DC Motors,Planetary Gear Motors,Spur Gear Motors ,Worm Gear Motor,etc. Our motors are engineered to be cost-effective, reliable, and customizable, catering to various applications across diverse industries.
At TSL, we strive to provide our valued customers with innovative solutions tailored to their specific needs.
Designing motors and mechanisms for a diverse array of industrial, medical, and consumer applications.
Our skilled sales engineers are adept at quickly grasping your unique requirements and offering tailored services. These custom services encompass motor performance parameters such as rated voltage, speed, and current, along with additional features like connectors, wire lengths, rubber boots, plastic/metal capsules, brackets, and spring contacts.
We provide comprehensive support, including detailed drawings and specifications, throughout the entire process from prototype development to mass production.
Our motor manufacturing process is designed to be flexible, enabling us to accommodate both large-scale production and specialized, high-value custom builds to meet diverse customer needs.
We use in-house designed dynamometers to thoroughly test and validate every sample and production batch, ensuring the highest standards of quality and performance.
TSL Motor is an ISO 9001:2015 certified company, committed to ensuring that each motor meets your precise specifications and performance standards. We have developed a comprehensive after-sales support system, offering prompt responses to customer inquiries and addressing any issues or needs that may arise. Our commitment doesn’t end with delivery—we are here to support you every step of the way.
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Our engineering team brings decades of motor technology expertise to every project.
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