Stepper Motor uses can be seen in our daily life almost everywhere. Though you cannot see in front of your eyes because it is hidden within the devices like cars, computers, printers, electric razors, washing machines, and more.
Its’ computer controlled stepping can help to have better speed control and positioning. And, due to this reason it the best motor choice for many automated control applications.
What is Stepper Motor?
A stepper motor is actually an electro mechanical device that changes electrical power into mechanical power. It is a brushless synchronous DC motor that divides the full rotation into equal step. The motor position remains controlled as long as the motor is sized as according to the application.
Stepper motor uses the theory of magnets operation to allow the motor shaft turn the accurate distance when electricity pulse is passed to it. It stator consist of eight poles and the rotor consist of six poles.
The rotor actually needs 24 pulses to cover 24 steps for completing one revolution. It means that rotor will cover 15° and in each pulse that motor receives as electricity.
Image Source: bcndynamics
How Stepper Motor actually works?
Stepper motor has rotor and stator. The rotor is the moveable part which is either variable reluctance or permanent magnet while the stator is often constructed with multiphase windings. Stator actually has three or four phase windings that are wounded with the number of poles decided as per the angular displacement per pulses.
Stepper motor works through the pulses that when applied it turned through the particular angle. This angle is actually the point from which motor shaft turns which is always expressed in degree.
The number of pulses given to the motor decides the number of angles to cover. So, the motor shaft position is controlled by the number of pulses. This feature only makes it suitable for open-loop control system where an accurate shaft position is maintained with the fixed number of pulses with no use of feedback sensor.
Image Source: manufacturinget
If the angle of a step is smaller, the number of steps will be greater per revolution and so the accuracy of obtained position will be higher. The largest angle can be 90 degrees and small angle will be as 0.72 degrees. Anyway, the most common steps of the angle which are used are 1.8°, 2.5°, 7.5° and 15°.
The shaft rotation direction depends on the pulses sequence applied to the stator. The shaft speed is directly proportional to the input pulses frequency. So, when a frequency is low, the stepper motor rotates in steps and when the frequency is high, it rotates in continuous speed.
Nowadays, you can find varied types of stepper motors with wide ranges of sizes, constructions, wiring, steps count, gearing, programmed and many other things that are available in the market. These motors are modified with the digital control devices like the computer. And, due to this reason, it is now used in varied areas.
Here are the ten basic stepper motor applications where it is essentially needed. So, let’s know about different areas of its application:
1. Electronic items
Stepper motor is used in the digital camera for focus and zoom function. In addition to this, various auxiliary elements such as cooling fans, CD ROM, also uses the motor. Now, the camera phone is also using motor inside the handset.
Image Source: andcircuit
2. Aircraft and Automotive
Stepper motor helps the car SUV’s and RV’s to catch the signals of telecommunication. It is also used for military antenna, cruise control, automated camera and automated sensing device.
In aircraft, stepper motors are used in sensing devices, aircraft instruments, scanning equipment, antennas and more.
Image Source: aeroexpo
3. Medical Equipment
Step motors are used in scanners, automated device nanoscopic motion control, multi-axis stepper motor microscopic, samples, dispensing device, auto injectors and more.
It is also used inside fluid pumps, blood analysis machinery, dental photography, and respirators.
4. Industrial Equipment
Stepper motors are used in automated production equipment, automotive gauges, and in retrofit kits for CNC machine control. Single and multi-axis stepper motor controllers are used with the motor for automated control.
Image Source: cjmasset
Steppers motors are incorporated in your PC, scanners, optical disk drive, data storage tape drives, bar code printers, printers and many other devices which are used in your office.
6. Scientific Instrumentation
It is used in various scientific equipment like spectrographs, telescope positioning, and more.
Image Source: ekspla
7. Chemical Industry
Various mixing and sampling devices used in chemical industry work on stepper motor controller with environmental testing equipment axis stepper motor controller.
8. Gaming Industry
It is used in the machine that power wheel spinners, card shufflers, and wheel spinners.
Image Source: casinowhizz
9. Security equipment
It is used in the camera which is used for surveillance at various places like the commercial building, markets, local super markets and more.
10. Digital Watches
Mini stepping motors are used in clocks, electric meters, and watches which are machined by the implementations of various techniques.
Image Source: rackcdn.
These are the important usage of steppers motors due to which it is essentially needed almost in every field. Nowadays, you can have the modified stepper motor as per your need with in-built digital technologies.
Anyway, if you want more information concerning to Steppers motor, please let us know in our comment box.
George David is a mechanical engineer who likes sharing innovative engineering ideas through the blog post. His, recent post is related with Stepper motor. This post will be useful for those who are looking for innovative motors for their varied devices.