Motor de passo

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Informações Técnicas do Produto

Características	Especificações
Certificado	UL
Certificado	CCC
Certificado	ISO
Certificado	Rohs
Certificado	CE
Corrente / Fase	1.68 a
Ângulo de Passo	1.8 Degree
Fase	2
Tipo	Hybrid
Modelo Número	17hs19-1684s
Torque de Retenção	44 N.cm
Length	47 MM
Step Angle Accuracy	±5% (when NO Loading AND Full Step)
Resistance Accuracy	±10%
Inductance Accuracy	±20%
Insulation Resistance	100 OHM MIN 500vdc
Dielectric Strength	500vac FOR ONE Minute
Shaft Radial Play	0.02 MAX (450g Load)
Shaft Axial Play	0.08 MAX (450g Load)
Lead Wire	4

1. a 44 N.cm And Bipolar 4 Lead Wire – Certificado : Rohs
2. Free Shipping Step Motor 17hs19-1684s l 47 – Certificado : Iso	3. Cheap Motor de Passo – Certificado : Ccc	4. Motor de Passo – Certificado : ul	5. mm Nema 17 With 1.8 Deg 1.68 – Lead Wire : 4
6. High Quality Renovação da Casa – Shaft Axial Play : 0.08 Max 450g Load	7. Renovação da Casa – Shaft Radial Play : 0.02 Max 450g Load	8. a 44 N.cm And Bipolar 4 Lead Wire – Dielectric Strength : 500vac For One Minute	9. Free Shipping Step Motor 17hs19-1684s l 47 – Insulation Resistance : 100 Ohm Min 500vdc

NEMA17 stepper motor 17HS19-1684S 1.8 degree, 1.68 A, 44 N.cm

The Nema 17 Stepper Motor is our most standard and popular size in our stepper motor group, with the highest possible torque and also small dimensions (42 x 42 mm) the Nema 17 Stepper Motor series offers high resolution and is employed with economically priced drives for precision applications. These series Nema 17 Stepper Motor offer a great value without sacrificing quality and were designed to offer the highest possible torque while minimizing vibration and audible noise. We can customize the Stepper Motor winding to perfectly match your voltage, current, and maximum operating speed for maximum flexibility.

!!!Notice!!!:

We produce this stepper motor with &silver motor cover& and &black motor cover& 2 types, because the stock is chaning day by day, so we will send them out at random,please kindly be clear in mind about this.

10. Cheap Motor de Passo – Inductance Accuracy : ±20%

If you really in need of the black cover motor, please contact our online sales and we will arrange the production for you.

Main Application:

Inject printers, Analytical and Medical Instruments, Textile Equipment, Embroidery Machine, Precision Telescope Positioning Systems, High Speed Dome Camera and Robotic

11. Motor de Passo – Resistance Accuracy : ±10%

12. mm Nema 17 With 1.8 Deg 1.68 – Step Angle Accuracy : ±5% When no Loading And Full Step

Notice:

1: Please kindly confirm with the online sales about the stock availability, before the order, even though 90% of the model are all in stock –this will save you valuable time.

2: For bulk order that above 50 pieces, please kindly contact online sales to get the more discount or better money-saving shipping proposal ~

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The basic information about the stepper motor:

A stepper motor (or step 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 commanded to move and hold at one of these steps without any feedback sensor (an open-loop controller), as long as the motor is carefully sized to the application.

Switched reluctance motors are very large stepping motors with a reduced pole count, and generally are closed-loop commutated.

Fundamentals of operation

DC brush motors rotate continuously when voltage is applied to their terminals. Stepper motors, on the other hand, effectively have multiple &toothed& electromagnets arranged around a central gear-shaped piece of iron. The electromagnets are energized by an external control circuit, such as a microcontroller. To make the motor shaft turn, first, one electromagnet is given power, which magnetically attracts the gear's teeth. When the gear's teeth are aligned to the first electromagnet, they are slightly offset from the next electromagnet. So when the next electromagnet is turned on and the first is turned off, the gear rotates slightly to align with the next one, and from there the process is repeated. Each of those rotations is called a &step&, with an integer number of steps making a full rotation. In that way, the motor can be turned by a precise angle.

Types

There are four main types of stepper motors:

1:Permanent magnet stepper (can be subdivided into 'tin-can' and 'hybrid', tin-can being a cheaper product, and hybrid with higher quality bearings, smaller step angle, higher power density)

2:Hybrid synchronous stepper

3:Variable reluctance stepper

4:Lavet type stepping motor

Permanent magnet motors use a permanent magnet (PM) in the rotor and operate on the attraction or repulsion between the rotor PM and the stator electromagnets. Variable reluctance (VR) motors have a plain iron rotor and operate based on the principle that minimum reluctance occurs with minimum gap, hence the rotor points are attracted toward the stator magnet poles. Hybrid stepper motors are named because they use a combination of PM and VR techniques to achieve maximum power in a small package size.

Two-phase stepper motors

There are two basic winding arrangements for the electromagnetic coils in a two phase stepper motor: bipolar and unipolar.

Unipolar motors

A unipolar stepper motor has one winding with center tap per phase. Each section of windings is switched on for each direction of magnetic field. Since in this arrangement a magnetic pole can be reversed without switching the direction of current, the commutation circuit can be made very simple (e.g., a single transistor) for each winding. Typically, given a phase, the center tap of each winding is made common: giving three leads per phase and six leads for a typical two phase motor. Often, these two phase commons are internally joined, so the motor has only five leads.

A microcontroller or stepper motor controller can be used to activate the drive transistors in the right order, and this ease of operation makes unipolar motors popular with hobbyists; they are probably the cheapest way to get precise angular movements.

Unipolar stepper motor coils

(For the experimenter, the windings can be identified by touching the terminal wires together in PM motors. If the terminals of a coil are connected, the shaft becomes harder to turn. one way to distinguish the center tap (common wire) from a coil-end wire is by measuring the resistance. Resistance between common wire and coil-end wire is always half of what it is between coil-end and coil-end wires. This is because there is twice the length of coil between the ends and only half from center (common wire) to the end.) A quick way to determine if the stepper motor is working is to short circuit every two pairs and try turning the shaft, whenever a higher than normal resistance is felt, it indicates that the circuit to the particular winding is closed and that the phase is working.

Bipolar motor

Bipolar motors have a single winding per phase. The current in a winding needs to be reversed in order to reverse a magnetic pole, so the driving circuit must be more complicated, typically with an H-bridge arrangement (however there are several off-the-shelf driver chips available to make this a simple affair). There are two leads per phase, none are common.

Static friction effects using an H-bridge have been observed with certain drive topologies.[2]

Dithering the stepper signal at a higher frequency than the motor can respond to will reduce this &static friction& effect.

Because windings are better utilized, they are more powerful than a unipolar motor of the same weight. This is due to the physical space occupied by the windings. A unipolar motor has twice the amount of wire in the same space, but only half used at any point in time, hence is 50% efficient (or approximately 70% of the torque output available). Though a bipolar stepper motor is more complicated to drive, the abundance of driver chips means this is much less difficult to achieve.

Higher-phase count stepper motors

Multi-phase stepper motors with many phases tend to have much lower levels of vibration,[3] although the cost of manufacture is higher. These motors tend to be called 'hybrid' and have more expensive machined parts, but also higher quality bearings. Though they are more expensive, they do have a higher power density and with the appropriate drive electronics are actually better suited to the application[citation needed]. Computer printers may use hybrid designs.

Stepper motor driver circuits

Stepper motor performance is strongly dependent on the driver circuit. Torque curves may be extended to greater speeds if the stator poles can be reversed more quickly, the limiting factor being the winding inductance. To overcome the inductance and switch the windings quickly, one must increase the drive voltage. This leads further to the necessity of limiting the current that these high voltages may otherwise induce.

Microstepping

What is commonly referred to as microstepping is often &sine cosine microstepping& in which the winding current approximates a sinusoidal AC waveform. Sine cosine microstepping is the most common form, but other waveforms can be used.[4] Regardless of the waveform used, as the microsteps become smaller, motor operation becomes more smooth, thereby greatly reducing resonance in any parts the motor may be connected to, as well as the motor itself. Resolution will be limited by the mechanical stiction, backlash, and other sources of error between the motor and the end device. Gear reducers may be used to increase resolution of positioning.

Step size repeatability is an important step motor feature and a fundamental reason for their use in positioning.

Notice:

1: The default delivery mehod is based on free shipping by Registered Post Service.

2: Becuase there is the dlivery cost of fluctuation of the DHL,UPS, Fedex or TNT, if you are in need of these faster service, please contact our online consultant, and will offer you lowest cost for these express

3: If you are in need of other products with different model, please contact our online sales, will offer you best price and lowest delivery cost–based on GENUINE products.

13. High Quality Renovação da Casa – Length : 47 mm

14. Renovação da Casa – Torque de Retenção : 44 N.cm

15. a 44 N.cm And Bipolar 4 Lead Wire – Modelo Número : 17hs19-1684s

16. Free Shipping Step Motor 17hs19-1684s l 47 – tipo : Hybrid

17. Cheap Motor de Passo – Fase : 2

18. Motor de Passo – Ângulo de Passo : 1.8 Degree

19. mm Nema 17 With 1.8 Deg 1.68 – Correntefase : 1.68 a

20. High Quality Renovação da Casa – Certificado : ce

21. Renovação da Casa – Certificado : Rohs

22. a 44 N.cm And Bipolar 4 Lead Wire – Certificado : Iso

23. Free Shipping Step Motor 17hs19-1684s l 47 – Certificado : Ccc

24. Cheap Motor de Passo – Certificado : ul

25. Motor de Passo – Lead Wire : 4