2018年4月27日星期五

Are you searching for the best electronic equipment at a reasonable rate?

Are you searching for the best electronic equipment at a reasonable rate? Great! Do you know the right type of equipment to get started? If no, need not worry! Web shopping portals feel delighted to get you introduced to some exclusive collections. Rather than hovering to and fro, you may get the best within a few clicks at the comfort of your home.

Online shopping has now become a common trend due to numerous benefits in the association. Buying the best BLDC Motor is preferable due to a large range of collections along with justified price and ease. These equipment are a bit costly due to which purchasing them from reliable online dealers will give you the best output.

36V 4000RPM 0.44Nm 184W 7.3A Ф57x109mm 57BLR High Speed Brushless DC Motor

Cost Along with Size – Vital Point to Take into Consideration

Cost along with size and functionality are some of the vital things that need to be looked at the time of making an online purchase of electronic gadgets. In case you are searching for something great comprising of numerous functionalities, then you need to pay a bit high and vice versa. The one available with little functionalities may be availed at rock bottom price list. 

Better to go through online classified sites to get into touch with numerous and variable types of items. There is also a possibility that you may get in touch with great deals which will really prove to be highly beneficial. Next comes the turn of size! The selection of size must be done by a number of people for whom you will be cooking. 

Why Decide the Size in a Precise Manner?

People prefer going with motors belonging to gigantic sizes. Also, medium-sized motors have gained high popularity. Functionality is another vital thing that needs to be kept into high consideration. Some of the features that need to be looked after include the following:
  • Easy repairing
  • Availability of parts
  • Efficiency
  • Flexibility

Better to conduct an online survey to get to know more about the same in detail. There are numerous tips by experts that have been aired for the convenience of users. You need to ensure that these tips along with functionalities may be into usage in actual usage rather than sounding soothing. Such vital pieces of information will let you make the right type of selection.

Purchasing of an Optical Encoder from a Reliable Supplier

Whether online or offline, it is recommended to shake hands with a reliable supplier to make the best use of your hard earned investment. If you are planning to purchase the most suitable stepper motor with encoder
, then you must approach the most trustworthy supplier. You may get in touch with a trustworthy supplier online by:
  • Visiting the World Wide Web in a thorough manner
  • Going through reviews that have been posted by previous clients
  • Getting in touch personally with the supplier

The supplier hesitant to open up all details in a broad manner must be abandoned completely. Following these vital tips will let you get in touch with the right type o item online without any difficulty.

2018年4月20日星期五

TWO DIMENSIONS OF Linear Stepper Motor

We’ve all heard linear motors, like those propelling Maglev trains, described as “unrolled” versions of regular electric motors. The analogy is apt and helps to understand how a linear motor works, but it begs the question: what if we could unroll the stator in two dimensions instead of just one?



That’s the idea behind [1.8 deg stepper motor] two-axis stepper motor, which looks like it has a lot of potential for some interesting applications. Build details are sparse, but from what we can gather from the videos and the Hackaday.io post, [BetaChecker] has created a platen of 288 hand-wound copper coils, each of which can be selectively controlled through a large number of L293 H-bridge chips and an Arduino Mega. A variety of sleds, each with neodymium magnets in the base, can be applied to the platen, and depending on how the coils are energized, the sled can move in either dimension. For vertical applications, it looks like some coils are used to hold the sled to the platen while others are used to propel it. There are RGB LEDs inside the bore of each coil, although their function beyond zazzle is unclear.

We’d love more details to gauge where this is going, but with better resolution, something like this could make a great 3D-printer bed. If one-dimensional movement is enough for you, though, check out this linear stepper motor for sale that works on a similar principle.

2018年4月13日星期五

Stepper Motor Control by Varying Clock Pulses

Stepper motor online control circuit is a simple and low-cost circuit, mainly used in low power applications. The circuit is shown in figure, which consist 555 timers IC as stable multi-vibrator. The frequency is calculated by using below given relationship:

types of stepper motors


Frequency = 1/T = 1.45/(RA + 2RB)C Where RA = RB = R2 = R3 = 4.7 kilo-ohm and C = C2 = 100 µF.

The output of timer is used as clock for two 7474 dual ‘D’ flip-flops (U4 and U3) configured as a ring counter. When power is initially switched on, only the first flip-flop is set (i.e. Q output at pin 5 of U3 will be at logic ‘1’) and the other three flip-flops are reset (i.e. output of Q is at logic 0). On receipt of a clock pulse, the logic ‘1’ output of the first flip-flop gets shifted to the second flip-flop (pin 9 of U3). Thus logic 1 output keeps shifting in a circular manner with every clock pulse. Q outputs of all the four flip-flops are amplified by Darling-ton transistor arrays inside ULN2003 (U2) and connected to the stepper motor windings orange ,brown, yellow, black to 16, 15 ,14, 13 of ULN2003 and the red to +ve supply.

The common point of the winding is connected to +12V DC supply, which is also connected to pin 9 of ULN2003. The color code used for the windings is may vary form make to make. When the power is switched on, the control signal connected to SET pin of the first flip-flop and CLR pins of the other three flip-flops goes active ‘low’ (because of the power-on-reset circuit formed by R1-C1 combination) to set the first flip-flop and reset the remaining three flip-flops. On reset, Q1 of IC3 goes ‘high’ while all other Q outputs go ‘low’. External reset can be activated by pressing the reset switch. By pressing the reset switch, you can stop the stepper motor. The motor again starts rotating in the same direction by releasing the reset switch.

Now you have got an idea about the types of super high torque stepper motor
 and its applications if you have any queries on this topic or on the electrical and electronic projects leave the comments below.

2018年4月3日星期二

Three Major Types of Stepper Motor

Three types of stepper motors are in common use today: Permanent magnet, variable reluctance, and hybrid. Of these, hybrid steppers are by far the most popular – they combine the high points of the other two designs using multi-toothed stator poles and a permanent magnet rotor.

No matter the type of stepper motor including nema 17 stepper motor, engineers should be familiar with the three step modes:

Three Major Types of Stepper Motor

Full Step
With 200 total rotor teeth, full step mode is the equivalent of a 1.8-degree full step angle. When the motor is operating as intended, one digital pulse from the device’s driver is equal to one step. Typically, both windings are energized while the current is reversed alternately.

Half Step
In half step mode, the motor rotates at a full 400 steps per revolution. The step angle is .9 degrees, half the amount of full step. This is ideal for producing smoother motion at the expense of a noticeable, though not severe, reduction in torque.

Microstep
A relatively new innovation, microstep mode can subdivide a complete step into 256 microstep. This means a complete revolution is an astonishing 51,200 steps—enhancing positional accuracy and smoothness over a wider variety of speeds.

Stepper Motors 101: How Do They Work?

2018年3月21日星期三

Construction of Hybrid Stepper Motor

The stator of this stepper motor is same as its permanent magnet or reluctance type counterpart. The stator coils are wound on alternate poles. In this, the coils of different phases are wound on each pole, usually two coils at a pole which is referred as a bifilar connection.

The rotor consists of a permanent magnet which is magnetized in axial direction to create a pair of magnetic poles (N and S poles).  Each pole is covered with uniformly spaced teeth. The teeth are made up of soft steel and two section, of which on each pole are misaligned each other by a half-tooth pitch.

Working of Hybrid Stepper Motor:

Working of Hybrid Stepper Motor


This motor works similar to that of permanent magnet stepper motor. The figure above shows 2-phase, 4-pole, 6-tooth rotor hybrid stepper motor. When the phase A-A’ is excited with a DC supply, keeping B-B’ unexcited, the rotor aligns such that the south pole of the rotor faces north pole of the stator while north pole of rotor faces south pole of the stator.

Now, if the phase B-B’ is excited, keeping A-A’ switched off in such a way that upper pole becomes north and lower becomes south, then the rotor will align to a new position by moving through counterclockwise direction. If the phase B-B’ is oppositely excited such that the upper pole becomes south and lower becomes north, then the rotor will turn clockwise direction.

By a proper sequence of pulses to the stator, the motor will turn in desired direction. For every excitation, rotor will get locked into new position, and even if excitation is removed motor still maintains its locked condition due to the permanent magnet excitation. The step angle of this 2-phase, 4-pole, 6-tooth rotor motor is given as 360/ (2 × 6) = 30 degrees. In practice, hybrid motors are constructed with more number of rotor poles in order to get high angular resolution.




2018年3月20日星期二

Stepper Motor Advantages and Disadvantages

Stepper Motor Basics
"A stepper motor is an electromechanical device which converts electrical pulses into discrete mechanical movements. The shaft or spindle of a stepper motor rotates in discrete step increments when electrical command pulses are applied to it in the proper sequence. The motors rotation has several direct relationships to these applied input pulses. The sequence of the applied pulses is directly related to the direction of motor shafts rotation. The speed of the motor shafts rotation is directly related to the frequency of the input pulses and the length of rotation is directly related to the number of input pulses applied."

This is a topic about the Stepper Motor Basics, after read this artical, you will know basic informations about stepper motor.

Stepper Motor Advantages and Disadvantages

Advantages:

1. The rotation angle of the motor is proportional to the input pulse.

2. The motor has full torque at standstill (if the windings are energized)

3. Precise positioning and repeatability of movement since good stepper motors have an accuracy of 3 – 5% of a step and this error is non cumulative from one step to the next.

4. Excellent response to starting/stopping/reversing.

5. Very reliable since there are no contact brushes in the motor. Therefore the life of the motor is simply dependant on the life of the bearing.

6. The motors response to digital input pulses provides open-loop control, making the motor simpler and less costly to control.

7. It is possible to achieve very low speed synchronous rotation with a load that is directly coupled to the shaft.

8. A wide range of rotational speeds can be realized as the speed is proportional to the frequency of the input pulses.

Disadvantages:

1.    Resonances can occur if not properly controlled.
2.    Not easy to operate at extremely high speeds.

The motors that are included in a motor home may be different than a stepper motor but the general dynamics are the same. Those who are looking for a motor home for sale should be especially wary of the condition of the motor, though you can always go to an RV dump site to look for spare parts.

Source:https://www.oyostepper.com/article-1071-Stepper-Motor-Advantages-and-Disadvantages.html