Showing posts with label Automation. Show all posts
Showing posts with label Automation. Show all posts
Sunday, 5 March 2017
Types of Actuators used for Motion in Automation with Advantages Disadvantages
Types of Actuators used for Motion in Automation with Advantages & Disadvantages
The actuators used for performing motion (which includes control of speed, positional accuracy or torque) are
• Air Motors
• AC Induction Motors
• Clutch/Brake
• Stepper Motors
• Hydraulic Motors
• Servomotors
1) Air Motors –
This uses “compressed air” to create motion. Pressure and flow determine speed and torque. Positional accuracy is not a required.
Advantages:
1. Low cost
2. Available components
3. Maintenance easy
4. Simple
5 .Centralized power source
Disadvantages:
1. Audible compressor noise
2. Difficult to regulate speed
3 Prone to contamination
4. Energy inefficient
2) Hydraulic motors –
This uses “pressurized oil” to move a piston. Higher pressure results in higher torque (i.e. brute force).
Advantages:
1 .Easy to apply
2. High torques
3. Centralized power source
4. Simple
Disadvantages:
1. Audible noise
2. Difficult to control speed
3. Slow positioning
4. Prone to leaks
5. Energy inefficient
6. High maintenance required
3) Clutch/Brake –
A device couples a continuously rotating shaft and a load. Uncoupling the load results in stopping of shaft. Varying on/off time results in varying distances
Advantages:
1. Easy to apply
2. Low cost
3. Good for start/stop (not used with high loads)
4. Easy to provide speed matching
Disadvantages:
1. Uncontrolled acceleration
2. Inaccurate
3. Prone to wear
4. Non-repeatable performance
4) Stepping Motors –
Electromechanical device which converts one digital pulse into a specific rotational movement/Step or displacement. A "train of pulses" results in rotational speed.
Advantages:
1. Simple control
2. Moderate cost
3. Good for constant loads
4. Good positional accuracy
Disadvantages:
1. Prone to losing steps
2. Not good for varying loads
3. Energy inefficient
4. Large motor size
5. Resonance problems
5) AC Induction Motors –
Widely used for constant speed requirements. Electric "starters" provide connections/start-up/overload protection. Newer technology provides variable speed Drive capability.
Advantages:
1. Simple motor
2. Low cost
3. Mature technology
4. Straightforward on/off control
5. Affordable coarse speed control
6 .Simple wiring
7. Wide product variety
8. Many vendors available
Disadvantages:
1. Limited position control
2. Relatively larger size
6) Servomotors –
A motor with a "feedback" device called as encoder. High speed and position accuracy
Advantages:
1. High performance
2. Small size
3. Wide variety of components
4. High speeds available with specialized controls
Disadvantages:
1. High cost
2. High performance limited by controls
3. High speed, torque is limited.
Sunday, 13 November 2016
Apple iHome Apple center for home automation and home of the future
Apple introduced its new platform for home automation or home automation, but this new concept called iHome might be suitable for this device.
Clearly, Apple also wants to enter the home automation or home automation with its new HomeKit platform, but do not know if we could see a related product company in the near future.
Nevertheless, a new concept called iHome shows could be seen as a control center which is responsible for automating our home and is very similar to an iPod Nano.
IHome concept, created by Martin Hajek, offers a better integration of the different functions of household appliances to function as better control than the iPhone.
The iHome has the ability to function as a thermostat, control the lights switched on or off, the power consumption, the alarm and until the music would sound in different parts of your home.
IHome screen has the ability to display the total electricity consumption and the current temperature.
The possibility exists that this information can be transmitted to an iPhone or iPad so you can better analyze and control all data remotely.
iHome integrate the fingerprint Apple (iTouch) Yunos speakers on the bottom that could be used to alert the user when they have made a selection.
Finally, iHome include a front camera that could serve as a kind of extra security for your home and will be connecting to the Internet via Wi-Fi.
Could this be your new entertainment center that controls everything in your home?
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