How to Design Industrial Automation Control Systems ?

In the development of the industrial world is so fast that the industry needed automated equipment that can be gained speed, quality and efficiency in production.

In designing industrial Automation systems equipment we have to learn, analyze and apply a few things. As for some of these include:

1.Sensor
Censorship is the first thing we have to learn many types of sensors used in the industrial world, among others: Proximity sensors, heat sensors, pressure sensors, speed sensors and others.

2. Activator
That kind of drive what will we use for example: mechanical gears, hydraulic or pneumatis, Industrial electric motors.

3. Electronic equipment industry
Electronic equipment that is commonly used as a component of the control equipment for industries such as: SCR, TRIAC, transistors, an optocoupler.

4. Motor Drive.

Ie equipment that drives the electric motor such as: Inverters, DC motor control, etc..

5. Control Equipment
Ie component / equipment used as part of industrial Automation control equipment such as contactors, relays, Timers, Counter, Solenoid, limit switches, push buttons,

6. PLC or programmable logic control.
Namely the control equipment used in industrial control equipment. PLC is a compact control devices have input terminals and output terminals. In PLC there is a program to regulate the movement of equipment in the output set by the input equipment. Such as: PLC OMRON, SIEMENS, MITSUBISHI, etc..

If we have mastered all these components is then we can assemble and create automated industrial controls.

Industrial Electric AC Induction Motor And How Do They Work?

Industrial Electric AC Induction Motor And How Do They Work?

Let's take a brief look at a drive application. In a simple application with a
fixed speed fan using a motor starter. You could replace the 3-phase motor starter with
Variable Frequency Drive (VFD) to operate the fan at variable speed. Since you can operate
the fan at any speed below its maximum, you can vary airflow by controlling the motor speed
instead of the air outlet damper.

You call the electric motor like that is AC motor and another motor drive is DC. A motor
drive controls the speed, torque, direction and resulting horsepower of a motor. A DC drive
typically controls a shunt wound DC motor, which has separate armature and field circuits.
AC drives control AC induction motors, and-like their DC counterparts-control speed, torque,
and horsepower.


To understand how a drive controls the motor, we will take a short review of AC induction motors. Fig. 1 shows the construction of an induction motor. The two basic parts of the motor, the rotor and stator, work through magnetic interaction. A motor contains pole pairs. These are iron pieces in the stator, wound in a specific pattern to provide a north to south magnetic
field

Figure 1. AC Induction Motor Construction
Rotor and Stator Operation
With one pole pair isolated in a motor, the rotor (shaft) rotates at a specific speed: the base speed. The number of poles and the frequency applied determine this speed .This formula includes an effect called "slip." Slip is the difference between the rotor speed and the rotating magnetic field in the stator. When a magnetic field passes through
the conductors of the rotor, the rotor takes on magnetic fields of its own. These rotor magnetic fields will try to catch up to the rotating fields of the stator. However, it never does -- this difference is slip. Think of slip as the distance between
the greyhounds and the hare they are chasing around the track. As long as they don't catch up to the hare, they will continue to revolve around the track. Slip is what allows a motor to turn.

We can conveniently adjust the speed of a motor by changing the frequency applied to the motor. You could adjust motor speed by adjusting the number of poles, but this is a physical change to the motor. It would require rewinding, and result in a step change to the speed. So, for convenience, cost-efficiency, and precision, we change the frequency.

We change this ratio to change motor torque. An induction motor connected to a 460V, 60 Hz source has a ratio of 7.67. As long as this ratio stays in proportion, the motor will develop rated torque. A drive provides many different frequency outputs. At any given frequency output of the drive, you get a new torque curve.

Industrial Electric AC motor

AC motor

uses brushless electric currents to turn back on a regular basis over a period of time. The electric motor has two basic elements of power: "stator" and "rotor" as shown in Figure 7 daalam. Stator is a component of static electricity. The rotor is rotating electrical components to operate the motor. The main advantage of AC motor DC motor is that speed AC motor more difficult to control. To overcome this drawback, AC motors can be equipped with variable frequency drives to improve speed and lower power control. induction motor industry is the most popular cycling because of the reliability and easy maintenance. AC motor induction is very cheap (half price or less than the price of a DC motor) and also gives a relationship between power and weight is very high (about twice the DC motor).

synchronous AC motor

Synchronous motor synchronous motor is an AC motor operating at fixed speed at a specific frequency. These engines require the production of electricity in direct current (DC) and the first pair of low, suited to a synchronous motor from use with small loads such as air compressors, generators and changes frequency of the motor. Synchronous motor capable of improving the power factor of the system, so often used in systems using much power. Electrical Energy Equipment: Electric Motors This motor rotates at synchronous speed is given by the formula Ns = 120 F / P Where: f = frequency of delivery frequency P = number of poles

Industrial Automation Related Post :

1.Industrial Electric DC Motor Types
2.Industrial Electric DC motors
3.Industrial Electric Motor
4.Industrial Automation

Industrial Electric DC Motor Types

Industrial Electric DC Motor Types:
1. DC Motor Types separate resources:

Discrete Field and armature voltage.

Advantages of DC Motors
- DC motors provide an excellent speed control for acceleration and deceleration with the effective
- Simple and Strong torque control.
- Allows precise control of motor voltage, which is necessary to control speed and torque.
- DC motors perform better than AC
- DC Motor comfortable portable and very suitable for special applications, such as industrial equipment and machinery.

2. DC motor own resources / Self Excited: shunt motor
In the shunt motor, rolls Field / field (field shunt) connected in parallel with the armature coil / magneto (A)

Shunt DC Motor advantages:
- High torque at low speed
- High speed, and torque remain constant.


DC motor power alone: motor series

In a series motor, rolls Field / field (field shunt) connected in series with the armature coil / magneto (A) as shown in the picture. Therefore, the same as the current field current dynamo.
Following on the series motor speed (Rodwell International Corporation, 1997;
L.M. Photonics Ltd., 2002):
- The speed is limited to 5000 RPM
- Must avoid running series motor with no load will cause the motor
accelerate uncontrollably.
Series motors are suitable for use in the initial ignition requires torque
high, such as crane and hoist lifter

DC Motor Excellence series:
- Speed under Shunt DC Motor
- Torque initial height.

DC Motor Compound / Combined
DC compound motor is a combination of series and shunt motors. In the compound motor,
field winding (shunt field) are connected in parallel and in series with coil dynamo (A) as shown in figure 6. Thus, the motor torque ignition compound has a good beginning and a steady speed. The higher the percentage of incorporation (ie the percentage of field windings are connected in series), the higher the initial ignition of torque that can be handled by this motor.

Example:
- The merger of 40-50% makes this bike suitable for hoist and crane lifting equipment,

Permanent Magnet DC Motor
DC Motor DC Motor Shunt similar Fieldnya only using permanent magnets



DC Motor
Speed 3600 rpm
Voltage 200 VDC
Power 22 KW

Industrial Automation Related Post :

1.Industrial Electric DC Motor Types
2.Industrial Electric DC motors
3.Industrial Electric Motor
4.Industrial Automation