iacs-supplement notes on pneumatic electropneumatic
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8/8/2019 IACS-Supplement Notes on Pneumatic Electropneumatic
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Electrical & Electronics Engineering, UTPCourse Instructor: Dr Nordin Saad11-- 11
EAB4223/EEB 5223EAB4223/EEB 5223--Supplements notesSupplements notes
on Pneumatic & Electroon Pneumatic & Electro--pneumaticspneumatics
Contents:
Introduction to pneumatic &electro-pneumatic systems
Designing pneumatic and electro-pneumatic circuits
Assoc. Prof. Dr Nordin Saad
Department of Electrical & Electronics Engineering
Universiti Teknologi PETRONAS
Email: nordiss@petronas.com.my
Tel: 05-368 7835
Therelevant
slidesare
1-1-1-6,and
1-16-1-18.
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8/8/2019 IACS-Supplement Notes on Pneumatic Electropneumatic
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Electrical & Electronics Engineering, UTPCourse Instructor: Dr Nordin Saad11-- 22
Designing Pneumatic & ElectroDesigning Pneumatic & Electro--pneumatic circuitspneumatic circuits
Objectives:Objectives:
1. Familiarize with the terms, symbols of pneumatic andelectro-pneumatic components.
2. Design and build pneumatic and electro-pneumaticcircuits.
3. Use simulation software (Automation Studio, PneusimPro).
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8/8/2019 IACS-Supplement Notes on Pneumatic Electropneumatic
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8/8/2019 IACS-Supplement Notes on Pneumatic Electropneumatic
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Electrical & Electronics Engineering, UTPCourse Instructor: Dr Nordin Saad11-- 44
Designing Pneumatic & ElectroDesigning Pneumatic & Electro--pneumatic circuitspneumatic circuits
Pneumatic circuitsPneumatic circuits
Directional valves
Valves are named (represented) according to
number of ports
number of control positions
2/2 way NC valve
2/2 way NO valve
3/2 way NC valve
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8/8/2019 IACS-Supplement Notes on Pneumatic Electropneumatic
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Electrical & Electronics Engineering, UTPCourse Instructor: Dr Nordin Saad11-- 55
Designing Pneumatic & ElectroDesigning Pneumatic & Electro--pneumatic circuitspneumatic circuits
Pneumatic circuitsPneumatic circuits
Directional valves actuations
Valves may be actuated by
manual actuation
mechanical actuation
pressure (pneumatic) actuation
electronic (electrical or electronics relay actuation)**
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Electrical & Electronics Engineering, UTPCourse Instructor: Dr Nordin Saad11-- 66
Designing Pneumatic & ElectroDesigning Pneumatic & Electro--pneumatic circuitspneumatic circuits
Pneumatic circuits examplesPneumatic circuits examples
3/2 way NC valve, PB actuated, spring returned
3/2 way NO valve, PB actuated, spring returned
5/2 way valve, pressure actuated, pressurereturned
3/2 way NC valve, roller actuated, spring returned
4/2 way valve, pressure actuated, spring returned
and e.t.c
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8/8/2019 IACS-Supplement Notes on Pneumatic Electropneumatic
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Electrical & Electronics Engineering, UTPCourse Instructor: Dr Nordin Saad11-- 77
Designing Pneumatic & ElectroDesigning Pneumatic & Electro--pneumatic circuitspneumatic circuits
Pneumatic circuitsPneumatic circuits
Using Combinational Logic similar to designing of electrical andelectronic circuits (digital logic).
COMBINATIONALCIRCUITS
Input
a
b
c
zOutput
The circuit is defined with the aid of a TRUTH Table.
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8/8/2019 IACS-Supplement Notes on Pneumatic Electropneumatic
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Electrical & Electronics Engineering, UTPCourse Instructor: Dr Nordin Saad11-- 88
Designing Pneumatic & ElectroDesigning Pneumatic & Electro--pneumatic circuitspneumatic circuits
Pneumatic circuitsPneumatic circuits
a b c z0 0 0 00 0 1 00 1 0 10 1 1 1
1 0 0 01 0 1 1
1 1 0 01 1 1 0
0 01 1
0 00 1
c c
a b
a b
a b
a b
a b
a b c
z = a b + a b c
Obtain switching functions for z, considering when the output =1.
Check for minimization using Algebra, or mapping technique.
EXAMPLE 1
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8/8/2019 IACS-Supplement Notes on Pneumatic Electropneumatic
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Electrical & Electronics Engineering, UTPCourse Instructor: Dr Nordin Saad11-- 99
Designing Pneumatic & ElectroDesigning Pneumatic & Electro--pneumatic circuitspneumatic circuits
Pneumatic circuitsPneumatic circuits
Realization of thepneumatic circuits.
3/2 NC valve
3/2 NO valve
OR logic(Shuttle valve)
5/2 NOvalve
a
b
c
a
a
b
c
a
a b a b
b
a b
a b
a b c
a b a b c
Double actingcylinder
Implement the
logics. E.g. 3/2 NOis analogy to NOTgate, shuttle valveis analogy to ORgate.
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8/8/2019 IACS-Supplement Notes on Pneumatic Electropneumatic
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8/8/2019 IACS-Supplement Notes on Pneumatic Electropneumatic
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Electrical & Electronics Engineering, UTPCourse Instructor: Dr Nordin Saad11-- 1111
Designing Pneumatic & ElectroDesigning Pneumatic & Electro--pneumatic circuitspneumatic circuits
Pneumatic circuitsPneumatic circuits
Set: PB AND a-
Reset: a+
a- a+
Available, Three controlsignals, PB, a-, a+
The SET/RESET foractuator: PB
PB AND a-
Identify the controlsignals
Produce the Set/Reset
Implement the logic.
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8/8/2019 IACS-Supplement Notes on Pneumatic Electropneumatic
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Electrical & Electronics Engineering, UTPCourse Instructor: Dr Nordin Saad11-- 1212
Designing Pneumatic & ElectroDesigning Pneumatic & Electro--pneumatic circuitspneumatic circuits
Pneumatic circuits (example)Pneumatic circuits (example)Design another circuit that would operates similar to example 2.
The sequence will only start when TWO PB are pressed at the same time.
Given that the pneumatic circuit consists of the following components:
PB (x2),
a double acting cylinder,
3/2 way NC valve, pressure actuated, spring returned (x1), and
a 5/2 way valve, pressure actuated.
Assume that, initially the cylinder is in the retract position.
Produce t he required circuit. (next page)
EXAMPLE 3
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8/8/2019 IACS-Supplement Notes on Pneumatic Electropneumatic
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Electrical & Electronics Engineering, UTPCourse Instructor: Dr Nordin Saad11-- 1313
Designing Pneumatic & ElectroDesigning Pneumatic & Electro--pneumatic circuitspneumatic circuits
Pneumatic circuitsPneumatic circuits
Set: PB1 AND PB2
Reset: spring returned.
Available, two controlsignals: PB1, PB2
The SET/RES ET for actuator:
PB1
PB1 AND PB2
PB2
Reset: spring
returned.
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Electrical & Electronics Engineering, UTPCourse Instructor: Dr Nordin Saad11-- 1414
Designing Pneumatic & ElectroDesigning Pneumatic & Electro--pneumatic circuitspneumatic circuits
ElectroElectro--pneumatic circuitspneumatic circuits
1. Input elements (electrical)-sensors: eg. Electrical Pushbutton (PB), proximity sensor, electrical limit switch.
2. Electrical processors: e.g. PLC, personal computer, relay,
etc.
3. Output elements (electrical)-actuators: electrical motor,stepper motor, servo motor, buzzer, lamp, LED.
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Electrical & Electronics Engineering, UTPCourse Instructor: Dr Nordin Saad11-- 1515
Designing Pneumatic & ElectroDesigning Pneumatic & Electro--pneumatic circuitspneumatic circuits
ElectroElectro--pneumatic circuits (example)pneumatic circuits (example)Modify example 3, using electrical control. The sequence will only start whenTWO PB are pressed at the same time.
Given that the pneumatic circuit consists of the following components:
PB (x2),
a double acting cylinder, anda 5/2 way valve, coiled actuated.
Assume that, initially the cylinder is in the retract position.
Produce the required circuit.
Direct control
Indirect control (i.e. via electronic relay)
EXAMPLE 4
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8/8/2019 IACS-Supplement Notes on Pneumatic Electropneumatic
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Electrical & Electronics Engineering, UTPCourse Instructor: Dr Nordin Saad11-- 1616
Designing Pneumatic & ElectroDesigning Pneumatic & Electro--pneumatic circuitspneumatic circuits
ElectroElectro--pneumatic circuitspneumatic circuits
1 2
24V1
21
21
2
1
2
3
4
5
0V
PB1
PB2
Y1
Y1
1 2
24V1
21
21
2
1
2
3
4
5
0V
1
2
1
2
PB1
PB2
Y1
Y1
K1
K1
Direct Indirect
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8/8/2019 IACS-Supplement Notes on Pneumatic Electropneumatic
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Electrical & Electronics Engineering, UTPCourse Instructor: Dr Nordin Saad11-- 1717
Designing Pneumatic & ElectroDesigning Pneumatic & Electro--pneumatic circuitspneumatic circuits
ElectroElectro-- pneumatic circuits (example)pneumatic circuits (example)Modify example 2, using electrical control (instead of the pneumatic control)..
The solenoid is to be indirectly controlled via a coil. Given that the electro-pneumatic circuit consists of the following components:
PB (x1),
a double acting cylinder,3/2 way NC valve, roller actuated, spring returned (x2), and
a 5/2 way valve.
Note that: The TWO 3/2 way valves are used to detect the position of the cylinder,either retracted, or extended, coil, and relay.
Assume that, initially the cylinder is in the retract position.
EXAMPLE 5
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8/8/2019 IACS-Supplement Notes on Pneumatic Electropneumatic
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Electrical & Electronics Engineering, UTPCourse Instructor: Dr Nordin Saad11-- 1818
Designing Pneumatic & ElectroDesigning Pneumatic & Electro--pneumatic circuitspneumatic circuits
ElectroElectro--pneumatic circuitspneumatic circuits
24V
0V
Y1
A- A+
PB1
A-
A+
K1
K1 K1
Y1
Pneumatic circuitElectro-pneumatic circuit
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