vfd delta l series
TRANSCRIPT
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VFD – Variable Frequency DriveIntroduction and Operations
Bhuvesh Sharma
Final Year Undergraduate,
Mechatronics Engineering,
ISTC - CSIO
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Purpose
To understand VFD
VFDs working
Understanding its various operations
Preparing program for Operations
Controlling VFD with PLC
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What is a VFD ?
VFD is acronym for Variable Frequency Drive
Also know as Inverter in industries.
Its is used to :• Used to control the speed of Motor
• Make the system intelligent &
• Saves energy
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Specifications of a VFD
We are working on Delta VFD007L21A Its various specifications are written below
Item Number VFD007L21A
Manufacture Delta Products
Nominal Input VAC 240 Volts AC
HP 1
Input Phase 1 or 3
Wattage 0.4 KW
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How does VFD works!
A Variable Frequency Drive converts incoming 50 Hz (could be 60 Hz for different countries) utility power into DC, then converts it to a simulated variable voltage, variable frequency output
Speed of Motor directly Proportional to Frequencyrmp = 120f/p
F: FrequencyP: Number of Poles
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Figure showing working of VFD
Motor
L1
L2
L3
C
L
Input Converter(Diode Bridge)
Output Inverter(IGBT’s)
DC Bus(Filter)+
_+_
+
_
+
_
+ +
_ _
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Simple representation of VFD working
RECTIFIER(AC - DC)
INVERTER(DC - AC)
AC DC AC
VFD
Zero - 120 Hz60 Hz
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How to perform various operations on VFD
VFD gives a good control over the working of 3-phase electrical motor.
What, how to set VFD to perform various operations ?
For this, user must have read the manual of VFD.
Then according to the parameters in manual VFD is programed to perform various operations
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Important Basic parameters of VFD007L21A
Parameter Functioning Value to be set Factory setting
0-02 Reset 10 0
1-00 Maximum output frequency 50 60
1-01 Maximum setting frequency 50 60
1-09 Acceleration time 1 (Taecel 1) As per requirement 10
1-10 deceleration time 1 (Tdecel 1)
As per requirement 10
1-13 Jog Accel Time As per requirement 10
1-14 Jog Decel Time As per requirement 10
1-15 Jog Frequency As per requirement 6
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Important Operation Method Parameters of VFD007L21A
Parameter Functioning Value to be set Factory setting
2-00 Source of Frequency 0-4 0
2-01 Source of Operation 0-4 0
2-04 Reverse Operation Inhibit
0-3 0
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Important Input Function Parameters of VFD007L21A
Parameter Functioning Value to be set Factory setting
4-00 Potentiometer Bias Frequency
0.0-350 Hz 0
4-01 Potentiometer Bias Polarity
0-1 0
4-02 Potentiometer Frequency Gain
1-200 1
4-03 Direction setting for negative bias
0-2 0
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Important Multi-step Speed Parameters of VFD007L21A
Parameter Functioning Value to be set Factory setting
5-00 1 st Step Speed Frequency 0.0-400 0
5-01 2nd Step Speed Frequency 0.0-400 0
5-02 3rd Step Speed Frequency 0.0-400 0
5-03 PLC Mode 0-4 0
5-05 Time Duration Step 0 0-65500 sec 0
5-06 Time Duration Step 1 0-65500 sec 0
5-07 Time Duration Step 2 0-65500 sec 0
5-08 Time Duration Step 3 0-65500 sec 0
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Exercises
Sr. No. Description
1 Start a 3-phase motor with VFD.
2 Change acceleration and deceleration time.
3.1 Change source of Frequency-Potentiometer (0 to 50Hz)
3.2 Change source of Frequency-Potentiometer (-50 to50Hz)
4 4. 2 WIRE SYSTEM
5 3 WIRE SYSTEM
6 Multi-step Speed (Manually)
7 Multi-step Speed (Timer)
8 VFD interfacing with PLC
9 Project
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1. Start a 3-phase motor with VFD.
for this , add parameters given below in VFD:
Parameter Function value
0-02 Reset 10
1-00 Max. operational frequency
50
1-01 Max. setting frequency 50
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2. Change acceleration and deceleration time.
Parameter Function value
0-02 Reset 10
1-00 Max. operational frequency 50
1-01 Max. setting frequency 50
1-09 Acc time Set as per requirement
1-10 Dec time Set as per requirement
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3. Change source of Frequency.
Parameter Function value
0-02 Reset 10
1-00 Max. operational frequency 50
1-01 Max. setting frequency 50
1-09 Acc time As per requirement
1-10 Dec time As per requirement
2-00 Source of frequency 0 digital keypad1 External
potentiometer 3 VR on drive
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Preparing H/W for exercise
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Arranging pot between a range of frequency
Parameter Function value
0-02 Reset 10
1-00 Max. operational frequency 50
1-01 Max. setting frequency 50
1-09 Acc time As per requirement
1-10 Dec time As per requirement
2-00 Source of frequency External potentiometer
4-00 Potentiometer Bias Frequency 0 -50
4-01 Potentiometer Bias Polarity 0 for positive
4-02 Potentiometer Frequency Gain
Adjust according to requirement
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3.1 Varying frequency from 0 to 50 Hz
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3.2 Varying frequency from (-60) to 60 Hz
*Note : change 4-01 to 1 for negative biasing change 2-04 to negative to enable reverse direction
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4. 2 WIRE SYSTEM
Two wire system is used to access external terminal
Figure: shows h/w implementation of 2 wire system
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Parameter Function value
0-02 Reset 10
1-00 Max. operational frequency 50
1-01 Max. setting frequency 50
1-09 Acc time As per requirement
1-10 Dec time As per requirement
2-01 Source of operation 1 Controlled by the external terminals, keypad
STOPenabled.
4-04 Multi-function Input Terminal 2 M0: RUN / STOPM1: FWD / REV
Parameters to be set for 2 WIRE SYSTEM
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5. 3 WIRE SYSTEM
Three wire system is used to access external terminal
Figure :Shows h/w implementation of 3 WIRE SYSTEM
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Parameters to be set for 3 WIRE SYSTEM
Parameter Function value
0-02 Reset 10
1-00 Max. operational frequency 50
1-01 Max. setting frequency 50
1-09 Acc time As per requirement
1-10 Dec time As per requirement
2-01 Source of operation 1 Controlled by the external terminals, keypad
STOPenabled.
4-04 Multi-function Input Terminal 3 3 -Wire Operation
Control mode(M0,M1,M2)
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Multi-step Speed Operations
It is a very important VFD operation , in which we can control VFD speed in steps .
There are two methods of doing this operation
1. manually ( by switches)
2. Automatic (by timer)
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6. Multi-step Speed (Manually)
Parameter Function value
0-02 Reset 10
1-00 Max. operational frequency 50
1-01 Max. setting frequency 50
1-09 Acc time As per requirement
1-10 Dec time As per requirement
2-01 Source of Operation 1
4-04 Multi-function Input Terminal (M1)
2 2 wire system
4-05 Multi-function Input Terminal (M2 7 Multi-Step Speed Command 1
4-06 Multi-function Input Terminal (M3 8 Multi-Step Speed Command 2
5-00 1 st Step Speed Frequency 0.0 to d 400 Hz
5-01 2 st Step Speed Frequency 0.0 to d 400 Hz
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H/W implementation of above exercise
M0 M1 M2 M3 GND
Run/Stop Forward/ Reverse
Speed 1 Speed 2
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7. Multi-step Speed (Timer)Parameter Function value
0-02 Reset 10
1-00 Max. operational frequency 50
1-01 Max. setting frequency 50
1-09 Acc time As per requirement
1-10 Dec time As per requirement
2-01 Source of Operation 0
4-06 Multi-function Input Terminal (M3)
16 Run PLC Program
5-00 1st Step Speed Frequency 0.0 to d 400 Hz
5-01 2nd Step Speed Frequency 0.0 to d 400 Hz
5-02 3rd Step Speed Frequency 0.0 to d 400 Hz
5-03 PLC Mode 2 Continuously execute program cycles
5-05 Time Duration Step 0 0 to d 65500 sec
5-06 Time Duration Step 1 0 to d 65500 sec
5-07 Time Duration Step 2 0 to d 65500 sec
5-08 Time Duration Step 3 0 to d 65500 sec
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PLC Mode 2 Continuously execute program cycles
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One important parameter 5-04
This parameter controls the direction of motion for the Multi-Step Speed Pr.5-00 to Pr.5-02 and the Master Frequency. The original direction of Master Frequency will become invalid.
The equivalent 4-bit number is used to program the forward/reverse motion for each of the 4 speed steps (including Master Frequency). The binary notation for the 4-bit number must be translated into decimal notation and then be entered.
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Figure : Shows ,how to use 5-04 Pr.
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8. Interfacing VFD with Delta PLC
M0 M1 M2 M3 GND
IN OUT
COMCOM
IN 0
IN 1
IN 2
IN 3
OUT 0
OUT 1
OUT 2
OUT 3
PLC VFD input terminals GND should be of VFD
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Project (PLC & VFD)
Problem Statement : Start a Conveyer with VFD . When limit switch 1 or limit switch 2 is pressed the conveyer should change its direction . And when sensor sense any object , speed of conveyer should decrease .
Values : Normal frequency 30 Hz
Second frequency 10 Hz
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Design
Limit switches
Inductive Proximity Sensor
Object
Conveyer
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References
http://www.delta.com.tw/product/em/.../manual/VFD-L_M_EN_20020531.pdf
http://www.slideshare.net/geterrdone/variable-frequency-drives
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Thank You