Understanding

“VFD”

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Variable Frequency Drive

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Practical

Demonstration of

VFD

Delta- M Series

1.5 KW

I/P: 230V 1/3 Phase

O/P: 230 3 Phasenfi

Motor OFF Command Freq. Parameters Direction AmperesOutput Freq.

VFD Status Screen

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Keypad Control

TerminalsFreq. Display

POT

Extended

Terminal Blocksnfi

Control Terminals

Relay Feedback

TerminalsFreq. Feedback

Analog Voltage

Input

Analog Current

Inputnfi

Motor Brake

Terminals

Motor Output

Terminals

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3 Phase/ 1 Phase

220 VAC

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Important Parameters used in various Applications

Source of Frequency Command

• Master frequency determined by digital keypad

• Master frequency determined by 0 to +10 V input on

AVI terminal

• Master frequency determined by 4 to 20mA input on

ACI terminal

• Master Frequency Determined by Rs 485 Comm. port

• Master frequency determined by potentiometer on

digital keypad

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Important Parameters used in various Applications

Source of Frequency Command

• Master frequency determined by digital keypad

Frequency Increment

Frequency Decrement

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Important Parameters used in various Applications

Source of Frequency Command

• Master frequency determined by 0 to +10 V input on

AVI terminal

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Important Parameters used in various Applications

Source of Frequency Command

• Master frequency determined by 4 to 20mA input on

ACI terminal

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Important Parameters used in various Applications

Source of Frequency Command

• Master frequency determined by Rs 485 Comm. port

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Important Parameters used in various Applications

Source of Frequency Command

• Master frequency determined by potentiometer on

digital keypad

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Important Parameters used in various Applications

Source of Operation Command

• Operation determined by digital keypad

• Operation determined by external control terminals,

keypad STOP is effective

• Operation determined by external control terminals,

keypad STOP is ineffective

• Operation determined by RS 485 Comm. port,

keypad STOP is effective

• Operation determined by RS 485 Comm. port,

keypad STOP is ineffectivenfi

Important Parameters used in various Applications

Source of Operation Command

• Operation determined by digital keypad

RUN

STOP

VFD RUNNINGVFD STOP

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Important Parameters used in various Applications

Source of Operation Command

• Operation determined by external control terminals,

keypad STOP is effective

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Important Parameters used in various Applications

Source of Operation Command

• Operation determined by external control terminals,

keypad STOP is ineffective

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Important Parameters used in various Applications

Source of Operation Command

• Operation determined by external control terminals,

keypad STOP is effective

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Important Parameters used in various Applications

Operation Control of VFD2 Wire Control (1)– On/Off & Direction

from Toggle Button

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Important Parameters used in various Applications

Operation Control of VFD2 Wire Control (2) – On/Off & Direction

from Toggle Button

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Important Parameters used in various Applications

Operation Control of VFD3 Wire Control – On/Off from Push Button &

Toggle Button for Direction Control

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Important Parameters used in various Applications

Source of Operation Command

• Operation determined by RS 485 Comm. port,

keypad STOP is effective

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Important Parameters used in various Applications

Source of Operation Command

• Operation determined by RS 485 Comm. port,

keypad STOP is ineffective

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Important Parameters used in various Applications

STOP Method

• Ramp Stop

• Coast Stop

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Important Parameters used in various Applications

Maximum Output Frequency Range

0 ~ 400 Hz

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Important Parameters used in various Applications

Acc./ Dec. Time

Voltage / Frequency Setting for various Applications

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Important Parameters used in various Applications

Jog FrequencyTo adjust the Speed of Motor at Jog Mode

Jog Acc./ Dec Time0.1 to 600.0 sec or 0.01 to 600.0 sec

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Important Parameters used in various Applications

Second Source of Frequency Command• Keypad Up/Down

• AVI (0-10V)

• ACI (4-20mA)

• Keypad Potentiometer

Reverse Operation Inhibition

Parameter Lock

PLC Operation

Jog Acc./ Dec Time0.1 to 600.0 sec or 0.01 to 600.0 secnfi

VFD

Biasing

“Adjusting Voltage

by Frequency

Curves”

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VFD Biasing

0 5V 10V

1 Volt = 5 Hz

0 Hz

25 Hz

50 Hz

Pr.03=50Hz--Max. output Freq.

Pr.48=0%--bias adjustment

Pr.49=0 -- bias polarity

Pr.50=100% -- pot. freq. gain

Pr.51=0 -- REV disable in negative bias

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0 5V 10V

1 Volt = 5 Hz

0 Hz

25 Hz

50 Hz

10 Hz

Bias Adjustment

Bias Adjustment =

(Bias Range)/(Full range) x 100

= 10/50 x 100

= 20%

Pr.03= 50Hz--Max. output Freq.

Pr.48= 20%--bias adjustment

Pr.49= 0 -- bias polarity

Pr.50= 100% -- pot. freq. gain

Pr.51= 0 -- REV disable in negative bias

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VFD Biasing

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0 5V 10V

0 Hz

25 Hz

50 Hz

10 Hz

Bias Adjustment

(Full Freq. Range – Bias Freq. range) / (Full voltage range) = (Bias Freq. – 0 Hz) / XV

Bias Adjustment = (XV/ Full voltage Range) x 100

Pot. Freq Gain = (Full voltage Range)/ (Effective Voltage Range) x 100

Pot. Freq Gain

-2.5V

Pr.03= 50Hz--Max. output Freq.

Pr.48= 25%--bias adjustment

Pr.49= 0 -- bias polarity

Pr.50= 80% -- pot. freq. gain

Pr.51= 0 -- REV disable in negative bias

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VFD Biasing

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0 5V

1 Volt = 5 Hz

0 Hz

25 Hz

50 Hz

Pot. Freq Gain

10V

Pot. Freq Gain = (Full voltage Range)/ (Effective Voltage Range) x 100

Pr.03= 50Hz--Max. output Freq.

Pr.48= 0%--bias adjustment

Pr.49= 0 -- bias polarity

Pr.50= 200% -- pot. freq. gain

Pr.51=0 -- REV disable in negative bias

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VFD Biasing

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0 5V 10V

50 Hz

15 Hz

Bias Adjustment

Pot. Freq Gain

4.28

Pr.03= 50Hz--Max. output Freq.

Pr.48= 42.8 %bias adjustment

Pr.49= 0 -- bias polarity

Pr.50= 70 % pot. freq. gain

Pr.51= 0 -- REV disable in negative bias

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(Full Freq. Range – Bias Freq. range) / (Full voltage range) = (Bias Freq. – 0 Hz) / XV

Bias Adjustment = (XV/ Full voltage Range) x 100

Pot. Freq Gain = (Full voltage Range)/ (Effective Voltage Range) x 100

VFD Biasing

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0 5V 10V

0 Hz

25 Hz

50 Hz

Bias Adjustment

Bias Adjustment =

(Bias Voltage Range)/(Full Voltage range) x 100

= 1/10 x 100

= 10%

1

Pr.03= 50Hz--Max. output Freq.

Pr.48= 10%--bias adjustment

Pr.49= 1 -- bias polarity

Pr.50= 100% -- pot. freq. gain

Pr.51= 0 -- REV disable in negative bias

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45 Hz

VFD Biasing

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0 5V 10V

0 Hz

25 Hz

50 HzPr.03= 50Hz--Max. output Freq.

Pr.48= ____ bias adjustment

Pr.49= 1 -- bias polarity

Pr.50= ____-- pot. freq. gain

Pr.51= 0 -- REV disable in negative bias

Pot. Freq Gain

Pot. Freq Gain = (Full voltage Range)/ (Effective Voltage Range) x 100

Bias Adjustment =

(Bias Voltage Range)/(Full Voltage range) x 100

= 1/10 x 100

= 10%

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Bias Adjustment

VFD Biasing

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0 5V 10V

0 Hz

25 Hz

50 Hz

Pr.03= 50Hz--Max. output Freq.

Pr.48= 50%--bias adjustment

Pr.49= 1 -- bias polarity

Pr.50= 200% -- pot. freq. gain

Pr.51= 1 -- REV disable in negative bias

Pot. Freq Gain = (Full voltage Range)/ (Effective Voltage Range) x 100

Bias Adjustment =

(Bias Voltage Range)/(Full Voltage range) x 100

= 5/10 x 100

= 50%

25 Hz

50 Hz

7.5V

2.5V

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Rev

Fwd

VFD Biasing

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0 5V 10V

0 Hz

25 Hz

50 HzPr.03=50Hz--Max. output Freq.

Pr.48=100%--bias adjustment

Pr.49=1 -- bias polarity

Pr.50=100% -- pot. freq. gain

Pr.51=1 -- REV disable in negative bias

Bias Adjustment =

(Bias Voltage Range)/(Full Voltage range) x 100

= 10/10 x 100

= 100%

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VFD Biasing

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Important Parameters used in various Applications

Analog Output SignalAnalog Frequency Meter

(0 to Maximum Output Frequency)

Analog Current Meter

(0 to 250% of the rated AC drive current)

Analog Output Gain 0 ~ 200%nfi

Important Parameters used in various Applications

Over–Voltage Stall PreventionOver-Current Stall Prevention during Acceleration

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PLC & VFD Advanced Course4 PLC’s Training

Platforms

For more courses visit www.nfiautomation.org

Course Highlights:

• 30 Live Practical Classes on PLC, Analog Cards & AC drives- VFD

• 100+ PLC Video Tutorials with Lifetime Access & FREE PLC Simulator

• FREE Circuits Diagram

$149

Course Link:http://nfiautomation.org/special-offers/

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Thank You

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