Energy Saving By using Variable Frequency Drive

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Energy Saving By using Variable Frequency Drive
Messung systems Pvt. Ltd.
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• NEED OF Energy Saving
• Global warming
• Shortage of Power in India
• Reduce MD ( Maximum Demand)

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Cost of Running Motor

• gt70 is pent on energy bills

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Energy Consumption Cube low

• Flow ? Speed
• Torque ? Square of Speed (T ? N 2 )
• N X T ? N 2 X N
• Power ? Cube of Speed (P ? N 3 )
• 10 Reduction of speed gives 25 Power Saving

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Conventional Flow Control

• Convention Flow Control
• Flow control using control valves
• Motor is running at full speed

Energy lost
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Role of VFD in Flow Control

• Remove Valve/damper.
• Flow control by reducing Motor speed by VFD

Energy Saving
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Potential Areas of energy saving In Industries

• Fan
• Pump
• Compressor
• Plastic injection molding machine
• Mechanical press

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Fan Control

• Basic Methods of Flow Control W/O VFD
• Damper control
• Advantages of VFD Control
• Speed of the fan is reduced with a corresponding
  cube root reduction in power consumed.
• 20 reduction of Speed will give 50 of Energy
  saving.
• Internal PID of the drive can be used for
  Process control.

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Fan Control

• VFD Selection
• Variable Torque Rating 110 Overload for 1 Min.
• As per Motor Currents not as per kW.
• Application areas
• ID / FD fan
• AHU
• Cooling tower
• Blowers
• Application Reference
• Almost 3000 Drives for Energy Saving
• Paint shops Bajaj, Mul, HHML, Telco (30 kW to
  160 kW)
• Ultratek Cement 220kW blower
• Tata motors 75kW to 132kW

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Pump Control

• Basic Methods of Flow Control
• Valve ( Throttling )
• Bypass / Venting
• Advantages of VFD Control
• Speed of the fan is reduced with a corresponding
  cube root reduction in power consumed.
• 20 reduction of Speed will give 50 of Energy
  saving.
• Internal PID of the drive can be used for
  Process control.

To Process
Process variable
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Pump Control

• VFD Selection
• Variable Torque Rating 110 Overload for 1 Min.
• As per Motor Currents not as per kW.
• Application areas
• Service water pump
• Chiller pump
• Pressure boosting pump
• Primary/Sec. pump
• Application Reference
• Almost 3000 Drives for Energy Saving
• Electro Pneumatic Hydraulic pump 45kW
• Bajaj auto 75kW to 132kW

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Compressor application

• Basic Methods of compressor control
• Loading / Unloading by pressure switch
• Advantages of VFD Control
• Major energy saving in unloading period
• Precise Pressure Control
• PID control
• VFD Selection
• Variable Torque Rating 150 Overload for 1 Min.
• As per Motor Currents not as per kW.

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Compressor application

• Application areas
• Reciprocating compressor
• Screw compressor
• Chiller compressor
• Application Reference
• Shriram Piston ,Delhi 132 kW x 1no
• Roots, Coimbatore 37 kW x 2 Nos.
• Kirloskar Copeland ,Karad 55 kW x 5 Nos.
• JB Chemicals ,Ahmedabad 18.5 kW

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Typical compressor scheme
Comp 2
Comp 1
Reservoir
Motor 1
Motor 2
Distribution Of Compressed Air
Conventional Power Supply
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PIMM Application

• Scope of energy saving
• Hydraulic pump are used to mould plastic parts.
• the power requirement of molding machine will be
  much less in ideal period.
• Advantages of VFD Control
• Energy saving Approx. 20 30
• Simplicity Easy to retrofit
• Reduced wear tear

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PIMM Application

• VFD Selection
• Variable Torque Rating 120 Overload for 1 Min.
• As per Motor Currents not as per kW.
• Application Reference
• PIMM Uma Plastic 75 kW, 220kw Drive Nexgen
  PLC.
• Die-casting SCL foundary, Ucal Fuel. 15 kW to
  37 kw

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Press Application

• Scope of energy saving
• Ideal running of press
• Advantages of VFD Control
• Optimum press speed
• Energy saving
• Power factor improvement
• Reasonable speed accuracy
• Dynamic Braking allows quick stoppage of flywheel

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Press Application

• VFD Selection
• Variable Torque Rating 150 Overload for 1 Min.
• As per Motor Currents as per kW.
• Application Reference
• HMT Hyderabad Rating 2.2kW to 132kW
• ISJECK Yamunanagar Rating 11kW to 90kW

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Additional benefits of using VFD

• Soft starting
• High starting torque
• Flexibility in control system
• Protection
• Diagnostic capabilities
• Interface with other control SH

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Available Products
A700
E700
D700
0.4
3 .7 7.5 15 55
630
KW Rating

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Energy saving features

• Optimum excitation control
• Energy saving mode
• Catch Spin Function
• PID control
• Energy/ Cost saving monitoring
• Electronic bypass for Change over.
• Multiple overload rating according to
  application
• Built-in PLC

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Unique features of VFD

• Major fieldbus supports
• Profibus -DP, Devicenet, CC-Link, Lonworks
  etc.
• Modbus RTU as standard
• Component life check function
• Inrush current limiting circuit, cooling
  fan, Main circuit.
• Long life design - 10 year design life
• Catch spin / Flying start
• Regeneration avoidance function
• USB communication
• Ambient temperature 50 Deg. C.
• Fan failure detection
• AC voltage range 325 to 528 VAC

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Thank you