Inverter Training Level 1 Variable Speed Drives The Very Basics………
How Does an AC Motor Work?
What is a Variable Speed Drive (VSD)? <ul><li>(Also known as a Frequency Inverter or simply AC Drive) </li></ul>In its mos...
How does it Work? <ul><li>A VSD works by taking either a single or three phase AC input, this is then rectified (changed) ...
Continued
Single and 3 phase input VSD’s <ul><li>All VSD’s have a 3 phase output, however there are different versions that can be r...
Sizing an Inverter to a motor <ul><li>When selecting an inverter there is some basic information required from the motor y...
Motor Wiring
Where are inverters used ? <ul><li>Water Pumps </li></ul><ul><li>Air Conditioning Fans </li></ul><ul><li>Conveyors </li></...
Industries were inverters are used
Inverter Process
What Questions should I ask the customer? <ul><li>What is the motor size in KW? </li></ul><ul><li>What voltage supply are ...
Inverter Range <ul><li>IC5   </li></ul><ul><li>Single Phase 230VAC Input </li></ul><ul><li>0.4kw~2.2kw </li></ul><ul><li>B...
 
Inverter Range <ul><li>IG5A </li></ul><ul><li>3 PHASE 400VAC Input </li></ul><ul><li>0.4kw~22kw </li></ul><ul><li>Built in...
 
Inverter Range <ul><li>IS7 </li></ul><ul><li>3 Phase 400vac input </li></ul><ul><li>0.75kw~160kw </li></ul><ul><li>Removab...
 
Quiz <ul><li>What does VSD stand for? </li></ul><ul><li>What are VSD’s also know as?   </li></ul><ul><li>Name an applicati...
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Dalroad Norslo - Automation Equipement - Inverter Training level 1 - LS Industrial Systems (former LG)

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Automation & Industrial training session on Variable Speed Drives also known as frequency speed drives or inverters.
The presentation is about LS Industrial Systems, which is the former LG (Industrial Systems), new range of products " Starvert Series" - IC5 - IG5A - IS7.

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Dalroad Norslo - Automation Equipement - Inverter Training level 1 - LS Industrial Systems (former LG)

  1. 1. Inverter Training Level 1 Variable Speed Drives The Very Basics………
  2. 2. How Does an AC Motor Work?
  3. 3. What is a Variable Speed Drive (VSD)? <ul><li>(Also known as a Frequency Inverter or simply AC Drive) </li></ul>In its most basic form a VSD is a device used to alter the speed of a standard 3 phase AC motor. Before the introduction of the VSD voltage to AC motors was switched directly from the supply (Direct on Line), this would allow the motor to run only at a fixed speed, 50Hz for example. This is fine, however in an application that required a variation in speed while maintaining torque other methods were required to change the pace of the motor. AC motor with Gearbox. DC motor with DC speed control. These methods are still used but can be expensive and require ongoing maintenance.
  4. 4. How does it Work? <ul><li>A VSD works by taking either a single or three phase AC input, this is then rectified (changed) to DC, this is then passed through the DC Link to maintain a steady voltage. Once pass the DC Link the voltage is switched by output transistors know as IGBT’s (Insulated Gate Bipolar Transistors) at varying frequencies to form a simulated AC wave form. (See Diagram 1) </li></ul><ul><li>In short the output is still technically DC but by switching the current in short blocks it is possible to fool the motor into thinking it receiving AC, this is know as PWM (Pulse Width Modulation see Diagram 2) </li></ul>
  5. 5. Continued
  6. 6. Single and 3 phase input VSD’s <ul><li>All VSD’s have a 3 phase output, however there are different versions that can be run on either a single phase input or a 3 phase input supply. </li></ul><ul><li>When using an inverter many people use dual voltage 3 phase motors, this means that depending on how the motor is wired (Star or Delta) they can operate at two different voltages 230vac (Delta) or 415vac (Star) for instance. </li></ul><ul><li>By using an inverter it is possible to run the motor from as low as 0.1hz up to 400hz. </li></ul><ul><li>When using a single phase 230vac input supply the VSD will split the input voltage to give a 3 phase 230 volt output to run a 3 phase 230vac motor. This is only available for smaller motors from 0.2kw to 2.2kw. </li></ul><ul><li>If a 3 phase 415vac supply is used the inverter will simply give a 3 phase 415 volt output. </li></ul>
  7. 7. Sizing an Inverter to a motor <ul><li>When selecting an inverter there is some basic information required from the motor you wish to run, this data can be taken direct from the motor plate. </li></ul><ul><li>kW (Kilowatt) rating (Generally the inverter is rated to match the motor kW. There are 1000 Watts in one Kilowatt </li></ul><ul><li>Voltage (on a dual voltage motor this will shown the Delta voltage 230vac followed by the Star voltage 415vac) </li></ul><ul><li>Full Load Current/Amps (on a dual voltage motor this will show the FLC in the delta configuration followed by the FLC in the Star configuration. </li></ul><ul><li>RPM (this will tell you the revs per min at the stated frequency, typically 50hz) </li></ul>
  8. 8. Motor Wiring
  9. 9. Where are inverters used ? <ul><li>Water Pumps </li></ul><ul><li>Air Conditioning Fans </li></ul><ul><li>Conveyors </li></ul><ul><li>Lifts and Cranes </li></ul><ul><li>Fairground Rides </li></ul><ul><li>Mixing Machines </li></ul>
  10. 10. Industries were inverters are used
  11. 11. Inverter Process
  12. 12. What Questions should I ask the customer? <ul><li>What is the motor size in KW? </li></ul><ul><li>What voltage supply are you using Single </li></ul><ul><li>phase (230vac) or 3 Phase (400vac)? </li></ul><ul><li>What is the motor driving (Application)? </li></ul><ul><li>Do you require an EMC (Electro Magnetic Compatibility) filter? </li></ul>
  13. 13. Inverter Range <ul><li>IC5 </li></ul><ul><li>Single Phase 230VAC Input </li></ul><ul><li>0.4kw~2.2kw </li></ul><ul><li>Built in potentiometer (speed control) </li></ul><ul><li>400hz max output frequency </li></ul><ul><li>Built in EMC Filter (Electro Magnetic Compatibility) </li></ul><ul><li>Small inverter for general applications </li></ul>
  14. 15. Inverter Range <ul><li>IG5A </li></ul><ul><li>3 PHASE 400VAC Input </li></ul><ul><li>0.4kw~22kw </li></ul><ul><li>Built in LED Keypad </li></ul><ul><li>For use in General purpose applications </li></ul><ul><li>External foot print EMC filter </li></ul><ul><li>400hz max output frequency </li></ul>
  15. 17. Inverter Range <ul><li>IS7 </li></ul><ul><li>3 Phase 400vac input </li></ul><ul><li>0.75kw~160kw </li></ul><ul><li>Removable LCD keypad </li></ul><ul><li>Built in EMC Filter from 0.75kw~22kw </li></ul><ul><li>For use with high torque industrial applications </li></ul>
  16. 19. Quiz <ul><li>What does VSD stand for? </li></ul><ul><li>What are VSD’s also know as? </li></ul><ul><li>Name an application (use) for and Inverter? </li></ul><ul><li>How may Watts are in a Kilowatt? </li></ul><ul><li>Which inverter type would I use with a single phase supply? </li></ul><ul><li>What is the largest size (KW) available in IG5? </li></ul><ul><li>What is the part number for a single phase 0.4kw inverter with Filter? </li></ul>

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