Variable Frequency Drives . Are they worth it?

Presented by Geoffrey D Stone C.Eng FIMechE; CP Eng FIEAust RPEQ Design Detail & Development http://waterhammer.hopout.com.au/ Skype address geoffrey.stone@yahoo.co.uk Pump Applications Using VFDs Are VFDs worth it for pump applications? Have they been oversold to the market?

Why Are VFDs Specified for Pumps ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Pump Speed Control Solutions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Process Solutions-Alternatives ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Pump Selection-The Issues ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

System Design-Issues ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Existing Pump Oversize? ,[object Object],[object Object],[object Object],[object Object],[object Object]

Pump Curve #3 - VFD, control valve or reduced impeller viable

Pumps using VFDs- Considerations ,[object Object],[object Object],[object Object],[object Object],[object Object]

Electrical Design Considerations

What is a Variable Frequency Drive? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Electrical Factors to be Considered ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Mechanical engineers are required to understand the electrical issues

Cable ,[object Object],[object Object],[object Object],[object Object]

Bearing Damage –Induced Shaft Voltage ,[object Object],[object Object],[object Object],[object Object],[object Object]

Motor Cooling ,[object Object],[object Object],[object Object],[object Object]

Efficiency ,[object Object],[object Object],[object Object]

Current ,[object Object],[object Object],[object Object]

Noise Level ,[object Object],[object Object],[object Object],[object Object]

Motor Design Life ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Costs of a Pump/VFD Installation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Commercial-Other ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Conclusions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Useful links ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Variable Frequency Drives . Are they worth it?

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