Static pressure developed by a fan or pump is used directly to control its speed in a new drive unit. System is simpler and more economical than many other speed controllers, although it is less accurate and has a narrower speed range. However, since very accurate control is not usually required for fans and pumps, unit would work well in many applications.
Simpler Variable-Speed Drive for Fan or Pump
NASA Tech Briefs ; 6 , 2
1982-11-01
Miscellaneous
No indication
English
Variable Displacement Pump and Controls-Applied to Variable Speed-Variable Torque Drive Systems
SAE Technical Papers | 1976
|Variable Displacement Pump and Controls - Applied to Variable Speed-Variable Torque Drive Systems
Automotive engineering | 1976
|NTIS | 1981
|NTIS | 1981
|NTRS | 1983
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