BS ISO 14839-3:2006

Foreword
Introduction
1 Scope
2 Normative references
3 Preceding investigation
4 Outline of feedback control systems
5 Measurement procedures
6 Evaluation criteria
Annex A (informative) Case study 1 on evaluation of stability
                      margin
Annex B (informative) Case study 2 on evaluation of stability
                      margin
Annex C (informative) Field data of stability margin
Annex D (informative) Analytical prediction of the system
                      stability
Annex E (informative) Matrix open loop used for a MIMO system
Bibliography

Defines the stability requirements of rotating machinery equipped with active magnetic bearings (AMB). It also defines a particular index to evaluate the stability margin and delineates the measurement of this index.

This part of ISO14839 establishes the stability requirements of rotating machinery equipped with active magnetic bearings (AMB). It specifies a particular index to evaluate the stability margin and delineates the measurement of this index.

It is applicable to industrial rotating machines operating at nominal power greater than 15kW, and not limited by size or operational rated speed. It covers both rigid AMB rotors and flexible AMB rotors. Small-scale rotors, such as turbo molecular pumps, spindles, etc., are not addressed.

This part of ISO14839 concerns the system stability measured during normal steady-state operation in-house and/or on-site.

The in-house evaluation is an absolute requirement for shipping of the equipment, while the execution of on-site evaluation depends upon mutual agreement between the purchaser and vendor.

This part of ISO14839 does not address resonance vibration appearing when passing critical speeds. The regulation of resonance vibration at critical speeds is established in ISO10814.