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Control of Surface Mounted Permanent Magnet Motors with Special Application to Fractional-Slot Motors with Concentrated Windings.

DE2008931748

Publication Date	2007
Personal Author	McKeever, J. W.; Patil, N.; Lawler, J.
Page Count	59
Abstract	A 30 pole, 6 kW, and 6000 maximum revolutions per minute (rpm) prototype of the permanent magnet synchronous motor (PMSM) with fractional-slot concentrated windings (FSCW) has been designed, built, and tested at the University of Wisconsin at Madison (UWM). This machine has significantly more inductance than that of regular PMSMs. The prototype was delivered in April 2006 to the Oak Ridge National Laboratory (ORNL) for testing and development of a controller that will achieve maximum efficiency. In advance of the test/control development effort, ORNL has used the PMSM models developed over a number of previous studies to study how steady state performance of high inductance PMSM machines relates to control issues. This report documents the results of this research. The amount of inductance that enables the motor to achieve infinite constant power speed ratio (CPSR) is given by L(sub (infinity)) = E(sub b)/(Omega)(sub b)I(sub R), where E(sub b) is the root-mean square (rms) magnitude of the line-to-neutral back-electromotive force (emf) at base speed, (Omega)(sub b) is the base speed in electrical radians per second, and I(sub R) is the rms current rating of the motor windings. The prototype machine that was delivered to ORNL has about 1.5 times as much inductance as a typical PMSM with distributed integral slot windings.
Keywords	Electric motors Permanent magnets Windings Armatures Control systems Design Fabrication Inductance Inverters Performance evaluation
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Oak Ridge National Lab., TN.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200825
Contract Number	DE-AC05-00OR22725

Control of Surface Mounted Permanent Magnet Motors with Special Application to Fractional-Slot Motors with Concentrated Windings.

Control of Surface Mounted Permanent Magnet Motors with Special Application to Fractional-Slot Motors with Concentrated Windings.
DE2008931748

Publication Date	2007
Personal Author	McKeever, J. W.; Patil, N.; Lawler, J.
Page Count	59
Abstract	A 30 pole, 6 kW, and 6000 maximum revolutions per minute (rpm) prototype of the permanent magnet synchronous motor (PMSM) with fractional-slot concentrated windings (FSCW) has been designed, built, and tested at the University of Wisconsin at Madison (UWM). This machine has significantly more inductance than that of regular PMSMs. The prototype was delivered in April 2006 to the Oak Ridge National Laboratory (ORNL) for testing and development of a controller that will achieve maximum efficiency. In advance of the test/control development effort, ORNL has used the PMSM models developed over a number of previous studies to study how steady state performance of high inductance PMSM machines relates to control issues. This report documents the results of this research. The amount of inductance that enables the motor to achieve infinite constant power speed ratio (CPSR) is given by L(sub (infinity)) = E(sub b)/(Omega)(sub b)I(sub R), where E(sub b) is the root-mean square (rms) magnitude of the line-to-neutral back-electromotive force (emf) at base speed, (Omega)(sub b) is the base speed in electrical radians per second, and I(sub R) is the rms current rating of the motor windings. The prototype machine that was delivered to ORNL has about 1.5 times as much inductance as a typical PMSM with distributed integral slot windings.
Keywords	Electric motors Permanent magnets Windings Armatures Control systems Design Fabrication Inductance Inverters Performance evaluation
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Oak Ridge National Lab., TN.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200825
Contract Number	DE-AC05-00OR22725