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Various applications need an electric machine that can provide a wide range of torque over a broad range of rotation speed and temperature. Dynamic testing, where the machine acceleration is compared to the deceleration slope, allows to scan through a wide scope of operation points with insignificant temperature rise. Therefore, the goal of this paper is to analyse the consistency of the rapid experimental...
The I/f control is an open-loop method of control of PM machines in which the reference current is set proportionally to the electrical frequency while the voltage is generated through a current regulator. A realization of the method for control of a very high-speed synchronous PM motor is presented in the paper. To add necessary damping to the system, the controller uses modulation of the electrical...
A rotor of a buried permanent magnet machine can be constructed reliably by using magnets to support the rotor structure against centrifugal forces. In this work, a rotor solution with V- shape magnets in every pole are replaced with a rotor solution where every second pole are geometrically supported by the rest of the poles with the magnets. Effect of the replacement of the rotor is compared by...
The permanent magnet synchronous machine with an external rotor is the most important device for high performance electrical drive systems in particular for hybrid electric vehicles. The paper presents finite element analyses of a such a machine in terms of a comparison of both Y- and Δ-connected stator windings. The influence on the most important design parameters such as electromagnetic torque...
This paper compares SPMSM and IPMSM under high flux density condition. Both machines use same stator construction and same rotor geometry, also have similar open circuit voltages. No load characteristics which include iron loss are compared and output power characteristics which include efficiency and iron, eddy current loss are described.
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