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An interior permanent magnet synchronous machine drive exhibits an inherent wide speed range capability. In order to exploit this peculiar characteristic while assuring the lowest power losses, a proper control algorithm has to be used. In particular, as long as the required voltage is below the limit imposed by the available DC bus, the control algorithm must command the maximum torque per ampere...
This paper presents a comparative analysis of various interior permanent magnet (IPM) machines and a surface permanent magnet (SPM) machine designed for a commuter train. The different IPM machines are characterized by a different rotor geometry and volume of permanent magnets. The traction requirements fix the maximum machine volume and the back electromotive force at uncontrolled generator operations...
This paper presents rib design in the rotor of IPMSM to increase maximum power in the field weakening region without variation of PM usage, conductor and size. Rib design is critical issue in the design of IPMSM due to leakage flux of permanent magnet and dominated by mechanical strength, therefore structural analysis should be conducted and minimum thickness should be selected. Rib design also affects...
The real-time torque calculation and dynamic modeling have been the difficulties in the motion control of the permanent magnet spherical stepper motor. Based on the presented continuous trajectory tracking control mode, a simplified torque calculation method and the non-linear system dynamic model have been proposed. The perturbation of the system parameters, the model error and the external disturbance...
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