The Iron Loss Calculation Of HSPM Machine And Experiment Test Research

The high-speed permanent magnet (PM) machine has been widely investigated since it has small size, high efficiency and power density. And it is used widely, such as high speed compressor, flywheel for energy storage. But the high speed permanent magnet machine has a lot of technical difficulties, such as electromagnetic and structure designs of rotor, analysis of rotor strength and rigidity, protection of permanent magnets, structure and control method of magnetically suspension bearings, calculation of additional losses caused by high frequency and high speed, prediction of temperature rise and selection of cooling mode. In addition, the high temperature can make the permanent magnet demagnetized. So it is especially important to calculate the power loss of the machine and ventilation accurately.It is very difficult to calculate the iron loss of stator accurately, because of the high frequency. So some theoretical study and experimental verification have been done. Thefollowing areas of study are main topics.The iron loss calculation method of traditional machine is not fit to high-speed machinebecause of the high frequency. It is very necessary to test the loss coefficient for silicon steel in order to calculate the stator loss accurately. In the high frequency, general instrument measurement is error, and a dedicated power analyzer is very expensive. To solve this problem, a study based on digital oscilloscopes is given to test loss of silicon steel units quality in the high-frequency (400 Hz). And the viability of the method is tested. Experimental results show that this method is more accurate, and can meet the practical engineering applications. It is very useful.The traditional model of silicon steel sheet loss calculation and the separation of iron loses calculation model based on Bertotti principle is researched. Their parameters are calculated. Based on the finite element software Magnet, two iron consumption model calculation methods were analyzed. This method is more accurate than traditional analytical method. High-speed motor stator have different slots. Which one is better, minimal slot or maximal slot, is studied. The impact of the stator slotted is analyzed, using the finite element method. Less stator teeth with tooth notching structure were suggested which structure can reduce the eddy current losses and rotor torque ripple at the same time.