High Speed Water-Cooled Permanent Magnet Motor for Pulse Alternator-Based Pulse Power Systems
High Speed Water-Cooled Permanent Magnet Motor for Pulse Alternator-Based Pulse Power Systems
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DOI：
10.1109/elt.2008.101
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发表时间：
2008-06
期刊：
影响因子：
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通讯作者：
J. E. King;R. M. Kobuck;J. Repp
中科院分区：
文献类型：
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作者：
J. E. King;R. M. Kobuck;J. Repp
基于脉冲交流发电机的电磁轨道炮脉冲电源系统将轨道炮供电所需的能量存储为旋转构件中存储的机械惯性能。脉冲交流发电机（PA）将储存的惯性能量转换成电能，供应给轨道炮终端。系统损耗和传递给轨道炮弹丸的能量通过降低运行速度来减少脉冲交流发电机存储的惯性能量。脉冲交流发电机需要一个充电机构，以加速转子的交流发电机所需的速度，提供机械储存的能量。这通常是通过连接在交流发电机轴上的电机来完成的。本文介绍了为高速脉冲交流发电机加速而设计的高速水冷永磁同步电动机的设计、制造和初步试验。充电电机的设计目的是将脉冲交流发电机从零转速加速到交流发电机的额定转速，并在脉冲放电后将交流发电机加速回额定转速。两个PM电机也用于同步两个独立的并联脉冲交流发电机之前，放电进入轨道枪负载。PM电机直接连接到PA轴，旨在最大限度地减少组件的轴向足迹。电机在连续占空比下运行，需要对定子组件进行水冷却，对转子进行风冷。永磁同步电机由变频、变电压电子驱动器驱动，以恒转矩方式运行。
Pulse alternator-based pulse power systems for electromagnetic rail guns store the required energy for powering the rail gun as stored mechanical inertial energy in the rotating member. The pulse alternator (PA) converts the stored inertial energy into electrical energy that is supplied to the rail gun terminals. The losses in the system and energy delivered to the rail gun projectile reduce the stored inertial energy of the pulse alternator by reducing the operating speed. Pulse alternators require a charging mechanism to accelerate the rotor of the alternator to the desired speed, providing the mechanical stored energy. This is generally accomplished by a motor attached to the alternator shaft. This paper describes the design, manufacture and initial testing of a high speed, water- cooled permanent-magnet (PM) synchronous motor specially designed to accelerate a high speed pulse alternator. The charging motor has been designed to accelerate the pulse alternator from zero speed to full rated alternator speed and to accelerate the alternator back to rated speed after the pulse discharge. Two PM motors are also used to synchronize two separate paralleled pulse alternators prior to discharge into a rail gun load. The PM motor is directly attached to the PA shaft and designed to minimize the axial footprint of the assembly. The motor is operated in a continuous duty cycle which requires water cooling of the stator assembly and air cooling of the rotor. The PM synchronous motor is powered by a variable-frequency, variable voltage electronic drive and operated in a constant torque mode.