New Concepts for AC Motor Drives Requiring a Wide Speed Range

需要宽速度范围的交流电机驱动新概念

• 批准号: 9510115
• 负责人: Thomas Lipo
• 金额: $ 18万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-10-01 至 1998-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9510115&HistoricalAwards=false
• 关键词: New; Concepts; AC; Motor; Drives

9510115 Lipo A frequent requirement in motor drive applications such as spindle drives, steel plants, and paper making machinery is to operate at constant poser over a wide speed range. Constant power operation is particularly important in the field of electric traction which covers a wide range of applications ranging from locomotives to electric vehicles. At present, field weakening techniques are used to widen the speed range of ac machines of conventional design, but as the desired speed range for constant power operation increases beyond twice the normal (or "rated") speed, the motor size and weight increases dramatically for both induction and permanent magnet type machines. In the proposed project, a comprehensive analytical, simulation, design and experimental program is set forth to develop ac induction and synchronous machines which possess the capability of an extended "constant power" field weakening range without need for an oversized machine. Pole changing of the stator winding of both types of machines is accomplished by proper control of the currents fed to the phases of a specially designed stator winding using only conventional pulse width modulated inverters. Hence, the stator pole changing mechanism does not necessarily introduce any additional switches, contractors or solid state (or passive) components to achieve its task. The goal of achieving extended field weakening range will be accomplished by means of innovative concepts of stator and rotor design which will enable these new machines to be roughly 30 to 50% the size and weight of conventional ac machines presently used for this same purpose. ***

在电机驱动应用中，如主轴驱动、钢铁厂和造纸机械，一个常见的要求是在很宽的速度范围内以恒定的功率运行。恒功率运行在电力牵引领域尤为重要，它涵盖了从机车到电动车辆的广泛应用。目前，磁场减弱技术被用于扩大传统设计的交流电机的速度范围，但随着恒功率运行所需的速度范围增加到正常（或“额定”）速度的两倍以上，感应和永磁型电机的电机尺寸和重量都急剧增加。在本项目中，提出了一个综合的分析、仿真、设计和实验方案，以开发具有扩展“恒功率”磁场减弱范围的交流感应和同步电机，而不需要超大的电机。这两种类型的机器的定子绕组的变极是通过适当控制电流馈送到一个专门设计的定子绕组的相位，只使用常规脉宽调制逆变器。因此，定子换极机构不必引入任何额外的开关，承包商或固态（或无源）元件来实现其任务。实现扩展磁场减弱范围的目标将通过定子和转子设计的创新概念来实现，这将使这些新机器的尺寸和重量大约是目前用于相同目的的传统交流机器的30至50%。＊＊＊