公开(公告)号：US5325042A

公开(公告)日：1994-06-28

申请号：US11022

申请日：1993-01-29

Applicant: Muthu K. Murugan

Inventor： Muthu K. Murugan

IPC: F02N11/04 ,  F02N11/00

CPC classification number: F02N11/04 ,  F05B2220/50 ,  H02P2201/07

Abstract: A turbine engine start system accepts either AC or DC and performs power conversion for multiple functions such as starting an AC synchronous generator as a synchronous motor without degradation of input power quality and with minimal generation of EMI. The system utilizes common magnetic components and common semiconductor transistors and rectifiers within its four major subcircuits. The four major subcircuits include a transformer rectifier, a boost converter, a voltage source inverter and a field excitation controller.

Abstract translation: 涡轮发动机启动系统接受交流或直流，并执行多种功能的功率转换，例如启动交流同步发电机作为同步电机，而不会降低输入电源质量，并以最小的EMI产生。 该系统在其四个主要子电路中使用普通磁性元件和公共半导体晶体管和整流器。 四个主要子电路包括变压器整流器，升压转换器，电压源逆变器和励磁励磁控制器。

公开(公告)号：US4123692A

公开(公告)日：1978-10-31

申请号：US735609

申请日：1976-10-26

Applicant: Thomas P. Gilmore ,  Frederick A. Stich

Inventor： Thomas P. Gilmore ,  Frederick A. Stich

IPC: H02M3/158 ,  H02P27/08 ,  H02P5/40 ,  H02P7/62

CPC classification number: H02P27/08 ,  H02M3/158 ,  H02M2001/007 ,  H02P2201/07 ,  H02P27/047

Abstract: An adjustable speed AC electric motor drive has a static inverter energized from a unidirectional power source through a semiconductor series chopper and eliminates a filter between chopper and inverter and controls the fundamental inverter output frequency as a function of an analog speed reference signal and also pulse width modulates the series chopper at a constant frequency as a function of the speed reference signal and synchronizes the series chopper to the fundamental inverter freqency to provide variable voltage and variable frequency power to the motor. The drive has a shunt chopper at the output of the series chopper and switches it to the opposite conductive state from the series chopper so that it coacts with the feedback diodes to form substantially continuous, low impedance, bidirectional free-wheeling paths for motor current and provides constant harmonic content current to the motor with reduced ripple.

Abstract translation: 可调速AC电动机驱动器具有通过半导体串联斩波器从单向电源供电的静态逆变器，并且消除斩波器和逆变器之间的滤波器，并且将基本的反相器输出频率控制为模拟速度参考信号的函数，并且还将脉冲宽度 作为速度参考信号的函数以恒定频率调制串联斩波器，并将串联斩波器与基波逆变器频率同步，为电机提供可变电压和变频功率。 驱动器在串联斩波器的输出端具有分流斩波器，并将其切换到与串联斩波器相反的导通状态，使其与反馈二极管共同形成用于电动机电流的基本连续的低阻抗双向续流路径， 为电机提供恒定谐波含量电流，纹波减小。