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    • 93. 发明授权
    • Electric start control of a VSCF system
    • VSCF系统的电启动控制
    • US5029263A
    • 1991-07-02
    • US423941
    • 1989-10-19
    • Gregory I. Rozman
    • Gregory I. Rozman
    • F02N11/04
    • F02N11/04
    • The problem of providing aircraft engine starting is solved with an engine start control apparatus operating a generator (12) as a synchronous motor. The motor (12) receives power from a main inverter (46) and an excitation inverter (48) through an exciter (14) operating as a rotary transformer. These inverters (46, 48) are controlled by a control unit (22) which provides for constant power characteristics in the field weakening range. The control unit (22) includes a pulse width modulation (PWM) generator (100) which is responsive to a voltage command (102) and a commutation command (104) to develop switching signals (88) for controlling the switches (S1-S6) in the main inverter (46). The voltage command (102) is used to vary the duty cycle of the PWM signals. The commutation angle command (104) is used to control the timing of the PWM signals. The voltage command (102) and the commutation angle command (104) are controlled using closed loop current control.
    • 提供飞机发动机启动的问题由作为同步电动机操作发电机(12)的发动机起动控制装置来解决。 电动机(12)通过作为旋转变压器工作的励磁机(14)从主逆变器(46)和励磁变换器(48)接收电力。 这些逆变器(46,48)由控制单元(22)控制,该控制单元在弱磁区域中提供恒定的功率特性。 控制单元(22)包括响应于电压指令(102)和换向指令(104)的脉冲宽度调制(PWM)发生器(100),以产生用于控制开关的切换信号(88)(S1-S6 )在主逆变器(46)中。 电压指令(102)用于改变PWM信号的占空比。 换向角指令(104)用于控制PWM信号的定时。 使用闭环电流控制来控制电压指令(102)和换向角度指令(104)。
    • 94. 发明授权
    • VSCF start system with precision voltage
    • VSCF起动系统具有精确的电压
    • US4937508A
    • 1990-06-26
    • US351045
    • 1989-05-12
    • Gregory I. Rozman
    • Gregory I. Rozman
    • F02N11/04
    • F02N11/04
    • The problem of obtaining precision control of a synchronous motor is solved in an engine start control which utilizes a fundamental wave component as a feedback value. The motor receives power from a main inverter and an excitation inverter. The inverters are controlled by a control unit which includes a pulse width modulation generator which is responsive to a voltage command and a commutation command to develop switching signals for controlling the switches in the main inverter. At speeds above a preselected minimum speed, the commutation angle command and the voltage command are developed in a closed loop manner responsive to a feedback signal representing the fundamental output of the inverter.
    • 在利用基波分量作为反馈值的发动机起动控制中解决了获得同步电动机的精度控制的问题。 电机从主变频器和励磁变频器接收电力。 逆变器由控制单元控制,该控制单元包括响应于电压指令的脉冲宽度调制发生器和换向指令,以开发用于控制主逆变器中的开关的开关信号。 在高于预选的最小速度的速度下,响应于表示逆变器的基本输出的反馈信号,以闭环方式产生换向角指令和电压指令。
    • 98. 发明申请
    • MOTOR DRIVE SYSTEM EMPLOYING AN ACTIVE RECTIFIER
    • 使用活动整流器的电机驱动系统
    • US20130181654A1
    • 2013-07-18
    • US13352793
    • 2012-01-18
    • Gregory I. RozmanThomas A. DuclosDuane A. James
    • Gregory I. RozmanThomas A. DuclosDuane A. James
    • H02P27/00
    • H02M5/4585H02M1/12H02P27/085H02P2201/03H02P2201/15
    • An active rectifier controller controls operation of an active rectifier employed in a power conversion system that supplies a direct current (DC) output to an inverter that converts the DC output to an AC output supplied to an AC motor. The active rectifier controller includes a field-oriented control (FOC) controller that monitors an alternating current (AC) input currents provided to the active rectifier, the DC output provided to the inverter, and speed of the AC motor. The FOC controller selects a reference DC output value based on the speed of the AC motor and compares the monitored DC output to the reference DC output as part of the FOC control algorithm used to generate control signals. A PWM signal generator generates PWM signals for controlling the active rectifier based on the control signals.
    • 有源整流器控制器控制在将直流输出转换为提供给交流电动机的交流输出的逆变器提供直流(DC)输出的电力转换系统中使用的有源整流器的操作。 有源整流器控制器包括一个磁场定向控制(FOC)控制器,用于监控提供给有源整流器的交流(AC)输入电流,提供给逆变器的直流输出以及交流电动机的速度。 FOC控制器基于交流电机的速度选择参考直流输出值,并将监控的直流输出与参考直流输出进行比较,作为用于产生控制信号的FOC控制算法的一部分。 PWM信号发生器根据控制信号生成用于控制有源整流器的PWM信号。