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1. 发明授权

US4326152A System for controlling the in-phase operation of a pair of motors 失效
标题翻译：用于控制一对电机的同相操作的系统
公开(公告)号：US4326152A
公开(公告)日：1982-04-20
申请号：US85343
申请日：1979-10-15
申请人： James M. Blackburn , Douglas C. Paschall
发明人： James M. Blackburn , Douglas C. Paschall
IPC分类号： H02P5/52 , H02P5/46 , B65H57/28
CPC分类号： H02P5/56
摘要： The operation of a first motor and a second motor generates first and second frequency signals, respectively, which are fed to a phase lock loop (59) for phase comparison. A tri-level detection circuit (61) develops an output signal in response to the phase relationship between the first and second frequency signals. The first frequency signal is converted to a voltage signal by a converter (63) which is fed to an amplifier (64). A feedback circuit (66) is connected across the amplifier and includes several selectable levels of impedance. A switching network (62) responds to the output signal of the detection circuit (61), and thereby in response to the phase relationship between the first and second frequency signals, to connect one of the impedance levels of the feedback circuit (66) across the amplifier circuit (64). The amplified voltage signal is fed to a controller within a motor drive (72) for the second motor to control the speed of the second motor and insure in-phase operation thereof with the first motor.
摘要翻译：第一电动机和第二电动机的操作分别产生第一和第二频率信号，其被馈送到用于相位比较的锁相环（59）。三电平检测电路（61）响应于第一和第二频率信号之间的相位关系产生输出信号。第一频率信号由馈送到放大器（64）的转换器（63）转换成电压信号。反馈电路（66）跨过放大器连接并且包括若干可选择的阻抗级。交换网络（62）响应于检测电路（61）的输出信号，从而响应于第一和第二频率信号之间的相位关系，将反馈电路（66）的阻抗电平之一跨过放大器电路（64）。放大的电压信号被馈送到用于第二电动机的电动机驱动器（72）内的控制器，以控制第二电动机的速度，并确保与第一电动机同步运行。

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