发明名称 Three-phase A-C speed control for variable torque motor
摘要 A three-phase A-C speed controller for small integral and fractional horsepower motors includes a phase locked loop comprised principally of a phase comparator and voltage controlled oscillator to generate phase delayed trigger signals for energizing the windings of a three-phase A-C motor. A pair of shift registers are cascaded with a flip-flop to generate the 60 DEG phase delay between phases as is necessary in a three-phase system.
申请公布号 US4940927(A) 申请公布日期 1990.07.10
申请号 US19850770719 申请日期 1985.08.29
申请人 CENTURY ELECTRIC, INC. 发明人 FISHER, MARVIN J.
分类号 H02P23/00 主分类号 H02P23/00
代理机构 代理人
主权项
地址