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UNRESTRICTED FREQUENCY CHANGER SYSTEM HAVING IMPROVED HARMONIC CHARACTERISTIC AND ADJUSTABLE FREQUENCY AC MOTOR DRIVE USING SUCH A SYSTEM
UNRESTRICTED FREQUENCY CHANGER SYSTEM HAVING IMPROVED HARMONIC CHARACTERISTIC AND ADJUSTABLE FREQUENCY AC MOTOR DRIVE USING SUCH A SYSTEM
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机译:使用这种系统的谐波特性和可调节的交流电动机驱动器得到改善的不受限制的频率变化系统
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摘要
In a static frequency changer controlled by adjusting the time of conduction of the bilateral switching units forming static converters, the time of conduction is split into n time intervals of respective subdurations adding up to be equivalent to the effective time of conduction of the controlled switching unit, and such subdurations are spread and distributed throughout the time period of control of the switching unit both within the original switching pattern of each converter and between the effective times of conduction of the respective converters, thereby to minimize harmonic distortion of the input supply current of the frequency changer.
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