サイクロコンバータ・誘導電動機系の駆動システム

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The cycloconverter controllers authors have reported so far consist of 4 central process units and pheriferal devices. This time authors have manufactured new controller in which a personal computer and pheriferal devices are used. Pheriferal devices such as oscillator and phase locked loop was made of analog ones. This time authors have manufactured new devices which operate digitally. Also authors developed induction motor driving system in which two personal computers and pheriferal electronics devices were used. Motor speed detector has been completed with encorder and digital counter. There are two types of operations in cycloconverter. They are circulating current and circulating current-free operation. Both of them have merit and demerit. Therefore, authors proposed eclectic method which employs both merits. In this method, cycloconverter operates in former and latter by turns. With this method, cycloconverter generates as high as source frequency and shows stable operation. Although conventional controller generated same amplitude of three phases, authors improved the software to generate different amplitude of three phases. The reports authors have published so far describe the cycloconverter controller in which microcomputer has been used. But this report puts emphasis on the new controller and motor characteristics driven by cycloconverter. With this controller motor can be driven with variable frequencies and amplitudes. This controller can start motor with least starting current by changing frequencies and amplitudes proportional to motor speed.

サイクロコンバータ・誘導電動機系の駆動システム

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