芬蘭基于AC的驅動器制造商偉肯將在于2007年6月5日到7日在赫爾辛基舉行的PulPaper展覽會上出展全套產品。偉肯空氣和液體制冷AC制冷驅動器和普通DC總線產品零件適用于各種各樣的紙漿、造紙、紙板及紙加工需要。普通DC總線產品零件的其中一個優勢是偉肯專利的使用平行的（AFE）主動前端理論。 　　偉肯執行副總裁Mr Heikki Hiltunen說：“我們的全套設備能夠為我們在造紙業的用戶提供服務，同時我們為全球紙漿、造紙、紙板及紙加工行業的公司提供AC驅動器。我們提供的驅動器覆蓋面廣，每一個用于單泵驅動的設備都需要系統驅動器，從而使過程操作達到高效，高質，高可靠性?！? 　　偉肯AC驅動器的功率范圍為：0.25 kW – 5 MW.最高可達2 MW，此驅動器可用于空氣液體制冷，當設備功率高于2MW時，可用液體制冷。對于系統驅動器，偉肯擁有全套的針對普通DC總線系統的產品。這些模塊可用于根據過程和應用要求配置普通DC總線系統。普通DC總線家族產品受益于偉肯NXP,如其高I/O 配置性。 　　偉肯的同步平行變極器專利設備在設備間將環形電流最小化。同步是在測量值和內在調節器相互關系之上進行的。 　　同樣的一個安全的功能喪失，整合在偉肯NXP驅動器中，將在展會上展出。經EN-954-1證明的，目錄3，安全功能喪失可以用于保證驅動器在維護或維修期間不啟動。同樣地，在維修期間其可用于代替傳統的安全開關。這種功能提供簡單化的設計狀態，減少成本，提高用戶使用安全系數。 original text [COLOR=#708090]Vacon exhibits complete portfolio at PulPaper in Helsinki The Finland-based AC drives manufacturer Vacon will present its complete product portfolio at the PulPaper exhibition in Helsinki on 5-7 June, 2007. Vacon air- and liquid-cooled AC drives and common DC bus components are suited for the various needs of the pulp and paper segment. One of the advanced features of the Common DC bus components is the Vacon-patented methodology of using parallel Active Front-End （AFE） units. “Our complete product range allows us to serve all customers in the pulp and paper segment, and we have delivered AC drives to all major pulp and paper companies globally. Our drives cover a wide application area, everything from simple pump drives to demanding system drives, thus improving processes in terms of runnability, efficiency and quality,” says Mr Heikki Hiltunen, Executive Vice President, Vacon. Vacon AC drives are available in the power range of 0.25 kW – 5 MW. Up to 2 MW, units are available as air- or liquid-cooled versions; units above 2 MW are liquid-cooled. For system drives, Vacon has a complete range of products for the common DC bus systems, consisting of rectifiers and inverters. These modules can be used to configure a Common DC bus system according to process and application requirements. The Common DC bus product family is based on the benefits of the Vacon NXP, e.g. high I/O configurability and a wide range of communication alternatives. Common DC bus components are used for sectional drives in the pulp and paper, metals and many other industries. The Vacon-patented method of synchronizing parallel inverter （Active Front-End） units minimizes the circulating current between the units. Synchronization is based on the correlation between the measured values and internal modulator. Also a safe disable function, integrated in the Vacon NXP drives, will be presented at the exhibition. Certified according to EN-954-1, category 3, the safe disable function can be used to ensure that the drive will not start e.g. during maintenance or servicing of the machine. As such, it can be used to replace the conventional safety switch during mechanical maintenance. It cannot, however, be used for electrical maintenance. This function provides a simplified design phase, reduced costs and increased user safety. [/COLOR]