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About product and suppliers:
        Alibaba.com offers 13,324 variable speed drive products. About 65% of these are inverters & converters, 1% are usb flash drives. 

A wide variety of variable speed drive options are available to you, such as triple, single, and multiple. You can also choose from dc/ac inverters, dc/dc converters. As well as from 1 - 50w, 1 - 200kw. And whether variable speed drive is free samples, or paid samples. 

There are 13,740 variable speed drive suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and India, which supply 96%, 2%, and 1% of variable speed drive respectively. 

Variable speed drive products are most popular in Mid East, South Asia, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 8,953 with ISO9001, 2,607 with ISO14001, and 2,410 with OHSAS18001 certification.