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About product and suppliers:
        Alibaba.com offers 182,286 speed controller products. About 6% of these are ac motor, 6% are inverters & converters, and 3% are motor controller. 

A wide variety of speed controller options are available to you, such as dc motor, ac motor, and stepper motor. You can also choose from free samples, paid samples. 

There are 181,545 speed controller suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Taiwan, which supply 99%, 1%, and 1% of speed controller respectively. 

Speed controller products are most popular in North America, Domestic Market, and Southeast Asia. 

You can ensure product safety by selecting from certified suppliers, including 51,489 with ISO9001, 24,308 with Other, and 10,836 with ISO14001 certification.