1 34. 2  34 Converting AC to DC Thyristor A primary function of a DC drive, such as the SIMOREG 6RA70 DC MASTER, is to convert AC voltage into a variable DC voltage. 3  It is necessary to vary to DC voltage in order to control the speed of a DC motor. 4  A thyristor is one type of device commonly used to convert AC to DC. DC motors were the first practical device to convert electrical energy into mechanical energy. 2  DC motors, coupled with DC drives such as the Siemens SIMOREG 6RA70, have been widely used in industrial drive applications for years, offering very precise control.
Cerissa /ce-ris-sa/ [3 sylls.] as a girls' name. Cerissa's roots are English and French, and the name Cerissa means cherry. Cerissa is an alternate spelling of Cerise (English, French): modern coinage from French cerise. Compare surname Christa.
Erica /er-i-ca/ [3 sylls.] as a girls' name is pronounced AIR-a-ka. It is of Old Norse origin, and the meaning of Erica is complete ruler .Latinate feminine form of Eric, and also a flower name, as the Latin word erica means  heather . Scandinavian name revived in the 19th century.rica is a very popular first name for females (#169 out of 4276, Top 4%) but a rare last name for both adults and children. (2000 U.S. Census).