Frequency changer

• Main Authors: ZHU DONGHAI, SHAO HAIXIA
• Format: Patent
• Language: Chinese; English
• Published: 05.11.2008
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERATION; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; PRINTED CIRCUITS

The utility model discloses a transducer, which comprises a transducer body and is characterized in that the transducer is arranged in a sealing shell (4) with anti-conduction mill dust function, wherein, a high-power heat conduction backboard (2) and a semiconductor refrigeration unit (1) are arranged at the back of the shell (4); the high-power heat conduction backboard (2) is arranged at a position where a high-power original production is positioned at the shell by a contact flange; a lead-in terminal (3) is sealed and extracted from a terminal block of the transducer in the shell. The transducer has the advantages that not only the heat emission problem of the transducer is well solved, but the sealing problem of the transducer is solved. Especially, as the transducer can be applied to a multi-function overhead traveling crane, the parking time of the traveling crane can be greatly reduced; the using efficiency of the multi-function overhead traveling crane is improved; safe production is guaranteed; the