Patent ID: 8604733

Claim:
An electrical actuator ( 300 - 1100 ) comprising: a polyphase electrical machine ( 301 - 1101 ); a first and a second connection member ( 343 - 1143 , 344 - 844 ) for connection to one or two electrical power supply networks ( 346 - 1146 , 347 - 847 ); first and second buses ( 306 - 1106 , 307 - 1107 ) connected in parallel between the machine ( 301 - 1101 ) and each connection member ( 343 - 1143 , 344 - 844 ), the first and second buses ( 306 - 1106 , 307 - 1107 ) including respective first and second inverters ( 311 - 1111 , 331 - 1131 ) for applying frequency control to the machine ( 301 - 1101 ), each inverter ( 311 - 1111 , 331 - 1131 ) having a plurality of arms each provided with two controlled switches, each phase of the machine ( 301 - 1101 ) being connected both to the two switches of an arm of the first inverter ( 311 - 1111 ) and also to the two switches of an arm of the second inverter ( 331 - 1131 ); and connection and disconnection control means interposed between the buses ( 306 - 1106 , 307 - 1107 ) and each connection member, wherein the connection and disconnection control means comprises a first contactor ( 336 - 836 ) connecting the first bus ( 306 - 806 ) to the first connection member ( 343 - 843 ) and a second contactor ( 337 - 837 ) connecting the second bus ( 307 - 807 ) to the second connection member ( 344 - 844 ).