Phase-shift autotransformer, multi-pulse rectifier systems and fast charging

Abstract

The present disclosure relates to systems and configurations for phase-shift autotransformers and multi-pulse rectifiers. A phase-shift autotransformer includes a wiring configuration for first, second and third magnetic cores, the wiring configuration including primary input and phase-shift windings. The primary input windings are configured to provide a first and second primary input inductances, and phase-shift windings of the wiring configuration are configured to provide multiple inductances for each phase-shift winding. A multi-pulse rectifier is provided including a phase-shifting autotransformer, a diode bridge rectifier configuration coupled to output of the autotransformer and a filtering capacitor coupled to the diode bridge rectifier. Other embodiments are directed to use of the multi-use rectifier system with vehicle charging station, such as an Electric Vehicle Supply Equipment (EVSE).

What is claimed is: 
     
         1 . A method comprising:
 feeding an alternating current (AC) input to a wiring configuration of a phase-shift autotransformer to transform the AC input to 6-phase output voltage, the wiring configuration comprising:
 a first phase including:
 a first primary input winding; 
 a first phase-shift winding; and 
 a second phase-shift winding; 
 
 a second phase including:
 a second primary input winding; 
 a third phase-shift winding; and 
 a fourth phase-shift winding, wherein output of the first primary input winding is coupled to or between the third phase-shift winding and the fourth phase-shift winding; and 
 
 a third phase including:
 a third primary input winding, wherein output of the third primary input winding is coupled to or between the first phase-shift winding and the second phase-shift winding; 
 a fifth phase-shift winding; and 
 a sixth phase-shift winding, wherein output of the second primary input winding is coupled to or between the fifth phase-shift winding and the sixth phase-shift winding; 
 
   rectifying, by a rectifier, the 6-phase output voltage to direct current (DC) supply; and   providing the DC supply to a charging port, the charging port configured to use the DC supply to charge an electric vehicle electrically connected to the charging port.   
     
     
         2 . The method of  claim 1 , wherein feeding the AC input to the wiring configuration shifts a phase angle of the AC input by:
 providing, via the first primary input winding, a first primary input inductance to the AC input;   providing, via the second primary input winding, a second primary input inductance to the AC input; and   providing, via the third primary input winding, a third primary input inductance to the AC input.   
     
     
         3 . The method of  claim 1 , wherein feeding the AC input to the wiring configuration:
 provides, via the first phase-shift winding, a first inductance to the AC input;   provides, via the second phase-shift winding, a second inductance to the AC input;   provides, via the third phase-shift winding, a third inductance to the AC input;   provides, via the fourth phase-shift winding, a fourth inductance to the AC input;   provides, via the fifth phase-shift winding, a fifth inductance to the AC input; and   provides, via the sixth phase-shift winding, a sixth inductance to the AC input.   
     
     
         4 . The method of  claim 1 , wherein:
 the first phase-shift winding and the second phase-shift winding provide two voltage components of the 6-phase voltage output;   the third phase-shift winding and the fourth phase-shift winding provide two voltage components of the 6-phase voltage output; and   the fifth phase-shift winding and the sixth phase-shift winding provide two voltage components of the 6-phase voltage output.   
     
     
         5 . The method of  claim 1 , further comprising, prior to providing the DC supply to the charging port, feeding the DC supply to a filtering capacitor. 
     
     
         6 . The method of  claim 1 , wherein the rectifier comprises a diode bridge rectifier. 
     
     
         7 . The method of  claim 6 , wherein:
 output of the first phase-shift winding is coupled to or between a first diode and a second diode of the diode bridge rectifier;   output of the second phase-shift winding is coupled to or between a third diode and a fourth diode of the diode bridge rectifier;   output of the third phase-shift winding is coupled to or between a fifth diode and a sixth diode of the diode bridge rectifier;   output of the fourth phase-shift winding is coupled to or between a seventh diode and an eighth diode of the diode bridge rectifier;   output of the fifth phase-shift winding is coupled to or between a ninth diode and a tenth diode of the diode bridge rectifier; and   output of the sixth phase-shift winding is coupled to or between an eleventh diode and a twelfth diode of the diode bridge rectifier.   
     
     
         8 . The method of  claim 1 , wherein the phase-shift autotransformer comprises a five-column core comprising a first magnetic core associated with the first phase of the wiring configuration, a second magnetic core associated with the second phase of the wiring configuration, and a third magnetic core associated with the third phase of the wiring configuration. 
     
     
         9 . The method of  claim 1 , wherein the phase-shift autotransformer comprises an E-type core comprising a first magnetic core associated with the first phase of the wiring configuration, a second magnetic core associated with the second phase of the wiring configuration, and a third magnetic core associated with the third phase of the wiring configuration. 
     
     
         10 . The method of  claim 1 , wherein the phase-shift autotransformer comprises a capacity rating less than or equal to 10 percent. 
     
     
         11 . A charging station comprising:
 a phase-shift autotransformer configured to transform an alternating current (AC) input to a 6-phase output voltage, the phase-shift autotransformer comprising a wiring configuration that includes:
 a first phase comprising:
 a first primary input winding; 
 a first phase-shift winding; and 
 a second phase-shift winding; 
 
 a second phase comprising:
 a second primary input winding; 
 a third phase-shift winding; and 
 a fourth phase-shift winding, wherein output of the first primary input winding is coupled to or between the third phase-shift winding and the fourth phase-shift winding; and 
 
 a third phase comprising:
 a third primary input winding, wherein output of the third primary input winding is coupled to or between the first phase-shift winding and the second phase-shift winding; 
 a fifth phase-shift winding; and 
 a sixth phase-shift winding, wherein output of the second primary input winding is coupled to or between the fifth phase-shift winding and the sixth phase-shift winding; 
 
   a rectifier configured to rectify the 6-phase output voltage transformed by the phase-shift autotransformer to direct current (DC) supply; and   a charging port configured to electrically connect to an electric vehicle and provide the DC supply to the electric vehicle.   
     
     
         12 . The charging station of  claim 11 , wherein:
 the first primary input winding is configured to provide a first primary input inductance to the AC input;   the second primary input winding is configured to provide a second primary input inductance to the AC input; and   the third primary input winding is configured to provide a third primary input inductance to the AC input.   
     
     
         13 . The charging station of  claim 11 , wherein:
 the first phase-shift winding provides a first inductance to the AC input;   the second phase-shift winding provides a second inductance to the AC input;   the third phase-shift winding provides a third inductance to the AC input;   the fourth phase-shift winding provides a fourth inductance to the AC input;   the fifth phase-shift winding provides a fifth inductance to the AC input; and   the sixth phase-shift winding provides a sixth inductance to the AC input.   
     
     
         14 . The charging station of  claim 11 , wherein:
 the first phase-shift winding and the second phase-shift winding provide two voltage components of the 6-phase voltage output;   the third phase-shift winding and the fourth phase-shift winding provide two voltage components of the 6-phase voltage output; and   the fifth phase-shift winding and the sixth phase-shift winding provide two voltage components of the 6-phase voltage output.   
     
     
         15 . The charging station of  claim 11 , further comprising a filtering capacitor configured to feed the DC supply to the charging port. 
     
     
         16 . The charging station of  claim 11 , wherein the rectifier comprises a diode bridge rectifier. 
     
     
         17 . The charging station of  claim 16 , wherein:
 output of the first phase-shift winding is coupled to or between a first diode and a second diode of the diode bridge rectifier;   output of the second phase-shift winding is coupled to or between a third diode and a fourth diode of the diode bridge rectifier;   output of the third phase-shift winding is coupled to or between a fifth diode and a sixth diode of the diode bridge rectifier;   output of the fourth phase-shift winding is coupled to or between a seventh diode and an eighth diode of the diode bridge rectifier;   output of the fifth phase-shift winding is coupled to or between a ninth diode and a tenth diode of the diode bridge rectifier; and   output of the sixth phase-shift winding is coupled to or between an eleventh diode and a twelfth diode of the diode bridge rectifier.   
     
     
         18 . The charging station of  claim 11 , wherein the phase-shift autotransformer comprises a five-column core comprising a first magnetic core associated with the first phase of the wiring configuration, a second magnetic core associated with the second phase of the wiring configuration, and a third magnetic core associated with the third phase of the wiring configuration. 
     
     
         19 . The charging station of  claim 11 , wherein the phase-shift autotransformer comprises an E-type core comprising a first magnetic core associated with the first phase of the wiring configuration, a second magnetic core associated with the second phase of the wiring configuration, and a third magnetic core associated with the third phase of the wiring configuration 
     
     
         20 . The charging station of  claim 11 , wherein the phase-shift autotransformer comprises a capacity rating less than or equal to 10 percent.