公开(公告)号：US3559028A

公开(公告)日：1971-01-26

申请号：US3559028D

申请日：1968-11-15

Applicant: BORG WARNER

Inventor： STUDTMANN GEORGE H ,  YAREMA RAYMOND J

IPC: H02M3/155 ,  H02M3/10 ,  H02M3/337 ,  H02M3/22

CPC classification number: H02M3/10

Abstract: A HIGH-POWER DC-TO-DC CONVERTER (OR "CHOPPER") SYSTEM PROVIDES AN INPUT VOLTAGE V1 OF SUBSTANTIALLY CONSTANT LEVEL TO A CHOPPER WHICH INCLUDES A SWITCH. THE OPENED AND CLOSED TIMES OF THE SWITCH ARE CONTROLLED TO PASS AN OUTPUT VOLTAGE VO OF VARIABLE MAGNITUDE THROUGH A FILTER TO A LOAD. A CONTROL CIRCUIT IS CONNECTED TO ACTUATE THE CHOPPER OVER A VARIABLE FREQUENCY RANGE, AND PRACTICAL OPERATING CONDITIONS SUCH AS HEATING OF THE SWITCH IMPOSE AN UPPER LIMIT ON THIS FREQUENCY RANGE. THE CHOPPER IS OPERATED SUCH THAT THE OUTPUT VOLTAGE VO IS ONE-HALF THE INPUT VOLTAGE VI AT THE MAXIMUM OPERATING FREQUENCY OF THE CHOPPER. TO PROVIDE LEVELS OF OUTPUT VOLTAGE VO LESS THAN HALF VI, THE FREQUENCY IS GRADUALLY REDUCED AS THE CHOPPER ON DWELL TIME IS MAINTAINED APPROXIMATELY CONSTANT OR ALLOWED TO DECREASE. TO PROVIDE LEVELS OF OUTPUT VOLTAGE VO GREATER THAN ONE-HALF THE INPUT VOLTAGE VI, THE CHOPPER OPERATING FREQUENCY IS GRADUALLY REDUCED AS THE CHOPPER OFF DWELL TIME IS MAINTAINED SUBSTANTIALLY CONSTANT OR ALLOWED TO DECREASE. CIRCUIT DETAILS OF A CONTROL CIRCUIT FOR OPERATING THE CHOPPER ACCORDING TO THIS METHOD ARE SET OUT.

公开(公告)号：US3343068A

公开(公告)日：1967-09-19

申请号：US46139565

申请日：1965-06-04

Applicant: BORG WARNER

Inventor： STUDTMANN GEORGE H ,  RICHARD SHEMANSKE

IPC: H02M7/515

CPC classification number: H02M7/515