Alternator-rectifier unit with phase winding and rectifier sets subject to series-parallel switching

Alternator-rectifier electric current generator system comprising

• a multi-phase alternator having a plurality of separate multi-phase windings (11, 12), a single exciter winding (15), a plurality of multi-phase rectifier assemblies (13, 14) respectively supplied by said multi-phase windings;
• switching means for switching the respective outputs (21, 27 and 25, 29) of said rectifier assemblies (13, 14) selectively into series connection and into parallel connection including first and second switches (47, 48) subject to a common control (55), said first switch being a transfer switch with a switching arm (45) and first (43) and second (44) fixed contacts, said second switch having first (46) and second (49) contacts which are closed when said switching arm (45) makes contact with said first contact of said first switch;
• and wherein said first fixed contact (43) of said first transfer switch (47) is connected to the positive terminal (21) of a first one (13) of said rectifier assemblies (13, 14) and also to the positive terminal (26) of the generator circuit output, the switching arm (45) of said first transfer switch (47) is connected to the positive terminal (25) of the second (14) of said rectifier assemblies (13, 14), the second fixed contact (44) of said first transfer switch is connected both to said first contact (46) of said second switch and to the negative terminal (27) of said first rectifying assembly (13) and said second contact (49) of said second switch (48) is connected both to the positive terminal (29) of said second rectifier assembly (14) and to the negative terminal (28) of the generator circuit output.

Alternator-rectifier electric current generator system comprising

• a multi-phase alternator having a plurality of separate multi-phase windings (11, 12) and a single exciter winding (15), a plurality of multi-phase rectifier assemblies (13, 14) respectively supplied by said multi-phase windings;
• a frequency detector (32) connected to sense the frequency of the output of the alternator;
• and switching means for switching the respective outputs (21, 27 and 25, 29) of said rectifier assemblies (13, 14) selectively into series connection and into parallel connection;
• the frequency detector (32) being connected to and controlling said switching means automatically in response to frequency of the alternator output.

Alternator-rectifier electric current generator system comprising

• a multi-phase alternator having a plurality of separate multi-phase windings (11, 12) and a single exciter winding (15), a plurality of multi-phase rectifier assemblies (13, 14) respectively supplied by said multi-phase windings;
• switching means for switching the respective outputs (21, 27 and 25, 29) of said rectifier assemblies (13, 14) selectively into series connection and into parallel connection;
• and a frequency detector (32);
• wherein said phase windings are star connected and in which supplementary rectifier diodes (35, 36, 37, 38) are connected between the respective star points (41, 42) of the phase windings (11, 12) and respectively the positive (21, 25) and negative (27, 29) terminals of the respective rectifier assemblies (13, 14) connected to the several phase windings (11, 12), whereby a signal at harmonics of the principal output frequency of the alternator output is obtained, the frequency detector (32) being connected to sense the frequency of said harmonic signal.