초록 ▼

To supply intermittently required high-power loads, such as heater applications in an automotive vehicle, a dual armature winding three-phase alternator has a first or main winding connected to a first or main rectifier bank to supply power to vehicular loads, for example at 12 V nominal level; an a

To supply intermittently required high-power loads, such as heater applications in an automotive vehicle, a dual armature winding three-phase alternator has a first or main winding connected to a first or main rectifier bank to supply power to vehicular loads, for example at 12 V nominal level; an auxiliary winding is connected to a rectifier which can be switched to operate as a half-wave rectifier, in parallel with the main winding and main rectifier to supply the ordinary loads when high-power loads are not connected; or to be switched in a full-wave bridge rectifier configuration to provide additional power at elevated voltage, added to the voltage of the rectifier receiving current from the main windings, for example providing 16ㆍ√3=28 V added to the nominal supply voltage of 12 V=40 V voltage to the heater load.

대표청구항 ▼

In a self-contained electrical network having an a-c generator (10) having two groups of armature windings (1－U, V, W; 4－U′, V′, W′); two groups of rectifiers (5, 6; 11), one each being connected to a respective armature winding group to provide respective d-c outputs, a method of supplying electric

In a self-contained electrical network having an a-c generator (10) having two groups of armature windings (1－U, V, W; 4－U′, V′, W′); two groups of rectifiers (5, 6; 11), one each being connected to a respective armature winding group to provide respective d-c outputs, a method of supplying electrical energy at multiple voltage levels in multiple power ranges comprising, in accordance with the invention, the steps of selectively connecting the d-c outputs of the rectifier groups in series; supplying a first load (Q) from a first group of rectifiers (5, 6) associated with a first group of armature windings (1) at a voltage level which is determined by the rectified voltages from the windings (1) associated with said first rectifier group; supplying a second load (R) from the series connected first and second rectifier groups (5, 6; 11) and hence at a voltage level which is the sum of the rectified voltages from said first and second groups of windings (1, 4); and, upon disconnection of the second load (R), connecting said second rectifier group (11) in parallel with said first rectifier group (5, 6) to supply the first load (Q) with power derived from both said windings (1, 4) and from both said rectifier groups.