DEVICE FOR GENERATING CONSTANT FREQUENCY AC VOLTAGE AT VARIABLE SPEED OF GENERATOR DRIVE Russian patent published in 2018 - IPC H02P9/00 H02P9/30 H02M1/12 H02M5/453 

FIELD: electricity.

SUBSTANCE: this device contains an electrical machine in generator mode 1 with armature windings 2, 3, configured with the star topology, two three-phase rectifier bridges - primary 4 and secondary 5 with DC outputs 4.1, 4.2 and 5.1, 5.2 respectively, as well as two transfilters 6, 7. Each of the rectifier bridges 4, 5 with their inputs 4.3÷4.5 and 5.3÷5.5, respectively, is connected to one of the armature windings 2, 3. Some of the same polarity outputs 4.1, 5.1 of bridges 4 and 5 are connected to the ends 6.1, 6.2 of the transfilter windings 6, others same polarity outputs 4.2 5.2 of these bridges 4 and 5 are connected to the ends of 7.1, 7.2 of transfilter 7 winding. The middle points 6.3 and 7.3 of the transfilters 6, 7 windings are connected to the ends of the smoothing inductors 8, 9, the other ends are connected to the rationed capacitor 10 armature, connected to power buses for a three-phase voltage inverter 11. Elements 8, 9, 10 form a filter unit for the 12-pulse rectified voltage. The output terminals 11.1, 11.2, 11.3 of the three-phase inverter are connected to the three-phase filter 12. A balanced three-phase load 13 is connected to its outputs 12.1, 12.2, 12.3. One or several single-phase loads 14 are connected through an individual G-shaped LC filter inductor 15 and condenser 16. Two-channel design of the winding 1 armature and rectifier unit using transfilter 6, 7 channels for summing up currents, that improves weight-size parameters of the generator and improves the quality of the rectified voltage due to the double reduction of its pulsation level and double increase of their frequency, and this improves the weight-size parameters of the inductors 8, 9. Transfilters 6, 7 provide independent operation of rectifiers 4, 5 and operate at a triple generator frequency - 3ƒ₁.

EFFECT: expanded functional capacity.

2 cl, 2 dwg