Auxiliary power generation in a motor transformer
First Claim
Patent Images
1. A power supply that generates alternating current (AC) and direct current (DC) from a DC voltage source, comprising:
- an inverter that supplies a first phase current and a second phase current to a traction motor; and
a controller that determines a first adjusted phase current based on said first phase current, determines a second adjusted phase current based on said second phase current, calculates an available current based on said first and second adjusted phase currents and generates a voltage control signal based on said available current.
13 Assignments
0 Petitions
Accused Products
Abstract
A power supply generates alternating current and direct current from a constant-voltage source. A multi-phase pulse width modulation voltage source inverter is connected across the source to output multi-phase alternating current. At least one waveform generator is bridged in parallel with the inverter, with each waveform generator outputting zero-sequence waveform current compensated to maintain the multi-phase current within a predetermined tolerance from a desired set point. A rectifier receives the waveform current and generates direct current.
4 Citations
28 Claims
-
1. A power supply that generates alternating current (AC) and direct current (DC) from a DC voltage source, comprising:
-
an inverter that supplies a first phase current and a second phase current to a traction motor; and
a controller that determines a first adjusted phase current based on said first phase current, determines a second adjusted phase current based on said second phase current, calculates an available current based on said first and second adjusted phase currents and generates a voltage control signal based on said available current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method of controlling an alternating current (AC) and direct current (DC) power supply, comprising:
-
determining a first adjusted phase current for a first phase current supplied to a traction motor;
determining a second adjusted phase current for a second phase current supplied to said traction motor;
calculating an available current based on said first and second adjusted phase currents; and
generating a voltage control signal based on said available current. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. A method of regulating an alternating current (AC) and direct current (DC) power supply having a DC source, an inverter and first and second auxiliary transformers, comprising:
-
determining a first adjusted phase current for a first phase current supplied from said inverter to a traction motor;
determining a second adjusted phase current for a second phase current supplied from said inverter to said traction motor;
calculating an available current based on said first and second adjusted phase currents;
generating a voltage control signal based on said available current; and
controlling said inverter based on said voltage control signal to adjust DC voltage outputs of said first and second auxiliary transformers. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
-
Specification