SYSTEM AND METHOD FOR PRODUCTING ANHARMONIC MULTI-PHASE CURRENTS
A system and method for producing anharmonic multi-phase currents wherein the harmonic component of an inverter is filtered and superimposed with a series of control pulses to create a control signal. The control signal is fed back to the inverter, causing the inverter to produce anharmonic multi-phase currents.
1 . A system for producing anharmonic multi-phase currents comprising:
an inverter, the inverter having an input and an output; and,
a function generator, the function generator capable of sampling the inverter output and generating a control signal, the control signal, when applied to the inverter input, causing the inverter to output anharmonic multi-phase currents.
2 . The system of claim 1 , wherein the function generator further comprises a low-pass filter, the low-pass filter producing a filtered signal, the filtered signal comprising the harmonic component of the inverter output, and wherein the control signal comprises the superposition of one or more pulses and the filtered signal.
3 . The system of claim 2 , wherein at least a subset of the pulses are square waves.
4 . The system of claim 2 , wherein at least a subset of the pulses are triangle waves.
5 . The system of claim 2 , wherein the period of the control signal is less than the period of the harmonic component of the inverter output.
6 . The system of claim 2 , wherein the period of the control signal is less than half of the period of the harmonic component of the inverter output.
7 . A system for producing anharmonic multi-phase currents comprising:
an inverter, the inverter having an input and an output; and,
a function generator, the function generator capable of generating a control signal, the control signal comprising one or more pulses, the control signal, when applied to the inverter input, causing the inverter to output anharmonic multi-phase currents.
8 . The system of claim 7 , wherein at least a subset of the pulses are square waves.
9 . The system of claim 7 , wherein at least a subset of the pulses are triangle waves.
10 . The system of claim 7 , wherein the period of the control signal is less than the period of the harmonic component of the inverter output.
11 . The system of claim 7 , wherein the period of the control signal is less than half of the period of the harmonic component of the inverter output.
12 . A method for producing anharmonic multi-phase currents, the method comprising:
filtering an inverter output with a low-pass filter to produce a filtered signal, the filtered signal comprising the harmonic component of the inverter output;
generating a control signal, the control signal comprising the superposition of one or more pulses and the filtered signal, the control signal capable of causing an inverter to output anharmonic multi-phase currents; and,
applying the control signal to an inverter input, thereby causing the inverter to produce anharmonic multi-phase currents.
13 . The method of claim 12 , wherein at least a subset of the pulses are square waves.
14 . The method of claim 12 , wherein at least a subset of the pulses are triangle waves.
15 . The method of claim 12 , wherein the period of the control signal is less than the period of the harmonic component of the inverter output.
16 . The method of claim 12 , wherein the period of the control signal is less than half of the period of the harmonic component of the inverter output.
17 . A method for producing anharmonic multi-phase currents, the method comprising:
generating a control signal, the control signal comprising one or more pulses, the control signal capable of causing an inverter to output anharmonic multi-phase currents; and,
applying the control signal to an inverter input, thereby causing the inverter to produce anharmonic multi-phase currents.
18 . The method of claim 17 , wherein at least a subset of the pulses are square waves.
19 . The method of claim 17 , wherein at least a subset of the pulses are triangle waves.
20 . The method of claim 17 , wherein the period of the control signal is less than the period of the harmonic component of the inverter output.
21 . The method of claim 17 , wherein the period of the control signal is less than half of the period of the harmonic component of the inverter output.