Auxiliary bus system
View Patent ↗Certain exemplary embodiments can comprise a system comprising an electric drive system for a machine. The system can comprise a rectifier adapted to convert AC power from an alternator to DC power. The system can comprise an inverter adapted to receive DC power from the rectifier and provide power to a traction motor and/or auxiliary devices. Certain exemplary embodiments can comprise a system and method for dissipating excess energy from a machine.
1. A system comprising:
an auxiliary power system adapted for an off-road traction vehicle, comprising:
an active rectifier comprising an Insulated Gate Bipolar Transistor, said active rectifier a self-commutated infeed/regenerative feedback unit, said active rectifier adapted to receive a first AC signal from an alternator and provide a first DC signal to a DC bus; and
an active Insulated Gate Bipolar Transistor inverter adapted to receive the first DC signal from the DC bus and provide a second AC signal to an auxiliary device;
wherein the second AC signal is a space vector modulated AC signal, said space vector modulated AC signal based upon a sampling interval that is smaller than approximately one sixth of a cycle of a target output fundamental, Insulated Gate Bipolar Transistors of said active Insulated Gate Bipolar Transistor inverter adapted to be switched via an application of each of two active vectors for a predetermined sub-interval of said sampling interval.
2. The system of claim 1 , further comprising:
an active Insulated Gate Bipolar Transistor DC chopper adapted to receive the first DC signal from a second active Insulated Gate Bipolar Transistor inverter coupled to a traction motor, said active Insulated Gate Bipolar Transistor DC chopper adapted to provide a second DC signal to a heat sink.
3. The system of claim 1 , wherein:
said active rectifier provides a voltage of approximately 1800 volts to the DC bus.
4. The system of claim 1 , further comprising:
an internal combustion engine mechanically coupled to the alternator.
5. The system of claim 1 , further comprising:
a transformer electrically coupled to said active Insulated Bipolar Transistor inverter.
6. The system of claim 1 , further comprising:
a sinusoidal filter electrically coupled to said active Insulated Bipolar Transistor inverter.
7. The system of claim 1 , wherein:
said active rectifier is filter-less and adapted to limit harmonic current distortion to approximately 5%.
8. The system of claim 1 , wherein:
said active rectifier is filter-less and adapted to limit harmonic current distortion to approximately 3%.
9. The system of claim 1 , wherein:
said active rectifier is filter-less and adapted to limit harmonic current distortion to approximately 2%.
10. The system of claim 1 , wherein:
said active rectifier provides an active input power factor correction to approximately 0.98.
11. The system of claim 1 , wherein:
said active provides an active input power factor correction to approximately 0.99.
12. The system of claim 1 , wherein:
said active rectifier provides an active input power factor correction to approximately 1.0.
13. The system of claim 1 , wherein the second AC signal is a sine wave Pulse Wave Modulated DC voltage.
14. The system of claim 1 , wherein the second AC signal is a sine wave output current with less than approximately 5% total harmonic distortion to the auxiliary device.
15. The system of claim 1 , wherein the second AC signal has a frequency of approximately 60 Hz.
16. The system of claim 1 , wherein the second AC signal has a frequency of approximately 90 Hz.
17. The system of claim 1 , wherein the second AC signal has a frequency of approximately 120 Hz.
18. The system of claim 1 , wherein:
said active rectifier lacks a filter.
19. The system of claim 1 , wherein:
said system lacks a switched capacitor bank.
20. The system of claim 1 , wherein:
said system lacks power factor compensating equipment.
21. The system of claim 1 , wherein:
said system lacks a harmonic filter.
22. A system comprising:
an auxiliary power system adapted for a mining haul truck, comprising:
an active rectifier comprising an Insulated Gate Bipolar Transistor, said active rectifier a self-commutated infeed/regenerative feedback unit, said rectifier adapted to receive a first AC signal from an alternator and provide a first DC signal to a DC bus; and
an active Insulated Gate Bipolar Transistor inverter adapted to receive the first DC signal from the DC bus and provide a second AC signal to an auxiliary device;
wherein the second AC signal is a space vector modulated AC signal, said space vector modulated AC signal based upon a sampling interval that is smaller than approximately one sixth of a cycle of a target output fundamental, Insulated Gate Bipolar Transistors of said active Insulated Gate Bipolar Transistor inverter adapted to be switched via an application of each of two active vectors for a predetermined sub-interval of said sampling interval.
23. A system comprising:
an auxiliary power system adapted for an off-road traction vehicle, comprising:
an active Insulated Gate Bipolar Transistor inverter adapted to receive a first DC signal from a DC bus and provide an AC signal to an auxiliary device; and
an active Insulated Gate Bipolar Transistor DC chopper adapted to receive the first DC signal from the DC bus, said active Insulated Gate Bipolar Transistor DC chopper adapted to provide a second modulated DC signal to a heat sink;
wherein the AC signal is a space vector modulated AC signal, said space vector modulated AC signal based upon a sampling interval that is smaller than approximately one sixth of a cycle of a target output fundamental, Insulated Gate Bipolar Transistors of said active Insulated Gate Bipolar Transistor inverter adapted to be switched via an application of each of two active vectors for a predetermined sub-interval of said sampling interval.
24. A system comprising:
an auxiliary power system adapted for a vehicle, comprising:
an active Insulated Gate Bipolar Transistor inverter adapted to receive a first DC signal from a DC bus and provide an AC signal to an auxiliary device, the AC signal a space vector modulated signal, the space vector modulated signal having a vector scale in a space vector domain that is three fourths of a modulating depth for each phase voltage; and
an active Insulated Gate Bipolar Transistor DC chopper adapted to receive the first DC signal from the DC bus, said active Insulated Gate Bipolar Transistor DC chopper adapted to provide a second modulated DC signal to a heat sink.