High frequency bus system

• US 7,330,012 B2
• Filed: 05/27/2005
• Issued: 02/12/2008
• Est. Priority Date: 05/27/2004
• Status: Active Grant

• Current Assignee: Innomotics GmbH
• Original Assignee: Siemens AG, Siemens Energy & Automation Incorporated (Siemens AG)
• Inventors: Ahmad, Raed H., Pittius, Ekkehard
• Primary Examiner(s): Donovan; Lincoln
• Assistant Examiner(s): COLON SANTANA, EDUARDO
• Application Number:
  US11/139,754
• Publication Number:
  US 20060001397A1
• Time in Patent Office: 991 Days
• Field of Search: None
• US Class Current: 318/811
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• CPC Class Codes: B60K 2001/003 with means for cooling the electrical propulsion units
• CPC Class Codes: B60K 6/46 Series type
• CPC Class Codes: B60L 1/003 to auxiliary motors, e.g. for pumps, compressors
• CPC Class Codes: B60L 15/007 Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles
• CPC Class Codes: B60L 15/025 using field orientation; Vector control; Direct Torque Control [DTC]
• CPC Class Codes: B60L 2200/26 Rail vehicles
• CPC Class Codes: B60L 2200/40 Working vehicles
• CPC Class Codes: B60L 2210/20 AC to AC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2210/46 with more than three phases
• CPC Class Codes: B60L 2220/58 with more than three phases
• CPC Class Codes: B60L 2270/145 Structure borne vibrations
• CPC Class Codes: B60L 2270/20 Inrush current reduction, i.e. avoiding high currents when connecting the battery
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 50/13 using AC generators and AC motors
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/51 characterised by AC-motors
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections
• CPC Class Codes: H02P 25/22 : Multiple windings; Windings for more than three phases
• CPC Class Codes: H02P 29/40 : Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load
• CPC Class Codes: H02P 5/74 : controlling two or more ac dynamo-electric motors H02P5/46, H02P5/60 take precedence
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 : Electric energy management in electromobility

Abstract

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.

Claims

1. A system comprising:

an electric drive system for an off-road traction vehicle, comprising;

a rectifier that comprises an active Insulated Gate Bipolar Transistor, said rectifier adapted to convert a first AC signal received from an alternator to a first DC signal;

a DC bus adapted to receive the first DC signal, said DC bus adapted to provide electrical energy to at least one auxiliary device via an auxiliary power system inverter that comprises components, each of said components comprising at least one Insulated Gate Bipolar Transistor; and

a traction motor inverter adapted to receive the first DC signal from said rectifier and provide a second AC signal to a traction motor of said off-road traction vehicle, said traction motor comprising a double stator winding, said traction motor inverter adapted to act as a rectifier when said off-road traction vehicle is under retard, when said off-road traction vehicle is under retard, said traction motor inverter adapted to receive a third AC signal from said traction motor and provide a second DC signal to said DC bus wherein said second AC signal is space vector modulated, a space vector modulation sampling interval assigned that is smaller than ⅙

cycle of an intended output fundamental, within each sampling interval vector components considered as a time weight ration.

2. The system of claim 1, wherein said rectifier is adapted to provide the first DC signal to said DC bus.

3. The system of claim 1, further comprising:

a DC chopper that comprises an active Insulated Gate Bipolar Transistor, said DC chopper adapted to receive the first DC signal from said DC bus and provide a third DC signal to a heat sink.

4. The system of claim 1, further comprising:

a heat sink; and

a DC chopper that comprises an active Insulated Gate Bipolar Transistor, said DC chopper adapted to receive the first DC signal from said DC bus and provide a third DC signal to said heat sink.

5. The system of claim 1, further comprising:

an internal combustion engine mechanically coupled to the alternator.

6. The system of claim 1, wherein:

the alternator is adapted to change a voltage of the first DC signal.

7. The system of claim 1, wherein:

the alternator is adapted to change a voltage of the first DC signal by changing excitation to the alternator.

8. The system of claim 1, wherein:

said rectifier is filter-less.

9. The system of claim 1, wherein:

said rectifier is adapted to limit harmonic current distortion to approximately 5 percent.

10. The system of claim 1, wherein:

said rectifier is adapted to limit harmonic current distortion to approximately 3 percent.

11. The system of claim 1, wherein:

said rectifier is adapted to limit harmonic current distortion to approximately 2 percent.

12. The system of claim 1, wherein:

said rectifier is adapted to provide an active input power factor correction to approximately 0.98.

13. The system of claim 1, wherein:

said rectifier is adapted to provide an active input power factor correction to approximately 0.99.

14. The system of claim 1, wherein:

said rectifier is adapted to provide an active input power factor correction to approximately 1.0.

15. The system of claim 1, wherein:

said traction motor inverter provides a sinusoidal output current with less than approximately 5 percent total harmonic distortion to the traction motor.

16. The system of claim 1, wherein:

said system lacks a switched capacitor bank.

17. The system of claim 1, wherein:

said system lacks power factor compensating equipment.

18. The system of claim 1, wherein:

said system comprises a sinusoidal filter adapted to generate a sinusoidal signal at an output of an auxiliary transformer electrically coupled to said rectifier.

19. A system comprising:

an electric drive system for an off-road traction vehicle, comprising;

a rectifier that comprises an active Insulated Gate Bipolar Transistor, said rectifier adapted to convert a first AC signal received from an alternator to a DC signal;

a DC bus adapted to receive the DC signal, said DC bus adapted to provide electrical energy to at least one auxiliary device via an auxiliary power system inverter that comprises Insulated Gate Bipolar Transistor components; and

a traction motor active Insulated Gate Bipolar Transistor inverter adapted to generate a second AC signal that is space vector modulated, a space vector modulation sampling interval assigned that is smaller than ⅙

cycle of an intended output fundamental, within each sampling interval vector components considered as a time weight ration, said traction motor active Insulated Gate Bipolar Transistor inverter adapted to provide said second AC signal to a traction motor of said off-road traction vehicle, said traction motor inverter adapted to act as a rectifier when said off-road traction vehicle is under retard, when said off-road traction vehicle is under retard, said traction motor inverter adapted to receive a third AC signal from said traction motor and provide a second DC signal to said DC bus.

20. A system comprising:

an electric drive system for an off-road traction vehicle, comprising;

a DC bus adapted to receive a DC signal, said DC bus adapted to provide electrical energy to at least one auxiliary device via an auxiliary power system inverter that comprises Insulated Gate Bipolar Transistor components; and

a traction motor active Insulated Gate Bipolar Transistor inverter adapted to generate a AC signal that is space vector modulated, a space vector modulation sampling interval assigned that is smaller than ⅙

cycle of an intended output fundamental, within each sampling interval vector components considered as a time weight ration, switches of said traction motor active Insulated Gate Bipolar Transistor inverter operated to apply each of two active vectors for a specific fraction of said space vector modulation sampling interval, said traction motor active Insulated Gate Bipolar Transistor inverter adapted to provide said AC signal to a traction motor of said off-road traction vehicle.