High frequency bus method

• US 20060131888A1
• Filed: 05/27/2005
• Published: 06/22/2006
• Est. Priority Date: 05/27/2004
• Status: Active Grant

• Current Assignee: Innomotics GmbH
• Original Assignee: Siemens Energy & Automation Incorporated (Siemens AG)
• Inventors: Ahmad, Raed H., Pittius, Ekkehard
• Granted Patent: US 7,227,273 B2
• Time in Patent Office: Days
• US Class Current: 290/40.C
• 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 method comprising a plurality of activities, said activities comprising:

for an off-road traction vehicle;

from an alternator, receiving a first AC signal at an active Insulated Gate Bipolar Transistor rectifier, the active Insulated Gate Bipolar Transistor rectifier electrically coupled to a DC bus; and

via an inverter electrically coupled to the DC bus, providing a second AC signal to a traction motor comprising a double stator winding.

2. The method of claim 1, further comprising:

via the active Insulated Gate Bipolar Transistor rectifier, converting the first AC signal received from the alternator to a DC signal.

3. The method of claim 1, further comprising:

from the active Insulated Gate Bipolar Transistor rectifier, providing a DC signal to the DC bus.

4. The method of claim 1, further comprising:

at an active Insulated Gate Bipolar Transistor DC chopper, receiving an unmodulated DC signal from the DC bus.

5. The method of claim 1, further comprising:

at an active Insulated Gate Bipolar Transistor DC chopper, receiving an unmodulated DC signal from the DC bus; and

via the active Insulated Gate Bipolar Transistor DC chopper, providing a modulated DC signal to a heat sink.

6. The method of claim 1, further comprising:

via an internal combustion engine mechanically coupled to the alternator, transmitting mechanical energy to the alternator.

7. The method of claim 1, further comprising:

varying a voltage on the DC bus responsive to a changed speed of an internal combustion engine mechanically coupled to said alternator.

8. The method of claim 1, further comprising:

varying a voltage on the DC bus is responsive to a changed alternator excitation.

9. The method of claim 1, further comprising:

via the active Insulated Gate Bipolar Transistor rectifier, limiting harmonic current distortion to approximately 5 percent.

10. The method of claim 1, further comprising:

via the active Insulated Gate Bipolar Transistor rectifier, limiting harmonic current distortion to approximately 3 percent.

11. The method of claim 1, further comprising:

via the active Insulated Gate Bipolar Transistor rectifier, limiting harmonic current distortion to approximately 2 percent.

12. The method of claim 1, further comprising:

via the active Insulated Gate Bipolar Transistor rectifier, providing an active input power factor correction to approximately 0.98.

13. The method of claim 1, further comprising:

via the active Insulated Gate Bipolar Transistor rectifier, providing an active input power factor correction to approximately 0.99.

14. The method of claim 1, further comprising:

via the active Insulated Gate Bipolar Transistor rectifier, providing an active input power factor correction to approximately 1.0.

15. The method of claim 1, further comprising:

via the active Insulated Gate Bipolar Transistor inverter generating a space vector modulated AC voltage.

16. The method of claim 1, further comprising:

via the active Insulated Gate Bipolar Transistor inverter, providing a sinusoidal output current with less than approximately 5 percent total harmonic distortion to the traction motor.

17. A method comprising:

an electric drive system for a mining haul truck, comprising;

at an active Insulated Gate Bipolar Transistor inverter, converting a first AC signal received from a traction motor to an unmodulated DC signal, the unmodulated DC signal adapted to be provided to a DC bus, the active Insulated Gate Bipolar Transistor rectifier electrically coupled to the DC bus;

at an active Insulated Gate Bipolar Transistor DC chopper, converting the unmodulated DC signal from the DC bus to a modulated DC signal; and

providing the modulated DC signal to a heat sink.

18. A method comprising:

for an electric drive system for a mining machine, comprising;

at an active Insulated Gate Bipolar Transistor rectifier, converting a first AC signal from an alternator to a DC signal, the active Insulated Gate Bipolar Transistor rectifier electrically coupled to a DC bus; and

via an active Insulated Gate Bipolar Transistor inverter electrically coupled to the DC bus, generating a space vector modulated AC signal.

19. The method of claim 18, further comprising:

at an active Insulated Gate Bipolar Transistor DC chopper, receiving an unmodulated DC signal from the DC bus.

20. The method of claim 18, further comprising:

at an active Insulated Gate Bipolar Transistor DC chopper, converting an unmodulated DC signal received from the DC bus to a modulated DC signal; and

providing the modulated DC signal to a heat sink.