Motor/generator transient response system

• US 7,030,580 B2
• Filed: 12/22/2003
• Issued: 04/18/2006
• Est. Priority Date: 12/22/2003
• Status: Expired due to Fees

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Hoff, Brian D.
• Primary Examiner(s): Martin, David
• Assistant Examiner(s): Hiruy, Elias
• Application Number:
  US10/740,520
• Publication Number:
  US 20050134206A1
• Time in Patent Office: 848 Days
• Field of Search: 318/141, 318/445, 318/18, 290 2- 44, 324/139, 324/177, 324/143, 322/11, 322/17, 322/38, 322/44, 180/65.2, 180/65.3
• US Class Current: 318/141
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• CPC Class Codes: H02P 9/04 Control effected upon non-electric prime mover and dependent upon electric output value of the generator
• CPC Class Codes: H02P 9/102 for limiting effects of transients
• 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 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

A transient response system includes a power source operable to generate a power output and a transmission operatively coupled to the power source. The transient response system also includes a generator operatively coupled to the power source and a controller in communication with the generator and at least one of the power source and the transmission. The controller is operable to receive at least one input having a value indicative of a change in load on the power source and operable to cause the generator to remove power from the power output at a rate corresponding to the value of the at least one input.

Claims

1. A transient response system, comprising:

a power source operable to generate a power output;

a transmission operatively coupled to the power source;

a generator operatively coupled to the power source; and

a controller in communication with the generator and at least one of the power source and the transmission, the controller operable to receive at least one input having a value indicative of a change in load on the power source and operable to cause the generator to remove power from the power output at a rate corresponding to the value of the at least one input and in such a manner to dampen transient power loads applied to the power source by removing less power from the power output in response to an increase in load on the power source;

wherein the at least one input includes a signal corresponding to a fluid pressure of the transmission.

2. A transient response system, comprising:

a power source operable to generate a power output;

a transmission operatively coupled to the power source;

a generator operatively coupled to the power source; and

a controller in communication with the generator and at least one of the power source and the transmission, the controller operable to receive at least one input having a value indicative of a change in load on the power source and operable to cause the generator to remove power from the power output at a rate corresponding to the value of the at least one input and in such a manner to dampen transient power loads applied to the power source by removing less power from the power output in response to an increase in load on the power source;

wherein the at least one input includes a motor command signal of the transmission.

3. A transient response system, comprising:

a power source operable to generate a power output;

a transmission operatively coupled to the power source;

a generator operatively coupled to the power source;

a controller in communication with the generator and at least one of the power source and the transmission, the controller operable to receive at least one input having a value indicative of a change in load on the power source and operable to cause the generator to remove power from the power output at a rate corresponding to the value of the at least one input and in such a manner to dampen transient power loads applied to the power source by removing less power from the power output in response to an increase in load on the power source;

a motor operatively coupled to the power source, wherein the controller is in communication with the motor and operable to cause the motor to add power to the power output at a rate corresponding to the value of the at least one input; and

a second power source configured to power the motor when the motor drives the power source.

4. A method of operating a transient response system comprising:

driving a transmission with a power source, the power source operable to produce a power output;

sensing a load on the power source;

identifying a change in the load on the power source; and

controlling a generator to remove power from the power output at a rate corresponding to a value associated with the change in load on the power source and in such a manner to dampen transient power loads applied to the power source by removing less power from the power output in response to an increase in load on the power source;

wherein the value associated with the change in load on the power source includes a value of a signal corresponding to a fluid pressure of the transmission.

5. A method of operating a transient response system comprising:

driving a transmission with a power source, the power source operable to produce a power output;

sensing a load on the power source;

identifying a change in the load on the power source; and

controlling a generator to remove power from the power output at a rate corresponding to a value associated with the change in load on the power source and in such a manner to dampen transient power loads applied to the power source by removing less power from the power output in response to an increase in load on the power source;

wherein the value associated with the change in load on the power source includes a value of a motor command signal of the transmission.

6. A work machine comprising:

a housing;

a traction device supporting the housing;

a power source operable to generate a power output;

a transmission operatively coupled to the power source;

a generator operatively coupled to the power source;

a controller in communication with the generator and at least one of the power source and the transmission, the controller operable to receive at least one input having a value indicative of a load on the power source and operable to cause the generator to remove power from the power output at a rate corresponding to the value of the at least one input and in such a manner to dampen transient power loads applied to the power source by removing less power from the power output in response to an increase in load on the power source; and

wherein the at least one input includes a signal corresponding to a fluid pressure of the transmission.

7. A work machine comprising:

a housing;

a traction device supporting the housing;

a power source operable to generate a power output;

a transmission operatively coupled to the power source;

a generator operatively coupled to the power source;

a controller in communication with the generator and at least one of the power source and the transmission, the controller operable to receive at least one input having a value indicative of a load on the power source and operable to cause the generator to remove power from the power output at a rate corresponding to the value of the at least one input and in such a manner to dampen transient power loads applied to the power source by removing less power from the power output in response to an increase in load on the power source; and

wherein the at least one input includes a motor command signal of the transmission.