System and method for limiting input voltage to a power delivery system having regeneration capability

• US 7,902,779 B2
• Filed: 07/03/2008
• Issued: 03/08/2011
• Est. Priority Date: 07/05/2007
• Status: Active Grant

• Current Assignee: Innomotics GmbH
• Original Assignee: Siemens Industry Incorporated (Siemens AG)
• Inventors: Zhang, Xuan, Bousfield, John Channing III, Gaillot, Ronald
• Primary Examiner(s): IP, SHIK LUEN PAUL
• Application Number:
  US12/167,623
• Publication Number:
  US 20090009149A1
• Time in Patent Office: 978 Days
• Field of Search: 318/63, 318/139, 318/375, 318/430, 318/432, 318/459, 318/759, 303/10, 303/113.1, 363/41, 363/65, 363/71
• US Class Current: 318/432
• CPC Class Codes: H02M 5/4585 having a rectifier with controlled elements
• CPC Class Codes: H02M 7/49 Combination of the output voltage waveforms of a plurality of converters
• CPC Class Codes: H02P 3/18 for stopping or slowing an ac motor

Abstract

A system and method for limiting input voltage to a power delivery system having regeneration capability. According to various embodiments, the system includes a regulator having a multiple input variables and at least one output variable; and an accumulator in communication with the regulator wherein the accumulator presets the output of the regulator to facilitate a quick output as well as accumulates error values related to the multiple input variables and facilitates a change by the regulator to the at least one output variable based upon the accumulated values.

Claims

1. A system for limiting input voltage to a power delivery system having regeneration capability, the system comprising:

a regulator having a plurality of input variables and at least one output variable;

an accumulator in communication with the regulator, the accumulator configured to output a preset output variable at the regulator to facilitate a faster output at the regulator at a specific moment in time, wherein the accumulator is further configured to accumulate values related to the plurality of input variables and facilitates a change by the regulator to the at least one output variable based upon the accumulated value; and

a drive controller in communication with the regulator, the drive controller receiving the output variable from the regulator and performing a specific function in response to the output variable.

2. The system of claim 1, wherein said accumulator further accumulates error values associated with the plurality of input variables.

3. The system of claim 2, wherein said error values indicate the current performance of said power delivery system.

4. The system of claim 1, wherein said plurality of input values comprises at least one of an input power reference, a drive input power feedback, and a torque current reference.

5. The system of claim 1, wherein said output value comprises an output torque reference.

6. The system of claim 5, wherein said output torque reference is used to control a motor.

7. The system of claim 1, wherein said accumulator is integral with said regulator.

8. A method for limiting input voltage to a power delivery system having regeneration capability, the method comprising:

determining a drive input power value;

determining an Erms value, wherein the Erms value is based upon an input voltage;

at a regulator, determining a maximum power value based on the Erms value;

outputting a preset drive output torque reference from an accumulator to facilitate an output variable from the regulator at a specific moment in time;

determining an error value based on the maximum power value and the drive input power value at the accumulator and passing the error value to the regulator;

processing the error value at the regulator and limiting the torque reference value based on the error value; and

processing said output torque reference at a drive controller and performing a specific function in response to the output variable.

9. The method of claim 8, wherein further comprising summing said error value at an accumulator over a period of time.

10. The method of claim 9, wherein said limiting the torque reference value is based upon said summed error value.

11. The method of claim 8, further comprising determining a maximum and minimum level for said torque reference value.

12. The method of claim 11, further comprising comparing said error value against a predetermined error value, and limiting the torque reference value based upon a result of the comparison.

13. A system for limiting input voltage to a power delivery system having regeneration capability, the system comprising:

a regulator having a plurality of input variables mid at least one output variable, wherein the regulator determines a maximum power value based on the plurality of input values;

an accumulator in communication with the regulator, the accumulator configured to output a preset output variable at the regulator to facilitate a faster output at the regulator at a specific moment in time, wherein the accumulator is further configured to accumulate values related to the plurality of input variables and facilitates a change by the regulator to the at least one output variable based upon the accumulated value; and

a drive controller in communication with the regulator, the drive controller receiving the output variable from the regulator and performing a specific function in response to the output variable.

14. The system of claim 13, wherein the plurality of input values comprises at least one of an input power reference, a drive input power feedback, and a torque current reference.

15. The system of claim 13, wherein said output value comprises an output torque reference.

16. The system of claim 15, wherein said output torque reference is used to control a motor.

17. The system of claim 13, wherein said accumulator is integral with said regulator.