System and method for inductance compensation in a welding-type system
Systems and methods for inductance compensation in a welding-type system include a reel configured to wind a welding-type cable to reduce a first portion of the welding-type cable extending from the reel, and to unwind to increase the first portion of the welding-type cable extending from the reel, wherein a second portion of the welding-type cable is at least partially wound around the reel when stored. A controller determines a first length of the first portion of the welding-type cable, calculates a first inductance of the first portion of welding-type cable extending from the reel based on the first length, determines a second length of the second portion of the welding-type cable, calculates a second inductance of the second portion of welding-type cable wound around the reel based on the second length, and calculates a cable inductance of the welding-type cable based on the first inductance and the second inductance.
1. A welding-type power supply comprising:
a welding-type cable;
a reel configured to wind the welding-type cable to reduce a first portion of the welding-type cable extending from the reel, and to unwind to increase the first portion of the welding-type cable extending from the reel, wherein a second portion of the welding-type cable is at least partially wound around the reel when stored, wherein the welding-type cable includes either (1) a power-return work cable or (2) at least one power conductor configured to deliver power to a welding-type tool; and
a controller configured to:
determine a first length of the first portion of the welding-type cable;
calculate a first inductance of the first portion of the welding-type cable extending from the reel based on the first length;
determine a second length of the second portion of the welding-type cable;
calculate a second inductance of the second portion of the welding-type cable wound around the reel based on the second length; and
calculate a cable inductance of the welding-type cable based on the first inductance and the second inductance.
2. The welding-type power supply as defined in claim 1 , wherein the controller is further configured to:
access a memory device that includes a plurality of values that associates a length of a cable wound around a reel with corresponding inductance values; and
determine the second inductance by looking up the determined second length of the second portion of the welding-type cable in the memory device.
3. The welding-type power supply of claim 1 , wherein the controller is further configured to control a welding parameter of the welding-type power supply based on the calculated cable inductance of the welding-type cable.
4. The welding-type power supply of claim 1 , further comprising a sensor to measure the first length of the first portion of the welding-type cable extending from the reel.
5. The welding-type power supply of claim 4 , wherein the controller is further configured to calculate the second length of the second portion of the welding-type cable wound around the reel based on the first length of the first portion of the welding-type cable extending from the reel and a total length of the welding-type cable.
6. The welding-type power supply as defined in claim 4 , wherein the sensor is one of a digital or an analog rotary encoder configured to count a number of revolutions of the reel during winding and unwinding of the welding-type cable.
7. The welding-type power supply as defined in claim 4 , wherein the sensor is a mechanical length measuring meter configured to measure the first length of the first portion of the welding-type cable during winding and unwinding of the welding-type cable.
8. The welding-type power supply as defined in claim 1 , wherein the controller is further configured to:
access a memory device that includes a plurality of values that associates inductance with corresponding welding parameters or welding system parameters; and
determine a welding parameter or welding system parameter by looking up the calculated cable inductance in the memory device.
9. The welding-type power supply as defined in claim 8 , wherein the controller is further configured to:
identify a value of the determined welding parameter or welding system parameter based on the calculated cable inductance;
compare the identified value to a desired value of the welding parameter or welding system parameter; and
adjust a value of the welding parameter or welding system parameter based on the comparison.
10. The welding-type power supply as defined in claim 9 , wherein the welding parameter is one of a voltage or a current.
11. A welding-type power supply comprising:
a welding-type cable;
a reel configured to manage the welding-type cable having a known fixed length such that a first portion of the welding-type cable is extended from the reel and a second portion of the welding-type cable is at least partially wound around the reel,
wherein the reel is configured to wind the welding-type cable to reduce the first portion and to unwind to increase the first portion of the welding-type cable extending from the reel, and
wherein the welding-type cable comprises a power-return work cable;
a sensor configured to measure a first length of the first portion of the welding-type cable; and
a controller operably coupled to the sensor configured to:
determine the first length;
determine a first inductance of the first portion of the welding-type cable extending from the reel based on the first length;
determine a second length of the second portion of the welding-type cable based on the known fixed length and the first length;
determine a second inductance of the second portion of the welding-type cable wound around the reel based on the second length; and
calculate a cable inductance of the welding-type cable based on the first inductance and the second inductance.
12. The welding-type power supply of claim 11 , wherein the sensor is an optical sensor configured to read one or more markings positioned on an exterior surface of the welding-type cable.
13. The welding-type power supply of claim 11 , wherein the sensor is a rotary encoder configured to count a number of revolutions of the reel during winding and unwinding of the welding-type cable relative to the reel.
14. The welding-type power supply of claim 11 , wherein the controller is further configured to:
access a memory device that includes a plurality of values that associates a length of the second portion wound around a reel with corresponding inductance values; and
determine the second inductance by looking up the determined second length of the second portion of the welding-type cable in the memory device.
15. The welding-type power supply of claim 11 , wherein the controller is further configured to control a welding parameter of the welding-type power supply based on the calculated cable inductance of the welding-type cable.
16. The welding-type power supply of claim 15 , wherein the welding parameter is one of a voltage or a current.
17. The welding-type power supply of claim 11 , wherein the controller is further configured to access a memory device that includes the known fixed length.
18. A welding-type power supply comprising:
a welding-type cable;
a reel configured to manage the welding-type cable having a known fixed length such that a first portion of the welding-type cable is extended from the reel and a second portion of the welding-type cable is at least partially wound around the reel,
wherein the reel is configured to wind the welding-type cable to reduce the first portion and to unwind to increase the first portion of the welding-type cable extending from the reel, and
wherein the welding-type cable comprises at least one power conductor configured to deliver power to a welding-type tool;
a sensor configured to measure a first length of the first portion of the welding-type cable; and
a controller operably coupled to the sensor configured to:
determine the first length;
determine a first inductance of the first portion of the welding-type cable extending from the reel based on the first length;
determine a second length of the second portion of the welding-type cable based on the known fixed length and the first length;
determine a second inductance of the second portion of the welding-type cable wound around the reel based on the second length; and
calculate a cable inductance of the welding-type cable based on the first inductance and the second inductance.
19. The welding-type power supply of claim 18 , wherein the controller is further configured to:
access a memory device that includes a plurality of values that associates a length of the second portion wound around a reel with corresponding inductance values; and
determine the second inductance by looking up the determined second length of the second portion of the welding-type cable in the memory device.
20. The welding-type power supply of claim 19 , wherein the controller is further configured to control a welding parameter of the welding-type power supply based on the calculated cable inductance of the welding-type cable.