Adaptive connection of resistive elements and temperature-dependent resistive elements

Patent metadata

Field	Value
Publication number	US-11300595-B2
Application number	US-201817259957-A
Country	US
Kind code	B2
Filing date	Nov 7, 2018
Priority date	Nov 7, 2018
Publication date	Apr 12, 2022
Grant date	Apr 12, 2022

Abstract

Apparatus, systems, articles of manufacture, and methods to provide an adaptive connection of a resistive element and a temperature-dependent resistive element are disclosed. An example apparatus includes a temperature-dependent resistive element. The example apparatus further includes a resistive element. The example apparatus further includes a switch coupled to the temperature-dependent resistive element and the resistive element. The example apparatus further includes a current sensor to measure a current through the temperature-dependent resistive element. The example apparatus further includes a processor to control the switch to, based on the measured current, (A) couple the temperature-dependent resistive element in parallel to the resistive element or (B) couple the temperature-dependent resistive element in series with the resistive element.

First claim

What is claimed is:

1. An apparatus to provide an adaptive connection of a resistive element and a temperature-dependent resistive element, the apparatus comprising:
the temperature-dependent resistive element;
the resistive element;
a switch coupled to the temperature-dependent resistive element and the resistive element;
a current sensor to measure a current through the temperature-dependent resistive element; and
a processor, wherein the processor is to:
compare the measured current to a threshold;
control the switch to couple the temperature-dependent resistive element in series with the resistive element responsive to the measured current not exceeding the threshold; and
control the switch to couple the temperature-dependent resistive element in parallel with the resistive element responsive to the measured current exceeding the threshold.

2. The apparatus of claim 1 , wherein the threshold corresponds to a current threshold.

3. The apparatus of claim 1 , wherein the processor is to determine a resistance of the temperature-dependent resistive element based on the measured current.

4. The apparatus of claim 3 , wherein the threshold corresponds to a resistance threshold and the processor is to compare the determined resistance to the resistance threshold.

5. The apparatus of claim 1 , wherein the temperature-dependent resistive element is a halogen lamp element and the resistive element is a resistive heater.

6. A non-transitory computer readable storage medium comprising instructions which, when executed by a processor, cause the processor to:
determine a current through a temperature-dependent resistive element;
compare the determined current to a threshold;
control a switch to couple the temperature-dependent resistive element in series with a resistive element responsive to the determined current not exceeding the threshold; and
control the switch to couple the temperature-dependent resistive element in parallel with the resistive element responsive to the determined current exceeding the threshold.

7. The computer readable storage medium of claim 6 , wherein the instructions cause the processor to determine the threshold corresponds to an amount of current.

8. The computer readable storage medium of claim 6 , wherein the instructions cause the processor to determine a resistance of the temperature-dependent resistive element based on the determined current.

9. The computer readable storage medium of claim 8 , wherein the instructions cause the processor to compare the determined resistance to the threshold, wherein the threshold corresponds to a resistance threshold.

10. The computer readable storage medium of claim 6 , wherein the temperature-dependent resistive element is a halogen lamp and the resistive element is a resistive heater.

11. An apparatus to provide an adaptive connection of a resistive element and a temperature-dependent resistive element, the apparatus comprising:
switch drivers to configure a temperature-dependent resistive element and a resistive element in a series configuration; and
a comparator to determine whether a signal corresponding to a current through the temperature-dependent resistive element exceeds a threshold, wherein the switch drivers are to configure, in response to the signal exceeding the threshold, the temperature-dependent resistive element and the resistive element in a parallel configuration or an independently controllable configuration.

12. The apparatus of claim 11 , wherein the threshold corresponds to a resistance threshold.

13. The apparatus of claim 12 , wherein the signal corresponds to a resistance of the temperature-dependent resistive element, further including a resistance processor to determine the resistance based on the signal.

14. The apparatus of claim 11 , wherein the threshold corresponds to an amount of current.

15. The apparatus of claim 14 , wherein the comparator is to, responsive to the switch drivers configuring the temperature-dependent resistive element and the resistive element in a series configuration, determine whether the signal exceeds the threshold after a preset delay.

16. The apparatus of claim 1 , wherein a resistance of the resistive element is higher than a resistance of the temperature-dependent resistive element while the temperature-dependent resistive element is below a temperature threshold.

17. The apparatus of claim 11 , wherein the threshold corresponds to a voltage ratio threshold.

18. The apparatus of claim 16 , wherein the signal corresponds to a voltage ratio between an amount of voltage measured across the temperature-dependent resistive element and a full line voltage.

Assignees

• Hewlett Packard Development Co

Inventors

• Koehler Duane A
• Yraceburu Robert

Classifications

• G01R19/32 Primary

  Compensating for temperature change · CPC title

• G01R19/16538

  in AC or DC supplies (G01R19/16519 and G01R19/16528 take precedence) · CPC title

• H05B39/02

  Switching on, e.g. with predetermined rate of increase of lighting current · CPC title

• H05B3/008

  for heating of inner spaces · CPC title

• H05B2203/032

  Heaters specially adapted for heating by radiation heating · CPC title