Universal opto-coupled voltage system

• US 10,042,375 B2
• Filed: 09/29/2015
• Issued: 08/07/2018
• Est. Priority Date: 09/30/2014
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Solosky, Rick, Evers, John
• Primary Examiner(s): Leja, Ronald W
• Application Number:
  US14/869,845
• Publication Number:
  US 20160098055A1
• Time in Patent Office: 1,043 Days
• Field of Search: 361 18
• CPC Class Codes: G05F 3/08 wherein the variable is dc
• CPC Class Codes: H02H 3/18 responsive to reversal of direct current
• CPC Class Codes: H02H 9/041 using a short-circuiting device

Abstract

A system for providing one or more voltages at predetermined magnitudes. The system may be supplied with power having a range of voltage magnitudes without affecting the predetermined magnitudes of the one or more voltages provided by the system and without a need to change circuitry of the system. The system may be connected, for example, from 28 VDC to 250 VAC without affecting the predetermined magnitudes of the output voltage or voltages. This system is protected from a mistaken power hook-up thought to be for 28 VDC but actually being connected to 250 VAC, which could be a disaster for a system not having the present circuitry. The system may be used for supplying power for opto-couplers in relay detection and other applications. The system may incorporate lightning and reverse polarity protection, reference and regulated voltages, an output driver, and input isolation circuitry.

Claims

1. A voltage circuit system comprising:

input terminals for connection to a first voltage;

a regulator connected to the input terminals;

an output driver connected to the regulator and for providing a second voltage; and

an isolator connected to the output driver; and

wherein

the isolator comprises an opto-coupler;

the first voltage is of a power source;

the second voltage is a reference voltage; and

the first voltage can have a magnitude between one and twenty times greater than a magnitude of the second voltage without affecting the magnitude of the second voltage, and at least one of a set of contacts of a relay that provides a connection to an opto-coupler circuit that has a magnitude of the first voltage.

2. The system of claim 1, further comprising:

a protection circuit connected between the input terminals and the first voltage; and

wherein the protection circuit guards against harm from lightning and reverse polarity to the regulator, the output driver, and the isolator.

3. The system of claim 2, wherein requirement of the protection circuit is based on determination that a conditioned power source is connected to the input terminals in lieu of the first voltage and prevents effects caused by lightning and reverse polarity to the isolator, output driver, and isolator.

4. The system of claim 1, wherein the first voltage can range from a nominal voltage of about 15 volts RMS to 300 volts RMS, DC or AC.

5. An opto-coupled voltage mechanism comprising:

a protection module;

a reference and regulation module connected to the protection module;

an output driver connected to the reference and regulation module;

an isolation module connected to the output driver;

a reference opto-circuit connected to the output of the output driver for a reference voltage and to an output of the protection module for providing an opto reference sync signal; and

a processor having an input connected to the reference opto-circuit for receiving the opto reference sync signal,

wherein;

the protection module has an input for a system voltage;

the isolation module has an input for an enable signal;

the output driver has an output for providing a reference voltage; and

the system voltage can vary from a first value up to at least an order of magnitude greater than the first value, while the reference voltage remains at a second value.

6. The mechanism of claim 5, wherein the isolation module comprises an opto-coupled circuit having the input for an enable signal and an output to the output driver.

7. The mechanism of claim 6, wherein the system voltage can be between 15 volts RMS to 300 volts RMS, AC or DC.

8. The mechanism of claim 5, further comprising one or more switch detection opto-couplers wherein each switch detection opto-coupler has a first terminal connected to a first contact of a set of contacts, for a switch, having a second contact for connection to the system voltage, and each switch detection opto-coupler has a second terminal connected to the output of the output driver for a reference voltage.

9. The mechanism of claim 8, wherein the one or more switch detection opto-couplers are turned on for a predetermined percentage of the total time of a cycle of power to the mechanism.

10. The mechanism of claim 9, wherein since the one or more switch detection opto-couplers are active for predetermined percentage of time, power dissipation of the mechanism can be decreased by at least 50 percent.

11. A method for adapting a circuit to a supply voltage of various magnitudes, comprising:

generating one or more output voltages having constant levels from various supply line voltage levels;

conveying the one or more output voltages to one or more opto-coupled signal circuits;

turning on the one or more opto-coupled signal circuits when an input measurement is occurring; and

wherein the one or more output voltages bias one or more opto-coupled signal circuits to operate in a correct active range, and limit current to the one or more opto-coupled signal circuits to a magnitude appropriately safe for the one or more opto-coupled signal circuits, and

wherein an input measurement via an opto-coupled signal circuit needs to be active for just a fraction of a contiguous amount of time of a cycle of a supply line voltage available for the input measurement.

12. The method of claim 11, wherein the fraction is equal to or less than fifty percent.

13. The method of claim 12, wherein power dissipation by the one or more opto-coupled signal circuits is decreased up to fifty percent due to turning on the one or more opto-coupled signal circuits when an input measurement is occurring.

14. The method of claim 11, wherein the various supply line voltage levels range from 15 volts to 300 volts RMS, DC or AC.

15. The method of claim 14, wherein each output voltage has a preselected constant magnitude.