GB2536213A - Low power gas shut-off valve solenoid electronic driver circuit for horse box, caravan, camper van, leisure vehicle and leisure boat applications - Google Patents
Low power gas shut-off valve solenoid electronic driver circuit for horse box, caravan, camper van, leisure vehicle and leisure boat applications Download PDFInfo
- Publication number
- GB2536213A GB2536213A GB1503703.9A GB201503703A GB2536213A GB 2536213 A GB2536213 A GB 2536213A GB 201503703 A GB201503703 A GB 201503703A GB 2536213 A GB2536213 A GB 2536213A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas shut
- valve solenoid
- leisure
- solenoid
- driver circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
- H01F7/1805—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
Abstract
An electronic switch circuit with a gas shut-off valve solenoid for use in a leisure vehicle such as a caravan, campervan or horse box. The solenoid needs an initial period of high voltage to activate, and then voltage is reduced. This reduces the electrical power needed to maintain the solenoid in the shut-off state. The circuit may also include a DC-DC converter and MOSFET transistors or power switch integrated circuits, where the transistors or power switches minimise power loss and voltage drop.
Description
Low Power Gas Shut-Off valve Solenoid electronic driver circuit for Horse box, caravan, Camper van, leisure vehicle and leisure boat applications.
Background
This invention relates to an electronic circuit that reduces the electrical power necessary to operate a Gas Shut-Off valve solenoid.
Camper Vans, Caravans, Horse boxes, and leisure boats are now using built in Gas tanks for supplying Gas heaters, Gas Fridges, Gas Cookers and external Gas BBQ's. The Gas Tank is required to have a Gas shut-off valve fitted on its output pipe for safety reasons. When a solenoid operated Gas shut-off valve is used for this purpose electrical power must be supplied to the solenoid, whenever a gas supply is required. If not being charged the internal battery or leisure battery power source gets discharged by the Gas shut-off valve solenoid drawing a significant amount of electrical power, if used for long periods.
Statement of Invention
To reduce the electrical power required to keep the Gas shut-off Valve solenoid operating, this invention proposes using an electronic switch circuit to reduce the voltage being applied to the solenoid coil after an initial switch on period, at the full battery supply voltage.
Advantages By reducing the Gas shut-off valve solenoid supply voltage less current and electrical is required to keep the solenoid energised. A typical 80% plus reduction of solenoid power consumption is achieved by the present invention. When the Gas Shut-Off Valve solenoid is battery powered this increases battery life, and helps reduce the requirement for often inconvenient battery or leisure battery recharging.
Preferably the above reduced Gas shut-off valve solenoid supply voltage is derived from an efficient switch mode DC to DC converter power supply circuit.
Preferably the above electronic switch circuit is implemented using Metal-Oxide-Semiconductor Field-Effect (MOSFET) transistors or Power Switch Integrated circuits to minimise supply voltage drop and power losses.
Introduction to Drawings
An example of the invention will now be described by referring to the accompanying schematic diagram drawings: Figure 1 Shows the conventional way of powering a Gas Shut-Off valve solenoid in a typical mobile leisure application.
Figure 2 Shows how a reduced Gas Shut-Off Valve Solenoid supply voltage can be derived according to the invention.
Figure 3 Shows the electronic Switch Circuit for powering the Gas Shut-Off Valve solenoid can be derived according to the invention.
Detailed Description
Page 1 Figure 2 of the drawings shows how the Gas Shut-Off valve solenoid reduced supply voltage rail labled '+3V6' can be derived. The 12 volt Leisure battery is connected via a 2 Amp fuse to J1. The battery supply rails are named '+12V IN' and 'GND'. A switch mode Direct Current (DC) to DC Converter is used to produce the supply rail labled '+3V6'. This supply rail has a nominal DC voltage of 3.6 volts. In this circuit the Switch Mode DC to DC Converter circuit has a working input voltage of 10.5 volts DC to 36 volts DC. The output voltage specification is a regulated 3.6 Volts DC, with a maximum load output of half an Amp. The manufactures suggested circuit for the Texas Instruments LM43600 Integrated Circuit (IC) was used to implement the DC to DC converter design for the parameters specified. Capacitors C2, C3, C4 and C5 provide power supply rail smoothing and decoupling.
Page 2 Figure 3 of the drawings shows the remainder of the electronic circuit. Two Input or Output (I0) signal lines connected via J3 are used to turn the Gas Shut-Off Valve Solenoid ON and Off. At power up the Gas Shut-OFF Valve solenoid will be Off. The signal line labelled 'UP IO l' is pulled low via Rl. The signal Line labelled 'UP Hi 2' is pulled high via R2. To turn the Gas Shut-Off valve solenoid ON the signal line labelled 'UP l' is switched high (2.4 volts to 3.6 volts DC). This makes U1 to switch the '+12V IN' battery voltage onto U1 pin 3. The Gas Shut-Off Valve now turns ON, as it now has the 12 volt Battery voltage connected to its solenoid terminals. The Page 2 Figure 3 components T2, U2, R4 and R5 are connected as an Ideal Diode, and because of this the Ti Drain pin (D) is being safely held low by R3. Because we have used the full 12 volt battery voltage to turn on the Gas Shut-Off Valve Solenoid it is able to operate at its Maximum Working Gas Pressure. After an intimal switch ON period, 3 seconds in this example the Gas Shut-Off Valve Solenoid can be switched to its low power mode. This is done by setting the Page 2 Figure 3 signal line labelled 'UP IO 2' low (0.6 volts DC or less). T1 is now turned on and the '+3V6' supply rail is connected the Drain pin of T2. Next the Page 2 Figure 3 signal Line labelled 'UP IO l' is set Low (0.6 volts DC or less). Ul is now turned Off. The Gas Shut-Off Valve remains ON because both T1 and T2 are enabled and the '+3V6' supply rail is connected across the Gas Shut-Off Valve Solenoid. This is greater than the connected Multi Valve Gas Shut-Off Valve solenoid holding voltage, so the Gas shut Off-Valve stays ON. The current drain from the 12 volt battery by this circuit has now dropped from a nominal 0.98 Amps to a nominal 0.12 Amps. To turn off the Gas Shut-Off Valve Page 2 Figure 3 signal Line labelled 'UP IO 2' is set high (3 volts to 3.6 volts DC). This turns off T1 and no power is being supplied to the Gas Shut-Off Valve Solenoid so it turns Off. Page 2 Figure 3, Component Dl helps to protect T2 and Ul from any Solenoid coil reverse voltage transients.
Claims (3)
- Claims 1. Low Power Gas Shut-Off Valve Solenoid electronic driver circuit comprising: an electronic switch circuit to select a reduced Gas Shut-Off Valve solenoid supply voltage and reduced power consumption after an initial switch on period at the nominal solenoid working voltage.
- 2. The Low Power Gas Shut-Off Valve Solenoid electronic driver circuit of claim 1 further comprising of a switch mode Direct Current (DC) to DC converter to produce the reduced Gas Shut-Off valve solenoid supply voltage.
- 3. The Low Power Gas Shut-Off Valve Solenoid electronic driver circuit of claim 1 further comprising of a selectable dual supply voltage electronic switch circuit using Metal-OxideSemiconductor Field-Effect (MOSFET) transistors or Power Switch Integrated circuits to minimise supply voltage drop and power losses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1503703.9A GB2536213A (en) | 2015-03-05 | 2015-03-05 | Low power gas shut-off valve solenoid electronic driver circuit for horse box, caravan, camper van, leisure vehicle and leisure boat applications |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1503703.9A GB2536213A (en) | 2015-03-05 | 2015-03-05 | Low power gas shut-off valve solenoid electronic driver circuit for horse box, caravan, camper van, leisure vehicle and leisure boat applications |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201503703D0 GB201503703D0 (en) | 2015-04-22 |
| GB2536213A true GB2536213A (en) | 2016-09-14 |
Family
ID=52998404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1503703.9A Withdrawn GB2536213A (en) | 2015-03-05 | 2015-03-05 | Low power gas shut-off valve solenoid electronic driver circuit for horse box, caravan, camper van, leisure vehicle and leisure boat applications |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2536213A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1594227A2 (en) * | 2004-05-04 | 2005-11-09 | Millipore Corporation | Low power solenoid driver circuit |
| CN203099031U (en) * | 2012-11-21 | 2013-07-31 | 浙江汉特姆阀门有限公司 | Low-running current normally-closed gas safety solenoid valve electric control gear |
-
2015
- 2015-03-05 GB GB1503703.9A patent/GB2536213A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1594227A2 (en) * | 2004-05-04 | 2005-11-09 | Millipore Corporation | Low power solenoid driver circuit |
| CN203099031U (en) * | 2012-11-21 | 2013-07-31 | 浙江汉特姆阀门有限公司 | Low-running current normally-closed gas safety solenoid valve electric control gear |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201503703D0 (en) | 2015-04-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |