Is there a device that I can connect to my inverter to keep it from shutting down due to voltage spikes from the vehicle?
The vehicle is a 2006 Chevy Colbalt and when the vehicle is started, the volts spike to 14.8 after about a minute. The inverter works fine when the vehicle is not running. It is connected properly. Is there some kind of protection device that can be connected between the vehicle's battery and the inverter that would limit the high voltage to the inverter? The vehicle's charging system is working properly
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Re: Is there a device that I can connect to my inverter...
Short of shutting the inverter off momentarily, there is not a simple answer. because you could slightly modify the inverter's over voltage reference IC, but that requires knowledge of the inverter that the manufacturer does not want you to know normally.
if you are running the inverter off a second battery, you
could isolate that second battery from the system through any number of
time delay relays, time delay circuits comparable to intermittent wiper
However, if you are capable with a soldering iron, MOSFETs can be utilized as a voltage variable resistor. They can be in a parallel array to increase current. You need to know what current draw is by the inverter with the normal load.
Once you know that current, you can select a MOSFET of sufficient "Constant Current" or pair of them and wire them as "Voltage variable resistor."
The circuit actually does work, the resistor is adjusted until you aproach the "pinch off zone" and tweak it to the point you want to operate with. The MOSFETs will need to be on a heat sink, any you can even wire a switch across them to short across them to remove them from the circuit. The image only shows one MOSFET, but they can be operated in parallel for more current capactiy. Which why the constant current rating of the MOSFET needs to be known. The type of MOSFET is not critical, it can be a trench fet, hexfet, etc. You should plan for double the current draw in your MOSFET selection for purposes of a design centered value. You can use up to about 5 MOSFETs from that one pot. For extra margin in the design you could add 0.1 ohm (2 Watt) resistor in series with each MOSFET to balance current through the MOSFETS, although MOSFETS will self equalize to a point. When they heat up their internal resistance goes up so thermal runaway is not normally an issue.
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You said "ECU being funny if you connect any power source to any outlet"
You aren't connecting a power "Source" to the vehicle unless the unit has internal batteries.
The ECU is far more sensitive to someone connecting another lead acid battery to the system, as in Jump Starting the Car.
A spike or trancient voltage can damage the vehicles main control cpu or ECU but highly unlikely from a dvd player or mobile phone etc.
I wouldn't be overly concerned....
If the device you attaching draws only 1-2 amps then pinching a bit of power from the reversing light is the way we all do it.
But... you can insert a device like this in between to protect your DVD Screen from transients.
We all use many devices and equipments that run on electricity. For all these to function properly they need uniform power supply (constant flow of electricity). As the electric supply in many countries is not uniform there is a need for a device to correct it. There are many such devices available in the market today. For example UPS (Uninterrupted power supply), Voltage Stabilizer, Constant Voltage Transformer are such devices available today.<br />
<b><u>Why buy a UPS?</u></b><br />We can never guarantee that we will get constant power. The power supply always has fluctuations. Surges, Spikes, Brownouts, Blackouts and Noise can damage your electrical appliances especially your computer. To prevent this from happening you need a device that does power conditioning. Electricity has to be uninterrupted. If the voltage is higher than the specified level then it is 'Over Voltage'. If the voltage is lower than the specified level then it is 'Under Voltage'. Both Spike and Surge come under 'Over Voltage' category. But there is a small difference between spike and surge. If there is very high voltage for an instant but comes back to normal immediately then it is called 'Spike'. If there is very high voltage for a slightly longer period then it is called 'Surge'. If the voltage is dangerously reduced to very low within a short period of time then it is called 'Brownout'. When this happens, the computer can be seriously damaged. If the power supply is totally cut then it is called 'Blackout'. Noise can mix with electromagnetic or radio waves or any signals. This is called 'Line Noise'. This may also reduce the voltage level to very low within a short period of time.<br />
<b><u>How can the UPS provide power when the main electrical supply is cut?<br /></u></b>A UPS has an internal battery. With this battery charger, an Inverter is also present. The inverter converts the 'Direct current' supplied by the battery to 'Alternatinc current' as required by the computer. When there is electrical supply the charger in the UPS charges the internal battery. When there is a power cut, the battery kicks in to supply the DC which is converted to AC by the inverter and power is supplied to computer.<br />
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<b><u>What if the battery loses its power?</u></b><br />When there is power cut, the required power is taken from the battery. Therefore the battery keeps losing its capacity. If the power supply comes back before the battery is depleted then the battery charger will start recharging, but if the power supply doesn't come back then the battery keeps supplying until it totally drains out. When the battery drains below a certain level the UPS sounds an alarm for your to shut down your computer and turn off the UPS. Some UPS' even have a built in system that shuts your computer down for you after a certain amount of UPS uptime.<br />
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<b><u>How long can the UPS provide power when there is a blackout?</u></b><br />This all depends on the specifications of the UPS and the requirement of the computer. A 600vA UPS for example can supply power to a computer with a 550W power supply for about 10 minutes or more.<br />
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<b><u>Tips for buying an UPS</u></b><br />The backup time of your UPS is the most important you need to consider. Other than that, you should know how many KVA (Kilo Volt Ampere) your UPS has. A computer needs atleast 0.5 KVA (500VA) to function. If you are planning to connect more than one computer to a single UPS then you need to get one with a higher KVA.<br />
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<b><u>What type of battery does a UPS use?</u></b><br />UPS uses <b>SMF</b> batteries (Sealed Maintenance Free). These type of batteries can be used for 5 to 7 years continuously.
First if you can, try the monitor with other PC first to make sure it is not the PC problem.
If it behaves in the same fashion, then most probably has dying power supply due to bad DC filter caps, just see the top side of the caps to ensure it has not bulged up distorted.See the images bellow OR
Then there is the logic board. Plug the monitor in but do not activate the power switch so the backlight
inverter circuits will be off. Check the 5vdc and the 12~24vdc to make sure they
are OK. They should be tested with the load, you can use 6V 1A (6watts) lamp for
the 5vdc, and car lamps such as 1157 (12v 8watts lo/26watts high) turn
signal brake lamp using high filament connection for testing the 12~18vdc (or
use two 1157 in series for 19~24vdc) for the backlight inverter circuits.
If the power supplies are working, the output voltages should
be steady at the rated voltages. The power supply will go into shut down if it
detects too much current draw due to false in the power supply or short circuits
in the backlight inverter or in the logic board.
The backlight inverter circuits: It takes the 12~24vdc
and converts it to high frequency AC to drive the inverter transformers CCFL
(Cold Cathode Fluorescent Lamp) assemblies. The transformers will drive the CCFL
by applying the start up voltage (around 1500~2000v), when the CCFL start
conducting, the voltage will drop down to about 500~800v. The
inverter has detection circuits to detect open circuit if the lamp is not
attached or does not fire up after the start up voltage is applied, it will go
into shut down. It will also shut down if the lamps draw too much current due to
ages (when lamp gets old it will draw more current). The
inverter gets two signals from the logic board, one is the backlight
ON/OFF signal, the other one is the Dimming signal for the
lamps. Common problems: Bad filter caps,
resonant caps (in the inverter output circuits), blown transistors/IC, shorted
or open transformer winding.
If you are confident with your skill then go ahead else go to an authorized outlet for repairing Do write back if you face any difficulty while working on the monitor
I can only give some general thoughts on this, I have patched up a few inverters.
Their core parts rely on a component called capacitors these over time degrade with heat which reduces their manufactured value this will mean they fail to fully do their job. The usual result is not providing a smooth supply rail allowing voltage spikes which trip over and under voltage sensing firing off the alarm, more so when not loaded with appliances as spikes can become large.
Your appliances would be snubbing out these through their loading but this can be trouble because they are absorbing this extra energy which may damage them eventually.
This situation will possibly get worse with the inverter failing, it will need a service engineer to work on it or to purchase a new one if there is no local regional repair place.
Look up faulty capacitors in power supplies on the web for an insight.
boost the vehicle .carefull that the other vehicle is off when boosting.this to protect both vehicles from voltage spikes.if you have a boost pack to keep the engine running.thats the best.way to boost the car.question.is the battery over 5yrs old if so replace it first.
If your not getting enough voltage to the inverter it will beep to let you know you don't have enough power. Most common cause is a lose connection thru your cigarette lighter. Also if you turn your key off it might be shutting down power to your plug. Make sure you have a good connection with your battery or plug adapter. You also need a good battery so you don't go into a low voltage condition which will make your inverter beep.
Is that all the load on the generator? If so, it's probably just not regulating. Try loading it up with about 250W worth of lightbulbs (like one of those construction floodlights), it'll probably settle right down. The inverter charger is doing you a favor and protecting itself.
Restating the question - 400 watt inverter is turned on and running with the vehicle turned off.
After starting vehicle the red light of the inverter is on with no power output from the inverter.
If you turn the inverter off then on inverter operates normally.
Solution - this is normal operation - my inverter does the same thing. When you start the vehicle
it draws a lot of current from the vehicle battery which causes a drop in battery voltage. Most inverters have a low voltage input safety and will fault the device.'
If the problem is turn on inverter then the red light starts flashing... I am thinking you
have the same problem as the one I replaced - it broke... I am sure some capicator
or other component in the circuit failed... My solution was to purchase a new one...
Brown-out .... What is it?Brown-out is a condition of lower than normal power line voltage being supplied by your local utility or generating equipment. This condition may be short term (minutes to hours) or long term (1/2 day or more). A power line voltage reduction of 8 - 12% is usually considered a Brown-out. What causes Brown-outs?Electric utilities (your local, lovable Power Company) may occassionally reduce line voltage to Brown-out levels in an effort to adequately manage power generation and distribution during periods of heavy usage. Very hot days, when most air conditioning and refrigeration equipment would be operating almost continuously, is an example of such a situation. Even without utility intervention, extreme overloads caused by most air conditioning and refrigeration equipment operation could tax the electrical distribution system to the point where a permanent brown-out state could exist over much of the power company distribution network. Locations at ends of long electric distribution lines may experience chronic Brown-out conditions due to line loss. Intermittent heavy loads on this trunk circuit may cause the Brown-out effect to fluctuate with the load. Installations using ship-board or temporary power sources are especially prone to operation in a Brown-out mode. Usually of limited capacity, it is quite easy to overload the power source, giving rise to permanent Brown-out. (Permanent Black-out, if users are not careful). What are some common effects of Brown-outs?Brown-outs are the mother of all sorts of Bad Stuff. Power supplies in some electronic equipment may fall out of regulation. Errors, due to erratic power supply performance, may creep into computer operations.Other electronic equipment may function poorly - or not function at all. Marginally performing devices (electronic or electric) will probably cease operation entirely. Motors will overheat. Some motor types will slow down. Electrical interference will greatly increase. Increased interference may affect computer and communication operations. Off-line UPS units (the vast majority of lower cost units) continuously cycle between power line and internal battery operation. UPS batteries (generally sized to provide only 5 - 10 minutes back-up) will soon be discharged, unable to generate additional Back Up power. You are out of business. If system has not been shut-down, the entire system (UPS & computer) may snap back to life when power rises slightly, only to again shut down when the power line voltage falls back into the Brown-out zone. Such "ON-OFF" operational cycling is unhealthy for UPS, batteries and connected electronics. For Brown-out correction see our Voltage Regulator Page. Spikes generated by electrical machinery also greatly increase. Air conditioners, refrigerators and other motorized devices generate local spikes. Industrial machinery (often miles away) create additional spikes which may find their way unto the electrical distribution system, and into your sensitive, valuable equipment.