• Electrolytic capacitors hold much more charge;
• Electrolytic capacitors have to be connected with the correct polarity, otherwise they can explode.

If we pump electrons onto the negative plate, electrons are repelled from the negative plate.  Since positives do not move, a positive charge is induced.  The higher the potential difference, the more charge is crowded onto the negative plate and the more electrons repelled from the positive plate.  Therefore charge is stored.  The plates have a certain capacitance.  

Capacitance is defined as the charge required to cause unit potential difference in a conductor.

A very good example would be a capacitor used on audio electrical devices such as in a car sound system setup. The capacitor is the one responsible for storing sufficient energy into the amplifier so that it won’t have to steal for electrical currents from the car battery to be able to output energy-consuming low frequency bass sounds. Since capacitors can store electrical currents for an indefinite period of time even if it is not hooked up to any power source, then a capacitor can be extremely dangerous when not discharged correctly. So if for some reason you will need to have the capacitor uninstalled or removed, it has to be discharged properly and completely. This is so accidental electrocution which could be potentially fatal to you can be avoided. Also, damaging power surges that can burn up or cause short circuits on the components of the electrical device can be prevented. Use these tips for discharging a capacitor. Here’s how to understand some methods to discharge a capacitor.

Observe the important safety measures prior to discharging the capacitor. As was earlier said, capacitors hold electric currents even when not connected to any power source. This being said, capacitors, especially those with high capacitances, can hold substantial loads of electric currents for days. These could go off and spark causing electrocution and short circuits when discharging is not properly done. This is why it is important to arm yourself with the necessary safety gears especially if you’ll be discharging a high-voltage capacitor. Never attempt to discharge a capacitor without protective goggles shielding your eyes. There have been cases where fragments of the tools used to discharge the capacitor flew off in sparks. Also, it would be advisable to wear a pair of highly insulated utility gloves for added safety as this will help minimize the electrical currents that will course through your body in case you get electrocuted. And of course, using the right tools and materials for discharging the capacitor is very crucial. While you can always improvise on these, you increase the odds of getting into accidents.

Discharging a capacitor simply means giving the stored electrical currents a path out of the apparatus. To discharge a small capacitor, touching the two lead terminals with the tip of screwdrivers with insulated handles should do the trick. However, this is not recommended, except of course if you’re a mechanic or electrician with years of experience in the said matter. Handling high-voltage capacitors, on the other hand, is a different story altogether. You have to attach the supplied resistor or test light onto the capacitor’s terminals to safely dissipate the stored electrical currents.

To make sure that you completely discharge the capacitor after following the aforementioned steps, you can touch the terminals with the tips of the screwdriver once more. Alternatively, have a light bulb handy for the purpose. Simply touch its threaded base onto one of the capacitor’s terminals. If it still contains electrical charges, it will light the bulb up. 

capacitors

Any electronic device has the essential component: capacitor. It has a variety of types and uses. Take an example, a capacitor must be used on audio device such as in a car sound system setup. The capacitor is the one responsible for storing sufficient energy into the amplifier so that it won’t have to steal for electrical currents from the car battery to be able to output energy-consuming low frequency bass sounds. A capacitor can be extremely dangerous when not discharged correctly, Since capacitors can store electric currents for an indefinite period of time even if it is not hooked up to any power source. So if for some reason you will need to have the capacitor uninstalled or removed, it has to be discharged properly and completely. This is so accidental electrocution which could be potentially fatal to you can be avoided. Also, damaging power surges that can burn up or cause short circuits on the components of the electrical device can be prevented.

As was earlier said, capacitors hold electric currents even when not connected to any power source. So observe the important safety measures prior to discharging the capacitor. It is important to arm yourself with the necessary safety gears especially if you’ll be discharging a high-voltage capacitor. Never attempt to discharge a capacitor without protective goggles shielding your eyes. Because capacitors, especially those with high capacitances, can hold substantial loads of electric currents for days. These could go off and spark causing electrocution and short circuits when discharging is not properly done. There have been cases where fragments of the tools used to discharge the capacitor flew off in sparks. Also, it would be advisable to wear a pair of highly insulated utility gloves for added safety as this will help minimize the electrical currents that will course through your body in case you get electrocuted. And of course, using the right tools and materials for discharging the capacitor is very crucial. While you can always improvise on these, you increase the odds of getting into accidents.

capacitor01

Discharging a capacitor simply means giving the stored electrical currents a path out of the apparatus. To discharge a small capacitor, touching the two lead terminals with the tip of screwdrivers with insulated handles should do the trick. However, this is not recommended, except of course if you’re a mechanic or electrician with years of experience in the said matter. Handling high-voltage capacitors, on the other hand, is a different story altogether. You have to attach the supplied resistor or test light onto the capacitor’s terminals to safely dissipate the stored electrical currents.

To make sure that you completely discharge the capacitor after following the aforementioned steps, you can touch the terminals with the tips of the screwdriver once more. Alternatively, have a light bulb handy for the purpose. Simply touch its threaded base onto one of the capacitor’s terminals. If it still contains electrical charges, it will light the bulb up.

Do you pay attention to the electrical and electronics news and affairs, what happened everyday in the areas? Recently there are two events happened in the field. Let’s take view of them.

The first is from India: In a bid to reinforce its leading position in the field of Energy Efficiency, Schneider Electric today announced the acquisition of Meher Capacitors of the Meher group, a leader in the Indian Power Factor Correction (PFC) market.

MEHER has pioneered and nurtured the design and manufacture of Self Healing Power Factor Correction (PFC) Capacitors & Systems in India since the early eighties and currently possesses state of art technologies as well as comprehensive products & solutions for PFC, Harmonic Filtering & Network analysis. In addition it has in active development technology platforms which are essential for the evolution of future generation PFC Capacitors.

Speaking at a press conference here, Schneider Electric Country President Oliver Blum said with the buy out the company added another significant facet to its leadership position in energy efficiency in India.

 Without revealing the future investments in India, he said the French electric major was looking to grow four-fold in India in the next five years and the take over would help it to grow five-fold in four years in the PFC business.

 ”It was a logical step to acquire Meher PFC as now we can offer a unique and comprehensive portfolio in the field of energy efficiency encompassing measurement, power quality correction, automation and monitoring,” he said.

 Refusing to reveal the size of the deal, Mr Blum merely stated that Meher PFC had a turnover of Rs 40 crore in FY 09.

Mustafa Wajid, CEO, MEHER Group, said: ‘The transaction with Schneider Electric is yet another recognition of MEHER’s multi-faceted strengths & capabilities, and of the position it held in the business of Power Factor Correction. The combination of MEHER’s technology, its team and Schneider Electric’s strong international presence creates a powerful force which will accelerate movement towards global leadership in the Power Factor Correction domain. We at MEHER see this development as an important milestone in our growth journey.’

Schneider Electric offers integrated solutions across multiple market segments, including leadership positions in energy and infrastructure, industrial processes, building automation, and data centres/networks, as well as a broad presence in residential applications in more than 100 countries.

The second comes from Panasonic: Panasonic is moving production of speakers and capacitors to other plants, cutting about 90 jobs at its Forks of the River location.

Panasonic currently produces assembled speakers, capacitors, and foil for capacitors at Forks of the River.

The speaker production is moving to Reynosa, Mexico. The capacitor production is moving to a plant in Malaysia.

Assistant General Manager of General Affairs Clark Brandon said the speaker plant move is a consolidation into one production facility. Brandon said the capacitor plant move is due to the bulk of the company’s customer base being in southeast Asia.

The design and program management teams are set to stay in Knoxville.

The Forks of the River facility will lose about 90 of its 170 current employees. In 2002, there were 725 Panasonic employees at Forks of the River.

The company will use Department of Labor funds to help with job training and placement for displaced workers.

EDA Model

One use of volatage regulator

Since it is a low dropout voltage regulator, NJM2835 significantly reduces the power loss that occurs with conventional three-channel regulators triggered by differences in electric potential between input and output, reducing power consumption in electronic equipment.

The small-size 2.2µF ceramic capacitor compatibility and built-in bypass capacitor contribute to downsizing of the mounting board.

NJM2835 is a 500mA output low dropout voltage regulator featuring ceramic capacitor compatibility, high precision output (±1 percent), high ripple rejection ratio, low noise and maximum input voltage of 20V.

With its wide output voltage coverage of 2.1V-15.5V (0.1 step) and 500mA output current, the NJM2835 can be applied to the power sources of CDDs (12V system), A/V equipment (8-9V system) and motors (12V system).

The NJM2835 is suited for applications that are incompatible with the conventional model, NJM2830 (20V maximum input voltage Io=300mA), because of its low output current.