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CDI Capacitor Manufacturers in India

Deki Electronics is one of the largest CDI Capacitor Manufacturers in India. We are manufacturing & supplying the best CDI Capacitor in India at the very competitive price. To get more information about the CDI Capacitor Manufacturers in India, then just you can visit at http://www.dekielectronics.com/pdf/cdi-capacitors.pdf

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CDI Capacitor Manufacturers in India

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  1. The spark necessary to ignite the air / petrol mixure in the combustion chamber is produced by the CDI module

  2. • What is CDI capacitor ? CDI is capacitive Discharge Ignition and the capacitor which is used in CDI application is called CDI capacitor. it is used in automobile application.

  3. How is it work? • In automobile 12 volt from battery is converted in to 400 volt DC. This voltage is charging voltage. The capacitor is charged to this voltage. Then it is discharged through primary of ignition coil. In secondary of ignition coil we get 5 KV to 20 KV. which is used to produce the spark in the spark plug.

  4. BLOCK DIAGRAM

  5. CDI CAPACITORS • Critical parameters for this application: • Application is basically Charge / Discharge application. During the positive half cycle capacitor is charged and during the negative half cycle capacitor is discharged through coil with very low resistance. • Requirement is Higher current carrying capability. Critical parameter for capacitor Quality is End contact quality.

  6. CDI CAPACITOR • Common cutting techniques are with a standard blade or a roller blade. Both techniques give parallel edges of the film. And this means that the accessible electrical contact of the capacitor is limited due to the thickness of the metal layer itself times the meters of film used for the capacitor. cutting a similar result, geometry for the Free margin Stagger

  7. CDI CAPACITOR • A first improvement to enlarge the area of contact was the heavy edge metallization, sometimes also named reinforced edge. Free margin Stagger

  8. CDI CAPACITOR • The idea to enlarge the contact zone any further led to a new technology, which is nowadays commonly known as wave cut. This is a special cutting technique, which allows to influence the contour of the cutted edge.

  9. CDI CAPACITOR Technical terms about wavecut 20 wace cut at contact side 0 amplitude -20 wave length slit width -40 free margin -60 -90 0 90 180 270 360 450

  10. CDI CAPACITOR • Advantages are • Larger area of contact  • minimize the tan due to end spraying effects • gain better contact, which allows better pulse behavior dU/dt • and this means higher current carrying facilities.

  11. CDI CAPACITOR • Deki CDI capacitors are made with special film. • Available in both Metalised Polyester / Metalised PolyPropylene versions. • Metalised Polyester type is recommended for Lower discharge current rating say up to 40 A discharge current. • Metalised Polypropylene type is recommended for Higher discharge current say up to 100 A discharge current.

  12. • MPET In MPET Operating temperature is between -55°C to 125°C. Tan δ of MPET is higher. • MPP In MPP Operating temperature is between -55°C to 105°C Tan δ 0f MPP is lower.

  13. Tan δ vs frequency

  14. Test condition for MPET volt: 350 V Freq: 150Hz Cur :42 A Time:300Hrs

  15. Test condition for MPP volt: 400 V Freq: 200Hz Cur :80 A Time:300Hrs

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