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NICHICON Launches the UXY Series of Vibration-Resistant,Lead-Type Aluminum Electrolytic Capacitors

2018-01-18 | Return

NICHICON CORPORATION has applied its simulation technology toward the development of the UXY series of lead-type aluminum electrolytic capacitors. These capacitors utilize a high vibration-resistant structure that is optimized for vibration required by the market for automotive applications.

This product was displayed 9th EV & HEV Drive System Technology Expo, held at Tokyo Big Sight on Wednesday, January 17, to Friday, January 19, 2018. It will also be on display at the Applied Power Electronics Conference (APEC 2018) being held in San Antonio, TX from March 5 to March 7, 2018

Overview/Development Background

In recent years, the placement of the engine control power train ECU as well as other control units have been moved from the cabin to the engine compartment as a result of their placement directly on the engine and transmissions the demands for high vibration resistance has increased. The UXY series was developed to meet these market demands.

In conventional products, there is a gap between the element and case which allows the element to shake, and increases the risk of disconnection of the lead terminals in high vibration environment. This series of products addresses the issue by using slits at the side of the capacitor case. These slits reduces stress on the lead terminal and therefore increases vibration resistance. When developing this case, we used simulation technology to compare the amount of stress placed on the lead terminals as the number of slits varied. Figure 1, shows the simulation results for the different number of slits. This simulation indicates that that stress on the lead terminals tends to decrease as the number of slits increases, with the stress reduction tending to taper off after six or more slits. Taking into consideration the tradeoff between the safety of case processing and increasing the number of slits, we therefore decided to use six slits. We launched the UXY series after confirming vibration resistance through actual testing of the cases with slits.

Features

As in-vehicle applications require high capacity, product sizes increase. However, as product size becomes larger, the vibration resistance tends to decrease because of an increasing amount of stress placed on the lead terminal bases. To solve this problem, we employed a new, proprietary structure to realize a larger-size product (φ18 x 31.5L, φ18 x 40L) able to handle up to 40G of vibration acceleration and high temperatures of 125°C and 135°C.

With this series lineup, NICHICON believes it can meet demands for high vibration resistance in various in-vehicle control units. By using a case with slits, we have realized a capacitor whose vibration resistance does not change over time.

Main Specifications

Rated voltage range: 25 to 50V

Rated capacitance range: 2300 to 11,000μF

Product dimensions: φ18 x 31.5L , φ18 x 40L

Life: Guaranteed 3,000 hours at 125°C; guaranteed 3,000 hours at 135°C (with allowable ripple current derating)

Terminal shape: Lead type

Samples: Being provided

Mass production: From January 2018

Production plant：NICHICON (OHNO) CORPORATION
1-11-2 Shimoyoro, Ohno-shi, Fukui Pref.,
(ISO 9001, ISO/TS 16949 and ISO 14001 certified)

Anti-vibration performance

Category	performance
Vibration	After testing the following vibration conditions at room temperature (15 to 35°C), satisfies the following when measured to return to 20°C
	Rate of change in capacitance	Within ±5% of initial value
	tanδ	Below initial standards
	Leakage of current	Below initial standards
	Vibration conditions
	Vibration frequency range	10 to 2,000Hz
	Amplitude or acceleration	Total amplitude of 1.5mm or 392m/s2 (40G), whichever is looser
	Sweep rate	0.5 octave/minute
	Vibration direction and time	Two hours each in the x, y, and z directions, for a total of six hours
	Fixed	Fixed the product and its leads in a fixture (inquire for details)

Source：http://www.nichicon.com/