Denso Develops World's Smallest, Lightest High-output Alternators - aftermarketNews

Denso Develops World’s Smallest, Lightest High-output Alternators

Denso Corporation has developed alternators that provide output currents of 165, 180, 200 and 220 amps; higher than the company's traditional alternators, which supply up to 150 amps. These new products, and all of Denso alternators, are the smallest and lightest in the world for their output.

LONG BEACH, CA — Denso Corporation has developed alternators that provide output currents of 165, 180, 200 and 220 amps; higher than the company’s traditional alternators, which supply up to 150 amps. These new products, and all of Denso alternators, are the smallest and lightest in the world for their output.

Denso’s 220-amp alternator, an air-cooled type with this output level, enables a large vehicle, which traditionally requires a larger, more expensive water-cooled alternator or two air-cooled alternators, to have only one compact air-cooled alternator.

“Vehicles, especially luxury models and large vehicles, now require higher output alternators, as vehicle power consumption increases, and engine revolution at idle is lowered to reduce fuel consumption,” said Mineo Hanai, managing officer of Denso Corporation responsible for the Electric Systems Business Group. “To meet these requirements, Denso developed the higher output alternators.”

In 2000, Denso developed the world’s first SC (segment conductor) alternator using a rectangular conductor for its stator coil, reducing coil resistance by 50 percent. In addition to the rectangular conductor, the SC alternator adopted dual windings and rectifiers, achieving smaller size, lighter weight, higher efficiency and lower noise.

To develop the smaller, higher power alternators, Denso further improved the stator coil connection method of the SC alternator. To solve the problem of higher heat production due to higher output, Denso increased the surface area of the rectifier cooling fins to nearly twice the size of conventional fins, improving the cooling ability of the rectifiers.

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