VLT® AutomotionDrive installed in Opel vehicle to regulate power
Rudolf Bosnjak has installed a VLT® AutomotionDrive in his Opel vehicle to regulate the power from 47 12-volt batteries in the boot of the car. The Danfoss Drives frequency converter transforms direct current from the batteries to a 3-phase alternating current, which runs the motor and controls the speed.
Spomenko Hulak, from the competence centre for High Power Drives in Croatia, met Rudolf Bosnjak by chance. The Bosnian ideas man had come across a Danfoss frequency converter which had been leftover after a service visit to Sarajevo. He made a telephone call and was given permission to use it for his experiment.
Spomenko Hulak says that he spent several evenings talking on the phone to the Bosnian inventor, who managed to make his car drive with the frequency converter one month later.
Rudolf Bosnjak, who trained as an electronic engineer, now hopes to convert more cars. He says: “My target is to produce electrically-powered cars which do not emit CO2 but, right now, I don’t have the funds to develop and improve the car further. Now it needs new batteries, which will also reduce the weight.”
The electrical motor provides rapid acceleration; when the car is breaking, the motor works as a generator, returning energy to the batteries.
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The car’s batteries can be fully charged after five-seven hours, giving the car enough power to drive for up to two hours.