250W Elektrikli Bisikletin Kablosuz Güç Aktarımı ile Sabit Akım/Gerilim Modunda Şarjı

Öz

Elektrikli araçların kullanımı arttıkça; bu araçların pratik ve güvenli şekilde şarj edilmesi, önemli bir araştırma konusu olmuştur. Türkiye'de özel ehliyet gerektirmeyen elektrikli bisiklet kullanımı (250 W'tan daha az), son yıllarda önemli ölçüde artmıştır. Bu çalışmada elektrikli bisikletler için kablosuz şarj sistemi geliştirilmiştir. E-bisiklet üzerindeki 36V’luk batarya bankı, %72 genel sistem verimiyle (DC-DC) kablosuz olarak şarj edilmiştir.   Temassız güç aktarım hava aralığı, tekerlek çapı ve bisiklet şasesi dikkate alınarak 7.5 cm olarak belirlenmiştir. Primer tarafındaki anahtarlama frekansı, endüktif güç aktarımını sağlamak için 20 kHz olarak seçilmiştir. Sekonder tarafta ise batarya karakteristiğine uygun olarak çalışan bir şarj regülatörü geliştirilmiştir. Bu regülatör ile batarya karakteristiğine uygun olarak, sabit akım ve sabit gerilim kipinde şarj yapılabilmektedir. Böylece geliştirilen kablosuz şarj sistemi; pratik ve güvenilir olmasının yanı sıra, performans olarak da geleneksel kablolu şarj sistemi ile rekabet edebilir seviyededir.

Anahtar Kelimeler

• Elektrikli bisiklet; kablosuz güç aktarımı; batarya şarjı

Constant Current/Voltage Charging of A 250W E-Bike with Wireless Power Transfer

Öz

Practical and safely charge of the electric vehicle become important as their use increases. In Turkey, the use of electric bicycles (less than 250 W), which do not require special driving licenses, has increased remarkably in recent years. In this study, a system for wireless charging has been developed to practice the charging of e-bikes. The charging of the 36V battery bank on the e-bike is achieved with 72% overall system (DC/DC) efficiency. The air gap is 75 mm due to the wheel diameter and the bicycle chassis. The switching frequency on the transmitter side is selected as 20 kHz for inductive power transfer. On the secondary side, a charge regulator is designed to charge the battery according to its characteristic.  The constant current and constant voltage modes can be performed according to battery characteristic. Besides being practical and reliable, the overall performance of the developed system can compete with the conventional cable charging system.

Anahtar Kelimeler

• E-bike; wireless power transfer; battery charging.

Teşekkür

We would like to thank Volta Motor A.Ş. for their uninterrupted support during the study.

Kaynakça

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