Unlikely, such a motor and the duration required would consume lots of battery power, the device wouldn't last long at all. The arousal inducer is there to induce arousal and complement the chastity regimen, not nullify it :)
Let's not discount other possibilities. As you'll see in the attached article, significant advances are being made in battery technology that could allow you to operate a more powerful motor for an acceptable time period before recharging. Please read: http://www.hashdot.com/pdf/Battery.pdf
Thanks!
http://www.medicaldevice-network.com/features/feature122/