i am building a solar electric bicycle for my final year project,in our project we are using solar panel to convert solar energy into electric energy and that energy will be stored in the battery. now we require brush-less DC motor to start the bicycle. so which torque equation should i use to calculate torque power and also how to decide the rating of the motor?? we are using solar panel of 12 V and also battery of 12 V and also using DC-DC boast converter to step up the rating of 12 v to the volts which we require for the bicycle. so please help me out with this.. but first of all i have to decide the torque power and torque rating of motor because based on motor rating only i can decide the rating of solar panel and battery. so please tell me how to calculate motor torque and also tell me the torque equation.