Cornell is tough. Even tougher for engineering students. There will be days you feel like your the stupidest kid in the program, and you'll wonder if you belong with everyone else. But then you remember that your experience at Cornell shouldn't be shaped by your performance relative to everyone else. Rather, your experience there should be shaped by how much you've saturated yourself in the learning environment. There is no better place to expose yourself to all sorts of knowledge than Cornell.
Back-EMF Motion Feedback. INTRODUCTION. Electromotive force (EMF) refers to the voltage generated by a spinning motor. Measuring this voltage in order to determine the rotational speed of a motor is commonly called Back-EMF since the voltage tends to push-back against the circuit driving current into a motor's windings.
It is generally defined as the electrical potential for a source in a circuit. A device that supplies electrical energy is called a seat of electromotive force or emf. Emfs convert chemical, mechanical, and other forms of energy into electrical energy. The product of such a device is also known as emf. The word force in this case is not used to mean mechanical force, measured in newtons, but a potential, or energy per unit of charge, measured in volts. In electromagnetic induction, emf can be defined around a closed loop as the electromagnetic work that would be done on a charge if it travels once around that loop.