DC Machinery Fundamentals PDF

DC Machinery Fundamentals CHAPTER 3 ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 1 DC machines – Definition ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 2 DC machines – Simple Rotating Loop ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 3 DC machi...

DC Machinery Fundamentals CHAPTER 3 ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 1 DC machines – Definition ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 2 DC machines – Simple Rotating Loop ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 3 DC machines – Simple Rotating Loop ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 4 DC machines – Simple Rotating Loop ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 5 DC machines – Simple Rotating Loop ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 6 DC machines – Simple Rotating Loop ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 7 DC machines – Simple Rotating Loop ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 8 DC machines – Simple Rotating Loop ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 9 DC machines – Simple Rotating Loop ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 10 DC machines – Simple Rotating Loop ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 11 DC machines – Simple Rotating Loop ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 12 DC machines – Simple Rotating Loop ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 13 DC machines – Simple Rotating Loop ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 14 DC machines – Simple Rotating Loop ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 15 DC machines – Simple Rotating Loop ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 16 DC machines – Simple Rotating Loop ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 17 DC machines – Simple Rotating Loop ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 18 DC machines – Simple Rotating Loop ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 19 DC machines – Commutation Problems. ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 20 DC machines – Commutation Problems. ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 21 DC machines – Commutation Problems. ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 22 DC machines – Commutation Problems. ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 23 DC machines – Commutation Problems. ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 24 DC machines – Commutation Problems. ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 25 DC machines – Commutation Problems. ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 26 DC machines – Commutation Problems. 1. The effect of flux weakening is simply to reduce the voltage supplied by the generator for any given load. 2. In motors, this effect increases the speed and then probably the load, resulting in more flux weakening. 3. It is possible for some motors to reach a runaway condition. 4. as a result of flux weakening, where the speed of the motor just keeps increasing until the machine is disconnected from the power line or until it destroys itself. ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 27 DC machines – Commutation Problems. ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 28 DC machines – Commutation Problems. ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 29 DC machines – Commutation Problems. ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 30 DC machines – Commutation Problems. ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 31 DC machines – Commutation Problems. ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 32 DC machines – Commutation Problems. ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 33 DC machines – Commutation Problems. ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 34 DC machines – Commutation Problems. The major disadvantage of compensating windings is that they are expensive, since they must be machined into the faces of the poles. Any motor that uses them must also have inter poles, since compensating windings do not cancel L.𝒅𝒊/𝒅𝒕 effects. Because of the expense of having both compensating windings and inter poles on such a machine, these windings are used only where the extremely severe nature of a motor's duty demands them. ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 35 DC machines – Power flow & losses ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 36 DC machines – Power flow & losses ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 37 DC machines – Power flow & losses ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 38 DC machines – Power flow & losses ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 39 DC machines – Power flow & losses ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 40 DC machines – Power flow & losses ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 41 DC machines – Power flow & losses ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 42 DC machines – Power flow & losses ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 43 DC machines – Power flow & losses ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 44 DC machines – Power flow & losses ENG. SAMER SARTAWI – MECHATRONICS ENGINEERING DEPARTMENT 45