Figure 2 Developing a Sine-Wave Voltage

AC GENERATION Basic AC Theory The induced voltages add in series, making slip ring X (Figure 1) positive (+) and slip ring Y (Figure 1) negative (-). The potential across resistor R will cause a current to flow from Y to X through the resistor. This current will increase until it reaches a maximum value when the coil is horizontal to the magnetic lines of force (Figure 2, 90^o). The horizontal coil is moving perpendicular to the field and is cutting the greatest number of magnetic lines of force. As the coil continues to turn, the voltage and current induced decrease until they reach zero, where the coil is again in the vertical position (Figure 2, 180^o). In the other half revolution, an equal voltage is produced except that the polarity is reversed (Figure 2, 270^o, 360^o). The current flow through R is now from X to Y (Figure 1). Figure 2 Developing a Sine-Wave Voltage ES-07 Page 2 Rev. 0