Direct current and AC power

1. Alternating current and DC power

The current of the size and direction of periodic changes over time is called alternating current, referred to as AC power (AC). A variety of battery-supplied currents flow in only one direction, called direct current (DC).

2. Principle of single-phase alternating current generator

3. Three-phase electric generator principle

The three-phase electrical principle of the animated video see:

Http://my.tv.sohu.com/us/63329005/21188120.shtml http://tieba.baidu.com/p/4331769031