[QUOTE="PhilCorso, post: what does that mean Q.E.D ?
Hi. I want to run a 3 phases dc direct drive washing mashine motor from a 12 v baterry. What do I need? ThanksIt seems people are getting confused about motor technology. A DC brushless motor can indeed be 3-phase. In fact, 3-phase is the most common. This refers to the number of electrical phase windings on the motor. It is switched via a 3-phase power "bridge" from a DC voltage supply. This "bridge" consists of 6 power devices - normally IGBTs, but sometimes MOSFETs. They use pulse-width modulation to control the power, and the order in which the 3 motor phases are energised determines the direction of rotation.
I know this stuff because my job is to design and write embedded software for DC brushless motors in home appliances, and also help design the hardware that drives them.
by Seth Price
by Seth Price