With brush and brushless motor is whether configuration has the most significant difference between common brush -The commutator. Over the past century, a commutation of brushless dc motor has been through graphite brush and mounted on the rotor commutator ring in contact. While by hall sensor brushless motor (Hallsensor)Put back the rotor position feedback control circuit, make its can learn motor phase commutation (Order)The accuracy of the time. Most of the brushless motor manufacturers production positioning with three hall effect sensors. Because of brushless motor without brush, so also does not have relevant interface, therefore more clean, acoustic noise smaller, in fact, no maintenance, longer life. So, what is yet to be further? Although the understanding of the advantages of a brushless motor motor industry in deepening, but so far work is still limited to develop the brushless motor hall sensor control electronic components. Current to the motor drive box and motor drive card development demand is very urgent, they can provide designers with micro controller, programmable ability and drive, and all these functions are integrated in a single package. Whether in the digital or analog mode, is essentially this integrated approach to complete all necessary reversing motor applications. Without this integration, brushless motor will not work. When choosing the best driver, pulse width modulation (脉宽调制)IC is increasingly recognised as one of the preferred technology. Only depends on the selection of optimal drive efficiency. Linear circuit to highlight shortcomings in the end, the output level is about %. In this output electricity at ordinary times, the impedance of the bypass element is equal to the load impedance, which means that the heat generated by the amplifier is equal to the power supply load! In short, when to medium power level drivers resistive load, low efficiency of linear control circuit in %. Relative to the one hundred - year - old has a brush motor, brushless motor cleaner, tiny and light, and is steadily developing forward rapidly. For they are stable and the increasing popularity, with only 'is the time' to summarize clearly too conservative. Just a few years ago, brushless motor is far more expensive than a brush motor. But thanks to design the progress of technology and material technology, its prices sharply lower. Today, the cost difference between two kinds of motor technology only %. And the most significant change is designers began to work closely with industrial application. Traditionally, it is considered to belong to hardcore type has a brush motor applications, because 'clean' is not the most important work environment. But now, due to lower cost barriers, brushless motor, gaining new applications.
