When choosing the best driver, pulse width modulation (脉宽调制)IC is increasingly recognised as one of the preferred technology. The choice of best driven only depends on the efficiency. Linear circuit to highlight shortcomings in the end, the output level is approximately 50%. In the 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 the medium power level drivers with resistive loads, linear control circuit a 50%
the lowest efficiency. now let us consider a PWM solution. In the PWM control system, simulation input level is converted to be duty ratio signal switch driver. From an electrical switch to another state of the process, which is & other OFF and ON; ” “ ” the changes between, known as the modulation, this is why the technique is called pulse width modulation. First duty ratio is zero, which has been in the OFF state, when the motor begins to spin, duty ratio increase, usually until the motor speed will be needed to achieve using the / and or torque. The question remains, what is yet to be further? with brushless motor control required for the specific functions of micro controller, and to provide energy to the motor and micro control and the interface between the PWMIC brushless motor drives has started to come out. But in order to provide designers they forced the
cut need brushless integrated control circuit functions, there are still a lot of work to be done in this field.
