BLDC motor has the high efficiency, high power density, low acoustic noise, and low maintenance cost due to
the removal of the mechanical commutators and brushes. In the general design and driving control technology
about BLDC motor, the square waveform phase current has been known as the ideal current waveform to get
high torque production and high efficiency driving characteristics. But in here, the kinematic vector characteristics
of magnetic force between stator and rotor pole is not considered. Conventionally recommended square
wave current has no consideration about this vector angular feature of magnetic force. This paper studied
about this vector potential separation of magnetic force during torque production to generate maximum torque
per ampere (MTPA). The modified current waveform for MTPA is suggested by this study. In addition, this
paper also suggests 2-step voltage control method for MTPA and high efficiency driving. The optimal voltage
control condition is derived by DOE (Design of Experiments) and RS (Response Surface). This suggested control
method is validified by finite element analysis (FEA) using voltage source operation to simulate real driving
condition. As a result, the suggested control method can be a good driving control technology to maximize
the output torque per ampere and improve the driving efficiency.