High-efficiency and energy-saving appliances applications is the DC AC power inverter primary issue. Three-phase brushless DC motor because of its high efficiency and small size advantage and is widely used in home appliances as well as many other applications. Furthermore, since the electronic commutation means instead of mechanical commutator, a three-phase brushless DC motor is considered more reliable.
Standard three-phase power stage (power stage) is used to drive a three-phase brushless DC motor, shown in Figure 1. Generating an electric field power level, in order to make the motor work well, the electric field must be maintained between the rotor angle close to 90 °. Six-step sequence to produce six stator flux control vectors, these vectors must change in a given rotor position. Hall-effect rotor position sensor scan. In order to provide 12 volt power inverters the rotor current step 6, the power level by using six different specific sequences can switch the power MOSFET.
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