Simulation Research Of Brushless DC Motor Using Conduction-Angle All Speed Range Control

Brushless DC (BLDC) motors gaining popular and wide application with virtue from DC motor and AC motor, such as motion control applications, industrial application, consumer appliance, aerospace and automotive applications. Because of its cost, the application of BLDC motor has been restricted. Conduction-Angle control is a simple, reliable digital control technique for BLDC motor dives, which is proposed by Fernando Rodriguez and Ali Emadi. This method is ease of developing ASIC and the control of BLDC motor drives is low cost.The control principle of BLDC motor and basic formulae are given in this paper. Then the principle of Conduction-Angle control and the method of the controller design are given in the paper. The range of rotor speed and fixed load make it used in limited area. Subdivision control of speed and torque for expanding the range is proposed in this paper. It is very difficult to measure the load in practice, so the selection of torque range is a problem. For this problem, the method of torque selection according as the range of rotor speed variety is proposed. Though the theory analysis, calculating methods of control system parameters are proposed. The proposed principle is proved availably in theory. Based on it, the integrated design method of all range Conduction-Angle controller is proposed. According as mathematical model of BLDC motor and using MATLAB/SIMULINK, the simulation model of BLDC motor is be built. The proposed controller is carried out simulation using Stateflow and SIMULINK block. The simulation results show the idea of proposed controller design is availability. The method which is based on Conduction-Angle all speed range control for BLDC motor makes the Conduction-Angel control which is a novel control technique for BLDC motor gained wider applications.