A controller of PMSM for elctrical bicycle with hall effect sensors
In this paper, rotor position and speed estimation method using hall-effect sensors for low-cost vector controller design is presented for Permanent Magnet Synchronous Motor (PMSM). Sensorless control and self-learning implementation was also realized based on theoretical analysis. Experimental results verified the feasibility of the proposed control strategies.
A simple fault tolerant control system for Hall Effect sensors failure of BLDC motor
This paper presents a novel fault tolerant control system for Hall Effect position sensors failure of permanent magnet brushless DC (BLDC) motor in a closed loop control scheme. The proposed system is capable to detect and identify the Hall Effect sensors breakdown based on sensors signals and Discrete Fourier Transform (DFT) analysis of the measured line voltages of motor. In this paper behavior of BLDC motor is studied for Hall Effect sensors breakdown through simulation model. BLDC motor simulation model were validated first by experimental data under no fault condition. Analyzing the simulation results of the various sensor breakdowns leads to develop an expert system for Hall Effect sensors failure diagnosis in BLDC motor. A simple method is presented to generate the commutation signal of faulty Hall Effect sensor to maintain the proper operation of BLDC motor after fault occurrence. The proposed fault tolerant control system does not need massive computational efforts and can be implemented as a subroutine in the main control program of the BLDC motor. The simulation results show correct performance of the proposed fault tolerant control system.
Integration of an axial flux brushless motor for home automation
This paper outlines the steps in designing an electrical drive with a brushless motor for home automation. Two purposes have been taken into account. First is the need of effective integration among the involved fields, i.e. motor design, control algorithm evaluation,. data transfer requirements, component integration in a domestic network. Second is the accurate choice of solutions compatible with low-cost technologies. The drive here considered is based on an axial flux brushless motor and emphasis is put on position and speed transducers, which constitute elements of weakness into the drive and contribute significantly to the total cost of low power applications. The key section in the control algorithm is the angular position detection and angular speed estimation. This is based on a set of three Hall effect sensors which seems to be a very low cost solution, offering, a good start point for more precise position reconstruction. The drive connection to a commercial communication network is finally discussed and proposed.