Brushless Direct Current (BLDC) motors have gained popularity in recent years due to their high-power density. Many type of speed controller techniques have been developed and Proportional Integral Derivative (PID) controller has been the... more
Brushless Direct Current (BLDC) motors have gained popularity in recent years due to their high-power density. Many type of speed controller techniques have been developed and Proportional Integral Derivative (PID) controller has been the most widely used. However, PID's performance deteriorates during nonlinear loads conditions. Over the past five years, controllers have been developed to overcome this limitations in BLDC speed control, however the solutions are focusing on forward motoring only. In this paper, a speed controller for BLDC with seamless speed reversal using Modified Fuzzy Gain Scheduling is proposed. The proposed controller regulates the speed using Fuzzy Gain Scheduling 49 base rules. The controller was tested for six test cases and compared to PID and Self-Tuning Fuzzy PID controller. It is found out the proposed controller yields lowest steady state error, ess of 0.025 % during step-changing speed test case. Overall, Modified Fuzzy Gain Scheduling BLDC speed controller outperforms the other two similar controllers in variable speed conditions. The controller has potential to be used as bidirectional drive in highly dynamic load conditions. Abstrak Mutakhir ini motor arus terus tanpa berus (BLDC) telah mendapat perhatian komuniti system kawalan kerana prestasinya. Pelbagai jenis pengawal laju dihasilkan, Proportional Integral Derivative (PID) menjadi pilihan utama. Prestasi PID merosot ketika beban tidak linear. Pengawal laju lain telah dikembangkan untuk mengatasi had ini sejak lima tahun kebelakangan ini berfokus pada permotoran ke hadapan sahaja. Dalam kertas ini, Penjadualan Fuzzy Gain yang diubah suai untuk pengawal kelajuan BLDC dengan pembalikan arah yang lancar menggunakan comutasi secara berterusan adalah dicadangkan. Pengawal ini menggunakan 49 peraturan Penjadualan Fuzzy Gain. Pengawal ini telah diuji dengan enam kes ujian dan dibandingkan dengan pengawal laju PID dan Self-Tuning PID Fuzzy. Pengawal laju ini mempunyai steady state error, ess of 0.025 % yang rendah ketika ujian berubah laju. Keseluruhanya, pengawal kelajuan Fuzzy Gain Penjadualan yang diubah suai mengatasi prestasi pengawal laju yang lain ketika keadaan laju boleh ubah. Pengawal laju ini mempunyai pontensi untuk digunakan sebagai pemacu dwiarah ketika beban yang bersifat dinamik.
Research Interests:
—Brushless Direct Current (BLDC) motors have attracted a lot of attention due to their performance capabilities. The Proportional Integral (PID) controller remained popular due to its simplicity. However, PID's performance deteriorates... more
—Brushless Direct Current (BLDC) motors have attracted a lot of attention due to their performance capabilities. The Proportional Integral (PID) controller remained popular due to its simplicity. However, PID's performance deteriorates during nonlinear loads conditions. Controllers have been developed to overcome the limitations of the PID controllers but focused on forwarding motor only. Furthermore, lack of literature regarding the bidirectional speed control of BLDC motor has been reported. In this paper, a Hybrid Fuzzy-PID speed controller for BLDC with seamless speed reversal using direct commutation switching scheme was proposed. The controller uses Fuzzy rule base and the switching scheme for bidirectional operations. MATLAB/Simulink was used to develop and test the controller. The controller was tested for several test cases and compared to a ZN-Tuned PID controller. The controller performed efficiently for all the test cases and has better results compared to the PID controller under same test cases.