Torque ripple minimization of PMBLDC motor using simple boost inverter

Abstract

This paper proposes the implementation of simple boost circuit incorporated in inverter fed Brushless DC (BLDC) motor drive to boost the performance of torque. BLDC motor becoming subtle because of its performance. But the motor performance is inferior due to the voltage source inverter fed operation of BLDC motor which initiates torque ripple during commutation. Here the usage of Switched Boost Inverter (SBI) which minimizes the storage elements (passive elements), more active element and introduces shoot through mode during commutation as like Z-source inverter. The analyses of three phase switched boost inverter fed BLDC motor drive have been carried out. The performance of torque almost depends on the stator phase current of the motor. In BLDC motor during commutation interval, one phase loss its exact stator phase current hence it instigate ripple on the torque. The proposed method focuses two intentions to reduce the torque ripple. The first intension is to operate the BLDC motor at 180<sup>ᵒ</sup> electrical conduction mode, second intension is to introduce the shoot through interval to boost the dc link voltage so as to maintain the stator phase current control which leads to suppress the torque ripple during commutation. The validation of the proposed SBI based BLDC motor control is demonstrated both by MATLAB/Simulink and Field programmable gate array (FPGA) controller-SPARRTAN III processor. The experimental results of the developed SBI based BLDC motor drive is working over a wide speed range with minimal torque ripple compared to the normal PWM based inverter control.

Critical Aspects of Electric Motor Drive Controllers and Mitigation of Torque Ripple—Review

“…The main source of torque ripples for BLDC are the nature of motor, motor structure, and motor control. In [56] nature of BLDC can generate different torque ripples is shown in Fig. 12 The main challenge for BLDC is to improve the efficiency and reduce the torque ripple are discussed in the following section.…”

A comparative analysis of torque ripple reduction techniques for sensor BLDC drive

“…A fuzzy logic based PI controller is proposed for the comparative analysis of BLDC motor [20]. A simple boost converter is mentioned in [21] to minimize the torque ripple with less storage elements.…”

A comparison between six-step and sine-wave commutation methods for brushless direct current motors

“…The rotor position can be calculated using the information from the Hall sensors [14], [18]- [20] or electromotive force (back-EMF) [15], [16], [21]- [23]. While the 3-phase inverter is principally formed by three half-bridge circuits [10].…”