Predictive Control of Low-Cost Three-Phase Four-Switch Inverter-Fed Drives for Brushless DC Motor Applications

Abstract

In this paper, an efficient control strategy for threephase four-switch inverter-fed Brushless DC Motor (BLDCM) drives with trapezoidal back Electromotive Force (EMF) is proposed. In the proposed approach, the outer control loop for adjusting the motor speed is designed using Model Predictive Control (MPC) while the inner control loop based on a hysteresis controller regulates the BLDC phase currents. To effectively adjust the current of the uncontrolled phase in the fourswitch inverter, efficient switching strategies for motor and generator modes are suggested. The proposed control scheme achieves favorably low torque ripples and improves the speed transient response in terms of tracking error and speed overshoot/undershoot. Therefore, it can be an ideal candidate for low-cost low-power BLDCM applications. Also, the MPC-based speed control loop is tuned by solving a suitable cost function in an offline manner to minimize the real-time computational effort. Using the foregoing technique, it is shown that the implementation of the proposed MPC-based controller becomes as simple as the PI controller while the MPC-based controller achieves superior control performance. The proposed BLDCM drive scheme is experimentally verified in a Hardware-in-the-Loop (HiL) test setup with a 1200W BLDCM and dSPACE1104 development board. The experimental results demonstrate the benefits of the proposed drive system.

A Review of BLDC Motor: State of Art, Advanced Control Techniques, and Applications

“…[151] Controlling input voltage Quadral-duty digital PWM-based pulses are generated to control the inverter part of the motor controller which efficiently controls the torque and flux parameters of the BLDC motor. [152] Intelligent control A BLDC motor controller is designed in which the outer torque controller is developed with the help of a model predictive algorithm. The designed control algorithm works in offline mode.…”

Comparative Study of BLDC Motor Drives with Different Approaches: FCS-Model Predictive Control and Hysteresis Current Control

“…The cost function of the current-controlled FCS-MPC algorithm is formulated in Equation (46). The cost function aims to minimize the absolute error between the reference and actual stator current components in (α-β) coordinates.…”

“…However, a current controlled scheme using hysteresis current controllers is still one of the most applicable techniques, with profound applications in conventional motor drives, such as induction and synchronous motors, due to the technique's ease of implementation and relatively low cost [43][44][45]. In [46], the authors combine the model predictive control approach (as the speed controller) and the hysteresis current controllers (for stator current control). A robust discrete-time full-state feedback control law is employed in [47] to achieve a fast dynamic response with reduced overshoot for variable speed BLDC motor drives.…”

Modelling and Simulation of Three-Phase Four-Switch Voltage Source Inverter With Space Vector Modulation

“…Recently, the FSTPIs have been proposed for low-cost brushless DC motor drive applications in [9][10][11]. In [9], a current control scheme of brushless DC motors driven by four-switch three-phase inverters was proposed.…”