A New Approach to DTC Method For BLDC Motor Adjustable Speed Drives

Abstract

This paper proposes a new approach to direct torque control (DTC) method for brushless direct current (BLDC) motor drives. In conventional DTC method, two main reference parameters are used as: flux and torque. In this paper, the new approach has been proposed to improve the BLDC motor dynamic performance. A main difference from the conventional method of it was that only one reference parameter (speed) was used to control the BLDC motor and the second control parameter (flux) was obtained from speed error through the proposed control algorithm. Thus, the DTC performance has been especially improved on systems which need variable speed and torque during operation, like electric vehicles. The dynamic models of the BLDC and the DTC method have been created on Matlab/Simulink. The proposed method has been confirmed and verified by the dynamic simulations on different working conditions.

Parallel Loop Control for Torque and Angular Velocity of BLDC Motors with DTC Commutation

“…The horizontal axis α is fixed alongside the a axis and the vertical axis β, which leads axis α by 90 • . The transformation is carried out analytically, by means of the Clarke's transformation matrix [7], as follows:…”

Control of an Induction Motor with Double ANN Model Based DTC

“…Unlike the FOC, the DTC model needs only one motor parameter in the modelling of the control system. Thus, the DTC is considered to be more simple and reliable [9].…”

Prognosis Of BLDC Drive Faults Using Autoregressive Integrated Moving Average Algorithm

“…BLDC drive is affected by both external and internal faults. Bearing faults and demagnetization faults are the internal faults, and both will affect the BLDC drive [16][17]. Continuous wavelet transform (CWT) and Discrete Wavelet Transform (DWT) are used to determine the time frequency domain and also to overcome the fault that occurs in the BLDC drive [18].…”