The Design and Implementation of a BLDC Motor Drive with DTC

2011 ◽  
Vol 130-134 ◽  
pp. 2841-2845 ◽  
Author(s):  
Tze Yee Ho ◽  
Li Yuan Chen ◽  
Lung Hsian Yang ◽  
Wei Lun Lin
Keyword(s):  
Software Design ◽  
Direct Torque Control ◽  
Current Control ◽  
Torque Control ◽  
Motor Drive ◽  
Bldc Motor ◽  
Flux Linkage ◽  
Brushless Dc ◽  
Design And Implementation ◽  
Dsp Controller

This paper presents a brushless DC (BLDC) motor drive with direct torque control (DTC).The detailed hardware and software design are analyzed and designed. The performance of the BLDC employing DTC is compared with that of BLDC utilizing PWM current control. A prototype of BLDC motor drive based on the DSP controller with DTC control is implemented and validated by the exhibition of waveforms measurement for currents, torque, flux linkage, and speed. The experimental results not only verify the feasibility of designed system but also demonstrate that BLDC with DTC control has superior characteristics than that with PWM current control.

scholarly journals A solar fed BLDC motor drive for mixer grinder using a buck converter

2020 ◽  
Vol 10 (2) ◽  
pp. 1113
Author(s):  
Deekshitha S. Nayak ◽  
R. Shivarudraswamy
Keyword(s):  
Load Condition ◽  
Performance Comparison ◽  
Current Control ◽  
Buck Converter ◽  
Small Scale ◽  
Motor Drive ◽  
Bldc Motor ◽  
Brushless Dc ◽  
Photovoltaic Array ◽  
Simulated System

In large and small scale applications, different kinds of variable speed driving systems can be found. For saving the energy consumption of these devices, eco-friendly electronics are used, which lead to the development of the Brushless DC motor (BLDC). Its higher power density, higher efficiency, higher torque at low speed, and low maintenance enhances the use of a BLDC motor. The existing mixer grinder consists of the universal motor, which operates in alternating current supply due to high starting torque characteristics and simple controlling of the speed. The absence of brushes and the reduction of noise in the BLDC extends its life and makes it ideal in a mixer grinder. A solar-powered BLDC motor drive for a mixer grinder is presented in this paper. A DC-DC buck converter is utilized to operate the PV (photovoltaic) array at its maximum power. The proposed hysteresis current control BLDC system has been developed in the MATLAB. The commercially available mixer grinder is presented along with the proposed simulated system for performance comparison. It can be concluded that at the no load condition, the efficiency of the experimental existing mixer grinder is 51.03% and simulated proposed system is 81.25% and at load condition, the efficiency of the experimental mixer grinder is 49.32% and simulated system is 79.85%.

scholarly journals Direct Torque Control Of Permanent Magnet Synchronous Motor

2011 ◽  
pp. 27-30
Author(s):  
Anusha Mudili ◽  
P Devendra
Keyword(s):  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Current Control ◽  
Torque Control ◽  
Self Control ◽  
Control Mode ◽  
Flux Linkage ◽  
Matlab Program ◽  
Hysteresis Controller ◽  
Stator Flux

The DTC of PMSM is a kind of self control mode for its stator flux linkage and torque .It is very important that if stator flux linkage can be observed well and because the accuracy of the observer for stator flux linkage directly affects the performance of the DTC system of PMSM. In this paper ,for a torque drive with hysteresis controller in the current control loop will be implemented by writing a MATLAB program.

Acoustic Noise Reduction of BLDC Motor Drive Using One-Cycle Current Control Strategy

2014 ◽  
Vol 704 ◽  
pp. 385-389
Author(s):  
Hassan Moghbelli ◽  
Abolfazl Halvaei Niasar ◽  
Ehsan Boloor Kashani
Keyword(s):  
Control Strategy ◽  
Acoustic Noise ◽  
Torque Ripple ◽  
Position Estimation ◽  
Current Control ◽  
Motor Drive ◽  
Bldc Motor ◽  
Constant Frequency ◽  
Noise And Vibration ◽  
Brushless Dc

Torque ripple and resulted acoustic noise and vibration are the main disadvantages of brushless DC (BLDC) motor drives. In this study, One-Cycle Control (OCC) is developed for current regulation of brushless DC (BLDC) motor drive as a unified constant-frequency integration control strategy. Employing one-cycle control strategy reduces high frequency torque ripple of conventional hysteresis current controllers leading to lower acoustic noise and vibration in the drive. To enhance reliability and reducing drive cost, an improved rotor position estimation technique is implemented. OCC strategy and sensorless method are realized using a low-cost general-purpose AVR microcontroller (Atmega8). It is shown that torque ripple, acoustic noise and vibration are reduced via OCC method comparing to conventional hysteresis control strategy. Computer simulations and experimental results with a 375W, 16 poles BLDC motor, demonstrate improved behavior of developed sensorless BLDC drive operation.

Position Sensorless DTC of BLDC Motor Driver Based on Sliding Mode Observer

2013 ◽  
Vol 805-806 ◽  
pp. 954-957
Author(s):  
Song Lin Wang ◽  
Shun Yi Xie
Keyword(s):  
Sliding Mode ◽  
Direct Torque Control ◽  
Torque Ripple ◽  
Sliding Mode Observer ◽  
Torque Control ◽  
Current Loop ◽  
Bldc Motor ◽  
Rotor Speed ◽  
Brushless Dc ◽  
Commutation Torque Ripple

Direct torque control (DTC) which replaces the conventional current loop with torque loop can directly control the electromagnetic torque in order to reduce the torque error within the hysteresis bandwidth, and it can attenuated commutation torque ripple and the torque ripple of brushless DC (BLDC) motor with un-ideal back electromotive force (EMF) waveforms. Further, the key issue of feedback torque calculation in torque loop is the estimation of back-EMF in sensorless DTC of BLDC motor. So a sliding mode observer (SMO) is employed to estimate the back-EMF in real time. The torque and rotor speed can be derived from the estimated back-EMF. Simulation results demonstrate the proposed method is valid and effective.

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