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The paper describes the process of creating of BLDC's digital control system. The BLDC has no speed sensor, so back-EMF method is used for commutation control. Authors show how to model the control system in MatLab/Simulink and to test it onboard STM32F4 microcontroller.
BLDC motors and their drives are gaining attention day by day from various industrial and household appliance manufactures because of its high efficiency, high power density, high torque, and low inertia, less noise, compact form, almost no maintenance, salient operation, and reliability. The BLDC motor can also be thought of an intermediate between a DC motor and a synchronous motor, which extracts...
This paper compares various electrical motors being used in a residential electrical appliances. Most of those motors are induction/DC/universal motors and their efficiency levels are very low. It is an urge to develop a motor with higher operating efficiency. With the recent development in the field of power electronics and magnet technologies, it would be possible to meet the above requirements...
Brushless direct current motor finds its applications in electric propulsion due to its reliability, reduced electromagnetic interference and improved life cycle cost. Rotor position sensing with sensorless techniques exhibit better performance with varying temperature and humidity conditions as well as continual motion of the vessels and also overthrow the use of hall sensors. A control technique...
This paper presents a novel topology of dual rotor radial flux-BLDC motor with Halbach array magnets as an efficient solution for drives. Energy efficient motors are the need of day for electric vehicles, industrial and consumer products. Especially this concept is arrived to cater for the requirements of electrical vehicle. Due to advent of high permeability, high saturation magnetic materials, high...
In this paper, a direct-drive spherical motor to produce two-degree of freedom rotations has been proposed. The structure and prototype of the motor are given and the basic principles are described, including the operation principle and mathematic theories, etc. Importantly, the two air gaps between the mover and the rotor, the mover and the stator that mainly determine the performance of the motor...
Due to the simple and robust structure, cost-effective SRM has attracted much attentions. For the applications to Electric vehicles (EVs), in-wheel motor whose configuration has an inner stator and outer rotor. The arrangement can eliminate transmission loss greatly. This paper mainly focuses on the torque characteristics analysis for the in-wheel SRM. Through torque performance comparison among three-phase...
This paper deals with the driver design for Brushless DC Motor (BLDCM) by quasi-sinusoidal voltage source inverter with voltage space vector pulse width modulation (VSVPWM) technology. Traditionally, BLDCM is driven by six-step inverter with digital Hall sensor feedback, and has the property of trapezoidal back EMF. However, this paper presents an approach to generate a quasi-sinusoidal voltage source...
In this paper we have designed a fuzzy logic controller for the speed control of bidirectional brushless DC motor (BLDC). The speed control is achieved by using fuzzy controller. The fuzzy logic control is used in three phase BLDC motor in order to control the four quadrants operations without any loss of power. In fact energy is conserved during the regenerative period and storage of excess energy...
Permanent magnet BLDC motor can be designed with different rotor configurations based on the arrangement of the permanent magnets. Rotor configurations strongly influence the performance of permanent magnet electrical machines. The aim of this paper is to compare and evaluate different rotor configurations for PMBLDC motor. Most of the applications prefer surface mounted permanent magnet design due...
Common mode voltage of the inverter output create a leakage current in the stator. It creates a net magnetic flux link with the shaft and induces an electromotive force (EMF) in between the two ends of the rotor. This EMF generates a current through two bearings and reduces its lifetime. In this study, we propose a frequency selective low impedance path to dissipate the EMF in the shaft. Finally,...
Odd stator slot-number permanent magnet brushless DC motor with asymmetrical-winding has the advantage of unique flux distribution in the stator slot. It could be explored to make sensorless control using flux linkage variation method for this kind of machine. This paper investigates the capability of the 9-slot 8-pole PM BLDC motor to be controlled sensorless from zero speed. The results show that...
This paper presents a modeling approach and a fault index analysis of a voltage-source brushless DC motor. First, an analytical multi-physical model of the inverter-fed Permanent Magnet DC motor is developed and simulated using Matlab/Simulink. This model enables the generation of electrical, magnetic and vibration signals under healthy and faulty motor behaviors, with several fault categories and...
Aim of this work is the development of a competitive alternate design topology (in terms of power density) of a small permanent magnet dc (PMDC) motor found in automotive applications. Initially, a real industrial motor is measured, designed and simulated, while its measurements and the relevant manufacturer data are considered as a benchmark. In turn, through custom developed software, a redesigned...
A noise immunity improvement for hybrid position observers for brushless dc motor drives is proposed. A finite state machine is used to detect Hall-effect sensor transitions to determine if these transitions are true transitions or the result of momentary glitches. This filter causes a delay in the detection of the Hall-effect sensors that is compensated in the proposed observer. The proposed observer...
This paper develops the brushless dc (BLDC) motor sensorless control system for an drilling dig system in shale gas development. The sensorless techniques that are based on a hysteresis comparator and inductance method with a high starting torque are suggested. Combined with the application of drilling rig system, analyzed the performance requirements of brushless DC motors (BLDCM) in the fields of...
Direct torque control for brushless DC motor is a kind of control strategy with fast dynamic response and small torque ripple. The key issue of torque calculation is the estimation of back EMF. For that this paper proposes an optimized back electromotive force (back-EMF) sliding mode observer (SMO), a continuous smooth arc-tangent function is introduced into the observer in order to weaken chattering...
A new structure for a rotary - linear Switched Reluctance Motor (RL-SRM) is presented in this paper. It has been mainly designed to engage and disengage a rotating gear. The motor is comprised of a three-phase 6/4 rotary SRM and a two-phase transverse flux linear SRM. The linear phases are placed at the sides of the rotary section to create forward-backward motion. The motor design is performed based...
This paper describes a new position and speed observer, for BLDCPM1 motor drive sensorless control, based on the line-to-line PM flux linkage estimation. Line-to-line PM flux linkage can be estimated based on measured phase currents and line to line voltage. The zero-crossing of the line-to-line PM flux linkage occurs right in the middle of two commutation points, which is used as a basis for the...
The paper presents a new method of controlling a brushless DC motor (BLDC), which allows to increase the starting torque. The BLDC motor is controlled in configuration C60Q+. This is the current control method, which allows for even load distribution on each the switching transistor of electronic commutator. The new method of BLDC motor controlling increases the starting torque basing on the information...
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