Chapter 6 Sensorless Control for BLDC Motor Drives

Slides:

Advertisements

Similar presentations

9.11. FLUX OBSERVERS FOR DIRECT VECTOR CONTROL WITH MOTION SENSORS

Advertisements

MSP430 Motor Controller Applications

Power System Fundamentals

DIGITAL CONTROL STRATEGY FOR FOUR QUADRANT OPERATION OF THREE PHASE BLDC MOTOR WITH LOAD VARIATIONS C. Sheeba Joice, S. R. Paranjothi,and V.Jaeahar Seenthil.

ELECTRIC DRIVES Ion Boldea S.A.Nasar 1998 Electric Drives.

ECE Electric Drives Topic 17: Wound-Field Synchronous

BRUSHLESS D.C MOTORS Prepared by… FAKHRI KHALIFEH.

ECE Electric Drives Topic 12: Scalar Control of AC Induction

Single-phase Motor Stator

Why Switched Reluctance Motors?. Let’s Focus on 3 Motor Types AC Induction Brushless DC Switched Reluctance.

Hybrid Position Sensorless Control of a RSM in the rated speed range Francois Barnard Stellenbosch University Energy Postgraduate Conference 2013.

14-1 Copyright © 2003 by John Wiley & Sons, Inc. Chapter 14 Induction Motor Drives Chapter 14 Induction Motor Drives Extremely large potential as adjustable.

June 9, s Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science 6.11s Design of Motors, Generators.

A Position Detection Strategy for Sensorless Surface Mounted Permanent Magnet Motors at Low Speed Using Transient Finite-Element Analysis Zhao Wang, Shuangxia.

Student: Dueh-Ching Lin Adviser: Ming-Shyan Wang Date : 20th-Dec-2009

Department of Electrical Engineering Southern Taiwan University

Sensorless Control of the BLDC Motors From Near-Zero to High Speeds

1 An FPGA-Based Novel Digital PWM Control Scheme for BLDC Motor Drives 學生 : 林哲偉學號 :M 指導教授 : 龔應時 IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL.

Department of Electrical Engineering, Southern Taiwan University 1 A novel sensorless control method for brushless DC motor Student: Wei-Ting Yeh Adviser:

Performance investigation of modified hysteresis current controller with the permanent magnet synchronous motor drive A.N. Tiwari1 P. Agarwal2 S.P. Srivastava2;

A New Cost Effective Sensorless Commutation Method for Brushless DC Motors Without Phase Shift Circuit and Neutral Voltage 南台科大電機系 Adviser : Ying-Shieh.

Department of Electrical Engineering Southern Taiwan University of Science and Technology Robot and Servo Drive Lab. 2015/11/20 Simple position sensorless.

Adviser : Cheng-Tsung Lin Student :Nan-hui Hsieh

Student: Hsin-Feng Tu Professor: Ming-Shyan Wang Date : Dec,29,2010

IEEE TRANSACTIONS ON MAGNETICS, VOL. 42, NO. 10, OCTOBER Optimal Commutation of a BLDC Motor by Utilizing the Symmetric Terminal Voltage G. H. Jang.

Electric motors KON-C2004 Mechatronics Basics Tapio Lantela, Nov 2nd, 2015.

ELECTRIC DRIVES INTRODUCTION TO ELECTRIC DRIVES. Electrical Drives Drives are systems employed for motion control Require prime movers Drives that employ.

Student: yi-sin Tang Adviser: Ming-Shyan Wang Date :

Study on maximum torque generation for sensorless controlled brushless DC motor with trapezoidal back EMF 指導教授：王明賢學生：楊政達南台科大電機系.

Department of Electrical Engineering Southern Taiwan University Simple position sensorless starting method for brushless DC motor Student: Po-Jui Hsiao.

Investigation on the Bipolar-Starting and Unipolar-Running Method to Drive a Brushless DC Motor at High Speed with Large Starting Torque PREM, Department.

Department of Electrical Engineering, Southern Taiwan University Initial Rotor Position Estimation for Sensorless Brushless DC Drives Student: G-E Lin.

Special-Purpose Electric Machines The machines introduced in this lecture are used in many applications requiring fractional horsepower, or the ability.

AC Machines. BOOSTER Basic Function:- -Sometimes when we use electrical power we need different voltage level to main supply. It is provided by Booster.

CLOSED LOOP SPEED CONTROL OF DC MOTOR WITH PWM TECHNIQUE

CNC FEED DRIVES Akhil Krishnan G M.Tech 1. CONTENTS 1.Introduction 2.Requirements of CNC feed drives 3.Servo motor 3.1 Servo drive control 3.2 Components.

CNC FEED DRIVES.

SINGLE-PHASE INDUCTION MOTOR

MULTIPHASE BRUSHLESS DC MOTOR

CONTINUOUS-DRIVE ACTUATORS**

Rectifiers, Inverters & Motor Drives

Speed control of three phase induction motor

BRUSHLESS MOTOR COMMUTATION

ELECTRONIC & TELECOMMUNICATION DEPARTMENT.

BRUSHLESS DIRECT CURRENT MOTOR

Study on maximum torque generation for sensorless controlled brushless DC motor with trapezoidal back EMF.

AC and DC motors.

Improved Speed Estimation in Sensorless PM Brushless AC Drives

A new Magnetic Field Modulation Type of Brushless Double-Fed machine

Chapter 3 Simulation for BLDC Motor Drives

FPGA DESIGN APPROACH OF DIGITAL CONTROL OF THREE-PHASE INDUCTION MOTOR

Brushless DC (BLDC) Motors

Synchronous Motors and Generators

APPLICATIONS Reference: Textbook-Chapter 6,8 & 9 'Power Electronics',C

Special-Purpose Electric Machines

Electric braking Powerpoint presentation by:- Poonam sharma

Equivalent Circuit of a Single Phase Induction Motor

Why is starter necessary for a three-phase induction motor?

Mathematical Model and Characteristics Analysis of the BLDC motor

CMPUT 399 Intro Robotics & Mechatronics: Motor Control

Control of Chaos in Electric Drive Systems

UNIT-5 SPECIAL MACHINE DRIVES SWITCHED RELUTANCE MOTOR DRIVE

Objective: The main aim of this project is to control the speed of the brush less direct current motor based on the single current sensor is proposed.

EEM476 Power Electronics II

CHAPTER – 46 ELECTRONIC CONTROL OF A.C. MOTORS

Summary of Material on Electric Drives Covered on July 24, 2019

Dynamical Operation, Vector Control, DTC and Encoder-less Operation

Electric Machine Design Course

Braking of Three Phase IM

Electric Machine Design Course

Presentation transcript:

Chapter 6 Sensorless Control for BLDC Motor Drives Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd.

Increase the volume of the system Why? Increase the volume of the system Disadvantages of position sensors Easy to be interfered Low reliability High precision demand for installation High reliability Sensorless control Strong anti-disturbance capability Low torque ripple Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd. 2

Indirect detecting methods for the rotor Back EMF-based method Flux linkage-based method Inductance-based method Artificial-intelligence-based method Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd.

Principle Back EMF-based method Commutation with 30°electrical angle’s delay of zero crossing point of back EMF. Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd.

Back EMF signal at low speed High speed Low speed Difficult to detect directly, weak signal at low speed, not easy to delay 30°. Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd. 5

Terminal Voltage Sensing Method Back EMF-based method Terminal Voltage Sensing Method Back EMF Integration Method Third Harmonic Back EMF Method Freewheeling Diode Method Line Back EMF Method Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd.

1. Terminal Voltage Sensing Method When phase A and B are conducted and phase C is inactive, there exists Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd.

1. Terminal Voltage Sensing Method When phase A and B are conducted and phase C is inactive, there exists Phase C inactive Phase B inactive Phase A inactive Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd.

Signal is easy to obtain but difficult to delay. 1. Terminal Voltage Sensing Method Waveform of terminal voltage of phase A Zero crossing point detector Signal is easy to obtain but difficult to delay. Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd.

2. Back EMF Integration Method Advantages: No need for rotor speed information during the control process; lagging or leading commutation of the motors could be done by regulating the threshold; insensitive to the switch signal. Disadvantages: Integration accumulated errors and threshold setup problems. Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd.

3. Third Harmonic Back EMF Method Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd.

3. Third Harmonic Back EMF Method Wider range of speed, smaller delay of the phase. However, due to the continuous accumulation of noise signal at low speed, errors will be produced during the integration process, causing inaccurate commutation Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd.

Condition for D2 conducting Phase A and B conducted, phase C inactive 4. Freewheeling Diode Method Condition for D2 conducting Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd.

4. Freewheeling Diode Method Detection circuit High sensibility. Detection circuit is complicated due to the requirement of six independent sources. Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd.

5. Line Back EMF Method No need to use the previous commutation instants, wider speed range of applications; Complicated calculation of line back EMF Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd.

Flux linkage-based method Large integral calculation; Accumulative error will be produced at low speed; Easily affected by the motor parameters. Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd.

Inductance-based method Due to the saturation effect of stator core, the flux will change while injecting current pulses in different directions, leading to different inductance. Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd.

Inductance-based method Well suitable for the rotor initial position detection at stand still; Relies on high-precision current sensing due to the small difference between the inductances with different rotor positions. Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd.

Starting process for sensorless control Determination of initial rotor position at standstill Inductance method Rotor locating method Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd.

Three-step starting method Starting methods for sensorless control Easily influenced by factors such as load torque, applied voltage, acceleration curve, moment of inertia, etc. Three-step starting method Permanent Magnet Brushless DC Motor Drives and Controls, First Edition. Chang-liang Xia. © 2012 Science Press. Published 2012 by John Wiley & Sons Singapore Pte. Ltd.