Search results “Torque ripple in induction motor”

What is TORQUE RIPPLE? What does TORQUE RIPPLE mean? TORQUE RIPPLE meaning - TORQUE RIPPLE definition - TORQUE RIPPLE explanation.
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Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license.
Torque ripple is an effect seen in many electric motor designs, referring to a periodic increase or decrease in output torque as the motor shaft rotates. It is measured as the difference in maximum and minimum torque over one complete revolution, generally expressed as a percentage.
A common example is "cogging torque" due to slight asymmetries in the magnetic field generated by the motor windings, which causes variations in the reluctance depending on the rotor position. This effect can be reduced by careful selection of the winding layout of the motor, or through the use of realtime controls to the power delivery.

Views: 141
The Audiopedia

Pulse width Modulation for Power Electronic Converters by Dr. G. Narayanan,Department of Electrical Engineering,IISc Bangalore.For more details on NPTEL visit http://nptel.ac.in

Views: 4867
nptelhrd

Pulse width Modulation for Power Electronic Converters by Dr. G. Narayanan,Department of Electrical Engineering,IISc Bangalore.For more details on NPTEL visit http://nptel.ac.in

Views: 3296
nptelhrd

https://youtu.be/nCQLGCaZ8uY
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A squirrel cage Rotor main main main exhibit behaviour in starting for certain relationship between the number of pole the number of stator and rotor slots equal you are an integral multiple of rotor slots the variation of reluctance as a function of space will be quiet pronoused resulting in strong alignment force at the instant of starting. This force may create an alignment torque stronger than the accelerating torque. consequent failure of motor to start .this phenomena is known as cogging

Views: 8752
Himanshu Srivastava

More information at: http://modlabupenn.org/anticogging/
Low cost brushless direct current motors are becoming more prevalent, especially from the hobby remote control community. These motors often have the required high-torque density; however, they also have significant torque ripple. This video and accompanying paper presents a low cost method for anticogging, the compensation of cogging torque.

Views: 11345
Modlab UPenn

The torque on the rotor of an electrical machine can be systematically decomposed into source components, such as to the stator-iron-to-rotor-iron or stator-current-to-rotor-magnet components.
In this video we demonstrate the approach and show different force components acting on a rotating permanent magnet motor.

Views: 1426
TUT Electromagnetics

Generation of multilevel voltage profile for torque ripple reduction of a 15 phase pole phase modulated induction motor drive using two level inverter structure

Views: 426
UMESH B S Umesh

(*links to two accompanying files below *) This is the fifth video on induction motors. It introduces the speed-torque curve of the squirrel cage induction motor (SCIM) and shows how it can be derived by using a SimPowerSystems model. The concept of pull-out torque and starting torques are discussed. the data is compiled into an MS Excel sheet and the resultant curve plotted.
Link to the page that contains SimPowerSystems model and the Excel file:
http://eacademic.ju.edu.jo/l.sharif/Material/Forms/AllItems.aspx?RootFolder=%2fl%2esharif%2fMaterial%2fElectrical%20Machines%20for%20Mechatronics%2f05%20Induction%20Motors&FolderCTID=&View=%7bA0E71073%2d59AD%2d4A99%2dACC6%2d800786A5413C%7d

Views: 9983
Lutfi Al-Sharif The University of Jordan

This is PMG but can be AC motor
We supply eletricity to test for motor.
It is working with out other starting torque, no cogging torque and no torque ripple.
It is very high efficiency.

Views: 8479
진준철

Torque control of slip ring induction motor using Siemens S7 1200 PLC training kit

Views: 382
abdul majid khan

We are providing a Final year IEEE project solution & Implementation with in short time. If anyone need a Details Please Contact us Mail: [email protected] Phone: 09842339884, 09688177392 Watch this also: https://www.youtube.com/channel/UCDv0caOoT8VJjnrb4WC22aw
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Views: 4988
SD Pro Engineering Solutions Pvt Ltd

This is a Bedini/Cole type window motor before adding the coils. The rotor has 36 Neodymium magnets in a N-S-N-S-N-S 6 pole configeration. The block magnet is a ceramic two pole N-S. The interreaction between the two is called a Cogging effect. Works like large invisible gears.

Views: 65007
Glenn Pfortmiller

Having a quick look at cogging torque, measuring it and looking at it's effects at speed

Views: 451
SiieeFPV

Views: 519
imcmahon

What is COGGING TORQUE? What does COGGING TORQUE mean? COGGING TORQUE meaning - COGGING TORQUE definition - COGGING TORQUE explanation.
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Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license.
Cogging torque of electrical motors is the torque due to the interaction between the permanent magnets of the rotor and the stator slots of a Permanent Magnet (PM) machine. It is also known as detent or 'no-current' torque. This torque is position dependent and its periodicity per revolution depends on the number of magnetic poles and the number of teeth on the stator. Cogging torque is an undesirable component for the operation of such a motor. It is especially prominent at lower speeds, with the symptom of jerkiness. Cogging torque results in torque as well as speed ripple; however, at high speed the motor moment of inertia filters out the effect of cogging torque.
A summary of techniques used for reducing cogging torque:
1. Skewing stator stack or magnets.
2. Using fractional slots per pole.
3. Modulating drive current waveform.
4. Optimizing the magnet pole arc or width.
Almost all the techniques used against to cogging torque also reduce the motor counter-electromotive force and so reduce the resultant running torque.
A slotless and coreless permanent magnet motors does not have any cogging torque.
Model railway motors usually have a 2-pole permanent magnet and 3, 5 or 7 poles on the armature to reduce cogging torque.

Views: 252
The Audiopedia

Cogging torque ripple minimization, also known as anticogging, is a software approach to making motors smoother. This video was presented at RSS 2014. More information can be found at http://modlabupenn.org/anticogging/.

Views: 3362
Modlab UPenn

Minimizing cogging torque in a skewed stator BLDC Motor
Cogging torque is a result of the interaction between the rotor magnets and stator slotting. This unwanted component of the torque introduces ripple in the output torque, poses higher stress on the machine bearing and produces vibration. There are few methods that are used to achieve cogging torque reduction. They usually compromise motor performance in some way, leading very often to reduced winding EMF.

Views: 1736
EMWorksInc

We are providing a Final year IEEE project solution & Implementation with in short time. If anyone need a Details Please Contact us Mail: [email protected] Phone: 09842339884, 09688177392 Watch this also: https://www.youtube.com/channel/UCDv0caOoT8VJjnrb4WC22aw
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dynamic response||Block schematic of DTC based speed control of BLOC motor Drive

Views: 2112
SD Pro Engineering Solutions Pvt Ltd

Until now, it is custom to discuss each electrical machine separately as if it had a unique existence. This presentation demonstrates that machines have many common features and introduces torque production in dc, synchronous and induction machines as interaction of two magneto-motive forces.

Views: 8854
Professor Essam Hamdi

Implement and automatically tune a field-oriented control system that controls the flux and torque of a three-phase induction motor.
Learn more about Field-Oriented Control: http://bit.ly/2BiB8Q5
Learn more about Motor Control Design: http://bit.ly/2BeNc4U
The control system consists of four PI controllers. The rotor speed and flux controllers in the outer loop provide references to the current controllers in the inner loop using the measured rotor speed and three-phase stator current as well as the Clarke and Park transformations. The four PI controllers are tuned using the Closed-Loop PID Autotuner block in a single simulation. This block injects an excitation signal during closed-loop plant operation to estimate the plant frequency response and automatically tune the PID gains. Based on the PID outputs, a PWM Generator module is used to generate the gate control pulses for the semiconductor switches in the machine-side power inverter, such that the desired flux and torque specifications are met. The Closed-Loop PID Autotuner block is part of Simulink Control Design™ since MATLAB® R2018a and the induction motor and power converters have been modeled in Simscape Power Systems™.
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See www.mathworks.com/trademarks for a list of additional trademarks. Other product or brand names maybe trademarks or registered trademarks of their respective holders.

Views: 1068
MATLAB

This animation is about torque production. It shows the principle of torque production in induction motor.
This animation is a part of "eBook: Principles of Electrical Machinery", developed by Deshya technologies Pvt Ltd.
For more details, please visit: www.deshya.co.in

Views: 4055
deshya

A slottles motor design will have new zero torque ripple. i.e. no variation in torque over electrical cycle position. I was able to tune to an incredible +/-1 count following error at speed. Wow! Besides an increase in torque density this Infranor XtraFors Prime motor can hit incredibly high speed of up to 30krpm without filing the magnets off. I also found that they use Quantum Devices encoders that offer 1250 line SIN COS with our 4096 *4 interpolation that's 20,480,000 counts/rev... great for tracking space objects.

Views: 238
Dean Crumlish

Views: 1731
prosimrnd

Direct torque control (DTC) is one of the most excellent control strategies of torque control in induction motor. The aim is to control effectively the torque and flux. Torque control of an induction motor (IM) based on DTC strategy will be developed and a comprehensive study will be made in this project. Direct torque control is the first technology to control the real motor control variables of torque and flux. This method makes the rotor more accurate and fast control, high dynamic speed response and simple to control. The reference value can be calculated using the flux and torque estimation and also motor parameters.With the Joint progress of the power electronics and numerical electronics it is possible today to deal with the axis control with variable speed in low power applications. With these technological projections, various command approaches have been developed by the scientific community to master in real time, the flux and the torque of the electrical machines, the direct torque control (DTC) scheme being one of the most recent steps in this direction. This scheme provides excellent properties of regulation without rotational speed feedback. In this control scheme the electromagnetic torque and stator flux magnitude are estimated with only stator voltages and currents and this estimation does not depend on motor parameters except for the stator resistance.

Views: 14244
Vinod Kumar

new experiments https://www.youtube.com/playlist?list=PLGAApvX09JYpDTTxzb9WJnsZ6pIKEoGI9
this video shows the open loop control of BLDC, (sensors was not used)
DDS was used to generate rotation of "virtual" rotor, then this angle with constant power was used in inverse Park transformation, after that SVPWM was used to generate stator currents.
two different constant power was applied, 20% at begging, and 100% at 0:20
with 20% of power cogging-torque was visible, with 100% it is not visible, but the motor is heated
BLDC cogging torque is the pulsating torque component produced by the variation of the air-gap permeance or reluctance of the stator teeth and slots above the magnets as the rotor rotates.
No stator excitation is involved in cogging torque production.
More info about this construction in description for this video https://www.youtube.com/watch?v=HtvWJJolB9s&list=PLGAApvX09JYpDTTxzb9WJnsZ6pIKEoGI9&index=8
New successful results with cogging compensation on this video (and newer) https://www.youtube.com/watch?v=hLeS3XZbM8A&index=3&list=PLGAApvX09JYpDTTxzb9WJnsZ6pIKEoGI9

Views: 6599
linvinus

With a Novel Non-inductive Boost Front End

Views: 26
GPRS Online Projects

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If you find this channel useful, please support the channel by sending money back to my paypal account [email protected]
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Views: 2351
vn Journal

In this project, a comparative study between adaptive fuzzy PI direct torque control and fuzzy GA. A novel direct torque control strategy, using genetic algorithm on-line to optimize the fuzzy PI controller, is proposed. In this approach, according to speed error and its first-time derivative, the proportional coefficient Kp and integral coefficient Ki can be on-line adjusted by fuzzy adaptive PI speed regulation, and the fuzzy logic adapter parameters are optimized by genetic algorithm to improve the self-adaptation of speed. Moreover, the second fuzzy logic controller is applied to select the voltage vector instead of the conventional hysteresis controllers. Fuzzy PI direct torque control and proposed approach show that not only the speed response, overshoot and speed steady precision have been improved, but also the torque, flux, and stator current ripples have been effectively decreased at low speed, and the robustness of the whole system has been enhanced.
Reference Paper: Research on Direct Torque Control of Induction Motor Based on Genetic Algorithm and Fuzzy Adaptive PI Controller
Author’s Name: Hao Li, Qiuyun Mo, and Zhilin Zhao
Source: International Conference on Measuring Technology and Mechatronics Automation
Year:2010

Views: 70
VERILOG COURSE TEAM-ELECTRICAL PROJECTS

Dear everybody!
If you find this channel useful, please support the channel by sending money back to my paypal account [email protected]
Thank you very much.

Views: 3818
vn Journal

Dear everybody!
If you find this channel useful, please support the channel by sending money back to my paypal account [email protected]
Thank you very much.

Views: 2846
vn Journal

Induction Motors Summary Lecture , Slip , Equivalent Circuit , Torque , Speed , Power Equations
Problems and Numericals Based on above theory
https://youtu.be/HymGRPNQJfQ

Views: 77
Vishnu Pillai

Views: 2223
vn Journal

stepper motor torque ripple sympathetic to the 3.3Hz mount frequency

Views: 710
astrolopitec

I discovered something simple: the magnetic center with permanent magnets is off ! This is one of the reasons my mendocino starts cogging at a certain frequency.
I don't know this for other than cylindrical magnets but it can explain my problem with the mendocino.
maybe someone knows more about this? please let me know.

Views: 7101
sMartcreations2010

EMPATHY is an innovative configuration of permanent magnet electrical motor, based on the evolution of the FSPM (Flux Switching Permanent Magnet) architecture, enabling to limit torque ripple which traditionally affects such a configuration, being also characterized by high efficiency and high power and torque value.

Views: 6934
LaborSrl

Harmonics and Torque Ripple Minimization using L-C Filter for Brushless DC Motors

Views: 1976
VERILOG COURSE TEAM

Just for exams purpose,
:)
Thanks for watching,

Views: 515
suriya roopam

This is the second part of my induction motors lecture.

Views: 760
Frank Ferrese

Commutation Torque Ripple Reduction Strategy of ZSource Inverter Fed Brushless DC Motor
Based on the Z-source inverter, this paper proposes a novel commutation torque ripple reduction strategy for brushless DC motor (BLDCM). The proposed strategy employs the same modulation mode in both the normal conduction period and the commutation period, and the commutation torque ripple is reduced by regulating the shoot-through vector and active vector duty cycles. The proposed detection method acquires the end point of commutation by comparing the clamped terminal voltages with reference zero level, and the signal-noise-ratio of the detection is improved by avoiding the attenuation of the terminal voltages. Furthermore, a certain pulse width of the shoot-through vector can not only reduce the commutation torque ripple but also provide a new opportunity to detect the end point of commutation. Moreover, Z-source inverter provides the buck-boost ability for BLDCM drive system, then the dc voltage utilization can be improved, and the safety of the drive system can also be improved. In addition, this paper analyzes the terminal voltages during each vector. The experimental results verify the correctness of the theories and the effectiveness of the proposed approach.
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LeMeniz Infotech

This video tutorial explains how the back emf induces in the armature coil of the dc motor. In addition to this, you can find their advantages. Here, you will also come to know how back emf makes motor self-regulating.
You can further study this topic, on our official website:
https://circuitglobe.com/what-is-back-emf-in-dc-motor.html

Views: 21938
Circuit Globe

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Pool Accessary Options. Types of Pool Water Sanitation. There are a variety of pool water treatment options beyond the traditional chlorine, although it remains the most popular option. Chlorine is added to a pool to combat algae or other bacteria that can gather in the water. Chlorinated water relies on a proper pH balance to prevent an overly chemical-smelling pool. While saline pools, also known as saltwater pools, are not chlorine-free, they consist of a salt-chlorine generator that produces lower levels of chlorine. Mineral water pools are chlorine-free and use disinfecting minerals to prevent bacteria and algae. Pool Maintenance.