Starting Resistors
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1/17/2011
STARTING RESISTORS
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Back THE DRUM-WOUND ARMATURE
Up Next Neets Module 05-Introduction to Generators and ANSWERS TO QUESTIONS Q1. THROUGH Q16Motors Cont.
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Shunt resistors Empro Manufactures Shunt Resistors. Design-Repair-Calibration Services. EmproShunts.Biz/Shunt+resistors stator winding machines A leading manufacturer for coil winding machine in Taiwan www.shiningsun.com.tw Brushless Motors Torque, servo, BLDC, 10 - 800mm Contact us for custom motor needs www.alliedmotion.com
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1/17/2011
STARTING RESISTORS
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ARMATURE REACTION is the distortion of the main field in a motor by the armature field. This
causes the neutral plane to be shifted in the direction opposite to that of armature rotation. Interpoles and compensating windings are used to reduce the effect of armature reaction on motor operation.
STARTING RESISTORS are necessary since the dc resistance of a motor armature is very low.
Excessive current will flow when dc voltage is first applied unless current is limited in some way. Adding resistance in series with the armature windings reduces initial current. It may then be removed after counter emf has been built up. ANSWERS TO QUESTIONS Q1. THROUGH Q16. A1. A2. A3. A4. A5. A6. A7. A8. Direction of armature current, and direction of magnetic flux in field. Direction of conductor movement (rotation), direction of flux, and the direction of current flow. There are no differences. Generator action. Speed. The device to be driven by the motor. It must have a load connected to avoid damage from excess speed. High torque (turning force) at low speed.
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tpub.com/content/neets/14177/css/14177_61.htm
1/17/2011
STARTING RESISTORS
A9.
It maintains a constant speed under varying loads.
A10. Only outside of coils cut flux (inefficient). A11. By winding the armature in a way that places the entire coil where it is exposed to maximum flux. A12. By reversing either field or armature connections.
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stator winding machines www.shiningsun.com.tw A leading manufacturer for coil winding machine in Taiwan Wire & Cable Solutions www.yessjet.com Coiler / Winder / Spooler /Wrapper Extruder / Pay OFF / Take up Coil Winding-Geo. Stevens www.geostevens.com Manufacturer of Transformer and Coil Winding Machines and Equipment
www.Galilmc.com Motor Control Tutorials Free Web Tutorials from Galil, The World Leader in Motor Control.
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STARTING RESISTORS
Click Here to Order this information in Print Click here to make tpub.com your Home Page
Click Here to Order this information on CD-ROM Page Title: STARTING RESISTORS Back | Up | Next
Click Here to Download this information in PDF Format Click here for a printable version
Back THE DRUM-WOUND ARMATURE
Up Next Neets Module 05-Introduction to Generators and ANSWERS TO QUESTIONS Q1. THROUGH Q16Motors Cont.
Search Web www.tpub.com
Shunt resistors Empro Manufactures Shunt Resistors. Design-Repair-Calibration Services. EmproShunts.Biz/Shunt+resistors stator winding machines A leading manufacturer for coil winding machine in Taiwan www.shiningsun.com.tw Brushless Motors Torque, servo, BLDC, 10 - 800mm Contact us for custom motor needs www.alliedmotion.com
tpub.com/content/neets/14177/css/14177_61.htm
1/3
1/17/2011
STARTING RESISTORS
Home Information Categories Administration Advancement Aerographer Automotive Aviation Combat Construction Diving Draftsman ....Engineering Electronics Food and Cooking Math Medical Music Nuclear Fundamentals Photography Religion USMC Products Educational CD-ROM's Printed Manuals Downloadable Books
ARMATURE REACTION is the distortion of the main field in a motor by the armature field. This
causes the neutral plane to be shifted in the direction opposite to that of armature rotation. Interpoles and compensating windings are used to reduce the effect of armature reaction on motor operation.
STARTING RESISTORS are necessary since the dc resistance of a motor armature is very low.
Excessive current will flow when dc voltage is first applied unless current is limited in some way. Adding resistance in series with the armature windings reduces initial current. It may then be removed after counter emf has been built up. ANSWERS TO QUESTIONS Q1. THROUGH Q16. A1. A2. A3. A4. A5. A6. A7. A8. Direction of armature current, and direction of magnetic flux in field. Direction of conductor movement (rotation), direction of flux, and the direction of current flow. There are no differences. Generator action. Speed. The device to be driven by the motor. It must have a load connected to avoid damage from excess speed. High torque (turning force) at low speed.
2/3
tpub.com/content/neets/14177/css/14177_61.htm
1/17/2011
STARTING RESISTORS
A9.
It maintains a constant speed under varying loads.
A10. Only outside of coils cut flux (inefficient). A11. By winding the armature in a way that places the entire coil where it is exposed to maximum flux. A12. By reversing either field or armature connections.
2-15
stator winding machines www.shiningsun.com.tw A leading manufacturer for coil winding machine in Taiwan Wire & Cable Solutions www.yessjet.com Coiler / Winder / Spooler /Wrapper Extruder / Pay OFF / Take up Coil Winding-Geo. Stevens www.geostevens.com Manufacturer of Transformer and Coil Winding Machines and Equipment
www.Galilmc.com Motor Control Tutorials Free Web Tutorials from Galil, The World Leader in Motor Control.
Privacy Statement - Press Release - Copyright Information. - Contact Us - Support Integrated Publishing
tpub.com/content/neets/14177/css/14177_61.htm
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