By Greg C. Stone
A unmarried accomplished source for the layout, software, trying out, and upkeep of rotating machines
Filling a long-standing hole within the box, Electrical Insulation for Rotating Machines covers, in a single worthy quantity, all elements of the layout, deterioration, trying out, and service of insulation utilized in automobiles and turbines. Lucidly written by way of top specialists, this authoritative reference presents either ancient history very important to realizing laptop insulation layout and the main up to date details on new machines and the way to pick insulation structures for them.
assurance contains such key issues as:
- kinds of rotating machines, windings, and rotor and stator winding development
- comparing insulation fabrics and structures
- Stator winding and rotor winding insulation structures in present use
- Failure mechanisms and service
- trying out and tracking
- upkeep ideas
Detailing over 30 various rotor and stator winding failure strategies and reviewing virtually 25 diversified checks and displays used to evaluate winding insulation situation, Electrical Insulation for Rotating Machines may also help computer clients stay away from pointless computing device mess ups, lessen upkeep bills, and encourage larger self belief within the layout of destiny machines.Content:
Chapter 1 Rotating computing device Insulation platforms (pages 1–41):
Chapter 2 comparing Insulation fabrics and structures (pages 43–71):
Chapter three ancient improvement of Insulation fabrics and platforms (pages 73–94):
Chapter four Stator Winding Insulation platforms in present Use (pages 95–111):
Chapter five Rotor Winding Insulation structures (pages 113–118):
Chapter 6 middle Laminations and Their Insulation (pages 119–127):
Chapter 7 common ideas of Winding Failure, fix, and Rewinding (pages 129–136):
Chapter eight Stator Failure Mechanisms and service (pages 137–180):
Chapter nine Rotor Winding Failure Mechanisms and service (pages 181–209):
Chapter 10 center Lamination Insulation Failure and service (pages 211–225):
Chapter eleven common ideas of trying out and tracking (pages 227–233):
Chapter 12 Off?Line Rotor and Stator Winding exams (pages 235–283):
Chapter thirteen In?Service tracking of Stator and Rotor Windings (pages 285–320):
Chapter 14 center checking out (pages 321–332):
Chapter 15 popularity and location trying out of recent Windings (pages 333–350):
Chapter sixteen upkeep options (pages 351–364):
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A unmarried finished source for the layout, software, checking out, and upkeep of rotating machines Filling a long-standing hole within the box, electric Insulation for Rotating Machines covers, in a single important quantity, all features of the layout, deterioration, checking out, and service of insulation utilized in cars and turbines.
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Extra info for Electrical Insulation for Rotating Machines: Design, Evaluation, Aging, Testing, and Repair
For form-wound machines (and now even some critical random-wound stators), a process called global vacuum pressure impregnation (VPI) is used. The latter uses epoxy or polyester as the glue. These processes are described in detail in Chapters 3 and 4. The result is coils or bars that do not move in the slot. 7 Mechanical Support in the End-Winding The principle purpose of the end-winding is to allow safe electrical connections between coils/bars that are in series and to make safe connections to other parallels.
Slot Semiconductive Coating. The reason PD may occur between the coil and the core is similar to the reason PD can occur in air pockets within the groundwall. Since coils and bars are fabricated outside of the stator core, they must be thinner in the narrow dimension than the width of the core’s steel slots, otherwise, the coils/bars cannot be inserted into the slot. 14a shows the gap that can occur in the slot, adjacent to the coil surface, since the coil is undersized. 14b. As for the groundwall voids, a significant percentage of the copper voltage will appear across the air gap.
Before about 1970, the strand and the turn insulation were separate components in multiturn coils. 12. Photo of the cross section of a coil where the turn insulation and the strand insulation are the same. sulation. 12 shows the strand insulation is upgraded (usually with more thickness) to serve as both the strand and the turn insulation. , the turn taping process) and increases the fraction of the slot cross section that can be filled with copper. 11]. Both form-wound coils and random-wound stators are also exposed to mechanical and thermal stresses.