Loading in 5 sec....

The Magnetic Field of Synchronous Machines: Slides to Complement Class NotesPowerPoint Presentation

The Magnetic Field of Synchronous Machines: Slides to Complement Class Notes

- By
**rene** - Follow User

- 80 Views
- Uploaded on

Download Presentation
## PowerPoint Slideshow about ' The Magnetic Field of Synchronous Machines: Slides to Complement Class Notes' - rene

**An Image/Link below is provided (as is) to download presentation**
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

Presentation Transcript

### The Magnetic Field of Synchronous Machines: Slides to Complement Class Notes

by Constantine J. Hatziadoniu

Machine with Salient Poles winding

One phase with concentrated winding: windingFlux distribution is rectangular

One-phase distributed winding: Flux space distribution is closer to sinusoidal

Three phase stator: positive sequence currents closer to sinusoidal

Phase a is excited by a sinusoidal current: Air-gap field is a sinusoidal (space) distribution pulsating in time

Phase a field is a two-pole magnet; The magnetic axis passes through the middle (axis) of the winding

Phase b bi-polar field through the middle (axis) of the winding

Phase c bi-polar field through the middle (axis) of the winding

All three fields added in the air-gap: The resulting field is a rotating sinusoidal distribution

The combined field (dashed line) moving around the air gap is a rotating sinusoidal distribution

…Continued is a rotating sinusoidal distribution

Instances of the rotating field: Field rotates ones around the air-gap within a complete electric period

The winding arrangement of a four-pole machine the air-gap within a complete electric period

Phase a of the 4-pole machine: The spatial distribution varies twice in a full cycle

Phase b of the 4-pole machine varies twice in a full cycle

Phase c of the 4-pole machine varies twice in a full cycle

The three distributions shown for the 4-pole machine varies twice in a full cycle

Combined field is a rotating distribution varies twice in a full cycle

The 4-pole field rotates ½ times around in one electric period—the machine speed is reduced to half the speed of a 2-pole machine

The Rotor Field of the 4-pole machine period—the machine speed is reduced to half the speed of a 2-pole machine

Rotor and Stator Fields rotate in step inside the period—the machine speed is reduced to half the speed of a 2-pole machineairgap

Download Presentation

Connecting to Server..