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Forum Index : Electronics : Star Delta Controller
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| dwyer Guru  Joined: 19/09/2005 Location: AustraliaPosts: 574 |
Star Delta Controller The Star Delta Controller has been designed for windmill and hydro alternator applications. What it does: It allows an alternator with a three phase winding to be switched from star configuration to delta. The design is not limited to a star or delta configuration. The relays turn on or off, at the selected rpm and it is the users choice what application should be performed at that point. In any case, it does allow optimum power to be extracted from the alternator. The relays in the photo are standard automobile relays. The board is quite small, less than 4 sq. in. The user has the ability to control at what rpm ( windmill blade speed) the switch takes place and the duration the windmill must maintain a specific rpm before that change takes place. This is done with a 10 pin 5 switch DIP that is located on the main control board. This give 32 rpm selectable options from 25 to 800 rpm in 25 rpm steps.(picture and schematic below are NOT the new Star/Delta. We will update photos.) The control board is small and can be built into the alternator itself if the alternator does not get excessively hot or in close proximity to it. The main chip is a programmed AVR and greatly simplifies the circuit. This chip is relatively trouble free. It is U1 on the schematic. The picture shows three relays used to control an alternator, However, they are not required if only one change is required at the desired rpms.   <>The relay portion of the controller is separate from the main board. This allows many different relay types to be used and other options such as SCR circuits to be developed. The alternator section is in dotted lines. This is only an example and actual layout may be different.Relays are standard automotive relay |
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5078 |
Thats a neat little circuit. Easy to set up. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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windstuffnow Newbie  Joined: 30/06/2006 Location: United StatesPosts: 31 |
I've used one from Design Specialists. They work great ! Gives a not so powerful alternator a turbo. Nice unit! Windstuff Ed |
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