Mesh connected electrical rotating machine with span changing
AssigneeBorealis Technical Limited
InventorJonathan Sidney Edelson
Life of this patent
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Abstract
An electrical rotating apparatus is provided that has variable impedance. This is achieved by connecting one of the polyphase components of the apparatus in a mesh connection. The spanning value, L, of such a mesh connection may be varied by changing the harmonic content supplied by an inverter component. Also provided is a method for connecting an inverter to a motor, wherein a switching arrangement permits the simple alteration between various mesh connections of different span value, changing thereby the Volts/Hertz ratio of the motor.
Claims7
A method for operating a polyphase electrical machine having N phases, where N is an integer, comprising,
- a) electrically connecting a first polyphase circuit element comprising N single-phase two terminal sub-elements into a mesh connection characterized in that a first terminal of each sub-element is individually and directly connected to a second terminal of a different sub-element according to a spanning value L, which represents the number of phases between the first and second terminal of each single phase winding;
- and
- b) electrically connecting a second polyphase circuit element having N phases and N outputs characterized in that the N outputs of the second polyphase circuit element are connected to the N first terminals of the first polyphase circuit element;
- and
- c) supplying electrical current from the second polyphase circuit element to the first polyphase circuit element.
Dependencies are inferred from the claim text.