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.
Claims12
An electrical rotating apparatus comprising:
- a) a first polyphase circuit element having N phases and N outputs;
- b) a second polyphase circuit element having N single phase sub-elements, each sub-element having an odd-numbered and an even numbered terminal, and wherein each odd-numbered terminal is connected electrically to one of the N outputs in a first sequence, wherein the first sequence is in order of phase angle;
- c) a N-pole, N-way switch wherein the N-poles are electrically connected to said N power output phases in a first sequence, and the N-ways are electrically connected to each even-numbered terminal so that said second polyphase circuit element is mesh connected, and wherein said switch shifts said phase angle order according to a spanning value, L, of the mesh connection.
A drive system for driving the N single phase sub-elements of a first polyphase circuit element each sub-element having an odd-numbered and an even numbered terminal comprising:
- a) a second polyphase circuit element having N phases and N outputs;
- b) a terminal block having 2N terminals comprising a first set of N terminals for connection to each odd-numbered terminal and a second set of N terminals for connection to each even-numbered terminal, in which the first set of N terminals is electrically connected to said N outputs;
- c) a N-pole, N-way switch wherein the N-poles are electrically connected to said N outputs in phase angle order, and the N-ways are electrically connected to said second set of N terminals, and wherein said switch shifts said phase angle order so that a spanning number, L, may be varied.
A mesh-connected electrical rotating apparatus having a variable spanning number, L, comprising:
- a) a terminal block having N terminals for connection to a first polyphase drive system having N phases and N outputs;
- b) a second polyphase circuit element having N single phase sub-elements, each sub-element having an odd-numbered and an even numbered terminal, in which said odd-numbered terminals are electrically connected to said N terminals;
- c) a N-pole, N-way switch wherein the N-poles are electrically connected to said N terminals, and the N-ways are electrically connected to said even-numbered terminals, and wherein said switch shifts said phase angle order so that said second polyphase circuit element is mesh connected and a spanning number, L, may be varied.
Dependencies are inferred from the claim text.