Motor drive circuit
AssigneeGeneral Electronics Applications, Inc.
InventorJoseph Pernyeszi
Life of this patent
Estimating the term…
Abstract
A phase converter for converting single-phase power to three-phase power, wherein the single-phase power is provided at a first and a second single-phase power terminal and the three-phase power is provided to a first, a second and a third three-phase power terminal, the phase converter comprising: a first power transfer means for coupling the first single-phase power terminal to the first three-phase power terminal; a second power transfer means for coupling the second single-phase power terminal to the second three-phase power terminal; and an inverter coupled to receive power from the first and second single-phase power terminals. The inverter provides power to the third three-phase power terminal and a neutral output by phase shifting its input power by ninety degrees.
Claims7
A solid-state phase converter for converting single-phase power to three-phase power, wherein the single-phase power is provided at a first and a second single-phase power terminal and the three-phase power is provided to a first, a second and a third three-phase power terminal, the solid-state phase converter comprising:
- a first power transfer means for coupling the first single-phase power terminal to the first three-phase power terminal;
- a second power transfer means for coupling the second single-phase power terminal to the second three-phase power terminal;
- and
- a solid-state inverter coupled to receive power from the first and second single-phase power terminals, the inverter including a first output terminal for coupling to the third three-phase power terminal and a second output terminal for coupling to a neutral output, wherein the neutral output is a center point between the first and second three-phase power terminals and wherein the power output from the first and second output terminals is shifted by ninety degrees from an input phase.
A method of converting single phase power to three phase power to drive a motor having a first, a second and a third winding coupled together in a delta configuration, and wherein the first winding has a center tap and the second and third windings are connected to each other at a connection terminal, the method comprising steps of:
- coupling the single phase power to the first winding;
- coupling the single phase power to an input of a solid-state phase inverter, wherein the solid-state phase inverter has an phase inverter output that is phase shifted from the input;
- and
- coupling the solid-state phase inverter output to the center tap and the connection terminal.
A solid-state phase converter for converting single-phase power to three-phase power, wherein the single-phase power is provided at a first, a second and a third single-phase power terminal and the three-phase power is provided to a first, a second and a third three-phase power terminal, the solid-state phase converter comprising:
- a first power transfer means for coupling the first single-phase power terminal to the first three-phase power terminal;
- a second power transfer means for coupling the second single-phase power terminal to the second three-phase power terminal;
- and
- a solid-state inverter coupled to receive power from the first, second and third single-phase power terminals, the solid-state inverter including a first output terminal for coupling to the third three-phase power terminal, and wherein the power output from the output terminals is shifted by ninety degrees from an input phase.
A method of converting single phase power provided at a first, second and third single phase power terminals to three phase power to drive a motor having a first, second and third motor terminals, the method comprising steps of:
- coupling the first single phase power terminal to the first motor terminal;
- coupling the second single phase power terminal to the second motor terminal;
- coupling the first, second and third single phase power terminals to a solid-state phase inverter, wherein the solid-state phase inverter has an phase inverter output that is phase shifted from the input;
- and
- coupling the phase inverter output to the third motor terminal.
Dependencies are inferred from the claim text.