Inverter
AssigneeQBYSS Ltd
InventorLee Harrison
Life of this patent
Estimating the term…
Abstract
There is provided a high frequency AC inverter comprising a DC-DC circuit having a variable output, an output power circuit and a load circuit and a controller, the load circuit comprising a load circuit detector configured to detect the electrical parameters of the load circuit. The output power circuit comprises a DC to AC driver having a variable frequency output, a HFAC driver circuit comprising a resonant network and a transformer coupled to the HFAC driver circuit and the load circuit. The controller is configured to control the output of the DC to DC circuit to control the current on the load circuit to maintain it within a predetermined range.
Claims16
A high frequency alternating current (HFAC) inverter for an HFAC system, the HFAC inverter comprising:
- a DC-DC circuit having a variable output, an output power circuit and a controller, the output power circuit being arranged for inductive coupling with a load circuit comprising:
- a power bus carrying HFAC for powering a plurality of inductively powered devices placed along the power bus and;
- a load circuit detector configured to detect electrical parameters of the load circuit;
- the output power circuit comprising:
- a DC to AC driver having a variable frequency output;
- a HFAC driver circuit comprising a resonant network;
- and
- a transformer coupled to the HFAC driver circuit and the load circuit;
- wherein the controller is configured to control the output of the DC to DC circuit to control the current on the load circuit to maintain it within a predetermined range;
- and
- wherein the resonant network comprises a first resonant tank, a second resonant tank and a third resonant tank, the first resonant tank comprising a series LC circuit and having a first resonant frequency, the second resonant tank comprising a parallel LC circuit and having a second resonant frequency, the third resonant tank comprising a series capacitor and a parallel LC circuit and having a third resonant frequency and wherein the first resonant frequency and the second resonant frequency are the same and the third resonant frequency is greater than the first resonant frequency.
A high frequency alternating current (HFAC) inverter for an HFAC system, the HFAC inverter comprising:
- a DC-DC circuit having a variable output, an output power circuit and a controller, the output power circuit being arranged for inductive coupling with a load circuit comprising:
- a power bus carrying HFAC for powering a plurality of inductively powered devices placed along the power bus and;
- a load circuit detector configured to detect electrical parameters of the load circuit;
- the output power circuit comprising:
- a DC to AC driver having a variable frequency output;
- a HFAC driver circuit comprising a resonant network;
- and
- a transformer coupled to the HFAC driver circuit and the load circuit;
- wherein the controller is configured to control the output of the DC to DC circuit to control the current on the load circuit to maintain it within a predetermined range;
- and
- wherein the resonant network comprises a first resonant tank, a second resonant tank and a third resonant tank, the first resonant tank comprising a series LC circuit and having a first resonant frequency, the second resonant tank comprising a parallel LC circuit and having a second resonant frequency, the third resonant tank having a first part comprising a parallel LC circuit having a third resonant frequency and a second part comprising a series inductor, wherein the first resonant frequency, the second resonant frequency and the third resonant frequency are substantially the same.
Dependencies are inferred from the claim text.