Patent ID: 9160173
Filing Date: 2015-10-13
Classification: H02J,H02M,Y02E,Y02P

Abstract:
1. A DC-to-AC power converter apparatus comprising an AC line filter inductor with an associated inductance, an arrangement of semiconductor switching devices, a control circuit, a DC input with an associated DC input voltage, an AC output with both an associated AC output voltage and current wherein said DC-to-AC power converter apparatus converts power from a coupled DC source over a range of voltages and wherein said DC-to-AC power converter apparatus sources power to a coupled AC load over a range of AC output voltages and currents and wherein said DC-to-AC power converter apparatus is specified for operation between a minimum rated AC output current and a peak rated AC output current and wherein a ripple current is generated by the power converter apparatus as an artifact of a switch mode power conversion method for said arrangement of semiconductor switching devices and wherein said AC line filter inductor has a non-linear, current-to-inductance characteristic where the inductance of said AC line filter inductor exhibits more than a 20% decrease in said inductance when operating at said peak rated AC output current relative to said inductance when operating at said minimum rated AC output current and wherein said arrangement of semiconductor switching devices comprises at least one semiconductor switch which is driven on for an on-time and driven off for an off-time wherein the on-time plus the off-time is the switching period and wherein the on-time divided by the switching period is the duty cycle and wherein said at least one semiconductor switch which is driven on for the on-time and driven off for the off-time is driven under command of said control circuit in response to at least one of said inductance of said AC line filter inductor, said DC input voltage or said AC output current.