Switching circuit for inverters and the like

Claim 2

An electrical circuit of the type having first and second on/off circuit elements capable of being switched on and off by an external control signal, connected in series with a power supply, with auxiliary drive means connected to said on/off circuit elements for simultaneously actuating them to become conductive and non-conductive, respectively, and with a load connected at a first junction point between said on/off circuit elements, wherein the improvement comprises: a first inductor in series with said first on/off circuit element, said first inductor and said first on/off circuit element both being on the same side of said first junction point; a second inductor in series with said second on/off circuit element, said second inductor and said second on/off circuit element both being on the same side of said first junction, with said second inductor being uncoupled relative to said first inductor; and first capacitive means connected between said power supply and said first junction point.

Claim 3

The electrical circuit of claim 1 including a first diode connected in parallel with said first on/off circuit element and said first inductor, and a second diode connected in parallel with said second on/off circuit element and said second inductor, said fiRst and second diodes being oriented to allow current to pass in a direction toward a positive voltage terminal of said power supply.

Claim 4

The electrical circuit of claim 1 including a diode connected in parallel with said first inductor, and another diode connected in parallel with said second inductor, said diodes being oriented to allow current to pass in a direction toward a positive voltage terminal of said power supply.

Claim 5

The electrical circuit of claim 1 wherein said first capacitive means includes a capacitor connected in parallel with said first inductor and said first on/off circuit element, and another capacitor connected in parallel with said second inductor and said second on/off circuit element.

Claim 6

The electrical circuit of claim 1 having third and fourth on/off circuit elements capable of being switched on and off by an external control signal, connected in series with said power supply and in parallel with said first and second on/off circuit elements, with said auxiliary drive means connected to said third and fourth on/off circuit elements for simultaneously actuating them to become non-conductive and conductive, respectively, and with said load connected at a second junction point between said third and fourth on/off circuit elements, and including; a third inductor in series with said third on/off circuit element, said third inductor and said third on/off circuit element both being on the same side of said second junction point; a fourth inductor in series with said fourth on/off circuit element, said fourth inductor and said fourth on/off circuit element both being on the same side of said second junction point, with said third inductor being uncoupled relative to said fourth inductor; and second capacitive means connected between said power supply and said second junction.

Claim 7

An electrical switching circuit of the type having first and second on/off circuit elements capable of being switched on and off by an external control signal, connected in series with a power supply, with auxiliary drive means connected to said on/off circuit elements for simultaneously actuating them to become conductive and non-conductive, respectively, and with a load connected at a junction point between said on/off circuit elements, wherein the improvement comprises: a first inductor in series with said first on/off circuit element, said first inductor and said first on/off circuit element both being in a first line on the same side of said junction point; a second inductor in series with said second on/off circuit element, said second inductor and said second on/off circuit element both being in a second line on the same side of said junction point, with said second inductor being uncoupled relative to said first inductor; first and second capacitors connected in parallel with said first and second lines, respectively; first and second diodes connected in parallel with said first and second lines, respectively; and third and fourth diodes connected in parallel with said first and second inductors, respectively, with said first, second, third, and fourth diodes all being oriented to allow current to pass in a direction toward a positive voltage terminal of said power supply.

Claim 8

An electrical switching circuit of the type having first and second on/off circuit elements capable of being switched on and off by an external control signal, connected in series with a power supply, with auxiliary drive means connected to said on/off circuit elements for simultaneously actuating them to become conductive and non-conductive, respectively, and with a load connected at a junction point between said on/off circuit elements, wherein the improvement comprises: a first inductor in series with said first on/off circuit element, said first inductor and said first on/off circuit element both being in a first line on the same side of said junction point; a second inductor in series with said second on/off circuit element, said second inductor and said second on/off circuit element both being in a second line on the same side of said junction point, with said second inductor being uncoupled relative to said first inductor; first and second capacitors connected in parallel with said first and second lines, respectively; first and second diodes connected in parallel with said first and second lines, respectively; and third and fourth diodes connected in parallel with said first and second inductors, respectively, with said first, second, third, and fourth diodes all being oriented to allow current to pass in a direction toward a positive voltage terminal of said power supply.

Claim 9

In an inverter circuit wherein a first line with a first transistor is connected through a first junction point to a second line with a second transistor, a third line with a third transistor is connected in series through a second junction point to a fourth line with a fourth transistor, said first and second transistors being connected in parallel with said third and fourth transistors to a DC power supply, with auxiliary drive means connected to said transistors for simultaneously actuating said transistors in series to become connected between said first and second junction points, the improvement comprising: first, second, third, and fourth inductors connected in series with and on the same lines as said first, second, third, and fourth Transistors, respectively, said inductors being uncoupled relative to each other; first capacitive means connected between said power supply and said first junction point; and second capacitive means connected between said power supply and said second junction point.

Claim 10

In an inverter circuit wherein a first line with a first transistor is connected through a first junction point to a second line with a second transistor, a third line with a third transistor is connected in series through a second junction point to a fourth line with a fourth transistor, said first and second transistors being connected in parallel with said third and fourth transistors to a DC power supply, with auxiliary drive means connected to said transistors for simultaneously actuating said transistors in series to become connected between said first and second junction points, the improvement comprising: first, second, third, and fourth inductors connected in series with and on the same lines as said first, second, third, and fourth Transistors, respectively, said inductors being uncoupled relative to each other; first capacitive means connected between said power supply and said first junction point; and second capacitive means connected between said power supply and said second junction point.

Claim 11

The inverter circuit of claim 7 including a diode connected in parallel with each of said first, second, third, and fourth lines, respectively, and with said transistor and inductor contained therein.

Claim 12

The inverter circuit of claim 7 including a diode connected in parallel with each of said four inductors, respectively.

Claim 13

The inverter circuit of claim 7 wherein said first capacitive means includes a capacitor connected in parallel with each of said first and second lines, respectively, and with said transistor and inductor contained therein, and said second capacitive means includes a capacitor connected in parallel with each of said third and fourth lines, respectively, and with said transistor and inductor contained therein.

Claim 14

In an inverter circuit wherein a first line with a first transistor is connected in series through a first junction point to a second line with a second transistor, a third line with a third transistor is connected in series through a second junction to a fourth line with a fourth transistor, said first and second transistors being connected in parallel with said third and fourth transistors to a DC power supply, with auxiliary drive means connected to said transistors for simultaneously actuating said transistors in one line to become conductive and nonconductive, respectively, and with a load connected between said first and second junction points, the improvement comprising: an inductor connected in series with and on the same lines as each of said transistors, respectively, with each of said inductors being uncoupled with respect to each other inductor; a diode connected in parallel with each of said lines, respectively, and with said transistor and inductor contained therein; a capacitor connected in parallel with each of said lines, respectively, and with said transistor and inductor contained therein; and a diode connected in parallel with each of said inductors, respectively.

Claim 15

In an inverter circuit wherein a first line with a first transistor is connected in series through a first junction point to a second line with a second transistor, a third line with a third transistor is connected in series through a second junction to a fourth line with a fourth transistor, said first and second transistors being connected in parallel with said third and fourth transistors to a DC power supply, with auxiliary drive means connected to said transistors for simultaneously actuating said transistors in one line to become conductive and nonconductive, respectively, and with a load connected between said first and second junction points, the improvement comprising: an inductor connected in series with and on the same lines as each of said transistors, respectively, with each of said inductors being uncoupled with respect to each other inductor; a diode connected in parallel with each of said lines, respectively, and with said transistor and inductor contained therein; a capacitor connected in parallel with each of said lines, respectively, and with said transistor and inductor contained therein; and a diode connected in parallel with each of said inductors, respectively.