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US 7,719,864 B2Granted
Pulse amplitude modulated current converter
AssigneeArray Converter, Inc.
InventorsKent Kernahan, Sorin Andrei Spanoche
Life of this patent
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Abstract
A direct current to pulse amplitude modulated (“PAM”) current converter, denominated a “PAMCC”, is connected to an individual source of direct current. The PAMCC receives direct current and provides pulse amplitude modulated current at its output. The pulses are produced at a high frequency relative to the signal modulated on a sequence of pulses. The signal modulated onto a sequence of pulses may represent portions of a lower frequency sine wave or other lower frequency waveform, including DC.
Claims5
A pulse amplitude modulated current converter, wherein the pulse amplitude current converter is connected to a direct electrical current source, comprising:
- a first and a second input terminal for receiving direct electrical current from the direct electrical current source, wherein one input terminal is connected to a positive electrical output terminal of the direct electrical current source and the other input terminal is connected to a negative electrical output terminal of the direct electrical current source;
- a first coil connected in series with the first input terminal at a first terminal of the first coil;
- a second coil connected in series with the second input terminal at a first terminal of the second coil;
- a switch connected across a second terminal of the first coil and a second terminal of the second coil, wherein the switch includes a first terminal and a second terminal and a control gate;
- a first SCR including a control gate and an anode terminal connected in parallel with the second terminal of the first coil and the first terminal of the switch;
- a second SCR including a control gate and an anode terminal connected in parallel with the second terminal of the first coil and the first terminal of the switch;
- a third SCR including a control gate and a cathode terminal connected in parallel with the second terminal of the second coil and the second terminal of the switch;
- a fourth SCR including a control gate and a cathode terminal connected in parallel with the second terminal of the second coil and the second terminal of the switch;
- a third coil connected between a first output terminal and a parallel connection comprising a cathode terminal of the first SCR, an anode terminal of the third SCR, and a first capacitor in series with a neutral terminal;
- a fourth coil connected between a second output terminal and a parallel connection comprising a cathode terminal of the second SCR, an anode terminal of the fourth SCR, and a second capacitor in series with the neutral terminal;
- and
- a controller, wherein the controller comprises:
- an output terminal connected by a line to the control gate of the switch;
- and
- four output terminals, each output terminal connected to a different SCR control gate by a line wherein the controller provides signals to control the switch and the first and the second and the third and the fourth SCR.
12 more elements
A pulse amplitude modulated current converter, wherein the pulse amplitude current converter is connected to a direct electrical current source, comprising:
- a first and a second input terminal for receiving direct electrical current from the direct electrical current source, wherein one input terminal is connected to a positive electrical output terminal of the direct electrical current source and the other input terminal is connected to a negative electrical output terminal of the direct electrical current source;
- a first coil connected in series with the first input terminal at a first terminal of the first coil;
- a second coil connected in series with the second input terminal at a first terminal of the second coil;
- a first switch connected across the first terminal of the first coil and a second terminal of the second coil wherein the first switch includes a control gate;
- a second switch connected across the first terminal of the second coil and a second terminal of the first coil wherein the second switch includes a control gate;
- a first SCR including a control gate and an anode terminal connected to the second terminal of the first coil;
- a second SCR including a control gate and an anode terminal connected to the second terminal of the first coil;
- a third SCR including a control gate and a cathode terminal connected in parallel with the second terminal of the second coil;
- a fourth SCR including a control gate and a cathode terminal connected in parallel with the second terminal of the second coil;
- a third coil connected between a first output terminal and a parallel connection comprising a cathode terminal of the first SCR, an anode terminal of the third SCR, and a first capacitor in series with a neutral terminal;
- a fourth coil connected between a second output terminal and a parallel connection comprising a cathode terminal of the second SCR, an anode terminal of the fourth SCR, and a second capacitor in series with the neutral terminal;
- a controller, wherein the controller comprises:
- an output terminal connected by a line to the control gate of the first switch;
- an output terminal connected by a line to the control gate of the second switch;
- and
- four output terminals, each output terminal connected by a line to a different SCR control gate wherein the controller provides signals to control the first and the second and the third and the fourth SCR.
13 more elements
Dependencies are inferred from the claim text.