For instance, Inverter Refrigerators consume comparatively lesser energy than a typical non-inverter refrigerator. CSI inverter commutation methods include load commutation and parallel capacitor commutation. The origins of electromechanical inverters explain the source of the term "inverter". This in turn controls a high-voltage () DC-AC inverter or a matrix of LEDs. These filters are usually near the alternating current terminal of the static inverter transformer. A CSI inverter is the dual of a six-step voltage source inverter. The input voltage depends on the design and purpose of the inverter. Grid side converter is identical in structure to the transistor inverter controlling the machine. There are many different power circuit topologies and control strategies used in inverter designs. Figure 9 shows the circuit schematic of this inverter. The main applications are in variable speed motor drives, high power inverter and traction. One additional 12AX7 tube is utilized for the phase inverter of the power section. Hence an inverter is an inverted converter. The combination of alternating current motor, battery, and inverter has a claimed efficiency of 92%. This is an example of a three level inverter&colon; the two voltages and ground.