Inverters, Controlled Rectifiers, and the SCR. In many cases, the distinction between a rectifier and an inverter is artificial; In a rectifier, energy flows from an ac source to a dc load.
In an inverter, the flow is from a dc source to an ac load. An inverter thus has much the same function as a rectifier, except for the direction of energy flow. A ‘generic conversion circuit,’ connecting an ac circuit to a dc circuit, could support bidirectional energy flow. Such a circuit provides dual rectifier and inverter operation. The image below is an example using parallel and series elements to handle thousands of megawatts.