Abstract: A tap changing regulator with at least one regulator stage that has a set of input taps and a set of switches in a switching matrix. The have respective on-off modes to connect one or more of the taps to an output voltage to effect a number of regulation steps, where the ratio of the number of regulation steps to the number of taps is always greater than 1:1. The regulator taps are spaced between sets of windings having a progressive windings ratio of 1 to 3 to 2, or integer multiples of that ratio. Series connected additional regulator stages have an input tap with a windings ratio that is twice the sum of the first stage regulation steps, plus 1.

Abstract: A cascading tap changing regulator has a set of input taps to power multiple stages of the cascade. Each tap in the set of taps is selectively engagable in respective on-off modes to effect a number of regulation steps, and a ratio of the number of steps to the number of taps in the set is greater than 1:1.

Abstract: An electronic load testing system is configured to emulate aspects of an integrated circuit (IC). A control module of the system is configured to be electrically coupled to a first location on a printed circuit board (PCB) of an electronic assembly, and a load module is configured to be electrically coupled to a second location on the PCB. The load module includes a load cell configured to selectively conduct current from a power supply of the electronic assembly. The first location and the second location are spaced apart and in electronic communication via one or more traces of the PCB. The control module is configured to communicate with the load module via the one or more traces of the PCB. In some examples, the load module and the IC have an equivalent form factor, such that the load module can be installed in place of the IC.

Abstract: A cascading tap changing regulator has a set of input taps to power both stages of the cascade, each stage having its own series injection transformer to regulate the output. A set of switches are selectively engagable in respective on-off modes to effect a number of regulation steps, and a ratio of the number of steps to the number of switches in the set is greater than 1:1.

Abstract: A cascading tap changing regulator has a set of input taps to power both stages of the cascade, each stage having its own series injection transformer to regulate the output. A set of switches are selectively engagable in respective on-off modes to effect a number of regulation steps, and a ratio of the number of steps to the number of switches in the set is greater than 1:1.

Abstract: The method of the invention in one aspect involves electronic power control by varying the amplitude of an electrical power supply voltage, independent of frequency, whereby the output frequency will always be the same as the input frequency. An electrical circuit apparatus for accomplishing this function in a specific embodiment is also disclosed herein. The specific circuitry of this aspect of the invention uses eight solid state switches, such as IGBT's, eight diodes, an inductor, input and output filters and novel controlling circuitry. The controller apparatus and methods of the invention may be used to implement all otherwise conventional converter types, buck, boost, and inverting (and duals of these) versions to obtain different regulating characteristics, including galvanic isolation of the output from the input.