Abstract: A capacitor bank includes first and second spaced opposite polarity DC bus bars and first and second spaced printed circuit boards that extend between the bus bars. A single face of the printed circuit boards includes first and second mutually insulated metal cladding segments. Plural first and second main capacitors have first and second opposite polarity electrodes extending from a single face thereof.

Abstract: A plurality of conventional, parallel a.c. to d.c. to a.c. to d.c. converters are driven by a common a.c. source supply current to a common load. Each of the converters includes a controller for a pulse width modulated chopper; the controller determines the amplitude of d.c. current at the output terminals of the particular converter. Input terminals of each controller are responsive to the output voltage of the particular converter with which the controller is associated. A common controller for the controllers of the individual converters is responsive to the load voltage. The common controller varies the impedance of a single variable impedance connected in parallel to remote sense input terminals of the controller of each of the converters.