9 Electric power converters, namely, direct current (DC) to alternating current (AC) converters, AC to DC converters, DC to DC converters, AC to AC converters, frequency converters, voltage converters, and phase converters; uninterruptible power supply system comprised of flywheels; uninterruptible power sources (UPS), namely, DC UPS and AC UPS; and power supplies, namely, pulsed power supplies