Abstract: A matrix converter includes a plurality of first bidirectional switches electrically connected to each of input phases of an AC power supply and each of output phases of a load, respectively, and a plurality of second bidirectional switches electrically connected to each of the input phases and each of the output phases, respectively. The first bidirectional switch and the second bidirectional switch are electrically connected in parallel to one of the input phases and one of the output phases.

Abstract: A capacitor module applicable in a matrix convertor includes a module cover and a plurality of terminals. The module cover houses a plurality of AC capacitors. The plurality of terminals are disposed at least on a first side and a second side of the module cover in a widthwise direction of the module cover, and protrude from a bottom surface of the module cover.

Abstract: A matrix converter includes a plurality of first bidirectional switches electrically connected to each of input phases of an AC power supply and each of output phases of a load, respectively, and a plurality of second bidirectional switches electrically connected to each of the input phases and each of the output phases, respectively. The first bidirectional switch and the second bidirectional switch are electrically connected in parallel to one of the input phases and one of the output phases.

Abstract: A power supply path b (b1 to b6) is connected between a pair of positive and negative power terminals a1, a2. A first timer circuit c is connected to the power terminals a1, a2. The first timer circuit is initially on-state and interrupts the power supply path when a predetermined period of time has elapsed after electricity is conducted. A second timer circuit d is connected to the power supply path b via the first timer circuit. The second timer circuit is initially on-state and becomes off-state when a period of time determined according to a voltage between the power terminals has elapsed. Since a light emitting element e is connected to the power supply path via the second timer circuit, the light emitting element flashes when the second timer circuit is on-state, and the light emitting element is turned off when the second timer circuit becomes off-state.

Abstract: A capacitor module applicable in a matrix convertor includes a module cover and a plurality of terminals. The module cover houses a plurality of AC capacitors. The plurality of terminals are disposed at least on a first side and a second side of the module cover in a widthwise direction of the module cover, and protrude from a bottom surface of the module cover.