Abstract: In a power converter, a first DC-DC converter converts a DC voltage output from a DC power supply into a DC voltage of a different level. A DC-AC converter converts a DC power output from the first DC-DC converter into an AC power and supplies the AC power to an AC load. A variable load unit connected to a current path that branches from a node between the first DC-DC converter and the DC-AC converter. A controller adjusts the variable load unit so that a total of a power consumption in the AC load and a power consumption in the variable load unit is equal to or larger than a predetermined power value.

Abstract: An autonomous distribution board receives feeding of power via a distribution board for a period during which grid power is supplied from a grid power source, while receiving power via an autonomous terminal of a power conversion apparatus for a period during which supplying of grid power from grid power source is stopped. Autonomous distribution board is connected with a specific load and the like. A measurement point switching apparatus is configured to select one from a current sensor configured to monitor a current that flows through a main breaker, and a current sensor configured to monitor a current that is supplied from power conversion apparatus to autonomous distribution board. A fuel battery is configured to adjust an output thereof based on an output of the selected one so that power by fuel battery is consumed by a general load, specific load and the like.

Abstract: An autonomous distribution board receives feeding of power via a distribution board for a period during which grid power is supplied from a grid power source, while receiving power via an autonomous terminal of a power conversion apparatus for a period during which supplying of grid power from grid power source is stopped. Autonomous distribution board is connected with a specific load and the like. A measurement point switching apparatus is configured to select one from a current sensor configured to monitor a current that flows through a main breaker, and a current sensor configured to monitor a current that is supplied from power conversion apparatus to autonomous distribution board. A fuel battery is configured to adjust an output thereof based on an output of the selected one so that power by fuel battery is consumed by a general load, specific load and the like.

Abstract: Disclosed is a bidirectional DC/DC converter including: a primary side circuit that includes a first DC power source or a first load; a secondary side circuit that includes a second load or a second DC power source; and a power transfer unit that is capable of transferring power bi-directionally between the primary side circuit and the secondary side circuit. Further, the bidirectional DC/DC converter includes a control circuit that controls the primary side circuit and secondary side circuit in such a way that current flows through the power transfer unit from the first DC power source to the second load or from the second DC power source to the first load.

Abstract: Disclosed is a bidirectional DC/DC converter including: a primary side circuit that includes a first DC power source or a first load; a secondary side circuit that includes a second load or a second DC power source; and a power transfer unit that is capable of transferring power bi-directionally between the primary side circuit and the secondary side circuit. Further, the bidirectional DC/DC converter includes a control circuit that controls the primary side circuit and secondary side circuit in such a way that current flows through the power transfer unit from the first DC power source to the second load or from the second DC power source to the first load.

Abstract: A portable radio communication terminal is provided comprising: a radio transmitter/receiver for transmitting and receiving signals over a public mobile communications network, a microphone unit and a loudspeaker unit for entering and releasing the communication signals to be transmitted and received by the radio transmitter/receiver, a light emitter for emitting light to indicate details of an action, an operation entering unit, and a controller. When the normal mode is selected with the operation entering unit, the controller turns the microphone unit, the loudspeaker unit, and the light emitter on to start the communication via the radio transmitter/receiver to a predetermined emergency call station. When the static mode is selected with the operation entering unit, the controller turns the loudspeaker unit and the light emitter off while holding the microphone turned on to start the access via the radio transmitter/receiver to the emergency call station.

Abstract: A portable radio communication terminal is provided comprising: a radio transmitter/receiver for transmitting and receiving signals over a public mobile communications network, a microphone unit and a loudspeaker unit for entering and releasing the communication signals to be transmitted and received by the radio transmitter/receiver, a light emitter for emitting light to indicate details of an action, an operation entering unit, and a controller. When the normal mode is selected with the operation entering unit, the controller turns the microphone unit, the loudspeaker unit, and the light emitter on to start the communication via the radio transmitter/receiver to a predetermined emergency call station. When the static mode is selected with the operation entering unit, the controller turns the loudspeaker unit and the light emitter off while holding the microphone turned on to start the access via the radio transmitter/receiver to the emergency call station.