Abstract: A damper device that suppresses arc discharge between electrodes generated by bubbles in an electro-rheological fluid, includes an inner tube housed in an outer tube forming an outer shell of a damper device. An electrode tube is arranged between the outer tube and the inner tube. An electro-rheological fluid is sealed in the outer tube. The inner tube and the electrode tube constitute a cathode and an anode, respectively, and apply a voltage to the electro-rheological fluid located between the inner tube and the electrode tube. An insulating layer is provided on a surface of the electrode tube on a side facing the inner tube or on a surface of the inner tube on a side facing the electrode tube. When a maximum voltage applied to the electro-rheological fluid is Vmax (V), a thickness t (m) of the insulating layer is set to satisfy Formula (1).

Abstract: Provided are a reliable high-voltage system and a failure diagnosis method thereof, in which a vibration damping mechanism using an electrorheological fluid as a working fluid is a load, and can prevent electric shock due to leakage current and the influence on surrounding electronic devices. There are provided a first circuit that includes a power source and a ground, a second circuit that is magnetically coupled to the first circuit via a transformer and includes a load connected to the ground, a controller that is connected to the ground, a third circuit that is connected to the second circuit and the ground, a first resistor that is provided between a connection point at a high potential end of the second circuit and the ground, and a second resistor that is provided between a connection point at a low potential end of the second circuit and the ground, and has a resistance value different from a resistance value of the first resistor.

Abstract: A damper device that suppresses arc discharge between electrodes generated by bubbles in an electro-rheological fluid, includes an inner tube housed in an outer tube forming an outer shell of a damper device. An electrode tube is arranged between the outer tube and the inner tube. An electro-rheological fluid is sealed in the outer tube. The inner tube and the electrode tube constitute a cathode and an anode, respectively, and apply a voltage to the electro-rheological fluid located between the inner tube and the electrode tube. An insulating layer is provided on a surface of the electrode tube on a side facing the inner tube or on a surface of the inner tube on a side facing the electrode tube. When a maximum voltage applied to the electro-rheological fluid is Vmax (V), a thickness t (m) of the insulating layer is set to satisfy Formula (1).

Abstract: Provided are a reliable high-voltage system and a failure diagnosis method thereof, in which a vibration damping mechanism using an electrorheological fluid as a working fluid is a load, and can prevent electric shock due to leakage current and the influence on surrounding electronic devices. There are provided a first circuit that includes a power source and a ground, a second circuit that is magnetically coupled to the first circuit via a transformer and includes a load connected to the ground, a controller that is connected to the ground, a third circuit that is connected to the second circuit and the ground, a first resistor that is provided between a connection point at a high potential end of the second circuit and the ground, and a second resistor that is provided between a connection point at a low potential end of the second circuit and the ground, and has a resistance value different from a resistance value of the first resistor.

Abstract: Provided is a power converter for converting a DC input voltage to a DC output voltage and outputting the DC output voltage to a load, including: a discharge resistor which discharges electric charges accumulated in the load, a discharge switch which switches an electric conduction state of the discharge resistor; and a discharge controller which controls the discharge switch so that the output voltage becomes a predetermined target voltage, wherein the discharge controller controls the discharge switch to cut off electric conduction of the discharge resistor when the output voltage is lower than a predetermined threshold voltage that is higher than the target voltage, and wherein the discharge controller corrects the threshold voltage in response to a temperature change of the load.

Abstract: Call connection processing is performed and a message is processed in a different subnet without UATI reassignment and takeover of a wireless session. RANs that belong to different subnets and are adjacent to each other use messages to exchange ColorCode, IP addresses of base station controllers, wireless resource information of base station transceiver subsystems and the like. When the RAN receives, from an AT, a message having ColorCode that is different from ColorCode of the RAN, the RAN transfers the message to a base station controller included in the RAN having ColorCode that matches the ColorCode included in the message.

Abstract: The present invention provides with a terminal having a monitoring period changing function for changing the value (monitoring period) of a no-traffic monitoring timer of the terminal by feeding back the information on radio signal conditions, and a no-traffic monitoring function for changing the status of the call of the terminal to “a disconnected state for only receiving radio signal from a base station” depending on the value (monitoring period) of the no-traffic monitoring timer based on the information fed back.

Abstract: In a base station controller for controlling the operation of a base station for executing call control which permits a connection in response to a connecting request from a radio terminal, when a stop instruction of the call control of the base station is received, the number of radio terminals which can be connected to the base station is decreased and thereafter the call control is stopped, and when the call control of the base station is restarted, the number of radio terminals which can be connected to the base station is increased.

Abstract: When measurement results of received radio wave intensities of wireless base stations, which demands a soft handoff, are received from a wireless terminal in a wireless communication system and when a base station controller attempts to acquire a traffic channel in a wireless base station, via which a wireless communication path will be added, in the state in which the channel resource usage rate of that wireless base station is over a threshold, a traffic channel may be acquired only if the ratio between the radio wave intensity of the wireless base stations establishing communication paths and the radio wave intensity of the wireless base station via which a communication path will be added is higher than a threshold or if the difference between the radio wave intensity of the wireless base stations and the radio wave intensity of the wireless base station smaller than a threshold.

Abstract: Call connection processing is performed and a message is processed in a different subnet without UATI reassignment and takeover of a wireless session. RANs that belong to different subnets and are adjacent to each other use messages to exchange ColorCode, IP addresses of base station controllers, wireless resource information of base station transceiver subsystems and the like. When the RAN receives, from an AT, a message having ColorCode that is different from ColorCode of the RAN, the RAN transfers the message to a base station controller included in the RAN having ColorCode that matches the ColorCode included in the message.

Abstract: In a base station controller for controlling the operation of a base station for executing call control which permits a connection in response to a connecting request from a radio terminal, when a stop instruction of the call control of the base station is received, the number of radio terminals which can be connected to the base station is decreased and thereafter the call control is stopped, and when the call control of the base station is restarted, the number of radio terminals which can be connected to the base station is increased.

Abstract: The present invention provides with a terminal having a monitoring period changing function for changing the value (monitoring period) of a no-traffic monitoring timer of the terminal by feeding back the information on radio signal conditions, and a no-traffic monitoring function for changing the status of the call of the terminal to “a disconnected state for only receiving radio signal from a base station” depending on the value (monitoring period) of the no-traffic monitoring timer based on the information fed back.

Abstract: When measurement results of received radio wave intensities of wireless base stations, which demands a soft handoff, are received from a wireless terminal in a wireless communication system and when a base station controller attempts to acquire a traffic channel in a wireless base station, via which a wireless communication path will be added, in the state in which the channel resource usage rate of that wireless base station is over a threshold, a traffic channel may be acquired only if the ratio between the radio wave intensity of the wireless base stations establishing communication paths and the radio wave intensity of the wireless base station via which a communication path will be added is higher than a threshold or if the difference between the radio wave intensity of the wireless base stations and the radio wave intensity of the wireless base station smaller than a threshold.