摘要:
In a driving apparatus of a power semiconductor element for conducting or interrupting a main current, first resistance variable for changing a first resistance according to a control voltage, and second resistance variable for changing a second resistance according to a voltage between a first and a second terminal are provided, and either one of a voltage of a control power supply or a voltage between the first and the second terminal is voltage-divided by the first resistance and the second resistance, and the divided voltage is applied to a control gate terminal at the time of conducting or interrupting the main current.
摘要:
A power inverter using a voltage driven switching element, capable of suppressing an excessive surge voltage which is generated on high-speed switching of IGBTs or MOSFETs, and suppressing radio frequency oscillation after the suppression of the surge voltage. The power inverter includes a switching element rendering a power path conducting and non-conducting, and a speeding-up circuit of a feedback path in an active clamping circuit added to the switching element.
摘要:
In a driving apparatus of a power semiconductor element for conducting or interrupting a main current, first resistance variable for changing a first resistance according to a control voltage, and second resistance variable for changing a second resistance according to a voltage between a first and a second terminal are provided, and either one of a voltage of a control power supply or a voltage between the first and the second terminal is voltage-divided by the first resistance and the second resistance, and the divided voltage is applied to a control gate terminal at the time of conducting or interrupting the main current.
摘要:
A gate drive circuit of a voltage drive switching element, which is characterized by control of di/dt and dv/dt when an IGBT is switched by controlling increases in the switching time and loss of the IGBT, includes a drive means for amplifying a signal for controlling the switching operation of a voltage drive switching device including the IGBT, a means for detecting the gate voltage of the IGBT, a voltage decrease (increase) means for slowly decreasing (increasing) the output voltage when the drive means is turned on (off) in the course of time, and a voltage increase (decrease) means for slowly increasing (decreasing) the output voltage. By switching from the voltage decrease (increase) means to the voltage increase (decrease) means according to the detected value of the gate voltage of the IGBT, di/dt and dv/dt are controlled when the IGBT is turned on (off).
摘要:
A level shifting circuit, satisfying a requirement of a high tolerated dV/dt level, and a highly reliable inverter circuit, wherein a set pulse signal and a reset pulse signal, both of which are level-shifted to a potential side taking as reference a reference potential of a gate control terminal of a switching terminal, are obtained differentially and integrated, and, in case these pulse signals equal or exceed stipulated integrated values, are transmitted as regular control signals controlling the on/off state.
摘要:
A level shifting circuit, satisfying a requirement of a high tolerated dV/dt level, and a highly reliable inverter circuit, wherein a set pulse signal and a reset pulse signal, both of which are level-shifted to a potential side taking as reference a reference potential of a gate control terminal of a switching terminal, are obtained differentially and integrated, and, in case these pulse signals equal or exceed stipulated integrated values, are transmitted as regular control signals controlling the on/off state.
摘要:
A level shifting circuit, satisfying a requirement of a high tolerated dV/dt level, and a highly reliable inverter circuit, wherein a set pulse signal and a reset pulse signal, both of which are level-shifted to a potential side taking as reference a reference potential of a gate control terminal of a switching terminal, are obtained differentially and integrated, and, in case these pulse signals equal or exceed stipulated integrated values, are transmitted as regular control signals controlling the on/off state.
摘要:
A communication system includes a mobile terminal; an information processing apparatus; and a device. The mobile terminal communicates with the information processing apparatus. The mobile terminal communicates with the device. The device communicates with the information processing apparatus. The mobile terminal includes a first processor executing a process including transmitting, by a first communication device, output data to be output by the device, to the information processing apparatus; and transmitting, by a second communication device, acquisition location specification information to the device, the acquisition location specification information specifying a location from which the output data is to be acquired by the device from the information processing apparatus. The device includes a second processor executing a process including receiving the acquisition location specification information from the mobile terminal; acquiring the output data from the information processing apparatus according to the acquisition location specification information; and outputting the output data.
摘要:
A butt position detecting method for a weld joint, when an arrangement direction of a first member and a second member is defined as a first direction, and a direction that is perpendicular to the first direction is defined as a second direction, the first member has a corner portion and a chamfer portion, and a two-dimensional displacement sensor is arranged at a position offset from the butt portion toward the first member side in the first direction, and such that an angle θs at which the second direction and an optical axis direction of irradiation light of the two-dimensional displacement sensor intersect with each other and an angle θa at which the second direction and a formation direction of the chamfer portion of the first member intersect with each other satisfy a condition expression: 0°
摘要:
It is a task of the present application to provide a butt position detecting method for a weld joint and a butt position detecting device for a weld joint that can detect a position of a butt portion between both members with high accuracy while reducing costs, and a manufacturing a weld joint that carries out the butt position detecting method. Thus, according to one aspect of the invention, in a butt position detecting method for a weld joint, when an arrangement direction of a first member and a second member is defined as a first direction, and a direction that is perpendicular to the first direction is defined as a second direction, the first member has a corner portion and a chamfer portion, and a two-dimensional displacement sensor is arranged at a position offset from the butt portion toward the first member side in the first direction, and such that an angle θs at which the second direction and an optical axis direction of irradiation light of the two-dimensional displacement sensor intersect with each other and an angle θa at which the second direction and a formation direction of the chamfer portion of the first member intersect with each other satisfy a condition expression: 0°