Abstract: In an elevator renewal construction method, a series of divided construction work steps includes a first divided construction work step including the steps of: installing a communication-enabled hall device at each hall; installing a communication-enabled car device in a car; and installing a communication relay device and connecting the communication relay device and an old control panel to each other; connecting the communication relay device and each of the communication-enabled hall devices to each other and connecting the communication relay device and the communication-enabled car device to each other. After termination of the first divided construction work step, the old control panel is in a state of being communicable with the communication-enabled hall devices and the communication-enabled car device via the communication relay device.

Abstract: A battery inspection apparatus includes: a battery inspection table having a plurality of inspection units each for inspecting a rechargeable battery; and a controller that is provided separately from the battery inspection table and configured to control the battery inspection table. Each of the inspection units includes: a contactor for inspection configured to contact a corresponding battery; and a measurement circuit that is connected to the contactor and configured to generate an analog measured signal by measuring at least one of a current, voltage, and temperature, based on an input from the contactor. The battery inspection table has a control board mounted, the control board being configured to convert the analog measured signal generated by each of the inspection units into a digital signal to output to a common communication cable, and the communication cable connects the control board and the controller together.

Abstract: An industrial machine includes a power converter. The power converter includes: at least one power module; a capacitor; and a bus bar provided between any two among a load to be driven, the power module, and the capacitor. The bus bar includes: a first plate; a second plate; a first spacer configured to support respective corresponding first ends of the first plate and the second plate with a predetermined distance therebetween and to electrically connect the respective first ends of the first plate and the second plate with each other; and a second spacer configured to support respective corresponding second ends of the first plate and the second plate with a predetermined distance therebetween and to electrically connect the respective second ends of the first plate and the second plate with each other.

Abstract: Provided is a working machine capable of decreasing a voltage of a DC busbar (DC bus) with a configuration suppressing a degradation in reliability. A hybrid type construction machine as a working machine includes: a DC bus which is connected to a rotation motor via an inverter circuit, a battery which is connected to the DC bus via a step-up/step-down converter and a switch, a controller which drives the inverter circuit and the step-up/step-down converter, a cooling liquid circulating system which includes a pump motor, and an inverter circuit which is connected to the DC bus and driving the pump motor. The controller includes a mode used for decreasing the voltage of the DC bus, and in that mode, the switch enters a disconnection state and the inverter circuit is operated to consume electricity in the pump motor.

Abstract: An industrial machine includes a power converter. The power converter includes: at least one power module; a capacitor; and a bus bar provided between any two among a load to be driven, the power module, and the capacitor. The bus bar includes: a first plate; a second plate; a first spacer configured to support respective corresponding first ends of the first plate and the second plate with a predetermined distance therebetween and to electrically connect the respective first ends of the first plate and the second plate with each other; and a second spacer configured to support respective corresponding second ends of the first plate and the second plate with a predetermined distance therebetween and to electrically connect the respective second ends of the first plate and the second plate with each other.

Abstract: A hybrid construction machine includes a hydraulic pressure work element driven by hydraulic pressure generated by driving power of an internal combustion engine or a motor generator, and also includes an electric-motor work element driven by an electric motor. A superordinate control unit generates a control command which controls drive of the hydraulic pressure work element and the electric-motor work element. A subordinate control unit controls drive of the hydraulic pressure work element and the electric-motor work element based on the control command generated by the superordinate control unit. The subordinate control unit monitors an error in the superordinate control unit.

Abstract: Provided is a working machine capable of decreasing a voltage of a DC busbar (DC bus) with a configuration suppressing a degradation in reliability. A hybrid type construction machine as a working machine includes: a DC bus which is connected to a rotation motor via an inverter circuit, a battery which is connected to the DC bus via a step-up/step-down converter and a switch, a controller which drives the inverter circuit and the step-up/step-down converter, a cooling liquid circulating system which includes a pump motor, and an inverter circuit which is connected to the DC bus and driving the pump motor. The controller includes a mode used for decreasing the voltage of the DC bus, and in that mode, the switch enters a disconnection state and the inverter circuit is operated to consume electricity in the pump motor.

Abstract: Provided is a working machine capable of decreasing a voltage of a DC busbar (DC bus) with a configuration suppressing a degradation in reliability. A hybrid type construction machine as a working machine includes: a DC bus which is connected to a rotation motor via an inverter circuit, a battery which is connected to the DC bus via a step-up/step-down converter and a switch, a controller which drives the inverter circuit and the step-up/step-down converter, a cooling liquid circulating system which includes a pump motor, and an inverter circuit which is connected to the DC bus and driving the pump motor. The controller includes a mode used for decreasing the voltage of the DC bus, and in that mode, the switch enters a disconnection state and the inverter circuit is operated to consume electricity in the pump motor.

Abstract: Provided is a working machine capable of decreasing a voltage of a DC busbar (DC bus) with a configuration suppressing a degradation in reliability. A hybrid type construction machine as a working machine includes: a DC bus which is connected to a rotation motor via an inverter circuit, a battery which is connected to the DC bus via a step-up/step-down converter and a switch, a controller which drives the inverter circuit and the step-up/step-down converter, a cooling liquid circulating system which includes a pump motor, and an inverter circuit which is connected to the DC bus and driving the pump motor. The controller includes a mode used for decreasing the voltage of the DC bus, and in that mode, the switch enters a disconnection state and the inverter circuit is operated to consume electricity in the pump motor.

Abstract: A hybrid construction machine includes a hydraulic pressure work element driven by hydraulic pressure generated by driving power of an internal combustion engine or a motor generator, and also includes an electric-motor work element driven by an electric motor. A superordinate control unit generates a control command which controls drive of the hydraulic pressure work element and the electric-motor work element. A subordinate control unit controls drive of the hydraulic pressure work element and the electric-motor work element based on the control command generated by the superordinate control unit. The subordinate control unit monitors an error in the superordinate control unit.