The fuel cell system according to one embodiment of the present invention includes the solid oxide fuel cell configured to generate power by receiving the supply of the cathode gas and the anode gas. The fuel cell system includes a discharging passage configured to discharge the cathode off-gas and the anode off-gas discharged by the fuel cell as discharged gas to the outside, a discharged-gas temperature detection unit configured to detect or estimate the temperature of the discharged gas discharged from the discharging passage, an air supplying unit configured to supply air to the discharging passage, and the control unit configured to control the air supply to be executed by an air supplying unit on the basis of the detected or estimated temperature.

The fuel cell system according to one embodiment of the present invention includes the solid oxide fuel cell configured to generate power by receiving the supply of the cathode gas and the anode gas. The fuel cell system includes a discharging passage configured to discharge the cathode off-gas and the anode off-gas discharged by the fuel cell as discharged gas to the outside, a discharged-gas temperature detection unit configured to detect or estimate the temperature of the discharged gas discharged from the discharging passage, an air supplying unit configured to supply air to the discharging passage, and the control unit configured to control the air supply to be executed by an air supplying unit on the basis of the detected or estimated temperature.

The metallic case of a power conversion apparatus includes a casing having a side wall, as well as an upper case and a lower case, a first area being formed between a cooling jacket provided at the inner periphery of the side wall and the lower case, the metal base plate dividing the first area between the cooling jacket and the upper case into a lower side second area and an upper side third area, first and second power modules being fastened to a top surface and a capacitor module being provided in the first area, driving circuits that drive inverter circuits of the power modules respectively being provided in the second area, and a control circuit that controls the driver circuits being provided in the third area.

The metallic case of a power conversion apparatus includes a casing having a side wall, as well as an upper case and a lower case, a first area being formed between a cooling jacket provided at the inner periphery of the side wall and the lower case, the metal base plate dividing the first area between the cooling jacket and the upper case into a lower side second area and an upper side third area, first and second power modules being fastened to a top surface and a capacitor module being provided in the first area, driving circuits that drive inverter circuits of the power modules respectively being provided in the second area, and a control circuit that controls the driver circuits being provided in the third area.

An electric assist bicycle and a drive system therefor includes a controller that includes control modes in which different assist ratios are calculated as control modes of the electric motor, and that stores a mode change condition that determines a change of the control mode. The controller performs the mode change when a pedal is located between an angular position that follows by 45 degrees a lowermost position of a locus of the pedal and an angular position that precedes by 45 degrees the lowermost position. Accordingly, the mode change is performed when the pedaling force exerted by a rider is relatively low such that the rider does not feel uncomfortable due to a rapid change of the load applied to the rider.

A power conversion apparatus connected to three or more voltage units, includes three or more power conversion circuits connected to respective units of the three or more voltage units; and a multiport transformer connected to the three or more power conversion circuits at mutually different ports, in which at least one voltage unit of the three or more voltage units is an electrical load.

Current imbalances between parallel switching devices in a power converter half leg are reduced. A gate driver generates a nominal PWM gate drive signal for a respective half leg. A first feedback loop couples the nominal PWM gate drive signal to a gate terminal of a respective first switching device. The first feedback loop has a first mutual inductance with a current path of a first parallel switching device and has a second mutual inductance with a current path of a second parallel switching device. The first and second mutual inductances are arranged to generate opposing voltages in the first feedback loop, so that when all the parallel switching devices carry equal current then the voltages cancel.

Current imbalances between parallel switching devices in a power converter half leg are reduced. A gate driver generates a nominal PWM gate drive signal for a respective half leg. A first feedback loop couples the nominal PWM gate drive signal to a gate terminal of a respective first switching device. The first feedback loop has a first mutual inductance with a current path of a first parallel switching device and has a second mutual inductance with a current path of a second parallel switching device. The first and second mutual inductances are arranged to generate opposing voltages in the first feedback loop, so that when all the parallel switching devices carry equal current then the voltages cancel.

Provided are a method and apparatus for determining motor temperature, and a storage medium. The method includes: obtaining an electromagnetic loss of each node in ξ nodes acquired by decomposing components of a motor, wherein the ξ is a natural number greater than 1, and at least one component in the components of the motor is decomposed into multiple nodes in the ξ nodes; obtaining a thermal resistance between every two nodes in the ξ nodes; and determining a temperature of the motor based on the electromagnetic loss of the each node in the ξ nodes and the thermal resistance between the every two nodes in the ξ nodes.

A motor driving control device drives each of a first motor and a second motor based on a predetermined condition designation signal, and includes a control unit, a first motor driving unit and a second motor driving unit. The control unit outputs first and second PWM signals to control driving of the first and second motors, respectively. Each of the first and second motor driving units flow a current through the first and second motors based on the first and second PWM signals, respectively. The control unit includes a determination means configured to determine whether the condition designation signal meets a predetermined mode switching condition, and an adjustment means configured to perform overlapping-related adjustment of an on period of the first PWM signal and an on period of the second PWM signal, based on a determination result of the determination means.