Abstract: A control apparatus for an electric railcar that provides control so that when rotational speed of a motor decreases below a required value, torque of the motor will decrease at a required rate of change, a current limiter for limiting a torque current command “(A)Iqp” output from a current command arithmetic unit is provided to ensure that when the rotational speed of the motor decreases below the required value, the torque current command will be limited to a command value “(B)Iqp” smaller than that command value, and to ensure that a carrier frequency at which PWM signals are created when switching elements of the electric power converter are controlled by carrier generator is controlled to become lower than a carrier frequency existing when the rotational speed of the motor decreases below the required value.

Abstract: A power control apparatus for controlling charging and discharging of a plurality of storage means devices has a voltage measuring arrangement for measuring voltages of each of the storage devices, a current measuring arrangement for measuring currents flowing through each of the storage devices, a status detector for detecting the operating status of each storage device from values measured by the voltage and current measuring arrangements, and a charging/discharging control device for controlling currents, voltages, or power according to the operating status of each storage devices detected by the status detector to charge or discharge the storage devices.

Abstract: The invention provides a battery module including an output breaker that ensures safe and prompt installation of batteries in a system. The battery module includes one or more batteries and a case housing the batteries and having output terminals, each output terminal being connected to a positive or negative electrode of the housed battery, the battery module further including means for turning on and off the connection between the output terminal and the positive or negative electrode of the battery. The means for turning on and off the connection may include a contact subjected to making and breaking operations and a screw for making and breaking the contact, the screw having an insulator at an interface with the contact.

Abstract: A power control apparatus for controlling charging and discharging of a plurality of storage means (101a, . . . ) has voltage measuring means (102a, . . . ) for measuring voltages of said storage means respectively, current measuring means (103a, . . . ) for measuring currents flowing through said storage means respectively, a status detecting means (104) for detecting the operating status of each storage means from values measured by said voltage measuring means and said current measuring means, and a charging/discharging controlling means (105) for controlling currents, voltages, or power according to the operating status of each storage means detected by said status detecting means to charge or discharge said storage means.

Abstract: A power control apparatus for controlling charging and discharging of a plurality of storage devices has a voltage measuring arrangement for measuring voltages of each of the storage devices, a current measuring arrangement for measuring currents flowing through each of the storage devices, a status detector for detecting the operating status of each storage device from values measured by the voltage and current measuring arrangements, and a charging/discharging control device for controlling currents, voltages, or power according to the operating status of each storage devices detected by the status detector to charge or discharge the storage devices.

Abstract: A control apparatus for an electric railcar that provides control so that when rotational speed of a motor decreases below a required value, torque of the motor will decrease at a required rate of change, a current limiter for limiting a torque current command “(A)Iqp” output from a current command arithmetic unit is provided to ensure that when the rotational speed of the motor decreases below the required value, the torque current command will be limited to a command value “(B)Iqp” smaller than that command value, and to ensure that a carrier frequency at which PWM signals are created when switching elements of the electric power converter are controlled by carrier generator is controlled to become lower than a carrier frequency existing when the rotational speed of the motor decreases below the required value.

Abstract: A hybrid transport vehicle, which needs an overhead wire and/or a railway and has a plurality of kinds of energy supply systems and/or driving apparatuses, is provided with a condition detection device for detecting an energy supply condition of the energy supply systems and/or an operation condition of the driving apparatuses, and an informing device for informing the energy supply condition and/or the operation condition, detected by the condition detection device.

Abstract: A power control apparatus for controlling charging and discharging of a plurality of storage means (101a, . . . ) has voltage measuring means (102a, . . . ) for measuring voltages of said storage means respectively, current measuring means (103a, . . . ) for measuring currents flowing through said storage means respectively, a status detecting means (104) for detecting the operating status of each storage means from values measured by said voltage measuring means and said current measuring means, and a charging/discharging controlling means (105) for controlling currents, voltages, or power according to the operating status of each storage means detected by said status detecting means to charge or discharge said storage means.

Abstract: An object of the present invention is to minimize the switching elements' heat loss occurring when the operating frequency for PWM inverter control (that is to say, the inverter frequency) passes through a zero point, and thereby maintain sufficient braking force until the electric railcar has stopped.

Abstract: To determine the timing of the electrical brake for completely stopping in electrical braking control, and also to achieve both sure stopping and good riding comfort in an electric vehicle powered by the motor by decreasing the braking force at a prescribed rate of change, the torque of the electric motor is controlled by controlling the power converter which powers the motor using a power converter controller. The deceleration of the motor is computed based on the detected speed of the electric motor which is as an output of the speed detection means, the subsequent speed of the electric motor is estimated based on the detected speed and the deceleration rate of the electric motor at the time the detected rotational speed of the electric motor falls below a prescribed speed, and torque control is carried out using an electric power converter controller, based on the estimated speed.