Abstract: Provided are a cap seal with which molding of a seal material by hand can be omitted and variation in cap seal mounting quality can be minimized, a fastening structure provided with said cap seal, and a method for mounting a cap seal. This cap seal comprises: a plurality of cap parts (11) which have an opening (11b) in one end, inside of which a space (11a) is formed, and which have insulation; and a base part (12) which connects the peripheries at the ends of the cap parts (11) on the opening (11b)-sides together and which has insulation; the cap parts (11) accommodating seal members and protruding parts of fastening members inside the spaces (11a), and the opening (11b)-side surface of the base part (12) being fabricated into a mounting surface (16).

Abstract: Provided is an ion generating device for organic matter decomposition for generating ions to decompose organic matter stored in a tank. The ion generating device includes a needle electrode and a plate electrode, both facing each other, and a direct-current power supply unit configured to apply a direct-current voltage with positive polarity to the needle electrode. The direct-current power supply unit includes a voltage controller configured to set the direct-current voltage to a specified voltage value to produce positive corona discharge between the needle electrode and the plate electrode under atmospheric pressure.

Abstract: There is provided a driving system including a motor; an inverter configured to drive the motor; a power storage device connected with the inverter via a power line; a smoothing capacitor mounted to the power line; a voltage sensor configured to detect a voltage of the smoothing capacitor; a current sensor configured to detect an electric current of each phase of the motor; and a control device configured to control the inverter, based on a detected value of the current sensor. The control device performs Fourier series expansion of a detected value of the voltage sensor to calculate an electrical first variation component of the voltage of the smoothing capacitor. The control device controls the inverter, such that the electrical first variation component of the voltage of the smoothing capacitor becomes equal to a value 0.

Abstract: A control apparatus sets a value of the field current command and a value of the armature related command in accordance with drive information and the setting information stored in the storage unit; the value of the field current command and the value of the armature related command correspond to the obtained drive information. The control apparatus controls a field current flowing through the field winding to the set value of the field current command, and controls a current flowing through the armature winding or a voltage applied to the armature winding to the set value of the armature related command.

Abstract: Provided are a cap seal with which molding of a seal material by hand can be omitted and variation in cap seal mounting quality can be minimized, a fastening structure provided with said cap seal, and a method for mounting a cap seal. This cap seal comprises: a plurality of cap parts (11) which have an opening (11b) in one end, inside of which a space (11a) is formed, and which have insulation; and a base part (12) which connects the peripheries at the ends of the cap parts (11) on the opening (11b)-sides together and which has insulation; the cap parts (11) accommodating seal members and protruding parts of fastening members inside the spaces (11a), and the opening (11b)-side surface of the base part (12) being fabricated into a mounting surface (16).

Abstract: Provided is an ion generating device for organic matter decomposition for generating ions to decompose organic matter stored in a tank. The ion generating device includes a needle electrode and a plate electrode, both facing each other, and a direct-current power supply unit configured to apply a direct-current voltage with positive polarity to the needle electrode. The direct-current power supply unit includes a voltage controller configured to set the direct-current voltage to a specified voltage value to produce positive corona discharge between the needle electrode and the plate electrode under atmospheric pressure.

Abstract: A feedback control switching unit of an inverter control unit selects, based on a magnitude relationship between a predetermined switching determination amount and at least one switching threshold, at least one of feedback control units to thereby execute switching among feedback control modes, such as a current feedback control mode and a torque feedback control mode, of the respective feedback control units for driving of the AC motor. A switching command generating unit generates a switching command for an inverter based on a manipulated variable calculated by the selected feedback control unit. When a torque response request determining unit determines that a required torque responsiveness is high, the feedback control switching unit reduces the number of executions of switching among the feedback control modes.

Abstract: A control device alternately turns on an upper arm switch and a lower arm switch constituting an inverter on the basis of an operation pattern that is a time-series pattern that defines a switching pattern for each of the upper arm switch and the lower arm switch. The control device detects each of a present pattern that is the operation pattern currently set and a next pattern that is the operation pattern to be set next time. A plurality of timings is set in the middle of the present pattern over one electrical angle period as candidates of switching from the present pattern to the next pattern, and the control device selects a command switching timing from among the plurality of timings. The control device switches the operation pattern from the present pattern to the next pattern at the selected command switching timing.

Abstract: There is provided a driving system including a motor; an inverter configured to drive the motor; a power storage device connected with the inverter via a power line; a smoothing capacitor mounted to the power line; a voltage sensor configured to detect a voltage of the smoothing capacitor; a current sensor configured to detect an electric current of each phase of the motor; and a control device configured to control the inverter, based on a detected value of the current sensor. The control device performs Fourier series expansion of a detected value of the voltage sensor to calculate an electrical first variation component of the voltage of the smoothing capacitor. The control device controls the inverter, such that the electrical first variation component of the voltage of the smoothing capacitor becomes equal to a value 0.

Abstract: A control apparatus sets a value of the field current command and a value of the armature related command in accordance with drive information and the setting information stored in the storage unit; the value of the field current command and the value of the armature related command correspond to the obtained drive information. The control apparatus controls a field current flowing through the field winding to the set value of the field current command, and controls a current flowing through the armature winding or a voltage applied to the armature winding to the set value of the armature related command.

Abstract: A feedback control switching unit of an inverter control unit selects, based on a magnitude relationship between a predetermined switching determination amount and at least one switching threshold, at least one of feedback control units to thereby execute switching among feedback control modes, such as a current feedback control mode and a torque feedback control mode, of the respective feedback control units for driving of the AC motor. A switching command generating unit generates a switching command for an inverter based on a manipulated variable calculated by the selected feedback control unit. When a torque response request determining unit determines that a required torque responsiveness is high, the feedback control switching unit reduces the number of executions of switching among the feedback control modes.

Abstract: A control device stores a plurality of operation patterns associated with each of synchronous numbers and modulation factors, and the synchronous numbers each define the upper limit of the number of switching operations for each switch constituting an inverter. The control device selects an appropriate operation pattern from among the stored operation patterns, and operates each switch on the basis of the selected operation pattern. The control device stores a plurality of operation patterns associated with the same modulation factor for the same synchronous number. In a case where there is a plurality of next patterns as operation patterns corresponding to a next modulation factor, the control device selects, from among the next patterns, an operation pattern with a small change from a currently set operation pattern.

Abstract: A control device alternately turns on an upper arm switch and a lower arm switch constituting an inverter on the basis of an operation pattern that is a time-series pattern that defines a switching pattern for each of the upper arm switch and the lower arm switch. The control device detects each of a present pattern that is the operation pattern currently set and a next pattern that is the operation pattern to be set next time. A plurality of timings is set in the middle of the present pattern over one electrical angle period as candidates of switching from the present pattern to the next pattern, and the control device selects a command switching timing from among the plurality of timings. The control device switches the operation pattern from the present pattern to the next pattern at the selected command switching timing.

Abstract: The boost system performs switching control of a first switching element and a second switching element, based on a result of comparison between the boost carrier and a duty command based on a required duty, with regard to each of a decreasing region where the boost carrier decreases and an increasing region where the boost carrier increases. The boost system sets the required duty to the duty command, with regard to the greater between the required duty in the decreasing region and the required duty in the increasing region, while setting the duty command by imposing a limitation on the required duty by lower limit guarding, such that an average duty in each one period of the boost carrier becomes equal to or greater than a lower limit duty, with regard to the smaller between the required duty in the decreasing region and the required duty in the increasing region.

Abstract: In a control apparatus for a power conversion apparatus, a spectrum changing unit changes a spectrum of at least one of bus harmonic components and switch harmonic components so as to meet at least one of a separation condition and a reduction condition. The bus harmonic components are harmonic components superimposed on a voltage of the bus in accompaniment with on-off operations of switches configuring at least one power conversion apparatuses. The switch harmonic components are harmonic components included in a switching pattern of switches configuring the remaining at least one power conversion apparatus. The separation condition is that the frequencies of both harmonic components are separated by a predetermined value or more. The reduction condition is that an amplitude of at least one harmonic component is reduced when the difference between the frequencies of both harmonic components is less than the predetermined value.

Abstract: A control device stores a plurality of operation patterns associated with each of synchronous numbers and modulation factors, and the synchronous numbers each define the upper limit of the number of switching operations for each switch constituting an inverter. The control device selects an appropriate operation pattern from among the stored operation patterns, and operates each switch on the basis of the selected operation pattern. The control device stores a plurality of operation patterns associated with the same modulation factor for the same synchronous number. In a case where there is a plurality of next patterns as operation patterns corresponding to a next modulation factor, the control device selects, from among the next patterns, an operation pattern with a small change from a currently set operation pattern.

Abstract: A control apparatus for an AC motor includes an inverter, a voltage-command calculation unit calculating a vector used for giving a command to the inverter, a voltage-waveform specifying unit specifying, as a voltage waveform for operating the inverter based on the vector, a pulse pattern selected from previously stored voltage waveforms, or a voltage waveform of a PWM signal generated by a comparison between a phase voltage and a carrier wave, an amplitude-spectrum extraction unit obtaining a bus current of the inverter to extract an amplitude spectrum of a specific frequency corresponding to a resonance frequency of a circuit through which the bus current flows, and a voltage-amplitude limiting unit limiting an amplitude of the vector so that the amplitude spectrum of the specific frequency becomes less than a threshold, if the amplitude spectrum of the specific frequency correlating with the voltage waveform is the threshold or more.

Abstract: A control apparatus operates an inverter by overmodulation pulse width modulation control or rectangular wave control to control an output torque of a motor to a command torque. When a first condition is not met, the inverter is operated by the overmodulation pulse width modulation control. The first condition is that an amplitude parameter increases and reaches a determination value. The amplitude parameter is an amplitude of an output voltage vector of the inverter or a modulation factor of the output voltage of the inverter. When the first condition and a second condition are met, operation of the inverter is switched from operation by the overmodulation pulse width modulation control to operation by the rectangular wave control. The second condition is that a change amount in a negative d-axis direction of a current vector of current flowing to the motor after the first condition is met reaches a predetermined amount.

Abstract: In a control apparatus for a rotating electric machine, a phase feedback gain is set such that first and second conditions are met. The first condition is that gain margin and phase margin in frequency characteristics of a first loop transfer function are ensured. The second condition is that a gain intersection angular frequency in frequency characteristics of the first loop transfer function is lower than respective resonance angular frequency in frequency characteristics of first and second transfer functions. An amplitude feedback gain is set such that third and fourth conditions are met. The third condition is that gain margin and phase margin in frequency characteristics of a second loop transfer function are ensured. The fourth condition is that a gain intersection angular frequency in frequency characteristics of a second loop transfer function is lower than respective resonance angular frequency in frequency characteristics of third and fourth transfer functions.

Abstract: In a control apparatus for a power conversion apparatus, a spectrum changing unit changes a spectrum of at least one of bus harmonic components and switch harmonic components so as to meet at least one of a separation condition and a reduction condition. The bus harmonic components are harmonic components superimposed on a voltage of the bus in accompaniment with on-off operations of switches configuring at least one power conversion apparatuses. The switch harmonic components are harmonic components included in a switching pattern of switches configuring the remaining at least one power conversion apparatus. The separation condition is that the frequencies of both harmonic components are separated by a predetermined value or more. The reduction condition is that an amplitude of at least one harmonic component is reduced when the difference between the frequencies of both harmonic components is less than the predetermined value.