Abstract: In an evaporated fuel processing apparatus, a fuel tank is communicated with a canister via a vapor passage. A canister temperature sensor is disposed around a purge port of the canister for detecting a temperature of the canister. When a large quantity of gas is supplied upon supply of the fuel to flow from the fuel tank to the canister, the peak value of the canister temperature is detected. The fuel adsorbing state within the canister is estimated on the basis of the canister temperature obtained subsequent to detection of the peak value.

Abstract: The present invention relates to a signal processing system, and proposes the establishment of a proper signal path between a signal output device and a signal input device.

Abstract: The present invention relates to a signal processing system, and proposes the switching operation of device selection which is naturally performed for a user. The signal input device 5 comprises a registration means for registering the signal output devices 3, 4, and an establishment means for, when an establishment request signal requesting the establishment of a signal path is sent from any signal output device 3, 4 out of a plurality of the signal output devices 3, 4, judging whether the signal output device 3, 4, which sent the establishment request signal, is registered in the signal input device 5, and establishing the signal path between the signal output device 3, 4 and the signal input device 5 depending on the judged result, thereby avoiding unnatural operation which is not performed in accordance with user operation, thus making it possible to perform the switching operation of device selection which is naturally performed for a user.

Abstract: In an evaporated fuel processing apparatus, a fuel tank is communicated with a canister via a vapor passage. A canister temperature sensor is disposed around a purge port of the canister for detecting a temperature of the canister. When a large quantity of gas is supplied upon supply of the fuel to flow from the fuel tank to the canister, the peak value of the canister temperature is detected. The fuel adsorbing state within the canister is estimated on the basis of the canister temperature obtained subsequent to detection of the peak value.

Abstract: An information processing apparatus having unique information connected to a network together with a plurality of other information processing apparatuses each connected to the network and each having unique information is provided. The apparatus receives unique information for identifying all of the information processing apparatuses on the network, and obtains a network structure of the network based upon the unique information of all of the information processing apparatuses. The apparatus counts a number of connections between all of the information processing apparatuses on the network based upon the network structure, and controls the communication timing of the information apparatuses on the network based upon the number of connections. The apparatus obtains a topology map of the network based upon the unique information of each of the information processing apparatuses.

Abstract: Induction voltage command Em* is obtained from inverter's primary frequency command &ohgr;1* and torque boost voltage commander produces torque boost voltage command &Dgr;Vz* in accordance with &ohgr;1* while integrator produces reference phase command &thgr;d*. uvw/dq converter detects motor excitation current Id (equivalent of no-load current). Next, deviation of excitation current limitation level command Idmax* and detected Id is inputted to limiter processing unit to produce torque boost voltage compensation value &Dgr;Vc for varying &Dgr;Vz* so that Id is smaller than or equal to Idmax*. Inverted &Dgr;Vz* is set up as a lower limiter value of the limiter processing unit. Next, &Dgr;Vc and &Dgr;Vz* are added to produce final compensated torque boost voltage command &Dgr;Vt* and &Dgr;Vt* and Em* are added to produce q-axis voltage command Vq* of the inverter output voltage.

Abstract: An information processing apparatus in a bus system consisting of electronic devices and one or more information processing apparatus to control the electronic devices. The apparatus includes a storage means for storing management information of control software elements for controlling the electronic devices; an acquisition means for acquiring a change of the connection state of each electronic device to a bus constituting the bus system; and an execution means for executing assignment of the control software element, which is used for controlling the electronic device relevant to the acquired change of the connection state, on the basis of the connection state change acquired by the acquisition means.

Abstract: Establishing a current detection system good in accuracy allows implementation of a reduction in the size of an inverter apparatus good in current detection accuracy, even if the number of current sensors is reduced. A current sensor of a DC section and a current sensor corresponding to one phase of an output AC current are used, and means for determining switching patterns of DC main elements and determining a current component of Idc or means for detecting a maximum value of Idc is used, thereby determining an AC current value and a power factor angle.

Abstract: An inverter apparatus for converting a DC power converted from an input AC power to an output AC power of a variable frequency and a variable electric power to drive an induction motor at a variable speed. The inverter apparatus includes a rectifying unit, a filter capacitor, an inverter unit having an input connected across the filter capacitor, an input current detector and a gate circuitry for driving the inverter unit. An excitation current detection unit detects an excitation current of the induction motor from an output signal of the input current detector, a gate signal for driving the gate circuitry and a reference phase command. A setting unit sets a limitation level of the excitation current, a torque boost voltage command unit produces a torque boost voltage command, and a torque boost voltage compensation unit changes the torque boost voltage command so that the detected excitation current value is smaller than or equal to the limitation level.

Abstract: An information processing apparatus having unique information connected to a network together with a plurality of other information processing apparatuses each connected to the network and each having unique information is provided. The apparatus includes a receiving means for receiving the unique information for identifying all of the information processing apparatuses on the network, and a network structure obtaining means for obtaining a network structure of the network based upon the unique information of all of the information processing apparatuses. The apparatus further comprises a counting means for counting a number of connections between all of the information processing apparatuses on the network based upon the network structure, and a controlling means for controlling communication timing of the information apparatuses on the network based upon the number of the connections. The network may be a bus interface, and the information processing apparatus may be an Audio/Visual apparatus.

Abstract: It becomes possible for a user to set a transmission or reception channel arbitrarily and easily, by having each piece of equipment connected to an IEEE 1394 bus include a register provided within a RAM 113 to thereby set a transmission or reception default channel. If channels used in the transmission and the reception are not set when the transmission is started, then the default channel may be used. When equipment is set to a channel setting mode by operating an operation section 116, a control section 112 may display a channel setting picture on a display section 115. In this state, a user may select a set channel by operating an up-key 116a and a down-key 116b of the operation section 116. Thereafter, when a user operates a “YES” key 116c, the control section 112 may write a selected channel in the above-mentioned register, and ends a default channel setting operation. A user can set the transmission or reception channel arbitrarily and easily.

Abstract: In order to supply an AC motor control apparatus which identifies the type of motor automatically, the AC motor control apparatus has a motor type identification means by which the type of motor connected to the motor control apparatus is identified by issuing the appropriate voltage command for motor type identification and judging from the detected current whether the motor rotor is equipped with a magnet and has magnetic salience. The AC motor control apparatus has a control scheme selection means which selects the appropriate control scheme according to the above-identified type of motor and controls the driving of the motor.

Abstract: When a signal path in a signal outputting device is changed, the signal outputting device indicates signal path change information representing the change in the signal path to a signal inputting device. Based on the signal path change information, the signal inputting device adaptively changes a signal path between the signal outputting device and the signal inputting device. The signal inputting device can know the signal path in the signal outputting device easier than heretofore, and can simply change the signal path between the signal outputting device and the signal inputting device.

Abstract: A single-phase PWM converter system in accordance with the present invention employs a sample-and-hold circuit which samples and holds a direct current in the state wherein one of two-phase gate signals of a positive or negative side arm is ON and the other phase is OFF, determines the sign of an output of the sample-and-hold circuit according to the two-phase gate condition, detects a phase current at the input side of the converter, and controls a voltage at the input side of the converter so that the detected current value agrees with a power supply current command. Further, a three-phase PWM converter system in accordance with the present invention detects the effective current and the ineffective current of the power supply current from the direct current, and based on the values, controls the PWM converter so that the sine wave power supply current whose power supply power factor is 1 is provided.

Abstract: It becomes possible for a user to set a transmission or reception channel arbitrarily and easily. Each of equipment connected to an IEEE 1394 bus may include a register provided within a RAM 113 to thereby set a transmission or reception default channel. If channels used in the transmission and the reception are not set when the transmission is started, then default channel may be used. When equipment is set to a channel setting mode by operating an operation section 116, a control section 112 may display a channel setting picture on a display section 115. In this state, a user may select a set channel by operating an up-key 116a and a down-key 116b of the operation section 116. Thereafter, when a user operates a “YES” key 116c, the control section 112 may write a selected channel in the above-mentioned register, and ends a default channel setting operation. A user can set the transmission or reception channel arbitrarily and easily.

Abstract: Establishing a current detection system good in accuracy allows implementation of a reduction in the size of an inverter apparatus good in current detection accuracy, even if the number of current sensors is reduced.

Abstract: Induction voltage command Em* is obtained from inverter's primary frequency command &ohgr;1* and torque boost voltage commander produces torque boost voltage command &Dgr;Vz* in accordance with &ohgr;1* while integrator produces reference phase command &thgr;d*. uvw/dq converter detects motor excitation current Id (equivalent of no-load current). Next, deviation of excitation current limitation level command Idmax* and detected Id is inputted to limiter processing unit to produce torque boost voltage compensation value &Dgr;Vc for varying &Dgr;Vz* so that Id is smaller than or equal to Idmax*. Inverted &Dgr;Vz* is set up as a lower limiter value of the limiter processing unit. Next, &Dgr;Vc and &Dgr;Vz* are added to produce final compensated torque boost voltage command &Dgr;Vt* and &Dgr;Vt* and Em* are added to produce q-axis voltage command Vq* of the inverter output voltage.

Abstract: An inverter device has a three-phase inverter for converting DC electric power into AC power for supplement to an AC electric motor and a control device operatively associated therewith, and the control device includes a phase current detection section for outputting a phase current waveform based on a DC input current and an operational processor section for performing operational processing for control of said inverter device based on the phase current waveform. Thereby, the inverter device can be constructed to be very compact.

Abstract: In order to supply an AC motor control apparatus which identifies the type of motor automatically, the AC motor control apparatus has a motor type identification means by which the type of motor connected to the motor control apparatus is identified by issuing the appropriate voltage command for motor type identification and judging from the detected current whether the motor rotor is equipped with a magnet and has magnetic salience. The AC motor control apparatus has a control scheme selection means which selects the appropriate control scheme according to the above-identified type of motor and controls the driving of the motor.

Abstract: A single-phase PWM converter system in accordance with the present invention employs a sample-and-hold circuit which samples and holds a direct current in the state wherein one of two-phase gate signals of a positive or negative side arm is ON and the other phase is OFF, determines the sign of an output of the sample-and-hold circuit according to the two-phase gate condition, detects a phase current at the input side of the converter, and controls a voltage at the input side of the converter so that the detected current value agrees with a power supply current command.