Abstract: An inverter electric generator system is comprised of: master and at least one slave inverter generators, each inverter generator including a communication section, a controller section generating a PWM carrier and an inverter circuit switched by the PWM carrier to generate an alternative current with a controlled voltage and a controlled frequency, the communication sections being mutually connected to exchange a communication data, and the inverter circuits being connected in parallel so as to collect and output the alternative currents as an electric power output, wherein each of the controller sections is configured to synchronize any point of the PWM carrier with any bit of the communication data received by the communication section. The PWM carriers of the master and the slave inverter generators thereby mutually get synchronized.

Abstract: An inverter device includes a voltage command value output unit that outputs a voltage command value, voltage sensors that detect output voltage from a switching circuit, a Fourier transform unit that performs frequency analysis on the output voltage detected by the respective voltage sensors, and a voltage correction value calculation unit that obtains harmonics with respect to a drive frequency of the switching circuit subjected to the frequency analysis by the Fourier transform unit and obtains a voltage correction coefficients for correcting the voltage command value so as to cancel the harmonics. The voltage correction value calculation unit calculates coefficients each for each degree of the harmonics and determines whether the coefficients converges when calculating the coefficients so as to obtain the voltage correction coefficients based on the coefficients which are determined to converge.

Abstract: An inverter power generator includes a current controller 14a setting a current limit ratio according to a rotation speed of a synchronous motor 13 and controls a converter current according to the current limit ratio. The current controller sets the current limit ratio to 70% if the synchronous motor is at a rotational speed equal to an idle speed of an engine 11. Until the rotational speed of the synchronous motor reaches a rated speed, the output current limiter linearly increases the current limit ratio up to 100%. With this, the rotational speed of the engine becomes reasonably increasable even if a sudden load increase occurs when the engine is operating at low speed.

Abstract: An inverter includes a voltage command generator generating a voltage command value according to an externally specified voltage value, a PWM signal generator generating a PWM signal according to the voltage command value and frequency command value, and a switching unit generating a three-phase AC power according to the PWM signal. The voltage command generator decreases the voltage command value if the output current increases, to prevent the rotation speed of a prime move from suddenly changing. If the output current exceeds a preset upper current threshold, the voltage command value is clamped at a preset minimum output voltage, thereby securing the minimum output voltage for an increase in the output current.

Abstract: An inverter power generator includes a current controller 14a setting a current limit ratio according to a rotation speed of a synchronous motor 13 and controls a converter current according to the current limit ratio. The current controller sets the current limit ratio to 70% if the synchronous motor is at a rotational speed equal to an idle speed of an engine 11. Until the rotational speed of the synchronous motor reaches a rated speed, the output current limiter linearly increases the current limit ratio up to 100%. With this, the rotational speed of the engine becomes reasonably increasable even if a sudden load increase occurs when the engine is operating at low speed.

Abstract: An inverter includes a voltage command generator generating a voltage command value according to an externally specified voltage value, a PWM signal generator generating a PWM signal according to the voltage command value and frequency command value, and a switching unit generating a three-phase AC power according to the PWM signal. The voltage command generator decreases the voltage command value if the output current increases, to prevent the rotation speed of a prime move from suddenly changing. If the output current exceeds a preset upper current threshold, the voltage command value is clamped at a preset minimum output voltage, thereby securing the minimum output voltage for an increase in the output current.

Abstract: An image forming apparatus includes: an image data processing unit that extracts one image area for each page from bitmap images for a continuous even number of pages of an identical sheet size and creates a combined image obtained by combining these image areas; and a print processing unit that prints the combined image on one print sheet or a size same as the sheet size.

Abstract: The invention provides an image forming system in which an image forming apparatus (MFP) is connected to a host device through a network, wherein a command for a processing of print data of a user is accepted, a presence of a print job specifying a storage processing by the user is detected from the command, the print job thus detected is displayed on the host device, the user can select whether the detected print job can be renewed or not, and renewal information of the print job is added and data are transmitted from the host device to the MFP when the renewal of the print job is selected.

Abstract: An image forming apparatus of the invention outputs page number position information to indicate a position of a page number on an original document, generates image data of the original document by optically reading the original document to which the page number is given, compares, from the generated image data of each of a plurality of original documents, page numbers of the plurality of original documents subjected to an OCR processing based on the page number position information, detects missing of an original document among the plurality of read original document, determines that an abnormality exists in the image data corresponding to the missing original document, and re-reads the original document corresponding to the image data determined to be abnormal among the stored respective image data, and therefore, since the image data of only the page of the missing original document among the plurality of pages is captured, the convenience of the user is improved.

Abstract: The image forming apparatus of this invention has a printing time specifying function, and includes: a printer unit configured to print an image on paper, which is transferred from a paper feed unit, in either a normal print mode or a high speed print mode; a time specifying processing unit configured to receive print data in which a printing time is specified, and schedule a printing time on the basis of the print data of the printing time; and a control unit configured to check the process schedule of the other print data in advance of starting the print process of the print data relating to the time specified printing, and perform the print process of the print data relating to the time specified printing and the print process of the other print data in the high speed print mode if it is estimated that the print process of the print data as time specified cannot be finished by the printing time as desired.

Abstract: An image forming apparatus includes: an image data processing unit that extracts one image area for each page from bitmap images for a continuous even number of pages of an identical sheet size and creates a combined image obtained by combining these image areas; and a print processing unit that prints the combined image on one print sheet or a size same as the sheet size.

Abstract: An image forming apparatus according to this invention comprises: a printer unit for printing and outputting image data; a mode setting unit for setting a print mode to the printer unit, said mode setting unit having an operating unit that can be operated by a user; a submitting unit for submitting recommended modes which are some of print modes relating to a specific job-setting item when the user input the specific job-setting item by operating the operating unit to set the print mode; and a control unit for controlling the printer unit, causing the printer unit to print and output the image data in a mode selected from the recommended modes presented by the submitting unit.

Abstract: There is disclosed an image forming apparatus, a program for printing with marks added, and a method for printing with marks added, which facilitate adding of marks to print data and reediting thereof. The image forming apparatus performs printing of data constituted by print data added with marks, and comprises: a print data storage section that stores print data; a marking data storage section that stores, as marking data, a character attribute indicative of a preset expression method such as character decoration; and a marking-printing section that prints a result of applying the character attribute to the print data.

Abstract: There is disclosed an image forming apparatus, image forming apparatus control program, and image forming apparatus control method which facilitate permission to access a document file. The image forming apparatus comprises: a document file registration section which creates a document file according to an instruction from a first user and registers the document file together with a contact address of the first user; an information obtaining section which receives an access request for access to the document file, according to an instruction from a second user, obtains a contact address of the second user, based on the access request, and obtains the contact address of the first user from the document file; a permission request sending section which sends, to the contact address of the first or second user, a permission request for permission to access the document file; and a document file sending section which sends the document file to the second user if the permission is received.

Abstract: The image forming apparatus of this invention has a printing time specifying function, and comprises: a printer unit configured to print an image on paper, which is transferred from a paper feed unit, in either a normal print mode or a high speed print mode; a time specifying processing unit configured to receive print data in which a printing time is specified, and schedule a printing time on the basis of the print data of the printing time; and a control unit configured to check the process schedule of the other print data in advance of starting the print process of the print data relating to the time specified printing, and perform the print process of the print data relating to the time specified printing and the print process of the other print data in the high speed print mode if it is estimated that the print process of the print data as time specified cannot be finished by the printing time as desired.

Abstract: An object of the present invention is to make a difference between display data to be displayed on a destination terminal and print data, thereby preventing a data falsification from being performed. A network printing system includes a data server 10 connected to a plurality of terminals (21 to 23) via a network and a printing system 40 connected to the network. When receiving, from a source terminal, print data, an address to be used for data transfer to a destination terminal, and Input of a watermark to be added at the time of data transfer to the destination terminal, the data server 10 creates display data corresponding to the print data by adding the watermark to the print data, sends a data URL to a destination terminal whose address has been input, thereby performing distribution processing to the destination terminal and distribution of the print data to which the watermark has been added in response to a printing request for the printing system.

Abstract: A data providing apparatus includes an input unit which inputs printing data, a setting unit which sets a selection condition, an acquiring unit which is connected to a network, and acquires a plurality of status information concerning a plurality of image forming apparatuses on the network, a selection unit which calculates evaluation of the plurality of image forming apparatuses on the basis of the selection condition and the plurality of status information, and selects one image forming apparatus according to the calculation result, and a transfer unit which transfers the printing data input by the input unit in order to provide the printing data to the one image forming apparatus selected by the selection unit. Data can be automatically provided to the optimum image forming apparatus on the network.

Abstract: A system and method for printing image data at a hardcopy device includes receiving the image data to be printed from a user, determining if the received image data has at least one predetermined error, and notifying the user if the received image data is determined to have at least one predetermined error. An indication is received from the user whether to print the image data in response to the notification to the user.