Abstract: Provided are a transformed cell having the ability to produce 2,5-pyridine dicarboxylic acids, and a method for producing 2,5-pyridine dicarboxylic acids using the same. The present invention provides a transformed cell having the ability to produce 2,5-pyridine dicarboxylic acids, the transformed cell being derived from a microbe having the ability to biosynthesize 4-aminobenzoic acids and having the enhanced expression of the following polypeptides (I) and (II): (I) a polypeptide having 4-aminobenzoic acid hydroxylation activity, and (II) a polypeptide having 4-amino-3-hydroxybenzoate 2,3-dioxygenase activity.

Abstract: A motor drive device includes a power conversion circuit that drives an AC motor and a controller that controls the power conversion circuit. The controller includes a command current calculation unit generating a command current according to command torque for the AC motor and a current control unit that performs feedback control for adjusting a current applied to the AC motor to the command current. The controller also includes a control gain setting unit that calculates a control gain used for the feedback control based on the command torque and sets the calculated control gain in the current control unit. The control gain setting unit performs control such that a time from a decrease of an absolute value of the command torque to switching of the control gain is longer than a time from an increase of the absolute value of the command torque to switching of the control gain.

Abstract: A motor drive device (200) includes: a power conversion circuit (204) that drives an AC motor; and a controller (203) that controls the power conversion circuit. The controller includes: a command current calculation unit (206) that generates a command current according to command torque for the AC motor; a current control unit (208) that performs feedback control for adjusting a current applied to the AC motor to the command current; and a control gain setting unit (207) that calculates a control gain used for the feedback control based on the command torque and sets the calculated control gain in the current control unit. The control gain setting unit performs control such that a time from a decrease of an absolute value of the command torque to switching of the control gain is longer than a time from an increase of the absolute value of the command torque to switching of the control gain. As a result, deterioration of control stability of motor torque during a transient response is avoided.

Abstract: Provided is a method for manufacturing a 3-hydroxy-4-aminobenzoic acid by using a microorganism. The method for manufacturing a 3-hydroxy-4-aminobenzoic acid comprises a step of bringing a 4-aminobenzoic acid into contact with a microorganism that produces the following polypeptide (A) or (B): (A) a polypeptide consisting of an amino acid sequence shown in SEQ ID NO: 2 or a polypeptide consisting of an amino acid sequence that has at least 90% identity to the amino acid sequence shown in SEQ ID NO: 2 and has 4-hydroxybenzoate hydroxylase activity, (B) a polypeptide consisting of an amino acid sequence shown in SEQ ID NO: 6 or a polypeptide consisting of an amino acid sequence that has at least 90% identity to the amino acid sequence shown in SEQ ID NO: 6 and has 4-hydroxybenzoate hydroxylase activity.

Abstract: Stable current control is performed even at the time of occurrence of disturbance, while the steadily occurring current pulsation is suppressed. A motor drive device 100 includes a power conversion circuit 103 that drives an alternating-current motor 101, and a controller 102 that controls the power conversion circuit 103. The controller 102 includes a voltage command calculation unit 108, a control state judgement unit 112, and a control gain change unit 113.

Abstract: Provided is a method for manufacturing a 3-hydroxy-4-aminobenzoic acid by using a microorganism. The method for manufacturing a 3-hydroxy-4-aminobenzoic acid comprises a step of bringing a 4-aminobenzoic acid into contact with a microorganism that produces the following polypeptide (A) or (B): (A) a polypeptide consisting of an amino acid sequence shown in SEQ ID NO: 2 or a polypeptide consisting of an amino acid sequence that has at least 90% identity to the amino acid sequence shown in SEQ ID NO: 2 and has 4-hydroxybenzoate hydroxylase activity, (B) a polypeptide consisting of an amino acid sequence shown in SEQ ID NO: 6 or a polypeptide consisting of an amino acid sequence that has at least 90% identity to the amino acid sequence shown in SEQ ID NO: 6 and has 4-hydroxybenzoate hydroxylase activity.

Abstract: Stable current control is performed even at the time of occurrence of disturbance, while the steadily occurring current pulsation is suppressed. A motor drive device 100 includes a power conversion circuit 103 that drives an alternating-current motor 101, and a controller 102 that controls the power conversion circuit 103. The controller 102 includes a voltage command calculation unit 108, a control state judgement unit 112, and a control gain change unit 113.

Abstract: Provided is a microorganism having high sophorolipid production capability. Disclosed is a sophorolipid-producing yeast mutant strain, in which a polypeptide consisting of the amino acid sequence set forth in SEQ ID NO:2 or an amino acid sequence having at least 90% identity therewith, has been deleted or deactivated.

Abstract: Improvement in C4 dicarboxylic acid productivity in a host cell is provided. A polypeptide consisting of the amino acid sequence represented by SEQ ID NO: 2 or an amino acid sequence having at least 90% identity therewith.

Abstract: Improvement in C4 dicarboxylic acid productivity in a host cell is provided. A polypeptide consisting of the amino acid sequence represented by SEQ ID NO: 2 or an amino acid sequence having at least 90% identity therewith.

Abstract: Provided is a microorganism exhibiting high production capability for sophorolipids. Disclosed is a yeast mutant strain having high sophorolipid productivity, in which a transporter transporting Acyl-CoA to a peroxisome has been deleted or deactivated.

Abstract: Provided is a promoter suitable for the high expression of a gene of interest. A promoter consisting of a DNA selected from the group consisting of the following (a) to (d): (a) a DNA comprising the nucleotide sequence represented by any one of SEQ ID NOs: 1 to 3; (b) a DNA consisting of a nucleotide sequence having at least 70% identity to the nucleotide sequence represented by any one of SEQ ID NOs: 1 to 3 and having a promoter activity; (c) a DNA consisting of a nucleotide sequence wherein one or several of nucleotides are deleted, substituted or added in the nucleotide sequence represented by any one of SEQ ID NOS: 1 to 3 and having a promoter activity; and (d) a DNA which hybridizes with a DNA consisting of a nucleotide sequence complementary to the nucleotide sequence represented by any one of SEQ ID NOs: 1 to 3 under stringent conditions and which has a promoter activity.

Abstract: Provided is a microorganism exhibiting high production capability for sophorolipids. Disclosed is a yeast mutant strain having high sophorolipid productivity, in which a transporter transporting Acyl-CoA to a peroxisome has been deleted or deactivated.

Abstract: A power converter includes a plurality of converters which are connected in parallel to a DC power supply in which an operating point is changed in accordance with an output current or an output voltage. The plurality of converters include maximum power point tracking units for performing maximum power point tracking calculations of the DC power supply. Results of the maximum power point tracking calculations of the plurality of converters are unified between the plurality of converters and the plurality of converters are controlled based on the unified calculation result.

Abstract: Provided is a promoter suitable for the high expression of a gene of interest. A promoter consisting of a DNA selected from the group consisting of the following (a) to (d): (a) a DNA comprising the nucleotide sequence represented by any one of SEQ ID NOs: 1 to 3; (b) a DNA consisting of a nucleotide sequence having at least 70% identity to the nucleotide sequence represented by any one of SEQ ID NOs: 1 to 3 and having a promoter activity; (c) a DNA consisting of a nucleotide sequence wherein one or several of nucleotides are deleted, substituted or added in the nucleotide sequence represented by any one of SEQ ID NOS: 1 to 3 and having a promoter activity; and (d) a DNA which hybridizes with a DNA consisting of a nucleotide sequence complementary to the nucleotide sequence represented by any one of SEQ ID NOs: 1 to 3 under stringent conditions and which has a promoter activity.

Abstract: Provided is a microorganism having high sophorolipid production capability. Disclosed is a sophorolipid-producing yeast mutant strain, in which a polypeptide consisting of the amino acid sequence set forth in SEQ ID NO:2 or an amino acid sequence having at least 90% identity therewith, has been deleted or deactivated.

Abstract: A power conversion system is capable of distinguishing easily and clearly between being interconnected to the power system and being in an isolated operation. The power conversion system converts DC power to AC power to interconnect with a power system and injects reactive power into a grid node for determining an isolated operation, including: a voltage detector that detects an output voltage at the grid node; a current detector that detects an output current at the grid node; a frequency measurement unit that measures a frequency of the output voltage at the grid node; a reactive-power measurement unit that measures reactive power at the grid node; and an isolated-operation determination unit that determines whether or not the power conversion system is in an isolated operation as disconnected from the power system. The isolated-operation determination unit includes a reactive-power-fluctuation determination unit that performs a first isolated-operation determination from the reactive power.

Abstract: A power converter includes a plurality of converters which are connected in parallel to a DC power supply in which an operating point is changed in accordance with an output current or an output voltage. The plurality of converters include maximum power point tracking units for performing maximum power point tracking calculations of the DC power supply. Results of the maximum power point tracking calculations of the plurality of converters are unified between the plurality of converters and the plurality of converters are controlled based on the unified calculation result.

Abstract: A power storage system is provided with charge switches, discharge switches, a bidirectional DC/DC converter and a power storage system controller connecting all the battery packs to an external circuit to achieve parallel charge and discharge, and the power storage system starts the charge by setting a rated charge current value per one battery pack to Iset and setting the rated charge current value Iset as an initial value of a charge current command value Iref(1), thereafter monitor the charge current of each of the battery packs after elapse of a predetermined time so as to subtract its maximum value Ibmax(1) from the charge current command value Iref(1), and add the rated charge current value Iset to result of subtraction Ierr (Iref(1)?Ibmax(1)) so as to set as a new charge current command value Iref(2) and carry out pre-charge in such a manner as to carry on the charge.

Abstract: A resonant power supply includes a full bridge circuit having a first switching leg and a second switching leg and a control unit that controls operations of a first upper arm switching device and a first lower arm switching device constituting the first switching leg, and a second upper arm switching device and a second lower arm switching device constituting the second switching leg and feeds power to a load from a DC power supply via the full bridge circuit. The control unit controls the full bridge circuit so as to have a phase difference between a turn-off of the first upper arm switching device and the turn-off of the second lower arm switching device, and increases the phase difference in accordance with increase of a switching frequency of the full bridge circuit.