公开(公告)号：US20230038757A1

公开(公告)日：2023-02-09

申请号：US17790379

申请日：2020-01-21

Applicant: Mitsubishi Electric Corporation

Inventor： Koichi ARISAWA ,  Takaaki TAKAHARA ,  Hajime TOYODA ,  Satoshi MURAKAMI ,  Keisuke UEMURA ,  Takahiko KOBAYASHI

IPC: H02M7/23 ,  H02M1/00 ,  H02M1/32

Abstract: A power converting apparatus that converts alternating-current power from an alternating-current power supply into direct-current power and outputs the direct-current power to a direct-current load includes at least two switching circuits connected in parallel with the direct-current load; a coupling reactor that includes at least three connection terminals with two of the at least three connection terminals connected to an alternating-current terminal of one switching circuit different from two switching circuits among the at least two switching circuits; and a control unit that performs, at least once in a half period of the alternating-current power supply, a simple switching control that short-circuits the coupling reactor to the alternating-current power supply through the two switching circuits.

公开(公告)号：US20140333240A1

公开(公告)日：2014-11-13

申请号：US14163246

申请日：2014-01-24

Applicant: Mitsubishi Electric Corporation

Inventor： Takahiko KOBAYASHI ,  Kiyoharu ANZAI ,  Noriyuki WADA ,  Daiki MATSUURA

IPC: H02P21/14

CPC classification number: H02P21/141 ,  H02P29/662

Abstract: A synchronous machine controller includes a position detecting unit that detects a position of a rotor, a current detecting unit that detects an armature current, a current command generating unit that generates first and second current commands, a voltage command generating unit that generates a voltage command on the basis of the current commands, the position of the rotor, and the armature current, a power converting unit that outputs a voltage to the synchronous machine on the basis of the voltage command, a magnetic flux estimating unit that estimates an armature interlinkage flux on the basis of a rotational velocity calculated from a variation of the position of the rotor, the voltage command, and the armature current, and a magnet state estimating unit that estimates a magnetic flux or a temperature of the permanent magnet from the position of the rotor, the armature current, and the armature interlinkage flux.

Abstract translation: 同步机控制器包括检测转子位置的位置检测单元，检测电枢电流的电流检测单元，产生第一和第二电流指令的电流指令生成单元，产生电压指令的电压指令生成单元 基于电流指令，转子的位置和电枢电流，基于电压指令向同步电机输出电压的功率转换单元，估计电枢互连通量的磁通量估计单元 基于从转子的位置，电压指令和电枢电流的变化计算的旋转速度，以及磁体状态估计单元，其从永久磁铁的位置估计永磁体的磁通量或温度 转子，电枢电流和电枢互连通量。

公开(公告)号：US20230092110A1

公开(公告)日：2023-03-23

申请号：US17800444

申请日：2020-04-25

Applicant: Mitsubishi Electric Corporation

Inventor： Satoru ICHIKI ,  Koichi ARISAWA ,  Kazunori HATAKEYAMA ,  Takahiko KOBAYASHI

IPC: H02P27/06 ,  F24F11/88 ,  H01L25/16 ,  H01L23/00 ,  H01L23/367 ,  H01L23/498 ,  H02M3/156

Abstract: A power converter for converting a voltage of direct-current power output from a direct-current power supply, the power converter including: a printed circuit board; a reactor being configured with a conductor pattern of the printed circuit board; a semiconductor element that is connected to another end of the reactor and performs switching for storing electrical energy in the reactor so as to boost the voltage of the direct-current power from a first voltage to a second voltage; a capacitor that smooths the direct-current power boosted to the second voltage; a diode that is connected to the another end of the reactor and supplies the direct-current power boosted to the second voltage to the capacitor; and a cooler, wherein the reactor, the semiconductor element, and the diode are included in a module in a single package, and the module is cooled by the cooler.

公开(公告)号：US20180241336A1

公开(公告)日：2018-08-23

申请号：US15751183

申请日：2015-09-04

Applicant: Mitsubishi Electric Corporation

Inventor： Keisuke UEMURA ,  Kazunori HATAKEYAMA ,  Yosuke SHINOMOTO ,  Takahiko KOBAYASHI ,  Yasuhiko WADA

IPC: H02P27/08 ,  H02M7/5387 ,  F25B31/02

CPC classification number: H02P27/085 ,  F25B13/00 ,  F25B31/02 ,  F25B2600/021 ,  H02M7/53871 ,  H02P21/05 ,  Y02B30/741

Abstract: A power converting apparatus includes: an inverter converting a direct-current voltage supplied from a power supply unit into an alternating-current voltage and outputting the alternating-current voltage to a motor; and an inverter control unit outputting synchronous PWM (Pulse Width Modulation) signals for driving switching elements of the inverter. A frequency of the synchronous PWM signals is periodically varied when periodic pulsation occurs in a load connected to the motor.

公开(公告)号：US20130249448A1

公开(公告)日：2013-09-26

申请号：US13667673

申请日：2012-11-02

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： Takahiko KOBAYASHI ,  Kiyoharu ANZAI ,  Noriyuki WADA ,  Daiki MATSUURA

IPC: H02P21/14

CPC classification number: H02P21/141 ,  H02P29/662

Abstract: A synchronous machine control apparatus is characterized by including a magnet condition estimation unit (7, 7a) that estimates the temperature or the magnetic flux of a permanent magnet that forms the magnetic field of a synchronous machine (1), and is characterized in that the magnet condition estimation unit (7, 7a) coordinate-converts an armature current into currents on the γ-δ axis consisting of the γ axis and the δ axis that is perpendicular to the γ axis, based on the rotor position and the estimated γ axis, and estimates the temperature or the magnetic flux of the permanent magnet, based on the control command for the synchronous machine (1) and the γ-δ axis currents.

Abstract translation: 同步机控制装置的特征在于包括估计形成同步机（1）的磁场的永磁体的温度或磁通量的磁状态估计单元（7,7a），其特征在于， 磁体条件估计单元（7,7a）基于转子位置和估计的伽马轴将电枢电流坐标转换为由伽马轴和垂直于伽马轴的三角轴组成的伽马三角轴上的电流 ，并且基于同步电机（1）的控制命令和γ-δ轴电流来估计永磁体的温度或磁通量。

公开(公告)号：US20220115974A1

公开(公告)日：2022-04-14

申请号：US17427286

申请日：2019-03-28

Applicant: Mitsubishi Electric Corporation

Inventor： Takahiko KOBAYASHI

IPC: H02P29/024 ,  F25B31/02 ,  F04D25/06 ,  H02P27/08 ,  H02M7/5387 ,  H02M1/00 ,  H02M1/32 ,  H02P29/60

Abstract: A driving apparatus includes: an inverter unit generating a three-phase alternating-current voltage from a direct-current voltage in accordance with a drive signal based on a voltage command and outputting the three-phase alternating-current voltage to a permanent-magnet motor, the permanent-magnet motor including a permanent magnet; a current detection unit detecting a motor current flowing through the permanent-magnet motor; and a control unit generating the voltage command to control an operation of the inverter unit and estimating a temperature of the permanent magnet to perform a protection operation on the inverter unit on the basis of the motor current and an overcurrent protection threshold. The control unit sets the overcurrent protection threshold on the basis of a magnet temperature estimated value of the permanent magnet and any one of a control computation period of the control unit, an output voltage frequency of the inverter unit, and a carrier frequency based on the output voltage frequency of the inverter unit.

公开(公告)号：US20200083835A1

公开(公告)日：2020-03-12

申请号：US16343541

申请日：2016-12-12

Applicant: Mitsubishi Electric Corporation

Inventor： Takahiko KOBAYASHI ,  Shinsaku KUSUBE ,  Kazuyoshi WATABU

IPC: H02P27/04 ,  H02M1/12 ,  H02M1/44 ,  H02M5/458

Abstract: A power conversion device includes a filter unit including an active noise canceler including an active element reducing low frequency components contained in common mode noise of noise and lower than a predetermined threshold frequency, and a passive filter including a passive element reducing normal mode noise of noise and high frequency components contained in the common mode noise of noise and equal to or higher than the threshold frequency. The active noise canceler includes a choke coil having a primary winding to which a first alternating current power is supplied and a secondary winding outputting a current, a filter circuit reducing a high frequency region of the current of the secondary winding, an amplifier circuit amplifying output of the filter circuit and securing a required amount of the current, and a current injection circuit injecting output of the amplifier circuit to each phase of the first alternating current power.

公开(公告)号：US20190293306A1

公开(公告)日：2019-09-26

申请号：US16318459

申请日：2016-09-16

Applicant: Mitsubishi Electric Corporation

Inventor： Yoshihiro TANIGUCHI ,  Shigeo TAKATA ,  Shinsaku KUSUBE ,  Takahiko KOBAYASHI ,  Takanori KOIKE

IPC: F24F1/24

Abstract: A refrigeration cycle apparatus includes a refrigerant circuit through which refrigerant circulates, a control box in which equipment for controlling the refrigeration cycle apparatus is accommodated, and a refrigerator for cooing a heat emitting body exposed from an opening of the control box. The heat emitting body is the equipment accommodated in the control box. The refrigerator includes a cooling body in contact with the heat emitting body, and a refrigerant pipe through which the refrigerant circulating through the refrigerant circuit passes to cool the cooling body. The refrigerant pipe is in contact with the cooling body. The pipe contact surface is different from the heating-body contact surface. The cooling body has a recessed portion at which the cooling body and the heat emitting body are not in contact with each other. The recessed portion is formed in the heating-body contact surface and spaced from the control box.

公开(公告)号：US20190227020A1

公开(公告)日：2019-07-25

申请号：US16309532

申请日：2017-06-08

Applicant: Mitsubishi Electric Corporation

Inventor： Taichiro TAMIDA ,  Takahiro INOUE ,  Takashi HASHIMOTO ,  AKIHIKO IWATA ,  Shuhei KOYAMA ,  Takahiko KOBAYASHI

IPC: G01N27/22 ,  G01N33/28 ,  G01F23/26 ,  H02P27/08 ,  H02M7/5387 ,  F25B31/02

Abstract: Provided is an electrostatic capacitance detection device including: an electrode pair including a pair of electrodes, the electrode pair being arranged inside a compressor configured to compress refrigerant; a capacitor being connected in series to the electrode pair; an inverter having one of power lines connected to one end of series-connected electrode pair and capacitor, and is configured to drive the compressor, the power lines being used for driving the compressor; and a voltage detecting unit configured to measure a voltage between the pair of electrodes of the electrode pair.

公开(公告)号：US20180226913A1

公开(公告)日：2018-08-09

申请号：US15749238

申请日：2015-09-04

Applicant: Mitsubishi Electric Corporation

Inventor： Kazunori HATAKEYAMA ,  Keisuke UEMURA ,  Takahiko KOBAYASHI ,  Yasuhiko WADA

IPC: H02P27/08 ,  H02M7/53846 ,  H02M7/5395 ,  H02M1/084

Abstract: A power converting apparatus for applying to a load an alternating-current voltage converted from a direct-current voltage includes an inverter that receives a PWM signal and applies the alternating-current voltage to the load and an inverter control unit that generates the PWM signal and supplies the PWM signal to the inverter. The frequency of the PWM signal is integer multiples of the frequency of the alternating-current voltage. The alternating-current voltage includes a plurality of positive pulses and a plurality of negative pulses in one cycle of the alternating-current voltage. The number of the positive pulses and the number of the negative pulses are equal.