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    • 1. 发明专利
    • Power conversion device
    • 电源转换器件
    • JP2012253835A
    • 2012-12-20
    • JP2011122090
    • 2011-05-31
    • Mitsubishi Electric Corp三菱電機株式会社
    • KUBOYAMA YUIZUMI KIKUO
    • H02M7/48
    • PROBLEM TO BE SOLVED: To provide a power conversion device that suppresses a harmonic current flowing out from an inverter.SOLUTION: In an output current control section 8, a first controller 822 or a second controller 823 amplifies a difference ΔJa of an output current Ja output from an inverter 4 to a system 9 from a target current Jas, and PWM signal output means 83 generates a PWM signal Sg to control on/off switching elements unshown of the inverter 4. Concurrently, harmonic current detection means 85 detects a harmonic current in the output current Ja, and if a current control system oscillates and exceeds an upper limit value JHL, a comparator 86 outputs a signal of a truth value "1" to controller switching means 821 via an OR circuit 88, and then the controller switching means 821 switches from the first controller 822 to the second controller 823 having a lower gain than the first controller 822, so that the lower gain of the current control system prevents oscillation to suppress the harmonic current flowing out from the inverter 4.
    • 解决的问题:提供抑制从逆变器流出的谐波电流的电力转换装置。 解决方案:在输出电流控制部分8中,第一控制器822或第二控制器823将从反相器4输出的输出电流Ja与系统9的目标电流Jas的差ΔJa放大,并且PWM信号输出 装置83产生PWM信号Sg以控制反相器4的未示出的开关元件的导通/截止。同时,谐波电流检测装置85检测输出电流Ja中的谐波电流,并且如果电流控制系统振荡并超过上限值 JHL,比较器86通过OR电路88将真值“1”的信号输出到控制器切换装置821,然后控制器切换装置821从第一控制器822切换到具有低于 第一控制器822,使得电流控制系统的较低增益防止振荡以抑制从逆变器4流出的谐波电流。版权所有:(C)2013,JPO&INPIT
    • 2. 发明专利
    • Power converter
    • 电源转换器
    • JP2011120325A
    • 2011-06-16
    • JP2009273010
    • 2009-12-01
    • Mitsubishi Electric Corp三菱電機株式会社
    • IZUMI KIKUOIWATA AKIHIKOKUBOYAMA YU
    • H02M7/48H02M7/483
    • PROBLEM TO BE SOLVED: To obtain a compact and low-cost power converter by effectively controlling voltage of a DC power supply of a single-phase inverter connected in series to an AC output line of a three-phase inverter. SOLUTION: The three-phase main inverter 3 connected to the DC power supply 1 is controlled so that each voltage of 1 pulse is outputted as a main voltage pulse during a half period of a phase voltage command, and an output voltage of two inverters 5 connected in series to an output line 37 is controlled, thus supplying a three-phase AC to a load 9, and switching control for reversely moving rise timing and fall timing of the main voltage pulse and control for moving each timing in the same direction according to voltage of a DC capacitor 53 in a sub-inverter 5 and a power factor of the load 9. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:通过有效地控制串联连接到三相逆变器的AC输出线的单相逆变器的直流电源的电压来获得紧凑且低成本的功率转换器。

      解决方案:控制连接到直流电源1的三相主逆变器3,使得在相电压指令的半周期期间,将1脉冲的每个电压作为主电压脉冲输出,输出电压 控制与输出线37串联连接的两个逆变器5,从而向负载9提供三相AC,并且对主电压脉冲的反向上升定时和下降定时进行切换控制,并且控制用于在 副变换器5中的直流电容器53的电压和负载9的功率因数相同的方向。(C)2011,JPO&INPIT

    • 3. 发明专利
    • Power converter
    • 电源转换器
    • JP2011114964A
    • 2011-06-09
    • JP2009269774
    • 2009-11-27
    • Mitsubishi Electric Corp三菱電機株式会社
    • KAWAKAMI TOMOYUKIIZUMI KIKUOKUBOYAMA YUIWATA AKIHIKO
    • H02M3/155
    • PROBLEM TO BE SOLVED: To stably obtain a desired output voltage with respect to a wide-range input voltage while preventing an overcurrent from flowing in a power converter for executing DC/DC conversion. SOLUTION: A plurality of single-phase inverters 20a-20d are connected in series to the post stage of a DC power supply 1. The post stage is provided with a smoothing capacitor 6 connected via a rectifying diode 5 and a short-circuiting switch 4 for bypassing the smoothing capacitor 6. In a control circuit 7, a plurality of control modes comprise combinations of output control of each single-phase inverter 20a-20d and on/off control of the short-circuiting switch 4, the plurality of control modes are switched according to a voltage of the DC power supply 1, and a time ratio of drive signals 7a, 7b is adjusted on the basis of a deviation between an output voltage Vo and a command value, thereby allowing the output voltage Vo to moderately follow the command value. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:为了稳定地获得相对于宽范围输入电压的期望的输出电压,同时防止在用于执行DC / DC转换的功率转换器中的过电流流动。 解决方案:多个单相逆变器20a-20d串联连接到直流电源1的后级。后级设有平滑电容器6,该平滑电容器6通过整流二极管5和短路 在控制电路7中,多个控制模式包括每个单相逆变器20a-20d的输出控制和短路开关4的接通/断开控制的组合,多个 根据直流电源1的电压切换控制模式,并且基于输出电压Vo与指令值之间的偏差来调节驱动信号7a,7b的时间比,从而允许输出电压Vo 适度地遵循命令值。 版权所有(C)2011,JPO&INPIT
    • 4. 发明专利
    • パワーコンディショナシステム
    • 电力调节器系统
    • JP2014239624A
    • 2014-12-18
    • JP2013121879
    • 2013-06-10
    • 三菱電機株式会社Mitsubishi Electric Corp
    • KUBOYAMA YUTSUCHIMOTO NAOHIDEKASUGAI MAKOTO
    • H02J3/38H02M7/48
    • 【課題】自立運転時にパワーコンディショナの筐体に電圧がかかることを防止可能なパワーコンディショナシステムを得ること。【解決手段】系統7と連系して負荷9に電力を供給するパワーコンディショナシステムであって、直流電力を交流電力に変換し、系統7が電力供給中の系統連系時および系統7が電力供給停止中の自立運転時において、出力端子13から交流電力を出力するパワーコンディショナ2と、負荷9に対してパワーコンディショナ2と並列に接続可能であって、一次側電圧の入力を前記交流電力の電圧とし、二次側電圧として交流電力の電圧を分圧して出力し、一次側と二次側を絶縁せず、二次側の中性点を接地する単巻変圧器21と、を備え、単巻変圧器21の二次側の中性点、および単巻変圧器21を収納する筐体を、それぞれ個別に外部からの接地線と接続する。【選択図】図6
    • 要解决的问题:提供一种功率调节器系统,其能够防止在自维持操作期间将电压施加到功率调节器的壳体。解决方案:用于向与负载9互连的负载9供电的功率调节器系统 系统7包括:功率调节器2,其将直流电力转换为交流电力,并且在系统7供电的系统互连期间和系统7停止供电的自维持运行期间,从输出端输出交流电力 终端13; 以及能够与功率调节器2并联连接到负载9的自耦变压器21,接收作为一次电压输入的AC电力的电压,将AC电力的电压分压以输出次级电压,具有初级侧和 次级侧不隔离,并具有二次中性点接地。 自耦变压器21的二次中性点和存储自耦变压器21的壳体分别独立地连接到外部接地导体。
    • 5. 发明专利
    • Dc/dc power conversion device
    • DC / DC电源转换器件
    • JP2012120336A
    • 2012-06-21
    • JP2010268268
    • 2010-12-01
    • Mitsubishi Electric Corp三菱電機株式会社
    • KUBOYAMA YUIZUMI KIKUO
    • H02M3/155
    • PROBLEM TO BE SOLVED: To provide a DC/DC power conversion device that can reduce average power consumption over a wide range of DC voltage ratio.SOLUTION: The DC/DC power conversion device includes: a first capacitor 14 connected in parallel with a switch element series of first and second switch elements Q1, Q2 connected in series to control a current between input terminals, and holding a divided voltage between output terminals; a second capacitor 11 connected between the output terminals; a third capacitor 16 connected between a connection point between the first switch element Q1 and the second switch element Q2 and a connection point between first and second rectifying elements Q3, Q4 connected in parallel with the switch element series via the output terminals; and a control circuit for detecting voltages of the first capacitor 14, second capacitor 11 and third capacitor 16 and, if the voltage relationship satisfies a predetermined condition, limiting a lower limit of a duty factor of the first and second switch elements Q1, Q2 to 0.5.
    • 要解决的问题:提供可以在宽的直流电压比范围内降低平均功耗的DC / DC电力转换装置。 解决方案:DC / DC电力转换装置包括:与串联连接的第一和第二开关元件Q1,Q2的开关元件串联并联的第一电容器14,以控制输入端子之间的电流,并且保持分开的 输出端子之间的电压; 连接在输出端子之间的第二电容器11; 连接在第一开关元件Q1和第二开关元件Q2之间的连接点之间的第三电容器16以及经由输出端子与开关元件串并联连接的第一和第二整流元件Q3,Q4之间的连接点; 以及用于检测第一电容器14,第二电容器11和第三电容器16的电压的控制电路,并且如果电压关系满足预定条件,则将第一和第二开关元件Q1,Q2的占空因数的下限限制为 0.5。 版权所有(C)2012,JPO&INPIT
    • 6. 发明专利
    • Power conversion device and power conversion system
    • 电力转换装置和电力转换系统
    • JP2014023261A
    • 2014-02-03
    • JP2012158919
    • 2012-07-17
    • Mitsubishi Electric Corp三菱電機株式会社
    • KUBOYAMA YUIZUMI KIKUOOKUDA TATSUYA
    • H02M7/48H02M7/493
    • PROBLEM TO BE SOLVED: To obtain a power conversion device and a power conversion system which, in a configuration where a plurality of power conversion devices are operated in parallel to supply power to a common load, can reduce the possibility that when the load changes suddenly, power flows into the other power conversion devices and those power conversion devices are stopped by their overvoltage protective function, thus making it possible to improve the quality of power supplied to the load.SOLUTION: A power conversion device comprises: a DC voltage control circuit 211 which controls other power conversion devices 10 operated in parallel so that a voltage across their DC voltage smoothing capacitor 103 drops to or below a prescribed voltage value; an output limiting circuit 212 which limits an output current directive by output of the DC voltage control circuit 211; and a drive control unit 200 which controls the operation of an inverter 202 so as to limit its output power according to output of the output limiting circuit 212.
    • 要解决的问题:为了获得电力转换装置和电力转换系统,其在多个电力转换装置并联运行以向公共负载供电的结构中可以减少当负载突然变化时的可能性 ,电力流入其他电力转换装置,并且这些电力转换装置通过其过电压保护功能停止,从而可以提高提供给负载的电力的质量。解决方案:一种电力转换装置包括:直流电压控制电路 211,其控制并联运行的其他电力转换装置10,使得其直流电压平滑电容器103两端的电压下降到或低于规定的电压值; 输出限制电路212,其通过直流电压控制电路211的输出限制输出电流指令; 以及驱动控制单元200,其控制反相器202的操作,以便根据输出限制电路212的输出来限制其输出功率。
    • 7. 发明专利
    • Power conversion apparatus
    • 功率转换装置
    • JP2011142740A
    • 2011-07-21
    • JP2010001920
    • 2010-01-07
    • Mitsubishi Electric Corp三菱電機株式会社
    • KUBOYAMA YUIZUMI KIKUOIWATA AKIHIKO
    • H02M7/48H02M7/483
    • PROBLEM TO BE SOLVED: To initially charge a single-phase inverter with a rush current suppressed without equipping a dedicated initial charge circuit in a gradient control inverter obtained by connecting a single-phase inverter in series with each phase of a three-phase inverter. SOLUTION: A gradient control power conversion apparatus is obtained by connecting a single-phase inverter in series with each phase of AC output line of a three-phase, three-level inverter. The three-phase, three-level inverter 10 outputs a pulse voltage to charge the DC capacitor 25 of each single-phase inverter with an output current flowing through single-phase inverters 20A, 20B and an output filter 5. The pulse width and pulse period of the pulse voltage output by the three-phase, three-level inverter are so controlled that the output current does not become an overcurrent. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:为了对在没有装备专用初始充电电路的冲击电流进行初始充电的单相逆变器中,通过将单相逆变器与三相逆变器的每相串联连接而获得的梯度控制逆变器中, 相逆变器。 解决方案:通过将单相逆变器与三相三电平逆变器的交流输出线的每相串联连接,获得梯度控制电力转换装置。 三相三电平逆变器10输出脉冲电压,以流过单相逆变器20A,20B和输出滤波器5的输出电流对每个单相逆变器的直流电容器25充电。脉冲宽度和脉冲 由三相三电平逆变器输出的脉冲电压的周期被控制,使得输出电流不会变成过电流。 版权所有(C)2011,JPO&INPIT
    • 8. 发明专利
    • 電力変換装置
    • 功率转换装置
    • JP2015006029A
    • 2015-01-08
    • JP2013128548
    • 2013-06-19
    • 三菱電機株式会社Mitsubishi Electric Corp
    • KUBOYAMA YUTSUCHIMOTO NAOHIDEKASUGAI MAKOTO
    • H02M7/493H02M7/48
    • 【課題】負荷に供給する電力品質を向上することが可能な電力変換装置を得ること。【解決手段】負荷3と電源1の間に配され、出力端からの流入電力に対する保護機能を備える電力変換部10と、負荷3と電源2の間に配され、第1の電力変換部10と並列運転する第2の電力変換部20と、を備える電力変換装置が、電源1から第1の電力変換部10への出力端からの流入電力を検出して検出信号を出力する検出部40と、検出信号が入力される出力部(遮断信号生成部50)と、を備え、出力部に検出信号が入力されると、出力部が電源2と負荷3の間の電力経路を遮断する。【選択図】図1
    • 要解决的问题:提供一种能够改善提供给负载的电力质量的电力转换装置。解决方案:电力转换装置,包括设置在负载3和电源1之间并具有保护的电力转换部分10 功能10防止来自输出端子的流入动力,以及设置在负载3和电源2之间并与第一电力转换部10并联操作的第二电力转换部20还包括检测部40,其检测流入 从电源1通向第一电力转换部10的输出端子输出功率,输出检测信号,输入检测信号的输出部(截止信号生成部50)。 当检测信号输入到输出部分时,输出部分阻断电源2和负载3之间的电力路径。
    • 9. 发明专利
    • Power Conditioner system
    • 电力调节器系统
    • JP2014023256A
    • 2014-02-03
    • JP2012158771
    • 2012-07-17
    • Mitsubishi Electric Corp三菱電機株式会社
    • KASUGAI MAKOTOTSUCHIMOTO NAOHIDEOKUDA TATSUYAIZUMI KIKUOKUBOYAMA YU
    • H02J3/38H02J3/00H02J9/00H02M7/48
    • PROBLEM TO BE SOLVED: To provide a power conditioner system which can supply electric power having a plurality of voltages when a power failure occurs to a system and also can continuously supply electric power to a load in use when the system is associated.SOLUTION: A power conditioner system includes a power conditioner 2 which converts DC electric power into AC electric power and outputs the AC electric power from an output terminal 13 in system association and independent operation; and an autotransformer 21 which can be connected to a load 9 in parallel with the power conditioner 2, receive the voltage of the AC electric power as an input of a primary-side voltage, divides and outputs the voltage of the AC electric power as a secondary-side voltage, and the primary side and secondary side being not insulated. The power conditioner 2 includes a control part 12 which performs control to monitor the power supply state of a system 7, to make a connection with the system 7 and break a connection with the autotransformer 21 during electric power supply of the system 7, and to break the connection with the system 7 and connect the autotransformer 21 and output terminal 13 to each other when detecting a stop of the electric power supply of the system 7.
    • 要解决的问题:提供一种功率调节器系统,其能够在系统发生电力故障时提供具有多个电压的电力,并且还可以在系统相关联时向使用中的负载持续供电。解决方案:A 功率调节器系统包括功率调节器2,其将直流电功率转换为交流电力,并在系统关联和独立运行中从输出端子13输出交流电; 以及能够与功率调节器2并联连接到负载9的自耦变压器21,接收作为初级侧电压的输入的交流电力的电压,并将交流电的电压作为 次级侧电压,初级侧和次级侧不被绝缘。 功率调节器2包括控制部12,其执行控制以监视系统7的电源状态,以在系统7的电力供应期间与系统7建立连接并断开与自耦变压器21的连接,并且 断开与系统7的连接,并且当检测到系统7的电力供应的停止时,将自耦变压器21和输出端子13彼此连接。
    • 10. 发明专利
    • Power conversion apparatus
    • 功率转换装置
    • JP2013093982A
    • 2013-05-16
    • JP2011234749
    • 2011-10-26
    • Mitsubishi Electric Corp三菱電機株式会社
    • KUBOYAMA YU
    • H02J3/16H02J3/38H02M7/48
    • Y02E40/34
    • PROBLEM TO BE SOLVED: To obtain a power conversion apparatus in which effects of suppressing voltage fluctuation in an AC system can be utilized effectively at a maximum by reducing the limiting amount of an invalid power command value as further as possible when limiting a valid power command value and the invalid power command value which are given, while considering an operable range specified to the power conversion apparatus.SOLUTION: A power conversion apparatus comprises an output limit circuit 9 constituted of a Q limiter 1 and P limiters 1 and 2. The Q limiter 1 outputs an invalid power command limit value Qref* by limiting an invalid power command value Qref in such a manner that the absolute value thereof becomes maximum within an operable range and the range of a valid power command value Pref. The P limiter 1, 2 outputs a valid power command limit value Pref* by limiting Pref in such a manner that its value becomes maximum within the operable range and the range of Qref*.
    • 解决的问题:为了获得能够通过尽可能地减少无效功率指令值的限制量来最大限度地利用有效地抑制AC系统中的电压波动的效果的功率转换装置, 同时考虑对电力转换装置指定的可操作范围,给出给定的有效功率指令值和无效功率指令值。 解决方案:功率转换装置包括由Q限制器1和P限制器1和2构成的输出限制电路9.Q限制器1通过限制无效功率命令值Qref输出无效功率命令限制值Qref * 使其绝对值在可操作范围内的最大值和有效功率指令值Pref的范围内。 P限制器1,2通过限制Pref以其可操作范围和Qref *的范围内的值变为最大的方式输出有效的功率命令限制值Pref *。 版权所有(C)2013,JPO&INPIT