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    • 1. 发明专利
    • Power conversion device
    • 电源转换器件
    • JP2013172615A
    • 2013-09-02
    • JP2012036592
    • 2012-02-22
    • Daikin Ind Ltdダイキン工業株式会社
    • TOOYAMA EIJISEKIMOTO MORIMITSUTANIGUCHI TOMOOHIBINO HIROSHI
    • H02P27/06H02P27/16
    • PROBLEM TO BE SOLVED: To switch a relay without breaking, for example, constitute elements of a capacitor-less inverter circuit.SOLUTION: A power conversion device (10) includes: a diode rectifier circuit (20) rectifying an AC power outputted from an AC power supply (1); a relay (14) switching an input side of the diode rectifier circuit (20) to an on-state and an off-state; an inverter circuit (30) receiving power from the diode rectifier circuit (20); a capacitor (26) absorbing voltage fluctuation by switching of the inverter circuit (30) without absorbing voltage fluctuation from the diode rectifier circuit (20); a voltage detection circuit (42) detecting a voltage applied to the diode rectifier circuit (20) from the AC power supply (1); and a relay control section (41) switching the relay (14) from the off-state to the on-state when the detection voltage of the voltage detection circuit (42) is less than or equal to a reference voltage.
    • 要解决的问题:例如,为了不断路而切换继电器,构成无电容逆变电路的要素。电力转换装置(10)具备:二极管整流电路(20),对从 交流电源(1); 将所述二极管整流电路(20)的输入侧切换为导通状态和截止状态的继电器(14) 从二极管整流电路(20)接收电力的逆变器电路(30); 电容器(26),其通过切换所述逆变器电路(30)来吸收电压波动,而不从所述二极管整流电路(20)吸收电压波动; 电压检测电路(42),从所述AC电源(1)检测施加到所述二极管整流电路(20)的电压; 以及当所述电压检测电路(42)的检测电压小于或等于参考电压时,将所述继电器(14)从截止状态切换到导通状态的继电器控制部(41)。
    • 2. 发明专利
    • Power converter
    • 电源转换器
    • JP2012165634A
    • 2012-08-30
    • JP2012007993
    • 2012-01-18
    • Daikin Ind Ltdダイキン工業株式会社
    • TOOYAMA EIJISEKIMOTO MORIMITSUMAEDA TOSHIYUKI
    • H02P27/06H02M5/297H02M7/48
    • H02P23/0095H02M1/12H02P21/05H02P29/50
    • PROBLEM TO BE SOLVED: To reduce a power supply harmonic wave caused by motor voltage distortion according to a motor operating state.SOLUTION: A power converter, including switching elements (Su, Sv, Sw, Sx, Sy, Sz), converts input AC power supplied from an AC power supply (6) to output AC power with predetermined voltage and frequency and supplies the power to a connected motor (7). The power converter includes: a control section (5) for controlling switching operations of switching elements (Su, Sv, Sw, Sx, Sy, Sz); a capacitor (3a) for smoothing ripple generated by switching the switching elements (Su, Sv, Sw, Sx, Sy, Sz); a current control section (53) for controlling an electric current running through the motor (7); and a voltage distortion compensation section (54) for detecting a harmonic wave component caused by motor power distortion and superimposing a compensation value (vd_h, vq_h) on an output of the current control section (53) according to a value of the harmonic wave component.
    • 要解决的问题:根据电机工作状态减少由电机电压失真引起的电源谐波。 解决方案:包括开关元件(Su,Sv,Sw,Sx,Sy,Sz)的电源转换器将从交流电源(6)提供的输入交流电转换为输出具有预定电压和频率的交流电源 连接电机的电源(7)。 功率转换器包括:用于控制开关元件(Su,Sv,Sw,Sx,Sy,Sz)的开关操作的控制部分(5); 用于平滑通过切换开关元件(Su,Sv,Sw,Sx,Sy,Sz)产生的纹波的电容器(3a); 用于控制通过电动机(7)的电流的电流控制部(53); 以及电压失真补偿部(54),用于检测由电机功率失真引起的谐波分量,并根据谐波分量的值将补偿值(vd_h,vq_h)叠加在电流控制部(53)的输出上 。 版权所有(C)2012,JPO&INPIT
    • 4. 发明专利
    • Power conversion device
    • 电源转换器件
    • JP2012151976A
    • 2012-08-09
    • JP2011008027
    • 2011-01-18
    • Daikin Ind Ltdダイキン工業株式会社
    • TOOYAMA EIJISEKIMOTO MORIMITSUTANIGUCHI TOMOOOGAWA TAKURO
    • H02M7/48
    • PROBLEM TO BE SOLVED: To provide a power conversion device that handles noise.SOLUTION: The power conversion device (10) having a rectifying circuit (11), a DC link section (12) having a capacitor (14) and outputting a pulsating DC voltage, and an inverter circuit (13) includes: a detection circuit (20) for detecting an output voltage (Vdc) of the DC link section (12) or an output current (iin) of the rectifying circuit (11) per carrier of a switching signal; a prediction section (31) for predicting a detection value of the present carrier according to detection values of the preceding and earlier carriers used in a control section (30); and a decision section (32) for deciding the detection value of the present carrier to be used in the control section (30) according to the detection value predicted by the prediction section (31) and the detection value of the present carrier detected by the detection circuit (20).
    • 要解决的问题:提供一种处理噪声的电力转换装置。 解决方案:具有整流电路(11)的电力转换装置(10),具有电容器(14)并输出脉动直流电压的直流链路部分(12)和逆变器电路(13)包括: 检测电路(20),用于检测直流链路部分(12)的输出电压(Vdc)或整流电路(11)的每个载波的开关信号的输出电流(iin); 用于根据在控制部分(30)中使用的先前和较早载波的检测值来预测当前载波的检测值的预测部分(31)。 以及判定部(32),用于根据由预测部(31)预测的检测值和由该预测部(31)预测的当前载波的检测值,决定控制部(30)中要使用的当前载波的检测值 检测电路(20)。 版权所有(C)2012,JPO&INPIT
    • 5. 发明专利
    • Power conversion device
    • 电源转换器件
    • JP2012151974A
    • 2012-08-09
    • JP2011007993
    • 2011-01-18
    • Daikin Ind Ltdダイキン工業株式会社
    • TOOYAMA EIJISEKIMOTO MORIMITSUTANIGUCHI TOMOOOGAWA TAKURO
    • H02M7/48
    • PROBLEM TO BE SOLVED: To provide a power conversion device that prevents a wrong stop due to wrong voltage detection.SOLUTION: The power conversion device (10) having a converter circuit (11), a DC link section (12) having a capacitor (14) connected in parallel with an output of the converter circuit (11) and outputting a pulsating DC voltage, and an inverter circuit (13) includes: a voltage detection section (21) for detecting a DC voltage (Vdc) of the DC link section (12) at least once per carrier of a switching signal; a determination section (41) for determining whether or not the DC voltage (Vdc) is an overvoltage according to a plurality of detection values; and a stop section (42) for stopping the inverter circuit (13) if the determination section (41) determines that the DC voltage (Vdc) is an overvoltage.
    • 要解决的问题:提供一种防止由于错误的电压检测而导致的错误停止的电力转换装置。 解决方案:具有转换器电路(11)的电力转换装置(10),具有与转换器电路(11)的输出并联连接的电容器(14)的直流链路部分(12),并输出脉动 直流电压和逆变器电路(13)包括:电压检测部(21),用于至少每次开关信号的载波检测直流链路部(12)的直流电压(Vdc) 确定部分,用于根据多个检测值确定DC电压(Vdc)是否是过电压; 以及如果确定部分(41)确定DC电压(Vdc)是过电压,则用于停止逆变器电路(13)的停止部分(42)。 版权所有(C)2012,JPO&INPIT
    • 6. 发明专利
    • Power conversion device
    • 电源转换器件
    • JP2012151973A
    • 2012-08-09
    • JP2011007991
    • 2011-01-18
    • Daikin Ind Ltdダイキン工業株式会社
    • TANIGUCHI TOMOOSEKIMOTO MORIMITSUOGAWA TAKUROTOOYAMA EIJI
    • H02M7/48H02M1/00H02M7/12
    • PROBLEM TO BE SOLVED: To precisely detect currents flowing through a converter circuit and an inverter circuit.SOLUTION: A converter side shunt resistor (17) and an inverter side shunt resistor (18) are connected in a DC link (13). Potential differences across the converter side shut resistor (17) and the inverter side shunt resistor (18) are output by amplification in a converter side amplification circuit (21) and an inverter side amplification circuit (22). An offset current (30) is connected to the converter side amplification circuit (21). The offset circuit (30) has a resistive voltage dividing circuit (31) and a voltage follower circuit (32).
    • 要解决的问题:精确检测流过转换器电路和逆变器电路的电流。 解决方案:转换器侧分流电阻(17)和反相器侧分流电阻(18)连接在直流母线(13)中。 在转换器侧放大电路(21)和反相器侧放大电路(22)中通过放大来输出转换器侧关闭电阻器(17)和反相器侧分流电阻器(18)之间的电位差。 偏移电流(30)连接到转换器侧放大电路(21)。 偏移电路(30)具有电阻分压电路(31)和电压跟随器电路(32)。 版权所有(C)2012,JPO&INPIT
    • 8. 发明专利
    • Motor drive device
    • 电机驱动装置
    • JP2012151965A
    • 2012-08-09
    • JP2011007842
    • 2011-01-18
    • Daikin Ind Ltdダイキン工業株式会社
    • TANIGUCHI TOMOOSEKIMOTO MORIMITSUOGAWA TAKUROTOOYAMA EIJI
    • H02P6/18
    • PROBLEM TO BE SOLVED: To accurately discriminate the polarity of a permanent magnet field.SOLUTION: A motor drive device (10) includes an AC power source (11), a converter part (20), a capacitor (31), a DC link part (30) for outputting a pulsating DC, an inverter part (40) and a permanent magnet motor (12). The motor drive device (10) includes: a voltage command part (51) for outputting a voltage command to the inverter part (40) so as to output a pulse voltage to the permanent magnet motor (12) for two or more times at an interval of the integral multiple of a half period of a power supply voltage of the AC power source (11) and at timing corresponding to the second half of the half period; and a discrimination part (52) for detecting a motor current of the permanent magnet motor (12) and discriminating the polarity of the permanent magnet motor (12) on the basis of the magnitude of the variation of the motor current by the pulse voltage.
    • 要解决的问题:准确地区分永久磁场的极性。 电动机驱动装置(10)包括交流电源(11),转换器部分(20),电容器(31),用于输出脉动DC的直流链路部分(30),逆变器部分 (40)和永磁电动机(12)。 电机驱动装置(10)包括:电压指令部(51),用于向逆变器部(40)输出电压指令,以便在永久磁铁电动机(12)中输出脉冲电压两次以上 交流电源(11)的电源电压的半周期的整数倍的间隔和对应于半周期的后半期的定时; 以及用于检测永磁电动机(12)的电动机电流并且基于电动机电流的变化幅度由脉冲电压来鉴别永磁电动机(12)的极性的判别部分(52)。 版权所有(C)2012,JPO&INPIT
    • 9. 发明专利
    • Power conversion apparatus
    • 功率转换装置
    • JP2011200089A
    • 2011-10-06
    • JP2010067390
    • 2010-03-24
    • Daikin Industries Ltdダイキン工業株式会社
    • HIBINO HIROSHISEKIMOTO MORIMITSUTANIGUCHI TOMOOTOOYAMA EIJI
    • H02M7/48H02M5/297H02P27/06
    • PROBLEM TO BE SOLVED: To provide a structure that can avoid destruction of constituent devices by an inexpensive configuration even if the driving of a conversion unit is stopped, concerning a power conversion apparatus with the conversion unit for supplying power to an inductive load.SOLUTION: The power conversion apparatus includes: a current determiner (16) for determining whether a current in a motor (3) is the same as or smaller than a predetermined value in stopping the supply of power to the motor (3); and a switching control unit (15) that makes switching elements (Su, Sv, Sw, Sx, Sy, Sz) continue a switching operation until the current in the motor (3) is determined to be the same as or smaller than the predetermined value by the current determiner (16).
    • 要解决的问题:提供一种结构,即使在转换单元的驱动停止时也可以通过廉价的配置来避免构成装置的破坏,涉及具有用于向感性负载供电的转换单元的电力转换装置。解决方案: 电力转换装置包括:电流确定器(16),用于在停止对电动机(3)的供电时,确定电动机(3)中的电流是否等于或小于预定值; 以及使得开关元件(Su,Sv,Sw,Sx,Sy,Sz)继续进行切换操作的开关控制单元(15),直到电动机(3)中的电流被确定为等于或小于预定值 值由电流确定器(16)计算。