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1. 发明公开

EP2068099A2 Refrigeration cycle system, natural gas liquefaction plant, heat pump system, and method for retrofitting refrigeration cycle system 审中-公开
标题翻译：制冷循环系统，天然气液化设备，热泵系统和方法用于改装制冷循环系统
公开(公告)号：EP2068099A2
公开(公告)日：2009-06-10
申请号：EP08020972.9
申请日：2008-12-03
申请人： Hitachi Ltd. , Hitachi Plant Technologies, Ltd.
发明人： Shibata, Takanori , Bannai, Masaaki , Fukushima, Yasuo , Horitsugi, Mutsumi
IPC分类号： F25B1/10 , F25B5/00 , F25B5/02
CPC分类号： F25B1/10 , F25B5/00 , F25B5/02 , F25B31/006 , F25B2341/0662 , F25B2400/072 , F25B2400/13 , F25B2400/16 , F25B2400/23 , F25J1/0022 , F25J1/0052 , F25J1/0055 , F25J1/0087 , F25J1/0216 , F25J1/0268 , F25J1/0279 , F25J1/0296 , F25J2270/12 , F25J2270/60
摘要： A refrigeration cycle system is provided, comprising a plurality of compressors (3,4,5) for compressing a refrigerant that is used to cool a medium (10), one of the compressors being a low pressure compressor (3), another one of the compressors being a high pressure compressor (5); a condenser (6) for cooling and condensing the refrigerant compressed by the plurality of compressors (3,4,5); a reservoir (7) for receiving the refrigerant condensed by the condenser (6); an expansion mechanism (9) for expanding and cooling the refrigerant supplied from the reservoir (7); an evaporator (9) for evaporating the refrigerant cooled by the expansion mechanism (8) by means of the medium (10) to generate a refrigerant to be supplied to the plurality of compressors (3,4,5); and an intercooler (15,15A,61) that is provided between the low pressure compressor (3) and the high pressure compressor (5) and adapted to cool the refrigerant supplied from the low pressure compressor (3) by means of the refrigerant supplied from the expansion mechanism (8) so as to generate a refrigerant to be supplied to the high pressure compressor (5).
摘要翻译：的制冷循环系统被提供，其包括压缩机用于压缩制冷剂有多个（3,4,5）也被用于冷却介质（10），所述压缩机中的一个是一个低压压缩机（3），中的另一个压缩机是高压压缩机（5）; 用于冷却和冷凝由压缩机的多元性（3,4,5）压缩的制冷剂的冷凝器（6）; 用于接收由所述冷凝器（6）中冷凝的制冷剂的储存器（7）; 上膨胀机构（9），用于膨胀和冷却从储存器（7）供给的制冷剂; 到蒸发器（9），用于通过所述介质（10）的方式蒸发由膨胀机构（8）冷却的制冷剂，以产生制冷剂被供应到压缩机的多元性（3,4,5）; 和中间冷却器（15,15a，61）没被低压压缩机（3）和高压压缩机（5）和由angepasst供给的制冷剂来冷却从所述低压压缩机（3）供给的制冷剂之间提供从膨胀机构（8），以便产生将被供应到高压压缩机（5）的制冷剂。

2. 发明公开

EP0560234A2 Method and apparatus for controlling a magnetic bearing 失效
标题翻译： Verfahren undGerätzur Steuerung eines Magnetlagers。
公开(公告)号：EP0560234A2
公开(公告)日：1993-09-15
申请号：EP93103611.5
申请日：1993-03-05
申请人： HITACHI, LTD.
发明人： Matsushita, Osami , Yoneyama, Mitsuho , Takahashi, Naohiko , Fukushima, Yasuo , Hiroshima, Minoru , Kaneki, Tadashi , Abe, Yoshiaki , Sakanashi, Naofumi
IPC分类号： F16C39/06
CPC分类号： F16C32/0453 , F16C32/048
摘要： A controller of a magnetic bearing controls the rotor speed with a reduced drive current while suppressing rotor vibrations. In addition to the basic Proportional, Integral and Derivative (PID) control (4X,4Y), the controller implements further control methods to ensure the stable operation of the rotor, even at rotor resonance frequencies. An automatic balancing system ("ABS", gainβ) is applied in conjunction with at least one of: N-cross control system (cross coupling, synchronous with rotor speed, gainα); N-straight control (no cross-coupling, but synchronous, gainδ); Feed Forward (FF, gainγ) control where a control current is applied to generate vibrations equal and opposite to those created by the rotor. A computer (20) in the controller determines the activation of each control method in accordance with a predetermined control plan in response to the detected rotor speed by varying the control parameters α, β, γ, δ.
摘要翻译：磁轴承的控制器在抑制转子振动的同时以减小的驱动电流来控制转子速度。除了基本的比例，积分和微分（PID）控制（4X，4Y）之外，控制器还实现了进一步的控制方法，以确保转子的稳定运行，即使在转子谐振频率。自动平衡系统（“ABS”，增益β）与以下中的至少一个结合使用：交叉控制系统（交叉耦合，与转子速度同步，增益α）; N直线控制（无交叉耦合，但同步，增益增量）; 前馈（FF，增益伽马）控制，其中施加控制电流以产生与转子产生的振动相等和相反的振动。控制器（20）通过改变控制参数α，β，γ，δ来响应于检测到的转子速度，根据预定的控制计划确定每个控制方法的激活。

3. 发明公开

EP0631215A2 Magnetic bearing apparatus and rotating machine having such an apparatus 失效
标题翻译： Gerätund Drehmaschine mit einem Magnetlager。
公开(公告)号：EP0631215A2
公开(公告)日：1994-12-28
申请号：EP94107643.2
申请日：1994-05-17
申请人： HITACHI, LTD.
发明人： Takahashi, Naohiko , Hiroshima, Minoru , Matsushista, Osami , Fukushima, Yasuo
IPC分类号： G05D13/00
CPC分类号： F16C32/0451 , F16C32/0446 , F16C2360/44
摘要： A magnetic bearing is provided with a simulating circuit (10) for estimating a displacement of a rotor (1) on the basis of a force which is exerted on the rotor (1). An output of the simulating circuit (10) is compared with an actual displacement signal. A delay circuit (13) and a subtracter (21) are provided to subtract a run-out which was estimated one period before the rotation of the rotor from the displacement signal. A displacement signal from which the run-out component was eliminated is set to a new displacement signal. A signal which is obtained by adding an estimation run-out of one period before, namely, an output of the delay circuit to the run-out which was estimated by comparing the output of the simulating circuit (10) with the new displacement signal is newly inputted to the delay circuit (13). Due to this, the run-out component is eliminated from the displacement signal of the magnetic bearing, a load of power amplifiers (7a, 7b) for driving electromagnets (3a, 3b) is reduced, there is a surplus for a saturation which is caused in a high frequency band, the reliability of a control system is improved, and a deterioration of a positional accuracy which is caused by the run-out is prevented.
摘要翻译：磁轴承设置有用于基于施加在转子（1）上的力来估计转子（1）的位移的模拟电路（10）。模拟电路（10）的输出与实际位移信号进行比较。提供延迟电路（13）和减法器（21）以减去从位移信号转动之前一个周期估计的跳动。排除组分的位移信号被设定为新的位移信号。通过将延迟电路的输出与通过将模拟电路（10）的输出与新的位移信号进行比较而估计出的余量相加的一个周期的估计耗尽量相加得到的信号是新输入到延迟电路（13）。由此，从磁轴承的位移信号中消除了偏移分量，用于驱动电磁体（3a，3b）的功率放大器（7a，7b）的负载减小，饱和余量为在高频带中引起的控制系统的可靠性提高，并且防止由跳动引起的位置精度的劣化。

4. 发明公开

EP0560234A3 Method and apparatus for controlling a magnetic bearing 失效
标题翻译：用于控制磁性轴承的方法和装置
公开(公告)号：EP0560234A3
公开(公告)日：1993-12-01
申请号：EP93103611.5
申请日：1993-03-05
申请人： HITACHI, LTD.
发明人： Matsushita, Osami , Yoneyama, Mitsuho , Takahashi, Naohiko , Fukushima, Yasuo , Hiroshima, Minoru , Kaneki, Tadashi , Abe, Yoshiaki , Sakanashi, Naofumi
IPC分类号： F16C39/06
CPC分类号： F16C32/0453 , F16C32/048
摘要： A controller of a magnetic bearing controls the rotor speed with a reduced drive current while suppressing rotor vibrations. In addition to the basic Proportional, Integral and Derivative (PID) control (4X,4Y), the controller implements further control methods to ensure the stable operation of the rotor, even at rotor resonance frequencies. An automatic balancing system ("ABS", gainβ) is applied in conjunction with at least one of: N-cross control system (cross coupling, synchronous with rotor speed, gainα); N-straight control (no cross-coupling, but synchronous, gainδ); Feed Forward (FF, gainγ) control where a control current is applied to generate vibrations equal and opposite to those created by the rotor. A computer (20) in the controller determines the activation of each control method in accordance with a predetermined control plan in response to the detected rotor speed by varying the control parameters α, β, γ, δ.

5. 发明公开

EP2068099A3 Refrigeration cycle system, natural gas liquefaction plant, heat pump system, and method for retrofitting refrigeration cycle system 审中-公开
标题翻译：制冷循环系统，天然气液化设备，热泵系统和方法用于改装制冷循环系统
公开(公告)号：EP2068099A3
公开(公告)日：2012-02-15
申请号：EP08020972.9
申请日：2008-12-03
申请人： Hitachi Ltd. , Hitachi Plant Technologies, Ltd.
发明人： Shibata, Takanori , Bannai, Masaaki , Fukushima, Yasuo , Horitsugi, Mutsumi
IPC分类号： F25B1/10 , F25B5/00 , F25B31/00 , F25B5/02
CPC分类号： F25B1/10 , F25B5/00 , F25B5/02 , F25B31/006 , F25B2341/0662 , F25B2400/072 , F25B2400/13 , F25B2400/16 , F25B2400/23 , F25J1/0022 , F25J1/0052 , F25J1/0055 , F25J1/0087 , F25J1/0216 , F25J1/0268 , F25J1/0279 , F25J1/0296 , F25J2270/12 , F25J2270/60
摘要： A refrigeration cycle system is provided, comprising a plurality of compressors (3,4,5) for compressing a refrigerant that is used to cool a medium (10), one of the compressors being a low pressure compressor (3), another one of the compressors being a high pressure compressor (5); a condenser (6) for cooling and condensing the refrigerant compressed by the plurality of compressors (3,4,5); a reservoir (7) for receiving the refrigerant condensed by the condenser (6); an expansion mechanism (9) for expanding and cooling the refrigerant supplied from the reservoir (7); an evaporator (9) for evaporating the refrigerant cooled by the expansion mechanism (8) by means of the medium (10) to generate a refrigerant to be supplied to the plurality of compressors (3,4,5); and an intercooler (15,15A,61) that is provided between the low pressure compressor (3) and the high pressure compressor (5) and adapted to cool the refrigerant supplied from the low pressure compressor (3) by means of the refrigerant supplied from the expansion mechanism (8) so as to generate a refrigerant to be supplied to the high pressure compressor (5).

6. 发明授权

EP0631215B1 Magnetic bearing apparatus and rotating machine having such an apparatus 失效
标题翻译：磁性轴承和旋转机械具有磁轴承
公开(公告)号：EP0631215B1
公开(公告)日：2000-08-30
申请号：EP94107643.2
申请日：1994-05-17
申请人： HITACHI, LTD.
发明人： Takahashi, Naohiko , Hiroshima, Minoru , Matsushista, Osami , Fukushima, Yasuo
IPC分类号： G05D13/00
CPC分类号： F16C32/0451 , F16C32/0446 , F16C2360/44

7. 发明授权

EP0560234B1 Method and apparatus for controlling a magnetic bearing 失效
标题翻译：用于控制磁性轴承的方法和装置
公开(公告)号：EP0560234B1
公开(公告)日：1998-06-10
申请号：EP93103611.5
申请日：1993-03-05
申请人： HITACHI, LTD.
发明人： Matsushita, Osami , Yoneyama, Mitsuho , Takahashi, Naohiko , Fukushima, Yasuo , Hiroshima, Minoru , Kaneki, Tadashi , Abe, Yoshiaki , Sakanashi, Naofumi
IPC分类号： F16C39/06
CPC分类号： F16C32/0453 , F16C32/048

8. 发明公开

EP0631215A3 Magnetic bearing apparatus and rotating machine having such an apparatus 失效
标题翻译：机床和车床用磁轴承。
公开(公告)号：EP0631215A3
公开(公告)日：1995-02-08
申请号：EP94107643.2
申请日：1994-05-17
申请人： HITACHI, LTD.
发明人： Takahashi, Naohiko , Hiroshima, Minoru , Matsushista, Osami , Fukushima, Yasuo
IPC分类号： G05D13/00
CPC分类号： F16C32/0451 , F16C32/0446 , F16C2360/44
摘要： A magnetic bearing is provided with a simulating circuit (10) for estimating a displacement of a rotor (1) on the basis of a force which is exerted on the rotor (1). An output of the simulating circuit (10) is compared with an actual displacement signal. A delay circuit (13) and a subtracter (21) are provided to subtract a run-out which was estimated one period before the rotation of the rotor from the displacement signal. A displacement signal from which the run-out component was eliminated is set to a new displacement signal. A signal which is obtained by adding an estimation run-out of one period before, namely, an output of the delay circuit to the run-out which was estimated by comparing the output of the simulating circuit (10) with the new displacement signal is newly inputted to the delay circuit (13). Due to this, the run-out component is eliminated from the displacement signal of the magnetic bearing, a load of power amplifiers (7a, 7b) for driving electromagnets (3a, 3b) is reduced, there is a surplus for a saturation which is caused in a high frequency band, the reliability of a control system is improved, and a deterioration of a positional accuracy which is caused by the run-out is prevented.

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