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公开(公告)号：US4698581A
公开(公告)日：1987-10-06
申请号：US903957
申请日：1986-09-05
CPC分类号： H02J3/1864 , Y02E40/12
摘要： In a reactive power compensation apparatus for compensating reactive power generated by a load connected to an AC power supply system, dual phase current signals obtained by dual phase-converting the load currents and unit dual phase voltage signals synchronized with voltages of an AC main line connected to the load are used, and arithmetic operations thereof are performed to separately detect an in-phase reactive component signal and opposite phase component signals of the load currents. Current commands are generated on the basis of the separately detected signals, thereby controlling the reactive power compensation apparatus on the basis of the current commands.
摘要翻译： 在用于补偿由连接到AC电源系统的负载产生的无功功率的无功功率补偿装置中，通过双相转换负载电流和单元双相电压信号获得的双相电流信号与连接的AC主线的电压同步 使用负载，并且执行其算术运算以分别检测负载电流的同相无功分量信号和相反相位分量信号。 基于单独检测的信号产生电流指令，从而根据当前命令控制无功补偿装置。
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公开(公告)号：US4652989A
公开(公告)日：1987-03-24
申请号：US770071
申请日：1985-08-28
申请人： Ryoichi Kurosawa , Takeo Shimamura
发明人： Ryoichi Kurosawa , Takeo Shimamura
CPC分类号： H02M5/273
摘要： A frequency converter apparatus is provided with a frequency converter coupled to an AC power supply and to a load. The frequency converter converts an AC input with a given input frequency into an AC output with a given output frequency. The frequency converter apparatus is further provided with a frequency reference circuit and a harmonic cancel circuit. The frequency reference circuit supplies a reference signal to the frequency converter so that the output frequency of the AC output follows the reference signal. The harmonic cancel circuit supplies a harmonic cancelling signal to the frequency reference circuit so that the prescribed order of the higher harmonic of the AC output is substantially cancelled according to the frequency, magnitude and phase of the harmonic cancelling signal.
摘要翻译： 变频器装置具有耦合到AC电源和负载的变频器。 变频器将具有给定输入频率的交流输入转换为具有给定输出频率的交流输出。 变频器装置还具有频率参考电路和谐波消除电路。 频率参考电路向变频器提供参考信号，使得AC输出的输出频率遵循参考信号。 谐波消除电路向频率参考电路提供谐波消除信号，使得根据谐波消除信号的频率，幅度和相位基本上消除AC输出的高次谐波的规定次序。
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公开(公告)号：US4755738A
公开(公告)日：1988-07-05
申请号：US91666
申请日：1987-09-01
CPC分类号： H02J3/1864 , Y02E40/12
摘要： A reactive power compensation apparatus for compensating for voltage fluctuation of an AC power supply system includes a first arithmetic circuit for synthesizing a positive-phase fundamental wave voltage signal from voltages of the AC power supply system, a second arithmetic circuit for synthesizing negative-phase voltage signals from the voltages of the AC power supply system, a third arithmetic circuit, coupled to the first and second arithmetic circuits, for synthesizing current instructions from the positive-phase fundamental wave voltage and the negative-phase voltage signals, and a circuit, coupled to the third arithmetic circuit, for generating a reactive power corresponding to the current instructions.
摘要翻译： 用于补偿交流电源系统的电压波动的无功补偿装置包括：第一运算电路，用于从交流电源系统的电压合成正相基波电压信号;第二运算电路，用于合成负相电压 来自交流电源系统的电压的信号，耦合到第一和第二运算电路的第三运算电路，用于从正相基波电压和负相电压信号合成电流指令，以及耦合 到第三运算电路，用于产生与当前指令相对应的无功功率。
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公开(公告)号：US4032831A
公开(公告)日：1977-06-28
申请号：US635156
申请日：1975-11-24
CPC分类号： H02M7/515
摘要： In an inverter apparatus including a plurality of parallel branch circuits connected across a D.C. source, each including a pair of serially connected controllable switching elements, and a plurality of semiconductor elements connected in parallel opposition with respective switching elements, a D.C. reactor is connected on the D.C. side or A.C. side of the inverter and a circuit is connected across the D.C. reactor for preventing attenuation of the current flowing through the D.C. reactor during the OFF period of the switching elements. A source of control pulses is provided for rendering ON respective controllable switching elements each for a 120.degree. interval of the output alternating current. The source of control pulse includes means for chopping the current flowing through each controllable switching element at a predetermined modulation frequency for the former or latter 60.degree. of the 120.degree. interval.
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公开(公告)号：US4555755A
公开(公告)日：1985-11-26
申请号：US589998
申请日：1984-03-15
申请人： Ryoichi Kurosawa , Takeo Shimamura
发明人： Ryoichi Kurosawa , Takeo Shimamura
摘要： In an AC current control system for controlling multi-phase AC currents supplied from a power converter to a load, the currents are detected and coordinate-transformed into orthogonal two-axis current values i.sub.d, i.sub.q in a rotating coordinate rotating at an angular frequency .omega., and then compared with the references. The deviations are used to determine two-axis voltage values e.sub.d *, e.sub.q *, which are coordinate-transformed into multi-phase voltage values determining the output voltages of the power converter. The system is characterized in that the voltage value e.sub.d * is determined not only from .DELTA.i.sub.d but also from the product of .omega. and .DELTA.i.sub.q, while the voltage value e.sub.q * is determined not only from .DELTA.i.sub.q but also from the product of .omega. and .DELTA.i.sub.d. This arrangement makes it possible to provide a voltage component corresponding to the voltage drop across the inductive component of the load which is 90.degree. in advance of the current.
摘要翻译： 在用于控制从功率转换器提供给负载的多相AC电流的交流电流控制系统中，检测电流，并以旋转的坐标转换成正交的两轴电流值id，iq，旋转坐标以角频率ω ，然后与参考文献进行比较。 这些偏差用于确定两轴电压值ed *，eq *，它们被坐标转换为确定功率转换器的输出电压的多相电压值。 该系统的特征在于，电压值ed *不仅来自DELTA id，而且还由ω和ΔTAiq的乘积确定，而电压值eq *不仅来自DELTA iq，而且还由Ω和 DELTA ID。 这种布置使得可以提供与电流之前90度的负载的电感分量两端的电压降相对应的电压分量。
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公开(公告)号：US5446363A
公开(公告)日：1995-08-29
申请号：US109501
申请日：1993-08-20
申请人： Ryoichi Kurosawa , Hajime Yamamoto
发明人： Ryoichi Kurosawa , Hajime Yamamoto
CPC分类号： H02P21/09 , H02P2207/01
摘要： There is disclosed a method of controlling an induction motor, which controls a primary current of the induction motor on the basis of a magnetic flux component current command i.sub.1d *, a torque component current command i.sub.1q *, and a slip frequency command .omega..sub.s which are orthogonal component command values of the primary current of the induction motor, wherein control parameters R.sub.2 *, l.sub.2 * and M* set in accordance with a secondary resistance R.sub.2, a secondary leakage inductance l.sub.2 and a mutual inductance M of the induction motor are used to calculate the magnetic flux component current command i.sub.1d *, the torque component current command i.sub.1q * and the slip frequency command .omega..sub.s. Even in the case where the mutual inductance M of the induction motor varies, if the coefficient 1/M* is assumed as a magnetic saturation function given by a gap magnetic flux, the influence of the magnetic saturation can be canceled.
摘要翻译： 公开了一种控制感应电动机的方法，该感应电动机基于磁通分量电流指令i1d *，转矩分量电流指令i1q *和转差频率指令ωs来控制感应电动机的初级电流 使用感应电动机的初级电流的正交分量指令值，其中根据次级电阻R2设定的控制参数R2 *，I2 *和M *，感应电动机的次级漏电感12和互感M被用于 计算磁通分量电流指令i1d *，转矩分量电流指令i1q *和滑差频率指令ωs。 即使在感应电动机的互感M变化的情况下，如果系数1 / M *被假设为由间隙磁通量给出的磁饱和函数，则可以消除磁饱和度的影响。
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公开(公告)号：US4837492A
公开(公告)日：1989-06-06
申请号：US169977
申请日：1988-03-18
申请人： Ryoichi Kurosawa , Kouzou Kawata
发明人： Ryoichi Kurosawa , Kouzou Kawata
IPC分类号： G01D5/244
CPC分类号： G01D5/244
摘要： To the primary winding of a synchronous electric machine, a polyphase a.c. excitation signal from an excitation circuit is applied. Thus, an induced voltage signal, the phase of which varies by an angle proportional to a rotational position of a rotary body, is produced on the secondary winding of the synchro. A phase difference produced between the a.c. excitation signal and the induced voltage signal is detected by a phase difference detecting circuit. This phase difference detecting circuit detects not only a phase difference itself, but also detects the time at which the phase difference has been detected. On the basis of the phase difference and the time thus detected, a predictive computation circuit predicts a rotational position of the rotary body at an arbitrary time. In addition, a rate multiplier circuit for setting a value corresponding to a change in a predicted rotational position and an up/down counter circuit for counting the output thereof are further added, thereby making it possible to provide the output of the up/down counter circuit as a rotational position.
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公开(公告)号：US4527120A
公开(公告)日：1985-07-02
申请号：US529935
申请日：1983-09-08
申请人： Ryoichi Kurosawa
发明人： Ryoichi Kurosawa
摘要： A system for converting mechanical movement of a body under detection to a digital signal comprises a synchro generator having a primary and a secondary windings movable relative to each other, one of the windings capable of being coupled to said body, an exciting circuit for providing multiple-phase exciting currents to the primary winding at a frequency higher than the frequency corresponding to the maximum speed of the body, and a phase-locked-loop control circuit responsive to the output of the secondary winding for generating a frequency-multiplied digital signal at a frequency equal to the product of the frequency of an AC signal induced in the secondary winding and a predetermined factor.
摘要翻译： 用于将检测中的身体的机械运动转换为数字信号的系统包括同步发生器，其具有可相对于彼此运动的初级和次级绕组，能够耦合到所述主体的一个绕组，用于提供多个 相对于初级绕组的相位激励电流的频率高于对应于机体的最大速度的频率;以及锁相环控制电路，响应于次级绕组的输出，以产生倍频数字信号， 频率等于在次级绕组中感应的AC信号的频率与预定因子的乘积。
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公开(公告)号：US4259629A
公开(公告)日：1981-03-31
申请号：US937823
申请日：1978-08-29
申请人： Ryoichi Kurosawa
发明人： Ryoichi Kurosawa
CPC分类号： H02P21/00
摘要： The control device is provided with a frequency converter for feeding electric power to an induction motor and a compensating circuit for compensating for the delay of the response of the field flux to a control target value. The second transfer function of the compensating circuit is selected such that the resultant of the first transfer function of the field flux with respect to a control target and the second transfer function would be a constant.
摘要翻译： 控制装置设置有用于将电力馈送到感应电动机的频率转换器和用于补偿场磁通的响应延迟到控制目标值的补偿电路。 选择补偿电路的第二传递函数，使得场通量相对于控制目标和第二传递函数的第一传递函数的结果将是常数。
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公开(公告)号：US06552462B2
公开(公告)日：2003-04-22
申请号：US09871891
申请日：2001-06-04
申请人： Kazuto Sakai , Masanori Arata , Mikio Takabatake , Yoshio Hashidate , Ryoichi Kurosawa , Yosuke Nakazawa , Tadashi Tokumasu
发明人： Kazuto Sakai , Masanori Arata , Mikio Takabatake , Yoshio Hashidate , Ryoichi Kurosawa , Yosuke Nakazawa , Tadashi Tokumasu
IPC分类号： H02K2112
CPC分类号： H02K1/246 , H02K1/2766 , H02K1/2773 , H02K21/46 , H02K2213/03
摘要： A reluctance type rotating machine includes a stator 1 having armature windings 2 arranged on an inner periphery of the stator 1, a rotor 3 having a magnetic unevenness in the circumferential direction and a plurality of permanent magnets 6 arranged for negating the armature windings' flux passing between adjoining poles. Each magnet 6 is magnetized in a direction different from a direction to facilitate the rotor's magnetization. A magnetic portion 7 is provided between the pole and the interpole of the rotor 3. Owing to the provision of the magnetic portion 7, when the armature windings are not excited, more than 30% of the permanent magnets' flux is distributed in the rotor 3. Similarly, when the machine is loaded, the permanent magnets' interlinkage flux is more than 10% of composite interlinkage flux composed of armature current and the permanent magnets.
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