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    • 3. 发明专利
    • Multiple wave inverter
    • 多波逆变器
    • JP2010263762A
    • 2010-11-18
    • JP2009133503
    • 2009-05-11
    • Nakajima Toshiyuki中島 俊之
    • NAKAJIMA ARATA
    • H02M7/493
    • PROBLEM TO BE SOLVED: To mechanically directly view the area of power of analog A-D sine waves, which facilitates calculation by direct view as compared with rectangular waves, when synthesizing them by an effective current transformer and an average voltage transformer for multiple waves. SOLUTION: In a dual wave trapezoidal system by extraction of a balanced modulated wave and a carrier wave, two phases of current and voltage under a load are synthesized by a vector balance, wherein two phases of voltage for one phase of current are synthesized into one phase on the vertical axis, and envelopes of the sum and the difference of phases of the vector balance are detected. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:为了机械地直接观察模拟AD正弦波的功率面积,这有助于通过直接观察与矩形波相比的计算,当通过有效的电流互感器和用于多个波的平均电压互感器合成它们时 。 解决方案:在通过提取平衡调制波和载波的双波形梯形系统中,负载下的两相电流和电压由矢量平衡合成,其中一相电流的两相电压为 在垂直轴上合成成一个相位,并且检测和的包络和矢量平衡的相位差。 版权所有(C)2011,JPO&INPIT
    • 4. 发明专利
    • Analog multiple wave inverter
    • 模拟多波逆变器
    • JP2008278730A
    • 2008-11-13
    • JP2007141051
    • 2007-04-25
    • Nakajima Toshiyuki中島 俊之
    • NAKAJIMA ARATA
    • H02M7/497
    • PROBLEM TO BE SOLVED: To provide an analog multiple wave inverter wherein a rated current level or more is set to a single transformer by a multiple wave system, an overcurrent and harmonics are prevented, and an analog sine wave is approached to the utmost by increasing the number of bits of a false sine wave by a D/A converter. SOLUTION: Since capacity of the single transformer is partially increased by generation of a multiple wave, and additional multiplexing is performed, an area of a false sine wave effective wave is increased by increasing the number of the bits of the D/A converter, wherein the false sine wave effective wave is divided into an average wave transformer and an effective wave transformer. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:为了提供一种模拟多波逆变器,其中通过多波系统将额定电流等级或更多设置到单个变压器,防止了过电流和谐波,并且模拟正弦波接近 最大程度地通过D / A转换器增加假正弦波的位数。 解决方案:由于单个变压器的容量通过产生多波而部分增加,并且执行附加复用,因此通过增加D / A的位数来增加伪正弦波有效波的面积 转换器,其中假正弦波有效波被分为平均波变压器和有效波变压器。 版权所有(C)2009,JPO&INPIT
    • 6. 发明专利
    • THREE PHASE 180 DEGREES-TYPE THREE PULSE RING COUNTER
    • JP2000114933A
    • 2000-04-21
    • JP31529898
    • 1998-09-30
    • NAKAJIMA TOSHIYUKI
    • NAKAJIMA ARATA
    • G06F5/08G06F5/06H02P27/06H02P27/08H03K3/02H03K3/03H02P7/63
    • PROBLEM TO BE SOLVED: To obtain a time base which can easily synchronize an input clock with a whole system by using the phase of the output of a register and outputting a rectangular wave whose one pulse of the 180 degrees rectangular wave of target use is 60 degrees and which generates conduction angles with one phase, two phases and three phases at two bit intervals from the first pulse. SOLUTION: A ring counter outputs continuous H and L shift feedings by three pulses from a shift register 4015 of dual four bits being eight bits in total and a dual four bit flop 4013. A flip flop or the shift register sychronized with pulse width modulation constitutes a three phase three pulse ring counter. Since the feeding shift of H and L can be executed by the cascade connection of the flip flop, a ring pulse can easily by controlled by feeding shift through the synchronization of input data where 1/3 pulse of a 180 degree rectangular wave can be generated with a clock. Since six diodes are opened/closed and the speed of a three phase motor is controlled by the cascade connection of the flop 4013, positive/negative output pulses are distributed by the rectangular waves of 180 degrees.
    • 7. 发明专利
    • MAGNET FLUX-VECTOR CLOSED LOOP CONTROL
    • JPH1084697A
    • 1998-03-31
    • JP27521096
    • 1996-09-09
    • NAKAJIMA TOSHIYUKI
    • NAKAJIMA ARATA
    • H02M7/48H02P27/06H02P7/63
    • PROBLEM TO BE SOLVED: To make it possible to detect magnetic flux from a current transformer through the counter electromotive force under feed-back control with high stability, taking a measure against harmonies and hysteresis, in which a three-phase PWM approximate sine wave in a closed loop is used aiming at prevention of a phase delay in flux detection or shaping of adjustment waveforms. SOLUTION: An output of magnetic flux detection is amplified by an operational amplifier 1. A command sine wave and the output of magnetic flux detection are taken out as a differential voltage by an operational amplifier 2 as a differential amplifier, and a removal ratio of phase differential factor is converted. A dislocation in phase from the current transformer is removed by a digital IC 3 as an NOT processor for free-running adjustment. The sanae phase factor as PWM signal wave between the sine wave and a truangular wave is generated and shaped by an operational amplifier 4. The output of magnetic flux detection from the current transformer and the PWM signal waveform are made equal to each other by a digital IC 5 as an AND processor.
    • 8. 发明专利
    • PWM APPROXIMATE SINE-WAVE LOGIC SYSTEM FOR VVVF
    • JPH08223929A
    • 1996-08-30
    • JP6715195
    • 1995-02-09
    • NAKAJIMA TOSHIYUKI
    • NAKAJIMA ARATA
    • H02M7/48H03K4/02
    • PURPOSE: To correct the cycle of positive sine waves and negative sine waves to output triangular waves and a phase difference by a method wherein an analog switch is controlled at the cycle of the ON/OFF operation of a binary counter and sine waves which are formed by the binary counter during the ON/OFF operation are separated into positive since waves and negative sine waves at two cycles. CONSTITUTION: The clock of a 4024 binary ripple counter 1 is used as data, a 4028 decoder 3 is used as a multiplexer switch, an output is inverted so as to be used, the output is input to an operational amplifier 6 as a D/A converter, and the output is converted into since waves so as to be fetched. In addition, the phase difference between triangular waves and the sine waves is fetched by an operation amplifier 7, and approximate sine-wave pulses are output. After that, a positive output and a negative output are separated by a 4053 analog switch 4 on another time base of the 4024 binary ripple counter 1. Thereby, the cycle of positive sine waves and negative sine waves which output the triangular waves and the phase difference can be made precise.