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    • 6. 发明授权
    • Driving system of AC motor
    • US06531843B2
    • 2003-03-11
    • US09941791
    • 2001-08-30
    • Yoshitaka IwajiTsunehiro EndoHiroshi FujiiTatsuo Ando
    • Yoshitaka IwajiTsunehiro EndoHiroshi FujiiTatsuo Ando
    • H02P124
    • H02P6/085H02P6/18
    • The present invention provides a control algorithm which instantaneously detects magnetic pole positions in the inside of a motor including polarities of the motor. A controller 1 applies a minute voltage change vhd to a voltage command on a dc axis which constitutes an estimation magnetic pole axis of the motor 3, detects electric currents Idc, Iqc of a motor 3 and discriminates the polarities of the magnetic pole axes by making use of the difference between a cycle in which ripple components of the electric currents Idc, Iqc become positive and a cycle in which the ripple components become negative or the difference between positive-side and negative-side current change rates. Further, the minute voltage change vhd with respect to the above-mentioned voltage command is generated on both of the dc axis and the qc axis rectangular thereto, and the magnetic pole positions of the motor are directly estimated based on the current ripple components on the respective axes. Without separately providing a cycle for discriminating the polarities of the magnetic poles, the cycle from the turning-on of a power source to the starting of the motor can be shortened so that the high-speed starting of the motor can be realized.
    • 9. 发明授权
    • Semiconductor integrated circuit, PWM signal output device, and power conversion control apparatus
    • 半导体集成电路,PWM信号输出装置和电力转换控制装置
    • US07944720B2
    • 2011-05-17
    • US12192007
    • 2008-08-14
    • Takahiro SuzukiYasuo NotoharaTsunehiro EndoYuji Mori
    • Takahiro SuzukiYasuo NotoharaTsunehiro EndoYuji Mori
    • H02M1/10
    • H03K7/08G06F1/025H02P27/08
    • Provided is a control technique of a PWM conversion type power converter capable of compensating for a voltage error due to voltage drop mainly at a switching element and managing a switching time of a PWM signal at the same time, and capable of suppressing increase/decrease of software operation load and addition of a hardware circuit to the minimum. A semiconductor integrated circuit having a PWM signal generating unit which generates a PWM signal is provided with a PWM timer unit including a counter counting a pulse width of a pulse signal inputted from the outside with delay from a PWM signal, a register loading a counter value of the counter in synchronization with the PWM signal, and an A/D converting unit converting an analog signal serving as a source signal of the pulse signal inputted from the outside to a digital signal.
    • 提供了一种PWM转换型电力转换器的控制技术,其能够主要在开关元件处补偿由于电压降引起的电压误差,并且同时管理PWM信号的开关时间,并且能够抑制 软件操作负载和硬件电路的添加至少。 具有产生PWM信号的PWM信号产生单元的半导体集成电路具有PWM定时器单元,该PWM定时器单元包括对来自PWM信号的延迟从外部输入的脉冲信号的脉冲宽度进行计数的计数器单元, 的计数器,以及将从外部输入的脉冲信号的源信号用作数字信号的模拟信号的A / D转换单元。