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    • 2. 发明授权
    • DC apparatus and vehicle using the same
    • 直流设备和使用其的车辆
    • US06633495B2
    • 2003-10-14
    • US10101529
    • 2002-03-20
    • Seiji IshdaToshiaki OkuyamaTetsuo KojimaKiyoshi NakataAkira Horie
    • Seiji IshdaToshiaki OkuyamaTetsuo KojimaKiyoshi NakataAkira Horie
    • H02M324
    • H02M1/143
    • The voltage applied to a power converter is detected by a voltage detector, a function generator produces a voltage proportional to this detected voltage, and a high-pass filter detects an AC component superimposed on the voltage. An adder adds a bias voltage to this AC component, and an adder adds the output from the adder and the output from the function generator. The output from the adder is compared with a triangular wave produced from a rectangular wave generator, and a switching element is controlled to make switching operation according to the compared result. When a DC current is decreased by the AC component, a resistance current Ib is increased so that the AC components superimposed on the current and resistance current can be cancelled out.
    • 施加到功率转换器的电压由电压检测器检测,功能发生器产生与该检测电压成比例的电压,高通滤波器检测叠加在电压上的AC分量。 加法器向该AC分量加上偏置电压,加法器将来自加法器的输出和来自函数发生器的输出相加。 将来自加法器的输出与由矩形波发生器产生的三角波进行比较,并且根据比较结果控制开关元件进行开关操作。 当直流电流被交流分量降低时,电阻电流Ib增加,从而可以消除叠加在电流和电阻电流上的交流分量。
    • 4. 发明授权
    • Control apparatus of electric vehicle
    • 电动车控制装置
    • US06456909B1
    • 2002-09-24
    • US09651721
    • 2000-08-30
    • Motomi ShimadaTetsuo KojimaKiyoshi NakataEiichi ToyotaToshihiko Sekizawa
    • Motomi ShimadaTetsuo KojimaKiyoshi NakataEiichi ToyotaToshihiko Sekizawa
    • B60L700
    • B60L7/26B60L2200/26Y02T10/7258
    • To determine the timing of the electrical brake for completely stopping in electrical braking control, and also to achieve both sure stopping and good riding comfort in an electric vehicle powered by the motor by decreasing the braking force at a prescribed rate of change, the torque of the electric motor is controlled by controlling the power converter which powers the motor using a power converter controller. The deceleration of the motor is computed based on the detected speed of the electric motor which is as an output of the speed detection means, the subsequent speed of the electric motor is estimated based on the detected speed and the deceleration rate of the electric motor at the time the detected rotational speed of the electric motor falls below a prescribed speed, and torque control is carried out using an electric power converter controller, based on the estimated speed.
    • 为了确定在电制动控制中完全停止的电动制动器的时机,并且通过以规定的变化率减小制动力,也能够实现由电动机驱动的电动车辆的确定停止和良好的乘坐舒适性, 通过控制使用功率转换器控制器为电机供电的功率转换器来控制电动机。 基于作为速度检测装置的输出的电动机的检测速度来计算电动机的减速度,基于电动机的检测速度和减速度来估计电动机的后续速度 电动机的检测转速下降到低于规定速度的时间,并且使用电力转换控制器基于估计速度进行转矩控制。
    • 6. 发明授权
    • DC power supply including resonant circuit for reducing switching losses
    • 直流电源包括用于减少开关损耗的谐振电路
    • US08964414B2
    • 2015-02-24
    • US13480503
    • 2012-05-25
    • Tetsuo KojimaYuichiro NozakiMasafumi MakinoTakeshi ShinomiyaTetsu Sugiura
    • Tetsuo KojimaYuichiro NozakiMasafumi MakinoTakeshi ShinomiyaTetsu Sugiura
    • H02M1/34H02M3/335
    • H02M3/33576Y02B70/1433
    • A DC power supply including a resonant circuit on a secondary side of a transformer suppresses a surge voltage during power recovery of diodes constituting a rectifier circuit, correctly estimates a load current from a secondary current of the transformer, and adjusts supplied power when a load is light. The DC power supply includes a DC voltage source, a converter, a transformer, a rectifier circuit, a resonant circuit composed of a resonant switch and a resonant capacitor, a filter reactor, a filter capacitor, a snubber diode, a snubber capacitor, a load, first and second voltage sensors, a current sensor, and a controller for controlling gate pulses of semiconductor devices constituting a converter and the resonant switch and a signal for adjusting operation timings of A/D converters converting the signals of these sensors.
    • 包括变压器次级侧的谐振电路的直流电源在构成整流电路的二极管的功率恢复期间抑制浪涌电压,正确地估计来自变压器的次级电流的负载电流,并且当负载为负载时,调整供电电力 光。 直流电源包括直流电压源,转换器,变压器,整流电路,由谐振开关和谐振电容器组成的谐振电路,滤波电抗器,滤波电容器,缓冲二极管,缓冲电容器,缓冲电容器 负载,第一和第二电压传感器,电流传感器和用于控制构成转换器的半导体器件的门脉冲和谐振开关的控制器,以及用于调整转换这些传感器的信号的A / D转换器的操作定时的信号。
    • 10. 发明授权
    • Solid state laser and wavelength conversion laser
    • 固体激光和波长转换激光
    • US07936804B2
    • 2011-05-03
    • US12513176
    • 2007-12-06
    • Kuniaki IwashiroHiroyuki SuzukiTetsuo KojimaTomotaka Katsura
    • Kuniaki IwashiroHiroyuki SuzukiTetsuo KojimaTomotaka Katsura
    • H01S3/08
    • H01S3/08045G02F1/353G02F1/37G02F2001/3503G02F2001/3507G02F2001/354H01S3/08H01S3/08072
    • Two convex lenses (61, 62), each of which has a focal length “f”, and a 90 degree polarization rotator (5) are interposed between solid-state laser elements (21, 22) of a symmetrical resonator having the two solid-state laser elements (21, 22); a space between the two lenses (61, 62) is made shorter than 2f; and distances between the respective lenses (61, 62) and centers of their adjacent solid-state laser elements (21, 22) are set substantially to “f”, to thus achieve a solid-state laser capable of stably performing high power transverse single mode oscillation desirably having power of 100 W or more. There is acquired a wavelength conversion laser that is further provided with a Q switch (3) and a polarization element (4) and that causes an output fundamental wave laser beam to enter nonlinear elements (91, 92) so as to undergo wavelength conversion, thereby producing a high power harmonic laser beam having a high frequency of; desirably, about 100 kHz.
    • 在具有两个固体的对称共振器的固体激光元件(21,22)之间插入两个具有焦距“f”的凸透镜(61,62)和90度偏振旋转器(5) 状态激光元件(21,22); 使两个透镜(61,62)之间的空间短于2f; 并且各透镜(61,62)与其相邻的固体激光元件(21,22)的中心之间的距离设定为大致为“f”,从而实现能够稳定地执行大功率横向单 期望具有100W或更大的功率的模式振荡。 获得进一步设置有Q开关(3)和偏振元件(4)的波长转换激光器,并且使得输出基波激光束进入非线性元件(91,92)以进行波长转换, 从而产生具有高频率的高功率谐波激光束; 理想地,约100kHz。