专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5298848A Large capacity variable speed PWM spatial vector type sub-harmonic system for driving AC electric motor 失效
标题翻译：用于驱动交流电动机的大容量变速PWM空间矢量型子谐波系统
公开(公告)号：US5298848A
公开(公告)日：1994-03-29
申请号：US797956
申请日：1991-11-26
申请人： Shigeta Ueda , Takashi Ikimi , Mitsuyuki Hombu , Noboru Ogawa , Yorito Jifuku , Kenzo Kamiyama
发明人： Shigeta Ueda , Takashi Ikimi , Mitsuyuki Hombu , Noboru Ogawa , Yorito Jifuku , Kenzo Kamiyama
IPC分类号： H02M5/45 , H02M7/515 , H02M7/521 , H02M7/527 , H02P27/06 , H03K17/0814 , H02P7/00
CPC分类号： H03K17/08144 , H02M5/4505 , H02M7/527 , H02P21/0089 , H02P21/02 , H02P21/06 , H03K2217/0081
摘要： A large capacity (1-2 MkVA) driving system for variable-speed-driving an AC motor by a power converter (inverter, converter) in which GTO (gate turn-off) thyristors are used as switching devices. In this system, high frequency GTO thyristors are connected in series, power converters are multiplexed, the AC motor is used in its plural phases, instantaneous spatial vector PWM (pulse width modulation) control is performed, vector control for the motor is performed, and a circuit for recovering snubber energy for GTO thyristors and a power factor adjusting circuit are provided. Thus, this driving system provides a torque ripple of 1% or less, speed response of 60 rad/sec or more, efficiency of 95% or more and a power factor of 98% or more.
摘要翻译：用于使用GTO（闸极关断）晶闸管作为开关装置的功率转换器（逆变器，转换器）来驱动交流电动机的大容量（1-2MkVA）驱动系统。在该系统中，高频GTO晶闸管串联连接，电源转换器多路复用，交流电机用于多相，进行瞬时空间矢量PWM（脉宽调制）控制，执行电机矢量控制，提供了用于恢复GTO晶闸管的缓冲能量的电路和功率因数调节电路。因此，该驱动系统提供1％以下的转矩脉动，60rad / sec以上的速度响应，95％以上的效率和98％以上的功率因数。

2. 发明授权

US4839834A Speed detecting apparatus 失效
标题翻译：速度检测装置
公开(公告)号：US4839834A
公开(公告)日：1989-06-13
申请号：US2202
申请日：1987-01-12
申请人： Tsutomu Omae , Toshihiko Matsuda , Youjirou Miyahara , Kenzo Kamiyama
发明人： Tsutomu Omae , Toshihiko Matsuda , Youjirou Miyahara , Kenzo Kamiyama
IPC分类号： G01P3/489 , G01P3/42 , G01P13/04
CPC分类号： G01P13/045
摘要： In a speed detecting apparatus for detecting the rotational speed of a rotating body mechanically coupled thereto, an encoder generates one cycle of a sine-wave signal each time its angular position of rotation changes by a predetermined unit amount. A zero-crossing pulse is generated at each zero-crossing point of the sine-wave signal generated from the encoder, and the phase angle of the sine-wave signal is detected on the basis of the zero-crossing point of the sine-wave signal generated from the encoder. In a high speed range, the rotational speed is detected on the basis of the ratio between the number of zero-crossing pulses and the time interval between a first one and a last one of the plural zero-crossing pulses. On the other hand, in a low speed range, the rotational speed is detected on the basis of the combination of the number of the zero-crossing pulses appearing within a predetermined period of time and the phase angle of the sine-wave signal.
摘要翻译：在用于检测与其机械耦合的旋转体的旋转速度的速度检测装置中，编码器每当其旋转角位置改变预定单位量时，就产生正弦波信号的一个周期。在从编码器产生的正弦波信号的每个过零点处产生过零脉冲，并且基于正弦波的过零点检测正弦波信号的相位角从编码器产生的信号。在高速范围内，基于过零脉冲数与多个过零脉冲中的第一个和最后一个之间的时间间隔之间的比率来检测转速。另一方面，在低速范围内，根据出现在预定时间段内的过零脉冲数与正弦波信号的相位角的组合来检测转速。

3. 发明授权

US4983875A Actuator 失效
标题翻译：执行器
公开(公告)号：US4983875A
公开(公告)日：1991-01-08
申请号：US367663
申请日：1989-06-19
申请人： Ryoso Masaki , Masahiro Kayama , Hiroshi Hayashida , Hideki Nihei , Yasunori Katayama , Hiroshi Nagase , Toshihiko Matsuda , Kenzo Kamiyama
发明人： Ryoso Masaki , Masahiro Kayama , Hiroshi Hayashida , Hideki Nihei , Yasunori Katayama , Hiroshi Nagase , Toshihiko Matsuda , Kenzo Kamiyama
IPC分类号： B25J9/04 , B25J17/02 , B25J19/02 , H01L41/09
CPC分类号： H02N2/108 , B25J17/0275 , B25J19/021 , B25J9/046 , H02N2/16
摘要： An actuator suitable for use in a joint device for driving a robot arm or in a subject follow-up device in a video camera, etc., is designed to have a mobility of a freedom of two degrees or more and is adapted to drive a movable part directly using first piezoelectric motor elements each of which consists of piezoelectric elements having a non-ring-like configuration and an elastic body and second piezoelectric motor elements each of which consists of at most one ring-like piezoelectric element and an elastic member. The actuator exhibits a simplified structure, is small and lightweight, provides a powerful driving power and has a wide range of mobility.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式