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

US06819078B2 Space vector PWM modulator for permanent magnet motor drive 有权
公开(公告)号：US06819078B2
公开(公告)日：2004-11-16
申请号：US10684542
申请日：2003-10-14
申请人： Eddy Ying Yin Ho
发明人： Eddy Ying Yin Ho
IPC分类号： H02D540
CPC分类号： H02M7/53873 , H02P21/22
摘要： A space vector pulse-width modulator (SVPWM) and a method implemented by the modulator. A precalculation module accepts Ua and Ub modulation indexes and in response thereto, outputs modified Ua and Ub information; a sector finder has a U module which receives the modified Ua information and outputs a U sector; and a Z module which receives the U sector and the modified Ub information and outputs a Z sector. The U sector and the Z sector are 2-phase control signals for implementing 2-phase modulation. For 3-phase modulation, the SVPWM and method further possess an active vectors calculation module and an assign vectors module which receive the modified Ua and Ub information and the U sector, and which calculate active vectors for 3-phase modulation; a zero vector selector which receives the Z sector and calculates zero vectors for 3-phase modulation; and a PWM counter block which receives the active vectors and zero vectors and outputs 3-phase control signals for implementing 3-phase modulation. The SVPWM and method may have a symmetrical PWM mode, an asymmetrical PWM mode, or both. Advantageously there may also be a rescale and overmodulation module which receives duration information corresponding to the vectors and in response thereto, detects the occurrence of overmodulation. Overmodulation may be detected in response to a negative zero vector time. The module may respond to overmodulation by clamping the zero vector time to zero and rescaling the active vector times to fit within the PWM cycle. The rescaling may restrict a voltage vector to stay within hexagonal boundaries on the space vector plane, while preserving voltage phase.

2. 发明授权

US06768284B2 Method and compensation modulator for dynamically controlling induction machine regenerating energy flow and direct current bus voltage for an adjustable frequency drive system 有权
标题翻译：用于动态控制感应电机再生能量流和用于变频驱动系统的直流总线电压的方法和补偿调制器
公开(公告)号：US06768284B2
公开(公告)日：2004-07-27
申请号：US10260917
申请日：2002-09-30
申请人： Kevin Lee , Scott K. Becker , Kevin J. Schmidt
发明人： Kevin Lee , Scott K. Becker , Kevin J. Schmidt
IPC分类号： H02D540
CPC分类号： H02M7/797 , H02P21/36
摘要： A method for dynamically controlling regenerating energy flow and direct current bus voltage for an adjustable frequency drive system includes sensing a direct current voltage of a direct current bus; and sensing a plurality of alternating currents at outputs of an inverter. The sensed alternating currents are transformed to a stationary current vector. Voltage and frequency values are converted to a stationary voltage vector and an angle. The angle and the stationary current vector are transformed to a rotating current vector including torque and flux producing current components. An induction machine generating mode is determined when the torque producing current component reverses polarity. The voltage and frequency values limit the direct current voltage of the direct current bus at a predetermined threshold responsive to the generating mode. The stationary voltage vector and the angle are converted to pulse width modulated control inputs of the inverter.
摘要翻译：用于动态地控制可变频驱动系统的再生能量流和直流母线电压的方法包括感测直流母线的直流电压; 并且在逆变器的输出处感测多个交流电流。所感测的交流电流被转换成固定的电流矢量。电压和频率值被转换成一个固定的电压矢量和一个角度。将角度和固定电流矢量转换成包括产生电流分量的转矩和磁通的旋转电流矢量。当转矩产生电流分量反转极性时，确定感应电机产生模式。响应于生成模式，电压和频率值将直流总线的直流电压限制在预定阈值。将稳定电压矢量和角度转换为变频器的脉宽调制控制输入。

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