公开(公告)号：US06664769B1

公开(公告)日：2003-12-16

申请号：US10199646

申请日：2002-07-20

申请人： Richard Haas

发明人： Richard Haas

IPC分类号： G05F170

CPC分类号： G05F1/70

摘要： Active power factor correction (PFC) circuits are used to minimize unwanted harmonic distortion in applications where AC electrical power is rectified to produce DC power needed for operating electrical equipment. A variable amplitude regulator (VAR) is a PFC control interface which is simpler to implement than conventional circuits, and offers a wider dynamic operating range. The VAR functions as a resistor scaling network using a two-stage RC filter to maintain the DC output voltage constant for various load conditions and to maintain the rectified current in phase with the sinusoidal circuit flow in an AC power line, through both slow and rapid changes in the load coupled to the direct current output. This control interface offers excellent performance characteristics and requires only a few components for a useful implementation.

摘要翻译： 有源功率因数校正（PFC）电路用于在交流电力整流以产生操作电气设备所需的直流电力的应用中减少不需要的谐波失真。 可调幅度调节器（VAR）是一种PFC控制接口，比传统电路更简单实现，并提供更广泛的动态工作范围。 VAR作为电阻器缩放网络使用两级RC滤波器，以在不同的负载条件下保持直流输出电压恒定，并通过慢速和快速的方式将整流电流与交流电源线中的正弦电流保持同相 耦合到直流输出的负载变化。 该控制界面提供了出色的性能特性，只需要少量组件便于实现。

公开(公告)号：US06634376B2

公开(公告)日：2003-10-21

申请号：US09931354

申请日：2001-08-16

申请人： Richard Haas

发明人： Richard Haas

IPC分类号： F04F500

CPC分类号： F16K15/141 ,  F04F5/10 ,  F04F5/44 ,  F16K7/075 ,  Y10T137/2849 ,  Y10T137/3331 ,  Y10T137/7889 ,  Y10T137/87587 ,  Y10T137/87643

摘要： An anti-backflow eductor has a resilient sealing sleeve disposed on a water port defining blind end tube. The sleeve has a thinner wall cross section at a discharge end to enhance sealing while facilitating increased water flow. The ports in the blind end tube extend into a radial tube flange at the tube's inlet end to facilitate water flow out of the ports between the sleeve and tube. A tapered seat in the housing, together with cross bars in the vents, reduces the air vent cross section and relative motion between sleeve and housing to reduce sleeve wear. The eductor comprises an anti-backflow housing and a venturi housing coupled together for relative rotation but being inseparable under normal conditions to inhibit venturi use without the anti-backflow function of the anti-backflow housing.

摘要翻译： 防回流喷射器具有设置在限定盲端管的水口上的弹性密封套筒。 套筒在排放端具有较薄的壁横截面，以增强密封性，同时有助于增加水流量。 盲端管中的端口在管的入口端延伸到径向管凸缘中，以便于水从套筒和管之间的端口流出。 壳体中的锥形座与通风孔中的横杆一起减少了排气孔的横截面和套筒与壳体之间的相对运动，以减少套筒的磨损。 喷射器包括反向回流壳体和文氏管壳体，其联接在一起用于相对旋转，但在正常条件下不可分离，以阻止文丘里管使用而没有防回流壳体的防回流功能。

公开(公告)号：US06982547B2

公开(公告)日：2006-01-03

申请号：US10735337

申请日：2003-12-12

申请人： Richard Haas

发明人： Richard Haas

IPC分类号： G05F1/70

CPC分类号： G05F1/70

摘要： Active power factor correction (PFC) circuits are used to minimize unwanted harmonic distortion in applications where AC electrical power is rectified to produce DC power needed for operating electrical equipment. A variable amplitude regulator (VAR) is a PFC control interface which is simpler to implement than conventional circuits, and offers a wider dynamic operating range. The VAR functions as a resistor scaling network using a two-stage RC filter to maintain the DC output voltage constant for various load conditions and to maintain the rectified current in phase with the sinusoidal circuit flow in an AC power line, through both slow and rapid changes in the load coupled to the direct current output. This control interface offers excellent performance characteristics and requires only a few components for a useful implementation.

摘要翻译： 有源功率因数校正（PFC）电路用于在交流电力整流以产生操作电气设备所需的直流电力的应用中减少不需要的谐波失真。 可调幅度调节器（VAR）是一种PFC控制接口，比传统电路更简单实现，并提供更广泛的动态工作范围。 VAR作为电阻器缩放网络使用两级RC滤波器，以在不同的负载条件下保持直流输出电压恒定，并通过慢速和快速的方式将整流电流与交流电源线中的正弦电流保持同相 耦合到直流输出的负载变化。 该控制界面提供了出色的性能特性，只需要少量组件便于实现。

公开(公告)号：USD370402S

公开(公告)日：1996-06-04

申请号：US40838

申请日：1995-06-28

申请人： Prem K. Anand ,  Richard Haas

设计人： Prem K. Anand ,  Richard Haas