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Title: Low power, scalable multichannel high voltage controller

Abstract

A low voltage control circuit is provided for individually controlling high voltage power provided over bus lines to a multitude of interconnected loads. An example of a load is a drive for capillary channels in a microfluidic system. Control is distributed from a central high voltage circuit, rather than using a number of large expensive central high voltage circuits to enable reducing circuit size and cost. Voltage is distributed to each individual load and controlled using a number of high voltage controller channel switches connected to high voltage bus lines. The channel switches each include complementary pull up and pull down photo isolator relays with photo isolator switching controlled from the central high voltage circuit to provide a desired bus line voltage. Switching of the photo isolator relays is further controlled in each channel switch using feedback from a resistor divider circuit to maintain the bus voltage swing within desired limits. Current sensing is provided using a switched resistive load in each channel switch, with switching of the resistive loads controlled from the central high voltage circuit.

Inventors:
 [1];  [2];  [3];  [4]
  1. Livermore, CA
  2. Fremont, CA
  3. Dublin, CA
  4. Fort Worth, TX
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
927908
Patent Number(s):
7348688
Application Number:
11/330,269
Assignee:
Sandia Corporation (Livermore, CA)
Patent Classifications (CPCs):
H - ELECTRICITY H02 - GENERATION H02M - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS
H - ELECTRICITY H02 - GENERATION H02J - CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Stamps, James Frederick, Crocker, Robert Ward, Yee, Daniel Dadwa, and Dils, David Wright. Low power, scalable multichannel high voltage controller. United States: N. p., 2008. Web.
Stamps, James Frederick, Crocker, Robert Ward, Yee, Daniel Dadwa, & Dils, David Wright. Low power, scalable multichannel high voltage controller. United States.
Stamps, James Frederick, Crocker, Robert Ward, Yee, Daniel Dadwa, and Dils, David Wright. Tue . "Low power, scalable multichannel high voltage controller". United States. https://www.osti.gov/servlets/purl/927908.
@article{osti_927908,
title = {Low power, scalable multichannel high voltage controller},
author = {Stamps, James Frederick and Crocker, Robert Ward and Yee, Daniel Dadwa and Dils, David Wright},
abstractNote = {A low voltage control circuit is provided for individually controlling high voltage power provided over bus lines to a multitude of interconnected loads. An example of a load is a drive for capillary channels in a microfluidic system. Control is distributed from a central high voltage circuit, rather than using a number of large expensive central high voltage circuits to enable reducing circuit size and cost. Voltage is distributed to each individual load and controlled using a number of high voltage controller channel switches connected to high voltage bus lines. The channel switches each include complementary pull up and pull down photo isolator relays with photo isolator switching controlled from the central high voltage circuit to provide a desired bus line voltage. Switching of the photo isolator relays is further controlled in each channel switch using feedback from a resistor divider circuit to maintain the bus voltage swing within desired limits. Current sensing is provided using a switched resistive load in each channel switch, with switching of the resistive loads controlled from the central high voltage circuit.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2008},
month = {3}
}

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