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David L Dickmander

from Raleigh, NC
Age ~64
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Also known as:
David Lynn Dickmander, Dave Dickmander
Related to:
Janet R Dickmander, 64
Connected to:
Alyssa Dickman, 36Becky A Dickman, 71Cassandra L Dickmann, 31Catherine C Dickman, 89Cherie R Dickmann, 50Claudia L Dickman, 71Deborah A Dickman, 72Dion K Dickman, 47Jennifer L Dickman, 44Jo A Dickman, 89

David Dickmander Phones & Addresses

  • Raleigh, NC
  • 103 Stoneford Ct, Cary, NC 27513 (919) 468-8510
  • Monroeville, PA
  • Pittsburgh, PA

Work

Company: Hitachi abb power grids Jul 2020 Position: Consulting director

Skills

Electrical Engineering • Engineering • Power Systems • Smart Grid • Electronics • Manufacturing • Power Generation • Energy • Renewable Energy • Project Engineering • Engineering Management • Power Distribution • Project Management • Product Development

Industries

Electrical/Electronic Manufacturing

Resumes

Resumes

David Dickmander Photo 1

Consulting Director

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Location:
Raleigh, NC
Industry:
Electrical/Electronic Manufacturing
Work:
Hitachi Abb Power Grids
Consulting Director
Abb
Consulting Director
Abb
Executive Consulting Engineer
Skills:
Electrical Engineering
Engineering
Power Systems
Smart Grid
Electronics
Manufacturing
Power Generation
Energy
Renewable Energy
Project Engineering
Engineering Management
Power Distribution
Project Management
Product Development

Publications

Us Patents

Systems And Methods For Inverter Waveform Smoothing

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US Patent:
6535403, Mar 18, 2003
Filed:
Aug 17, 2001
Appl. No.:
09/932773
Inventors:
Aaron M. Jungreis - Cary NC
David L. Dickmander - Cary NC
Jeffery Parker - Zebulon NC
Assignee:
ABB Technology AG - Zurich
International Classification:
H02M 112
US Classification:
363 42
Abstract:
Notching in a switch-mode converter is compensated for to restore a sinusoidal output voltage waveform to the output of the converter, regardless of the load current level, power level, or power factor (both distortion and displacement power factor). Waveform smoothing for a waveform in a switch-mode converter having a DC bus voltage and an output filter inductance comprises determining a ripple current in the converter; determining a time-to-zero; determining a turn-on time; determining the lesser of the time-to-zero and the turn-on time; determining a duty cycle modification based on the lesser of the time-to-zero and the turn-on time; and applying the duty cycle modification to the waveform.

Controlling Magnetizing Current In A Transformer By Comparing The Difference Between First And Second Positive Peak Values Of The Magnetizing Current With A Threshold

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US Patent:
6577111, Jun 10, 2003
Filed:
Sep 6, 2001
Appl. No.:
09/948248
Inventors:
David L. Dickmander - Cary NC
Aaron M. Jungreis - Cary NC
Jeffery Parker - Zebulon NC
Assignee:
ABB Technology AG - Zurich
International Classification:
H01F 4014
US Classification:
323356, 323359
Abstract:
Differential measurement of a transformer magnetizing current and a delta-modulation technique is used to provide compensation for dc saturation of the transformer core, with faster response times, low losses, and with immunity to dc drift in the measuring electronics. During the half-cycle in which the output voltage transitions from its positive maximum to its negative maximum, the positive peak value of the magnetizing current is determined, and during the half-cycle in which the output voltage transitions from its negative maximum to its positive maximum, the negative peak value of the magnetizing current is determined. The positive peak magnetizing current value is compared to the similar value from the previous cycle, and the onset of core saturation in the positive direction is then determined. The negative peak magnetizing current value is compared to the similar value from the previous cycle, and the onset of core saturation in the negative direction is then determined. Based on the results of the core saturation determinations, a control action is determined in accordance with a truth table.

Method And Apparatus For Mitigation Of Dynamic Overvoltage

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US Patent:
8411400, Apr 2, 2013
Filed:
Feb 26, 2008
Appl. No.:
12/528248
Inventors:
Ulf Andersson - Raleigh NC, US
Hans Bjorklund - Ludvika, SE
John Daniel - Apex NC, US
David Dickmander - Raleigh NC, US
Assignee:
ABB Technology AG - Zurich
International Classification:
H02H 3/00
US Classification:
361 62, 361 65
Abstract:
A distribution and power transformer has its primary connected to the high voltage bus of the network and its secondary connected to a switching device. Upon the occurrence of a condition known to cause a dynamic overvoltage (DOV) and the occurrence of the DOV, a control system causes the switching device to change from a nonconductive mode to a conductive mode in less than the time for one cycle of the operating frequency of the AC network. This change in switching device conduction places a short circuit across the transformer secondary and thus mitigates the DOV.

Methods And Apparatus For Detection Of Fault Direction

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US Patent:
57962596, Aug 18, 1998
Filed:
Sep 16, 1996
Appl. No.:
8/710315
Inventors:
David L. Dickmander - Cary NC
Assignee:
ABB Power T&D Company, Inc. - Raleigh NC
International Classification:
G01R 3108
US Classification:
324524
Abstract:
Apparatus and methods for detecting the direction of a fault in relation to a switch connected between a source and a load are shown to include a voltage sampler for generating samples of the voltage during first and second power cycles. A current sampler generates samples of the current during first and second cycles. A first comparator compares the current samples from the first cycle to the current samples from the second cycle and determines the sign of the difference between the samples. A second comparator compares the sign of the voltage from the first cycle to the sign of the current difference determined by the first comparator and provides an indication of fault direction in relation to such comparison. The apparatus also includes a fault inception determiner, for providing a fault inception indication in relation to the voltage samples from the first and second cycles. The fault inception determiner is a comparator which compares the voltage samples from the first cycle to the voltage samples from the second cycle and determines the sign of the difference between the samples.
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David L Dickmander from Raleigh, NC, age ~64 Get Report