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Charles D Rollman

from Maryville, IL
Age ~75
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Also known as:
Chas D Rollman, Charles D Roliman, Charles D Richard, Charles D Richards, Roliman D Charles
Related to:
Michael Ashley, 42Ashley Swan, 72Gail A Rollm, 72Rebecca L Hosmer-Mcdaniel, 62Roger Richards, 75
Connected to:
Brian R Rollman, 43Chris M Rollman, 71Fredric A Rollman, 69Gail A Rollman, 65Glen T Rollman, 90Kevin L Rollman, 46Kirk P Rollman, 60Lisa A Rollman, 59Teri L Rollman, 65Thomas E Rollman, 66

Charles Rollman Phones & Addresses

  • Maryville, IL
  • 1310 Lyric Pt, Colorado Spgs, CO 80906 (719) 328-1458
  • Colorado Springs, CO
  • 26 Newton Rd, Sudbury, MA 01776 (978) 443-8573
  • Brookline, MA
  • Wayland, MA
  • 26 Newton Rd, Sudbury, MA 01776 (508) 353-9088

Work

Position: Production Occupations

Education

Degree: Bachelor's degree or higher

Resumes

Resumes

Charles Rollman Photo 1

Principal Engineer, Part Time

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Location:
Colorado Springs, CO
Industry:
Industrial Automation
Work:
Copley Controls Corp
Principal Engineer, Part Time
Education:
Massachusetts Institute of Technology 1971 - 1974
Masters, Electronics Engineering, Electronics Lehigh University 1967 - 1971
Bachelors, Electronics Engineering, Electronics Millburn High School 1964 - 1967
Charles Rollman Photo 2

Principal Engineer At Copley Controls Corp

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Location:
Colorado Springs, Colorado Area
Industry:
Electrical/Electronic Manufacturing
Experience:
Copley Controls Corp (Public Company; 51-200 employees; Electrical/Electronic Manufacturing industry): Principal Engineer,  (-) 
Charles Rollman Photo 3

Charles Rollman

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Business Records

Name / Title
Company / Classification
Phones & Addresses
Charles Rollman
Director Information Technology
Copley Controls Corporation
Mfg Electronic Components Mfg Radio/TV Communication Equipment · Audio & Video Equip Mfg
20 Dan Rd, Canton, MA 02021
(781) 828-8090, (781) 828-6547

Publications

Us Patents

Motor Control

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US Patent:
8598819, Dec 3, 2013
Filed:
Apr 29, 2010
Appl. No.:
12/769992
Inventors:
Charles Rollman - Colorado Springs CO, US
Assignee:
Analogic Corporation - Peabody MA
International Classification:
H02P 3/14
H02P 3/18
US Classification:
318376, 318139, 31840002, 318432, 318434
Abstract:
A system includes a power supply output sensor that senses an output level of a power supply during active motor control of a motor using the power supply and generates a signal indicative thereof. The motor regenerates energy and the power supply absorbs energy regenerated by the motor. The system also includes a motor controller that, in response to the signal satisfying a predetermined threshold, controls an electrical current supplied to the motor for active control of the motor based on a set of instructions that mitigate increases in the output level of the power supply from the absorption of the energy regenerated in the motor.

Current Sensing And Measurement In A Pulse Width Modulated Power Amplifier

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US Patent:
20030006749, Jan 9, 2003
Filed:
Jun 4, 2002
Appl. No.:
10/162376
Inventors:
Charles Rollman - Sudbury MA, US
Assignee:
Copley Controls Corporation
International Classification:
G01R019/00
US Classification:
324/076110
Abstract:
A current sensor apparatus is disclosed for use with an inverter bridge that is controlled by a pulse width modulator (PWM) control apparatus and is connected to an inductive load. The current sensor apparatus includes a plurality of current sensors disposed in series with each of the low side switches in the inverter bridge. The PWM control apparatus samples the current sensors when the PWM control apparatus provides the necessary signals to open all of the high side switches in the inverter bridge and to close all of the low side switches. Due to the inductive nature of the load, the load current will continue to flow during the time in which the low side switches are closed and the high side switches are open. During this time, the current sensors are sampled and provide an output signal that is indicative of the magnitude of the current. The PWM control apparatus limits the duty cycle of the PWM signals to a predetermined value that is less than 100%. The actual value of the duty cycle limit is determined to ensure that the pulse width of the PWM signals is sufficiently wide to allow for accurate and reliable current sampling. If the load comprises motor windings that are connected in a “wye” configuration, the current sensors need only be inserted into all but one of the low side switch circuits. In this instance, the current that is not sensed may be derived from the measurements of the other currents.

Capacitance Measurement Apparatus

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US Patent:
42439337, Jan 6, 1981
Filed:
Sep 20, 1978
Appl. No.:
5/944160
Inventors:
Charles D. Rollman - Concord MA
Assignee:
Analogic Corporation - Wakefield MA
International Classification:
G01R 2726
US Classification:
324 60CD
Abstract:
Capacitance measurement apparatus in which an output signal representative of the capacitance of a capacitor under test is provided without requirement for absolute measurement of the voltage level or absolute measurement of time interval. A first signal is provided representing the voltage difference between the charge levels of the capacitor. A second signal is provided representing the average current from the capacitor during the time interval that the capacitor undergoes a change in its charge states. The ratio of the second signal to the first signal is representative of capacitance.
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Charles D Rollman from Maryville, IL, age ~75 Get Report