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Jadav Das

from Waltham, MA
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Also known as:
Jadar Das
Connected to:
Abhimanyu Das, 46Aditya Das, 40Adwitiya D Das, 57Ahin K Das, 45Akanksha Das, 30Akhilesh K Das, 50Alexander Y Das, 37Amal Das, 80Amanda S Das, 38Amol Das, 65

Jadav Das Phones & Addresses

  • Waltham, MA
  • Lake Grove, NY
  • Holbrook, NY
  • Shirley, NY
  • Nashville, TN
  • Medford, NY

Publications

Us Patents

Encoder System For Position Determination With Varying Scale

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US Patent:
20200240810, Jul 30, 2020
Filed:
Apr 14, 2020
Appl. No.:
16/847946
Inventors:
- Mayfield Heights OH, US
Xikai Sun - Shanghai, CN
Jadav Das - Lake Grove NY, US
International Classification:
G01D 5/14
G01R 33/07
G01D 11/24
G01D 5/12
G01R 33/00
G01R 33/09
Abstract:
By configuring an encoder scale as a varying scale with successively increasing or decreasing pitch, sensors in a travel path of the scale can detect a phase difference to determine an absolute position of the scale for use in an industrial control system. Due to the successively increasing or decreasing pitch, each sensor can detect successively increasing or decreasing properties (such as magnetic fields) from the scale in a uniquely identifiable pattern. By taking the difference between readings of adjacent sensors, each sensor detecting properties of the scale, an absolute position of the scale between the sensors can be determined. The principle for feedback for the encoder system is analogous to a Nonius or Vernier principle to determine absolute position.

Encoder System For Position Determination With Inclined Scale

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US Patent:
20200232826, Jul 23, 2020
Filed:
Apr 7, 2020
Appl. No.:
16/842167
Inventors:
- Mayfield Heights OH, US
Xikai Sun - Shanghai, CN
Jadav Das - Lake Grove NY, US
International Classification:
G01D 5/347
G01D 5/14
Abstract:
By configuring an encoder scale as an angled or inclined magnet or pair of oppositely arranged, adjacent magnets, a magnetic field sensor in a travel path of the scale can detect an absolute position of the scale for use in an industrial control system. Due to the angle or incline, when a first side of the scale is proximal to the sensor, the sensor can detect an angle of −180. As the scale moves to center with respect to the sensor, the sensor can detect an increasing angle to 0. Then, as a second side of the scale becomes proximal to the sensor, the sensor can detect an increasing angle to +180. The angle changes linearly with position. In one aspect, the pair of oppositely arranged magnets can be rotated with respect to the travel path to provide the angle. In another aspect, the pair of oppositely arranged magnets can be magnetized diagonally to provide the angle.

Linear Motor Track System With Automatic Gravity Detection

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US Patent:
20200186063, Jun 11, 2020
Filed:
Feb 12, 2020
Appl. No.:
16/789020
Inventors:
- Mayfield Heights OH, US
Mark R. Cooper - Eden Prairie MN, US
Patrick E. Ozimek - Mequon WI, US
Jadav Das - Lake Grove NY, US
International Classification:
H02P 7/025
H02K 41/035
B65G 35/06
H02P 29/028
H02K 11/30
H02K 11/21
Abstract:
A mover is configured to be electromagnetically propelled along a track in a linear motor track system with a force that is calculated to include compensation for gravity. A multi-axis accelerometer arranged in each segment of the track can detect an orientation or angle of the track segment for determining gravity with respect to the particular section. As a result, if the track is at an incline, such as a ramp, a desired force for moving a mover along the track can be compensated to include gravity due to the incline for achieving a desired motion result. In addition, the detected orientation of the track can be compared to an expected orientation stored by a control program to avoid a loss of performance due to physical changes in the track not matching an expected/programmed configuration of the track.

Encoder System For Position Determination With Varying Scale

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US Patent:
20190368895, Dec 5, 2019
Filed:
May 30, 2018
Appl. No.:
15/992935
Inventors:
- Mayfield Heights OH, US
Xikai Sun - Shanghai, CN
Jadav Das - Lake Grove NY, US
International Classification:
G01D 5/14
Abstract:
By configuring an encoder scale as a varying scale with successively increasing or decreasing pitch, sensors in a travel path of the scale can detect a phase difference to determine an absolute position of the scale for use in an industrial control system. Due to the successively increasing or decreasing pitch, each sensor can detect successively increasing or decreasing properties (such as magnetic fields) from the scale in a uniquely identifiable pattern. By taking the difference between readings of adjacent sensors, each sensor detecting properties of the scale, an absolute position of the scale between the sensors can be determined. The principle for feedback for the encoder system is analogous to a Nonius or Vernier principle to determine absolute position.

Encoder System For Position Determination With Inclined Scale

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US Patent:
20190368903, Dec 5, 2019
Filed:
May 30, 2018
Appl. No.:
15/992730
Inventors:
- Mayfield Heights OH, US
Xikai Sun - Shanghai, CN
Jadav Das - Lake Grove NY, US
International Classification:
G01D 5/347
Abstract:
By configuring an encoder scale as an angled or inclined magnet or pair of oppositely arranged, adjacent magnets, a magnetic field sensor in a travel path of the scale can detect an absolute position of the scale for use in an industrial control system. Due to the angle or incline, when a first side of the scale is proximal to the sensor, the sensor can detect an angle of −180. As the scale moves to center with respect to the sensor, the sensor can detect an increasing angle to 0. Then, as a second side of the scale becomes proximal to the sensor, the sensor can detect an increasing angle to +180. The angle changes linearly with position. In one aspect, the pair of oppositely arranged magnets can be rotated with respect to the travel path to provide the angle. In another aspect, the pair of oppositely arranged magnets can be magnetized diagonally to provide the angle.

Method And Apparatus For Commutation Of Drive Coils In A Linear Drive System With Independent Movers

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US Patent:
20190312533, Oct 10, 2019
Filed:
Jun 24, 2019
Appl. No.:
16/449835
Inventors:
- Mayfield Heights OH, US
Jadav Das - Lake Grove NY, US
International Classification:
H02P 6/00
H02P 25/064
H02K 41/02
H02P 25/06
Abstract:
A motor controller is provided that executes a commutation routine in one of a plurality of operating modes to regulate current provided to drive coils in a linear motion system. The motor controller generated currents for each of the drive coils in a first operating mode to minimize the copper losses in the drive coils, in a second operating mode to maximize the force applied to the mover, in a third operating mode to provide balanced currents between the drive coils, and in a fourth operating mode to provide currents according to a selected operating point that combines characteristics of the first three operating points. The motor controller may also monitor each of the drive coils for saturation and redistribute at least a portion of the current required to control operation of the mover to the other drive coils when one of the drive coils is saturated.

Method And Apparatus For Commutation Of Drive Coils In A Linear Drive System With Independent Movers

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US Patent:
20190097552, Mar 28, 2019
Filed:
Sep 28, 2017
Appl. No.:
15/719153
Inventors:
- Mayfield Heights OH, US
Jadav Das - Lake Grove NY, US
International Classification:
H02P 6/00
H02P 25/064
Abstract:
A motor controller is provided that executes a commutation routine in one of a plurality of operating modes to regulate current provided to drive coils in a linear motion system. The motor controller generated currents for each of the drive coils in a first operating mode to minimize the copper losses in the drive coils, in a second operating mode to maximize the force applied to the mover, in a third operating mode to provide balanced currents between the drive coils, and in a fourth operating mode to provide currents according to a selected operating point that combines characteristics of the first three operating points. The motor controller may also monitor each of the drive coils for saturation and redistribute at least a portion of the current required to control operation of the mover to the other drive coils when one of the drive coils is saturated/
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Jadav Das from Waltham, MA Get Report