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Anonymous Poster

GD2 value of electrical motor

04/04/2009 11:19 PM

what is the GD square value of electrical mot

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Guru

Join Date: Oct 2008
Posts: 40516
#1

Re: GD2 value of electrical motor

04/04/2009 11:29 PM

1

Power-User

Join Date: Oct 2008
Location: Jakarta Indonesia
Posts: 123
#2

Re: GD2 value of electrical motor

04/06/2009 2:46 AM

Dear all,

Flywheel effect. G is mass of motor rotor, D is the average (or effective) Diameter of the mass. Larger GD2 means more difficult to start up the motor. Smaller GD2 means easier to the start up. Each motor has different rotor GD2. ask motor vendor for a data-sheet. It is now more common to use inertia than GD2. Inertial is GR2, (R = D/2), so, Inertia is (GS2)/4.

Regards

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Akihito Shigeno @ JGC-Indonesia
Anonymous Poster
#3

Re: GD2 value of electrical motor

11/10/2009 8:11 AM

thank you your information shiva india

Anonymous Poster
#7

Re: GD2 value of electrical motor

08/31/2010 5:39 AM

How To calculate the GD2 Value of Wheel outer dia 500mm, inner dia 300mm, thickness of wheel is 180 mm. please explain in detail describing all the detail formulas.

Power-User

Join Date: Oct 2008
Location: Jakarta Indonesia
Posts: 123
#9

Re: GD2 value of electrical motor

10/12/2010 10:13 PM

Dear all,

Width = 0.18m

Weight = 7800kg / m3 (assumed as steel)

Inertia = (0.25 ^2 - 0.15 ^2) x 1/2 x 0.18 x 7800 = 28.08 kg m2

GD2 = 4 x inertia = 112.32 kg m2

Regards

__________________
Akihito Shigeno @ JGC-Indonesia
Anonymous Poster
#8

Re: GD2 value of electrical motor

10/12/2010 10:09 AM

THANK U VRY MUCH .UR AWESOME...

KRUPAUL

INDIA

Anonymous Poster
#4

Re: GD2 value of electrical motor

11/17/2009 6:00 AM

IS = 4XGARVITATIONAL ACCELERATION X MASS MOMENT OF INERTIA......... SULEKHA

Anonymous Poster
#5

Re: GD2 value of electrical motor

06/19/2010 5:22 AM

yes it is but gd2 value is more important for material handling conveyor motor.............

Off Topic (Score 5)
Anonymous Poster
#6

Re: GD2 value of electrical motor

06/19/2010 5:28 AM

can you help me to calculate value or formula of gd2 for belt screw system.............

Off Topic (Score 5)
Participant

Join Date: Jul 2013
Posts: 1
#10

Re: GD2 value of electrical motor

07/10/2013 10:41 AM

i want to know wen i run same load on different GD square motor wat will be d effect both motor run wid same kw or different

if different pls tell d reason??/

Guru

Join Date: May 2008
Posts: 1807
#11

Re: GD2 value of electrical motor

07/16/2013 10:38 AM

Dear Friend,

GD^2 Value is the ABILITY for motor or prime mover to start or move in a given time with out any problem. Higher the GD^2 value LESSER will be the Acceleration or PICK-UP of ROTATIONAL SPEED, and Vise-Versa.

In the case of Motor - the current drawn will be high for longer duration, if GD^2 is High and Vise-Versa. That is why Soft Starters, or Auto-Slip Resistors or Grid Resistance in the Rotor is used to limit the current and provide additional torque, which will accelerate fast, or or PICK-UP of ROTATIONAL SPEED fast.

DHAYANANDHAN.S