4 lug and 3 lug controllers

khoff99 · 06-28-2013, 07:43 AM

Can anyone tell me why some controllers have the A+ lug and some only have 3? Are the 4 lug controllers for series carts?

Streetbu · 06-28-2013, 08:09 AM

I'm thinking this needs to go into the electric section, probably wont get an answer in the lifted carts area...

scottyb · 06-28-2013, 08:11 AM

4 lug controllers are for ...... forklifts

This design dumps plug braking into the controller, like when you just can;t stop before shifting into forward while rolling in reverse.

A little search of the internet found this explanation:

Dynamic braking is switching the motor from using a power source to a
generator that retards the machine by generating current into a load bank.
The motor continues to turn the same direction as it is slowed.

Plug braking a motor, is throwing it from full speed in one direction to
full speed in the other. This requires a reversed forward magnetic motor
contactor that has a time delay circuit, so that the forward contactor coil
will drop out before the reversed contactor comes on.

It is like a reversing motor contactor that may have a mechanical interlock,
so both contactors cannot come on at the same time, but delays the switch
over until the motor inductances is reduce some.

Do not use plug braking in a EV unless you want to destroy something.

Regenerative braking is something like dynamic braking, except instead of
burning up the energy in a load bank, but putting into a battery pack, or
use the rotation energy to keep running mechanical driven accessories of the
motor it self which also helps it brake.

lockman1 · 06-30-2013, 07:41 AM

Good answer Scotty!

06-28-2013, 07:43 AM	#1
khoff99 Not Yet Wild Join Date: May 2009 Posts: 54	4 lug and 3 lug controllers Can anyone tell me why some controllers have the A+ lug and some only have 3? Are the 4 lug controllers for series carts?
khoff99 Not Yet Wild Join Date: May 2009 Posts: 54

06-28-2013, 08:09 AM	#2
Streetbu Gone Wild Join Date: Jun 2012 Location: Central NY Posts: 1,020	Re: 4 lug and 3 lug controllers I'm thinking this needs to go into the electric section, probably wont get an answer in the lifted carts area...

06-28-2013, 08:11 AM	#3
scottyb Happy Carting Join Date: Dec 2007 Location: Southern California Posts: 73,406	Re: 4 lug and 3 lug controllers 4 lug controllers are for ...... forklifts This design dumps plug braking into the controller, like when you just can;t stop before shifting into forward while rolling in reverse. A little search of the internet found this explanation: Dynamic braking is switching the motor from using a power source to a generator that retards the machine by generating current into a load bank. The motor continues to turn the same direction as it is slowed. Plug braking a motor, is throwing it from full speed in one direction to full speed in the other. This requires a reversed forward magnetic motor contactor that has a time delay circuit, so that the forward contactor coil will drop out before the reversed contactor comes on. It is like a reversing motor contactor that may have a mechanical interlock, so both contactors cannot come on at the same time, but delays the switch over until the motor inductances is reduce some. Do not use plug braking in a EV unless you want to destroy something. Regenerative braking is something like dynamic braking, except instead of burning up the energy in a load bank, but putting into a battery pack, or use the rotation energy to keep running mechanical driven accessories of the motor it self which also helps it brake.

06-30-2013, 07:41 AM	#4
lockman1 What the ....? Join Date: Jan 2007 Location: N.E. Wisconsin Posts: 14,927	Re: 4 lug and 3 lug controllers Good answer Scotty!

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