12-03-2008, 02:07 PM | #1 |
Not Yet Wild
Join Date: Oct 2008
Posts: 19
|
A2 connection
i had my controller increased from a 300 amp to a 400 amp. i also added the 4ga wires. my kart is a 1999 48V series kart. the wiring for the A2 connection went to the controller first then a wire to the motor. question is do i need the connection to the controller or should i just run it staright to the motor and bypass this connection to the controller. also i have the 3.75 hp motor. i am asking because i read somewhere that you do not have to run this connection on the controller. and i also have the white rogers heavy duty solenoid.
thanks scott |
Today | |
Sponsored Links
__________________
This advertising will not be shown in this way to registered members. Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum |
|
12-05-2008, 05:13 PM | #2 |
Getting Wild
Join Date: Feb 2008
Posts: 76
|
Re: A2 connection
A2 deals with switching the cart from foward to reverse or vise versa while moving.
The A2 bus bar on the controllers prevents the drive wheels from locking up. As the motor turns into a generator the voltage at the A2 bus bar increases. The controller senses this condition and shorts out the armature through the plugging diode. Shorting the armature prevents the feedback loop from creating a strong field. The controller can then modulate the field current to control braking force. Reversing direction without plug brake When the direction o the motor is changed, the field polarity reverses. This is what causes the motor to spin the opposite direction. When under power, the field reverses, but the momentum of the vehicle is keeps the armature from reversing. The motor then turns into a generator. As the voltage generated by the motor flows back to through the controller and field winding, the current increases. As the current increases the field intensity increases causing more voltage to be generated. This feedback loop builds quickly to the point where the field intensity is so strong it will stop the armature from spinning. If the vehicle is still moving, this will cause the drive wheels to lock up. This energy buildup happens very quickly inside the motor and controller. How it works The controller detects plugging by comparing the voltage across a diode connected to the A2 bus bar. If there is voltage across the diode, the controller switches the PWM of the controller to a low duty and frequency mode. A “whine” may be heard during plug braking, this is normal a normal condition of the reduced frequency of the PWM. Using the slower and lower powered, allows the controller to safely control the speed of the armature. As the motor slows, the armature voltage drops. This results in a loss of braking torque as speed approaches zero and no braking at a stop. When the voltage across the diode drops to zero, the controller resumes normal PMW operation. The armature now spins in the reverse direction. The energy dissipated by plug braking is converted into heat in the motor and controller. Plug braking is an essential feature for some applications. When the direction reverses on a series wound motor, plug braking turns a dangerous situation into a safe one. The controlled braking and smooth stop protects not only the operator but the motor and the controller. |
12-07-2008, 05:03 PM | #3 |
Not Yet Wild
Join Date: Oct 2008
Posts: 19
|
Re: A2 connection
ok. sounds like i need to leave it alone. does it matter if i run the 4ga wire to the motor instead of the controller and just leave the 6 ga wire from the controller to the motor.
thanks scott |
12-07-2008, 05:06 PM | #4 |
nimda
Join Date: Jun 2007
Posts: 13,022
|
Re: A2 connection
|
12-07-2008, 06:21 PM | #5 |
Getting Wild
Join Date: Nov 2008
Location: Augusta, GA & Myrtle Beach, SC
Posts: 127
|
Re: A2 connection
Agreed........I performed a 36 to 48 upgrade on an E-Z-GO and with the 650 amp controller and HP motor, I was one wire short of a total upgrade. Ran the cart anyways and that one 6 ga wire almost acted like a fuse. Do em all or do em none.
|
12-07-2008, 07:54 PM | #6 |
Not Yet Wild
Join Date: Oct 2008
Posts: 19
|
Re: A2 connection
i did all of the wires except the 1 from the A2 on motor to the controller and that is why i connected the 1 from the fr switch to the motor first. then ran the original from the motor to controller on the A2. i was assuming this only feeds a amp or volt signal to the controller. does that make sense.
thanks scott |
|
|
Similar Threads | ||||
Thread | Forum | |||
91 G9 hose connection location?? | Gas Yamaha | |||
Charger connection problem | Electric EZGO | |||
Smokin' Deal with a loose connection | Electric Club Car | |||
A1 connection | Electric EZGO |