Thanks Damon!
Sorry for the late reply, am swamped with work.
I'm using an Etek motor with the Alltrax 4834 controller.
Sad to say, I don't remember most of the electricals I've studied
before. I have rough knowledge about series/parrallel wired batteries
from reading the lists and pages, but wouldn't claim to understand it.
There're 2 pins protruding out of the motor, which I assume is where I'm
supposed to connect the controllers and batteries to?
I also have a DC-DC converter which I have no idea at all where to
connect it to.
I've been wanting to test our the motor and controller since I got them
2 months ago but haven't had the time nor knowledge to figure out how
yet. I probably won't have time till the 2nd week of august, after that
I'll have the entire summer to spend on the bike :D
For the time being, I'm mostly alternating between school reports and
building of the solar car which we'll be racing at the Suzuka circuit on
the 5th.
I probably have half a morning this saturday, so I'll probably try to
hijack the batteries to test out the motor.
Speaking of wires, I don't have any wires yet....
Is there anything specific I should get?
Or will typical copper electrical wiring do?
Henry
damon henry wrote:
Sure lots of us could since it is something that we have all done
before. Do you have a specific motor and controller in mind? Do you
understand some basics about electrical circuits?
My setup which is rather common goes like this. It is essentially one
big series circuit. The batteries are all wired in series which means
that you hook them up positive to negative to make one large battery
(6 12 volt batteries makes one 72 volt battery). My motor and
controller are both connected in series with this battery. I have a
series wound motor with the field windings available so I can reverse
the field which reverses rotation. I also have an Alltrax 4844
controller which has 3 terminals as well as a fuse and a switch.
Hooking the controller and motor into the circuit is pretty straight
forward. If you have a series wound DC motor like I have with 4
terminals available you have to strap one of the armature leads to one
of the field leads (usually marked A1,A2 and S1,S2), this controls the
direction of the rotation. Then you hook the M- and B+ terminals of
your controller to the remaining two terminals on the motor. It
doesn't matter which one goes where so just do whatever is
convenient. You also hook your battery pack to your controller. The
positive side goes to the B+ lead and the negative side goes to the B-
lead. If you have a controller with 4 terminals the other terminal is
usually marked A1 and you don't hook anything to it. This lead is
only used for plug or regen braking or with a reversing contactor to
allow you to have an electronic reverse, these options are not often
used with a motorcycle.
You also might want to include a main switch/contactor, circuit
breaker, fuse, and or shunt somewhere in the circuit, but where
exactly is usually a matter of choice. Also most controllers with
have some small terminals for hooking up things like a throttle, key
on switch, Hi Pot lockout, half power reverse and other possible
options. You really need to know the specific controller to know
which is which although it may be marked on the case.
There really are only to tricky parts to this, one is knowing how to
make the motor spin, and the second is making the right connections to
the controller. The way I remember how to hook up the contorllers is
that you almost always have only 1 wire going to B- from the negative
side of the battery, and only 1 wire going to the M- coming from the
motor. Everything else gets connected to B+.
Of course you really should check the documentation for the controller
you are using, which may include lots of extra circuitry for options
you are not using. You need to be able to weed through the stuff you
don't need then see if what I have just written applies to your
specific case.
A couple of easy tricks for testing your connections include. To test
and make sure your motor spins in the right direction make the
armature and field connections then use a 12 volt battery and a pair
of jumper cables to spin the motor. Be sure the motor is being held
in place, or it will roll away form you. Also before you hook your
controller to your motor you can test your wiring by taking the two
leads that will be connecting to the motor and instead connecting them
to a light bulb. Ramping up the throttle should make the light bulb
light up brighter. If you are using a 48 volt controller and a 120
volt light bulb it will not light up very bright, but you should be
able to see it gradually increase from off to on about half way.
damon
From: Henry Heng <[EMAIL PROTECTED]>
Reply-To: ElectricMotorcycles <[email protected]>
To: ElectricMotorcycles <[email protected]>
Subject: [ElectricMotorcycles] Wirings
Date: Tue, 26 Jun 2007 00:47:20 +0900
Could anyone explain to me how the motor, controller and batteries
should be wired together?
Also, can I use a typical bike tachometer, if not, how else should I
calculate the rpms?
Thanks
Henry
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