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Motor or controller whine????

 

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I have had this happen alot in my car. It has a d&d motor 48v and an altrax axe controller. The wiring is all new in the whole car. It uses the stock forward reverse contractor. Sometimes when I hit the accelerator it will make a sound like a kazoo and the harder you press the louder it gets. I let off the accelerator and lightly get back on. This almost always stops this whine from continuing. It has been doing this for a? thousand miles or so. I am not experiencing and problems but I am not sure what it could be. The controller is 600a and I have a 400a slow blow fuse attached to it. Any ideas what could make this noise. It is not terribly loud but you can hear it about the volume of someone talking quietly.?

Sent from my MetroPCS 4G LTE Android Device
 

Every once in a while mine does that too. It's the sound of the contact burning a little. Most often mine will do it if it has been super humid out. My quick fix is to toggle forward neutral forward to allow the contacts to try and seat better. Always works. Even with new contacts it still does it once in a while.?


On Mon, Apr 15, 2019, 8:28 PM nicholasgee58 nicholasgee58@... [C-Car] <C-Car@...> wrote:
?



I have had this happen alot in my car. It has a d&d motor 48v and an altrax axe controller. The wiring is all new in the whole car. It uses the stock forward reverse contractor. Sometimes when I hit the accelerator it will make a sound like a kazoo and the harder you press the louder it gets. I let off the accelerator and lightly get back on. This almost always stops this whine from continuing. It has been doing this for a? thousand miles or so. I am not experiencing and problems but I am not sure what it could be. The controller is 600a and I have a 400a slow blow fuse attached to it. Any ideas what could make this noise. It is not terribly loud but you can hear it about the volume of someone talking quietly.?

Sent from my MetroPCS 4G LTE Android Device
 

Mine seems to do this as well--It usually moves but not very well when it does so. Mine is an original contactor setup--but even with the Altrax controller, I assume you have at least one contactor left?

The contactors making insufficient contact seems like a reasonable cause--I suspected motor brushes or something, though I know the ones in mine were replaced recently, so it shouldn't be those.

- Jacob Field
1980 Gold ComutaCar
 

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That is from the f/r contractor. Not from the controller or the motor right? As you said I will toggle the contractor back and forth from forward to reverse sometimes and that will usually make it stop. Never knew what really made the noise. Good to know thanks.



Sent from my MetroPCS 4G LTE Android Device

-------- Original message --------
From: "Dave Brice dbrice3721@... [C-Car]" <C-Car@...>
Date: 4/15/19 8:35 PM (GMT-05:00)
To: C-Car@...
Subject: Re: [C-Car] Motor or controller whine????

?

Every once in a while mine does that too. It's the sound of the contact burning a little. Most often mine will do it if it has been super humid out. My quick fix is to toggle forward neutral forward to allow the contacts to try and seat better. Always works. Even with new contacts it still does it once in a while.?

On Mon, Apr 15, 2019, 8:28 PM nicholasgee58 nicholasgee58@... [C-Car] <C-Car@...> wrote:
?



I have had this happen alot in my car. It has a d&d motor 48v and an altrax axe controller. The wiring is all new in the whole car. It uses the stock forward reverse contractor. Sometimes when I hit the accelerator it will make a sound like a kazoo and the harder you press the louder it gets. I let off the accelerator and lightly get back on. This almost always stops this whine from continuing. It has been doing this for a? thousand miles or so. I am not experiencing and problems but I am not sure what it could be. The controller is 600a and I have a 400a slow blow fuse attached to it. Any ideas what could make this noise. It is not terribly loud but you can hear it about the volume of someone talking quietly.?

Sent from my MetroPCS 4G LTE Android Device
 

Hi Nick? and All,
? ? ? ? ?? Yes this happens and is in the motor.? But not a problem. ?? The series? motor seems to get stuck in high power/torque? mode when accelerating and pulling a lot of power.
? ? ? ? ?? I was very happy when I found out by letting off power, then power on again and amps dropped by a lot for the same speed.? So I just do that for the last 26 yrs.
? ? ? ? ? ? ? ? ? ?? Jerry Dycus

On Tuesday, April 16, 2019, 01:01:19 AM UTC, nicholasgee58 nicholasgee58@... [C-Car] wrote:






I have had this happen alot in my car. It has a d&d motor 48v and an altrax axe controller. The wiring is all new in the whole car. It uses the stock forward reverse contractor. Sometimes when I hit the accelerator it will make a sound like a kazoo and the harder you press the louder it gets. I let off the accelerator and lightly get back on. This almost always stops this whine from continuing. It has been doing this for a? thousand miles or so. I am not experiencing and problems but I am not sure what it could be. The controller is 600a and I have a 400a slow blow fuse attached to it. Any ideas what could make this noise. It is not terribly loud but you can hear it about the volume of someone talking quietly.?

Sent from my MetroPCS 4G LTE Android Device
 

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What is strange is that it is such an internment noise. Never really get it to do it when you try. Fun little cars. I keep a fire extinguisher in the car in case. But so far I have had no problems with mine. But nothing electrical is stock. Except for the forward reverse contractor.?



Sent from my MetroPCS 4G LTE Android Device

-------- Original message --------
From: "jerry freedomev freedomev@... [C-Car]" <C-Car@...>
Date: 4/16/19 4:20 AM (GMT-05:00)
To: C-Car <C-Car@...>
Subject: Re: [C-Car] Motor or controller whine????

?

Hi Nick? and All,
? ? ? ? ?? Yes this happens and is in the motor.? But not a problem. ?? The series? motor seems to get stuck in high power/torque? mode when accelerating and pulling a lot of power.
? ? ? ? ?? I was very happy when I found out by letting off power, then power on again and amps dropped by a lot for the same speed.? So I just do that for the last 26 yrs.
? ? ? ? ? ? ? ? ? ?? Jerry Dycus

On Tuesday, April 16, 2019, 01:01:19 AM UTC, nicholasgee58 nicholasgee58@... [C-Car] <C-Car@...> wrote:






I have had this happen alot in my car. It has a d&d motor 48v and an altrax axe controller. The wiring is all new in the whole car. It uses the stock forward reverse contractor. Sometimes when I hit the accelerator it will make a sound like a kazoo and the harder you press the louder it gets. I let off the accelerator and lightly get back on. This almost always stops this whine from continuing. It has been doing this for a? thousand miles or so. I am not experiencing and problems but I am not sure what it could be. The controller is 600a and I have a 400a slow blow fuse attached to it. Any ideas what could make this noise. It is not terribly loud but you can hear it about the volume of someone talking quietly.?

Sent from my MetroPCS 4G LTE Android Device
 

Yes the f/r contactor. But I go f/n/f not reverse, to avoid accidentally sending voltage the wrong way. If it does it a lot... You might have an alignment problem with your contacts, or the coil is not pulling them down correctly. Forward should be the bottom contacts, early cars were wired backwards and used the upper contacts for forward. The bottom are better.? I use a Sr48600 and the stock f/n/r contactor so similar to your set up.?
Another thing to think about is a dust cover. All it takes is one piece of crap to fall between contacts and create a problem. My stock cover no longer fits with the new controller and I am building a new cover currently.?

On Mon, Apr 15, 2019, 11:29 PM nicholasgee58 nicholasgee58@... [C-Car] <C-Car@...> wrote:
?

That is from the f/r contractor. Not from the controller or the motor right? As you said I will toggle the contractor back and forth from forward to reverse sometimes and that will usually make it stop. Never knew what really made the noise. Good to know thanks.



Sent from my MetroPCS 4G LTE Android Device

-------- Original message --------
From: "Dave Brice dbrice3721@... [C-Car]" <C-Car@...>
Date: 4/15/19 8:35 PM (GMT-05:00)
Subject: Re: [C-Car] Motor or controller whine????

?

Every once in a while mine does that too. It's the sound of the contact burning a little. Most often mine will do it if it has been super humid out. My quick fix is to toggle forward neutral forward to allow the contacts to try and seat better. Always works. Even with new contacts it still does it once in a while.?

On Mon, Apr 15, 2019, 8:28 PM nicholasgee58 nicholasgee58@... [C-Car] <C-Car@...> wrote:
?



I have had this happen alot in my car. It has a d&d motor 48v and an altrax axe controller. The wiring is all new in the whole car. It uses the stock forward reverse contractor. Sometimes when I hit the accelerator it will make a sound like a kazoo and the harder you press the louder it gets. I let off the accelerator and lightly get back on. This almost always stops this whine from continuing. It has been doing this for a? thousand miles or so. I am not experiencing and problems but I am not sure what it could be. The controller is 600a and I have a 400a slow blow fuse attached to it. Any ideas what could make this noise. It is not terribly loud but you can hear it about the volume of someone talking quietly.?

Sent from my MetroPCS 4G LTE Android Device
 

? ? ? ? ? ? Hi Nick and All,
? ? ? ? ? ? ? ? ?? Yes it is strange and intermittent and certainly can cause a contactor, especially if already pitted, to sizzle, hum. As can the motor itself.
? ? ? ? ? ? ? ? ?? Likely the field? magnetizes due to heavy starting? draw and stays that way until power is cut, then back on.
? ? ? ? ? ? ? ? ?? You should carry and axe instead of a fire extinguisher or a good power cut off switch as your main fire risk is a plasma fire that may need the wires cut.? But it is very rare to happen more than a short time as something will melt, burn up putting it out.
? ? ? ? ? ? ?

On Tuesday, April 16, 2019, 11:30:27 AM UTC, nicholasgee58 nicholasgee58@... [C-Car] wrote:




What is strange is that it is such an internment noise. Never really get it to do it when you try. Fun little cars. I keep a fire extinguisher in the car in case. But so far I have had no problems with mine. But nothing electrical is stock. Except for the forward reverse contractor.?



Sent from my MetroPCS 4G LTE Android Device

-------- Original message --------
From: "jerry freedomev freedomev@... [C-Car]"
Date: 4/16/19 4:20 AM (GMT-05:00)
To: C-Car
Subject: Re: [C-Car] Motor or controller whine????
,?
?

Hi Nick? and All,
? ? ? ? ?? Yes this happens and is in the motor.? But not a problem. ?? The series? motor seems to get stuck in high power/torque? mode when accelerating and pulling a lot of power.
? ? ? ? ?? I was very happy when I found out by letting off power, then power on again and amps dropped by a lot for the same speed.? So I just do that for the last 26 yrs.
? ? ? ? ? ? I'd cut that fuse back to 250 amp as it take likely 1k amps for a second or more to blow a 400 amp one. ? Check Altrax to see what size they recommend.
? I like to fuse both packs if 2. ? ?? Being cheap I've made my fuses from 16-12GGe solid copper wire has worked well for me for 25 yrs.? Just make sure when blown the wire doesn't move and any melted melt goes where it doesn't harm anything. I start with a small one 4" of 14gge looped at the ends to fit a bolt, etc? for the Citicar to start.? If they blow in normal hard operation, I go to 12gge.?
? ? ? ? ? ? ? ? ? ?? Jerry Dycus

On Tuesday, April 16, 2019, 01:01:19 AM UTC, nicholasgee58 nicholasgee58@... [C-Car] wrote:






I have had this happen alot in my car. It has a d&d motor 48v and an altrax axe controller. The wiring is all new in the whole car. It uses the stock forward reverse contractor. Sometimes when I hit the accelerator it will make a sound like a kazoo and the harder you press the louder it gets. I let off the accelerator and lightly get back on. This almost always stops this whine from continuing. It has been doing this for a? thousand miles or so. I am not experiencing and problems but I am not sure what it could be. The controller is 600a and I have a 400a slow blow fuse attached to it. Any ideas what could make this noise. It is not terribly loud but you can hear it about the volume of someone talking quietly.?

Sent from my MetroPCS 4G LTE Android Device
 

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I have a kilovac coming of the 48v pack and it is also fused with a 400a slow blow fuse. The frame of the car is also ungrounded. All the grounds splice together in industrial grade explosion proof boxes. Fire risk should be quite low.?



Sent from my MetroPCS 4G LTE Android Device

-------- Original message --------
From: "jerry freedomev freedomev@... [C-Car]" <C-Car@...>
Date: 4/16/19 8:15 AM (GMT-05:00)
To: C-Car@...
Subject: Re: [C-Car] Motor or controller whine????

?

? ? ? ? ? ? Hi Nick and All,
? ? ? ? ? ? ? ? ?? Yes it is strange and intermittent and certainly can cause a contactor, especially if already pitted, to sizzle, hum. As can the motor itself.
? ? ? ? ? ? ? ? ?? Likely the field? magnetizes due to heavy starting? draw and stays that way until power is cut, then back on.
? ? ? ? ? ? ? ? ?? You should carry and axe instead of a fire extinguisher or a good power cut off switch as your main fire risk is a plasma fire that may need the wires cut.? But it is very rare to happen more than a short time as something will melt, burn up putting it out.
? ? ? ? ? ? ?

On Tuesday, April 16, 2019, 11:30:27 AM UTC, nicholasgee58 nicholasgee58@... [C-Car] <C-Car@...> wrote:




What is strange is that it is such an internment noise. Never really get it to do it when you try. Fun little cars. I keep a fire extinguisher in the car in case. But so far I have had no problems with mine. But nothing electrical is stock. Except for the forward reverse contractor.?



Sent from my MetroPCS 4G LTE Android Device

-------- Original message --------
From: "jerry freedomev freedomev@... [C-Car]" <C-Car@...>
Date: 4/16/19 4:20 AM (GMT-05:00)
To: C-Car <C-Car@...>
Subject: Re: [C-Car] Motor or controller whine????
,?
?

Hi Nick? and All,
? ? ? ? ?? Yes this happens and is in the motor.? But not a problem. ?? The series? motor seems to get stuck in high power/torque? mode when accelerating and pulling a lot of power.
? ? ? ? ?? I was very happy when I found out by letting off power, then power on again and amps dropped by a lot for the same speed.? So I just do that for the last 26 yrs.
? ? ? ? ? ? I'd cut that fuse back to 250 amp as it take likely 1k amps for a second or more to blow a 400 amp one. ? Check Altrax to see what size they recommend.
? I like to fuse both packs if 2. ? ?? Being cheap I've made my fuses from 16-12GGe solid copper wire has worked well for me for 25 yrs.? Just make sure when blown the wire doesn't move and any melted melt goes where it doesn't harm anything. I start with a small one 4" of 14gge looped at the ends to fit a bolt, etc? for the Citicar to start.? If they blow in normal hard operation, I go to 12gge.?
? ? ? ? ? ? ? ? ? ?? Jerry Dycus

On Tuesday, April 16, 2019, 01:01:19 AM UTC, nicholasgee58 nicholasgee58@... [C-Car] <C-Car@...> wrote:






I have had this happen alot in my car. It has a d&d motor 48v and an altrax axe controller. The wiring is all new in the whole car. It uses the stock forward reverse contractor. Sometimes when I hit the accelerator it will make a sound like a kazoo and the harder you press the louder it gets. I let off the accelerator and lightly get back on. This almost always stops this whine from continuing. It has been doing this for a? thousand miles or so. I am not experiencing and problems but I am not sure what it could be. The controller is 600a and I have a 400a slow blow fuse attached to it. Any ideas what could make this noise. It is not terribly loud but you can hear it about the volume of someone talking quietly.?

Sent from my MetroPCS 4G LTE Android Device

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