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 Post subject: Re: Traction Motor Replacement
PostPosted: Sat Mar 23, 2013 4:31 am 
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Can someone with the noise record the the sound?


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 Post subject: Re: Traction Motor Replacement
PostPosted: Sat Mar 23, 2013 3:23 pm 
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Joined: Sat Feb 23, 2013 2:43 am
Posts: 114
Location: Tustin
HD172 wrote:
Can someone with the noise record the the sound?


It might be difficult if your rav's motor noise/hum is just above road and wind noise, which is what mine have. My personal opinion is that if you hear the motor "hum" at any speed past ~20mph, it's not right as far as EV noise goes. I only have my wife's LEAF to compare with, but that car is "motor noiseless" at any speed, even when its road and wind noise is way better (less) than the rav4ev.

There is an "up whine" and "down whine" at very low speed when you're accelerating and regen-stopping, but that's normal, partly because at those really slow speed, you hear everything. Even in the LEAF you can hear it, but much more subdued than the rav, at least my rav.

I'll try to see if I can record it, because it seems my motor hum is less when ambient temp is higher than 75F. I seem to notice it more in the morning commute when it's 50F than in the afternoon when it's 75F around here.

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 Post subject: ALL POSTS - motor whine or "HUM" (Milling Sound)
PostPosted: Sat Mar 23, 2013 4:01 pm 
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Location: Tustin
I'm going to start this thread for those owners who are getting annoyed by the Rav4ev "motor hum". You can read from this thread

viewtopic.php?f=8&t=203

where the topic was started, so without a doubt this is a real issue and not imagined. Hopefully, it's only for some owners and Toyota will address it.

For me, I thought I was being very careful to test drive it first before purchasing it, but in hindsight it was not long or thorough or fast enough. I remember not noticing it during the test drive, and that my particular Rav's motor hum is not loud enough to present a problem, but enough to start annoying me as time goes by.

What's worst is that I went to my dealer and have them check it out and the EV tech there could hear something but to him it was "normal". To be fair, it was a warm day (80F), and will admit that I could hear it but was more subdued than normal during the test drive with the tech also. The tech and service rep suggested I break it in and come back after a few more months if I still hear it. When I do comeback it will be early in the morning and coldest temp possible.

What I like to hear is from other RavEV owners on the forum what their experience with "constant motor hum" during various speeds. My experience with another EV is with my wife's LEAF, and you can only hear road noise (even wind noise in the LEAF is almost non-existence), and lower road noise in comparison with the RavEV, yet you cannot hear the LEAF's motor noise (besides the "up whine" and "down whine" from/to stop).

My opinion is that in an EV, you should not hear any motor hum at any speed besides "up whine" and "down whine". I would like some collective experience to determine if I should pursue this with Toyota, or live it with because it's "normal" for the Rav4EV? At other speeds with constant power applied, can you hear the "motor hum" over road/wind noise in your Rav4EV? Please "hum" in!

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 Post subject: Re: Rav4EV motor "HUM", can you hear it in yours?
PostPosted: Sat Mar 23, 2013 5:40 pm 
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Joined: Fri Mar 01, 2013 10:01 pm
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Location: Long Beach, CA
I haven't noticed any hum, but haven't really been listening for it either and usually have the radio on. Maybe I have been distracted by the rattle in the dash that has been annoying me :evil: . You're welcome to drive over to Long Beach and test drive mine if you want to compare.

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 Post subject: Re: Rav4EV motor "HUM", can you hear it in yours?
PostPosted: Sat Mar 23, 2013 8:18 pm 
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Joined: Wed Nov 14, 2012 9:50 pm
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Location: San Diego
Mine is really quite loud now, and I get my new motor Monday. I did already record the sound in every variation I could think of, up and down, different speeds, coasting, "backlash" (going from power to regen), etc.

I will post it on YouTube likely today.

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 Post subject: Re: Traction Motor Replacement
PostPosted: Sat Mar 23, 2013 8:21 pm 
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Joined: Wed Nov 14, 2012 9:50 pm
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Location: San Diego
HD172 wrote:
Can someone with the noise record the the sound?


I did yesterday and will post today on YouTube.

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Tony Williams
QC Charge
1780-104 La Costa Meadows Drive
San Marcos, California 92078 USA
tony@QCcharge.com
www.QCcharge.com
Twitter: QCPower
1-844-EV-PARTS
1-844-387-2787
1-760-798-0342 Office
Hours M-F, 9-5 Pacific Time


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 Post subject: Re: Rav4EV motor "HUM", can you hear it in yours?
PostPosted: Sat Mar 23, 2013 9:09 pm 
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Location: Tustin
yblaser wrote:
I haven't noticed any hum, but haven't really been listening for it either and usually have the radio on. Maybe I have been distracted by the rattle in the dash that has been annoying me :evil: . You're welcome to drive over to Long Beach and test drive mine if you want to compare.


yblaser, very appreciative of your offer. I've PM'ed you. Thank-you!

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Nissan LEAF VIN 4873
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 Post subject: Re: Rav4EV motor "HUM", can you hear it in yours?
PostPosted: Sat Mar 23, 2013 9:18 pm 
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Joined: Sat Feb 23, 2013 2:43 am
Posts: 114
Location: Tustin
TonyWilliams wrote:
Mine is really quite loud now, and I get my new motor Monday. I did already record the sound in every variation I could think of, up and down, different speeds, coasting, "backlash" (going from power to regen), etc.

I will post it on YouTube likely today.



That's great Tony! I'd really like to hear it and compare! Thanks!

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Nissan LEAF VIN 4873
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 Post subject: Re: Rav4EV motor "HUM", can you hear it in yours?
PostPosted: Sun Mar 24, 2013 4:16 am 
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I noticed a high-pitched whine on our Leaf, but I don't hear anything on the RAV4 or Volt.


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 Post subject: Re: Rav4EV motor "HUM", can you hear it in yours?
PostPosted: Sun Mar 24, 2013 4:50 pm 
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Joined: Wed Nov 07, 2012 6:50 am
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Location: San Jose, CA
No drivetrain humming in mine; at least not that I can easily hear.

An electric car is generally so quite, it is a pleasure to listen to the satellite radio or songs in my iPhone. If I turn off the radio and listen intently for anything coming from the drivetrain, I hear certain "sounds" that change in frequency as I speed up or slow down - sort of like a whinning sound, but at such a low audible level, I consider it insignificant.

In my VOLT, with the radio on, I can't really tell when the ICE is operating. With the radio off, and no chit chat with any passengers going on, after conditioning myself to carefully listen for it, I can now clearly tell when the ICE is operating. Frankly, it would bother me more if I never heard it operating, because then I would worry I'm out of gas or something is not right with the car's extended range mode.

Noises are funny that way; annoying when you hear them, then again, they can be even more worrisome when you don't. :mrgreen:

Just the size of a car's tires can be a major factor in how much noise a car makes driving down a road. To wit, yesterday I took a drive in my Z06, and the pickup noise from the tires while driving on the freeway was almost deafening. No reasonable setting on my satellite radio volume control could overcome the road noise from my Z06's steamroller size tires. That is just the nature of the beast! :lol:

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