If the frequency of the inverter matches one of the chord frequencies of the chassis, it'll resonate through the motors and chassis and be much louder compared to normal. In addition, when you're maintaining speed instead of accelerating or decelerating, there's no "slip" (as it's called) in the motors (has to do with the magnetic field) and the frequency is a bit louder than otherwise.
2017 That whistle sound
I typically drive with the radio at least at low volume but yesterday I did a whole trip in my 2017 LT with the radio off so I could talk to passengers. I noticed a whistling sound which happens only at one specific throttle position. It reminds me of the sound you get out of a cordless drill when you only press the trigger slightly and the motor makes a whistling sound.
Letting up on the throttle just a tiny bit or pressing it a little more just a tiny bit makes it go away. I'd say the throttle position where it happens is maybe 1/10 throttle, maybe less: about the point where you'd have it if you are trying to hold say 30 MPH.
So my question: I assume this is normal and this is typical of how electric motor power is modulated (like a cordless drill)? It's not very loud but it's noticeable inside the cabin with all the windows up.
Thanks,
Mike
Letting up on the throttle just a tiny bit or pressing it a little more just a tiny bit makes it go away. I'd say the throttle position where it happens is maybe 1/10 throttle, maybe less: about the point where you'd have it if you are trying to hold say 30 MPH.
So my question: I assume this is normal and this is typical of how electric motor power is modulated (like a cordless drill)? It's not very loud but it's noticeable inside the cabin with all the windows up.
Thanks,
Mike
1 - 2 of 8 Posts
I don't think it's intentional; it's just a result of the inverter current being much higher during high throttle. I do believe Toyota has engineered theirs to be intentionally audible, as it's way louder than any other hybrid I've ever heard, even in brand new Priuses. It's still very high pitched and soft, but I can hear a Prius pull up along side me with my windows up if my radio's off.I like this sound. Reminds me of a "turbo hiss." I was wondering if GM might have even purposely made it intentionally audible since it's only at high throttle. Some EV manufacturers have been looking at ways to provide more audible feedback to drivers accustomed to the controlled explosions of a gas engine.
1 - 2 of 8 Posts
- This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
GM Volt Forum
A forum community dedicated to Chevy Volt electric car owners and enthusiasts. Come join the discussion about hybrid performance, modifications, classifieds, troubleshooting, maintenance, reviews, and more!
Full Forum Listing
Recommended Communities
