Re: [EVDL] Bi-stable e-brake design extends EV's range
-- Original Message -- From: "Lee Hart" To: "Peri Hartman" ; "Electric Vehicle Discussion List" Sent: 04-Mar-20 9:07:41 AM Subject: Re: [EVDL] Bi-stable e-brake design extends EV's range From: Peri Hartman via EV Parking brakes may work that way; but every EV I've seen has still had a fully hydraulic braking system. My guess is that automotive regulations (added 100 years ago, to ban unreliable mechanical brakes) may require them. PH: sorry, I meant hydraulic. Don't know why I said cables. But same argument. ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/index.html INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Bi-stable e-brake design extends EV's range
From: Peri Hartman via EV >It says, "Usually, electromagnetic brakes require a constant power >supply to be held open." It seems they presume that most EV >manufacturers are using some sort of electromagnetic brake, where the >brake is tensioned to the closed position with a spring and held open >with an electromagnet. (I guess if there's a brake system failure, >you'll have full-on braking.) I've never seen this type of brake, except in industrial vehicles and trains. Has anyone ever seen an on-road EV that had this kind of "normally on" brakes? The closest thing I can think of are parking brakes, which can be either on or off without power. >I would think that most EVs have cable brakes. Parking brakes may work that way; but every EV I've seen has still had a fully hydraulic braking system. My guess is that automotive regulations (added 100 years ago, to ban unreliable mechanical brakes) may require them. On whether an EV's regenerative braking can bring the car to a stop: This is a software issue. If the designers want to, the controller can "regen" right down to zero, or even cause the car to then move backwards. Below some speed, you won't get any power from regen (the system's idling power is greater than the braking energy), but the motor controller can still generate torque in either direction right through zero RPM. -- Excellence does not require perfection. -- Henry James -- Lee A. Hart http://www.sunrise-ev.com ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/index.html INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Bi-stable e-brake design extends EV's range
It says, "Usually, electromagnetic brakes require a constant power supply to be held open." It seems they presume that most EV manufacturers are using some sort of electromagnetic brake, where the brake is tensioned to the closed position with a spring and held open with an electromagnet. (I guess if there's a brake system failure, you'll have full-on braking.) If this is what manufacturers are doing - which seems unlikely - then something that doesn't use constant power while not braking would help. But the invention sounds risky. Now, if the system fails, the brake is locked open. They must have some sort of override, but it isn't explained. I would think that most EVs have cable brakes. That way, the brake pedal, when pushed far enough, could always pull the mechanical cable and override any electronic systems. And I can imagine hooking up a servo to the cable system (or an alternate system) to mesh mechanical braking with regen. No power used in the braking system while not braking. Peri -- Original Message -- From: "Willie via EV" To: ev@lists.evdl.org Cc: "Willie" Sent: 04-Mar-20 7:00:33 AM Subject: Re: [EVDL] Bi-stable e-brake design extends EV's range On 3/4/20 7:35 AM, Rod Hower via EV wrote: Not sure how this can save much energy if you have regen. My 2014 Chevy Volt has 95,000 miles and the brake pads are like new. The only time I use the brakes is at the very end of stopping and holding the vehicle at a traffic light so it doesn't creep forward. I, too, am puzzled by what possible benefit this "break through" might offer. Maybe someone will explain to me. However, I'm not certain that regen will bring a car to a stop. I agree that Teslas, Bolts, and Volts will come to a stop without the use of the brake pedal. I suspect that the cars are applying brakes at lower speeds and the "throttle" is off. ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/index.html INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) -- next part -- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20200304/99acdc3a/attachment.html> ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/index.html INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Bi-stable e-brake design extends EV's range
On 3/4/20 7:35 AM, Rod Hower via EV wrote: Not sure how this can save much energy if you have regen. My 2014 Chevy Volt has 95,000 miles and the brake pads are like new. The only time I use the brakes is at the very end of stopping and holding the vehicle at a traffic light so it doesn't creep forward. I, too, am puzzled by what possible benefit this "break through" might offer. Maybe someone will explain to me. However, I'm not certain that regen will bring a car to a stop. I agree that Teslas, Bolts, and Volts will come to a stop without the use of the brake pedal. I suspect that the cars are applying brakes at lower speeds and the "throttle" is off. ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/index.html INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Bi-stable e-brake design extends EV's range
My 2017 Chevy Bolt will regen to a complete stop. I rarely touch the brake
pedal to impede forward progress more than once or twice a week.
Ed
> On Mar 4, 2020, at 5:36 AM, Rod Hower via EV wrote:
>
> Not sure how this can save much energy if you have regen. My 2014 Chevy
> Volt has 95,000 miles and the brake pads are like new. The only time I use
> the brakes is at the very end of stopping and holding the vehicle at a
> traffic light so it doesn't creep forward.
>On Wednesday, March 4, 2020, 01:31:49 AM EST, evln via EV
> wrote:
>
>
>
> https://thebrakereport.com/warner-electrics-brake-design-extends-ev-range/
> Warner Electric’s Brake Design Extends EV Range
> March 2, 2020 IVT
>
> [image
> https://thebrakereport.com/wp-content/uploads/2020/02/Screenshot-2020-02-27-at-17.14.40-702x459-1.png
> Warner Electric’s new brake design extends EV range / IVT
> ]
>
> KINGSTON, Mass. – Warner Electric, a leading brand of Altra Industrial
> Motion Corp., has developed a new electromagnetic brake that greatly reduces
> power consumption during operation.
>
> The SSPB pulse brake is highly efficient and well suited to electric vehicle
> applications – increasing range while controlling soft stops proficiently.
>
> Power saving is an important consideration in most applications, but none
> more so than the electric vehicle market. OEMs are battling to maximize the
> effective range of electric vehicles to gain an operational and market
> advantage. Increasing efficiency and reducing visits to the charge point are
> of paramount importance.
>
> The longer the range, the more productive, practical and cost-effective the
> vehicle becomes. With finite battery power to work with, focus is now
> turning to reducing the power consumption of auxiliary vehicle systems to
> further improve vehicle range.
>
> Warner Electric has leveraged its extensive experience as a global
> electromagnetic brake OEM to deliver an efficient braking solution to meet
> these requirements. The SSPB is designed to preserve battery life via its
> reduced power consumption. This Bi-stable brake relies on pulses of current
> to operate the brake, offering a distinct advantage over other devices.
>
> Usually, electromagnetic brakes require a constant power supply to be held
> open, therefore the brake is consuming energy whenever it isn’t controlling
> a stop. The SSPB brake reduces this energy consumption by relying on a
> single, short pulse of current to open or close, eliminating the need for a
> constant power supply. One pulse will be sent to close the brake and come to
> a stop, another to open them and start moving.
>
> As a result of this efficiency, the vehicle’s finite amount of stored energy
> can be used for other functions. This can serve to greatly increase range,
> improving the viability of electric vehicles in many new industries or
> environments. The power saving features benefit both pure electric vehicles
> and hybrid-electric systems.
> [© thebrakereport.com]
> ...
> https://www.ivtinternational.com/news/hybrid-electric-vehicles/breakthrough-brake-design-extends-electric-vehicle-range.html
> Breakthrough brake design extends electric vehicle range
> 27th February 2020 ...
>
>
> +
> https://www.yourmoney.com/household-bills/electric-vehicle-charge-points-at-supermarkets-double-in-two-years/
> Electric vehicle charge points at supermarkets double in two years
> 02/03/2020 The number of electric vehicle charge points at supermarkets has
> doubled in the ... Waitrose has 49 out of 349 stores with EV charge points,
> representing 14%.
> https://www.yourmoney.com/wp-content/uploads/sites/3/2020/03/Supermarket-EV-charge-points.png
>
>
>
>
> For EVLN EV-newswire posts view:
> http://www.evdl.org/archive/
> https://mail-archive.com/ev@lists.evdl.org/maillist.html
>
>
> {brucedp.neocities.org}
>
> --
> Sent from: http://electric-vehicle-discussion-list.413529.n4.nabble.com/
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> Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
>
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Re: [EVDL] Bi-stable e-brake design extends EV's range
Not sure how this can save much energy if you have regen. My 2014 Chevy Volt
has 95,000 miles and the brake pads are like new. The only time I use the
brakes is at the very end of stopping and holding the vehicle at a traffic
light so it doesn't creep forward.
On Wednesday, March 4, 2020, 01:31:49 AM EST, evln via EV
wrote:
https://thebrakereport.com/warner-electrics-brake-design-extends-ev-range/
Warner Electric’s Brake Design Extends EV Range
March 2, 2020 IVT
[image
https://thebrakereport.com/wp-content/uploads/2020/02/Screenshot-2020-02-27-at-17.14.40-702x459-1.png
Warner Electric’s new brake design extends EV range / IVT
]
KINGSTON, Mass. – Warner Electric, a leading brand of Altra Industrial
Motion Corp., has developed a new electromagnetic brake that greatly reduces
power consumption during operation.
The SSPB pulse brake is highly efficient and well suited to electric vehicle
applications – increasing range while controlling soft stops proficiently.
Power saving is an important consideration in most applications, but none
more so than the electric vehicle market. OEMs are battling to maximize the
effective range of electric vehicles to gain an operational and market
advantage. Increasing efficiency and reducing visits to the charge point are
of paramount importance.
The longer the range, the more productive, practical and cost-effective the
vehicle becomes. With finite battery power to work with, focus is now
turning to reducing the power consumption of auxiliary vehicle systems to
further improve vehicle range.
Warner Electric has leveraged its extensive experience as a global
electromagnetic brake OEM to deliver an efficient braking solution to meet
these requirements. The SSPB is designed to preserve battery life via its
reduced power consumption. This Bi-stable brake relies on pulses of current
to operate the brake, offering a distinct advantage over other devices.
Usually, electromagnetic brakes require a constant power supply to be held
open, therefore the brake is consuming energy whenever it isn’t controlling
a stop. The SSPB brake reduces this energy consumption by relying on a
single, short pulse of current to open or close, eliminating the need for a
constant power supply. One pulse will be sent to close the brake and come to
a stop, another to open them and start moving.
As a result of this efficiency, the vehicle’s finite amount of stored energy
can be used for other functions. This can serve to greatly increase range,
improving the viability of electric vehicles in many new industries or
environments. The power saving features benefit both pure electric vehicles
and hybrid-electric systems.
[© thebrakereport.com]
...
https://www.ivtinternational.com/news/hybrid-electric-vehicles/breakthrough-brake-design-extends-electric-vehicle-range.html
Breakthrough brake design extends electric vehicle range
27th February 2020 ...
+
https://www.yourmoney.com/household-bills/electric-vehicle-charge-points-at-supermarkets-double-in-two-years/
Electric vehicle charge points at supermarkets double in two years
02/03/2020 The number of electric vehicle charge points at supermarkets has
doubled in the ... Waitrose has 49 out of 349 stores with EV charge points,
representing 14%.
https://www.yourmoney.com/wp-content/uploads/sites/3/2020/03/Supermarket-EV-charge-points.png
For EVLN EV-newswire posts view:
http://www.evdl.org/archive/
https://mail-archive.com/ev@lists.evdl.org/maillist.html
{brucedp.neocities.org}
--
Sent from: http://electric-vehicle-discussion-list.413529.n4.nabble.com/
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[EVDL] Bi-stable e-brake design extends EV's range
https://thebrakereport.com/warner-electrics-brake-design-extends-ev-range/
Warner Electric’s Brake Design Extends EV Range
March 2, 2020 IVT
[image
https://thebrakereport.com/wp-content/uploads/2020/02/Screenshot-2020-02-27-at-17.14.40-702x459-1.png
Warner Electric’s new brake design extends EV range / IVT
]
KINGSTON, Mass. – Warner Electric, a leading brand of Altra Industrial
Motion Corp., has developed a new electromagnetic brake that greatly reduces
power consumption during operation.
The SSPB pulse brake is highly efficient and well suited to electric vehicle
applications – increasing range while controlling soft stops proficiently.
Power saving is an important consideration in most applications, but none
more so than the electric vehicle market. OEMs are battling to maximize the
effective range of electric vehicles to gain an operational and market
advantage. Increasing efficiency and reducing visits to the charge point are
of paramount importance.
The longer the range, the more productive, practical and cost-effective the
vehicle becomes. With finite battery power to work with, focus is now
turning to reducing the power consumption of auxiliary vehicle systems to
further improve vehicle range.
Warner Electric has leveraged its extensive experience as a global
electromagnetic brake OEM to deliver an efficient braking solution to meet
these requirements. The SSPB is designed to preserve battery life via its
reduced power consumption. This Bi-stable brake relies on pulses of current
to operate the brake, offering a distinct advantage over other devices.
Usually, electromagnetic brakes require a constant power supply to be held
open, therefore the brake is consuming energy whenever it isn’t controlling
a stop. The SSPB brake reduces this energy consumption by relying on a
single, short pulse of current to open or close, eliminating the need for a
constant power supply. One pulse will be sent to close the brake and come to
a stop, another to open them and start moving.
As a result of this efficiency, the vehicle’s finite amount of stored energy
can be used for other functions. This can serve to greatly increase range,
improving the viability of electric vehicles in many new industries or
environments. The power saving features benefit both pure electric vehicles
and hybrid-electric systems.
[© thebrakereport.com]
...
https://www.ivtinternational.com/news/hybrid-electric-vehicles/breakthrough-brake-design-extends-electric-vehicle-range.html
Breakthrough brake design extends electric vehicle range
27th February 2020 ...
+
https://www.yourmoney.com/household-bills/electric-vehicle-charge-points-at-supermarkets-double-in-two-years/
Electric vehicle charge points at supermarkets double in two years
02/03/2020 The number of electric vehicle charge points at supermarkets has
doubled in the ... Waitrose has 49 out of 349 stores with EV charge points,
representing 14%.
https://www.yourmoney.com/wp-content/uploads/sites/3/2020/03/Supermarket-EV-charge-points.png
For EVLN EV-newswire posts view:
http://www.evdl.org/archive/
https://mail-archive.com/ev@lists.evdl.org/maillist.html
{brucedp.neocities.org}
--
Sent from: http://electric-vehicle-discussion-list.413529.n4.nabble.com/
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