Re: [EVDL] AC motors for mowers
Thanks for the possible explation. I gues for know I'll use the bike controller. I found out 1 thing that this one has a low freg some thing in it and it makes my motors BUZ hard at low speeds. On Sat, April 25, 2015 7:20 pm, Cor van de Water via EV wrote: > Hi Ken, > I am not sure how a hall-effect throttle works other than that it uses > magnetism instead of a resistance trace. I believe that the throttle > itself uses an AC voltage in a coil that is affected by a metal plunger > attached to the throttle pedal, but I am not sure and it does not matter > if the output from the hall effect throttle gets converted to a standard > 0-5V throttle control voltage somewhere, then it is easy > to take the pulses from the hall sensor on the mower axle and turn those > into a control voltage also to automatically maintain RPM (rev up the > motor if the hall pulses indicate that it is slowing down) this may need a > simple inverting opamp to get the correct feedback, once you have the > correct control signals. > > Hope this helps, > > > Cor van de Water > Chief Scientist > Proxim Wireless Corporation http://www.proxim.com > Email: cwa...@proxim.comPrivate: http://www.cvandewater.info > Skype: cor_van_de_water XoIP: +31877841130 > Tel: +1 408 383 7626Tel: +91 (040)23117400 x203 > > > > > -Original Message- > From: ken [mailto:k...@peakfoto.com] > Sent: Sat 4/25/2015 10:30 AM > To: Cor van de Water; Electric Vehicle Discussion List > Subject: Re: [EVDL] AC motors for mowers > > > >> If you are interested in the 36V DC motor, it even has a Hall effect >> sensor on the axle that sits on top of the motor, to maintain RPM under >> varying load, in case you'd like to add this to your controller (I >> think that simply integrating the pulse output over time to get a DC >> voltage representative of the speed and combining that with any throttle >> input to the motor controller will do the trick. I believe Worx calls >> this "intellicut" >> > > I am working on using a controller to slow down the motor for power > savings and noise for lighter grass. > > how complicated is to ad this to my existing controller that has a hall > effect throlte? > > I would be nice to have it maintian constate speed . > > > I the a cheap way to do this with out using a Bike controller and an add > on. > > could I by the board from them or ??? > > I built a box to put my headway cells in with bms, but the speed control > would be nice also. > > > > ___ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > For EV drag racing discussion, please use NEDRA > (http://groups.yahoo.com/group/NEDRA) > > > ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] AC motors for mowers
Hi Ken, I am not sure how a hall-effect throttle works other than that it uses magnetism instead of a resistance trace. I believe that the throttle itself uses an AC voltage in a coil that is affected by a metal plunger attached to the throttle pedal, but I am not sure and it does not matter if the output from the hall effect throttle gets converted to a standard 0-5V throttle control voltage somewhere, then it is easy to take the pulses from the hall sensor on the mower axle and turn those into a control voltage also to automatically maintain RPM (rev up the motor if the hall pulses indicate that it is slowing down) this may need a simple inverting opamp to get the correct feedback, once you have the correct control signals. Hope this helps, Cor van de Water Chief Scientist Proxim Wireless Corporation http://www.proxim.com Email: cwa...@proxim.comPrivate: http://www.cvandewater.info Skype: cor_van_de_water XoIP: +31877841130 Tel: +1 408 383 7626Tel: +91 (040)23117400 x203 -Original Message- From: ken [mailto:k...@peakfoto.com] Sent: Sat 4/25/2015 10:30 AM To: Cor van de Water; Electric Vehicle Discussion List Subject: Re: [EVDL] AC motors for mowers > If you are interested in the 36V DC motor, it even has a Hall effect > sensor on the axle that sits on top of the motor, to maintain RPM under > varying load, in case you'd like to add this to your controller (I think > that simply integrating the pulse output over time to get a DC voltage > representative of the speed and combining that with any throttle input to > the motor controller will do the trick. I believe Worx calls this > "intellicut" I am working on using a controller to slow down the motor for power savings and noise for lighter grass. how complicated is to ad this to my existing controller that has a hall effect throlte? I would be nice to have it maintian constate speed . I the a cheap way to do this with out using a Bike controller and an add on. could I by the board from them or ??? I built a box to put my headway cells in with bms, but the speed control would be nice also. ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] AC motors for mowers
On Fri, April 24, 2015 2:59 pm, Lee Hart via EV wrote: > ken via EV wrote: >> Where do I find the AC motors that are used to run the mower blades >> that are on the decks of the riding mowers like Recharge n Zeon hustler >> etc. I looking for myabe 750, 1000 watt motors. http://www.meangreenproducts.com/products.html I want to build a more power full mower like theres. I think there using motors like this.. http://mac.en.alibaba.com/product/1915029935-210002900/Mac_2500rpm_brushless_motor_200w_to_1000w_brushless_dc_motor.html I converted gas edger an DC electric powered one. but I want to do with out belt. mount the motor/blade on the end of the arm. I want an enclosed motor. ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] AC motors for mowers
> If you are interested in the 36V DC motor, it even has a Hall effect > sensor on the axle that sits on top of the motor, to maintain RPM under > varying load, in case you'd like to add this to your controller (I think > that simply integrating the pulse output over time to get a DC voltage > representative of the speed and combining that with any throttle input to > the motor controller will do the trick. I believe Worx calls this > "intellicut" I am working on using a controller to slow down the motor for power savings and noise for lighter grass. how complicated is to ad this to my existing controller that has a hall effect throlte? I would be nice to have it maintian constate speed . I the a cheap way to do this with out using a Bike controller and an add on. could I by the board from them or ??? I built a box to put my headway cells in with bms, but the speed control would be nice also. ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] AC motors for mowers
I use a Lynch designed flat DC motor which is available from agnimotors.com.
Originally purchased from Ebay as an ex "Robot Wars" fighting machine motor, it
runs on 36v and I use ex equipment 95Ah lead acid batteries which last at least
two seasons at a time.
My "Stiga" twin blade mulching mower has around a half hour run time on good
cells and is quieter and more powerful than the ICE it replaces.
No ear defenders needed which was a main reason for replacing it and the motor
is ideally designed for vertical shift installation.
Cedric Lynch, the innovator of the motor (and a really nice bloke) has had a
rocky time over the years with big business stealing his design so go to the
web site and take a look.
I vastly prefer AC motors for transport but these highly efficient compact DC
motors are not to be ignored for this type of application.
Russ
On Fri, 24/4/15, Cor van de Water via EV wrote:
Subject: Re: [EVDL] AC motors for mowers
To: "Electric Vehicle Discussion List"
Date: Friday, 24 April, 2015, 21:23
I have a Worx 36V mower
that has a failed controller, the (DC) motor is good and
very powerful,
I have tested it with a 24V
10A power supply and it hummed!
But I am not
needing a bladed mower since my yard is so small and uneven
that I always end up
using the weed whacker
to mow the parts that need mowing.
If you are interested in the 36V DC motor, it
even has a Hall effect sensor on the axle
that sits on top of the motor, to maintain RPM
under varying load, in case you'd like to
add this to your controller (I think that
simply integrating the pulse output over time
to get a DC voltage representative of the speed
and combining that with any throttle input
to the motor controller will do the trick. I
believe Worx calls this "intellicut"
You can pick it up locally in
Silicon Valley or pay me shipping and I will be happy to
see
it go to good use instead of the mower
sitting neglected in a corner of my terras.
Cor van de Water
Chief Scientist
Proxim
Wireless
office +1 408 383
7626 Skype: cor_van_de_water
XoIP +31 87 784 1130
private: cvandewater.info
www.proxim.com
This email
message (including any attachments) contains confidential
and proprietary information of Proxim Wireless
Corporation. If you received this message in error, please
delete it and notify the sender. Any unauthorized use,
disclosure, distribution, or copying of any part of this
message is prohibited.
-Original Message-
From: EV [mailto:ev-boun...@lists.evdl.org]
On Behalf Of Lee Hart via EV
Sent: Friday,
April 24, 2015 12:00 PM
To: Electric Vehicle
Discussion List
Subject: Re: [EVDL] AC
motors for mowers
ken via
EV wrote:
> Where do I find the AC motors
that are used to run the mower blades
>
that are on the decks of the riding mowers like Recharge n
Zeon hustler etc.
> I looking for myabe
750, 1000 watt motors.
Are
you sure they're using an AC motor? Every electric mower
I've seen used plain old brushed DC motors. Either
it's running directly on the battery (like my ElecTrak,
or Black & Decker push mower), or it's running off
the AC line with a bridge rectifier (my Rally mower).
> Also whats the differance
between Dc brushless and Ac motor?
Fundamentally, they're both AC motors.
*All* motors are really AC motors!
- A brushed DC motor uses brushes and a
commutator to convert DC
into AC for
the actual motor. Brushed motors can either
use magnets or wound field coils.
- A "brushless DC" motor is just an
AC motor with an electronic
commutator ("inverter") to convert DC into AC for
the motor.
Most (but not all)
brushless DC motor have permanent magnets.
-
An AC motor obviously just leaves off whatever device the
others
had to convert DC into AC,
since AC is already available.
Most
(but not all) AC motors don't use magnets.
> AC is 3 phase and Dc
brushless has electronics on the motor that
> changes it to AC?
Not quite. AC motors can have any number of
phases; single-phase, 2-phase, and 3-phase are the most
common.
The controller (for
any type of motor) can either be attached to the motor, or
in a separate box.
--
If you can't explain it to a six year old,
you don't understand it yourself. -- Albert Einstein
--
Lee Hart, 814 8th Ave N,
Sartell MN 56377, www.sunrise-ev.com
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http:/
Re: [EVDL] AC motors for mowers
I have a Worx 36V mower that has a failed controller, the (DC) motor is good
and very powerful,
I have tested it with a 24V 10A power supply and it hummed!
But I am not needing a bladed mower since my yard is so small and uneven that I
always end up
using the weed whacker to mow the parts that need mowing.
If you are interested in the 36V DC motor, it even has a Hall effect sensor on
the axle
that sits on top of the motor, to maintain RPM under varying load, in case
you'd like to
add this to your controller (I think that simply integrating the pulse output
over time
to get a DC voltage representative of the speed and combining that with any
throttle input
to the motor controller will do the trick. I believe Worx calls this
"intellicut"
You can pick it up locally in Silicon Valley or pay me shipping and I will be
happy to see
it go to good use instead of the mower sitting neglected in a corner of my
terras.
Cor van de Water
Chief Scientist
Proxim Wireless
office +1 408 383 7626 Skype: cor_van_de_water
XoIP +31 87 784 1130 private: cvandewater.info
www.proxim.com
This email message (including any attachments) contains confidential and
proprietary information of Proxim Wireless Corporation. If you received this
message in error, please delete it and notify the sender. Any unauthorized
use, disclosure, distribution, or copying of any part of this message is
prohibited.
-Original Message-
From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Lee Hart via EV
Sent: Friday, April 24, 2015 12:00 PM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] AC motors for mowers
ken via EV wrote:
> Where do I find the AC motors that are used to run the mower blades
> that are on the decks of the riding mowers like Recharge n Zeon hustler etc.
> I looking for myabe 750, 1000 watt motors.
Are you sure they're using an AC motor? Every electric mower I've seen used
plain old brushed DC motors. Either it's running directly on the battery (like
my ElecTrak, or Black & Decker push mower), or it's running off the AC line
with a bridge rectifier (my Rally mower).
> Also whats the differance between Dc brushless and Ac motor?
Fundamentally, they're both AC motors. *All* motors are really AC motors!
- A brushed DC motor uses brushes and a commutator to convert DC
into AC for the actual motor. Brushed motors can either
use magnets or wound field coils.
- A "brushless DC" motor is just an AC motor with an electronic
commutator ("inverter") to convert DC into AC for the motor.
Most (but not all) brushless DC motor have permanent magnets.
- An AC motor obviously just leaves off whatever device the others
had to convert DC into AC, since AC is already available.
Most (but not all) AC motors don't use magnets.
> AC is 3 phase and Dc brushless has electronics on the motor that
> changes it to AC?
Not quite. AC motors can have any number of phases; single-phase, 2-phase, and
3-phase are the most common.
The controller (for any type of motor) can either be attached to the motor, or
in a separate box.
--
If you can't explain it to a six year old, you don't understand it yourself. --
Albert Einstein
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
___
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
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For EV drag racing discussion, please use NEDRA
(http://groups.yahoo.com/group/NEDRA)
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Re: [EVDL] AC motors for mowers
ken via EV wrote:
Where do I find the AC motors that are used to run the mower blades that
are on the decks of the riding mowers like Recharge n Zeon hustler etc.
I looking for myabe 750, 1000 watt motors.
Are you sure they're using an AC motor? Every electric mower I've seen
used plain old brushed DC motors. Either it's running directly on the
battery (like my ElecTrak, or Black & Decker push mower), or it's
running off the AC line with a bridge rectifier (my Rally mower).
Also whats the differance between Dc brushless and Ac motor?
Fundamentally, they're both AC motors. *All* motors are really AC motors!
- A brushed DC motor uses brushes and a commutator to convert DC
into AC for the actual motor. Brushed motors can either
use magnets or wound field coils.
- A "brushless DC" motor is just an AC motor with an electronic
commutator ("inverter") to convert DC into AC for the motor.
Most (but not all) brushless DC motor have permanent magnets.
- An AC motor obviously just leaves off whatever device the others
had to convert DC into AC, since AC is already available.
Most (but not all) AC motors don't use magnets.
AC is 3 phase and Dc brushless has electronics on the motor that changes
it to AC?
Not quite. AC motors can have any number of phases; single-phase,
2-phase, and 3-phase are the most common.
The controller (for any type of motor) can either be attached to the
motor, or in a separate box.
--
If you can't explain it to a six year old, you don't understand it
yourself. -- Albert Einstein
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
___
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
http://lists.evdl.org/listinfo.cgi/ev-evdl.org
For EV drag racing discussion, please use NEDRA
(http://groups.yahoo.com/group/NEDRA)
[EVDL] AC motors for mowers
Where do I find the AC motors that are used to run the mower blades that are on the decks of the riding mowers like Recharge n Zeon hustler etc. I looking for myabe 750, 1000 watt motors. Also whats the differance between Dc brushless and Ac motor? AC is 3 phase and Dc brushless has electronics on the motor that changes it to AC ? ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
