topbanner.gif
Login
Username

Password




Not a member yet?
Click here to register.

Forgotten your password?
Request a new one here.
Shoutbox
You must login to post a message.

NewBean
06/12/2019 3:57 PM
Just waiting on my TC4 shipment then it's roasting time

snwcmpr
06/03/2019 11:37 AM
I rarely purchase roasted coffee. I just ordered 4 bags from Mountain Air Roaster.

tm97
05/30/2019 12:34 PM
Hi, I use a wok with a glass lid for roasting. shaking the wok is a good exercise, actually.

NetriX
05/29/2019 9:08 PM
morning

snwcmpr
05/27/2019 1:56 AM
Kenya Nyeri Katogoto

Users Online
Guests Online: 3

Members Online: 0

Total Members: 6,015
Newest Member: rblankin
In Memory Of Ginny
Donations

Latest Donations
Groveland Hill Roas... - 25.00
renatoa - 2.00
JitterzZ - 50.00
PRABHATH COFFEE WORKS - 10.00
John Despres (Scene... - 25.00

View Thread

Who is here? 1 guest(s)
 Print Thread
Info on DC motor power of poppers
tnakir
Any of you guys know what is the power rating of the DC motor of Severin Popper (220V)?

I am about to separate the motor from the heating coil circuit and I don't know what AC > DC converter to get. I have some 24V 0.8A PSU, and I'm not sure it will be powerfull enough.
 
renatoa
Is not enough, you need a 2A source.
These are usually clones of Johnson/Mabuchi RS385 motors, whose specs state 0.4-0.5A current, but without specifying which regime.
Looking into the datasheet we see this current is for maximum efficiency case, which is a very small load regime, compared with the popper scenario.
Tried 1A source to power such motor, from a Zilan popper, and voltage dropped to 19V from 24, so I guess some kind of over-current protection kicked.
 
starbuxed
renatoa wrote:

Is not enough, you need a 2A source.


So would a 24V 2A Power supply work? or is a 24V 5A power supply a better choice?
 
greencardigan
I used to use a laptop power supply that had a voltage switch for various voltages between 15 and 24 volts.
 
ChicagoJohn
On a 120VAC popper mod I did, I used a 24VAC transformer with input from a rotary dimmer switch output through a full wave bridge rectifier, unfiltered. (I wound up operating it at full power so the dimmer switch wasn't necessary, controlling heating with PWM). That transformer got way too hot and I wound up using a 50VA transformer which got hot but remained within acceptable maximum temperature limits. I have no familiarity at all with 240VAC systems, but if the popper designs are otherwise similar, I would think 2A continuous is probably marginally adequate with the caveat that I've seen some instances in which manufacturers state current ratings for transformers that a are significantly higher than they can deliver continuously..
So many beans; so little time....
 
renatoa
If you have doubts about a transformer, weigh it, a real 50W transformer for industrial use, i.e. continuous operation at maximum 75 C degrees, should be in the 900 g ballpark.
 
Wiz Kalita
I'm using this popper. It's a 20V motor that draws 2A, and I'm driving it with a 20V 3.25A laptop PSU.
 
tnakir
Did you leave both heat coils connected in series? Just disconnected the motor?
 
Wiz Kalita
I removed all the electronics and connected it to a CR3 setup. I don't remember if I left both coils or how I wired them.
 
tag1260
What happens if you just disconnect the motor from the coils? Do you still run both coils or does it create a problem?
 
renatoa
No problems.
In the parallel configuration heater power is reduced by about 200W on 230V or 100W on 110V.
 
tag1260
Thanks. I just yesterday split my motor and heater and was wondering if it were a problem. Tried my first batch today and it worked great but I will have to practice my control.

Thanks again
 
Jump to Forum:

Similar Threads

Thread Forum Replies Last Post
Info On Centrifugal Roasters??? Building a Coffee Roaster 119 03/30/2019 3:42 AM
Main Power Supply Electric and Gas Heat Sources 3 03/27/2019 3:22 AM
Vac Motor Armature Fix (?) Building a Coffee Roaster 16 03/23/2019 8:50 AM
Simple, bigger, better, faster, SC/TO high torque motor replacement for ~$35 Turbo Oven Roasters 22 03/09/2019 9:19 PM
DC motor speed control and over current protection Drum Roasters 5 01/19/2019 4:04 PM
Homeroasters Association Logo, and all Content, Images, and Icons © 2005-2016 Homeroasters Association - Logos are the property of their respective owners.
Powered by PHP-Fusion Copyright © 2019 PHP-Fusion Inc
Released as free software without warranties under GNU Affero GPL v3
Designed with by NetriX