Reply with QuoteWhats the lowest the voltage will dip to ?
Physically how big is the motor ?
Battry Operation
Hi
As anyone used a Viper drive on a battery driven application. It will be a 48 volt LiFePO4 battery pack the motor is rate 48 volts 14.45 continuous current no peak current is given. Continuous torque is 172 oz-in peak is 1250 oz-in. This application will have a good bit of regenerative braking as its position a load of up to 6000 lbs.
Donnie
Similar Threads:
Whats the lowest the voltage will dip to ?
Physically how big is the motor ?
It's my understand you do not want to drop voltage below 90% of operating voltage of a Lithium battery or you will damage the battery. So it that case were looking at about 43 volts.
Charging Voltage: 60-61 Volts
Charging Current: <5 Amps
Rated Discharging Amperage: 20 Amps
Max Continuous Discharging Amperage: 40 Amps
Maximum Discharging Current: 60 Amps
Discharging Cut-off Protection: 50 Amps
The motor is 394 continous watt motor They do not give a max Wattage. Below is a link to the motor.
http://www.midwestmotion.com/product...20GP81-079.pdf
Donnie
peak torque/torque constant = peak amps
1250/11.9 ~ 105A!
Matt
>>This application will have a good bit of regenerative braking as its position a load of up to 6000 lbs.
What is the application ? What load is causeing the big braking load ? If its for a vehicle, that requires a special design.
Larry
I'm quite sure 1250 oz-in peak torque would be insufficient for even the most sluggish 6000 lb vehicle.Originally Posted by Larken
Matt
Larry:
It is a vehile if that what you want to call it. It will be moving pallets in a deep rack storage system. Were looking at max of 6000 lbs but most of the time it will be more like 2000 Lbs.
Matt:
Add a 79 to 1 planetary gear box to that and your now at 592 In-lbs of torque continous torque. Not super accel or deccel but I'm not looking for that I just need to move the pallet and this whole system need to be under 5 inches tall.
Donnie
I make that 849 lb-in?
Operate above the continuous torque at your own risk, very easy to cook the motor at that current if the drive allows it.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
Al
Your correct on calculated torque, I was giving the manufactors Continous gear box output torque from there data sheet. This will not be running continous on top of that. If the hieght was not an issue I would go much larger on the motor 56c motors don't fit in a 4" window.
Donnie
Last edited by DonnieET; 02-09-2012 at 01:45 PM. Reason: Continous not peak torque
Larry
Please enlighten me on what makes a vehicle and why it needs a special design? I have to get the parts ordered in the next few week for this project. I'm needing to nail down the drives.
Donnie
Last edited by DonnieET; 02-13-2012 at 03:09 PM. Reason: mis typing.
