jskounakis
1 mW
- Joined
- Jan 25, 2022
- Messages
- 17
Hello there,
tl;dr: Making an electric catamaran boat, can't decide on the motor, power/weight ratio, and controllability of RPM and Torque as a pair puzzles me.
This is my first post after lurking for a while in your forum, trying to troubleshoot and learn about EVs and general electronics.
[so if this is the wrong place for the post tell me and I'll post it where I should]
I am part of a student team from Greece taking part in the Monaco Energy Boat Challenge with an electrically powered Catamaran. This is basically how our vessel looks.
-Technical Details-
And here comes the challenge: I've researched an immense amount of motor manufacturers and can't seem to find the right one.
Here you can find a rough list of the most appropriate motors I've found. For the controller we've picked a VESC 75/300 in hopes that it will run whatever you'll throw at it.
Issue #1
How can this world have motors like Heinzman PMS120W as well as Torqstar 7050. LMT packs 10+kW in 2kg at a lower price and weight than Heinzmann. I'm guessing torque is a big part of why, which brings me to
Issue #2
Is it wise to grab an LMT motor with higher windings ending up with less kV = less RPM and higher Torque? Or would it be wiser to go for something in between like Motenergy ME1803?
Issue #3
Is it even worth it to look at something like Benevelli SMAC 200-052 [Datasheet] since it's 24KG and with similar specs to the ones mentioned above? Do you have any input on the manufacturer - I haven't had much luck on the internet/other forums.
Issue #4
Lastly, I've come across Plettenberg NOVA 15 which seems to run between 2K and 8K RPM and 30Nm Torque. Obviously, we'd be using a reducer (1:3 or 1:4) but our biggest issue is regarding just that: How controllable is an electric motor, with a reduction of 1:3, for example, would we be able to run at around 1500 RPM and 50Nm? How controllable are speed and torque as a pair?
Thanks in advance for any replies, we are eager to document our progress, trying to help others who are interested in similar projects.
tl;dr: Making an electric catamaran boat, can't decide on the motor, power/weight ratio, and controllability of RPM and Torque as a pair puzzles me.
This is my first post after lurking for a while in your forum, trying to troubleshoot and learn about EVs and general electronics.
[so if this is the wrong place for the post tell me and I'll post it where I should]
I am part of a student team from Greece taking part in the Monaco Energy Boat Challenge with an electrically powered Catamaran. This is basically how our vessel looks.
-Technical Details-
- 10kWh Battery 100Ah 52V [2 x packs of 14S36P Panasonic NCR18650 Li-Ion]
- approx 250 kg
- approx 650N drag for 10m/s which results in 6.5kw needed thrust (propeller) and about 8.5kW on motor
- Delivered power to propeller ~50Nm@1300RPM (known data for 7.2m/s)
- 3 hour runtime needed for the endurance race [S1 duty, thus water-cooled motor (?)]
And here comes the challenge: I've researched an immense amount of motor manufacturers and can't seem to find the right one.
Here you can find a rough list of the most appropriate motors I've found. For the controller we've picked a VESC 75/300 in hopes that it will run whatever you'll throw at it.
Issue #1
How can this world have motors like Heinzman PMS120W as well as Torqstar 7050. LMT packs 10+kW in 2kg at a lower price and weight than Heinzmann. I'm guessing torque is a big part of why, which brings me to
Issue #2
Is it wise to grab an LMT motor with higher windings ending up with less kV = less RPM and higher Torque? Or would it be wiser to go for something in between like Motenergy ME1803?
Issue #3
Is it even worth it to look at something like Benevelli SMAC 200-052 [Datasheet] since it's 24KG and with similar specs to the ones mentioned above? Do you have any input on the manufacturer - I haven't had much luck on the internet/other forums.
Issue #4
Lastly, I've come across Plettenberg NOVA 15 which seems to run between 2K and 8K RPM and 30Nm Torque. Obviously, we'd be using a reducer (1:3 or 1:4) but our biggest issue is regarding just that: How controllable is an electric motor, with a reduction of 1:3, for example, would we be able to run at around 1500 RPM and 50Nm? How controllable are speed and torque as a pair?
Thanks in advance for any replies, we are eager to document our progress, trying to help others who are interested in similar projects.