hi, folks,
i am in a process of making 2-e-wheels (direct-drive hub motors) trailer, with solar panels for battery charging.
basic idea is to travel the world, incl. bumpy roads in the middle of nowhere, and playing some music on the street, plus much more ...
planned overall weight of trailer (musical instruments, mini guitar amplifier, water, food, tent, laptop, clothes etc.) is
55 kg (122 pounds), trailer steel frame aprox.
30 kg (66 pounds), 1 e-wheel (golden motors EDGE VEC INT 48 V 22 A 5.3.1) is 7,5 kg, therefore
15 kg (33 pounds) for both e-wheels, batteries aprox.
10 kg (22 pounds), 4 pcs. solar panel (3x110 + 1x50 W)
8 kg (18 pounds), electronics and outer sides
10 kg (22 pounds), all together
125 kg (276 pounds), add +/- 20 kg (44 pounds)
150 kg (331 pounds)
Q1 - which steel profile should i use for main frame ?
currently i planned 20x20x2 mm (0.7874016 x 0.7874016 x 0.07874016) square steel frame, since the tow vehicle is pedal trike with male Caucasian motor (me, lol), i want frame to be as light as possible.
on the below scheme, only lower part of frame carries a load, and it also holds both motors in place. upper part (outer sides of trailer) will be lightweight custom 'plastic sandwich', and solar panels, all together not much (approx. 10, max 15 kg (33pounds)). for the bottom i shall probably use laminated wooden plank, 10 mm (0.3937008 inch).
welding will be done by me.
Q2 - where should i put center of gravity ? current options:
a) center of the frame box
b) 100 mm (3.937008 inch) behind the center of the frame box
not sure about this, since:
c) batteries and MPPT plus more electronics (aprox. 15 kg) will be in front of the trailer (separate triangular space)
d) i can always rotate the cargo so all the needed weight shall be in front
i do know that weight of any trailer must be in front, on the tow hook, or else the hook will lift back wheel/s, which spells 'accident'.
important here is the fact, that trailer, with 2 x 1000 W e-motors, will push the tow vehicle (ice sprint trike) uphills, as a help for climbing the hills.
since i have some more questions, regarding wiring of solar panels and boost charge controllers and batteries,
Q3 - should i put additional questions into this topic (probably best to keep relevant info in one thread), when time comes, or open another thread ?
thank you very much for your input,
best regards,
have fun,
aum
s love nia
PS - i put same thread on Slovenian engineering forum, 0 replies in a week. so, you, ladies and gentlemen, are my only chance
i am in a process of making 2-e-wheels (direct-drive hub motors) trailer, with solar panels for battery charging.
basic idea is to travel the world, incl. bumpy roads in the middle of nowhere, and playing some music on the street, plus much more ...
planned overall weight of trailer (musical instruments, mini guitar amplifier, water, food, tent, laptop, clothes etc.) is
55 kg (122 pounds), trailer steel frame aprox.
30 kg (66 pounds), 1 e-wheel (golden motors EDGE VEC INT 48 V 22 A 5.3.1) is 7,5 kg, therefore
15 kg (33 pounds) for both e-wheels, batteries aprox.
10 kg (22 pounds), 4 pcs. solar panel (3x110 + 1x50 W)
8 kg (18 pounds), electronics and outer sides
10 kg (22 pounds), all together
125 kg (276 pounds), add +/- 20 kg (44 pounds)
150 kg (331 pounds)
Q1 - which steel profile should i use for main frame ?
currently i planned 20x20x2 mm (0.7874016 x 0.7874016 x 0.07874016) square steel frame, since the tow vehicle is pedal trike with male Caucasian motor (me, lol), i want frame to be as light as possible.
on the below scheme, only lower part of frame carries a load, and it also holds both motors in place. upper part (outer sides of trailer) will be lightweight custom 'plastic sandwich', and solar panels, all together not much (approx. 10, max 15 kg (33pounds)). for the bottom i shall probably use laminated wooden plank, 10 mm (0.3937008 inch).
welding will be done by me.
Q2 - where should i put center of gravity ? current options:
a) center of the frame box
b) 100 mm (3.937008 inch) behind the center of the frame box
not sure about this, since:
c) batteries and MPPT plus more electronics (aprox. 15 kg) will be in front of the trailer (separate triangular space)
d) i can always rotate the cargo so all the needed weight shall be in front
i do know that weight of any trailer must be in front, on the tow hook, or else the hook will lift back wheel/s, which spells 'accident'.
important here is the fact, that trailer, with 2 x 1000 W e-motors, will push the tow vehicle (ice sprint trike) uphills, as a help for climbing the hills.
since i have some more questions, regarding wiring of solar panels and boost charge controllers and batteries,
Q3 - should i put additional questions into this topic (probably best to keep relevant info in one thread), when time comes, or open another thread ?
thank you very much for your input,
best regards,
have fun,
aum
s love nia
PS - i put same thread on Slovenian engineering forum, 0 replies in a week. so, you, ladies and gentlemen, are my only chance