This is the setup I am looking at:
This 24 inch 48V / 52V 500W front hub motor electric bike conversion kit combines the full E-bike technology: direct drive Brushless Geared high torque hub Motor to change almost every bicycle into a personal electric bike. Save energy, protect environment and save money with a lot of fun.
Main Features:
>. Rim: 24 inch double wall Alloy (Rim Fit For: 24 × 1.5" / 1.75" / 1.95" tire)
>. Spoke: 12 gauge / 156 mm Length × 36 pcs
>. Engine: Bldc hub motor -- Brushless Geared
>>. Voltage: 48V / 52V
>>. Power: 500W
>>. Efficiency: 78%
>>. Max speed: 28.9 kmh -- 17.8 mph
>>. Mechanical brake: Disk or V
>>. Cable location: shaft end , RIGHT
>>. Cable length:160cm / 63"
>>. Install: spacing of 100mm fork
>>. Noise: < 60 db
>>. Surface: Bright silver
>. Driver: brushless controller
>>. MOSFET: 6 PCS
>>. With LCD: YES
>>. Rated Voltage: DC 48 / 52 Volts
>>. Min. Voltage: DC 40 ± 0.5 V
>>. Rated power: 500 Watts
>>. Casing material: aluminium
>>. Maximum Current: 16 A ± 1 Amps
>>. Thermal: aluminum shell and the substrate
>>. 3 phase 120° brushless motor
>>. Operating Conditions: -20~45 °C
>>. Waterproof design
>>. Size: 95 mm L × 61 mm W × 35 mm H
LCD-003, More Function:
* Cruise
* Reverse (The motor does not support the reversal)
* Regen brake
* Kmh / mph
* Set Max speed ( 0 ~ 72 kmh / 45 mph )
* Pedal assist ( 1 - 5 )
* ...
Package Content:
1 x 24 inch 48V / 52V 500W front bldc hub motor wheel
1 x 48V / 52V 6-MOSFET motor controller
1 x LCD-003 ( display speed, mileage, battery gauge.. )
1 x Twist throttle
1 x Brake lever
1 x Three button switches
1 x Pedal assist
Net weight: 5.93 kg / 13 lbs
Package Size: 62cm L x 22cm W x 61cm H / 24.4" L x 8.7" W x 24" H
Package Type: Cardboard Box
markz said:
Its best to get a battery that is 48V or 52V and 40A and get a controller that is 48V or 52V and 25A then if that is not enough you can always get another cheap controller that is 35 or 40A. It'd be not good to go the other way around, buy a 48/52V 20A battery and buy a 48/52V 30A controller even if the battery has a BMS. The battery is expensive but you can always get more power cheaply by changing the cheap controller.
EarlB said:
I feel like I have learned enough in just the last couple weeks to become dangerous. I have everything lined up, but one critical question has question risen. Will a 500 watt 48/52 volt hub rated at 17 mph max and 17 amp max(no reverse) with a 52 volt 20 amp battery serve me just as well as a 1500 watt hub with the same battery? Will the 500 watt hub put less stress on my fork than the 1500 watt hub?
Chalo said:
EarlB said:
Miami Sun Trike. I want 20 mph, slightly plus. I may never ride it that fast, but I want it available.
I've worked on a whole lot of trikes, and believe me when I tell you-- you really don't want to go that fast, ever, on a granny trike. They get very treacherous and you will hurt yourself. Your Helix doesn't twist itself up like a granny trike and try to flip over, so it's not a good basis of comparison. You are at an age and state of health where you're no longer allowed to pile into the ground that hard.
15 mph is plenty on a granny trike. It's like the 30 mph of trikes. You'll still have to be very careful, because the trike still wants to put you on your head at that speed. The good news is that for any given amount of electric power, the trike will accelerate and climb harder the lower its top speed is. Also, your battery will take you a lot farther at a lower speed.
The Leaf 1500W is a great kit; I use a front one on my own 29" bike. One of its best features in your case is that you can get whatever winding you want at no extra cost, to give you the correct motor RPM per volt for what you're doing. Because RPM per volt and torque per amp trade off against each other directly, getting just enough RPM per volt will maximize the amount of torque you have available from the stock controller.
The unloaded motor speed needs to be about 1.25 times your desired top speed in a case like this where there's an abundance of power. So that means you're looking at an unloaded speed of about 260 RPM for a 24 inch wheel, or 240 RPM if you're using a 26 inch wheel. Leaf will set you up with the most appropriate winding if you tell them what unloaded RPM you want. It will probably be a 9 turn armature if you're using a 48 volt battery.