roller-dat
honda roller
brushed motor 775
Engineering Check: Scooter with Dual 775 Motors
1. Power Output
- Single 775 (24V): ~150W Peak.
- Dual Setup: ~300W Total.
- Requirement: This is the minimum required to move an adult. Expect slow acceleration.
2. Transmission Requirements
Since 775 motors are high-speed/low-torque, a gear reduction is mandatory:
- Ratio: 10:1 (Speed) to 20:1 (Torque).
- Mechanism: #25 Chain or HTD-5M Belts are best for "Rover" style DIY builds.
3. Critical Risks
- Heat: Brushed motors dissipate heat poorly. Extended rides (>10 mins) may damage the motors.
- Starting Torque: You may need to "kick-start" the scooter manually to help the motors overcome the initial stall current.
4. Better Alternatives
If your budget allows, a Brushless DC (BLDC) Hoverboard Motor is much better for carrying humans. They have internal Hall sensors and much higher torque without needing gears.
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