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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