Hub Motors Specification Sheets
Below are links to the specifications sheets to each style of Hub Motor.
Multi-Tug Owner's Manual
Wheelchair Assist Owner's Manual
Hub Motor, Brake, Manual Release
Hub Motors with Electrically / Manually Released Brakes, see the "Manual Release Lever Operation" Sheet.
Manual Release Lever Operation.pdf
Hub Motor, Tire, 8" Pneumatic
In the development of the 280-1342M hub motor, we looked at the use of a pneumatic tire. We found that if a standard scooter tire were to be used that the tire rim diameter required needed to be greater than 6.25”, this would give us a tire diameter of about 12”. A problem was also found in the location of the valve stem. We then developed the 280-1369M hub motor. By using a bicycle pneumatic tire, we were able to use a standard pneumatic tire and exit the valve stem.
Hub Motor, Controller, Rapid forward to reverse
Every application is different and many factors can come into play. The Xti hub motors have been used in application with as little as ½ second deceleration and ½ second acceleration from full throttle.
Hub Motor, Brake - Non-rotating use only
The internal brake is designed as a parking brake (non-rotating) and is not intended for the purpose of showing the hub motors rotation.
Hub Motor, Controller, Electric Braking
To understand the electric breaking of a PWM motor controller you need to look at both the acceleration and deceleration sequences. The follow is a simplified example.
Acceleration – When the throttle is moving from home position, the controller:
1. Activates the electrically released parking brake.
2. Accelerates the PWM pulse at a rate/time interval setting in the controller.
a. If the acceleration rate/time interval is set too short, damage to the hub motor may occur. A symptom would be jerky acceleration.
3. Accelerates to the percentage of full on pulse indicated by the position of the throttle and/or the maximum percentage of full on pulse set in the controller.
Deceleration - When the throttle is returned to its home position, the controller:
1. Decelerates the PWM pulse at a rate/time interval setting in the controller to zero pulse output.
a. If the deceleration rate/time interval is set to short, damage to the hub motor may occur. A symptom would be jerky stopping
2. Actives the regenerative circuit, sending the inertia generated current into the batteries.
3. If the throttle as been moved from its home position, the controller jumps back to “Acceleration step 2“.
4. If the throttle remains at its home position the controller deactivates the electrically released parking brake at a time interval setting in the controller.
a. If the brake is deactivation before the hub motor as become static (non-rotating), damage to the brake may occur. A symptom would be a sudden stop.
Hub Motor, Water/Dust Resistant
The XTi Hub Motors are water/dust resistant i.e.: rain/wet floor & road/floor dust, but not against full submergence.
Hub Motor, Motor Running at an Higher DC Voltage
The XTi Hub Motors can be operated at a higher than rated DC voltage to the motor, this will decreases the motor life due to accelerated brush ware. Hub Motors with the electrically released brake do require the brake coil be activated with the rated DC voltage.
Hub Motor, Encoder
The XTi Hub Motors have been used in robotics applications with the use of an encoder. We have not received information on how the encoder was installed, just that it can be done.
Hub Motor, Replacement of components
Due to the compact design of the hub motor the replacement of components will require a technician to perform the replacement. The hub shell is relatively easy to replace, but a technician can replace the motor, motor brushes, brake pad and gears.
See: Tire Shell Replacement.pdf
Hub Motor, Customization
We look at customizing the XTi Hub Motors on a case-by-case basis. Send us your ideas/needs and we will take a look at the changes and cost required.
Hub Motor, Continuous Duty
The continuous duty of our hub motors is 10 amps at the rated voltage; the hub motors can operate at higher amps but only for a sort time before thermal damage.
Battery, Material Safety Data Sheet MSDS
See: Power Sonic MSDS.pdf
Battery, Used On Side
The manufacture of your batteries states that the batteries can be stored and used laying on it's side with the battery post up.
Battery, Calculate Ah Size
To calculate the battery Ah size (example be low is given for a 24vdc system).
1. Put a timer on the hub motor or the controller to get “Run Time”.
2. Put a Amp meter on a battery lead to get your “Average Amps”
3. Run your unit though a few use cycles. “Cycle Time”.
4. The results may look something like the following:
a. Average Amps = 3Amp
b. Cycle time = 10 min., Run Time = 7min., Operation Day = 12hrs.
i. 7 min. / 10 min. = .7
ii. 12 hrs * .7 = Total Run Time 8.4 hrs
5. Battery Ah Required.
a. 8.4 hrs * 3Amp = 25.2Ah
b. 25.2Ah / .8 (80% of battery Ah) = 31.5 Ah Required.
6. Two 12vdc, 35Ah batteries connected in series would give you 24VDC, 35Ah.