AmpFlow high-performance A28 motors are designed to give the highest level of performance possible in a brushed DC motor. This is achieved by advanced design and the use of neodymium rare-earth magnet material.

 

On Sale! Fan-cooled A28 motors are designed for applications that require longer duty cycles and even higher power outputs. Low profile leads enable more compact installations. Available for 24V and 48V.

 
High-Performance Electric Motors  
The mid-range F30 motors are designed for the highest performance and efficiency while still using the less expensive ferrite magnets.  

The economy E30 motors are designed to give good performance at the lowest possible price.

 

All motors on this page are available with the optional AmpFlow speed reducer.

We stock all the motors on this page. Custom motors are also available with a minimum order of 24 units.

 

Type High-Performance Economy Motors
Voltage Range 6 Volts to 18 Volts 12 Volts to 36 Volts 24 Volts to 72 Volts
Model E30-400-12 E30-150-12 E30-400-24 E30-150-24 E30-400-48 E30-150-48
Diameter (inches) 3.1 3.1 3.1 3.1 3.1 3.1
Length (inches) 5.8 4.0 5.8 4.0 5.8 4.0
Peak HP 1.6 0.7 2.1 1.0 2.7 1.1
Stall Torque (oz-in) 970 450 1500 710 1860 750
Efficiency 78% 71% 79% 76% 82% 77%
Nominal Voltage* 12V* 12V* 24V* 24V* 48V* 48V*
RPM at Nominal Voltage 6500 5900 5700 5600 5800 5600
Shaft Dia. (inches) 1/2 1/2 1/2 1/2 1/2 1/2
Shaft Length (inches) 2.0 2.0 2.0 2.0 2.0 2.0
Keyway (inches) 1/8 1/8 1/8 1/8 1/8 1/8
Capacitors No No No No No No
Magnet Type Ferrite Ferrite Ferrite Ferrite Ferrite Ferrite
No Load Amps 5.5 4.4 3.2 2.1 1.4 1.0
Resistance (Ohms) 0.030 0.069 0.089 0.190 0.284 0.708
Kt (oz-in/Amp) 2.46 2.68 5.63 5.70 11.1 11.4
Kv (RPM/Volt) 549 504 240 237 122 118
Weight (pounds) 5.9 3.6 5.9 3.6 5.9 3.6
Price $109 $79 $109 $79 $109 $79
Pictures
Drawings
Performance Charts
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Type High-Performance Mid-Range
Model A28-400 A28-150 F30-400 F30-150
Diameter (inches) 3.0 3.0 3.1 3.1
Length (inches) 6.7 4.0 6.7 4.0
Peak HP 4.3 3.0 2.5 2.3
Stall Torque (oz-in) 3560 1950 2240 1370
Efficiency 83% 80% 84% 82%
Nominal Voltage* 24V* 24V* 24V* 24V*
RPM @ 24V 4900 6100 4500 6900
Shaft Dia. (inches) 1/2 1/2 1/2 1/2
Shaft Length (inches) 2.0 2.0 2.0 2.0
Keyway (inches) 1/8 1/8 1/8 1/8
Capacitors Yes Yes Yes Yes
Magnet Type Neodymium Neodymium Ferrite Ferrite
No Load Amps 4.4 4.4 2.1 2.5
Resistance (Ohms) 0.044 0.064 0.076 0.081
Kt (oz-in/Amp) 6.58 5.26 7.17 4.66
Kv (RPM/Volt) 205 257 189 287
Weight (pounds) 6.9 3.8 8.3 4.7
Price $449 $344 $289 $239
Pictures
Drawings
Performance Charts
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* The above specifications are for the motor's nominal voltage. The motors can also be used at lower or higher voltages. The RPM is proportional to the voltage, so running at half the nominal voltage will result in half the speed, and twice the voltage will double the speed. The maximum achievable torque is also proportional to the voltage. Shorter duty-cycles are recommended for higher voltages to allow the motors time to cool. Please note that the above torque figures are the theoretical peak torques when stalled. Operating any high-performance motor while stalled will damage it.

 

On Sale! Fan-cooled motors

Type Fan Cooled  24V Fan Cooled 48V
Model A28-400-F24 A28-150-F24 A28-400-F48 A28-150-F48
Diameter (inches) 3.0 3.0 3.0 3.0
Length (inches) 7.8 5.1 7.8 5.1
Peak HP 4.3 3.0 11.5* 4.6
Stall Torque (oz-in) 3560 1950 7260** 2500
Efficiency 83% 80% 85% 82%
Nominal Voltage 24V 24V 48V 48V
RPM at Nominal Voltage 4900 6100 6400 7400
Shaft Dia. (inches) 1/2 1/2 1/2 1/2
Shaft Length (inches) 2.0 2.0 2.0 2.0
Keyway (inches) 1/8 1/8 1/8 1/8
Capacitors Yes Yes Yes Yes
Magnet Type Neodymium Neodymium Neodymium Neodymium
No Load Amps 4.4 4.4 4.4 2.5
Resistance (Ohms) 0.044 0.064 0.066 .165
Kt (oz-in/Amp) 6.58 5.26 10.05 8.70
Kv (RPM/Volt) 205 257 135 156
Weight (pounds) 7.2 4.0 7.3 4.0
Price $499 $459 $394 $499 $419 $394 $334
Pictures
Drawings
Performance Charts
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The fan-motors have ventilation holes in the front and rear aluminum plates to allow for flow-through cooling. The holes in the front plate are positioned so they are not blocked when mounting the motor to a flat surface. These motors also feature low-profile motor leads for better fit into smaller spaces.

* Theoretical peak power is 11.5 HP. Power at the recommended short-term current limit of 200A is 9.1 HP.
** The current required to reach 7260 oz-in is far outside the safe operating limits of this motor. This figure is theoretical and should be used for comparative purposes only.

 

 

VEX High-Voltage Motor Controller

 

We recommend using the IFI VEX 48V motor speed controller with our 48-volt motors. Visit this page for more details.

 

 

 

 

 

Efficiency

Getting high efficiency from a low-voltage motor is not easy. There are many factors that effect efficiency. We have optimized each of these factors to achieve very high efficiency in these motors.

Type High-Performance Economy Motors
Voltage Range 6 Volts to 18 Volts 12 Volts to 36 Volts 24 Volts to 72 Volts
Model E30-400-12 E30-150-12 E30-400-24 E30-150-24 E30-400-48 E30-150-48
Peak Efficiency (PE) 78% 71% 79% 76% 82% 77%
RPM at PE 5800 5100 5100 5000 5300 5000
Torque at PE (oz-in) 105 63 145 85 150 80
Horsepower at PE 0.60 HP 0.32 HP 0.75 HP 0.40 HP 0.80 HP 0.40 HP
Current at PE 48 Amps 28 Amps 29 Amps 17 Amps 15 Amps 8 Amps
HP Range for 75%+ Efficiency 0.4 to 0.9 N/A 0.4 to 1.3 0.3 to 0.5 0.3 to 1.8 0.3 to 0.6

 

Type High-Performance Mid-Range
Model A28-400 A28-150 F30-400 F30-150
Peak Efficiency (PE) 83% 80% 84% 82%
RPM at PE 4500 5500 4200 6300
Torque at PE (oz-in) 300 190 170 120
Horsepower at PE 1.3 HP 1.0 HP 0.71 HP 0.74 HP
Current at PE 50 Amps 40 Amps 26 Amps 28 Amps
HP Range for 75%+ Efficiency 0.5 to 2.9 0.5 to 1.8 0.2 to 1.7 0.3 to 1.6

 

Type Fan Cooled  24V Fan Cooled 48V  
Model A28-400-F24 A28-150-F24 A28-400-F48 A28-150-F48
Peak Efficiency (PE) 83% 80% 85% 82%
RPM at PE 4500 5500 6000 6750
Torque at PE (oz-in) 300 190 510 220
Horsepower at PE 1.3 HP 1.0 HP 3.0 HP 1.5 HP
Current at PE 50 Amps 40 Amps 55 Amps 28 Amps
HP Range for 75%+ Efficiency 0.5 to 2.9 0.5 to 1.8 1.0 to 8.1 0.6 to 3.1

As you can see from the above charts, the efficiency of the motors is very high over a broad range of power.

 

 

Sprockets and Keys


 

The 1/2-inch bore of our standard sprocket fits all our 3-inch motors.

The sprocket has 9 teeth and it works with #35 roller chain. It comes with a 1/8-inch key.

Sprocket - $14      Quantity

 

 

Applications

AmpFlow motors are popular choice in applications like:

  • Cablecams
  • POV Camera Rigs
  • Zipline Cameras
  • Automatic Guided Vehicles (AGV)
  • Hazardous Material Handling Robots
  • Personal Transport Systems
  • Underwater Remote Operated Vehicle
  • Remote Exploration Robots
  • Telepresence systems
  • Robot Sports
  • Police/Law Enforcement Robots
  • Surveillance Robots
  • Bomb and Mine Removal Robots
  • Animatronics
  • Model cars and model boats
  •  

     

    Our pancake motors or standard motors are typically used in motorized bicycles and scooters.

     

    Here are our recommendations regarding the selection of a proper reduction ratio.

    Warranty
    The motors are warranted to be free from manufacturing defects, and fully operational when you receive them. AmpFlow gives no other warranty, either expressed or implied. Warranties are not transferable. In no event shall AmpFlow's liability exceed the buyer's purchase price, nor shall AmpFlow be liable for any indirect or consequential damages.

    Ordering
    Shipments must be to a street address; we can not ship to a PO Box. Please allow 7-10 days for orders shipped by UPS ground, 3-4 days for orders shipped by 2nd day air, and up to 14 days for international orders.

     

      We accept Visa, MasterCard, and PayPal.

    Replacement fans and brushes are available here

    Contact us for custom motors and volume pricing.

     

     

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