recumpence
1 GW
Hey Guys,
Here are pictures of my new motor. This is not a one-off motor. I plan on puting these into production once fully developed.
Here are the specs;
Can length--- 4.5 inches
Can diameter--- 3.75 inches
Shaft diameter--- 1/2 inch (keyway shafts will be used)
Expected efficiency--- 94% (more on this later)
Continuous power--- 14kw
Burst power--- 25kw
Weight--- Under 7 pounds (expected)
Here is the story on this motor project;
About 4 months ago I approached Astro Flight to manufacture a 4.5 inch diameter motor to my specs. They already have experience with motors of this size. However, this was looking to be a $50,000 proposition. Hmm, that went by the way-side while I organized the group motor buy for 3210 and 3220 motors. At that point, my group buy sold out all of Astro's cans. Also, I have been ordering more motors than they can keep up manufacturing. So, we entered into an agreement to manufacture their cans. Once that happened, I began talking to Bob from Astro about merely making a new motor using his existing 32 series laminations (the laminations are the expensive item to develop and manufacture). He was all for it! So, to that end, these new motors are completely new other than using Astro Flight's already proven laminations and rotor design. However, the only parts used from them is the rotor and laminations. Everything else is new. Also, this new motor uses a 3 inch lamination stack, rather than their largest 2 inch stack.
For those who understand Astro Flight's motors, these new motors of mine are essentially a 50% larger 3220. The lamination stack is 50% taller (3 inch instead of 2 inch). However, the differences are;
1/2 inch keyway shaft with large OD bearings (Astro uses smaller bearings in their 32 series motors when special ordered with 1/2 inch shafts). Modular can allowing the wiring to exit the face or rear plate of the motor. Larger mounting screws with farther spacing. This motor can be rewound because both end caps can be removed, unlike Astro's motors.
Basically, this is a radically redone and expanded Astro motor that we make 50% in-house and Astro winds and installs the laminations for me.
The 94% efficiency is a number Bob came up with based on the 3220 motors. Most of them peak at well over 94% efficiency. Also, this is essentially one and 1/2 3220 motors. As such, it should be good for 14kw without active cooling, or 20kw with fans (even more in short bursts). This motor is 1.5 times the power of a 3220 with 3 times the cooling surface area giving a net 50% increase in cooling area per lamination size versus the 3220.
Anyway, this is not a one time thing. I have plans to make many of these motors. I have two on my bench waiting to be wound. One is for John Holmes and the other is mine. Once these are wound a tested and proven, I will begin manufacturing. These two motors are shipping to Astro to be wound tomorrow.
Lastly, John will be doing some sensor research and fitting on his motor. Once he determines the ideal system for sensors, I will put sensor kits into production. For sensored motors, the rear plate will have slotted mounting holes to allow that plate to act as a timing adjustment for the sensor assembly.
I figure we are about 4 weeks away from having these motors in hand and running and another couple months to work out sensor details.
Oh, I expect the sensorless motor to be $950 while the sensored version will be more depending on the amount of work and additional parts required. This is a 50% increase in power over the 3220 with a 30% increase in price. And the quality is higher along with the durability using far larger bearings and shaft.
Here are some pictures next to a 3220 for comparision.
Matt
Here are pictures of my new motor. This is not a one-off motor. I plan on puting these into production once fully developed.
Here are the specs;
Can length--- 4.5 inches
Can diameter--- 3.75 inches
Shaft diameter--- 1/2 inch (keyway shafts will be used)
Expected efficiency--- 94% (more on this later)
Continuous power--- 14kw
Burst power--- 25kw
Weight--- Under 7 pounds (expected)
Here is the story on this motor project;
About 4 months ago I approached Astro Flight to manufacture a 4.5 inch diameter motor to my specs. They already have experience with motors of this size. However, this was looking to be a $50,000 proposition. Hmm, that went by the way-side while I organized the group motor buy for 3210 and 3220 motors. At that point, my group buy sold out all of Astro's cans. Also, I have been ordering more motors than they can keep up manufacturing. So, we entered into an agreement to manufacture their cans. Once that happened, I began talking to Bob from Astro about merely making a new motor using his existing 32 series laminations (the laminations are the expensive item to develop and manufacture). He was all for it! So, to that end, these new motors are completely new other than using Astro Flight's already proven laminations and rotor design. However, the only parts used from them is the rotor and laminations. Everything else is new. Also, this new motor uses a 3 inch lamination stack, rather than their largest 2 inch stack.
For those who understand Astro Flight's motors, these new motors of mine are essentially a 50% larger 3220. The lamination stack is 50% taller (3 inch instead of 2 inch). However, the differences are;
1/2 inch keyway shaft with large OD bearings (Astro uses smaller bearings in their 32 series motors when special ordered with 1/2 inch shafts). Modular can allowing the wiring to exit the face or rear plate of the motor. Larger mounting screws with farther spacing. This motor can be rewound because both end caps can be removed, unlike Astro's motors.
Basically, this is a radically redone and expanded Astro motor that we make 50% in-house and Astro winds and installs the laminations for me.
The 94% efficiency is a number Bob came up with based on the 3220 motors. Most of them peak at well over 94% efficiency. Also, this is essentially one and 1/2 3220 motors. As such, it should be good for 14kw without active cooling, or 20kw with fans (even more in short bursts). This motor is 1.5 times the power of a 3220 with 3 times the cooling surface area giving a net 50% increase in cooling area per lamination size versus the 3220.
Anyway, this is not a one time thing. I have plans to make many of these motors. I have two on my bench waiting to be wound. One is for John Holmes and the other is mine. Once these are wound a tested and proven, I will begin manufacturing. These two motors are shipping to Astro to be wound tomorrow.
Lastly, John will be doing some sensor research and fitting on his motor. Once he determines the ideal system for sensors, I will put sensor kits into production. For sensored motors, the rear plate will have slotted mounting holes to allow that plate to act as a timing adjustment for the sensor assembly.
I figure we are about 4 weeks away from having these motors in hand and running and another couple months to work out sensor details.
Oh, I expect the sensorless motor to be $950 while the sensored version will be more depending on the amount of work and additional parts required. This is a 50% increase in power over the 3220 with a 30% increase in price. And the quality is higher along with the durability using far larger bearings and shaft.
Here are some pictures next to a 3220 for comparision.
Matt