Get a hub motor

[EbikeMaui]

[

 

[eP]

SUMMARY:

Hub motor: Lots of power, but lower eff; easy-to-use package with no chocolate mess.

Etek: Lots of power, better eff; more difficult to install (DIY fabrication).


Could both be better? Yes.

Could both be worse? Oh yes.

Making a motor mount and putting a chain on to a sprocket saves breaking spokes,spinning axels and hall sensor wires,Making a torque arm,or breaking your front fork.Hub motors are NOT nearly efficient in all ranges and can make a bloody mess.Hub motors can go fast on the down hill of flats if you can make or modify the controller. Oh yes they can cause a BLOODY Mess.
IF there was a market for COMPLETE $2000. performance ebikes Heavy unefficient Hub motors may still be around for cheap troublesome kits.

So tell us what is the idlle current of yours etek ?
And what is its efficiency at .2 HP load ?

 

[EbikeMaui]

SUMMARY:

Hub motor: Lots of power, but lower eff; easy-to-use package with no chocolate mess.

Etek: Lots of power, better eff; more difficult to install (DIY fabrication).


Could both be better? Yes.

Could both be worse? Oh yes.

Making a motor mount and putting a chain on to a sprocket saves breaking spokes,spinning axels and hall sensor wires,Making a torque arm,or breaking your front fork.Hub motors are NOT nearly efficient in all ranges and can make a bloody mess.Hub motors can go fast on the down hill of flats if you can make or modify the controller. Oh yes they can cause a BLOODY Mess.
IF there was a market for COMPLETE $2000. performance ebikes Heavy unefficient Hub motors may still be around for cheap troublesome kits.

So tell us what is the idlle current of yours etek ?
And what is its efficiency at .2 HP load ?

No load WATTAGE to freespin the wheel at the same RPM is LESS THAN ANY CRYSTALYTE HUB MOTOR. Therefor the efficiency is HIGHER on the brushless etec at any speed along with MUCH more torque if needed.

 

[eP]

So tell us what is the idlle current of yours etek ?
And what is its efficiency at .2 HP load ?

No load current to freespin the wheel at the same RPM is LESS THAN ANY CRYSTALYTE HUB MOTOR. Therefor the efficiency is HIGHER on the brushless etec at any speed along with MUCH more torque if needed.

No, No no the same rpm, but for the Nominal voltage (nominal rpm) !!

So what is the etek's efficiency at 0.2 HP power output ?

 

[safe]

eP, the Etek and the PMG 132 are the "superstar" motors on the market. No one comes close to those motors in terms of power or efficiency.

The real life "racing crowd" uses them... they are as good as they get...

(and the PMG 132 costs $900+ so you get what you pay for)

However, if you have an application that only needs very small levels of power, like less than 2 hp, then those motors might be too big for that...

 

[eP]

However, if you have an application that only needs very small levels of power, like less than 2 hp, then those motors might be too big for that...

I know that motor's and theirs characteristics of efficiency but i ask Randy if he knows that as well :wink:

If the motor is highly efficient at wide loads range it is unlikeli be too big.
The weight is not the primary concern at this case.
The primary are idlle current and stator loss.

 

[EbikeMaui]

 

[eP]

However, if you have an application that only needs very small levels of power, like less than 2 hp, then those motors might be too big for that...

I know that motor's and theirs characteristics of efficiency but i ask Randy if he knows that as well :wink:

If the motor is highly efficient at wide loads range it is unlikeli be too big.
The weight is not the primary concern at this case.
The primary are idlle current and stator loss.

No load WATTAGE to freespin the wheel at the same RPM is LESS THAN ANY CRYSTALYTE HUB MOTOR. Therefor the efficiency is HIGHER on the brushless etec at any speed along with MUCH more torque if needed. At a hugher load than 500 watts the etcks efficiency rises as the Crystalytes motor efficiency goes down as you apply a larger load.

Hey man.
Have you any brain problems or you cannot understand a very simple question ???

You cannot compare No load Wattage at the same rpms if they have QUITE DIFFERENT nominal RPMs.

So you acting like a stupid troll now repeating again and again what is completely useless and false.

So what is etek's efficiency at 0.2 HP power_out ?

 

[EbikeMaui]

[Get A Grip.

 

[EbikeMaui]

 

[eP]

No load WATTAGE to freespin the wheel at the same RPM is LESS THAN ANY CRYSTALYTE HUB MOTOR. Therefor the efficiency is HIGHER on the brushless etec at any speed along with MUCH more torque if needed. At a hugher load than 500 watts the etcks efficiency rises as the Crystalytes motor efficiency goes down as you apply a larger load.

Hey man.
Have you any brain problems or you cannot understand a very simple question ???

You cannot compare No load Wattage at the same rpms if they have QUITE DIFFERENT nominal RPMs.

So you acting like a stupid troll now repeating again and again what is completely useless and false.

So what is etek's efficiency at 0.2 HP power_out ?

We only need to compare wheel RPM since the eteck to the wheel wattage is the measurement is what you need to compare.Or are :lol: you comparing apples to lemons again?

We only need to compare motor's nominal RPM since the eteck to the nominal voltage is the measurement is what you need to compare.

So tell us what is etek's nominal rpms at its nominal voltage ?
At light load the RPMs will be very close to idlle rpms (no load).
So it is depend on what is the etek's nominal voltage.
As a nominal voltage (at this case) you can assume the voltage the etek need to speed up the bike to 30 mph for example.

If you compare the same rpms at quite different Kv you get very low voltage (and quite useless) for the motor which have much higer Kv.
So this way you cannot compare aples to aples.

The only way is compare the loss at nominal rpms.

Do you understand above or you are going to act like a stupid troll as before ??

 

[CGameProgrammer]

Randy, it makes no sense to compare efficiencies at the same RPM if the Etek spins 10x faster than a hub motor.

 

[EbikeMaui]

 

[eP]

Randy, it makes no sense to compare efficiencies at the same RPM if the Etek spins 10x faster than a hub motor.

That's why I compare WHEEL RPM and WATTS OUT after the eteck is chain reduced. :lol:

So what is etek's efficiency at 0.2 HP power_out and 20 mph at wheel (at the top gear)?

 

[EbikeMaui]

 

[eP]

Randy, it makes no sense to compare efficiencies at the same RPM if the Etek spins 10x faster than a hub motor.

That's why I compare WHEEL RPM and WATTS OUT after the eteck is chain reduced. :lol:

So what is etek's efficiency at 0.2 HP power_out and 20 mph at wheel (at the top gear)?

What on earth are you talking about? Top Gear?

The highest gear if you have more than one.

 

[EbikeMaui]

 

[eP]

eP, the Etek and the PMG 132 are the "superstar" motors on the market. No one comes close to those motors in terms of power or efficiency.

The real life "racing crowd" uses them... they are as good as they get...

(and the PMG 132 costs $900+ so you get what you pay for)

However, if you have an application that only needs very small levels of power, like less than 2 hp, then those motors might be too big for that...

Compare the BRUSHLESS Etek to the WHEEL RPM/Wattage Out to a hub motor and you may be suprised.Espically above 500 watts.

So what's the etek efficiency at 0.2HP power_out ?
50% ?
40% ?
or even less ?

 

[EbikeMaui]

 

[EbikeMaui]

 

[eP]

So what is etek's efficiency at 0.2 HP power_out and 20 mph at wheel (at the top gear)?

What on earth are you talking about? Top Gear?

The highest gear if you have more than one.

Now why would I want or need a HIGH ratio ? :lol:

Because you would want the higest efficiency at lowest motor rpm (at very light load).

But i see you want act as a stupid troll instead.

 

[knoxie]

Stop this shit!!

 

[EbikeMaui]

 

[EbikeMaui]

 

[eP]

1 RPM of the wheel with 1 to 90 ft lbs of torque can be efficient! But not wiith any 22 lb ebike hub motor.

1 RPM it is 120 meters/hour at 26'' rim.
How much it could be efficient ??


Stop this shit!! Randy.
What is the efficiency at 0.2 HP ?