Hello,for you guys that are looking for large BLDC Brushless Motor ... data sheet coming soon for regular & halbach array version OEM welcome!
this might be the motivation to get back to my super cub project !
going to need that data sheet
cool to hear that , working on data sheet coming soon.
What's up with the unit conversion errors? 50kw is 67 hp. 150 hp is 112kW. Or is it 150hp max, and 50kW max continuous or something?
for example or older smaller motor specs at 40kw
Any kv not higher than 80KV (35, 55, 80)
Large scale 40kw Brushless out runner motor for plane
The spec as following:
MOTOR: S-154120 KV55
KV: 25, 35 ,55, 80
MAX POWER: 45KW-50KW
WIRE WINDS:
MAX AMP: 500A
ESC: 400A/500A
MAX VOLT: 120V
NO LOAD CURRENT(20v testing voltage): 7A
RESISTANCE (mOhm): .140
SIZE: 154 x 115.54( without shaft )
Stator: 135*50mm
WEIGHT (kg): 5.9
SHAFT: 15mm Accessory pack: Yes
Internal PCB with 120 degree hall effect sensors
for example 5KW 96V Liquid Cooling High Power BLDC Motor the specs are for a motor 1/10 the power & rated around 60bhp.
Voltage:48V/72V/96V/120V
Rated Power:3KW-7.5KW
Efficeincy: 91%
Phase Resistance (Milliohm): 6.2/48V; 12.0/72V; 36.0/120V
Phase Induction(100KHZ): 68uH/48V; 154uH/72V; 504uH/120v Speed: 2000-6000rpm (customizable)
Weight:11Kg(air),11.35kg(water); Casing: Aluminium
Length (height): 126mm Diameter: 206mm
Keyway size: 5mm(W) x 43mm(L) x 19mm(D:22.3mm)
Actually OG, I am pretty sure KW translates directly to horse power at least KW minus efficiency (heat) losses does.
And you are claiming twice the HP possible for a 100 percent efficient motor at the KW shown.
Lately it has become popular on vacuum cleaners and power tools and the like to completely fudge horsepower values with something called "maximum developed horse power".
I'm not really sure what it is but they are claiming 3 or 4 horsepower or more from appliances that plug into a 15 or 20 amp 110 volt AC circuit.
Maximum possible horsepower from a 20 amp 110 volt circuit is actually approximately 2 hp and then only if 100 percent efficient.
Watts actually combine voltage and current and represent power so variance in rpm or voltage is actually irrelevant as far as maximum power (KW or HP) is concerned except as caused by reductions in efficiency in the KWs generating the HPs.
Best Regards,
Gary
PS Brushless motors are magic, but not so magic that they can produce twice the shaft horsepower of the provided kilowatts.
Hi OG,
I am absolutely not disputing the formula you have provided as scientific measure horsepower is exactly equivalent to watts at the ratio you quote.
And at that ratio, 50KW is equivalent to 67.0511 hp.
And that does assume for an actual application (a specific motor) that it is operating at 100% efficiency with no mechanical, magnetic, heat or other design losses.
EG: there is no way a 50 KW motor can produce 150 horse power.
If it is a "perfect" motor it can produce a maximum of 67.0511 horse power and not a thousandth of a horsepower more.
And there are no "perfect" motors.
Matthew R's response above is totally correct.
And 20 amps at 110 volts = 2.95 hp at 100% efficiency (power factor of 1), but reality is most motors or motors plus speed controls seldom achieve better than about 80 percent efficiency so 2 hp is the maximum motor recommended for a 20 amp 110 volt AC service and normally drawing more mechanical HP than that will result in tripping the 20 amp breaker.
Unless I have missed something.
Similar symbol, different meaning.
I'd guess the author has simply swapped KV (kiloVolts/RPM) with KW (KiloWatts)
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