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searching brushless motor with sensors, 12V, 500-700Watt

W

Wolfgang

Jan 1, 1970
0
Hello,

I search for an application with very high torque request at zero
speed
a brushless motor with sensors. Parameters: 12V, 500-700Watt

Who can tell a manufacturer of such a motor?

Best regards

Wolfgang
 
J

Jamie

Jan 1, 1970
0
Wolfgang said:
Hello,

I search for an application with very high torque request at zero
speed
a brushless motor with sensors. Parameters: 12V, 500-700Watt

Who can tell a manufacturer of such a motor?

Best regards

Wolfgang

Look at stepper motors., they have a high torque rate of
holding how ever, they work in degree's/ indexes per turn. the more you
get the more expensive and at 700 Watts, that sounds very expensive.

On the second note how ever, they require no feed back.
 
J

John Barrett

Jan 1, 1970
0
Wolfgang said:
Hello,

I search for an application with very high torque request at zero
speed
a brushless motor with sensors. Parameters: 12V, 500-700Watt

Who can tell a manufacturer of such a motor?

Best regards

Wolfgang

http://www.pittmannet.com/pdf/lcm_bulletin.pdf

the 14xx6 motors have a stall current of 54 amps at 12 v -- just over 600
watts -- and come with HP encoders for servo applications
 
R

Roger Hamlett

Jan 1, 1970
0
Wolfgang said:
Hello,

I search for an application with very high torque request at zero
speed
a brushless motor with sensors. Parameters: 12V, 500-700Watt

Who can tell a manufacturer of such a motor?

Best regards
Try Alxion, or Danaher.
What you don't say, is how fast you want to go, or how 'high', 'high
torque' is?. The problem will be maintaining torque at higher rotational
speeds with such a low supply voltage (this is why cars that use high
power motors for things like steering, and traction applications, all use
higher voltage supplies). It will almost certainly have to be 'custom',
because of the low supply voltage (Bosch do make some units like this for
12v). Some of the smaller Danaher units, may be available for this
voltage.

Best Wishes
 
T

Tim Wescott

Jan 1, 1970
0
Jamie said:
Look at stepper motors., they have a high torque rate of
holding how ever, they work in degree's/ indexes per turn. the more you
get the more expensive and at 700 Watts, that sounds very expensive.

On the second note how ever, they require no feed back.

On the third note:

- they're far bulkier for the torque than a brushless
- they consume far more power for the torque than a brushless
- if the load should exceed the torque capability of the motor the
motor's average torque will go to zero, leading to a failure mode that
is, at best, unrecoverable until things stop.

Stepper motors are good for simple applications when you can afford to
significantly over specify. Other than that they're way more trouble
than they're worth.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Posting from Google? See http://cfaj.freeshell.org/google/

"Applied Control Theory for Embedded Systems" came out in April.
See details at http://www.wescottdesign.com/actfes/actfes.html
 
P

Paul E. Schoen

Jan 1, 1970
0
Roger Hamlett said:
Try Alxion, or Danaher.
What you don't say, is how fast you want to go, or how 'high', 'high
torque' is?. The problem will be maintaining torque at higher rotational
speeds with such a low supply voltage (this is why cars that use high
power motors for things like steering, and traction applications, all use
higher voltage supplies). It will almost certainly have to be 'custom',
because of the low supply voltage (Bosch do make some units like this for
12v). Some of the smaller Danaher units, may be available for this
voltage.

Best Wishes
One low cost solution is an automotive inverter and a 1 HP induction motor.
You probably need a 1500 W inverter to handle starting current surge. PSC
or capacitor start motors have high starting torque. If you will be running
at very low speeds, it may be better to use a three phase motor and a VF
drive. You can directly convert the 12 VDC to 180 VDC internal DC bus for
the drive.

I have also rewound small single phase motors to be three phase, and with
heavy windings to run directly from 12 VDC. I still need to build a good
low voltage VF drive, however.

Paul
 
T

Tim Wescott

Jan 1, 1970
0
Wolfgang said:
Hello,

I search for an application with very high torque request at zero
speed
a brushless motor with sensors. Parameters: 12V, 500-700Watt

Who can tell a manufacturer of such a motor?

Best regards

Wolfgang
Have you done a web search? I'd check Maxon, Escap (Faulhauber, if I
have the spelling right) and Aveox. Aveox is a US company, but Maxon
and Escap are both Swiss, so it may be easier for you to talk to the
factory.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Posting from Google? See http://cfaj.freeshell.org/google/

"Applied Control Theory for Embedded Systems" came out in April.
See details at http://www.wescottdesign.com/actfes/actfes.html
 
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