Selecting a DC Motor 4

[Barbo88]

Hi everyone,

I have a conveyor belt system which needs to carry heavy stuff. I have done all the necessary calculations and i'm looking for a DC Motor (I can't use an AC Motor). Can someone help me please to find the right motor for my system ?

Parameters required: - Speed required form the motor (MIN) - 5.5 RPM
- Torque required from the motor (MIN)- 35 Nm
- Power of the motor should be - 20 W

I would be very grateful if you can help me to find a proper DC Motor.

Best Regards
Barbo

 

[77JQX]

In your 20 W figure have you inculded the power to accelerate the 1200 kg/hr of coal up to the moving speed of the conveyor?

 

[Brad1979]

A DC motor's speed is proportional to voltage, not frequency. PWM changes the speed of the DC motor by changing its effective voltage. PWM can affect the motor's torque. I've seen a motor's torque rating cut in half by using a PWM drive.

If you're sure this is the size motor you need, then I'd also check out some of the other DC motor manufacturers that make gearmotors this size. Baldor, Bison, Bodine, Groschopp, Dumore, Johnson Electric, etc. Some of them can probably supply a control with it that they already know the ratings for.

 

[itsmoked]

Coal huh? Coal => coal dust. You really want arcing brushes involved in this? You have yet to clue us in as to why non-arcing AC can't be used.

Keith Cress
kcress -

http://www.flaminsystems.com

 

[berkshire]

The OP did select a totally enclosed motor.

You are judged not by what you know, but by what you can do.

 

[Brad1979]

Totally enclosed does not imply dust-proof.

 

[ScottyUK]

TEFC or dust-proof does not imply certified for hazardous area duty either. Coal dust is explosive in the right conditions, and flammable in many others.

 

[FreddyZ]

I will venture a guess that you are not going to move a ton of coal an hour anywhere, including downhill, with a $100 gearmotor. Not for long.

You need some realistic numbers to work with.
And you should address the safety considerations as set forth above.

 

[OperaHouse]

Thank you for finlly saying that. You get a STAR,

From the beginning this seemed like a make work project. The kind they give to the new kid to see how wet behind the ears he is. In my day they sent them out for a Ten Oh W Tube.

The internet can be a resource. Had he avoided "txt-spk" he would be looking a lot smarter to his boss right now.