|reply to leibold |
Re: Is this a brushless motor?
quote:yes understood. But lets not forget that the main point is that heat is motor's enemy... and so is to an intel i7 2600K CPU. They both need cooling to maintain longevity and stability or for them to even work. If you run your CPU at 90C, yes it will work but it won't last you that long. Or if you run it with out cooling, you Pcwon't even boot up due to it heating up and shutting down. Heat principals apply similarly to AC/DC motors. Even to your own body outside in the heat... your sweat is your AC unit.
Basic physics tells us that the difference between the electrical energy that we put into the motor and the mechanical work performed are losses (electrical resistance of the wires, mechanical friction in bearings, etc.) that turn into heat.
Back to electric motors, heat on DC motors kills/weakens the magnets, for one. Also, heat can evaporate the lubricants... which weakens the bearings... which makes the motor less efficient over time.
An open frame motor is more efficient to me just for that reason alone. I am sure that it would even due fine with a smaller fan than a fully canned motor has.
quote:if it's a motor with bearings that require grease, the motor needs to get hot enough to melt the grease to lubricate the bearings. But yeah, I agree.
While getting rid of the heat inside the motor is good, even better (and far more economical) is when the motor is so efficient that it doesn't produce much heat in the first place.
Thanks anyways, my conclusion over all is that this washing machine is more efficient over the others for various reasons.
1- open frame motor.
2- new model and it is expensive. (most things new are more efficient than 4 years ago)
3- easy access to motor if it needs maintenance.
4- heavy duty wash cycles. (more scrubbing per cycle)
5- no solenoid valve.
Sometimes we have to go with our logic, and I believe this is one of those times.
Thanks everyone for the info.