Booster Motor
Booster Motor
(OP)
All,
I'm looking to do a power transmission unit for a lifting device. This unit is going to be used moving people up and down stairs. One of the things we are looking to do is provide battery backup in the event of a power failure. We thought through some options and one of the options is to couple a smaller HP motor moving at a slower speed to the back of the fan output shaft on the main drive motor. This will reduce the size of the batteries we need and will increase the cycles we can get out of a set of batteries. A couple of questions:
1. Has anyone done something like this in the past?
2. If the smaller motor is a gear motor, what reduction in efficiency can be expected if we are backdriving the smaller motor?
3. Any better suggestions?
Regards,
Rich......
I'm looking to do a power transmission unit for a lifting device. This unit is going to be used moving people up and down stairs. One of the things we are looking to do is provide battery backup in the event of a power failure. We thought through some options and one of the options is to couple a smaller HP motor moving at a slower speed to the back of the fan output shaft on the main drive motor. This will reduce the size of the batteries we need and will increase the cycles we can get out of a set of batteries. A couple of questions:
1. Has anyone done something like this in the past?
2. If the smaller motor is a gear motor, what reduction in efficiency can be expected if we are backdriving the smaller motor?
3. Any better suggestions?
Regards,
Rich......
Richard Nornhold, PE





RE: Booster Motor
Don
Kansas City
RE: Booster Motor
I'm with eromlignod. There are many cases you would even damage the small motor (well, not really the motor but the gearbox). Extreme: if the gearbox is screw+helical gear, it can't even be back-driven.
Regards
RE: Booster Motor
RE: Booster Motor
Don
Kansas City
RE: Booster Motor
eh eh, yes, you're perfectly right. Using a smaller motor can be useful only if there is a current limitation in the design (I seem to know some batteries don't have a linear characteristic: over a certain current drain, the capacity drops). But then it would be far better to look for a different type of batteries!!
Thank you Blacksmith for waking me up...
Regards
RE: Booster Motor
RE: Booster Motor
RE: Booster Motor
RE: Booster Motor
No need for an electrical backup system.
RE: Booster Motor
RE: Booster Motor
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RE: Booster Motor
RE: Booster Motor
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Sometimes I only open my mouth to swap feet...