reduce the speed of a single phase induction motor
Hi Comrades, please what is the simplest way to reduce the speed of a single phase induction motor to about 50%?
also can a universal motor run for 24 hours on 90% load? (with all name plate ratings observed) thank you. |
reduce the speed of a single phase induction motor
wrote:
---------------------------- Hi Comrades, please what is the simplest way to reduce the speed of a single phase induction motor to about 50%? ** Just feed it with 25 or 30 Hz sine wave at about half voltage. Or if that is a problem, use a gear or belt reduction system. also can a universal motor run for 24 hours on 90% load? ** 24hrs, no problem. But after that it is totally buggered. ..... Phil |
reduce the speed of a single phase induction motor
On Monday, October 7, 2019 at 7:04:48 PM UTC-4, wrote:
Hi Comrades, please what is the simplest way to reduce the speed of a single phase induction motor to about 50%? also can a universal motor run for 24 hours on 90% load? (with all name plate ratings observed) thank you. What we would need is horsepower, operating voltage, then anticipated maximum load. https://cdn.automationdirect.com/ima.../l_gs110p5.jpg These exist, but as the load increases, so does the cost. As to operational capacities, if the motor is rated as "continuous" and properly cooled, there should be no issue about how long it runs as long as it is within its design load. NOTE: "Design Load" is generally some amount less than "Maximum Load". But not too much, typically around 10% - so you need to know which "90%" you are measuring. https://www.plantengineering.com/art...s-actual-load/ Gives you more on the subject. Peter Wieck Melrose Park, PA |
reduce the speed of a single phase induction motor
|
reduce the speed of a single phase induction motor
On 8/10/2019 10:04 am, wrote:
Hi Comrades, please what is the simplest way to reduce the speed of a single phase induction motor to about 50%? also can a universal motor run for 24 hours on 90% load? (with all name plate ratings observed) thank you. **This may be of some use: http://www.siliconchip.com.au/Issue/...res =nonflash Appropriate alterations to suit your local mains supply will be required of course. -- Trevor Wilson www.rageaudio.com.au -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
reduce the speed of a single phase induction motor
On Tuesday, 8 October 2019 00:04:48 UTC+1, wrote:
Hi Comrades, please what is the simplest way to reduce the speed of a single phase induction motor to about 50%? As folk have said, that's not a simple thing. There are various ways but all have issues, in some case the issue is just cost/complexity. also can a universal motor run for 24 hours on 90% load? (with all name plate ratings observed) thank you. if it's rated to run continuously at 90% or greater load, yes. Otherwise no. NT |
reduce the speed of a single phase induction motor
On Wednesday, October 9, 2019 at 4:50:06 PM UTC+1, wrote:
On Tuesday, 8 October 2019 00:04:48 UTC+1, wrote: Hi Comrades, please what is the simplest way to reduce the speed of a single phase induction motor to about 50%? As folk have said, that's not a simple thing. There are various ways but all have issues, in some case the issue is just cost/complexity. also can a universal motor run for 24 hours on 90% load? (with all name plate ratings observed) thank you. if it's rated to run continuously at 90% or greater load, yes. Otherwise no. NT Thanks to you all. you ve all given me a great deal of knowledge. |
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