electric motor

[Timothy P Booth]

hi all . has eney one had much to do with slowing a single phase motor down from 1440 rpm, to say 900 rpm. iknow that you can not use a rheostat as it will burn the said motor out .

 

[Bobster]

Can use an inverter.

 

[UKMeterman]

Depends on the type of motor.. more details needed.

 

[Barry White]

Most single phase speed controlers simply clip parts of the ac sine wave to increase slip in the motor thus reducing speed and OUTPUT POWER. there are more expensive units that give better results but your after a 40% reduction.
A 40% reduction may also give problems as the cooling fan is spinning slower too.
Dont know of a single phase to single phase inverteror VSD for this use either (there will be a unit but Ive not seen one)

Any chance of gearing the speed down by changing the pullys etc.

 

[Darkwood]

Are you after an Electrical solution or will mechanical ones suffice too... various ways all with pro's and con's but need all the details about the motor and its duty, loading etc .....

 

[Charlie_]

Depends on a few things like application, load, etc..
A few methods available, the simplest method is to use an auto tx.

 

[elevate]

Will the motor be permanently running at 900 rpm or various speeds, if permanent the motor can be rewound to accommodate 900 rpm (might need to add a cooling fan)

 

[PEG]

Is this fixed speed or variable,original equipment being modified,will there be starting loads,is the motor cooled or enclosed,any centrifugal or speed switching,what is the duty cycle....every good idea starts with some eejit asking lots of questions (that would be me...) :conehead:

 

[Knobhead]

Ask your tutor or mentor.

 

[Jonspark]

probably best to phone a motor rewind shop and ask them.