Rmp required

[Zoobi_99]

Can anyone tell me that how many rpms required for a dynamo of (7kva) to produced at its maximum out put.

 

[broadgage]

It depends on the design speed, which can only be readily obtained from the manufacturer.

 

[K8MHZ]

It depends on the design speed, which can only be readily obtained from the manufacturer.

Most use a single pair of poles so if the desired AC frequency was 60 Hz the RPM would be 3600.

 

[broadgage]

Most use a single pair of poles so if the desired AC frequency was 60 Hz the RPM would be 3600.

True for an alternator, but the O/P stated dynamo, which implies DC.
Dynamos can be built for most any speed depending on application.

OTOH a rating of 7KVA, not KW implies an alternator.

 

[Jraef]

RMPs?
Revolting Motheaten Pajamas?
Reclusive Monkey Pulchritude?
Rotating Minnow Periwinkles?

 

[nakulak]

RMPs?
Revolting Motheaten Pajamas?
Reclusive Monkey Pulchritude?
Rotating Minnow Periwinkles?

nopd


rotating monkey pajamas

 

[augie47]

RMPs?
Revolting Motheaten Pajamas?
Reclusive Monkey Pulchritude?
Rotating Minnow Periwinkles?

or possibility a Canadian law enforcement question

 

[ohmhead]

Can anyone tell me that how many rpms required for a dynamo of (7kva) to produced at its maximum out put.

Well for a given rated output the speed will be much lower for a dc current dynamo then a alternating current design .

Heres a formula P= number of poles


R= revolution per minute

N= frequency of cycles per second


[ N= PR/2X60 ]


Example 1== KW 1000 POLES 6 RPM 1000 VOLTS 1000

Example 2 == KW 1000 POLES 6 RPM 1500 VOLTS 550

Relation between speed and freq is not how high it is but the balance of the speed to the poles in syn.