[Amps] What is the meaning of ACVFD ?

[Roger (sub1)]

On 7/2/2011 3:17 PM, Paul Kraemer wrote:
> AC Variable Frequency Drive
> An electronic motor control that rectifies incoming line voltage (single or
> 3 phase) to provide a dc buss voltage (approximately 350vdc for a 230vac
> drive) which is supplied to a "six pack" array of power devices (transistors
> or fets) which is controlled by microprocessor to synthesize a pwm 3 phase
> output to a motor.

I've been told not depend on the solid state 3 phase converters to run 
much of a motor.  When you get up to a lathe or mill a rotary converter 
works much better and of course costs many times more. <sigh>   For a 7 
HP lathe it takes a 15 to 20 HP rotary converter. (run 2 to 3 times the 
rating of the load)  Too bad too as the solid state converter is a few 
hundred dollars while the rotary converter is $2,000 or more.

73

Roger (K8RI)
> Paul K0UYA
> ----- Original Message -----
> From:<pdussertvidalet at free.fr>
> To:<amps at contesting.com>
> Sent: Friday, July 01, 2011 11:44 PM
> Subject: [Amps] What is the meaning of ACVFD ?
>
>
>>
>> What is the meaning of the acronym ACVFD ? Message 1 , vol 103 , from Paul
>> Kouya
>> .
>> How can I connect a one phase transformer , 230 volts , on a three phases
>> main
>> using the three phases to split the power between them ? 73 from Pierre /
>> F8GY .
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