From: Subrahmanya Ramakrishnan
Sent: Thursday, November 29, 2007 3:09 PM
To: Michael R. Kalish
Subject: FW: Trim Coil requirements


Mike
As per the latest input from Art Brooks, voltages up to 400V may be induced because of mutual coupling. I am also waiting for input from Mike Z. Thus we may have to reduce the number of turns to 99. However before it is finalized we have to get the required input from others.
Raki

Mike
For the requested response time the circuit applied voltage has to be nearly 600V including line drops. The DC link voltage for the H bridges may have to be 0 -1000V.
Hence the coil (of 121 turns) has to be designed such that it shall be capable of being hipotted at 3kV to ground. 
Raki

-----Original Message-----
From: Hutch Neilson 
Sent: Tuesday, November 20, 2007 9:57 PM
To: Michael R. Kalish
Cc: Michael C. Zarnstorff; Phil Heitzenroeder; Subrahmanya Ramakrishnan; Arthur W. Brooks; Thomas G. Brown
Subject: Trim Coil requirements

Mike,

Following up on the recent peer review, here is the requested  
guidance regarding trim coil requirements:

1.  Response time / voltage:  zero to 20 kA-turn in 20 ms.   
(Strawman)  Please advise on the voltage and force implications  
before going too far with this.
2.   Dimensional accuracy:  Fabrication tolerance: ±1/4 in.;   
Positioning tolerance: ±1/2 in.   Record as-built dimensions.
3.   Midplane coils:  examine the feasibility of adding two coils  
straddling the midplane at the C-C joints.  One coil on each side of  
the joint.

Hutch