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New(?) Transformer model for LTspice

Discussion in 'Electronic Design' started by [email protected], Jul 23, 2007.

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  1. Guest

    Could be shit and you'll have to fiddle to see what is or isn't going
    on.....

    I wanted to dop down some windings and then dop down a core and
    connect them together with some idea of core saturation.....

    Blah blah blah.

    Anyway

    Winding Model

    Version 4
    SHEET 1 880 680
    WIRE -256 144 -288 144
    WIRE -144 144 -176 144
    WIRE 0 144 -64 144
    WIRE 176 144 144 144
    WIRE 256 144 224 144
    WIRE -144 208 -144 144
    WIRE -64 208 -64 144
    WIRE 224 208 224 144
    WIRE 176 224 176 144
    WIRE -144 320 -144 288
    WIRE -144 320 -288 320
    WIRE -64 320 -64 288
    WIRE 176 320 176 272
    WIRE 176 320 -64 320
    WIRE 224 320 224 288
    WIRE 224 320 176 320
    WIRE -64 352 -64 320
    FLAG 0 144 Hf
    IOPIN 0 144 Out
    FLAG 256 144 LV
    IOPIN 256 144 Out
    FLAG 144 144 DBf
    IOPIN 144 144 In
    FLAG -288 144 1
    IOPIN -288 144 In
    FLAG -288 320 2
    IOPIN -288 320 In
    FLAG -64 352 0
    SYMBOL res -160 128 R90
    WINDOW 0 0 56 VBottom 0
    WINDOW 3 32 56 VTop 0
    SYMATTR InstName RL
    SYMATTR Value {RT*N**2}
    SYMBOL e 224 192 R0
    WINDOW 0 38 42 Left 0
    WINDOW 3 36 65 Left 0
    SYMATTR InstName E1
    SYMATTR Value {N}
    SYMBOL bv -144 192 R0
    WINDOW 0 -134 41 Left 0
    WINDOW 3 -134 67 Left 0
    SYMATTR InstName B1
    SYMATTR Value V=V(LV)
    SYMBOL bi2 -64 208 R0
    WINDOW 0 38 29 Left 0
    WINDOW 3 38 55 Left 0
    SYMATTR InstName B2
    SYMATTR Value I=N*I(B1)

    Winding Symbol

    Version 4
    SymbolType BLOCK
    LINE Normal -32 -32 -16 -32
    LINE Normal -32 32 -16 32
    LINE Normal 64 -32 48 -32
    LINE Normal 64 32 48 32
    RECTANGLE Normal 48 48 -16 -48
    CIRCLE Normal -2 -36 -10 -28
    TEXT 6 -33 Left 0 Hf
    TEXT 3 32 Left 0 DBf
    PIN -32 -32 NONE 8
    PINATTR PinName 1
    PINATTR SpiceOrder 1
    PIN -32 32 NONE 8
    PINATTR PinName 2
    PINATTR SpiceOrder 2
    PIN 64 -32 NONE 8
    PINATTR PinName Hf
    PINATTR SpiceOrder 3
    PIN 64 32 NONE 8
    PINATTR PinName DBf
    PINATTR SpiceOrder 4

    Core Model

    Version 4
    SHEET 1 2328 820
    WIRE 768 176 736 176
    WIRE 1088 176 1024 176
    WIRE 1120 176 1088 176
    WIRE 1312 176 1264 176
    WIRE 1488 176 1440 176
    WIRE 736 240 736 176
    WIRE 1024 240 1024 176
    WIRE 1088 240 1088 176
    WIRE 1312 240 1312 176
    WIRE 1440 240 1440 176
    WIRE 736 352 736 320
    WIRE 1024 352 1024 320
    WIRE 1024 352 736 352
    WIRE 1088 352 1088 320
    WIRE 1088 352 1024 352
    WIRE 1312 352 1312 320
    WIRE 1312 352 1088 352
    WIRE 1440 352 1440 320
    WIRE 1440 352 1312 352
    WIRE 736 384 736 352
    FLAG 1488 176 Us
    IOPIN 1488 176 Out
    FLAG 768 176 Bf
    IOPIN 768 176 Out
    FLAG 736 384 0
    FLAG 1264 176 Hf
    IOPIN 1264 176 In
    FLAG 1120 176 DBf
    IOPIN 1120 176 Out
    SYMBOL bv 1440 224 R0
    WINDOW 0 -419 154 Left 0
    WINDOW 3 -418 174 Left 0
    SYMATTR InstName B3
    SYMATTR Value V=Ue*(1/Ue+exp(-((V(Bf))**2)/(2*Bs**2)))
    SYMBOL bv 736 224 R0
    WINDOW 0 37 149 Left 0
    WINDOW 3 38 173 Left 0
    SYMATTR InstName B1
    SYMATTR Value V=Uo*V(Us)*I(VHF)/Le
    SYMBOL voltage 1312 224 R0
    WINDOW 0 36 48 Left 0
    WINDOW 3 37 72 Left 0
    WINDOW 123 0 0 Left 0
    WINDOW 39 0 0 Left 0
    SYMATTR InstName VHF
    SYMATTR Value 0V
    SYMBOL bi 1024 320 R180
    WINDOW 0 82 47 Left 0
    WINDOW 3 39 27 Left 0
    SYMATTR InstName B2
    SYMATTR Value I=V(Bf)
    SYMBOL ind 1072 224 R0
    WINDOW 0 38 32 Left 0
    WINDOW 3 39 57 Left 0
    WINDOW 39 39 83 Left 0
    SYMATTR InstName L1
    SYMATTR Value {Ae}
    SYMATTR SpiceLine Rpar={1/Ae}

    Core Symbol

    Version 4
    SymbolType BLOCK
    LINE Normal -48 0 -32 0
    LINE Normal 80 0 64 0
    LINE Normal 80 32 64 32
    RECTANGLE Normal 64 48 -32 -16
    TEXT -29 0 Left 0 Hf
    TEXT 16 0 Left 0 DBf
    TEXT 34 31 Left 0 Bf
    PIN -48 0 NONE 8
    PINATTR PinName Hf
    PINATTR SpiceOrder 1
    PIN 80 0 NONE 8
    PINATTR PinName DBf
    PINATTR SpiceOrder 2
    PIN 80 32 NONE 8
    PINATTR PinName Bf
    PINATTR SpiceOrder 3


    If that works then cleverer people than what I am will be able to work
    it out and either rubbish it or make it better/extend it.

    What you do is dop down some windings for your transformer, right
    click on them and give them parameters for RT, resistance of a turn,
    and N, number of turns.

    Then you dop down a core and give it parameters for Uo (4*PI*1E-7) Ae,
    Le, Ue and Bs (saturation flux density).

    Tie all the Hf and Dbf terminals together and away you might go.

    Does inductors too. Just use a single winding and core, give em your
    guesses and Hf and Dbf together.

    DNA
     
  2. On Mon, 23 Jul 2007 11:58:01 -0700, in sci.electronics.design
    welcome back


    martin
     

  3. Welcome back,
    Your dreams were your ticket out.

    Welcome back,
    To that same old place that you laughed about.

    Well the names have all changed since you hung around,
    But those dreams have remained and they're turned around.

    Who'd have thought they'd lead ya (Who'd have thought they'd lead ya)
    Here where we need ya (Here where we need ya)

    Yeah we tease him a lot cause we've hot him on the spot, welcome back,
    Welcome back, welcome back, welcome back.

    Best regards,
    Spehro Pefhany
     

  4. Now one of Kotter's "Sweathogs" is a real Sweaat Hog, in a fat
    suit and drag.


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  5. Guest

    <snip>

    Welcome back.
     
  6. Genome

    Genome Guest

    Stupid thing is......

    I would have died for you.

    DNA
     
  7. xray

    xray Guest

    How does your name parse?

    Is it Mr. Spam iz good
    or Mrs. Pam iz good?

    Both are food related -- which seems to work for a resurrected DNA.
    Spam being the meat-like product and Pam being a can of spray stuff for
    painting your pans before frying or baking.


    (http://www.spam.com/
    or
    http://www.conagrafoods.com/brands/pam/index.jsp)
     
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