ltspice model for a kettle element !

I

IanM

Guest
Anyone like to suggest some improvements to my simulation of a relay
switching a kettle element?

I guessed at all values - the inductor value , no clue what that would be
anyway


Version 4
SHEET 1 880 680
WIRE 320 -272 0 -272
WIRE 320 -224 320 -272
WIRE 0 -192 0 -272
WIRE 0 0 0 -112
WIRE 192 0 0 0
WIRE 192 32 192 0
WIRE 320 80 320 -144
WIRE -64 96 -480 96
WIRE 0 112 0 0
WIRE -48 128 -128 128
WIRE -480 160 -480 96
WIRE 192 160 192 112
WIRE -64 176 -64 96
WIRE -48 176 -64 176
WIRE -480 272 -480 240
WIRE -128 272 -128 128
WIRE -128 272 -480 272
WIRE -96 272 -128 272
WIRE 0 272 0 192
WIRE 0 272 -16 272
WIRE 192 272 192 224
WIRE 192 272 0 272
WIRE 320 272 320 160
WIRE 320 272 192 272
WIRE -128 304 -128 272
FLAG -128 304 0
SYMBOL sw 0 96 R0
SYMATTR InstName S1
SYMATTR Value RELAYSW
SYMBOL voltage 0 -208 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value SINE(0 240 50)
SYMBOL res 304 64 R0
SYMATTR InstName R1
SYMATTR Value 20
SYMATTR SpiceLine pwr=3K
SYMBOL ind 304 -240 R0
SYMATTR InstName L1
SYMATTR Value 90ľ
SYMATTR SpiceLine Ipk=13 Rser=0.5
SYMBOL voltage -480 144 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value PULSE(0 12 1 1u 1u 1 2 5)
SYMBOL res 0 256 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 1000K
SYMBOL res 176 16 R0
SYMATTR InstName R3
SYMATTR Value 1000K
SYMBOL cap 176 160 R0
SYMATTR InstName C1
SYMATTR Value 0.1ľ
TEXT -330 -56 Left 0 !.tran 0 2.1 1.9 0.01
TEXT -232 392 Left 0 !.model RELAYSW SW[Ron=0.1 Roff=1G Vt=9 Vh=.4]
 
On Sat, 31 Jul 2010 10:57:42 +0100, "IanM" <nobody@no_where.co.uk>
wrote:

Anyone like to suggest some improvements to my simulation of a relay
switching a kettle element?
Click to expand...
---
Version 4
SHEET 1 880 680
WIRE 320 -16 64 -16
WIRE 320 16 320 -16
WIRE 272 32 176 32
WIRE 64 128 64 -16
WIRE 176 128 176 32
WIRE 320 128 320 96
WIRE 64 272 64 208
WIRE 176 272 176 208
WIRE 176 272 64 272
WIRE 272 272 272 80
WIRE 272 272 176 272
WIRE 320 272 320 208
WIRE 320 272 272 272
WIRE 64 368 64 272
FLAG 64 368 0
SYMBOL sw 320 112 M180
SYMATTR InstName S1
SYMATTR Value RELAYSW
SYMBOL voltage 64 112 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 24 104 Invisible 0
SYMATTR InstName V1
SYMATTR Value SINE(0 240 50)
SYMBOL res 304 112 R0
SYMATTR InstName R1
SYMATTR Value 20
SYMATTR SpiceLine pwr=3K
SYMBOL voltage 176 112 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 24 104 Invisible 0
SYMATTR InstName V2
SYMATTR Value PULSE(0 12 0 1u 1u .1 .2)
TEXT 88 296 Left 0 !.tran 1 uic
TEXT 88 328 Left 0 !.model RELAYSW SW[Ron=0.1 Roff=1G Vt=9 Vh=.4]
 
"John Fields" <jfields@austininstruments.com> wrote in message
news:ail85650qjrh8s7s9mv8ekob4i8hvf0ouk@4ax.com...
On Sat, 31 Jul 2010 10:57:42 +0100, "IanM" <nobody@no_where.co.uk
wrote:

Anyone like to suggest some improvements to my simulation of a relay
switching a kettle element?

---
Version 4
SHEET 1 880 680
WIRE 320 -16 64 -16
WIRE 320 16 320 -16
WIRE 272 32 176 32
WIRE 64 128 64 -16
WIRE 176 128 176 32
WIRE 320 128 320 96
WIRE 64 272 64 208
WIRE 176 272 176 208
WIRE 176 272 64 272
WIRE 272 272 272 80
WIRE 272 272 176 272
WIRE 320 272 320 208
WIRE 320 272 272 272
WIRE 64 368 64 272
FLAG 64 368 0
SYMBOL sw 320 112 M180
SYMATTR InstName S1
SYMATTR Value RELAYSW
SYMBOL voltage 64 112 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 24 104 Invisible 0
SYMATTR InstName V1
SYMATTR Value SINE(0 240 50)
SYMBOL res 304 112 R0
SYMATTR InstName R1
SYMATTR Value 20
SYMATTR SpiceLine pwr=3K
SYMBOL voltage 176 112 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 24 104 Invisible 0
SYMATTR InstName V2
SYMATTR Value PULSE(0 12 0 1u 1u .1 .2)
TEXT 88 296 Left 0 !.tran 1 uic
TEXT 88 328 Left 0 !.model RELAYSW SW[Ron=0.1 Roff=1G Vt=9 Vh=.4]

Thanks John,
Click to expand...

so negligible inductance ?

Ian
 
On Sat, 31 Jul 2010 18:52:33 +0100, "IanM" <nobody@no_where.co.uk>
wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:ail85650qjrh8s7s9mv8ekob4i8hvf0ouk@4ax.com...
On Sat, 31 Jul 2010 10:57:42 +0100, "IanM" <nobody@no_where.co.uk
wrote:

Anyone like to suggest some improvements to my simulation of a relay
switching a kettle element?

---
Version 4
SHEET 1 880 680
WIRE 320 -16 64 -16
WIRE 320 16 320 -16
WIRE 272 32 176 32
WIRE 64 128 64 -16
WIRE 176 128 176 32
WIRE 320 128 320 96
WIRE 64 272 64 208
WIRE 176 272 176 208
WIRE 176 272 64 272
WIRE 272 272 272 80
WIRE 272 272 176 272
WIRE 320 272 320 208
WIRE 320 272 272 272
WIRE 64 368 64 272
FLAG 64 368 0
SYMBOL sw 320 112 M180
SYMATTR InstName S1
SYMATTR Value RELAYSW
SYMBOL voltage 64 112 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 24 104 Invisible 0
SYMATTR InstName V1
SYMATTR Value SINE(0 240 50)
SYMBOL res 304 112 R0
SYMATTR InstName R1
SYMATTR Value 20
SYMATTR SpiceLine pwr=3K
SYMBOL voltage 176 112 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 24 104 Invisible 0
SYMATTR InstName V2
SYMATTR Value PULSE(0 12 0 1u 1u .1 .2)
TEXT 88 296 Left 0 !.tran 1 uic
TEXT 88 328 Left 0 !.model RELAYSW SW[Ron=0.1 Roff=1G Vt=9 Vh=.4]

Thanks John,
---
Click to expand...
You're welcome. :)
---

so negligible inductance ?
---
Click to expand...
Yup.
 
Hello Ian,

If it's abuot 240V AC, you should replace SINE(0 240 50) with SINE(0 339.4
50)
when you want simulate real behavior over time.

..TRAN analysis: specify peak value -> SINE(0 339.4 50)

..AC analysis: specify RMS-value -> .AC 240

Best regards,
Helmut
 
On Sun, 1 Aug 2010 09:44:46 +0200, "Helmut Sennewald"
<helmutsennewald@t-online.de> wrote:

Hello Ian,

If it's abuot 240V AC, you should replace SINE(0 240 50) with SINE(0 339.4
50)
Click to expand...
---
Yeah, I missed that in my post to him.

Good catch! :)

JF
 
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