FOR those who
wish to view a Computer
Simulation
of my Magneto Ignition with
Diode system,
I am including the schematic diagram MAGNETO.SCH (for
personal use only):
and
MAGNETO.CIR for the program TopSPICE (PSPICE):
TopSPICE Simulation of MAGNETO
IGNITION with Diode
.PARAM
RPM=2500 .PARAM
Vpeak=10.5 .PARAM
Freq={RPM/60*2} .PARAM
Period={1/(RPM/60)} .PARAM
Open={Period/8} .PARAM
Duration={Period*0.275} VMAGNETO
VM 0 SIN (0 {Vpeak}
{Freq}) VTRIG VT
0 PULSE (1 0 {Open}
1nS 1nS {Duration}
{Period} 0) RTEST VT
0 10MEG ;Return
path
C1 PRI 0 0.22uF ;0.22uF
500V AC POLYPROPYLENE CONDENSER D1
PRI CB DP600J ;P600J
600V 6A Silicon Rectifier Diode S1
CB 0 VT 0 SW ;CONTACT
BREAKER
XMAGCOIL PRI VM SEC VM XMAGNETO;MAGNETO
COIL +PRI GND +SEC GND RLEAD
SEC 1 1R ;HT
LEAD RESISTANCE LLEAD
1 2 25uH ;HT
LEAD INDUCTANCE CLEAD
2 0 70pF ;HT
LEAD CAPACITANCE
XSPARKPLUG SPARK 0 XNGKBPR4HS
;NGK BPR4HS
SPARK PLUG RPLUG 2 3
5K ;SPARK
PLUG RESISTANCE LPLUG
3 SPARK 10nH ;SPARK
PLUG INDUCTANCE CPLUG
SPARK 0 100pF ;SPARK
PLUG CAPACITANCE
#AUTOPLOT
1 V(VM) #AUTOPLOT
2 {1V(VT)} #AUTOPLOT
3 V(PRI) #AUTOPLOT
4 V(SEC) #AUTOPLOT
5 I(D1)
.TRAN
0.5mS 35mS 0mS 0.5mS .SAVE
.MODEL
DP600J D ;P600J
600V 6A Silicon Rectifier Diode +IS=1.19449e08
RS=0.00284884 N=1.19832 EG=1.3 +XTI=0.5 BV=630 IBV=0.0001
CJO=3.13475e10 +VJ=1.00996 M=0.459839 FC=0.5 TT=2.04804e06 +KF=0
AF=1
.SUBCKT
XMAGNETO 1 2 3 4 ;MAGNETO
COIL +PRI GND +SEC GND .PARAM
RSEC=4750 LLEAK=282uH RPRI=1.1R CINTWIND=50pF TNRATIO=62.2 RS
6 3 {RSEC} E3
5 4 VALUE {V(7,2)*TNRATIO} LL
8 7 {LLEAK} CSP
1 3 {CINTWIND} VM
5 6 DC 0 .PARAM
LCORE=4.95MH FEDDY=5.05KHZ E2 13 0 VALUE {V(8,2)/V(12,0)} E1
12 0 TABLE {ABS(I(V1))} +
(0,1) (.5,1) (.75,.993) (1.25,.892) + (1.75,.856)
(2.25,.856) (2.75,.793) + (3.25,.772) (3.75,.735)
(4.25,.674) + (4.75,.634) (5.25,.569) (5.75,.535) G2
8 11 14 0 1 C1 15 14 {LCORE} V1
11 2 DC 0 G1 0 14 13 0 1 R2 0 14 100MEG R1
0 15 {1/(6.283*FEDDY*LCORE)} R3
2 8 100MEG G3 7 2 VALUE {I(VM)*TNRATIO} RP
1 8 {RPRI} .ENDS
XMAGNETO
.SUBCKT XNGKBPR4HS
1 2 ;NGK
BPR4HS SPARK PLUG .MODEL
D1N4148 D(Is=2.682n N=1.836 Rs=.5664 Xti=3 Eg=1.11 Cjo=4p +
M=.3333 Vj=.5 Fc=.5 Bv=100 Ibv=100u Tt=11.54n) .PARAM
VGLOW=1500 VARC=150 ISUS=2mA VBRKDWN=12000 IARC=200mA D3
10 11 DZARC SWSARC 3 10 9 0 SWARC .MODEL
SWARC VSWITCH Roff=50MEG Ron=5R Voff=0V Von=10V RT1
7 0 50R DT2 8 9 D1N4148 .MODEL
DZGLOW D (BV={VGLOW}
IS=1uA RS=5R IBV=10uA) EBRKDWNCTRL 6 0 VALUE {IF(ABS(V(1,2))>VBRKDWNABS(I(VSENSE))>ISUS,12,0)} .MODEL
DZARC D (BV={VARC}
IS=1uA RS=5R IBV=10uA) D4 5 11 DZARC EARC_CTRL
8 0 VALUE {IF(ABS(I(VSENSE))>IARC,12,0)} D2
5 4 DZGLOW VSENSE 5 2 DC 0 CT2 9 0 0.1uF RT2
9 0 50R CT1 7 0 0.25uF SWSBV 1 3 7 0 SW_SPK .MODEL
SW_SPK VSWITCH Roff=50MEG Ron=5R Voff=0V Von=10V D1
3 4 DZGLOW DT1 6 7 D1N4148 .ENDS
XNGKBPR4HS
.END
The graph below shows the effect of the Diode (WITHOUT
SPARK PLUG FITTED):
