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MetrostroiAddon/lua/metrostroi/systems/sys_81_702_electric.lua
g_brzhezinskiy 1d05caf866 init
2021-01-02 12:51:45 +03:00

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----------------------------------------------------------------------------
-- 81-702 electric schemes
--------------------------------------------------------------------------------
-- Copyright (C) 2013-2018 Metrostroi Team & FoxWorks Aerospace s.r.o.
-- Contains proprietary code. See license.txt for additional information.
--------------------------------------------------------------------------------
Metrostroi.DefineSystem("81_702_Electric")
TRAIN_SYSTEM.Dc = 1
TRAIN_SYSTEM.Do = 2
TRAIN_SYSTEM.DcI = 3
TRAIN_SYSTEM.DoI = 4
function TRAIN_SYSTEM:Initialize(typ1,typ2)
self.Type = self.Type or self.Dc
-- Load all functions from base
Metrostroi.BaseSystems["Electric"].Initialize(self)
for k,v in pairs(Metrostroi.BaseSystems["Electric"]) do
if not self[k] and type(v) == "function" then
self[k] = v
end
end
end
if CLIENT then return end
function TRAIN_SYSTEM:Inputs(...)
return { "Type" }
end
function TRAIN_SYSTEM:Outputs(...)
return Metrostroi.BaseSystems["Electric"].Outputs(self,...)
end
function TRAIN_SYSTEM:TriggerInput(name,value)
if name == "Type" then
self.Type = value
end
end
-- Node values
local S = {}
-- Converts boolean expression to a number
local function C(x) return x and 1 or 0 end
local min = math.min
local max = math.max
local wires = {1,2,3,4,5,6,7,8,11,10,12,13,15,16,17,18,20,22,23,24,27,28,31,32,}
function TRAIN_SYSTEM:SolveAllInternalCircuits(Train, dT)
---[[
local RheostatController = Train.RheostatController
local P = Train.PositionSwitch
local RK = RheostatController.SelectedPosition
local B = (Train.Battery.Voltage > 55) and 1 or 0
local T = Train.SolverTemporaryVariables
local BO = min(1,B * Train.VB.Value+T[10])--B * Train.VB.Value
local KV = Train.KV
local Panel = Train.Panel
local isInt = self.Type>2
Panel.V1 = BO
Train:WriteTrainWire(10,B*Train.VB.Value)
S["10AK"] = BO*Train.VU.Value
S["U2"] = S["10AK"]*KV["U2-10AK"]
Train:WriteTrainWire(8,T[10]*KV["10-8"])
Train:WriteTrainWire(1,S["U2"]*KV["U2-1"])
Train:WriteTrainWire(2,S["U2"]*KV["U2-2"])
Train:WriteTrainWire(3,S["U2"]*KV["U2-3"])
Train:WriteTrainWire(6,S["U2"]*KV["U2-6"])
Train:WriteTrainWire(7,S["U2"]*KV["U2-7"])
Train:WriteTrainWire(17,S["10AK"]*KV["10AK-17"]*Train.VRP.Value)
Train:WriteTrainWire(12,-KV["0-12"])
Train:WriteTrainWire(20,S["10AK"]*Train.VZ.Value)
Train:WriteTrainWire(24,S["U2"]*Train.SN.Value)
Train:WriteTrainWire(4,S["U2"]*KV["U2-4"])
Train:WriteTrainWire(5,(S["U2"]*KV["U2-5M"])*(Train.UAVAC.Value+KV["5M-5"]))
Panel.RRP = S["U2"]*T[18]
Panel.GRP = BO*Train.RPvozvrat.Value
S["A2"] = math.max(0,math.min(1,(self.Aux750V-100)/670))
S["D1"] = BO*KV["D-D1"]
S["D2"] = BO*KV["D-D2"]
Panel.Headlights1 = S["A2"]*KV["F-F7"]
Panel.Headlights2 = Panel.Headlights1
if not isInt then
local RRI_VV = Train.RRI_VV
RRI_VV.Power = BO*Train.RRIEnable.Value
RRI_VV.AmplifierPower = BO*Train.RRIAmplifier.Value
Train:WriteTrainWire(13,RRI_VV.AmplifierPower*Train.RRI.LineOut)
end
Panel.AnnouncerPlaying = T[13]
S["RA"] = -T[12]
local RUM = KV.RCU
Train.RZ_2:TriggerInput("Set",T[24]*RUM*(1-Train.LK3.Value))
S["18A"] = RUM*(Train.RPvozvrat.Value*100+(1-Train.LK3.Value))
Train:WriteTrainWire(18,S["18A"])
Panel.TW18 = S["18A"]
Train.PneumaticNo2:TriggerInput("Set",T[8]*(1-Train.LK3.Value))
Train.PneumaticNo1:TriggerInput("Set",T[8]*C(14<=RK and RK<=20)*S["RA"]+T[20])
P:TriggerInput("VP",T[5]*RUM*P.NZ*S["RA"])
P:TriggerInput("NZ",T[4]*RUM*P.VP*S["RA"])
Train.LK2:TriggerInput("Set",(T[5]*RUM*P.VP+T[4]*RUM*P.NZ)*Train.AVT.Value*(1-Train.RPvozvrat.Value)*(Train.M.Value+Train.LK1.Value*Train.LK2.Value)*S["RA"])
Train.RVuderzh = T[7]*RUM*S["RA"]
Train.RPvozvrat:TriggerInput("Open",T[17]*RUM)
P:TriggerInput("TPT",T[6]*RUM*(1-Train.LK1.Value)*S["RA"])
P:TriggerInput("TPM",T[1]*RUM*(1-Train.M.Value)*S["RA"])
S["2G"]= (T[2]*RUM*((1-Train.RV.Value)*P.TPT*C(1<=RK and RK<=18)+P.TPM*(C(1<=RK and RK<=11 or 14<=RK and RK<=18)+Train.SH1.Value*C(12==RK or RK==19)))+T[3]*RUM*C(RK==13))*(1-Train.RU.Value)
S["2E"] = BO*RUM*(RheostatController.PV2+(C(2<=RK and RK<=20)*(1-Train.M.Value)*(1-Train.LK1.Value)+S["2G"]*Train.LK3.Value)*RheostatController.PV1)
Train.RVpod = BO*RUM*RheostatController.PV2
Train.RUpod = BO*RUM*RheostatController.PV2--+C(2<=RK and RK<=20)*(1-Train.M.Value)*(1-Train.LK1.Value)*RheostatController.PV1)
RheostatController:TriggerInput("RK2",S["2E"]*RheostatController.PV3)
RheostatController:TriggerInput("RK1",S["2E"]*(1-RheostatController.PV3))
Train.RV:TriggerInput("Close",Train.RVuderzh*Train.RVpod)
Train.RV:TriggerInput("Open",(1-Train.RVuderzh))
S["1B"] = T[6]*RUM*P.TPT+T[1]*RUM*P.TPM
Train.RUavt = S["1B"]*S["RA"]
S["1D"] = S["1B"]*(1-Train.RPvozvrat.Value)
Train.LK3:TriggerInput("Set",S["1D"]*Train.LK2.Value*S["RA"])
S["1V"] = S["1D"]*(Train.LK2.Value+C(RK==1))
Train.M:TriggerInput("Set",S["1V"]*(P.TPT+Train.NR.Value*C(1<=RK and RK<=13))*S["RA"])
Train.LK1:TriggerInput("Set",S["1V"]*(Train.NR.Value*P.TPM)*S["RA"])
Train.RUreg = S["1V"]*C(2<=RK and RK<=10)*P.TPM*S["RA"]-BO*RUM*C(RK==3 or RK==18 or RK==19)*0.75
S["1L"] = (C(RK==1)+C(RK==12 or RK==13 or RK==19 or RK==20)*P.TPM)*S["RA"]
Train.SH1:TriggerInput("Set",S["1B"]*S["1L"])
Train.SH2:TriggerInput("Set",S["1B"]*S["1L"])
Train:WriteTrainWire(11,BO*Train.VU2.Value)
Train:WriteTrainWire(23,BO*Train.KU3.Value)
Train:WriteTrainWire(22,T[23]*Train.AK.Value)
Train:WriteTrainWire(27,BO*Train.KU1.Value)
Train:WriteTrainWire(28,BO*Train.KU2.Value)
Train:WriteTrainWire(16,S["D1"]*Train.KU7.Value*Train.KU8.Value)
Train:WriteTrainWire(31,S["D1"]*(Train.KU4.Value+Train.KU10.Value+Train.KU5.Value))
Train:WriteTrainWire(32,S["D1"]*(Train.KU6.Value+Train.KU5.Value))
S["11A"] = T[11]*(1-Train.NR.Value)
Panel.EmergencyLights1 = --[[ T[10]--]] BO*Train.VU3.Value+S["11A"]*(1-Train.VU3.Value)
Panel.EmergencyLights2 = S["11A"]
Panel.MainLights1 = math.max(0,math.min(1,
(
self.Aux750V-100
-self.Itotal*0.25*P.TPM
-25*Train.KK.Value
)/750*(0.5+0.5*B*Train.VB.Value*Train.KZ1.Value)
))
Panel.MainLights2 = Panel.MainLights1*Train.KO.Value
Panel.VPR = C(self.Aux750V>250)
Train.KK:TriggerInput("Set",T[22])
Train.KO:TriggerInput("Close",T[27])
Train.KO:TriggerInput("Open",T[28])
Panel.Ring = T[11]*(1-Train.KZ1.Value)+T[28]
local BD = 1-Train.BD.Value
Train:WriteTrainWire(15,BD*(1-Train.KU9.Value))--Заземление 15 провода
Train.Panel.SD = (S["D1"]+ BO*Train.KU9.Value)*(T[15]*(1-Train.KU9.Value)+BD)
Train.VDZ:TriggerInput("Set",T[16]*BD)
Train.VDOL:TriggerInput("Set",T[31])
Train.VDOP:TriggerInput("Set",T[32])
if not isInt then
Panel.RedLights = BO*KV["10-F1"]
end
Train.Scheme = S
return S
end
function TRAIN_SYSTEM:SolveRKInternalCircuits(Train, dT)
---[[
local RheostatController = Train.RheostatController
local P = Train.PositionSwitch
local RK = RheostatController.SelectedPosition
local B = (Train.Battery.Voltage > 55) and 1 or 0
local T = Train.SolverTemporaryVariables
local BO = min(1,B * Train.VB.Value+T[10])--B * Train.VB.Value
local RUM = Train.KV.RCU
S["RA"] = -T[12]
P:TriggerInput("VP",T[5]*RUM*P.NZ*S["RA"])
P:TriggerInput("NZ",T[4]*RUM*P.VP*S["RA"])
P:TriggerInput("TPT",T[6]*RUM*(1-Train.LK1.Value)*S["RA"])
P:TriggerInput("TPM",T[1]*RUM*(1-Train.M.Value)*S["RA"])
S["2G"]= (T[2]*RUM*((1-Train.RV.Value)*P.TPT*C(1<=RK and RK<=18)+P.TPM*(C(1<=RK and RK<=11 or 14<=RK and RK<=18)+Train.SH1.Value*C(12==RK or RK==19)))+T[3]*RUM*C(RK==13))*(1-Train.RU.Value)
S["2E"] = BO*RUM*(RheostatController.PV2+(C(2<=RK and RK<=20)*(1-Train.M.Value)*(1-Train.LK1.Value)+S["2G"]*Train.LK3.Value)*RheostatController.PV1)
Train.RVpod = BO*RUM*RheostatController.PV2
Train.RUpod = BO*RUM*RheostatController.PV2--+C(2<=RK and RK<=20)*(1-Train.M.Value)*(1-Train.LK1.Value)*RheostatController.PV1)
RheostatController:TriggerInput("RK2",S["2E"]*RheostatController.PV3)
RheostatController:TriggerInput("RK1",S["2E"]*(1-RheostatController.PV3))
Train.RV:TriggerInput("Close",Train.RVuderzh*Train.RVpod)
Train.RV:TriggerInput("Open",(1-Train.RVuderzh))
return S
end
function TRAIN_SYSTEM:SolveInternalCircuits(Train,dT,firstIter)
local T = Train.SolverTemporaryVariables
if not T then
T = {}
for i,v in ipairs(wires) do T[v] = 0 end
Train.SolverTemporaryVariables = T
end
if firstIter then
for i,v in ipairs(wires) do T[v] = min(Train:ReadTrainWire(v),1) end
self:SolveAllInternalCircuits(Train,dT)
else
self:SolveRKInternalCircuits(Train,dT)
end
end
--------------------------------------------------------------------------------
function TRAIN_SYSTEM:SolvePowerCircuits(Train,dT)
--self.ExtraResistanceLK5 = 0--Train.KF_47A["L2-L4" ]*(1-Train.LK5.Value)
--self.ExtraResistanceLK2 = Train.KF_47A["L1-L2"]*(1-Train.LK2.Value)*Train.LK1.Value
if Train.M.Value == 1 then -- PP
local res = Train.ResistorBlocks.R1(Train)
self.R1 = res/2
self.R2 = res/2
self.R3 = 0.0
else
self.R1 = Train.ResistorBlocks.R2C2(Train)
self.R2 = Train.ResistorBlocks.R2C2(Train)
self.R3 = 0.0
end
-- Apply LK3, LK4 contactors
self.R1 = self.R1 + 1e9*(1 - Train.LK2.Value)*(1 - Train.LK3.Value)
self.R2 = self.R2 + 1e9*(1 - Train.LK2.Value)*(1 - Train.LK3.Value)
-- Shunt resistance
self.Rs1 = Train.ResistorBlocks.S1(Train) + 1e9*(1 - Train.SH1.Value)
self.Rs2 = Train.ResistorBlocks.S2(Train) + 1e9*(1 - Train.SH2.Value)
-- Calculate total resistance of engines winding
local RwAnchor = Train.Engines.Rwa*2 -- Double because each set includes two engines
local RwStator = Train.Engines.Rws*2
-- Total resistance of the stator + shunt
self.Rstator13 = (RwStator^(-1) + self.Rs1^(-1))^(-1)
self.Rstator24 = (RwStator^(-1) + self.Rs2^(-1))^(-1)
-- Total resistance of entire motor
self.Ranchor13 = RwAnchor
self.Ranchor24 = RwAnchor
if Train.PositionSwitch.TPM > 0 then -- X
if Train.M.Value == 1 then -- PS
self:SolvePS(Train)
else --PP
self:SolvePP(Train,Train.RheostatController.SelectedPosition >= 17)
end
else -- T
self:SolvePT(Train)
end
-- Calculate current through rheostats 1, 2
self.IR1 = self.I13
self.IR2 = self.I24
-- Calculate induction properties of the motor
self.I13SH = self.I13SH or self.I13
self.I24SH = self.I24SH or self.I24
-- Time constant
local T13const1 = math.max(16.00,math.min(28.0,(self.R13^2) * 2.0)) -- R * L
local T24const1 = math.max(16.00,math.min(28.0,(self.R24^2) * 2.0)) -- R * L
-- Total change
local dI13dT = T13const1 * (self.I13 - self.I13SH) * dT
local dI24dT = T24const1 * (self.I24 - self.I24SH) * dT
-- Limit change and apply it
if dI13dT > 0 then dI13dT = math.min(self.I13 - self.I13SH,dI13dT) end
if dI13dT < 0 then dI13dT = math.max(self.I13 - self.I13SH,dI13dT) end
if dI24dT > 0 then dI24dT = math.min(self.I24 - self.I24SH,dI24dT) end
if dI24dT < 0 then dI24dT = math.max(self.I24 - self.I24SH,dI24dT) end
self.I13SH = self.I13SH + dI13dT
self.I24SH = self.I24SH + dI24dT
self.I13 = self.I13SH
self.I24 = self.I24SH
-- Re-calculate total current and simulate infinite resistance in circuit
if Train.PositionSwitch.TPM > 0 then -- X
if Train.M.Value == 1 then -- PS
self.I13 = self.I13 * Train.LK1.Value * Train.LK2.Value * Train.LK3.Value
self.I24 = self.I24 * Train.LK1.Value * Train.LK2.Value * Train.LK3.Value
self.I24 = (self.I24 + self.I13)*0.5
self.I13 = self.I24
self.Itotal = self.I24
else
self.I13 = self.I13 * Train.LK1.Value * Train.LK2.Value * Train.LK3.Value
self.I24 = self.I24 * Train.LK1.Value * Train.LK2.Value * Train.LK3.Value
self.Itotal = self.I13 + self.I24
end
self.Magnetization = 0
else -- PS -- PT
self.I13 = self.I13 * Train.LK2.Value * Train.LK3.Value
self.I24 = self.I24 * Train.LK2.Value * Train.LK3.Value
self.Itotal = self.I13 + self.I24
local Magnetization = self.Aux750V/750
self.Magnetization = (self.Magnetization+(1-self.Magnetization)*dT*(0.5+Magnetization*1.5))*Train.LK2.Value*Train.LK3.Value
--print(self.Magnetization)
end
-- Calculate extra information
self.Uanchor13 = self.I13 * self.Ranchor13
self.Uanchor24 = self.I24 * self.Ranchor24
----------------------------------------------------------------------------
-- Calculate current through stator and shunt
--print(250*Train.TSH.Value*Train.Electric.Main750V/750*self.Rstator13)
--local RR = math.max(0,(Train.Engines.RotationRate-1500)/1500)
--self.Magnetization = self.Main750V*Train.TSH.Value/8*Train.AV.Value
self.Ustator13 = self.I13 * self.Rstator13--+UshuntAdd*RR
self.Ustator24 = self.I24 * self.Rstator24--+UshuntAdd*RR
self.Ishunt13 = (self.Ustator13) / self.Rs1
self.Istator13 = (self.Ustator13) / RwStator
self.Ishunt24 = (self.Ustator24) / self.Rs2
self.Istator24 = (self.Ustator24) / RwStator
if Train.PositionSwitch.TPT > 0 then
local I1,I2 = self.Ishunt13,self.Ishunt24
self.Ishunt13 = -I2
self.Ishunt24 = -I1
I1,I2 = self.Istator13,self.Istator24
self.Istator13 = -I2
self.Istator24 = -I1
end
-- Calculate current through RT2 relay
if Train.PositionSwitch.TPT > 0 then
self.IRT2 = math.abs(self.Itotal)
else
self.IRT2 = 0
end
-- Sane checks
if self.R1 > 1e5 then self.IR1 = 0 end
if self.R2 > 1e5 then self.IR2 = 0 end
-- Calculate power and heating
local K = 12.0*1e-5
local H = (10.00+(15.00*Train.Engines.Speed/80.0))*1e-3
self.P1 = (self.IR1^2)*self.R1
self.P2 = (self.IR2^2)*self.R2
--self.T1 = (self.T1 + self.P1*K*dT - (self.T1-25)*H*dT)
--self.T2 = (self.T2 + self.P2*K*dT - (self.T2-25)*H*dT)
self.Overheat1 = math.min(1-1e-12,
self.Overheat1 + math.max(0,(math.max(0,self.T1-750.0)/400.0)^2)*dT )
self.Overheat2 = math.min(1-1e-12,
self.Overheat2 + math.max(0,(math.max(0,self.T2-750.0)/400.0)^2)*dT )
-- Energy consumption
self.ElectricEnergyUsed = self.ElectricEnergyUsed + math.max(0,self.EnergyChange)*dT
self.ElectricEnergyDissipated = self.ElectricEnergyDissipated + math.max(0,-self.EnergyChange)*dT
end
local Cosumers = {
LK1 = 0.05,
LK2 = 0.05,
LK3 = 0.05,
SH1 = 0.05,
SH2 = 0.05,
M = 0.05,
RV = 0.02,
PneumaticNo1 = 0.03,
PneumaticNo2 = 0.03,
VDOL = 0.03,
VDOP = 0.03,
VDZ = 0.03,
}
function TRAIN_SYSTEM:Think(dT,iter)
local Train = self.Train
if not self.ResistorBlocksInit then
self.ResistorBlocksInit = true
Train:LoadSystem("ResistorBlocks","Gen_Res_702c")
end
if iter == 1 then Train.ResistorBlocks.InitializeResistances_81_702(Train) end
----------------------------------------------------------------------------
-- Voltages from the third rail
----------------------------------------------------------------------------
self.Main750V = Train.TR.Main750V
self.Aux750V = Train.TR.Main750V*Train.AV.Value
self.Power750V = self.Main750V * Train.GV.Value
----------------------------------------------------------------------------
-- Solve circuits
----------------------------------------------------------------------------
self:SolvePowerCircuits(Train,dT)
self:SolveInternalCircuits(Train,dT,iter==1)
if iter==1 then
--local time = SysTime()
local count = 0
for k,v in pairs(Cosumers) do
count = count + Train[k].Value*v
end
count = count + math.abs(Train.RheostatController.Velocity*0.015)
count = count + math.abs(Train.PositionSwitch.TPSpeed*0.02)
count = count + math.abs(Train.PositionSwitch.ReverserSpeed)
self.Cosume = count
end
----------------------------------------------------------------------------
-- Calculate current flow out of the battery
----------------------------------------------------------------------------
--local totalCurrent = 5*A30 + 63*A24 + 16*A44 + 5*A39 + 10*A80
--local totalCurrent = 20 + 60*DIP
end
--------------------------------------------------------------------------------
function TRAIN_SYSTEM:SolvePS(Train)
-- Calculate total resistance of the entire series circuit
local Rtotal = self.Ranchor13 + self.Ranchor24 + self.Rstator13 + self.Rstator24 +
self.R1 + self.R2-- + self.R3 + self.ExtraResistanceLK2
local CircuitClosed = (self.Power750V*Train.LK1.Value > 0) and 1 or 0
-- Calculate total current
self.Utotal = (self.Power750V - Train.Engines.E13 - Train.Engines.E24)*Train.LK1.Value
self.Itotal = (self.Utotal / Rtotal)*CircuitClosed
-- Total resistance (for induction RL circuit)
self.R13 = Rtotal
self.R24 = Rtotal
-- Calculate everything else
self.I13 = self.Itotal
self.I24 = self.Itotal
self.U13 = self.Utotal*(1/2)
self.U24 = self.Utotal*(1/2)
-- Energy consumption
self.EnergyChange = math.abs((self.Itotal^2)*Rtotal)
end
function TRAIN_SYSTEM:SolvePP(Train,inTransition)
-- Temporary hack for transition to parallel circuits
local extraR = 0.00 --inTransition and 0.909 or 0.00
-- Calculate total resistance of each branch
local R1 = self.Ranchor13 + self.Rstator13 + self.R1 + extraR-- + self.ExtraResistanceLK2
local R2 = self.Ranchor24 + self.Rstator24 + self.R2 + extraR-- + self.ExtraResistanceLK2
local R3 = 0
local CircuitClosed = (self.Power750V*Train.LK1.Value > 0) and 1 or 0
-- Main circuit parameters
local V = self.Power750V*Train.LK1.Value
local E1 = Train.Engines.E13
local E2 = Train.Engines.E24
-- Calculate current through engines 13, 24
self.I13 = -((E1*R2 + E1*R3 - E2*R3 - R2*V)/(R1*R2 + R1*R3 + R2*R3))*CircuitClosed
self.I24 = -((E2*R1 - E1*R3 + E2*R3 - R1*V)/(R1*R2 + R1*R3 + R2*R3))*CircuitClosed
-- Total resistance (for induction RL circuit)
self.R13 = R1
self.R24 = R2
-- Calculate everything else
self.U13 = self.I13*R1
self.U24 = self.I24*R2
self.Utotal = (self.U13 + self.U24)/2
self.Itotal = self.I13 + self.I24
-- Energy consumption
self.EnergyChange = math.abs((self.I13^2)*R1) + math.abs((self.I24^2)*R2)
end
function TRAIN_SYSTEM:SolvePT(Train)
-- Winding resistances
local R1 = self.Ranchor13 + self.Rstator13
local R2 = self.Ranchor24 + self.Rstator24
-- Total resistance of the entire braking rheostat
local R3 = self.R1 + self.R2-- + self.R3
-- Main circuit parameters
local V = self.Power750V*Train.LK1.Value
local E1 = Train.Engines.E13
local E2 = Train.Engines.E24
-- Calculate current through engines 13, 24
self.I13 = -((E1*R2 + E1*R3 - E2*R3 - R2*V)/(R1*R2 + R1*R3 + R2*R3))
self.I24 = -((E2*R1 - E1*R3 + E2*R3 - R1*V)/(R1*R2 + R1*R3 + R2*R3))
-- Total resistance (for induction RL circuit)
self.R13 = R3+((R1^(-1) + R2^(-1))^(-1))
self.R24 = R3+((R1^(-1) + R2^(-1))^(-1))
-- Calculate everything else
self.U13 = self.I13*R1
self.U24 = self.I24*R2
self.Utotal = (self.U13 + self.U24)/2
self.Itotal = self.I13 + self.I24
-- Energy consumption
self.EnergyChange = -math.abs(((0.5*self.Itotal)^2)*self.R13)
end
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