Modeling and Simulation of Vehicular Power Systems - webfiles its ...

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Figure 8-6 Bus speedAs the bus accelerates, the control system sets the speed of the engine to 1600 rpm andbased on the demanded torque for traction and charging of the battery, the referencetorque of the engine is calculated. It can be seen in figure 8-7 that the power of the engineis opposite to the power of the generator but a little bit higher because of efficiencies ofthe gear box and power electronic converters.54
Figure 8-7 Engine and generator power and speed curveFigure 8-7 also shows the speed and torque characteristic of the engine and generator. Ascan be seen, the speed of the engine jumps between 840 rpm and 1600 rpm. When thereis a power demand the engine speed is set to 1600 RPM and the reference torqueaccording to the demanded power and engine constraints is calculated. The jumps in thespeed of the engine and generator are because of the dynamics of the generator –engineset which has been modeled by a first order system considering the inertia of thegenerator-engine set.Figure 8-8 shows the performance of electric traction motor. Once the vehicle acceleratesthe torque of the motor is maximum as the speed reaches the maximum speed. In thecycle the acceleration is zero so the motor power suddenly decreases because it does nothave to overcome the inertia of the vehicle and accelerate the total weight of it. It can alsobe seen that during the deceleration the power is negative which indicates that energy isbeing fed back to the motor to charge the batteries. The traction power and efficiencyincludes the efficiencies of gear box and power electronics.55
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AhaModeling and Simulation of Vehic
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To my parents, brother and my love
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Table of ContentsAcknowledgment....
Page 9 and 10:
List of FiguresFigure 2-1: Oil cons
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List of TablesTable 3-1 List of som
Page 14 and 15:
xii
Page 16 and 17:
Chapter 4 discusses the dynamics of
Page 18 and 19: The Other environmental effects of
Page 20 and 21: So a modeling tool being able to de
Page 22 and 23: electric motor to provide the tract
Page 24 and 25: Figure 2-8: Configuration of a para
Page 26 and 27: Vehicle system modeling can be done
Page 28 and 29: Figure 3-2: EMTS solution flow-char
Page 30 and 31: Figure 4-2: The deflection of tyre
Page 32: V −Vwheel actualλa=( 4-9)VwheelV
Page 35 and 36: Figure 4-5 Friction coefficient cha
Page 37 and 38: The gear box consists of different
Page 39 and 40: Where• I = discharge current [amp
Page 41 and 42: decreases very rapidly. In electric
Page 43 and 44: Thus, this simulation model is capa
Page 45 and 46: VOCRchargeRdischargeSOCTempSOCQmaxT
Page 47 and 48: Figure 5-8 Battery open circuit vol
Page 49 and 50: Figure 5-11 Charging resistance ver
Page 51 and 52: 6 Engine, electric machine and cont
Page 53 and 54: 4 Idle speed 840 rpm5 Peak power 15
Page 55 and 56: 7 Modeling in Simulink/MatlabOnce t
Page 57 and 58: Figure 7-3 Vehicle dynamics block i
Page 59 and 60: 7.3 EngineAs described in Chapter 5
Page 61 and 62: Figure 7-7 Automatic driver model b
Page 63 and 64: 8 Simulation ResultsIn this chapter
Page 65 and 66: Peak generator torque1074 N.mPeak g
Page 67: Figure 8-5 Wheel speed and translat
Page 71 and 72: Figure 8-9 Battery state of charge
Page 73 and 74: 9 ConclusionRegarding the significa
Page 75 and 76: References[1] Shuo Tian, Guijun Cao
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