Simulation of Drive Trains and Energy Storage

In SPWM, increasing the carrier frequency while keeping the reference frequency constant will:

• Decrease output voltage

• Reduce harmonic distortion

• Increase switching losses

• Both B and C

In MATLAB Simulink, the _______ block is commonly used to simulate the interaction between tire and road in the vehicle dynamics model.

Answer explanation

tire[magic formula]

When using an RL load in a controlled rectifier, the output waveform becomes purely sinusoidal.

• True

• False

Which factor does not influence the transition point from Constant Current to Constant Voltage mode in lithium-ion battery charging?

• State of charge

• Terminal voltage

• Internal resistance

• Ambient humidity

Why is a NOT gate used in the SPWM circuit for a three-phase inverter?

Answer explanation

To generate complementary gating signals for the lower switches of each leg of the inverter.

Which waveform acts as the carrier in a sinusoidal PWM implementation?

• Sine wave

• Square wave

• Triangular wave

• Sawtooth wave

The vehicle speed in a dynamic simulation is influenced by both road load and applied torque.

• True

• False

The output voltage in a single-phase inverter becomes more sinusoidal when a _______ filter is used at the output.

Answer explanation

low pass

Explain briefly why measuring THD is essential in inverter simulation.

Answer explanation

THD indicates the level of distortion in the output waveform, affecting power quality and equipment performance.

Which component in the SPWM inverter circuit is responsible for switching the DC voltage to generate AC output?

• Diode

• Resistor

• MOSFET

• Comparator