Exam 19: Charging Systems

Testing the voltage regulator circuit by full fielding the alternator is a common diagnostic technique on modern cars.

Late model vehicles with PCM-controlled AC generators can generate more engine power due to decreased magnetic drag caused by the AC generator.

On a B circuit AC generator, the regulator is on the negative side of the circuit.

A technician connects the red lead of a voltmeter to the B+ [output] terminal of an AC generator and the black lead to the battery positive terminal. He starts the engine and turns on all the lights and electrical accessories. What is the technician measuring?

The voltage regulator controls voltage by varying the field current through the rotor.

How does a voltage regulator control AC generator voltage output?

The alternating current produced by the AC generator is rectified into DC (direct current) through the use of ____________________.

What type of test equipment is needed to perform a charging system current output test?

With no electrical load, charging voltage during a voltage output test should be approximately ____________________ volts higher than during an open circuit voltage test.

Which of the following is NOT a way to increase the amount of voltage induced in an AC generator?

AC generators produce overlapping sine waves three-phase voltage.

Technician A uses a current output test to check AC generator output. Technician B uses a voltage output test to check output. Who is correct?

The bearings that support the rotor shaft are located on the ______.

Most newer vehicles do not have a separate voltage regulator and control the output of the charging system through the ____________________.

A zener diode is a special type of diode that blocks the current when the polarity is reversed, but only as long as the voltage is low. When the voltage rises above a critical level, the current can flow through it in a reverse direction.

Technician A says the magnetic field in an AC generator is stationary. Technician B says the rotor in an AC generator is driven by a belt. Who is correct?

Air cooling or liquid cooling is required in an AC generator to maintain the temperature of the _____.

Circuit resistance is checked by connecting a(n) ____________________ to the positive battery terminal and the output, or battery terminal of the AC generator.

A voltage regulator controls the voltage output of an AC generator by controlling the current through the ____________________.

____________________ braking is the process of using the motor/generator to convert kinetic energy into electrical energy to recharge the batteries while slowing the vehicle.