Multi-function controller with protective diodes

This training system is used to study the generation of electricity in modern motor vehicles. Modern compact generators use a monolithic controller, a so-called multi-function controller, which has nowadays largely replaced hybrid controllers. Experiments, each building on the knowledge gained previously, guide trainees towards an understanding of the generation and use of electrical energy in vehicles.

The multi-functional controller provides a variety of capabilities. Like the power zener diodes, it is mounted on a separate board for better educational effect. The following regulator functions should be set up for study and conveyed during the experiment:

Battery sensing

• Voltage regulation direct via terminal "S" and the positive of the battery itself.

Controlled pre-excitation

• Pre-exciter current controlled by the regulator by means of pulse width modulation.

“Alternator rotating” detection

• Exceeding a certain voltage level for a given phase should indicate that the alternator is rotating.

Emergency regulation

• If the battery sensing connection is broken, the controller should switch to emergency regulation via the alternator’s B+ terminal.

Load-response functions

• Two load-response functions are to be studied: Control of load switching for electrical loads during starting and while driving.

Fault display function

• This controls the lamp display depending on the alternator’s operating status.

Alternator monitor light

• This indicates alternator power and improves charging response.