Diesel Gen-set Operation Instructions
10
Figure 3-3 Alternator operating principles schematic diagram
3. Automatic voltage regulator (AVR)
AVR of Weichai alternator is a half-wave phased thyratron type automatic voltage
regulator and one part of alternating-current brushless alternator excitation system.
Except regulating voltage of alternator, AVR is equipped with low-speed and
no-detection signal protection function, in order to ensure that alternator is controlled
in a safe and reliable way.
Weichai 10-50kW Gen-set is equipped with AS440, BE350, AS480 type AVR (type
of AVR is clearly marked on nameplate of alternator). Structure and function of AVR
are described below respectively.
Permanent magnet alternator
(optional)
Permanent magnet rotor (rotor)
Permanent magnet
alternator (armature)
Excitation stator
(magnetic field)
Rotary rectifier (three-phase
full wave rectifier)
Main rotor (magnetic
field)
Excitation rotor
(armature)
Rotating part
Three-phase alternating
current (output)
Three-phase alternating
current (output)
Excitation field (direct
output)
Main stator (armature)
Input signal-single item (voltage regulator input power)
Detection input
Automatic voltage
regulator (AVR)
