(1) main generator stator excitation power supply,The generator voltage regulator（AVR）Adjust voltage type generator principle: the relationship between working parts, to Stanford BC generator as an example.

Figure 1 BC series generator nameplate marking meaning

As shown in figure 2.

Figure 2 generator principle

Host by force of the stator LIXISE SX460 (SX440 MX321) AVR provide electricity for exciter magnetic field.The generator voltage regulator,AVR) is for adjusting the exciter excitation current control device.AVR to from host winding voltage induction signal feedback, by controlling the exciter magnetic field of the low power, adjust the rectifier output power of excitation electromechanical pivot, so as to achieve control of the host of magnetic current requirements.

LIXISE SX460 (SX440 \ MX341 \ MX321) AVR through induction two-phase average voltage, ensure that the voltage regulation.In addition, it also monitoring the speed of the engine, such as set below the primary speed (frequency), the output voltage is reduced, in order to prevent the engine at low speed when the excitation, and reduce the impact of load, to relieve the burden of the engine.In addition, if SX460AVR built-in circuit connected to the attachment to use, can make the generators in the "drop" or "floating" control and VAR (reactive power)/PF (power factor) under the control and transport MX421 besides SX440 characteristic, also has the characteristics of RMS of three-phase induction, with external circuit breaker (load) on the switch board, provides overvoltage protection.

(2) provide the AVR auxiliary winding excitation power generator principle: the relationship between the components as shown in figure 3.

Figure 3 auxiliary winding excitation generator

The auxiliary winding supply power to the exciter through SX460AVR magnetic field.And AVR detection output voltage and accordingly and setting the voltage difference between adjust the excitation current of exciter.In fault cases, secondary line winding through SX460AVR from the host in the stator core harmonic component of the magnetic field induction and provide the necessary electrical current, in order to maintain the short circuit current.

(3) generator transformer control: the host of the stator through the transformer rectifier module provides power for exciter magnetic field.Output voltage and current transformer will be from the host of the stator of combining self adjusting voltage or voltage open-loop control system.The system can automatically compensate the load varies excitation current, or power factor has better starting ability, and can provide continuous short-circuit current.Three-phase ac generators typically take control of three-phase transformer to improve the running situation of unbalanced load.Single-phase transformer is optional.There is no attachment transformer control system.As shown in figure 4.

(4) permanent magnet generator (PMG) excitation - AVR control voltage generator works: as shown in figure 5 a 16.

Permanent magnet generator through MX341 "or MX321) AVR offers exciter excitation source, AVR is for adjusting the exciter current control device. If it is MX321 AVR, by an isolation transformer induction signal from the host of the stator winding voltage feedback, through low power exciter magnetic field control, regulate the exciter

Figure 4 transformer generator voltage regulator

Figure 5 permanent magnet generator (PMG) excitation - AVR working principle of the control voltage of the generator

The rectifier output power of the armature, so as to control the host field current requirements.

PMG system provides a constant has nothing to do with the load of the stator excitation source, provide higher motor starting capacity, and by the nonlinear load (such as thyristor dc motor) produced by the host of the stator output voltage waveform distortion has anti-jamming.

Average MX341 AVR by examining two phase voltage to ensure the high voltage regulation, it also monitor engine speed, such as less than primary speed setting, the output voltage is reduced, in order to prevent the engine at low speed when the wound, reduce the impact of load, to relieve the burden of the engine.It also provides delay of excitation protection, the exciter magnetic field under the condition of high voltage of generator excitation reduction or drop-out.

MX321 in addition to providing MX341 】 with the protection of the engine load reduction properties, but also has the characteristics of the three-phase RMS detection and overvoltage protection.

AVR attachments.SX440 SX460, MX341 and MX321 if built-in circuit connected to the attachment using AVR, can make the generators in the "drop" or "floating" control, VAR (reactive power)/PF (power factor) under the control of parallel operation;MX321AVR can also provide short circuit current limit control.MX321 can also provide short circuit current limit control.

LIXISE SX460 generator voltage regulator regulatorGraph:

LIXISE MX321 generator adjustable clampGraph: