MOTOROLA MVME162-210 VME board

MOTOROLA MVME162-210 VME board

MOTOROLA MVME162-512 Motorola current is induced onto the stator for load output
The MOTOROLA MVME162-512 shunt method is characterized by simple design, high cost efficiency, and can provide input power for AVR. This method does not require additional components or wiring. When problems arise, fewer components and wiring need to be verified, simplifying troubleshooting.
As the generator rotates, the stator provides input voltage to the AVR. In addition, the AVR is equipped with sensors to monitor the stator output.
The AVR supplies power to the exciter and rectifies it to DC current. The current is induced onto the stator for load output.
The biggest drawback of this system is that the AVR is affected by the load supplied by the generator. As the load increases, the voltage begins to decrease, and the AVR must provide more current to the exciter to support the demand. This pushed AVR to its limit. If AVR is pushed beyond its limit, the excitation field will collapse. The output voltage decreases to a very small amount.
If there is a short circuit in the AVR power supply, the generator will have no excitation source. This leads to a loss of generator power output.
Generators with shunt or self excitation methods can be used for linear loads (constant loads). For generators using this excitation method, the use of nonlinear loads (variable loads) is not recommended. Harmonics related to nonlinear loads can cause breakdown of the excitation magnetic field.

Incentive Enhancement System (EBS)
The MOTOROLA MVME162-512 system consists of the same basic components that provide input to and receive output from the AVR. The additional components in this system include:
Excitation Enhancement Control (EBC) Module
Excitation Booster Generator (EBG).
EBG is installed on the drive end of the AC generator. The physical appearance is the same as a permanent magnet. When the generator shaft rotates, the EBG supplies power to the controller.
The MOTOROLA MVME162-512 control module is connected in parallel to the AVR and exciter. EBC receives signals from AVR. When needed, the controller provides different levels of excitation current to the exciter according to the needs of the system.
The additional power supply of the excitation system supports the load requirements. This allows the generator to start and restore excitation voltage.
This excitation system is not recommended for continuous power applications. It is used for emergency or backup power applications. When the generator starts, the EBS system disengages until it reaches operating speed. EBG is still generating electricity, but the controller does not send it.
The system allows for dynamic response, lower cost, and meets the requirement of providing 300% short-circuit current. Compared with shunt or self excitation methods, nonlinear loads (such as motor starting) have been improved.

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