DGC Brushless Excitation - Emerson Process Management
DGC Brushless Excitation - Emerson Process Management
DGC Brushless Excitation - Emerson Process Management
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<strong>DGC</strong> <strong>Brushless</strong> <strong>Excitation</strong><br />
System Description<br />
3.6 Power Amplifiers<br />
The Power Amplifiers come in either a drawer-mounted version or a panel-mounted version. Both<br />
versions consist of two basic components: a firing circuit and a rectifier bridge.<br />
The firing circuit generates the firing pulses to control the SCR’s in the rectifier bridge. The demand<br />
signal to the trigger circuit is the summation of the DC control signals from the <strong>DGC</strong> and the Base<br />
Adjuster.<br />
The rectifier bridge uses SCRs to convert 3-phase AC into DC current. The SCR’s pass current<br />
flow in response to the gating pulses from the firing circuitry. The output current can be controlled<br />
from zero to maximum amps. An alarm is provided to alert the operator of a problem with the<br />
rectification process.<br />
Integrated Power Amplifier<br />
© <strong>Emerson</strong> <strong>Process</strong> <strong>Management</strong> Power & Water Solutions. - 11 -<br />
PWS_005075 [3]
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