Direct current generator excitation controller

Abstract

The invention discloses a direct current generator excitation controller which comprises a voltage regulator, a PID controller and a power amplifier, wherein the voltage regulator, the PID controllerand the power amplifier are connected in sequence. The output end of the power amplifier is connected with an excitation winding of a direct current generator. The output end of the direct current generator is connected with the PID controller through a feedback regulator. The feedback regulator detects the output voltage of the direct current generator. The output voltage is input to the PID controller for adjustment with the reference voltage outputted by the voltage regulator, and then is outputted to the excitation winding of the direct current generator through the power amplifier. The output voltage of the direct current generator is controlled through excitation adjustment. According to the invention, the problems of large ripple and easy loss of a traditional excitation controllerare overcome; and the direct current generator excitation controller has the advantages of reduced circuit cost, improved reliability, high output voltage precision, long-time, safe and stable work, safety and reliability.

Description

technical field [0001] The invention relates to the field of DC generator control, in particular to a DC generator excitation controller. Background technique [0002] When the DC generator supplies power, the load is always changing, and the output voltage of the generator will also change when the load changes, which will cause impact on the electrical equipment. Therefore, it is necessary to control the output voltage of the DC generator to keep it in a stable range. [0003] The existing DC generator output voltage control system mainly includes a PWM regulator and a carbon voltage regulator. The PWM regulator adjusts the excitation current by adjusting the duty ratio of the output waveform to adjust the output voltage of the generator, but the PWM regulator cannot Realize smooth adjustment, so that the excitation voltage fluctuates up and down; the carbon voltage regulator forms a resistance loop through the carbon, and changes its resistance by controlling the contact...

AI Technical Summary

Problems solved by technology

[0003] The existing DC generator output voltage control system mainly includes a PWM regulator and a carbon voltage regulator. The PWM regulator adjusts the excitation current by adjusting the duty ratio of the output waveform to adjust the output voltage of the generator, but the PWM regulator cannot Realize smooth adjustment, so that the excitation voltage fluctuates up and down; the carbon voltage regulator forms a resistance loop through the carbon, and changes its resistance by controlling the contact area with the carbon, so that the excitation current changes. However, due to the high temperature of the carbon resistance Working under the environment, the carbon sheet is prone to burning, which will increase the surface contact resistance and affect the stability of the output voltage.

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