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Automatic voltage regulator for generator

An automatic voltage and generator technology, which is applied to control the direction of the generator through the change of the magnetic field, can solve the problems of not being able to identify the output voltage distortion, limit the use range of the generator, etc., and achieve the effect of improving the voltage waveform distortion

Inactive Publication Date: 2010-05-12
黄金亮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Waveform distortion limits the scope of use of the generator
[0008] 2. The sampling method of the signal is rectification and inertial filter filtering, and only the signal proportional to the peak value of the output voltage can be detected
[0012] Since the output of the sampling circuit is only related to the peak value of the generator output voltage, it cannot identify the distortion of the output voltage

Method used

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  • Automatic voltage regulator for generator
  • Automatic voltage regulator for generator
  • Automatic voltage regulator for generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1, such as figure 1 As shown in the basic structural block diagram of the sinusoidal regulation AVR of the present invention, the high-fidelity AC transient signal sampler samples the output voltage of the generator in real time, and obtains a real-time voltage signal that can reflect the change of the output AC voltage waveform. This high-fidelity AC transient signal The sampler has good real-time performance, and the signal delay is only a few microseconds. Design a "sinusoidal reference voltage signal source" that is consistent with the output voltage phase, and its phase and period are consistent with the voltage signal output by the generator Consistent, its amplitude conforms to the sinusoidal law at any angle; the synchronous signal generator generates phase control signals and period control signals according to the output of the aforementioned AC transient signal sampler, and these signals are supplied to the aforementioned sinusoidal reference voltage s...

Embodiment 2

[0035] Example 2, such as image 3 Shown, the block diagram of the sinusoidal regulation AVR of the generator of the present invention. In the figure, the upper part represents the core part of Benming. Other parts increase the intelligent control function of the generator.

[0036] The high-fidelity transient signal sampler is characterized in that its input is the AC voltage output by the generator, and its output is the aforementioned figure 2 The signal in waveform B. Its principle circuit is as Figure 4 As shown, the feature in the figure is that the input high voltage passes through R42 and R48, and after being rectified by D13 and D14, it is sent to the differential voltage amplifier IC1 to realize the detection of the AC signal by the single-voltage operational amplifier, and the output from R51 has no distortion and delay AC sampling signal of small signal.

[0037] The signal of the differential amplifier is also sent to the comparator IC2 to generate a zero-c...

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PUM

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Abstract

The invention relates to an automatic voltage regulator for a generator, which comprises a high-fidelity alternating current transient signal sampler, a synchronous signal generator, a sinusoidal reference voltage signal source, an excitation regulator and an excitation driving circuit, wherein the high-fidelity alternating current transient signal sampler samples the output voltage of the generator in real time to obtain a real-time voltage signal capable of reflecting the change of the waveform of the output alternating current voltage and input the real-time voltage signal into the synchronous signal generator and the excitation regulator at the same time; the synchronous signal generator generates a synchronous signal according to the output of the high-fidelity alternating current transient signal sampler and sends the synchronous signal to the sinusoidal reference voltage signal source; the sinusoidal reference voltage signal source generates a sinusoidal reference voltage reference; the excitation regulator regulates an excitation current according to the output of the received output of the high-fidelity alternating current transient signal sampler and the output of the sinusoidal reference voltage signal source; and the excitation driving circuit drives according to the output of the excitation regulator. The automatic voltage regulator for the generator realizes the control of the waveform and amplitude of an output voltage; and the distortion of the waveform of the voltage output by the automatic voltage regulator is relieved greatly.

Description

technical field [0001] The invention relates to a generator automatic voltage regulator for sinusoidal regulation of generators. Background technique [0002] Generators generally use AVR (Automatic Voltage Regulator, automatic voltage regulator) to adjust the output voltage level and stabilize the output AC voltage within a certain range through adjustment. [0003] In existing generators, the generator uses the AVR to adjust the excitation current of the excitation winding, thereby adjusting the magnetic field strength of the generator, and then adjusting the level of the output voltage. [0004] The existing AVR can be called "peak regulated AVR". The principle is that after rectifying and filtering the sampled AC voltage, a DC voltage signal proportional to the peak value is obtained, and the voltage is compared with the reference DC voltage to control the excitation PWM. (Pulse Width Modulation, pulse width modulation) duty cycle, so that the excitation current changes...

Claims

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Application Information

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IPC IPC(8): H02P9/26
Inventor 黄金亮
Owner 黄金亮