A kind of pwm power amplifier applied to antenna

A power amplifier and antenna technology, applied in amplifiers, amplifiers with semiconductor devices/discharge tubes, electrical components, etc., can solve the problems of low reliability and poor anti-interference performance, and achieve high reliability and strong anti-interference ability. , the effect of simple structure

Active Publication Date: 2016-08-17
LUOYANG NORMAL UNIV
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AI Technical Summary

Problems solved by technology

For example: an H-bridge motor controller (201010524194) that supports unipolar and bipolar pulse width modulation control, which is mainly implemented in software. The disadvantage is that the software method has low reliability and poor anti-interference performance

Method used

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  • A kind of pwm power amplifier applied to antenna
  • A kind of pwm power amplifier applied to antenna
  • A kind of pwm power amplifier applied to antenna

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Embodiment Construction

[0029] like figure 1 As shown in , the parallel power compensation module of the azimuth motor is spatially independent from the power amplifier body, and the two are electrically connected through a connector. In this way, under the condition that the power of the selected switching device remains unchanged, the driving power of the azimuth motor is doubled, which is beneficial to reducing the area of ​​the heat sink of the power amplifier and correspondingly reducing the weight and volume of the power amplifier. Similarly, if necessary, a parallel power compensation module can also be added to the pitch motor and roll motor.

[0030] The circuit principles of the azimuth 1, pitch 2 and roll 3 channels are exactly the same.

[0031] like figure 2 As shown, the output of filter and input amplifier 1 is connected to the input of subtractor 2, meanwhile, the speed negative feedback signal and local voltage negative feedback signal are respectively connected to the input of su...

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Abstract

A PWM power amplifier applied to the antenna, which converts the rotation control signal into amplified electric power to drive the motor to rotate. The power amplifier adopts PWM pulse width modulation mode, and the antenna servo system adopts three closed-loop control systems of voltage, speed and position. The power compensation module is used as the parallel compensation output port of the azimuth axis of the power amplifier to increase the driving capability of the azimuth axis. A set of power amplifiers has three independent power amplification channels, namely azimuth channel, pitch channel and roll channel, which respectively amplify and output the control signal with PWM power, and finally output to three DC servo motors of azimuth, pitch and roll. In this way, a set of power amplifiers is fully adapted to the three-direction servo control of the radar antenna, thereby simplifying the design of the antenna control system.

Description

technical field [0001] The invention relates to the field of amplifiers, in particular to a PWM power amplifier applicable to various types of radar antennas, satellite communication antennas, satellite antennas in motion and the like. technical background [0002] At present, for high-power motor speed control systems, it is mainly realized by increasing the power of a single power tube, but high-power switching tubes, especially domestic high-power switching tubes, due to complex manufacturing processes, difficult manufacturing, poor reliability, and high cost , Therefore, the application of domestic high-power switching devices has been limited. In addition, the existing PWM power amplifier is mainly in the form of microcontroller software, and the phenomenon of program crash may occur. [0003] The working mode of the H-bridge reversible PWM conversion circuit used in the existing amplifier: the current pulsation of the bipolar mode is large, and there is a phenomenon o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F3/217
Inventor 周涛张丽陈军王希娟张莉莉李玲
Owner LUOYANG NORMAL UNIV
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