A motor servo power driving circuit

Abstract

The invention relates to the technical field of a moving-center-pass antenna, in particular to a motor servo power driving circuit, which comprises a power supply circuit, a main control single-chip microcomputer, a triangular wave generating circuit, a current sampling circuit, a MOSFET driving circuit and a PWM wave generating circuit. The power supply circuit is used for supplying power; The main control single chip microcomputer is used for outputting the control voltage; The triangular wave generating circuit is used for generating a triangular wave signal; The current sampling circuit isused for detecting the current flowing through the circuit in the motor and outputting two detection voltages; the current sampling circuit is used for detecting the current flowing through the circuit in the motor and outputting two detection voltages. The MOSFET driving circuit is used for driving the motor to rotate; The PWM wave generating circuit is used for superimposing the two input detection voltages and the control voltages. The invention generates two limiting signals, compares the two limiting signals with the triangular wave signal, and finally generates two PWM signals and outputs them to a MOSFET driving circuit. The invention has high response speed and high precision.

Description

technical field [0001] The invention relates to the technical field of servo circuits, in particular to a motor servo power drive circuit. Background technique [0002] The satellite communication system is divided into two categories, one is the static communication system, which is mainly used in the reception of satellite digital TV. The second is the mobile satellite communication (i.e., communication in motion) system, which is applied to the communication between the antenna carrier and the satellite that are constantly moving such as vehicles, ships, and aircraft. The former is mainly used in areas where cable digital TV signals cannot be covered, or as the main station for satellite TV signal transmission. In these applications, since the antenna is always in a static state, the fixed satellite antenna receiving system only needs to adjust the azimuth and elevation angles of the antenna so that the antenna is aligned with the satellite, and the satellite signal can ...

AI Technical Summary

Problems solved by technology

This scheme drives the circuit to control the tracking accuracy of the DC motor is relatively poor, and cannot meet the tracking accuracy requirements

At the same time, the software programming requirements are high (poor precision)

[0006] 2. The existing technology is that the control signal output by the motor driver through the MCU is processed directly to drive the DC motor. During the control process, the response speed of the motor cannot keep up, and the tracking performance is poor (poor response speed)

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