Dual-power on-off control circuit for servo system

Abstract

The invention relates to a dual-power on-off control circuit for a servo system, belongs to the technical field of servo control and is used for solving the problem that the servo system may generate misoperatioin due to the inconsistency of the dual power supply cut-off time sequence. The circuit comprises a driving power supply, a digital power supply, an analog power supply, an on-off controller, and a driving circuit; the on-off controller outputs a control signal to control the driving circuit according to the detected on-off state of the digital power supply and the on-off state of the analog power supply; the driving circuit is switched on to drive a power supply to drive a motor to rotate, or the driving circuit is switched off to drive the power supply to stop the motor from being driven to rotate. The dual-power on-off control circuit for the servo system solves the problem of servo system malfunction caused by different voltage drop time of the two control power supplies due to the influence of resistance-capacitance characteristics of an analog circuit and a digital circuit when the two control power supplies are simultaneously powered off.

Description

technical field [0001] The invention relates to the technical field of servo control, in particular to a dual power supply on-off control circuit for a servo system. Background technique [0002] In some servo control systems, the power supply generally includes two circuits: control power supply and drive power supply. In some special working conditions, the control power supply also includes two circuits: digital power supply and analog power supply, such as figure 1 shown. In order to ensure the normal operation of the system and prevent malfunctions caused by power-on and power-off sequences, the general power-on sequence is: first add the control power and then the drive power; the power-off sequence is generally: first cut off the drive power and then cut off the control power . In order to simplify the operation process and improve system reliability, it is the optimal solution to power on and power off at the same time. However, when the two control power supplie...

AI Technical Summary

Problems solved by technology

However, when the two control power supplies are powered off at the same time, due to the influence of the resistance-capacitance characteristics of the analog circuit and digital circuit, the voltage drop time of the two control power supplies is different.

This will make the analog circuit or the digital circuit in the "non-working" working condition at different times. If the drive part is still in the power-on state at this time, the servo control system will malfunction due to the digital circuit or the analog circuit being in the "non-working" working condition.

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