Anti-interference motor driving circuit with current protection

Abstract

The invention relates to an anti-interference motor driving circuit with current protection. The anti-interference motor driving circuit comprises a rectification module, a DC / DC pulse constant-current module, a segmented constant-current output module and an anti-interference module. The anti-interference module is connected to a load through a current protection module and comprises a parallel-to-series converter, a filtering unit and a series-to-parallel converter. The output signal of the parallel-to-series converter is input into the series-to-parallel converter via the filtering unit. The output of the series-to-parallel converter is input into the current protection module. According to such structured anti-interference motor driving circuit with current protection, the anti-interference module converts a parallel signal into a series signal by using the parallel-to-series converter so as to achieve good filtering, and converts, by using the series-to-parallel converter, the filtered series signal into the parallel signal for driving control so as to achieve a good anti-interference effect and an overcurrent protection effect. Further, the anti-interference motor driving circuit is provided with an over-temperature protection module so as to be provided with more protection, and has a wide application range.

Description

technical field [0001] The present invention relates to the technical field of integrated circuits, in particular to the technical field of drive circuit protection, in particular to an anti-interference motor drive circuit with current protection. Background technique [0002] In today's society, various electrical equipment are used more and more widely in daily life, and are closely related to people's life. For the motors commonly used in various electrical equipment, it is inevitable to be subject to various interferences during the transmission of the drive signal. Due to the existence of interference, the control signal will be inaccurate, there will be large fluctuations, precise control cannot be achieved, and overcurrent and overload may occur. Interference sources in practical applications are generally divided into external interference and internal interference. The main sources of external interference are: fluctuations in the power grid, start and stop of lar...

AI Technical Summary

Problems solved by technology

However, in the environment of transient high-energy pulse interference, the current drive circuit without an anti-interference circuit is susceptible to external interference. For example, interference will cause the control circuit to receive a false action signal and perform false triggering, causing the load to start instantly. And instantaneous shutdown, poor anti-interference ability, also reduces the service life of various loads

In addition, for overcurrent faults, if the current is too large, if it is not protected and controlled, on the one hand, it will easily cause damage to the equipment itself, and on the other hand, it will easily cause fires, etc., thus posing a huge threat to personal safety and public property.

Images