High-low voltage area signal transmission system

Abstract

A high-low voltage area signal transmission system is used for reducing power consumption of high-low voltage area signal transmission and comprises a logic generation circuit, a first delay generation circuit, a second delay generation circuit, a pulse edge collecting circuit, a high-low voltage area signal transmission circuit, a burr filtering circuit, a state latch circuit, an upper bridge output driving circuit and a lower bridge output driving circuit. The state latch circuit is respectively connected with the burr filtering circuit and the upper bridge output driving circuit, when receiving a first high electrical level, the state latch circuit controls the upper bridge output driving circuit to be turned on, and when receiving a second high electrical level, the state latch circuit controls the upper bridge output driving circuit to be turned off. The lower bridge output driving circuit is turned on or turned off according to a second delay control signal. Therefore, the high-low voltage area signal transmission system can reduce power consumption, moreover, after dead time is built in the system, the circuits are simplified, the anti-interference capacity is improved, and therefore the high-low voltage area signal transmission is more reliable.

Description

technical field [0001] The invention relates to a signal transmission technology in a high and low voltage area, in particular to a signal transmission system in a high and low voltage area with low power consumption. Background technique [0002] In the motor drive circuit, the motor drive signal provided by the single-chip microcomputer cannot directly drive the field effect tube with a power supply voltage of tens of volts or even hundreds of volts due to the limitation of the working voltage of the single-chip microcomputer. Therefore, the traditional discrete component drive scheme provides a signal transmission technology in the high and low voltage area. At present, it is widely used in motor drives, especially the motor drives represented by electric vehicle motor drives and bladeless fan motor drives. For example, in the traditional high and low voltage area signal transmission technology, 15V DC is used to power the drive circuit, Vdc is used to supply power to th...

AI Technical Summary

Problems solved by technology

This kind of circuit design consumes a lot of power, the driving circuit is prone to failure, the consistency is relatively poor, and the anti-interference performance of the driving circuit is poor.

In addition, there are many devices used in the drive circuit of discrete devices, occupying a large PCB area, and complex processing and maintenance.

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