Method and system for controlling state switching of switch, and control chip

Abstract

The invention provides a method and system for controlling the state switching of a switch, and a control chip. The method includes: when receiving a switching instruction sent from outside, a controlchip determines the current on-off state of a controlled end; determining whether the current on-off state is an off state, if so, controlling the controlled end to switch the on-off state when it isdetermined that the target power supply zero-crossing point of an AC power supply is reached, otherwise, according to a predetermined current lag voltage phase angle corresponding to the controlled end, the target power supply zero-crossing point, and the target power frequency of the AC power supply when the target power supply crosses the zero point, determining a control time point, and controlling the controlled end to switch the on-off state when it is determined that the control time point is reached. In this way, the controlled end can be turned on when the AC voltage crosses zero, andis turned off when the current crosses zero to reduce the electromagnetic interference caused by state switching. Therefore, the solution can alleviate the electromagnetic interference problem.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a method and system for controlling switch state switching and a control chip. Background technique [0002] When the control chip receives the switching instruction, it can control the switching of the controlled terminal. For example, when the control chip receives the switching instruction, if the four-way valve of the inverter air conditioner is currently on, the control chip can control the four-way valve to turn off, otherwise, the control chip can control the four-way valve to turn on. [0003] At present, once the control chip receives the switching instruction, it directly outputs the switching instruction to the controlled terminal to switch the switching state of the controlled terminal. [0004] Since the controlled terminal switches at different times will generate different degrees of electromagnetic interference, the existing implementation methods are likely ...

AI Technical Summary

Problems solved by technology

[0004] Since the controlled terminal switches at different times will generate different degrees of electromagnetic interference, the existing implementation methods are likely to cause electromagnetic interference problems

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