Low-cost Ripple-to-square Wave Conversion Strategy Based on Motor Bus Current
In order to reduce the cost of anti-pinch control of automobile products,the ripple conversion technology in the key technology of ripple anti-pinch was studied.A low-cost hardware ripple-square wave conversion scheme was proposed.The sampling circuit,differential circuit and filtering circuit were designed by using low-cost capacitance and resistance to effectively filter out high-frequency noise and DC components in the signal.At the same time,in order to further reduce the hardware cost,a low-cost ripple-to-square wave conversion scheme based on software was proposed.The hardware functions such as filtering,differen-tial,and comparator were realized through software processing,thereby achieving low-cost ripple-to-square wave conversion.Finally,the experiment shows that in the normal operation stage,the ripple conversion scheme based on hardware and the ripple conversion scheme based on software can realize the ripple-square wave conversion,and there is basically no error conversion problem.In the motor start-up phase,there are two false conversions in the hardware ripple conversion scheme,and four false conversions in the software ripple conversion scheme,which are far less than the allowable error of the system.Both low-cost conversion schemes can meet the system requirements.
current rippleripple-square wave conversionanti-pinch controlelectrical machinery
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维普
