Abstract: In order to solve the problem of high frequency acoustic noise and disability to adjust reference current adaptively when electromagnetic contactors hold with single current feedback control, the multivariate feedback control strategy was proposed. The constraints of forced current rise was analyzed and the feedback variable was established to indicate iron core opening. Thus critical current for holding was automatically found to adapt to parameter variation of contactors and work environment. This idea has general meaning to intelligent control for contactors and changes existing control mode in which the holding current is set beforehand and relies on mechanical structure. The bus voltage feedforward was imported into closed current loop to infer closed-loop duty law. The law is verified its stability for reducing current ripple and harmonic. As result, vibration amplitude and high frequency noise are effectively controlled.A novel control topology with four operation modes, was designed for performing multivariate feedback control strategy.And dynamic combination of demagnetization shortens the time delay when contactors operate from holding to opening under wide range of voltage. Related simulation and experiment prove the effectiveness of the proposed strategy.