Purpose. Development of analytical expressions which allow determining the relation between the parameters and voltage amplification factor of the converter for impulse frequency-current slip-power recovery scheme. Methodology. Solution of a set of second order linear differential equations based on the analysis of transients under switching of power gates in the converter for impulse frequency-current slip-power recovery scheme. Findings. A system of electric drive for impulse frequency-current slip-power recovery scheme is proposed. It combines positive features of classic system for impulse control and slip-power recovery scheme with improved performances of power efficiency. The calculation procedure for amplification factor and parameters of the frequency-current slip-power recovery drive is developed. At desired voltage amplification factor, it allows finding transformation ratio for matching transformer. The expression is obtained which allows determining the minimum value of the time delay of the inverter of the converter, at which a stable operation during start-up is provided. The dependence of voltage amplification factor on equivalent resistance of the converter for frequency-current slip-power recovery scheme is found. Originality. The relation between voltage amplification factor and equivalent resistance value of the converter for frequency-current slip-power recovery scheme which allows determining its best level of energy efficiency is established. Practical value. The procedure for preliminary determination of the parameters of the converter for frequency-current slip-power recovery scheme is developed. It allows selecting the value of voltage amplification factor of the converter rationally and finding transformation ratio for matching transformer. The expression is obtained which allows determining the minimum value of the time delay of the inverter of the converter, at which a stable operation during start-up is provided. These findings can be used in engineering design of the converter for frequency-current slip-power recovery scheme both for high-voltage electric drives applied in stationary fan installations for the main lines of mine ventilation and low-voltage drives for materials-handling machines.

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