A method for controlling an electrical multi-phase converter, the electrical multi-phase converter comprising at least two phase branches for providing at least two output voltages, wherein each phase branch comprises at least one converter cell each supplied with a respective supply voltage (Us_mn), and the at least two phase branches are adapted for converting the supply voltages ( U S_mn) into the at least two output voltages, the method comprising: determining for each converter cell a respective supply voltage ( U S_mn), wherein the supply voltages (Us_mn) are measured and/or are received from a model; determining a potential zone for each phase branch based on the at least one supply voltage (Us_mn) of the at least one converter cell of the phase branch, wherein the potential zone is bounded by a maximal available voltage (U S_m) and a negated maximal available voltage and bounds a possible actual phase voltage producible by the phase branch, wherein the maximal available voltage (U S_m) for the phase branch is the sum of the absolute values of the supply voltages (U S_mn) of the converter cells of the phase branch; receiving a reference voltage ( U r_m) for each phase branch; characterized by if the reference voltage ( U r_m) for a phase branch is not within the potential zone of the phase branch: determining an excess voltage for the phase branch, the excess voltage being a difference between the reference voltage ( U r_,m) and a violated bound of the potential zone, the violated bound being the maximal available voltage (U S_m) or the negated maximal available voltage; modifying the reference voltages ( U r_m) into modified reference voltages ( U r _ m ′) for the phase branches by subtracting the excess voltage from the reference voltages ( U r_m) of the phase branches; controlling the electrical multi-phase converter based on the modified reference voltages ( U r _ m ′) of each of the phase branches such that a minimal common mode voltage between the output voltages of the multi-phase converter is generated. determining for each converter cell a respective supply voltage ( U S_mn), wherein the supply voltages (Us_mn) are measured and/or are received from a model; determining a potential zone for each phase branch based on the at least one supply voltage (Us_mn) of the at least one converter cell of the phase branch, wherein the potential zone is bounded by a maximal available voltage (U S_m) and a negated maximal available voltage and bounds a possible actual phase voltage producible by the phase branch, wherein the maximal available voltage (U S_m) for the phase branch is the sum of the absolute values of the supply voltages (U S_mn) of the converter cells of the phase branch; receiving a reference voltage ( U r_m) for each phase branch; characterized by if the reference voltage ( U r_m) for a phase branch is not within the potential zone of the phase branch: determining an excess voltage for the phase branch, the excess voltage being a difference between the reference voltage ( U r_,m) and a violated bound of the potential zone, the violated bound being the maximal available voltage (U S_m) or the negated maximal available voltage; modifying the reference voltages ( U r_m) into modified reference voltages ( U r _ m ′) for the phase branches by subtracting the excess voltage from the reference voltages ( U r_m) of the phase branches; controlling the electrical multi-phase converter based on the modified reference voltages ( U r _ m ′) of each of the phase branches such that a minimal common mode voltage between the output voltages of the multi-phase converter is generated. determining an excess voltage for the phase branch, the excess voltage being a difference between the reference voltage ( U r_,m) and a violated bound of the potential zone, the violated bound being the maximal available voltage (U S_m) or the negated maximal available voltage; modifying the reference voltages ( U r_m) into modified reference voltages ( U r _ m ′) for the phase branches by subtracting the excess voltage from the reference voltages ( U r_m) of the phase branches; controlling the electrical multi-phase converter based on the modified reference voltages ( U r _ m ′) of each of the phase branches such that a minimal common mode voltage between the output voltages of the multi-phase converter is generated.