A braking chopper assembly, comprising: at least two chopper units (110, 410); and wherein each of the chopper units includes a controlling unit (211, 411), the controlling unit (211, 411) configured to generate a control signal for controlling an activation of the corresponding chopper unit in cycle, wherein the activations of the at least two chopper units (110, 410) are controlled by the controlling unit (211, 411) to be either initially offset by a phase shift or adjusted to have a phase shift after a predefined time duration, the phase shift indicating a time difference between rising edges or between falling edges of respective pulses of different signals and wherein the controlling unit (211, 411) further comprises: a reference unit configured to generate a reference signal; and a phase controlling unit configured to control the phase shift of the control signal, and wherein the phase controlling unit of at least one of the chopper units (110, 410) is configured to control the phase shift of the control signal for the corresponding chopper unit (110, 410) based on the reference signal for the corresponding chopper unit (110, 410) and the control signal for a different chopper unit (110, 410) and wherein the controlling units (211, 411) of the chopper units (110, 410) are connected such that a connection of the controlling units can turn from open to closed connection and /or from closed to open connection. at least two chopper units (110, 410); and wherein each of the chopper units includes a controlling unit (211, 411), the controlling unit (211, 411) configured to generate a control signal for controlling an activation of the corresponding chopper unit in cycle, wherein the activations of the at least two chopper units (110, 410) are controlled by the controlling unit (211, 411) to be either initially offset by a phase shift or adjusted to have a phase shift after a predefined time duration, the phase shift indicating a time difference between rising edges or between falling edges of respective pulses of different signals and wherein the controlling unit (211, 411) further comprises: a reference unit configured to generate a reference signal; and a phase controlling unit configured to control the phase shift of the control signal, and wherein the phase controlling unit of at least one of the chopper units (110, 410) is configured to control the phase shift of the control signal for the corresponding chopper unit (110, 410) based on the reference signal for the corresponding chopper unit (110, 410) and the control signal for a different chopper unit (110, 410) and wherein the controlling units (211, 411) of the chopper units (110, 410) are connected such that a connection of the controlling units can turn from open to closed connection and /or from closed to open connection. a reference unit configured to generate a reference signal; and a phase controlling unit configured to control the phase shift of the control signal, and wherein the phase controlling unit of at least one of the chopper units (110, 410) is configured to control the phase shift of the control signal for the corresponding chopper unit (110, 410) based on the reference signal for the corresponding chopper unit (110, 410) and the control signal for a different chopper unit (110, 410) and wherein the controlling units (211, 411) of the chopper units (110, 410) are connected such that a connection of the controlling units can turn from open to closed connection and /or from closed to open connection.