Patent ID: 8628310

Claim:
A fan system, comprising: two electric motors; two circuit breakers provided on a board, wherein an operating voltage of the two electric motors is supplied via the circuit breakers; a control module for controlling the two circuit breakers; and at least one temperature sensor provided on the board; wherein the control module evaluates a signal from the temperature sensor and a requested fan power to set pulse duty factors of pulsed control voltages at each of the two circuit breakers in such a way that the requested fan power is reached without a temperature of the board exceeding a first temperature limit, and wherein, responsive to the board temperature exceeding a second temperature limit, at least one pulse duty factor of the pulsed control voltage at a first of the two circuit breakers is set to a constant value of 100% and at least one pulse duty factor of the pulsed control voltage at a second of the two circuit breakers is set such that a total output fan power of the fan system corresponds to the requested fan power.