Semiconductor cooling for optimized service life

The invention relates to a method for cooling at least one semiconductor (2). In order to improve cooling for the service life of the semiconductor, the time curve of the load of the semiconductor is determined during a predeterminable time period, and the cooling device (3) for cooling the at least one semiconductor (2) is controlled in an open-loop or closed-loop manner as a function of a load cycle of the semiconductor (2) caused by the determined time curve of the load. The invention further relates to a power unit (1) comprising at least one semiconductor (2), a cooling device (3) for cooling the at least one semiconductor (2), the cooling power of the cooling device (3) being controllable, and a control unit (4) designed to open-loop or closed-loop control of the cooling power of the cooling device (3) by means of such a method. The invention also relates to a power converter (10) having at least one such power unit (1). 本发明涉及一种用于冷却至少一个半导体(2)的方法。为了针对半导体的服务寿命改进冷却，在能预定的时间段期间确定半导体的负载的时间曲线，并且根据半导体(2)的由负载的确定