Power module temperature estimation method

The invention discloses a power module temperature estimation method, and the method comprises the steps: 1, obtaining the loss of a to-be-analyzed power module, and determining the input heat of a first layer in a network model of the to-be-analyzed power module according to the loss; 2, determining a single-layer temperature difference of each layer in the network model according to the input heat of the first layer; and 3, determining the junction temperature of the to-be-analyzed power module according to the single-layer temperature difference of each layer and the environment temperature. According to the method, the junction temperature of the power module is estimated in an iterative computation mode, and the method is convenient to implement in a microprocessor. Meanwhile, parameters such as temperature and grid resistance are introduced when the loss of the power module is calculated, so that the loss calculation precision can be effectively improved, the junction temperatureestimation precision can