3results about How to "Avoid temperature changes" patented technology

A power control device controls temperature of an apparatus having a cooling mechanism and a heat generating component. The power control device includes a nonvolatile storage unit that stores information indicating unique characteristics including thermal resistance and thermal capacity of the apparatus for each current of the heat generating component, a current measurement unit configured to measure a current flowing through the heat generating component, a temperature measurement unit configured to measure a current temperature of the heat generating component, and a control unit configured to perform cooling control on the apparatus. The control unit estimates a temperature rise value after a certain delay time based on the current, the temperature, and the information on the unique characteristics, and performs the cooling control on the apparatus based on the estimated temperature after the delay time.

This utility model discloses a high-temperature sterilization system for an enzyme production line, including a high-temperature instantaneous sterilizer. A stepper motor is fixedly installed on one side of the bottom end of the high-temperature instantaneous sterilizer. The output shaft of the stepper motor is connected to a lifting threaded rod via a coupling. The upper end face of the lifting threaded rod is connected to a top plate via a roller bearing. A guide rod is fixedly installed on both sides of the lower end face of the top plate. A lifting sleeve is fitted on the upper side of the outer surface of the two guide rods. This utility model allows for the cyclic use of two heating inner tanks. When one heating inner tank has just experienced a relatively drastic temperature change inside the high-temperature instantaneous sterilizer, the other heating inner tank can be automatically installed inside the high-temperature instantaneous sterilizer for use. This technical solution can prevent a single heating inner tank from experiencing multiple temperature changes in a short period of time, thereby improving the service life of the heating inner tank.

This invention discloses a method and system for estimating the temperature of a permanent magnet synchronous motor (PMSM) based on offline data. The method includes: constructing a temperature-considered voltage model of the PMSM; acquiring multiple sets of offline data and obtaining the sum and difference of the products of the dq-axis voltage and current under the offline data through calculation and relationship fitting; and combining the difference between the sum and difference of the products of the dq-axis voltage and current under the offline and online data with the temperature-considered PMSM voltage model to calculate the estimated winding temperature and flux linkage temperature. The system includes: a model construction module, an offline data acquisition module, an offline data calculation module, a relationship fitting module, an online data acquisition module, and a temperature estimation module. Using this invention simplifies implementation and storage, ensures that the temperature remains constant during data acquisition, and improves the accuracy of temperature estimation. This invention, as a temperature estimation method and system for PMSMs based on offline data, can be widely applied in the field of PMSM technology.