電氣開(kāi)關(guān)電源外文文獻(xiàn)-資料下載頁(yè)
2025-05-16 06:51本頁(yè)面
【正文】 event overheating.Conclusion Discussed above in the switching regulator of a variety of conservation, and introduces a number of specific ways to achieve. Of a given switching power supply is concerned, but also protection from the whole to consider the following points: 1) the switching regulator used in the switching transistor in the DC security restrictions on the work of regional work. The transistor switches selected by the manual available transistors get DC safe working area. According to the maximum collector current to determine the input value of overcurrent protection. However, the instantaneous maximum value should be converted to the average current. At rated output current and output voltage conditions, the switch of the dynamic load line does not exceed a safe working area DC maximum input voltage, input overvoltage protection is the voltage value. 2) the switching regulator output limit given by the technical indicators within. Work within the required temperature range, the switching regulator39。s output voltage, the lower limit of the output is off, due to the voltage value of voltage protection. Overcurrent protection can be based on the maximum output current to determine. False alarm in order not to protect the value of a certain margin to remain appropriate. 3) from the above two methods to determine the protection after the power supply device in accordance with the needs of measures to determine the alarm. Measures the general alarm sound and light alarm two police. Voice of the police applied to more plex machines, power supply parts and do not stand out in a place, it can give staff an effective warning of failure。 optical Police instructions can be eyecatching and fault alarm and pointed out that the fault location and type. Protection measures should be protected as to determine the location. In the highpower, multichannel power supply, always paying, DC circuit breakers, relays, etc. highsensitivity autoprotection measures, to cut off the input power supply to stop working the system from damage. Through the logic control circuit to make the appropriate program cutoff switch transistor is sensitive it is convenient and economic. This eliminated large, long response time, the price of your highpower relay or circuit breaker. 4) the power of putting in the protection circuit will be affected after the reliability of the system, for which want to protect the reliability of the circuit itself is higher in order to improve the reliability of the entire power system, thereby increasing its own power supply MTBF. This requires the protection of strict logic, the circuit is simple, at least ponents, In addition to the protection circuit should also be considered a failure of maintenance of their difficulty and their power to protect the damage. Therefore, we must be prehensive and systematic consideration of a variety of switching power supply protection measures to ensure the normal operation of switching power supplies and highefficiency and high reliability.
公司管理相關(guān)推薦
鄂ICP備17016276號(hào)-1