Is it a fault that the power capacitor heats up when it is running?The heat generated by the capacitor may be a sign of a malfunction or a phenomenon during normal operation.
In today's article, Xiaoku will introduce the relevant content from three aspects: the causes, effects and countermeasures of power capacitor heating, come and understand!
1.Internal Wear and Tear:Power capacitors during operation, will be because:An electric current passesConductors, insulating materials, and liquid dielectrics lead to certainInternal Wear and Tear:, which generates heat.
2.Overcurrent:Occurs when the current in a capacitor exceeds its rated valueOvercurrent phenomenon, excessive current can cause in the capacitorDielectric damage, resulting in fever.
3.Capacitor aging:Long-term use of power capacitors will be due to:Material aging, internal media degradationand other reasons that cause the capacitor to heat up.
4.External Environment:CapacitorsThe temperature of the surrounding environment is too high, which will affect the capacitorHeat dissipation effect, resulting in serious capacitor heating.
1.Efficiency decreases:When a power capacitor is overheated, the performance of its internal dielectric is affected, making the capacitor electricCapacity decreases, causedReduced circuit efficiency
2.Short Circuit Risk:Capacitor heating may be conductedCauses the internal electrolyte liquid to evaporate, forming a gas and increasing capacitorsInternal pressure, increaseShort circuitRisk.
3.Life Shortening:Power capacitors overheating willAccelerateThe aging process of its internal material results in capacitorsLife Shortening:
1.Select the appropriate capacitor type and parameters:According toActual needSelect the appropriate power capacitor model and parameters to ensure that the operating current and operating voltage are within its rated range.
2.Over-current protection and over-voltage protection:Select YesOver-current and over-voltage protection devicepower capacitor products, or incircuitThe overcurrent protection device can effectively prevent the capacitor from heating up due to excessive current.
3.Regular inspection and maintenance:Regularly inspect the capacitorsCapacitance value, internal resistance, and operating temperatureand other parameters, such as finding an abnormalityTimelyReplacement.
4.Controlling the ambient temperature:Hold the capacitorAmbient temperatureThe degree is suitable, avoid working in a high temperature environment, and can be passedIncrease ventilation or improve heat dissipation conditionsto control the temperature.