{"id":31882,"date":"2024-11-21T15:28:30","date_gmt":"2024-11-21T14:28:30","guid":{"rendered":"https:\/\/breuell-hilgenfeldt.de\/?page_id=31882"},"modified":"2025-06-12T11:16:42","modified_gmt":"2025-06-12T09:16:42","slug":"cooling-inverters","status":"publish","type":"page","link":"https:\/\/alex.breuell-hilgenfeldt.de\/en\/electronics-industries\/cooling-inverters\/","title":{"rendered":"Cooling inverters"},"content":{"rendered":"\t\t
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Wechselrichter und Umrichter<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\tA converter<\/strong> (also known as an inverter or rectifier) is an electronic device that converts electrical energy from one form to another, in particular alternating current (AC) to direct current (DC) or vice versa. Converters are used in various applications to adjust the properties of the current so that it can be used by certain devices or systems. \t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\tThe main functions and types of converters are:<\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\n\t\t\t\t\t DC-AC converter (DC-AC) <\/span><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/i><\/span>\n\t\t\t<\/i><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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\u2022 This type of converter converts direct current into alternating current.<\/p>

\u2022 Often referred to as an inverter, used in applications such as solar installations to convert the direct current generated by solar panels into the alternating current required by the grid.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t AC to DC converter (AC-DC) <\/span><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/i><\/span>\n\t\t\t<\/i><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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\u2022 Converts alternating current to direct current, often as a rectifier<\/strong><\/p>

\u2022 Used in chargers for electronic devices or to supply DC systems.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t Frequency inverter (Variable Frequency Drive, VFD) <\/span><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/i><\/span>\n\t\t\t<\/i><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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\u2022 A special type of converter that controls the frequency and voltage of the alternating current.<\/p>

\u2022 Often used in drive technology to operate electric motors more efficiently by adjusting their speed and power.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t Voltage converter (DC-DC converter) <\/span><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/i><\/span>\n\t\t\t<\/i><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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\u2022 This type of converter converts a DC voltage into another DC voltage, either at a higher or lower voltage level.<\/p>

\u2022 Used in many electronic devices to adjust the required operating voltage.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Applications of converters<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Inverters are widely used in various fields, such as:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\u2022 Solar and wind energy plants:<\/strong> In addition to the conversion of direct current from solar modules into usable alternating current for households or the grid, we also supply cooling systems for inverters and converters in wind turbines.<\/p>

\u2022 E-mobility:<\/strong> converters control and optimise the flow of electricity in electric vehicles.<\/p>

\u2022 Industrial applications:<\/strong> Frequency converters are used in industry to control the motors in machines and production plants.<\/p>

\u2022 Household appliances and electronics:<\/strong> Converters are found in many household appliances that need to adjust power to different voltage levels.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\n\t\t\t\t\t\tIn summary, the inverter is a central device in power electronics that makes it possible to efficiently convert electrical energy and to change the properties of the current for specific applications.\t\t\t\t\t<\/p>\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Cooling of inverters<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The cooling of inverters is important for several reasons, as it directly affects the efficiency, reliability and service life<\/strong> of the device. Inverters generate heat during the conversion process, particularly due to losses in the circuitry and internal resistors. Insufficient cooling can lead to overheating, which affects the operation and durability of the device. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\n\t\t\t\t\tHere are the main reasons why cooling inverters is important:<\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\n\t\t\t\t\t Avoidance of overheating and damage to components <\/span><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/i><\/span>\n\t\t\t<\/i><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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\u2022 Inverters contain electronic components such as power transistors, capacitors and diodes that are sensitive to high temperatures.<\/p>

\u2022 Overheating can cause permanent damage, impair the functionality of individual components and render the inverter unusable.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t Ensuring stable performance and efficiency <\/span><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/i><\/span>\n\t\t\t<\/i><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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\u2022 When an inverter overheats, it can no longer work efficiently because some components are forced to reduce their output.<\/p>

\u2022 Many inverters have protective mechanisms that reduce power or shut down the device to prevent damage when they overheat. However, this affects the efficiency and functionality of the system. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t Extension of the service life of the inverter <\/span><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/i><\/span>\n\t\t\t<\/i><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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\u2022 Most electronic components have a longer lifespan when operated within a certain temperature range.<\/p>

\u2022 Excessive operating temperatures accelerate the ageing of components, especially capacitors, which are frequently used in inverters. Good cooling helps to ensure that the inverter continues to work reliably for longer. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t Minimize energy losses <\/span><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/i><\/span>\n\t\t\t<\/i><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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\u2022 When an inverter overheats, the internal resistance of some components increases, which leads to higher energy losses.<\/p>

\u2022 The additional losses caused by poor cooling reduce the overall energy efficiency of the system and result in more energy being lost as waste heat.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t Avoidance of thermal runaway <\/span><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/i><\/span>\n\t\t\t<\/i><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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\u2022 At very high temperatures, power semiconductors can suffer from a phenomenon known as thermal runaway. During this process, the losses increase to such an extent that the component is destroyed in a very short time. <\/p>

\u2022 Effective cooling prevents the components from reaching this critical range.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t safety aspects <\/span><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/i><\/span>\n\t\t\t<\/i><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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\u2022 High temperatures inside an inverter enclosure increase the risk of fire, especially in large systems or under extreme environmental conditions.<\/p>

\u2022 Cooling helps to keep the housing and the surrounding components at a safe temperature.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Cooling techniques for inverters<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\tThere are various ways to cool inverters:\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\u2022 Air cooling:<\/strong> fans generate an air flow and conduct the heat away from the critical components.<\/p>

\u2022 Liquid cooling:<\/strong> For larger or more power-hungry systems, liquid cooling is used to efficiently remove heat.<\/p>

\u2022 Heat sinks and heat sinks:<\/strong> Many inverters are equipped with heat sinks that facilitate heat dissipation to the surrounding air.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\n\t\t\t\t\t\tIn summary, cooling an inverter is essential to maintaining performance and lifespan, preventing damage due to overheating, and ensuring safety. It is therefore a critical aspect of inverter design and operation, especially in high-power applications. \t\t\t\t\t<\/p>\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Air cooling of inverters<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\tEfficient cooling for inverters, based solely on ventilation technology, requires careful design to effectively dissipate heat and keep critical components such as power transistors, capacitors and diodes cool. While air cooling is a simple and cost-effective solution, it requires strategic design to function optimally with high efficiency and durability. \t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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\n\t\t\t\t\tHere is a possible structure and strategy for an efficient air-based cooling system for an inverter:<\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\u2022 The inverter casing should be designed so that the air can flow through it without resistance or turbulence.<\/p>

\u2022 A straight airflow path<\/strong> is ideal, as this ensures that the air flows evenly over the critical components and carries the heat with it.<\/p>

– An air inlet on the bottom<\/strong> or one side and an outlet on the opposite side or at the top<\/strong> are effective arrangements for effectively conducting the heat generated out of the housing.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t Use of high-performance fans <\/span><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/i><\/span>\n\t\t\t<\/i><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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\u2022 Powerful fans ensure sufficient air flow, especially when the inverter is operating at high power and producing more heat.<\/p>

\u2022 The fans should be arranged so that cooler air is drawn into the case from the outside and warm air is efficiently expelled to the outside.<\/p>

\u2022 Intelligent control<\/strong> of fan speed (e.g. depending on temperature) can help to operate fans efficiently while minimising energy consumption and noise.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t Targeted positioning of the heat sinks <\/span><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/i><\/span>\n\t\t\t<\/i><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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\u2022 Heat sinks made of thermally conductive materials (e.g. aluminium or copper) are attached to the hottest components, such as power transistors and diodes, to dissipate heat quickly.<\/p>

\u2022 The heat sink should be designed to have a large surface area and many fins to maximise heat exchange with the air.<\/p>

\u2022 The heat sinks should be placed in the air flow of the fan so that the air flowing through them can quickly dissipate the heat absorbed by the heat sinks.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t Ducting for air control <\/span><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/i><\/span>\n\t\t\t<\/i><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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\u2022 With air ducts<\/strong> inside the housing, the airflow can be directed to the places that need the most cooling.<\/p>

\u2022 The channels direct the air over the heat-generating components and prevent the air from \u2018straying\u2019 or flowing too quickly past heat-sensitive components.<\/p>

\u2022 This targeted control helps to achieve an effective cooling effect even at lower fan speeds.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t Thermal decoupling and insulation <\/span><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/i><\/span>\n\t\t\t<\/i><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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\u2022 Heat-sensitive components such as capacitors or ICs should be mounted thermally decoupled from heat-intensive components such as power transistors.<\/p>

\u2022 An insulating arrangement<\/strong> of the components prevents the heat from highly heated components from spreading to more temperature-sensitive components.<\/p>

\u2022 This keeps the thermal load on the more sensitive parts low, which extends the overall service life of the inverter.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t Use of thermal sensors and temperature monitoring <\/span><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/i><\/span>\n\t\t\t<\/i><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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\u2022 Multiple temperature sensors<\/strong> in strategic positions enable continuous monitoring of heat distribution in the inverter.<\/p>

\u2022 These sensors can work in conjunction with an automatic fan speed controller<\/strong> to dynamically adjust fan performance based on temperature load.<\/p>

\u2022 A warning system or automatic shutdown at high temperatures can also be integrated to protect the inverter from overheating.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t Filtering the supply air <\/span><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/i><\/span>\n\t\t\t<\/i><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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\u2022 To prevent dust and dirt from collecting inside the inverter<\/strong>, air filters should be attached to the air inlets.<\/p>

\u2022 Dust deposits on the heat sinks and electronic components would impede heat dissipation and reduce cooling performance.<\/p>

\u2022 The filters should be cleaned or replaced regularly to ensure long-term air cooling efficiency.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\n\t\t\t\t\tExample of the air cooling process: <\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\u2022 Cool air<\/strong> is drawn in from outside through one or more fans and directed to the components via a duct.<\/p>

\u2022 The air flows along the heat sinks<\/strong>, which are attached to heat-generating components, and absorbs the heat from the components.<\/p>

\u2022 The heated air<\/strong> is removed to the outside by a second fan or a natural air outlet.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\n\t\t\t\t\t\tCareful design and coordination of these elements allows an efficient air-cooled inverter to be realised that works reliably and at a stable temperature.\t\t\t\t\t<\/p>\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\n\t\t\t\t\tDo you have any questions or would you like some advice?<\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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We will be happy to answer any questions you may have and look forward to hearing from you.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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You can reach us Monday to Thursday<\/strong> from 8 a.m. to 5 p.m.<\/strong> and Friday<\/strong> from 8 a.m. to 2 p.m.<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Wechselrichter und Umrichter A converter (also known as an inverter or rectifier) is an electronic device that converts electrical energy<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":23851,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-31882","page","type-page","status-publish","hentry"],"yoast_head":"\nCooling inverters | Breuell & Hilgenfeldt GmbH<\/title>\n<meta name=\"description\" content=\"Efficient methods for cooling power electronics inverters. Find out more now!\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cooling inverters | Breuell & Hilgenfeldt GmbH\" \/>\n<meta property=\"og:description\" content=\"Efficient methods for cooling power electronics inverters. 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