◎ 產(chǎn)品特征 Product features
◆ 固態(tài)繼電器或模塊要配什么型號的散熱器呢？其實兩者之間并沒有一個完全一致的對應(yīng)關(guān)系，因為固態(tài)繼電器或模塊的發(fā)熱量主要跟所驅(qū)動的負(fù)載的實際電流有關(guān)，而與本身的電流等級大小關(guān)系不大。
◆ 發(fā)熱量的計算公式：
1. 發(fā)熱量 = 實際負(fù)載電流 ( 安倍 ) * 1.5 瓦 / 安倍以上公式適合于單相固態(tài)繼電器 , 單相交流調(diào)壓模塊 , R系列固態(tài)調(diào)壓器 . 而對于三相固態(tài)繼電器 , 三相交流調(diào)壓模塊 , 其實際負(fù)載電流應(yīng)為實際負(fù)載電流之和。
2. 發(fā)熱量 = 實際負(fù)載電流 ( 安倍 )*3.0 瓦 / 安培以上公式適合于單相全控整流模塊
◆ 散熱器的作用就是把固態(tài)繼電器或模塊產(chǎn)生的熱量散發(fā)出來 , 但實際上 ( 考慮到價格因素時 ) 選擇散熱器的大小很難用一句話就能確定 , 因為散熱器效果不但跟散熱器的大小有關(guān) , 還跟環(huán)境溫度 ( 季節(jié) ), 通風(fēng)條件 ( 自然冷卻或強制冷卻及風(fēng)量大小 ), 以及安裝密度等因素均有關(guān) . 散熱效果的參考標(biāo)準(zhǔn) : 使固態(tài)繼電器或模塊的底板 ( 與散熱器接觸面 ) 溫度不超過 80℃ . 因此實際應(yīng)用中可在散熱器安裝面靠近固態(tài)繼電器或模塊的邊緣塊(20mm 以內(nèi) ) 安裝一只 75℃的溫度開關(guān) ( 帶一對常閉觸點 ), 把固態(tài)繼電器或模塊的控制信號串入這對常閉觸點 , 這樣當(dāng)檢測點溫度超過 75℃時 , 常閉觸點跳開 , 切斷控制信號 , 強迫關(guān)閉固態(tài)繼電器或模塊的輸出 , 使其得到保護(hù) . 一般在每相實際電流超過 50A, 安裝密度大 ,環(huán)境溫度高的地方 , 最好采用溫度開關(guān)保護(hù)。
◆ 選用散熱器除考慮上述因素外 , 還要考慮固態(tài)繼電器或模塊本身體積與散熱器能否相配 , 以及散熱器在機(jī)構(gòu)中的安裝空間 . 但最終要保證在惡劣情況下 , 固態(tài)繼電器或模塊的底板溫度不超過 80℃。
◆本廠生產(chǎn)的散熱器產(chǎn)品主要有以下規(guī)格 :
MG-I, MG-W, MG-T, MG-L, MG-H, MG-F,MG-Y 七大系列 , 適合于各種單相固態(tài)繼電器 , 單相交流調(diào)壓模塊 , R 系列固態(tài)調(diào)壓器 , 工業(yè)級固態(tài)繼電器及各種三相交流固態(tài)繼電器。
◆ How to choose the right heat sink for solid state relays or modules?In fact, the model of the heat sink does not one-one correspond to the model of the solid state relay or module. The heat generated by the solid state relay or module is mainly related to the actual current of the load, instead of its own rated current specification.
◆ Heat calculation formula:
1. Heat = Actual load current (Amps) * 1.5 W/Amps The above formula is suitable for single phase solid state relays, single phase AC voltage regulator modules, and R series solid state voltage regulators. For three phase solid state relays and three phase AC voltage regulator modules, the actual load current should be the sum of the actual load currents.2. Heat = actual load current (Abe) * 3.0 watts/Abe formula is suitable for single-phase full control rectifiermodule.
2. Heat = Actual load current (Amps) * 3.0 W/Amps The above formula is suitable for single phase fully-controlled bridge rectifier module.
◆ The role of the heat sink is to dissipate the heat generated by the solid state relay or module, but in reality (considering cost factors), the choice of heat sink size is difficult to determine simply.
Because the effect of the radiator is not only related to the size of the radiator, but also to the ambient temperature (season), ventilation conditions (natural / forced cooling, and ventilation volume), and installation density. Heat dissipation reference standard: The temperature of the bottom plate (the side in contact with the heat sink) of the solid state relay or module does not exceed 80 ° C. In practical applications, we recommend installing a 75 ° C temperature switch (with a pair of normally closed contacts) on the heatsink mounting surface near the edge of the solid state relay or module (within 20mm), and connecting the control signals of the solid state relay or module in series with the normally closed contacts. Thus, when the temperature of the detection point exceeds 75 ° C, the normally closed contact trips and cuts off the control signal, and the output of the solid state relay or module is forcibly turned off to be protected.
Generally, if the solid state relay or module is installed to the place with each phase of the actual current exceeding 50A, high installation density, and high ambient temperature, it is better to apply a temperature switch protection.
◆ In addition to considering the above factors, it is also necessary to consider whether the volume of the solid state relay or the module itself and the installation space of the heat sink in the equipment matches the parameters of the heat sink.
◆ The following is the series of the heat sink mainly produced by our company:
MG-I, MG-W, MG-T, MG-L, MG-H, MG-F, MG-Y. These seven series are suitable for a variety of single phase solid state relays, single phase AC voltage regulator modules, R series solid state voltage regulators, industrial solid state relays and various three phase AC solid state relays.
◎ MG- Ⅰ型散熱器系列
MG- Ⅰ Series heat sink
◎ MG-L 型散熱器系列
MG-L Series heat sink
◎ MG-H 型散熱器系列
MG-H Series heat sink
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◎ MG-F 型散熱器系列
MG-F Series heat sink
◎ MG-Y 型散熱器系列
MG-Y Series heat sink
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