MVI56-PDPS通訊模塊,PROSOFT產(chǎn)品外觀(guān)
在整流過(guò)程中輸入的諧波和功率因數均可以控制。由于單元采用PWM整流，可以再生制動(dòng)，四象限運行?？梢蕴峁╊~定容量80%的回饋能力，減速時(shí)可以將電機和負載的動(dòng)能變成電能反饋回電網(wǎng)，無(wú)需制動(dòng)電阻，就可以實(shí)現快速的減速和制動(dòng)。MVe2變頻器輸入采用單相PWM整流、諧波極小，這樣使得輸入變壓器二次側繞組不需要移相，結構變得簡(jiǎn)單；同時(shí)采用三電平IGBT串聯(lián)輸出，提高了單元耐壓等級、減少了單元數量使得輸入變壓器二次側繞組數量大大減少、工藝更簡(jiǎn)單可靠。
MVI56-PDPS通訊模塊4）MVe2變頻單元的硬件構成
整流：IGBT、逆變：IGBT為三菱原裝產(chǎn)品，中間直流回路電容：可自愈式金屬薄膜電容，使用壽命長(cháng)。
（5）變頻裝置保護配置：一次風(fēng)機原10kV電源開(kāi)關(guān)保護配置不變，作為旁路運行方式的保護。在變頻器上口開(kāi)關(guān)柜配置CSC241C、保護裝置中設置第二套定值作為變頻方式運行的變壓器主保護。變頻裝置本體保護和電機的各種保護由變頻裝置自身保護功能實(shí)現。
2.6 緊急停機：變頻裝置自身帶有緊急停機按鈕。另外在電動(dòng)機事故按鈕增加一對常開(kāi)接點(diǎn)，接至變頻裝置用來(lái)在電動(dòng)機故障時(shí)就地同時(shí)切除變頻裝置運行。
4 控制及邏輯說(shuō)明
（1）變頻運行方式
正常運行期間兩臺一次風(fēng)機變頻自動(dòng)運行，動(dòng)葉手動(dòng)放置在60～80%開(kāi)度，通過(guò)變頻器自動(dòng)調節風(fēng)機轉速，調整一次風(fēng)壓；
（2）工頻運行方式
兩臺風(fēng)機均工頻運行期間，保持原邏輯不變，通過(guò)調整風(fēng)機動(dòng)葉自動(dòng)調節一次風(fēng)壓；
（3）一臺變頻一臺工頻運行
1）變頻器投入自動(dòng)調節一次風(fēng)壓，工頻運行風(fēng)機手動(dòng)調節動(dòng)葉開(kāi)度，調整兩臺風(fēng)機出力平衡；
2）工頻運行風(fēng)機動(dòng)葉投入自動(dòng)調節一次風(fēng)壓，變頻運行風(fēng)機手動(dòng)調節轉速，調整兩臺風(fēng)機出力平衡；
interference ability, and the protection level of electromagnetic interference reaches level 4.
5. Working voltage Ethernet switches in the industry have a wide working voltage range, covering the range of DC 12v-48v, while ordinary switches have high voltage requirements and mostly supply power with fixed voltage.
6. Power supply design ordinary switches are basically single power supply, while the power supply of industrial switches are dual power supplies, which are backup to each other. In addition, the power loss alarm function is added.
7. installation mode the industrial Ethernet switch can be installed by DIN rail, rack, etc. the common switch is generally installed by rack and desktop.
8. Heat dissipation mode industrial Ethernet switch adopts fan less shell for heat dissipation, while ordinary switch adopts fan for heat dissipation.
Industrial switches are widely used. In terms of industrial applications, they are mainly used in coal mine safety. 1. Confirm whether the industrial switch is intelligently managed, and the industrial switch without
