1, explosion-proof problem
Because the environment used by this inverter has more explosive gas or dust, this requires the inverter to be sealed and explosion proof, so its shell can not use the ordinary shell, it must use the standard explosion-proof cavity, and install all the components of the inverter. In the explosion-proof cavity. Open an observation window on the explosion-proof chamber door, install the display part on it, and install start, stop and speed control on the explosion-proof chamber door.
2, heat problem
Because all the components of the inverter are installed in the explosion-proof cavity, the air cannot flow, and the heat dissipation problem becomes the key problem that the inverter must solve. Here we use a new cooling technology - heat pipe cooling technology.
(1) Principle of heat pipe technology
The heat pipe is a heat transfer element with extremely high thermal conductivity. It transfers heat through the evaporation and condensation of the working medium in a totally enclosed vacuum tube. It has extremely high thermal conductivity, good isothermality, and heat transfer on both sides. The area can be arbitrarily changed, long-distance heat transfer, temperature control, and other advantages. The heat exchanger composed of heat pipes has the advantages of high heat transfer efficiency, compact structure, and low fluid loss resistance.
(2) Inverter structure layout
We design the main circuit as a large unit and install it in the rectangular explosion-proof cavity inside the back wall. The back wall is connected to the heating element such as the IGBT module and the rectifier module through an overheating radiator. The outer wall of the explosion-proof housing is welded with a slotted heat sink. The heat sink is connected to the trough radiator. The heat generated inside the inverter is dissipated through the heat sink slot heat sink of the radiator in the back wall of the explosion-proof chamber.
3, the main circuit structure and the general inverter
(1) There is no loop to avoid the unsafe factors caused by the electric spark generated when the relay operates, which increases the safety and reliability of the inverter.
(2) Rectifier capacity selection is doubled than that of general-purpose inverters in order to withstand the impact of capacitive charging currents at the instant of inverter startup.
(3) The filter capacitor uses multiple non-inductive capacitors. The parallel electrolytic capacitor has a large volume. It is easy to explode in high temperature environment and is unsafe. The non-inductive capacitor is small in size, high temperature and high pressure, and it is very safe to use in this environment.
Because the environment used by this inverter has more explosive gas or dust, this requires the inverter to be sealed and explosion proof, so its shell can not use the ordinary shell, it must use the standard explosion-proof cavity, and install all the components of the inverter. In the explosion-proof cavity. Open an observation window on the explosion-proof chamber door, install the display part on it, and install start, stop and speed control on the explosion-proof chamber door.
2, heat problem
Because all the components of the inverter are installed in the explosion-proof cavity, the air cannot flow, and the heat dissipation problem becomes the key problem that the inverter must solve. Here we use a new cooling technology - heat pipe cooling technology.
(1) Principle of heat pipe technology
The heat pipe is a heat transfer element with extremely high thermal conductivity. It transfers heat through the evaporation and condensation of the working medium in a totally enclosed vacuum tube. It has extremely high thermal conductivity, good isothermality, and heat transfer on both sides. The area can be arbitrarily changed, long-distance heat transfer, temperature control, and other advantages. The heat exchanger composed of heat pipes has the advantages of high heat transfer efficiency, compact structure, and low fluid loss resistance.
(2) Inverter structure layout
We design the main circuit as a large unit and install it in the rectangular explosion-proof cavity inside the back wall. The back wall is connected to the heating element such as the IGBT module and the rectifier module through an overheating radiator. The outer wall of the explosion-proof housing is welded with a slotted heat sink. The heat sink is connected to the trough radiator. The heat generated inside the inverter is dissipated through the heat sink slot heat sink of the radiator in the back wall of the explosion-proof chamber.
3, the main circuit structure and the general inverter
(1) There is no loop to avoid the unsafe factors caused by the electric spark generated when the relay operates, which increases the safety and reliability of the inverter.
(2) Rectifier capacity selection is doubled than that of general-purpose inverters in order to withstand the impact of capacitive charging currents at the instant of inverter startup.
(3) The filter capacitor uses multiple non-inductive capacitors. The parallel electrolytic capacitor has a large volume. It is easy to explode in high temperature environment and is unsafe. The non-inductive capacitor is small in size, high temperature and high pressure, and it is very safe to use in this environment.
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