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Large-capacity anti-explosion frequency converter applicable to multiple output voltage levels

An explosion-proof inverter, voltage level technology, applied in the direction of output power conversion device, AC power input conversion to AC power output, electrical components, etc., can solve the problems of explosion-proof inverter complex structure, maintenance work, etc., to achieve easy Maintenance, circuit structure is simple and reliable, and the effect of large output capacity

Inactive Publication Date: 2015-05-20
襄阳中车电机技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure of the existing explosion-proof frequency converter is relatively complicated, which brings certain changes to the maintenance work.

Method used

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  • Large-capacity anti-explosion frequency converter applicable to multiple output voltage levels
  • Large-capacity anti-explosion frequency converter applicable to multiple output voltage levels
  • Large-capacity anti-explosion frequency converter applicable to multiple output voltage levels

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Embodiment Construction

[0027] Such as figure 2 As shown, the present invention includes an inverter unit 1, an inverter unit 2, an inverter unit 3, a four-quadrant rectifier unit 5, an output reactor 7, a star conversion contactor 8, a delta conversion contactor 9, and an input reactor 10; The input end of the four-quadrant rectification unit 5 is connected with an input reactor 10, the input ends of the three inverter units 1, 2, and 3 are connected to the output end of the four-quadrant rectification unit 5, and the three inverter units 1, 2, and 3 The output ends of the three inverter units 1, 2, and 3 are respectively connected to the output reactor 7; the output ends of the three inverter units 1, 2, and 3 are connected to a star-shaped conversion contactor 8 that connects the three inverter units 1, 2, and 3 in a star shape, and the Three inverter units 1, 2, and 3 are delta-connected delta conversion contactors 9, the three inverter units 1, 2, and 3 are all single-phase inverter units, and ...

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Abstract

The invention discloses a large-capacity anti-explosion frequency converter applicable to multiple output voltage levels, and relates to a large-capacity anti-explosion frequency converter applicable to two voltage levels. The problem of poor universality of a known frequency converter due to the facts that the known frequency converter is only applicable to one output voltage level and a frequency converter applicable to two voltage levels needs to be equipped for the occasion with usage of two voltage levels is mainly to be solved. An input end of a four-quadrant rectifying unit is connected with an input electric reactor, an output end of the four-quadrant rectifying unit is connected with input ends of three inverting units, output ends of the three inverting units are connected with an output electric reactor, connected to a star-shaped changeover contactor and a triangular changeover contactor, and the three inverting units are connected to form a star shape via the star-shaped changeover contactor and are connected to form a triangular shape via the triangular changeover contactor. The large-capacity anti-explosion frequency converter is applicable to loads different in voltage level, unchanged in capacity, integrally modular, easy to maintain, high in heat radiating efficiency due to water cooling and high in output capacity.

Description

technical field [0001] The invention relates to a large-capacity explosion-proof frequency converter, in particular to a large-capacity explosion-proof frequency converter with two voltage levels suitable for the underground environment of coal mines. Background technique [0002] It is known that coal petrochemical and other industries have an explosive environment for their production. If there is explosive gas, steam or dust, the frequency conversion speed control device working in this environment is required to have explosion-proof performance; the current mainstream voltage level of coal mines is 660 V or 1140 V , and the inverter used in the underground does not have the ability to take into account the two voltage levels, the inverter can only output one voltage level, that is, 660V or 1140V; the loads in the coal mine are diverse, such as belt conveyors, water pumps, emulsion pumps etc. It requires heavy-load start-up and frequent speed regulation. Therefore, freque...

Claims

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Application Information

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IPC IPC(8): H02M5/48
CPCH02M5/48
Inventor 敬华兵梁金成彭力亢黎明杨永龙周洪生
Owner 襄阳中车电机技术有限公司
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