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Less stage multiple increasing volume type high and medium voltage variable frequency speed regulating integrated device

A frequency conversion speed regulation and integrated device technology, which is used in electrical components, control systems, AC motor control, etc.

Inactive Publication Date: 2009-08-05
吕志斗
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  • Application Information

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Problems solved by technology

[0027] Aiming at the deficiencies of the existing high-voltage motor frequency conversion speed regulation scheme, the present invention provides a low-level multiple capacity-increasing type high-medium voltage frequency conversion speed regulation integrated device, aiming to solve the six shortcomings of the aforementioned multi-level multiple high-low-voltage high-voltage frequency conversion speed regulator. question

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  • Less stage multiple increasing volume type high and medium voltage variable frequency speed regulating integrated device
  • Less stage multiple increasing volume type high and medium voltage variable frequency speed regulating integrated device
  • Less stage multiple increasing volume type high and medium voltage variable frequency speed regulating integrated device

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Embodiment Construction

[0030] The technical solution will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] against image 3 The low-efficiency and high-cost multi-stage multiple high-low-voltage frequency conversion technology route of the known multi-stage multiple high-low-voltage frequency conversion speed control device, this technical solution adopts the high-efficiency and low-cost few-stage multiple high-voltage frequency conversion technology route, and changes the six weaknesses into Six advantages. Such as figure 1 As shown, the few-stage multi-capacity high-medium voltage frequency conversion and speed regulation integrated device is composed of a few-stage multi-phase low-voltage power supply and a medium-voltage power supply with few coils. High / medium / low voltage phase-shifting transformer HMLT, with boost The capacity-increasing few-stage multiple low-medium-voltage inverter LMF, the 2.3-6kV capacity-increasing med...

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Abstract

The frequency conversion (FC) integration system is integrated from parts: less coils high (H) / medium (M) / low (L) voltage (V) phase shifting transformer HMLT in use for providing less number of stage, multiple phases power supply in LV and line frequency (LF), and power supply in MV in LF; less number of stage multiple L / M V frequency converter LMF; 2.3-6kV capacity added type FC motor MM in MV modified from 6-10kV general HV motor HM by alternated structure; FC in MV / diverter switch in LF W1 and W2. Characters are: HMLT includes step up FC capacity added structure and power supply structure for MV and LF; under precondition of not changing flux density and current density, MM raises rated output power to 1-3 standard grades by using the disclosed structures; using 3-5 FC, LMF allows capacity added function. Raising the input V of FC can increase rated power to 0.5-2 standard grades. The input HV is 6-10kV, and LV is matched at 690-750V.

Description

technical field [0001] The invention relates to a high-voltage motor, in particular to a low-level and multiple-capacity-increasing type high- and medium-voltage frequency conversion and speed regulation integrated device suitable for energy saving and material saving of a high-voltage motor. Background technique [0002] According to the relevant regulations: the voltage of 10kV and above is called high voltage; the voltage below 10kV to 1kV is called medium voltage, and the voltage below 1kV is called low voltage. People habitually refer to 3kV, 6kV and 10kV voltages as high-voltage, motor manufacturers collectively refer to 3-10kV motors as high-voltage motors, and inverter manufacturers collectively refer to 3-10kV frequency conversion devices as high-voltage inverters. [0003] According to the design specifications, it is recommended to use high-voltage motors for motors above 200kW. This is because the transmission loss can be significantly reduced by adopting the hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P27/04
Inventor 吕志斗
Owner 吕志斗