Energy-saving soft-start device for high-voltage asynchronous motor

An asynchronous motor, soft start technology, applied in the direction of motor generator/starter, starter of a single multi-phase induction motor, etc., can solve the problems of power factor cannot be automatically improved, consumption, large footprint, etc.

Inactive Publication Date: 2011-09-14
SHANGHAI MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the existing problems of soft starters in the prior art, such as occupying a large area, consuming a large amount of energy, and the power factor cannot be automatically im

Method used

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  • Energy-saving soft-start device for high-voltage asynchronous motor
  • Energy-saving soft-start device for high-voltage asynchronous motor
  • Energy-saving soft-start device for high-voltage asynchronous motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] This embodiment further illustrates the device of the present invention by introducing a specific circuit.

[0096] The hardware circuit in this embodiment uses Figure 1 to Figure 9 as well as Figure 17 In addition, the circuit of this embodiment also has a display unit, a keyboard input circuit, and a remote control circuit, which are omitted in the figure, and the DC power supply circuit is not drawn in detail. Some of the content omitted and not drawn in detail above are common and well-known technical means in this technical field, and related books are flooded in libraries and bookstores. Repeat the description again in order to have enough space to describe the technology of the present invention in detail.

[0097] Combine below Figure 1 to Figure 9 as well as Figure 17 The circuit in this embodiment will be described in detail.

[0098] about figure 1 , figure 2 and image 3 instruction of.

[0099] figure 1 It is the electrical principle block di...

Embodiment 2

[0163] combine Figure 18 Be explained. right first Figure 18 The labels in are explained: A is the first phase sequence in the three-phase alternating current, that is, the phase sequence of the A phase, and is also expressed as the terminal of the A phase; B is the second phase sequence in the three-phase alternating current, that is, the phase sequence of the B phase , which is also expressed as the B-phase terminal; C is the third phase sequence in the three-phase AC, that is, the C-phase phase sequence, and is also expressed as the C-phase terminal; M is the internal Y-connected motor; U is the soft The output end of the starter, that is, the input end of the motor, is located on the A-phase line; V is the output end of the soft starter, that is, the input end of the motor, and is located on the B-phase line; W is the output end of the soft starter, that is, the motor The input terminal is located on the C-phase line; N is the neutral terminal of the three-phase AC pow...

Embodiment 3

[0169] combine Figure 19 Be explained. right first Figure 19 The labels in are explained: A is the first phase sequence in the three-phase alternating current, that is, the phase sequence of the A phase, and is also expressed as the terminal of the A phase; B is the second phase sequence in the three-phase alternating current, that is, the phase sequence of the B phase , which is also expressed as the B-phase terminal; C is the third phase sequence in the three-phase AC, that is, the C-phase phase sequence, and is also expressed as the C-phase terminal; M is the internal Y-connected motor; U is the soft The output end of the starter, that is, the input end of the motor, is located on the A-phase line; V is the output end of the soft starter, that is, the input end of the motor, and is located on the B-phase line; W is the output end of the soft starter, that is, the motor The input terminal of is located on the C-phase line; N is the neutral wire terminal of the three-phas...

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Abstract

The invention relates to the technical field of applications of high-voltage asynchronous motors and discloses an energy-saving soft-start device for a high-voltage asynchronous motor. The device is used for solving the problem that a soft starter occupies a larger space in the prior art and other problems. The technical scheme is as follows: the energy-saving soft-start device is characterized by comprising a signal detection processing circuit, a synchronous signal circuit, a control circuit, a trigger signal power amplifying circuit, a power execution circuit and a power circuit for providing more than one path of DC (direct-current) power supply, wherein the power execution circuit comprises three large groups of components which are in series connection between a terminal of a three-phase high-voltage AC (alternating-current) power supply and a terminal of the high-voltage asynchronous motor; each large group of components comprises two small groups of high-power thyristors which are connected in parallel in the opposite directions; and more than three high-power thyristors are connected in series in the same direction in each small group and two ends of each high-power thyristor are connected with circuits with voltage-sharing, protection and absorption effects in parallel. The energy-saving soft-start device has the beneficial effects of realizing the soft start and energy-saving running under a low load factor.

Description

technical field [0001] The invention relates to the technical field of application of high-voltage asynchronous motors, in particular to an energy-saving soft starter for high-voltage asynchronous motors. The present invention can be applied to occasions such as high-pressure pumping units, high-pressure water pumps, high-pressure fans, etc., for example: high-power motors with a rated voltage of 3KV-10KV and a capacity of more than 100KW. Background technique [0002] AC asynchronous motors are widely used in various fields of the national economy such as industrial and mining enterprises, transportation, and national defense industry. High-voltage (3KV ~ 10KV) asynchronous motors are widely used in industries such as metallurgy, petroleum, chemical industry, coal, water plants, power plants, machining and other industries. According to the 1995 "Research Report on Industrialization Approaches and Countermeasures of Motor Speed ​​Regulation Technology", the number of fans ...

Claims

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Application Information

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IPC IPC(8): H02P1/28
Inventor 甘世红俞渊褚建新顾伟
Owner SHANGHAI MARITIME UNIVERSITY
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