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Measuring system for circulating loss between strands of generator stator bar and its measuring method

A generator stator and stator bar technology, which is applied in the direction of motor generator testing, etc., can solve the problem that the stator bar circulation loss cannot be directly measured, and achieve the effects of shortening the test cycle, reducing costs, and improving accuracy

Active Publication Date: 2018-01-09
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the stator bar circulation loss cannot be directly measured in the existing motor loss testing technology. The present invention provides a test system for the circulation loss between the strands of the stator bar of a generator and a measurement method realized by using the system

Method used

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  • Measuring system for circulating loss between strands of generator stator bar and its measuring method
  • Measuring system for circulating loss between strands of generator stator bar and its measuring method
  • Measuring system for circulating loss between strands of generator stator bar and its measuring method

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specific Embodiment approach 1

[0045] Specific implementation mode one: see Figure 1 to Figure 3 Describe this embodiment, the generator stator bar inter-strand circulation loss test system described in this embodiment, the test system is used to test the circulation loss of three sets of stator bars 5, each group includes two stator bars 5, The test system includes a power supply platform 1, a protection device 2, a test platform 3 and a circulating current detection platform 4,

[0046] The power supply platform 1 includes an AC adjustable power supply 1-1 and a transformer 1-2, the AC adjustable power supply 1-1 is used to supply power to the transformer 1-2, and the protection device 2 is pasted on any one of the stator bars 5 On the end, the protection device 2 is used to control the on-off of the AC adjustable power supply 1-1,

[0047] The test platform 3 includes a wire bar connection terminal 3-2 and a multi-slot stator core 3-1. The multi-slot stator core 3-1 is a block with multiple grooves on ...

specific Embodiment approach 2

[0058] Embodiment 2: The difference between this embodiment and the test system for the circulation loss between strands of generator stator bars described in Embodiment 1 is that the protection device 2 is a thermal switch device.

specific Embodiment approach 3

[0059] Specific implementation mode three: see figure 1 , 2 and 4 illustrate this embodiment, the generator stator bar inter-strand circulation loss test system described in this embodiment, the test system is used to test the circulation loss of three groups of stator bars 5, and each group includes two stator wires Rod 5, the test system includes a power supply platform 1, a protection device 2, a test platform 3 and a circulating current detection platform 4,

[0060] The power supply platform 1 includes an AC adjustable power supply 1-1 and a transformer 1-2, the AC adjustable power supply 1-1 is used to supply power to the transformer 1-2, and the protection device 2 is pasted on any one of the stator bars 5 On the end, the protection device 2 is used to control the on-off of the AC adjustable power supply 1-1,

[0061] The test platform 3 includes a wire bar connection terminal 3-2 and a multi-slot stator core 3-1. The multi-slot stator core 3-1 is a block with multipl...

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Abstract

The invention relates to a test system for circulating loss between strands of stator wire rods of a generator and a measurement method realized by the system, belonging to the field of detection of motor stator wire rods. The problem that the circulation loss of the stator bar cannot be directly measured in the existing motor loss testing technology is solved. It includes a power supply platform, a protection device, a test platform and a commutation detection platform. The test platform includes a bar connection terminal and a multi-slot stator core. The multi-slot stator core is a block with multiple grooves on the upper surface, and The number of grooves is greater than or equal to 5, the length of the grooves is equal to the length of the multi-slot stator core, each group of stator bars is placed in grooves that are not adjacent to each other, and the two stators in each groove The wire bars are arranged up and down, and the two stator wire rods in each groove and the stator wire rods and the multi-slot stator core are insulated from each other. It is mainly used to detect the circulation loss between the stator bar strands.

Description

technical field [0001] The invention belongs to the field of motor stator bar detection. Background technique [0002] The capacity of the generator is increasing day by day. How to improve the efficiency of the generator and reduce the operating loss of the generator is a research hotspot in the field of electric motors. In order to reduce the eddy current, the stator bar of a large alternator is generally composed of many strands wound in parallel, and the ends are connected by parallel sleeves. During operation, due to the different positions of the strands of the stator bar in the magnetic field, a potential difference will be formed between the strands, which will cause a circulating current between the strands, which will increase the AC resistance of the stator bar, which not only increases the generator's running time. The additional loss at the time reduces the operating efficiency of the generator, and increases the temperature difference between different strands...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/34
Inventor 梁艳萍王晨光边旭吴磊柳杨王颖
Owner HARBIN UNIV OF SCI & TECH
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