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Measuring device, measuring method and manufacturing method of motor

A technology of measuring devices and measuring parts, applied in measuring devices, force/torque/power measuring instruments, manufacturing stator/rotor bodies, etc., can solve problems such as motor quality deviation

Active Publication Date: 2021-06-11
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the conduction state between the inner peripheral surface of the groove and the rotor bar affects the torque and efficiency of the motor using the rotor, it may cause quality deviation of the motor

Method used

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  • Measuring device, measuring method and manufacturing method of motor
  • Measuring device, measuring method and manufacturing method of motor
  • Measuring device, measuring method and manufacturing method of motor

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0034] figure 1 It is an exploded perspective view of the motor according to Embodiment 1 of the present invention. figure 2 It is a plan view of the rotor core in Embodiment 1. image 3 It is a figure which shows the schematic structure of the measuring apparatus of Embodiment 1. Figure 4 will be image 3 The shown top view of the rotor and sensor unit unfolded in a straight line in the circumferential direction. Figure 5 will be Figure 4 The rotor is shown in side view with its circumferentially linear development. Figure 6 will be Figure 4 The shown side view of the sensor unit unfolded linearly in the circumferential direction. Figure 7 is to make Figure 5 The rotor shown with the Figure 6 The diagram in which the sensor units shown are superimposed is a diagram showing the relationship between the rotor and the sensor unit.

[0035] Such as figure 1 As shown, the motor 50 includes a rotor 1 , a bearing 2 , an outer shell 3 and a stator 4 . The motor 50...

Embodiment approach 2

[0076] Figure 20 It is a figure which shows the schematic structure of the measuring apparatus 62 which concerns on Embodiment 2 of this invention. In Embodiment 1 described above, in order to generate the magnetic poles of the sensor unit 5, the winding 5w is wound around the teeth 5t formed on the sensor core 5c (see also image 3 Wait). On the other hand, in the sensor unit 35 of the second embodiment, the sensor core and the teeth are not provided, and only the coil 35w is provided. The winding 35w is formed in a shape in which an alternating magnetic field is generated along the circumferential direction of the rotor core 1c. The LCR tester 6 is connected to the end 35e of the winding 35w.

[0077] In this case, the imaginary part lm(Z) of the impedance Z of the winding observed from the LCR tester 6 becomes smaller, the output voltage of the LCR tester 6 can be lowered, and the magnetic characteristics and shape of the sensor core can be excluded. the influence of t...

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PUM

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Abstract

The object is to obtain a measuring device capable of grasping the influence of the conduction state between the inner peripheral surface of the slot and the rotor bar on the generated torque and efficiency with a simpler structure and in a shorter time. The measuring device (60) includes: a winding (5w) surrounding the rotor (1) to generate an alternating magnetic field in the circumferential direction of the rotor (1); a voltage applying unit (6) applying an AC voltage to the winding (5w); and a measuring unit (6) measuring a phase difference between the AC voltage and the current applied by the voltage applying unit.

Description

technical field [0001] The present invention relates to a measuring device, a measuring method and a manufacturing method of a cage rotor. Background technique [0002] In general, a cage rotor of an induction motor uses a rotor core in which an electromagnetic steel sheet with an insulating film applied to both sides is punched out to form a ring-shaped plate, and the plates are stacked in a ring shape. to be made into a cylindrical shape. In addition, in the following description, a cage-type rotor is also simply called a rotor. A plurality of grooves extending from one end surface side of the cylindrical shape toward the other end surface side are formed in the rotor core. The rotor bar is formed by filling the slots of the rotor core with conductors by aluminum die casting or other methods. In addition, end rings for electrically connecting ends of the rotor bars are formed by aluminum die casting or the like. In the rotor, the secondary conductor is formed by the ro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L5/00G01L3/00G01R31/34H02K15/02
Inventor 川崎启宇米谷晴之大石晋也冈田顺二坪内刚史
Owner MITSUBISHI ELECTRIC CORP