JPS5983070A - Apparatus for inspecting winding of rotary electric machine - Google Patents

Abstract

PURPOSE:To make it possible to detect the winding defect beforehand prior to assembling a rotary electric machine, by performing the inspection of winding at the point of time when the winding is wound around an iron core by providing a pulse oscillation means, a pulse distribution means, an integration means and a comparison means. CONSTITUTION:Pulses oscillated by an oscillator 1 are successively supplied to winding coils L1, L2, L3 while distributed through a driver circuit 3 so as to be shifted in a predetermined amount by a distributor 2. In the next step, pulse outputs fabricated by the oscillator 1 are further taken out while branched from the front stage of the driver circuit 3 to be respectively inputted to integrators 41, 42, 43 and, after amplified on the basis of the outputs from the winding coils L1, L2, L3, inputted to a comparator 5 where the duty or the phase of each pulse is compared to a reference value to judge whether being proper or not and to inspect whether there are disconnections or short-circuits of the winding coils L1, L2, L3 or not and the winding is different or not. By this method, the defect of the winding is inspected.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a winding inspection device h'' for a rotating electric machine such as an electric motor, and more particularly to a device for inspecting whether the winding condition of a rotating electric machine is good or bad.

Prior Art Conventionally, methods for inspecting the winding condition of rotating electric machines include 1.
After assembling the 01 converter, does it rotate? ) i 'B5 was operated and inspections were made for winding breaks, etc., depending on the operating state.

However, with the traditional method, rotary electric pak! After the winding is finished, it is a hassle to inspect whether the winding is good or bad. In some cases, it was not possible to determine whether the carpet was defective or not.

Purpose of the Invention The present invention has been made to solve the above-mentioned problems.
The winding is inspected when the winding, v; The purpose of the test is to provide li<t.

Structure of the Invention The present invention has a total of 11 objects to achieve the above-mentioned objects, and is structured as follows. In other words, a pulse is oscillated and R? pulse oscillation means for creating a constant pulse train; means for distributing the pulses to each winding coil by shifting the pulses by a predetermined amount; an integrating means for amplifying the amplification; A rotating electric machine is provided with a comparison means for comparing the data shift phase of the preceding reporter pulse with a reference value to determine whether it is appropriate or not. It is an inspection device.

Example Hereinafter, the uninvented real rotation θ・11 will be explained according to the drawings.

Wood Example &, 1. This is to inspect the rotor of a small commercial machine, and the rotor core is equipped with a winding coil (t,, ) (L2)
(I='l), each winding coil (T,,) (L
,)(L,)Id I'm afraid of Y-shaped connections.

The generator (1) generates the pulse shown in FIG. By shifting by a predetermined amount, each winding coil ('J-+) (]-p > (LA)
The remaining power is supplied via the driver circuit (3). Then, the pulse output generated by the oscillator (1) is further branched out from the @11 stage of the driver circuit (3).
, respectively input to the divider (4+) (42) (43) [
2. Based on the pulse output from the winding coil (TJ2) (Lg), input the amplified signal to the comparator (5), and compare the duty or phase of each pulse with the reference value. , Soi] Is it appropriate or not? The winding coils (Ll) (L2) (LJ) are checked to see if there is a disconnection or short circuit, or if the windings are different.7, and the windings are checked to see if they are good or bad.

Figures 3 through 5 show the waveforms when an oscilloscope is used as a comparison means. Figure 5 shows the σ1 waveforms for a good product, and Figures 074 and 5 show waveforms for a defective product. be.

To give a false explanation about pulse input when using an oscilloscope, each distribution is approximately the same phase as the waveform of the oscilloscope. l', i (C driver (b)) is output from the path (3), and the oscillator (1 [
The pulp output created by each winding coil (L, ) (
Looking at the pulse output from L, ) (L, ), amplification H:
4 (41) (4?) Input 1 increment to 4 (4,). Now, each winding coil (Ll) (L2) (Lx)
When the impedances of 2 and 2 are almost equal, when looking at the output waveform with an oscilloscope, the internal lines of the filtrate and ti overlap as shown in Figure 3. tl(・Paired, each winding coil (T-,,) (L, ) (IU
) When an abnormality occurs in the lines of force, etc., a phase shift will occur as shown in FIG. 4 or FIG. 5, and it can be determined that the product is defective.

As described in detail, the present invention firstly enables the winding coil of a rotating electrical machine to be operated under pulse drive under conditions substantially equal to the state in which the rotating M is in operation (2). Since each impedance can be measured, defects that could only be discovered after the rotating electrical machine was launched using conventional methods can be detected at the MiT stage when the winding coils have been fully wound, and it is possible to detect defects in the winding. In addition to being useful for early detection, it is possible to instantly identify all winding defects with the inspection equipment (= 1), which greatly improves inspection work efficiency and improves the assembly efficiency of rotating electric machines. can be achieved.

[Brief explanation of the drawing]

11th IQ is a schematic block diagram showing an embodiment of the present invention. FIG. 2 is a diagram showing a pulse waveform used in the final example, and (a) is a diagram showing a 7ζ pulse waveform created by an oscillator. , (1)) is H21-c indicating the pulse wave 113 distributed to each winding coil by the distributor. The output waveform of ↓ 1 is shown using a rice bowl 70 scope as a means of comparison. 1 - 1 is 1, and 3154 is the waveform of a good product. 1 to 1, 4th same month, and 2+¥5 are the waveform diagrams of defective products. A, > (5th. > CAI)...111 separator, (5)... comparator, (L, ) (L2) (L, )...
winding coil.

Claims (1)

[Claims] (1) Pulse oscillation means that oscillates pulses to create a predetermined pulse train, distribution means that shifts the pulses by a predetermined amount and distributes them to each winding coil, and outputs the pulse output created by the oscillation means from each winding coil. 1. A winding inspection device for a rotating electrical machine, comprising: an integrating means for amplifying the pulses based on the amplified pulses; and a comparing means for comparing the duty or phase of each amplified pulse with a reference value to determine whether or not they are appropriate.