JPH06165444A - Inspection device for dynamo-electric machine - Google Patents

Abstract

PURPOSE:To measure a dynamo-electric machine easily and efficiently with high accuracy by removing a dispersion of measured values depending upon measuring persons. CONSTITUTION:This device is provided with first means 6, 10, and 11, which detect positions between commutator pieces 3 of a dynamo-electric machine and detect the voltage drop during that while by electribying two pieces of commutators 3 connected to a winding 2 of the armature, and second means 7, 8, and 12 to 17, which record currents and a voltage drop each time they detect the positions between the commutator pieces 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a rotor armature winding
The present invention relates to an inspection device for a rotating electric machine for verifying the quality of a pressure equalizing wire circuit and a commutator riser and its joint.

[0002]

2. Description of the Related Art An electric current is caused to flow between commutator pieces of a DC machine, a voltage drop between them is measured, and an abnormality of an armature circuit, such as an armature winding / equalization due to variations in resistance difference or voltage drop. It is performed to verify whether or not the wire and the commutator riser and their joints are disconnected, have poor contact, or have a short circuit between adjacent layers. In this case, conventionally, two contact rods for supplying a current between adjacent commutator pieces to be measured and two contact rods for measuring a voltage drop are formed between the commutator pieces with the current terminal and the voltage terminal as a pair. The current and voltage were measured at the same time while being contacted with, and a constant current was applied, and the contact rod was sequentially moved between all the child pieces for measurement.

[0003]

According to the conventional method, it is difficult to simultaneously contact the adjacent commutator pieces with two sets of current terminals and voltage terminals, that is, a total of four pieces, and unstable elements such as fluctuations in contact resistance are encountered. Is included, and the pressing is artificial,
Since it is easy to change with time, it is unavoidable that an error occurs depending on the measurer.

In addition, there are some commutator pieces that exceed several hundred pieces to one thousand pieces, which requires a long time for measurement and requires at least two measuring personnel, and it is necessary to perform measurement while maintaining close communication with each other. was there.

The present invention has been made in view of the above problems, and an object of the present invention is to eliminate variations in measured values by a measurer, to enable high precision, easy and efficient measurement, and further An inspection device for a rotating electric machine that can automatically verify the windings and circuits of the DC machine armature in the process and in the field installation condition where the commutator length is short and the field installation condition where workability is difficult or in a narrow space. The purpose is to provide.

[0006]

In order to achieve the above object, the following means are provided. (1) As an invention corresponding to claim 1, the position between the commutator pieces of the rotary electric machine is detected, and a current is passed between two commutator pieces connected to the armature winding, and a voltage between them is applied. A first means for detecting the drop and a second means for recording the current and the voltage drop each time the position between the commutator pieces is detected are provided. (2) As an invention corresponding to claim 2, a current terminal for slidably contacting a surface of a commutator piece of a rotating electric machine to energize,
A voltage terminal that is integrated with the current terminal through an insulator and slidably contacts the surface of the commutator piece to derive a potential,
2 sets the current terminal and the voltage terminal as a pair of detection terminals
A pair of terminal holders which hold a pair of detection terminals and are arranged so as to be adjustable so that the distance between them can be adjusted according to the distance between the commutator pieces; A position detector for detecting

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment corresponding to claim 1 of the present invention is shown in FIG. In FIG. 1, reference numeral 1 is an expanded view of a part of a rotor of a DC machine, and the rotor 1 includes a large number of commutator pieces 3 connected to an armature winding 2. 6 is adjacent 2
A current terminal for contacting one of the commutator pieces 3 and supplying a current, 7 is arranged near the current terminal 6, and contacts the two commutator pieces 3 to derive a voltage drop therebetween. It is a voltage terminal. 8 is a position detector for detecting the position between the commutator pieces, and the two commutator pieces 3 having the current and voltage terminals 6 and 7 adjacent to each other.
It is to detect that it is a position crossing over. 10 is a current source that supplies a constant current to the armature winding 2 via the current terminal 6 and the commutator piece 3, 11 is a current detector that detects the current, and 12 is a commutator derived from the voltage terminal 7. It is a voltage detector that detects a voltage drop across one side. A recording timing generator 13 determines the timing of recording the current and voltage from the detection signal of the position detector 8. 14 is a counter that is incremented by the detection signal of the position detector 8, 15 is a commutator piece number setter that sets a numerical value corresponding to the number of commutator pieces, 16 is the commutator piece number setter 15 that the count value of the counter 14 is Match detector that presets the counter 14 when the set value of
Is a data recording device for recording the current, voltage, and count value at the time of the timing signal of the recording timing generator 13.

In the above structure, when inspecting a rotating electric machine, a constant current is supplied from the current source 10 while slowly rotating the rotor 1. This current is supplied to the armature winding 2 via the current terminal 6 and the commutator piece 3, and is sequentially supplied to the next commutator piece by rotation.

The voltage drop across the commutator element due to energization is derived by the voltage terminal 7, and the voltage drop across the next commutator element is derived sequentially by the rotation. Since the position detector 8 outputs the detection signal at the position where the two commutator pieces 3 contact the current terminal 6 and the voltage terminal 7, a pulse-shaped detection signal is output by rotation, and the rectification piece 3 is rotated once. Position detection signals are output. Each time the position detector 8 outputs a position detection signal, the counter 14 is incremented and the recording timing generator 13 outputs a data fetch timing signal. Each time the timing signal is input, the data recording device 17 records the current detected by the current detector 11, the voltage detected by the voltage detector 12, and the count value of the counter 14 at that time. When the rotor 1 makes one rotation and the count value of the counter 14 matches the set value of the commutator piece number setting device 15, a preset signal is output from the coincidence detector 16 and the count value of the counter 14 is set to 1 again. The measurement state is between the commutator pieces. Similarly, the measurement between all the commutator pieces can be performed with high accuracy and efficiency. The position detector 8 can be similarly implemented by detecting the rotation angle of the rotor 1 and detecting the position between the commutator pieces.

A second embodiment corresponding to claim 2 of the present invention is shown in FIG. In FIG. 2, the commutator piece 3, the current terminal 6,
The voltage terminal 7 and the position detector 8 correspond to those shown in FIG.

The current terminal 6 is made of a metal graphite brush, and is integrally provided with a voltage terminal 7 made of a metal such as a copper rod which is insulated through a sleeve 22 made of an insulating material inside. I am configuring. Two sets of such detection terminals are insulated and retained by the terminal retainer 21, the terminal retainer 21 is divided into two parts so that the distance between the detection terminals can be adjusted, and the opposing faces can be slidable so as to be slidable. It has a structure that fits in a groove and is fixed with a set screw 24. Terminal retainer divided into two 21
Each of A and 21B is provided with a spring 23 that applies a constant pressure to one end of the held detection terminal, so that the current terminal 6 and the voltage terminal 7 are surely brought into contact with the surface of the commutator piece 3. There is. One of the two divided terminal retainers (21B in the figure) is fixed to the frame 20, and this frame 20 is fixed to the support rod 30 so that the support rod 30 has a proper position relative to the commutator piece. Is fixed to the rotating electric machine side (not shown).

A position detector 8 such as a photoelectric proximity switch for detecting the groove between the commutator pieces is attached to the terminal holder 21B. The position detector 8 is arranged at a position approximately in the middle of the two sets of detection terminals.

According to the second embodiment, even if the contact area of the voltage terminal 7 is made small, the detection mechanism can be made small without falling into the groove between the commutator pieces, and can be used in a narrow space or in a small or medium-sized rotating electric machine. It can also be applied to inspection. Further, by integrating the voltage terminal 7 with the current terminal 6, the effective measurable region between the commutator pieces is widened, and the rotation speed can be increased to perform the measurement in a short time. It is also possible to further provide another set of the above-mentioned inspection device and arrange them on the pole pitch or the pressure equalizing line pitch to perform a more accurate inspection.

[0014]

According to the present invention, it is possible to obtain an inspection apparatus for a rotating electric machine which eliminates the variation caused by the measurer, enables highly accurate measurement in a short time, and can perform extremely efficient measurement. Further, it is possible to miniaturize the detection mechanism, and to obtain an inspection device for a rotating electric machine that can be used for inspecting a small space or a small-sized rotating electric machine.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a second embodiment of the present invention.

[Explanation of symbols]

 1 ... Rotor 2 ... Armature winding 3 ... Commutator piece 6 ... Current terminal 7 ... Voltage terminal 8 ... Position detector 10 ... Current source 11 ... Current detector 12 ... Voltage detector 13 ... Recording timing generator 14 ... Counter 15… Commutator piece number setter 16… Match detector 17… Data recorder 20… Frame 21… Terminal retainer 22… Insulation sleeve 23… Spring 24… Set screw 30… Support rod

Claims (2)

[Claims] 1. A first means for detecting a position between commutator pieces of a rotating electric machine, passing a current between two commutator pieces connected to an armature winding, and detecting a voltage drop therebetween. When,
An inspection apparatus for a rotating electric machine, comprising: a second means for recording the current and the voltage drop each time the position between the commutator pieces is detected. 2. A current terminal for slidably contacting a surface of a commutator piece of a rotating electric machine to be energized, and a current terminal integrated with the current terminal through an insulator to slidably contact a surface of the commutator piece. And a voltage terminal for deriving a potential, and two sets of detection terminals, each of which has the current terminal and the voltage terminal as one set of detection terminals, are held, and the distance therebetween is adjustable so as to be adjusted according to the distance between the commutator pieces. An inspection apparatus for a rotating electric machine, comprising: a pair of terminal holders provided and a position detector that is fixed to the terminal holder and detects a position of an intermediate groove of a commutator piece.