JP7131476B2 - Insulation inspection device and insulation inspection method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulation inspection apparatus and an insulation inspection method for inspecting the insulation state of a film of a wire material forming a coil of a rotating electric machine.

2. Description of the Related Art Conventionally, various devices have been proposed for forming coils that constitute a rotating electric machine (see, for example, Patent Document 1).

In addition, many vehicles such as electric vehicles and hybrid vehicles are equipped with high-voltage, inverter-controlled rotating electric machines from the viewpoint of miniaturization and high efficiency.

In such rotating equipment, there is a problem that the inverter surge penetrates the wires, erodes the insulating coating due to partial discharge, and reduces the withstand voltage life of the rotating equipment. Therefore, PDIV (Partial Discharge Inception Voltage) measurement is performed to check coating erosion and film thickness reduction due to partial discharge before shipping to ensure high reliability.

In the PDIV measurement, the insulation between the phases is inspected before the U-phase, V-phase and W-phase wire rods inserted into the slots of the core are connected at the neutral point. The phase-to-phase insulation test refers to an insulation test between a wire of a given phase and a wire of another phase. Specifically, for example, in an insulation inspection between a U-phase wire and a V-phase wire, one probe of the insulation inspection device is connected to the U-phase wire, and the other probe is connected to the V-phase wire. Then, an AC voltage is applied from the insulation inspection device to the U-phase and V-phase wire rods, and the amount of discharge charge due to partial discharge is measured.

JP 2014-158413 A

In such a rotating device, the covering of the portions connected at the neutral point of the U-phase, V-phase and W-phase wire rods is stripped. Therefore, in the insulation inspection of such rotating equipment, before applying an AC voltage and measuring the discharge charge amount due to partial discharge, an operator separates the U-phase, V-phase, and W-phase wires from each other to separate the U-phase wires. , V-phase and W-phase wire rods. Furthermore, after applying an AC voltage and measuring the discharge charge amount due to partial discharge, the operator removes the insulating member.

For this reason, there is a problem that the insulation inspection requires a large number of man-hours and the insulation inspection takes a long time.

SUMMARY OF THE INVENTION It is an object of the present invention to reduce the man-hours and time required for insulation inspection.

In order to achieve the above object, the invention according to claim 1 provides a U-phase, V-phase, and W-phase coils inserted into a slot (20) formed in a cylindrical core (2) of an armature of a rotating electric machine. An insulation inspection device for inspecting the insulation state of the coating of each wire rod (21 to 23) before the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod are connected, the first terminal (31 ) and a second terminal (32) for applying a predetermined voltage between the first terminal and the second terminal; A switching portion (4) for switching between the electrically connected state and the disconnected state of the second terminal; 131, 141), and move the engaging portion to separate the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod from each other; In a state in which the wire rod, the V-phase wire rod, and the W-phase wire rod are separated from each other, the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod are placed between the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod. An insulating member inserting portion (170) for inserting an insulating member (300) for insulating between the phase wires, and insulation between the U-phase wire, the V-phase wire, and the W-phase wire by the insulating member inserting portion. With the member inserted, a predetermined voltage is applied between the member electrically connected to the first terminal and the member electrically connected to the second terminal among the U-phase, V-phase, and W-phase wires. and a discharge amount measuring unit (5) for measuring the amount of discharge generated when is applied.

According to the above-described configuration, the insulating member inserting portion separates the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod from each other by the hook moving portion. An insulating member (300) for insulating the U-phase wire, the V-phase wire, and the W-phase wire is inserted between the W-phase wire.

Then, the discharge amount measuring unit is configured such that the member electrically connected to the first terminal and the second terminal are connected in a state in which the insulating member is inserted between the U-phase wire, the V-phase wire, and the W-phase wire. The amount of discharge that occurs when a predetermined voltage is applied between a member electrically connected to is measured. Therefore, the man-hours and time required for the insulation inspection can be reduced.

In order to achieve the above object, the invention according to claim 5 provides a U-phase, V-phase, and W-phase coils inserted into a slot (20) formed in a cylindrical core (2) of an armature of a rotating electric machine. An insulation inspection method for inspecting the insulation state of the coating of each wire rod (21 to 23) before the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod are connected, the first terminal (31 ) and a second terminal (32) for applying a predetermined voltage between the first terminal and the second terminal; Preparing a switching part (4) for switching between the electrically connected state and the disconnected state of the first terminal and the second terminal, and locking for hooking at least two wire rods out of each of the U-phase, V-phase and W-phase wire rods. preparing hook moving parts (130, 140) for moving locking parts (131, 141) having claws to separate the U-phase wire, the V-phase wire, and the W-phase wire from each other; (131, 141) is moved to instruct the hook moving part to separate the U-phase wire, the V-phase wire, and the W-phase wire, and the U-phase wire, the V-phase wire, and the W-phase wire Insulation that insulates between the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod, and between the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod, in a state where the wires are separated from each other. By inserting the member (300) and inserting the insulating member between the U-phase wire rod, the V-phase wire rod and the W-phase wire rod, the U-phase, V-phase and W-phase wire rods measuring the amount of discharge that occurs when a predetermined voltage is applied between a member electrically connected to the first terminal and a member electrically connected to the second terminal. As described above, the feature of the present invention can also be regarded as an insulation inspection method.

It should be noted that the reference numerals in parentheses attached to each component etc. indicate an example of the correspondence relationship between the component etc. and specific components etc. described in the embodiments described later.

It is the figure which showed the whole insulation test|inspection apparatus structure. It is the figure which showed the circuit structure of an insulation test|inspection apparatus. FIG. 4 is a diagram showing U-phase, V-phase and W-phase wires inserted into slots of a stator core. It is the figure which showed the process of an insulation test. FIG. 4 is a diagram showing a first hook cylinder, a second hook cylinder, and a pusher cylinder arranged to wait for a stator core; FIG. 3 is a diagram showing a state in which a U-phase wire, a V-phase wire, and a W-phase wire are separated from each other; 4 is an external view of an insulating member; FIG. FIG. 5 is a diagram showing a state in which insulating members are arranged between a second wire rod portion of a U-phase wire rod, a second wire rod portion of a V-phase wire rod, and a second wire rod portion of a W-phase wire rod;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in each of the following embodiments, the same or equivalent portions are denoted by the same reference numerals, and description thereof will be omitted.

(First embodiment)
An insulation inspection apparatus 1 according to a first embodiment will be described with reference to FIGS. 1 to 3. FIG. The insulation inspection apparatus 1 of this embodiment is an apparatus for inspecting the insulation state of the films of a plurality of wires 21 to 23 inserted into slots 20 formed in a stator core 2 of a rotating electric machine as shown in FIG. Note that the rotating electric machine of the present embodiment is a high voltage ISG (Integrated Stator Generator) mounted on an electric vehicle.

First, the overall configuration of the insulation inspection device 1 will be described with reference to FIG. The insulation inspection apparatus 1 includes a conveyor 100, a pallet 110, a top plate 120, a first hook cylinder 130, a second hook cylinder 140, a pusher cylinder 150, a chuck mechanism 160, and an insulating member moving mechanism 170, as shown in FIG. ing.

The first hook cylinder 130 and the second hook cylinder 140 correspond to a hook moving portion, the pusher cylinder 150 corresponds to a pusher moving portion, and the insulating member moving mechanism 170 corresponds to an insulating member inserting portion.

The conveyor 100 horizontally conveys a pallet 110 on which the stator core 2, which is an object to be inspected, is mounted. The conveyor 100 conveys the pallet 110 on which the stator core 2 is mounted to a position below the central portion of the top plate 120 in the vertical direction.

A transport mechanism (not shown) that transports the pallet 110 upward in the vertical direction is arranged on the lower surface side of the top plate 120 .

The pallet 110 on which the stator core 2 is mounted is transported by the conveyor 100 to a position below the central portion of the top plate 120 in the vertical direction. After that, the top plate 120 is transported vertically upward by a transport mechanism (not shown) so that the stator core 2 is exposed on the upper surface of the top plate 120 through a hole arranged in the central portion of the top plate 120 .

First hook cylinder 130 , second hook cylinder 140 and pusher cylinder 150 are fixed to the upper surface of top plate 120 . The first hook cylinder 130 and the second hook cylinder 140 temporarily separate the U-phase, V-phase, and W-phase wires 21 to 23 of the stator core 2 during insulation inspection. The pusher cylinder 150 pushes the U-phase, V-phase, and W-phase wire rods 21 to 23 of the stator core 2 back to their original positions after the insulation inspection.

The chuck mechanism 160 has three chucks 161 that grip one ends 211 to 231 of the wire rods 21 to 23 of the U-phase, V-phase, and W-phase of the stator core 2 . The chuck mechanism 160 grips the ends of the U-phase, V-phase, and W-phase wire rods 21 to 23 of the stator core 2 arranged to be exposed from the holes in the top plate 120 .

The first chuck 161 grips one end 211 of the U-phase wire 21, the second chuck 161 grips one end 221 of the V-phase wire 22, and the third chuck 161 grips the W-phase. hold one end 231 of the wire rod 23 of .

The insulating member moving mechanism 170 vertically moves an insulating member 300 , which will be described later, at the central portion of the top plate 120 . The insulating member moving mechanism 170 vertically moves between the U-phase, V-phase, and W-phase wires 21 to 23 temporarily separated by the first hook cylinder 130 and the second hook cylinder 140 during insulation inspection. The insulating member 300 is inserted from above. Further, the insulating member moving mechanism 170 lifts the insulating member upward in the vertical direction after finishing the measurement of the amount of discharged electric charge.

Next, the circuit configuration of the insulation inspection device 1 of this embodiment will be described with reference to FIG. The insulation inspection device 1 includes a power supply unit 3, a switching unit 4, a discharge amount measuring unit 5, a control unit 7, a first hook cylinder 130, a second hook cylinder 140, a pusher cylinder 150, a chuck mechanism 160, and the like.

The power supply unit 3 is configured by an AC power supply. The power supply section 3 has a first terminal 31 and a second terminal 32 and outputs a predetermined AC voltage between the first terminal 31 and the second terminal 32 according to an instruction from the control section 7 . The first terminal 31 is connected to the switching section 4 via the wiring 8 . The second terminal 32 is connected to the switching section 4 via the wiring 9 .

A U-phase wire 21 , a V-phase wire 22 , and a W-phase wire 23 are electrically connected to the switching portion 4 . As shown in FIG. 3 , U-phase wire 21 , V-phase wire 22 , and W-phase wire 23 are inserted into slots 20 formed in stator core 2 . FIG. 3 schematically shows part of the stator core 2 and parts of the U-phase wire 21, the V-phase wire 22, and the W-phase wire 23 inserted into the slots 20 thereof. The wires 21 to 23 are also called segment coils.

As shown in FIGS. 2 and 3, the U-phase wire 21, the V-phase wire 22, and the W-phase wire 23 are connected in series. The U-phase wire rod 21, the V-phase wire rod 22, and the W-phase wire rod 23 are connected at the neutral point N in the Y-connection.

One end 211 of the U-phase wire rod 21 is connected to the switching unit 4 via the first chuck 161 and the power line 41 . One end 221 of the V-phase wire 22 is connected to the switching unit 4 via the second chuck 161 and the power line 42 . One end 231 of the W-phase wire 23 is connected to the switching unit 4 via the third chuck 161 and the power line 43 .

The switching unit 4 switches one wiring 8 connected to the first terminal 31 and the other wiring 9 connected to the second terminal 32 to the U-phase wire 21, the V-phase wire 22, and the W-phase wire 23. It is a changeover switch that can switch between an electrical connection state and a disconnection state with.

Discharge amount measurement unit 5 includes a member electrically connected to first terminal 31 via switching unit 4 among U-phase wire 21 , V-phase wire 22 , and W-phase wire 23 , and switching unit 4 . The amount of discharge generated between the member electrically connected to the second terminal 32 via is measured. Specifically, the discharge amount measurement unit 5 monitors the discharge pulse signal generated by the partial discharge, measures the discharge charge amount based on the discharge pulse signal, and displays the measured discharge charge amount on the display unit. .

The control unit 7 is configured as a computer including a CPU, ROM, RAM, I/O, etc., and performs various processes according to programs stored in the ROM.

The control unit 7 is connected with the power supply unit 3, the switching unit 4, the discharge amount measuring unit 5, the first hook cylinder 130, the second hook cylinder 140, the pusher cylinder 150, the chuck mechanism 160, and the like.

The control unit 7 transmits and receives data to and from the power supply unit 3, the switching unit 4, the discharge amount measuring unit 5, the first hook cylinder 130, the second hook cylinder 140, the pusher cylinder 150, and the chuck mechanism 160, thereby performing the inspection on the object to be inspected. A certain stator core 2 is inspected for insulation.

Next, the inspection process of the insulation inspection by the insulation inspection device 1 will be described with reference to FIGS. 4 to 8. FIG. In this inspection, the insulating state of each of the wire rods 21 to 23 of the U-phase, V-phase, and W-phase inserted into the slots 20 formed in the cylindrical stator core 2 of the armature of the rotating electric machine is compared with that of the U-phase wire rod. The V-phase wire rod and the W-phase wire rods 21 to 23 are inspected before they are connected at the neutral point N. FIG.

First, in S102, the operator prepares the insulation inspection device 1 and the stator core 2, which is an object to be inspected. The insulation inspection device 1 includes a power supply unit 3, a switching unit 4, a discharge amount measuring unit 5, first and second hook cylinders 130 and 140, a pusher cylinder 150, a chuck mechanism 160, and the like. Then, the operator electrically connects the power supply unit 3, the switching unit 4, and the discharge amount measuring unit 5, and puts the insulation inspection device 1 into an operating state.

Next, in S104, the control unit 7 determines whether or not the pallet 110 on which the stator core 2, which is the object to be inspected, is mounted has been transported to a predetermined position.

The pallet 110 on which the stator core 2 is mounted is transported vertically downward in the center of the top plate 120 by the conveyor 100, and then transported vertically upward by a transport mechanism (not shown).

At this time, as shown in FIG. 5, the stator core 2 rises from the lower side in the vertical direction and stops at a position where the first hook cylinder 130, the second hook cylinder 140 and the pusher cylinder 150 provided on the top plate 120 wait.

By the way, the U-phase wire rod 21 includes a first wire rod portion 212a extending in the circumferential direction of the stator core 2 toward a portion to which the U-phase, V-phase, and W-phase wires 21 to 23 are connected, and the first wire rod portion 212a. and a second wire rod portion 212b that is bent from the end of the core and extends in the axial direction of the core.

The V-phase wire rod 22 includes a first wire rod portion 222a extending in the circumferential direction of the stator core 2 toward the portions to which the U-phase, V-phase, and W-phase wires 21 to 23 are connected, and the first wire rod portion 222a. and a second wire rod portion 222b that is bent from the end of the core and extends in the axial direction of the core.

Further, the W-phase wire rod 23 includes a first wire rod portion 232a extending in the circumferential direction of the stator core 2 toward the portions to which the U-phase, V-phase, and W-phase wires 21 to 23 are connected, and the first wire rod portion 232a. and a second wire rod portion 232b that is bent from the end of the core and extends in the axial direction of the core.

The second wire portions 212b to 232b of the U-phase wire 21, the V-phase wire 22, and the W-phase wire 23 are connected to each other.

In the insulation test, the second wire portions 212b to 23b of the U-phase wire 21, the V-phase wire 22, and the W-phase wire 23 are insulated from each other.

The first hook cylinder 130 has a hook 131 for hooking the first wire portion 232a of the W-phase wire 23 . The hook 131 has a bar shape, and a locking claw 131a extending downward from the upper side of the stator core 2 in the vertical direction is formed at the tip of the hook 131 .

The second hook cylinder 140 also has a hook 141 for hooking the first wire portion 212a of the U-phase wire 21 . The hook 141 has a bar shape, and a locking claw 141 a extending downward from the upper side of the stator core 2 in the vertical direction is formed at the tip of the hook 141 .

The pusher cylinder 150 also has a pusher 151 that pushes the first wire portion 232a of the W-phase wire 23 . The pusher 151 has a bar shape, and a locking claw (not shown) extending from the upper side to the lower side of the stator core 2 in the vertical direction is formed at the tip of the pusher 151 .

When the pallet 110 on which the stator core 2 is mounted moves upward in the vertical direction and is transported to a position where the stator core 2 is exposed through the hole arranged in the center of the top plate 120, a transport mechanism (not shown) sends a signal to the controller. 7 is notified that the pallet 110 has been transported to a predetermined position.

Upon receiving this notification, the control unit 7 determines that the pallet 110 has been transported to the predetermined position. Then, in S106, the control unit 7 moves the hooks 131 and 141 to separate the U-phase wire rod 21, the V-phase wire rod 22, and the W-phase wire rod 23 from each other. Point to cylinder 140 .

As shown in FIG. 6 , the first hook cylinder 130 moves the hook 131 radially outward of the stator core 2 , and the second hook cylinder 140 moves the hook 141 radially outward of the stator core 2 . As a result, the U-phase wire rod 21 is hooked by the locking claw 131a, the W-phase wire rod 23 is hooked by the locking claw 141a, and the U-phase wire rod 21 and the W-phase wire rod 23 are elastically deformed. , the V-phase wire 22 and the W-phase wire 23 are separated from each other.

Next, in S108, the control unit 7 separates the U-phase wire 21, the V-phase wire 22, and the W-phase wire 23 from each other. The insulating member moving mechanism 170 is instructed to insert the insulating member 300 between it and the W-phase wire 23 .

The insulating member moving mechanism 170 has a gripper 171 that grips the insulating member 300 shown in FIG. The insulating member moving mechanism 170 moves the insulating member 300 gripped by the gripping portion 171 from the upper side to the lower side in the vertical direction, and provides insulation between the U-phase wire 21, the V-phase wire 22, and the W-phase wire 23. Insert member 300 .

As a result, as shown in FIG. 8, between the second wire rod portion 212b of the U-phase wire rod 21, the second wire rod portion 222b of the V-phase wire rod 22, and the second wire rod portion 232b of the W-phase wire rod 23, The insulating member 300 is arranged in the . The U-phase wire 21, the V-phase wire 22, and the W-phase wire 23 are insulated from each other.

Next, in S110, the controller 7 instructs the chuck mechanism 160 to grip the ends 211 to 231 of the wires 21 to 23 of the U-phase, V-phase, and W-phase of the stator core 2, respectively.

As a result, the first chuck 161 of the chuck mechanism 160 grips the end of the U-phase wire 21, the second chuck 161 grips the end of the V-phase wire 22, and the third chuck 161 grips the end of the V-phase wire 22. chuck 161 grips the end of the W-phase wire rod 23 .

Next, in S112, the control unit 7 causes the switching unit 4 to switch one wiring 8 connected to the first terminal 31 to the U-phase wire 21, the V-phase wire 22, and the W-phase wire 23, and the second wiring 8 to the second terminal 31. It instructs connection with the other wiring 9 connected to the terminal 32 . For example, in the insulation test between the U-phase wire 21 and the V-phase wire 22 , one wiring 8 connected to the first terminal 31 is connected to the U-phase wire 21 , and the second terminal 32 is connected to the U-phase wire 8 . An instruction is given to connect the other wiring 9 and the V-phase wire 22 .

As a result, the switching unit 4 connects one wiring 8 connected to the first terminal 31 to the U-phase wire 21, and connects the other wiring 9 connected to the second terminal 32 to the V-phase wire 22. to connect.

Next, in S114, the control unit 7 instructs the power supply unit 3 and the discharge amount measurement unit 5 to perform PDIV measurement. Specifically, the power supply unit 3 is instructed to output a predetermined AC voltage between the first terminal 31 and the second terminal 32, and the discharge amount measurement unit 5 is instructed via the switching unit 4 An instruction is given to measure the amount of discharge generated between the first terminal 31 and the member electrically connected to the second terminal 32 . In response to this, the discharge amount measurement unit 5 monitors the discharge pulse signal generated by the partial discharge, measures the discharge charge amount based on the discharge pulse signal, and displays the measured discharge charge amount on the display unit. .

Such treatment is performed between the U-phase wire 21 and the V-phase wire 22, between the V-phase wire 22 and the W-phase wire 23, and between the W-phase wire 23 and the U-phase wire 21. , and the PDIV measurement is completed when the measurement of all discharge charge amounts is completed.

The operator determines whether or not the films of the wires 21 to 23 are standardized products that satisfy predetermined quality standards based on the measured value of the discharge charge amount. Specifically, when the measured value of the discharge charge amount is smaller than a predetermined threshold value, the operator determines that the coating of the wire rod is a standardized product that satisfies a predetermined quality standard. On the other hand, when the measured value of the discharge charge amount is larger than the predetermined threshold value, the operator determines that the film of the wire rod is a substandard product that does not meet the predetermined quality standards.

Next, the controller 7 instructs the insulating member moving mechanism 170 to remove the insulating member 300 in S116. Thereby, the insulating member moving mechanism 170 moves the insulating member 300 upward in the vertical direction to remove the insulating member 300 from between the U-phase wire 21 , the V-phase wire 22 , and the W-phase wire 23 .

Next, in S118, the control unit 7 controls the first hook cylinder 130, the second hook cylinder 140, and the pusher cylinder to return the positions of the wires 21 to 23 of the stator core 2 to the original positions before they were moved in S106. Point to 150.

Thereby, the first hook cylinder 130 moves the hook 131 to its original position, and the second hook cylinder 140 moves the hook 141 to its original position. Further, the pusher cylinder 150 pushes the separated U-phase wire 21 back to the position before it was separated. As a result, the U-phase wire rod 21 and the W-phase wire rod 23 return to the shapes before being elastically deformed.

Next, in S120, the controller 7 instructs the chuck mechanism 160 to open the three chucks 161 that hold the ends of the wire rods of the U phase, V phase, and W phase of the stator core 2. .

In response to this instruction, the chuck mechanism 160 opens the three chucks 161 that hold the ends of the U-phase, V-phase, and W-phase wire rods of the stator core 2, and ends the insulation inspection.

When the main insulation inspection is completed, the pallet 110 on which the stator core 2 is mounted is transported downward in the vertical direction by a transport mechanism (not shown), and then vertically downward in the central portion of the top plate 120 by the conveyor 100. From the position it is transported horizontally towards the original position.

As described above, the insulation inspection apparatus 1 is capable of inspecting each of the U-phase, V-phase, and W-phase wire rods 21 to 23 inserted into the slots 20 formed in the cylindrical stator core 2 of the armature of a rotating electric machine. The insulating state of the film is inspected before the U-phase wire, the V-phase wire, and the W-phase wire are connected.

A power supply unit 3 having a first terminal 31 and a second terminal 32 and applying a predetermined voltage between the first terminal 31 and the second terminal 32 is provided. Further, a switching unit 4 is provided for switching between the electrical connection state and disconnection state of the first terminal 31 and the second terminal 32 with respect to the wires 21 to 23 of the U-phase, V-phase, and W-phase.

In addition, hooks 131 and 141 having locking claws for hooking two of the wires 21 to 23 are provided. are provided with first and second hook cylinders 130, 140 that separate the

The U-phase wire 21, the V-phase wire 22, and the W-phase wire 23 are separated from each other by the first and second hook cylinders 130 and 140, and the U-phase wire 21 and the V-phase wire 22 are separated from each other. and the wire rod 23 of the W phase.

In addition, the member connected to the first terminal 31 and the second terminal 32 are connected with the insulating member 300 inserted between the U-phase wire 21, the V-phase wire 22, and the W-phase wire 23. A discharge amount measuring unit 5 is provided for measuring the amount of discharge generated when a predetermined voltage is applied to the member.

According to the above-described configuration, the insulating member moving mechanism 170 moves the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod away from each other by the first and second hook cylinders 130 and 140 . An insulating member 300 is inserted between the U-phase wire, the V-phase wire, and the W-phase wire to insulate the U-phase wire, the V-phase wire, and the W-phase wire.

Then, the discharge amount measuring unit 5 connects the member connected to the first terminal and the second terminal in a state in which an insulating member is inserted between the U-phase wire, the V-phase wire, and the W-phase wire. The amount of discharge generated when a predetermined voltage is applied between the member and the member is measured. Therefore, the man-hours and time required for the insulation inspection can be suppressed.

Further, the insulation inspection apparatus 1 pushes back at least one of the U-phase wire, the V-phase wire, and the W-phase wire separated by the first and second hook cylinders 130 and 140 to the position before being separated. A pusher cylinder 150 is provided.

Therefore, after the discharge amount measuring unit 5 measures the discharge amount, at least one of the U-phase wire, the V-phase wire, and the W-phase wire separated by the first and second hook cylinders 130 and 140 is It is possible to reliably return to the position before being pulled apart.

The U-phase wire rod, the V-phase wire rod, and the W-phase wire rod extend in the circumferential direction of the core toward the portion where the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod are connected. It has portions 212a, 222a and 232a. Furthermore, it has second wire rod portions 212b, 222b, 232b that bend from the ends of the first wire rod portions 212a, 222a, 232a and extend in the axial direction of the stator core 2 . Further, the second wire portions of the U-phase wire, the V-phase wire, and the W-phase wire are converged.

The first and second hook cylinders 130 and 140 move the engaging portions in which the engaging claws are hooked to at least two of the first wire rod portions of the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod. The U-phase wire, the V-phase wire, and the W-phase wire are separated from each other.

Therefore, compared with the case where the locking claw is hooked on the second wire rod portions 212b, 22b, and 23b, the locking claw can be stably hooked, and the insulation inspection can be efficiently performed.

Further, the first and second hook cylinders 130 and 140 move the engaging portions in a direction crossing the axial direction of the stator core 2 to separate the U-phase wire, the V-phase wire, and the W-phase wire from each other. Further, the insulating member moving mechanism 170 inserts the insulating member 300 between the second wire portions of the U-phase wire, the V-phase wire, and the W-phase wire in the axial direction of the stator core 2 .

In this way, the direction in which the first and second hook cylinders 130 and 140 move the locking portion differs from the direction in which the insulating member moving mechanism 170 inserts the insulating member 300, so the inspection time for the insulation inspection can be shortened. It is possible.

In addition, the insulation inspection method of the present embodiment is applied to the films of the U-phase, V-phase, and W-phase wire rods 21 to 23 inserted into the slots (20) formed in the cylindrical core 2 of the armature of the rotating electric machine. is inspected before the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod are connected.

And it includes preparing a power supply section (3) having a first terminal (31) and a second terminal (32) and applying a predetermined voltage between the first terminal and the second terminal.

Further, it includes preparing a switching unit (4) for switching between an electrical connection state and a disconnection state of the first terminal and the second terminal for each of the U-phase, V-phase, and W-phase wires.

In addition, by moving the locking portions (131, 141) having locking claws for hooking at least two of the U-phase, V-phase, and W-phase wires, the U-phase wire, the V-phase wire, and the W-phase wire are moved. and providing hook travels (130, 140) for pulling the wires of the wire apart from each other.

In addition, it includes instructing the hook moving part to move the locking parts (131, 141) to separate the U-phase wire, the V-phase wire, and the W-phase wire from each other.

Further, in a state in which the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod are separated from each other, the U-phase wire rod and the V-phase wire rod are placed between the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod. This includes inserting an insulating member 300 for insulation between the phase wire and the W phase wire.

Further, in a state in which the insulating member is inserted between the U-phase wire, the V-phase wire, and the W-phase wire, the first terminals of the U-phase, V-phase, and W-phase wires are electrically connected to each other. and measuring the amount of discharge generated when the predetermined voltage is applied between the member connected to the second terminal and the member electrically connected to the second terminal. As described above, the features of the present invention can also be taken as a manufacturing method.

(Other embodiments)
(1) Although the insulation inspection apparatus 1 of the above-described embodiment is described as inspecting the insulation state of the coating of the wire attached to the stator core 2 as the armature of the rotating electrical machine, the invention is not limited to this. The insulation inspection device 1 may inspect the insulation state of a film of a wire attached to a rotor core, which is an armature of a rotating electric machine.

(2) In the above embodiments, the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod are Y-connected. It can also be applied to multiple parallel connections, such as wire connections.

(3) In the above embodiment, in S114, the control unit 7 instructs the power supply unit 3 and the discharge amount measurement unit 5 to perform PDIV measurement, and the operator performs the measurement of the wire rods 21 to 23 based on the measured value of the discharge amount. It is determined whether or not the film is a standard product that satisfies predetermined quality standards. However, the control unit 7 may determine whether or not the films of the wires 21 to 23 are standardized products that satisfy predetermined quality standards based on the measured value of the discharge charge amount.

(4) In the above embodiment, the first hook cylinder 130 moves the first wire portion 232a of the W-phase wire 23, and the second hook cylinder 140 moves the first wire portion 212a of the U-phase wire 21. made it However, the number of hook cylinders and the wire rods moved by the hook cylinders are not limited to those described in the above embodiment.

(5) In the above embodiment, the pusher cylinder 150 pushes back the U-phase wire rod 21 that has been separated. However, the number of pusher cylinders and the wire pushed back by the pusher cylinders are not limited to those described in the above embodiment.

It should be noted that the present invention is not limited to the above-described embodiments, and can be appropriately modified within the scope of the claims. Moreover, the above-described embodiments are not unrelated to each other, and can be appropriately combined unless the combination is clearly impossible. Further, in each of the above-described embodiments, it goes without saying that the elements constituting the embodiment are not necessarily essential, unless it is explicitly stated that they are essential, or they are clearly considered essential in principle. stomach. In addition, in each of the above-described embodiments, when numerical values such as the number, numerical value, amount, range, etc. of the constituent elements of the embodiment are mentioned, when it is explicitly stated that they are particularly essential, and when they are clearly limited to a specific number in principle It is not limited to that specific number, except when In addition, in each of the above-described embodiments, when referring to the material, shape, positional relationship, etc. of the constituent elements, unless otherwise specified or in principle limited to a specific material, shape, positional relationship, etc. , its material, shape, positional relationship, and the like.

(summary)
According to the first aspect shown in part or all of the above embodiments, the insulation inspection device includes a U-phase and a V-phase inserted into a slot formed in a cylindrical core of an armature of a rotating electric machine. , and W-phase wire rods. A power supply section having a first terminal and a second terminal and applying a predetermined voltage between the first terminal and the second terminal is provided. A switching unit is provided for switching between an electrical connection state and a disconnection state of the first terminal and the second terminal for each of the U-phase, V-phase, and W-phase wires.

In addition, it has an engaging portion having an engaging claw for engaging at least two of the U-phase, V-phase, and W-phase wires, and the U-phase wire and the V-phase wire are moved by moving the engaging portion. A hook moving part is provided for separating the W-phase wire from each other.

In addition, in a state in which the U-phase wire, the V-phase wire, and the W-phase wire are separated from each other by the hook moving portion, the U-phase wire is placed between the U-phase wire, the V-phase wire, and the W-phase wire. An insulating member inserting portion is provided for inserting an insulating member for insulating between the wire, the V-phase wire, and the W-phase wire.

Further, in a state in which the insulating member is inserted between the U-phase wire, the V-phase wire, and the W-phase wire by the insulating member insertion portion, the first terminal of each of the U-phase, V-phase, and W-phase wires and a discharge amount measuring unit for measuring the amount of discharge between the member connected to the second terminal and the member connected to the second terminal.

According to the second aspect, the insulation inspection device pushes back at least one of the U-phase wire, the V-phase wire, and the W-phase wire separated by the hook moving part to the position before being separated. It has a pusher moving part.

Therefore, after the discharge amount measuring unit 5 measures the discharge amount, at least one of the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod separated by the hook moving part is reliably in the position before being separated. It is possible to return to

According to the third aspect, the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod extend toward the portion where the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod are connected to the core. It has a first wire rod portion extending in the circumferential direction of the. Moreover, it has the 2nd wire rod part which bends from the edge part of the 1st wire rod part, and extends in the axial direction of a core. Further, the second wire portions of the U-phase wire, the V-phase wire, and the W-phase wire are converged.

In addition, the hook moving portion moves the engaging portion in which the engaging claw is hooked on at least one of the first wire rod portions of the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod, thereby moving the U-phase wire rod and the V-phase wire rod. The phase wire and the W phase wire are separated from each other.

Therefore, compared with the case where the locking claw is hooked on the second wire portion, the locking claw can be stably hooked, and the insulation inspection can be efficiently performed.

According to the fourth aspect, the hook moving portion moves the locking portion in a direction intersecting the axial direction of the core to separate the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod from each other. The insulating member inserting portion inserts the insulating member between the second wire portions of the U-phase wire, the V-phase wire, and the W-phase wire in the axial direction of the core.

In this manner, the direction in which the hook moving portion moves the locking portion is different from the direction in which the insulating member inserting portion inserts the insulating member, so it is possible to shorten the inspection time of the insulation inspection.

According to a fifth aspect, an insulation inspection method is provided for measuring the insulation state of coatings of U-phase, V-phase, and W-phase wire rods inserted into slots formed in a cylindrical core of an armature of a rotating electric machine. is inspected before the U-phase wire, the V-phase wire, and the W-phase wire are connected.

The method includes preparing a power supply unit having a first terminal and a second terminal and applying a predetermined voltage between the first terminal and the second terminal.

Further, it includes preparing a switching unit for switching between an electrical connection state and an electrical disconnection state of the first terminal and the second terminal for each of the U-phase, V-phase, and W-phase wires.

Further, it has a locking portion having a locking pawl for hooking at least two of the U-phase, V-phase, and W-phase wires, and the locking portion is moved to move the U-phase wire and the V-phase wire. and the W-phase wire are provided.

Further, the method includes instructing the hook moving part to move the locking part to separate the U-phase wire, the V-phase wire, and the W-phase wire from each other.

Further, in a state in which the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod are separated from each other, the U-phase wire rod and the V-phase wire rod are placed between the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod. This includes inserting an insulating member to provide insulation between the phase wire and the W phase wire.

Further, in a state in which the insulating member is inserted between the U-phase wire, the V-phase wire, and the W-phase wire, the first terminals of the U-phase, V-phase, and W-phase wires are electrically connected to each other. and measuring the amount of discharge generated when the predetermined voltage is applied between the member connected to the second terminal and the member electrically connected to the second terminal.

It should be noted that the first hook cylinder 130 and the second hook cylinder 140 correspond to the hook moving portion when describing the correspondence relationship between the configuration in the above embodiment and the configuration in the scope of claims. Also, the insulating member moving mechanism 170 corresponds to the insulating member insertion portion, and the pusher cylinder 150 corresponds to the pusher moving portion.

1 Insulation Inspection Device 2 Stator Core 3 Power Supply Unit 4 Switching Unit 5 Discharge Amount Measuring Unit 7 Control Unit 20 Slots 21 to 23 Wire 130 First Hook Cylinder 140 Second Hook Cylinder 150 Pusher Cylinder 160 Chuck Mechanism 170 Insulating Member Moving Mechanism

Claims (5)

The insulating state of the films of the U-phase, V-phase, and W-phase wire rods (21 to 23) inserted into the slots (20) formed in the cylindrical core (2) of the armature of the rotating electric machine is described as U-phase. An insulation inspection device that inspects a wire rod, a V-phase wire rod, and a W-phase wire rod before they are connected,
a power supply unit (3) having a first terminal (31) and a second terminal (32) and applying a predetermined voltage between the first terminal and the second terminal;
a switching unit (4) for switching between an electrical connection state and a disconnection state of the first terminal and the second terminal with respect to each of the U-phase, V-phase, and W-phase wires;
Locking portions (131, 141) having locking claws for hooking at least two wire rods out of each of the U-phase, V-phase, and W-phase wire rods are provided, and the locking portions are moved to separate the U-phase wire rod and the V-phase wire rod. a hook moving part (130, 140) for separating the phase wire and the W phase wire from each other;
In a state where the U-phase wire, the V-phase wire, and the W-phase wire are separated from each other by the hook moving portion, the U-phase wire is inserted between the U-phase wire, the V-phase wire, and the W-phase wire. an insulating member inserting portion (170) for inserting an insulating member (300) for insulating between the wire, the V-phase wire, and the W-phase wire;
In a state in which the insulating member is inserted between the U-phase wire, the V-phase wire, and the W-phase wire by the insulating member insertion portion, the first one of the U-phase, V-phase, and W-phase wires a discharge amount measurement unit (5) for measuring the discharge amount generated when the predetermined voltage is applied between the member electrically connected to the terminal and the member electrically connected to the second terminal; Insulation inspection device with The pusher moving part (150) according to claim 1, further comprising a pusher moving part (150) for pushing back at least one of the U-phase wire, the V-phase wire, and the W-phase wire separated by the hook moving part to a position before being separated. insulation inspection equipment. The U-phase wire, the V-phase wire, and the W-phase wire are a first wire portion extending in the circumferential direction of the core toward a portion where the U-phase wire, the V-phase wire, and the W-phase wire are connected. (212a, 222a, 232a), and a second wire rod portion (212b, 222b, 232b) that bends from the end of the first wire rod portion and extends in the axial direction of the core,
The second wire portions of the U-phase wire, the V-phase wire, and the W-phase wire are converged,
The hook moving portion moves the engaging portion, in which the engaging claw is hooked to at least one of the first wire rod portions of the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod. 3. The insulation inspection apparatus according to claim 1, wherein the V-phase wire and the W-phase wire are separated from each other. the hook moving part moves the locking part in a direction intersecting with the axial direction of the core to separate the U-phase wire, the V-phase wire, and the W-phase wire from each other;
4. The insulation inspection according to claim 3, wherein the insulating member inserting portion inserts the insulating member between the second wire portions of the U-phase wire, the V-phase wire, and the W-phase wire in the axial direction of the core. Device. The insulating state of the films of the U-phase, V-phase, and W-phase wire rods (21 to 23) inserted into the slots (20) formed in the cylindrical core (2) of the armature of the rotating electric machine is described as U-phase. An insulation inspection method for inspecting a wire rod, a V-phase wire rod, and a W-phase wire rod before they are connected,
preparing a power supply section (3) having a first terminal (31) and a second terminal (32) and applying a predetermined voltage between the first terminal and the second terminal;
preparing a switching unit (4) for switching between an electrical connection state and a disconnection state of the first terminal and the second terminal for each of the U-phase, V-phase, and W-phase wires;
Locking portions (131, 141) having locking claws for hooking at least two wire rods out of each of the U-phase, V-phase, and W-phase wire rods are provided, and the locking portions are moved to separate the U-phase wire rod and the V-phase wire rod. preparing hook moving parts (130, 140) for separating the phase wire and the W phase wire from each other;
instructing the hook moving part to move the locking parts (131, 141) to separate the U-phase wire, the V-phase wire, and the W-phase wire from each other;
With the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod separated from each other, the U-phase wire rod and the V-phase wire rod are placed between the U-phase wire rod, the V-phase wire rod, and the W-phase wire rod. inserting an insulating member (300) for insulation between the wire and the W-phase wire;
The insulating member is inserted between the U-phase wire, the V-phase wire, and the W-phase wire, and electrically connected to the first terminal of each of the U-phase, V-phase, and W-phase wires. and measuring an amount of discharge generated when the predetermined voltage is applied between the member that is electrically connected to the second terminal and the member that is electrically connected to the second terminal.

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