CN201449435U

CN201449435U - Interturn pressure test device

Info

Publication number: CN201449435U
Application number: CN2009200640360U
Authority: CN
Inventors: 李立中; 刘明超
Original assignee: ZHUZHOU ZDTEC ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: ZHUZHOU ZDTEC ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2009-04-10
Filing date: 2009-04-10
Publication date: 2010-05-05
Anticipated expiration: 2019-04-10

Abstract

The utility model relates to an interturn pressure test device, which comprises a high-voltage impulse main circuit, a measuring loop, a protection loop, a control loop, a computer, a displayer and a printer that connected electrically, key points of which lie in that the high-voltage impulse main circuit is composed by connecting a rectification circuit, a discharging circuit and a power supply circuit; an AC of 220V is input into the power supply circuit; an output end of the power supply circuit is connected with the measuring loop; an controlled end of the power supply circuit is connected with the control circuit in the control loop, and is transmitted to the rectification circuit after pressure regulation. The utility model is provided with simple structure, simple and visual operation interface, and measuring proportion of the instrument can be modified and communication and sampling of data acquisition card can by controlled through a programmable controller. Burst length and wavefront can be set according to different tested objects. Interturn insulation breakdown, windings open circuit, discrepancy of turn number, wrong wiring of the winds, error embedded wire, ground breakdown, phase fault, windings DC resistance measuring and insulation measurement etc. can be tested.

Description

The turn-to-turn Withstand test device

Technical field

The utility model relates to a kind of test unit, specifically relates to a kind of turn-to-turn Withstand test device that is applied to equipment such as motor, transformer, electromagnet, electric apparatus coil, air core coil.

Background technology

Equipment such as prior motor, transformer, electromagnet, electric apparatus coil, air core coil all will carry out withstand voltage test to coil before dispatching from the factory.After the equipment general assembly, undertaken this test, in each operation of device fabrication or maintenance, all need test, test operation of living in and operation trial voltage peak value is made by oneself by factory by standard code.The turn-to-turn Withstand test device that is widely used at present motor, electrical equipment both at home and abroad generally adopts the surge waveform relative method.The method applies high-voltage pulse between the head and the tail two ends of coil, thunderbolt ripple that simulated machine, electrical equipment bear in actual motion or operation ripple.Compare the damped oscillation waveform that the surge voltage ripple forms by observing in coil winding, identity coil winding insulation state rapidly, and then differentiate the defective or the fault such as turn-to-turn insulation damage, corona discharge, partial short circuit, wiring error, short circuit, broken string of coil inside rapidly.This device needs the testing crew manual operation, and whether the coincidence of waveform also is artificial judgement, judges not strict and error is bigger; Adopt manually to come the pressure regulator pressure regulation, the Control of Voltage precision is lower, and step-up ratio is big more, and the departure rate of system is high more; Simultaneously, the repetition frequency and the number of high-voltage pulse are non-adjustable, can not fully satisfy client's demand.

Summary of the invention

The purpose of this utility model is the shortcoming that overcomes said structure, provides a kind of turn-to-turn pulse interval adjustable, can carry out pressure regulator automatically and boost, the turn-to-turn Withstand test device that data acquisition, analysis, waveform are relatively judged.

The technical solution of the utility model is: by the high-voltage pulse major loop, measure the loop, protection loop, control loop, computing machine, display, printer are electrically connected to be formed, and it is characterized in that: described high-voltage pulse major loop is connected to form by rectification circuit, discharge circuit and feed circuit, the 220V AC power is input to feed circuit, the output terminal of feed circuit is connected with the measurement loop, and the control circuit in the controlled terminal of feed circuit and the control loop is passed to rectification circuit in succession after pressure regulation;

Described rectified current routing capacitance 2C1, resistance 2R1,2R2, silicon stack 2D1 and 2D2 connect to form; The high-order output voltage of transformer secondary is received the negative electrode of silicon stack 2D1 and the anode of silicon stack 2D2 behind electric capacity 2C1, resistance 2R1, the plus earth of silicon stack 2D1 is received discharge circuit behind the negative electrode connecting resistance 2R2 of silicon stack 2D2;

Described discharge circuit is connected to form by electric capacity 2C2 and 2C3, resistance 2R3,2R4,2R5,2R6, silicon stack 2D3, silicon controlled module 2K1, test specimen; Silicon stack 2D3, resistance 2R3 and silicon controlled module 2K1 form the high voltage switch circuit of moment connection, and electric capacity 2C3, resistance 2R4,2R5,2R6 and test specimen 14 are formed the oscillating discharge loops;

Described control loop is made up of Programmable Logic Controller and control circuit, control circuit is connected with the silicon controlled module 2K1 of discharge circuit and provides pulse signal and major loop moment to turn-off pulse, control loop connects simultaneously measures the loop, by modification and the communication of data collecting card and the control of sampling of Programmable Logic Controller realization to the measurement scale of instrument.

In order to realize this purpose better, described measurement loop is connected to form by measurement instrument and data collecting card, and two contacts of data collecting card are received the two ends of the resistance 2R6 of discharge circuit respectively.

The utility model is compared with existing measuring equipment, simple in structure, operation interface is succinctly directly perceived, the automaticity height. calculate waveform area and phase differential automatically by computing machine, and can the different precision (0.1%-20%) of judging be set according to different situations, avoided the error of artificial judgement turn-to-turn short circuit; The wavefront time in burst length can be provided with voluntarily according to different test specimens. and turn-to-turn insulation be can detect and (turn-to-turn short circuit), alternate/decline of insulation against ground performance, corona discharge, winding open circuit, the difference of the number of turn, winding wrong line, the wrong line of embedding, puncture over the ground, phase fault, winding D.C. resistance measurement, insulation measurement etc. punctured.

Description of drawings

Fig. 1 is the utility model structured flowchart.

Fig. 2 is the utility model circuit theory diagrams.

Circuit theory diagrams when Fig. 3 is the following turn-to-turn withstand voltage test of 10kV.

1 high-voltage pulse major loop among the figure, 2 measure the loop, 3 protection loops, 4 control loops, 5 control circuits; 6 Programmable Logic Controllers, 7 computing machines, 8 displays, 9 printers, 11 feed circuit; 12 rectification circuits, 13 discharge circuits, 14 test specimens, 15 instrument, 16 data collecting cards.

Embodiment:

By high-voltage pulse major loop 1, measure loop 2, protection loop 3, control loop 4, computing machine 7, display 8, printer 9 is electrically connected forms the turn-to-turn Withstand test device, and high-voltage pulse major loop 1 comprises rectification circuit 12, discharge circuit 13 and feed circuit 11.Be input to feed circuit 11 by the 220V AC power, control circuit 5 is received the controlled terminal of feed circuit 11 simultaneously, measures the voltage output end that loop 2 connects feed circuit 11, in real time the measuring voltage output valve.The voltage of feed circuit 11 is given rectification circuit 12 after being transferred to certain value.

Rectification circuit 12 is connected to form by electric capacity 2C1, resistance 2R1 and 2R2, silicon stack 2D1 and 2D2.The high-order output voltage of transformer secondary is received the negative electrode of silicon stack 2D1 and the anode of silicon stack 2D2 behind electric capacity 2C1, resistance 2R1, the plus earth of silicon stack 2D1 is received discharge circuit 13 behind the negative electrode connecting resistance 2R2 of silicon stack 2D2.Discharge circuit 13 is by electric capacity 2C2 and 2C3, resistance 2R3,2R4,2R5,2R6, and silicon stack 2D3, silicon controlled module 2K1, test specimen 14 connect to form.Silicon stack 2D3, resistance 2R3 and silicon controlled module 2K1 form the high voltage switch circuit of moment connection, and electric capacity 2C3, resistance 2R4,2R5,2R6 and test specimen 14 are formed the oscillating discharge loops.Pulsed capacitance 2C2 after 12 chargings of feed circuit 11 and rectification circuit, the anode of a termination silicon stack 2D3, the tie point place of another termination oscillating discharge loop 2C3 and 2R5.When feed circuit 11 output voltages reach certain value after rectification circuit 12 is given pulsed capacitance 2C2 charging, control instantaneous pressure on-off circuit conducting ground connection by control circuit 5, pulsed capacitance 2C2 discharge through the oscillation circuit discharge, forms the waveform of oscillatory extinction.

Control loop 4 is by Programmable Logic Controller 6 control The whole control circuit 5, and the state of control circuit 5 feeds back to Programmable Logic Controller 6 simultaneously, realizes the interlocking of control and state, the security that improves this device.Control circuit 5 provides pulse signal and major loop moment shutoff pulse for the silicon controlled module 2K1 of discharge circuit 13, thereby has controlled the waveform generation time of discharge circuit 13 and the frequency of current supply circuit 11 chargings.Control loop 4 connects simultaneously measures loop 2, by modification and the communication of data collecting card 16 and the control of sampling of Programmable Logic Controller 6 realizations to the measurement scale of instrument 15.Protection loop 3 is connected with control loop 4, and the mode by interlocking realizes the protection to whole high-voltage pulse major loop 1.Programmable Logic Controller 6 is by the communication of data line realization with computing machine 7.

Measuring loop 2 is made up of instrument 15 and data collecting card. and instrument 15 is measured the pressure regulator output voltage and the transformer output voltage of high-voltage pulse major loop 1, be transferred to then in the computing machine 7, by host computer instrument 15 being carried out data monitoring. two contacts of data collecting card 16 are received the two ends of the sampling resistor 2R6 of discharge circuit 13 respectively. and data collecting card 16 is transferred to the waveform that collects on the computing machine 7, the software operation interface of computing machine 7 is come control loop 4 controls by the communication with Programmable Logic Controller 6, carry out analytical calculation to measuring the data of gathering in loop 2 simultaneously, and show test findings and waveforms at display 8 in mode intuitively. also the form of test figure with form stored, printer 9 links to each other with computing machine 7, and the user can transfer historical data at any time and print.

Protection loop 3 is provided with ground connection detections, gate interlock detection, foot-switch, high pressure warning lamp, alarm bell, control urgency and stops etc.Ground connection indicator signal, gate interlock indicator signal and foot-switch status signal are sent in the Programmable Logic Controller 6.

Process of the test: the 220V input ac power, the one tunnel gives computing machine 7 power supplies; High-voltage pulse major loop 1 and control loop 4 are sent in another road.When carrying out the turn-to-turn withstand voltage test, paired pulses energy-storage capacitor charging behind rectification circuit, controllable silicon is subjected to the trigger pulse control conducting of pulsed triggering circuit, forms high-voltage pulse, outputs on the test specimen 14, forms the decay Sasser by oscillating circuit and test specimen 14.The decay Sasser that produces is delivered on the computing machine 7 through attenuator, and compare automatically, calculate, differentiate by 7 pairs of concussions of computing machine waveform, thus the turn-to-turn situation of judgement test specimen 14.

If when carrying out the turn-to-turn withstand voltage test of 10kV following (comprising 10kV), other structures are identical, and high-voltage pulse major loop 1 comprises rectification circuit of being made up of silicon stack 1D1, resistance 1R1, electric capacity 1C1 12 and the discharge circuit 13 that is connected to form by silicon controlled module 1K1, resistance 1R2,1R3,1R4,1R5, electric capacity 1C2 and test specimen 14.Charge to electric capacity 1C1 after the silicon stack 1D1 rectification, electric capacity 1C1 one end ground connection, the anode of other end connecting resistance 1R1 and silicon stack 1D2, the negative electrode of 1D2 connects the input end of silicon controlled module 1K1, the output terminal connecting resistance 1R2 of silicon controlled module 1K1, the high-voltage pulse of the electric capacity 1C1 discharge generation of being controlled by silicon controlled module during test is exported to resistance 1R3,1R4,1R5, electric capacity 1C2 and test specimen 14, forms the decay Sasser, carries out sampled measurements by the two ends of data collecting card 16 connecting resistance 1R5.

Claims

1. a turn-to-turn Withstand test device by high-voltage pulse major loop (1), is measured loop (2), protection loop (3), and control loop (4), computing machine (7), display (8), printer (9) are electrically connected to be formed, and it is characterized in that:

A, described high-voltage pulse major loop (1) are connected to form by rectification circuit (12), discharge circuit (13) and feed circuit (11), feed circuit (11) input termination 220V AC power, output terminal is connected with measurement loop (2), control circuit (5) in the controlled terminal of feed circuit (11) and the control loop (4) is passed to rectification circuit (12) in succession after pressure regulation;

B, described rectification circuit (12) are by electric capacity 2C1, resistance 2R1,2R2, and silicon stack 2D1 and 2D2 connect to form; The high-order output voltage of transformer secondary is received the negative electrode of silicon stack 2D1 and the anode of silicon stack 2D2 behind electric capacity 2C1, resistance 2R1, the plus earth of silicon stack 2D1 is received discharge circuit (13) behind the negative electrode connecting resistance 2R2 of silicon stack 2D2;

C, described discharge circuit (13) are connected to form by electric capacity 2C2 and 2C3, resistance 2R3,2R4,2R5,2R6, silicon stack 2D3, silicon controlled module 2K1, test specimen (14); Silicon stack 2D3, resistance 2R3 and silicon controlled module 2K1 form the high voltage switch circuit of moment connection, and electric capacity 2C3, resistance 2R4,2R5,2R6 and test specimen 14 are formed the oscillating discharge loops;

D, described control loop (4) are made up of Programmable Logic Controller (6) and control circuit (5), control circuit (5) is connected with the silicon controlled module 2K1 of discharge circuit (13) and provides pulse signal and major loop moment to turn-off pulse, control loop (4) connects simultaneously measures loop (2), by modification and the communication of data collecting card (16) and the control of sampling of Programmable Logic Controller (6) realization to the measurement scale of instrument (15).

2. according to the described test unit of claim 1, it is characterized in that: described measurement loop (2) is connected to form by instrument (15) and data collecting card (16), and two contacts of data collecting card (16) connect the two ends of the resistance 2R6 of discharge circuit (13) respectively.