Background technology
Frequency conversion automatic system includes PID controller, DC power supplier, pressure transmitter (or other sensors) and frequency conversionDevice.
If frequency conversion automatic system breaks down in the process of work, the measuring instrument pair using frequency conversion automatic system is neededThe running parameter of frequency conversion automatic system measures, and then automatic to frequency conversion according to the running parameter of frequency conversion system by staffSystem carries out fault diagnosis.In the related technology, the measuring instrument of frequency conversion system is multimeter, in use multimeter to frequency conversion systemIt when running parameter measures, needs to adjust multimeter to DC current measurement pattern, measures pressure transmitter (or other biographiesSensor) arrive controller electric current；Then the DC current on Mersure Controler to inverter current terminal again；Staff's root againAccording to frequency conversion system running parameter to frequency conversion system carry out fault diagnosis when, staff can according to pressure transmitter (or itsIts sensor) to the electric current of controller, judge whether input circuit breaks down；According on controller to inverter current terminalDC current, judge whether frequency converter breaks down.
Due in the related technology, when being measured to the running parameter of frequency conversion automatic system using multimeter, needing workMake personnel gradually to adjust multimeter to DC current measurement pattern, DC voltage measurement pattern, and the 4-20 that sensor providesMilliampere unadjustable, therefore, the step of measuring frequency conversion automatic system running parameter, is cumbersome, and multimeter gear is more, converts shelvesError easy to operate when position measures the less efficient of frequency conversion system running parameter, and existing signal generator cannot also giveDirect current signal measures the DC current in interlock circuit simultaneously.
Utility model content
In order to solve the problems, such as to measure the less efficient of frequency conversion automatic system running parameter, the utility model provides one kindMulti-purpose frequency conversion automatic system tester.The technical solution is as follows：
A kind of tester of multi-purpose frequency conversion system, the frequency conversion automatic system includes current measurement module and signal generatorModule, current measurement module are used in the given value of current terminal series-shunt with frequency converter, measure the direct current of given value of current terminalStream；Signal generator module is connected with the input circuit of PID regulator measured value.
The current measurement module is used for when connecting with the input circuit, is measured arbitrary straight in the input circuitGalvanic electricity stream；
The signal generator module is used for when being connect with the input circuit, is adjusted and is given in the input circuitDC current.
The current measurement module is made of auxiliary circuit and liquid crystal ammeter, and the range of DC ammeter is 50 milliamperes；
The signal generator module is made of auxiliary circuit and liquid crystal ammeter and 4-20 milliamperes of generators.
In conclusion the utility model provides a kind of multi-purpose frequency conversion automatic system tester, signal generator module withThe input circuit of PID regulator measured value connects, and adjusts the DC current in PID input circuits；Current module and frequency converterCurrent terminal connects, the given DC current of Measurement for Inverter speed governing, the problem of not necessarily considering whether total ground, so, it can be withDirectly use running parameter of the multi-purpose frequency conversion automatic system tester that the utility model embodiment provides to frequency conversion automatic systemIt measures and debugs, simplify the step of measuring frequency conversion automatic system running parameter, improve disposition frequency conversion automatic systemEfficiency.
Specific implementation mode
It is new to this practicality below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearerType embodiment is described in further detail.
As shown in Figure 1, the utility model embodiment provides a kind of multi-purpose frequency conversion automatic system tester.The frequency conversion systemTester include：Watchcase 01, current measurement part 02 and signal generator part 03, current measurement part 02 and signal occurDevice part 03 is located inside watchcase 01, and current measurement part 02 includes：Three and half liquid crystal DC ammeters 021, quick aviation are insertedFirst 023 and power switch 022 and auxiliary circuit part；Signal generator part 03 includes signal generator and three liquid crystal watches031, power switch 032, quick aviation plug 033, potentiometer 036 and voltage and current output selector switch 037.
DC ammeter 021 is used to, when inverter current terminal input circuit is connected using quick aviation plug 023, surveyMeasure frequency converter current terminal speed governing DC current；Three liquid crystal watches 031 are used to detect given inverter current terminal or PID is defeatedThe 4-20ma current signals entered, potentiometer 034 are connected for adjusting size of current, quick aviation plug 033 for interlock circuit.There are two jacks for setting at the top of watchcase, which is current measurement jack and 4-20ma (2-10v) jack.
The multi-purpose frequency conversion automatic system tester further includes four p-wires, four wire clamps, two test plugs, the testLine includes：One end of two testing current lines, each p-wire connects two wire clamps, and the other end connects a test plug；ElectricityRespectively connection one two (at prime negative black) wire clamp, the other end connect jack 023, electric current letter for one end of current test line 024 and 025Respectively connection two (at prime negative black) wire clamps, the other end connect jack 033 for one end of number line 034 and 035.
In conclusion in the multi-purpose frequency conversion automatic system tester provided due to the utility model embodiment, the electric currentMeasurement module is used for when connecting with the input circuit, measures the DC current in the input circuit；The signal occursDevice is used for when being connect with the input circuit, and the DC current given in the input circuit is adjusted.So can be directThe multi-purpose frequency conversion automatic system tester provided using the utility model embodiment carries out the running parameter of frequency conversion automatic systemIt measures, simplifies the step of measuring frequency conversion automatic system running parameter, improve the effect for measuring frequency conversion automatic system running parameterRate.
As shown in Fig. 2, a kind of work original of the multi-purpose frequency conversion automatic system tester provided for the utility model embodimentManage schematic diagram.
Mainly be made of two large divisions, current measurement module and signal generator module, current measurement module be used forWhen the given value of current terminal series-shunt of frequency converter, the DC current of given value of current terminal is measured；Signal generator is used to adjust with PIDThe input circuit of device measured value is connected or is connect with inverter current input terminal.It should be noted that signal generator part03 includes signal generating circuit and three liquid crystal watches 031, power switch 032, quick aviation plug 033, potentiometer 036 and electric currentVoltage signal selecting switch 037.
Optionally, 500 Ohmic resistances, which are inscribed, in signal generator part 03 can export 2-10 volt DC voltages,
Specifically, DC ammeter 021 and 031 is liquid crystal ammeter in the utility model embodiment, so this practicality is newAmmeter 021 and 031 in type embodiment can use under the environment (such as night) of dark, i.e. the utility modelThe tester for the frequency conversion system that embodiment provides can use in the environment of dark, and the range of DC ammeter 021 is50 milliamperes；The range of DC ammeter 031 is 50 milliamperes.
Jack there are two being also set up on watchcase 01, respectively：Current measurement jack and 4-20ma (2-10v) output plughole.
The multi-purpose frequency conversion automatic system tester further includes four p-wires, four wire clamps, two test plugs, multipleP-wire includes：One end of two pairs of testing current lines, each pair of p-wire connects two wire clamps, and the other end connects a test and insertsHead.
Testing current line 024 connects a wire clamp (black negative and red just) with 025 one end, and the other end connects a jack023；Respectively connection one (red just black negative) wire clamp, the other end connect aviation jack 033 for one end of current signal line 034 and 035.
As shown in figure 3, when frequency conversion robot control system(RCS) cisco unity malfunction, the utility model embodiment can be used to provideMulti-purpose frequency conversion automatic system tester tests the running parameter of the system, and then carries out failure to the system by staff and examineIt is disconnected.Can the positive and negative wire clamp of this tester signal generator be connected to PID controller measured values respectively first and input 35 and 36 endsSub (by taking Fuji PXR9 as an example), former connecting line is removed；The wire clamp of current measurement module seals in inverter current and gives circuit, alsoIt is to say that 32 terminal lines need to be disconnected, positive wire clamp, which is connected to frequency converter, to be carried out line (former 32# lines) cathode wire clamp and be connected to 32# terminals.
Exemplary, in constant pressure water supply automatic control system, frequency converter not raising speed is provided using the utility model embodimentWhen multi-purpose frequency conversion automatic system tester is tested, if the frequency converter that current measurement is tested is inputted to constant current as 4 millisPeace, Regulate signal generator potential device clockwise, current measurement value do not change, it can be determined that and PID controller is damaged, if there isVariation may be pressure transmitter damage.
In conclusion due in the tester of the frequency conversion automatic system of the utility model embodiment offer, current measurement mouldBlock is used in the given value of current terminal series-shunt with frequency converter, measures the DC current of given value of current terminal；Signal generator mouldBlock is connected with the input circuit of PID regulator measured value..So directly the utility model embodiment can be used to provideThe tester of frequency conversion automatic system is measured and is debugged to the running parameter of frequency conversion system, simplifies test frequency conversion system workThe step of parameter, improves the efficiency of disposition frequency conversion automatic system work.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all in this practicalityWithin novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility modelWithin the scope of shield.