CN110275111A - A kind of ultrahigh speed alternating current generator high speed test system and its control method - Google Patents
A kind of ultrahigh speed alternating current generator high speed test system and its control method Download PDFInfo
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- CN110275111A CN110275111A CN201910631282.8A CN201910631282A CN110275111A CN 110275111 A CN110275111 A CN 110275111A CN 201910631282 A CN201910631282 A CN 201910631282A CN 110275111 A CN110275111 A CN 110275111A
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- 238000004364 calculation method Methods 0.000 claims description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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Abstract
A kind of ultrahigh speed alternating current generator high speed test system and its control method provided by the invention, including air compressor, punching press turbine, one-way throttle valve, oscillograph, single-chip microcontroller, the punching press turbine connect driving rotor rotation with high-speed power generation machine rotor, oscillograph tests out the frequency of generator unit stator voltage and is scaled generator amature revolving speed, rotor speed signal is finally fed back into single-chip microcontroller and is compared with desired revolving speed, single-phase throttle valve is adjusted according to comparison result.This Control system architecture is simple, cost is relatively low and high degree of automation, and control method through the invention can make testing stand revolving speed be relatively easy to and accurately reach desired revolving speed.
Description
Technical field
The present invention relates to a kind of ultrahigh speed alternating current generator high speed test system and its control methods.
Background technique
Electron-amplifier and simulation computer before aircraft, automobile and the telephonic communication to halfth century before a century；From two
The satellite missile and digital computer of radar and cannon air defense network during war to Cold War period；From the mooncraft in the sixties
To modern space shuttle, universe and celestial body detecting device, these famous mankind's scientific and technological inventions directly expedite the emergence of and have developed automatic
Control technology.Derived from practicing, serving practice, distil in practice.By refinement in 1,100, especially nearly half a century work
The practice of industry it is commonly used, automatic control technology have become the mankind science and technology civilization important component.With novel system
Make the rise of industry and the progress of the network information technology, the development and application of automatic control technology will will enter one it is completely new when
Generation.
Equally, automatic control technology also being applied in high-speed engine testing stand gradually, realizes that punching press turbine directly drives
Ultrahigh speed alternating current generator (hereinafter referred to as motor) is moved to reach industrial intelligent standard.The nominal speed range of motor
90000r/min~125000r/min, motor output performance meet: output line voltage virtual value 0~54V sinusoidal ac, volume
Determine motor voltage between phases imbalance under state and is not more than 1V；Motor rated power is not less than 800W, and motor exports three-phase electricity through electricity
After source converter is rectified into 28.5V, output-current rating 23A, instantaneous output current 33A (are not more than 1s)；Steady-state characteristic: motor
Direct current average voltage 28.5 ± 1V of range is exported through supply convertor, ripple amplitude value is not more than 1V；Transient response: impact is prominent
When unloading load, meet the requirement of " GJB181B-2012 " Figure 12 direct current system normal voltage transition envelope.The motor has body
The feature that product is small, revolving speed is high, power density is big.Motor is specified in the range of speeds in engine, is produced electricl energy through power conversion
It is power supply for electrical equipment on engine and bullet after device rectifying and voltage-stabilizing.In view of the specific use of motor, in test to testboard
Precision has higher requirement, and testing stand is mainly used for output performance test of the ultrahigh speed alternating current generator at 13.8 ten thousand turns, energy
The stabilization of revolving speed and torque is kept before the deadline.
The country there is no 140,000 turns of ready-made ultrahigh speed pilot channel generators, and the invention patent is mainly to test bench control system
Method is designed.Existing control method the main problems are as follows: 1, control mode is complicated, increases staff behaviour
Make difficulty；2, the precision of control mode is lower, causes electromechanical testing structure to deviate practical；3, not yet in view of manufacture control circuit
Cost is unsatisfactory for cost-effectiveness requirement；4, the intelligence for not yet realizing control circuit, when a signal is received mainly by manually being grasped
Make, the degree of automation is lower.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of ultrahigh speed alternating current generator high speed test system and its controls
Method processed.
The present invention is achieved by the following technical programs.
A kind of ultrahigh speed alternating current generator high speed test system and its control method provided by the invention, including air compression
Machine, punching press turbine, one-way throttle valve, oscillograph, single-chip microcontroller, the punching press turbine connect driving rotor with high-speed power generation machine rotor
Rotation, oscillograph test out the frequency of generator unit stator voltage and are scaled generator amature revolving speed, finally believe rotor speed
It number feeds back to single-chip microcontroller and is compared with desired revolving speed, single-phase throttle valve is adjusted according to comparison result.
Flowmeter and pressure gauge are also equipped on the punching press turbine inflow pipeline.
The single-chip microcontroller model STC89C51RC-DIP.
The pressure gage measuring range is 0~1.6MPa.
The flowmeter range is 0~50L/min.
6, a kind of control method of ultrahigh speed alternating current generator testboard, comprising the following steps:
A, start, air compressor machine is rotated to punching press turbine input compressed air-driven generator amature；
B, single-chip microcontroller issues instruction and adjusts throttle switch；
C, oscilloscope measurement generator unit stator frequency；
D, stator frequency is converted to revolving speed N by single-chip microcontroller, and is surveyed according to rotary speed precision ε adjusting or fixed restrictive valve
Examination；
E, after test period t, rotary speed precision is reaffirmed.
Stator frequency is converted to the calculation formula of revolving speed by single-chip microcontroller in the step d are as follows:
N (t)=60f (t)/p
In formula, f (t) is the frequency of t moment motor, and p is the number of pole-pairs of motor.
The step d single-chip microcontroller calculates rotary speed precision ε are as follows:
ε=[N (t)-N]/N
In formula, E (t) is the revolving speed of t moment motor, and N is desired revolving speed, takes ± 1%.
It is adjusted in the step d or the condition of fixed restrictive valve is whether rotary speed precision ε reaches ± 1%.
The beneficial effects of the present invention are: single-phase throttle valve, flowmeter, pressure gauge are filled on high pressure gas pipeline road so as to sky
Throughput is monitored in real time and is controlled, and high pressure gas drives turbocharger to make high speed rotation, while being connected directly between pressurization
Generator amature on device turbine makees high speed rotation, tests out the frequency of generator unit stator voltage and is scaled generator amature turn
Rotor speed signal is finally fed back to single-chip microcontroller and is compared with desired revolving speed, according to comparison result to single-phase throttling by speed
Valve is adjusted, and is finally reached desired revolving speed.The Control system architecture is simple, cost is relatively low and high degree of automation, passes through
Control method of the invention can make testing stand revolving speed be relatively easy to and accurately reach desired revolving speed.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is control flow chart of the invention；
Specific embodiment
Be described further below technical solution of the present invention, but claimed range be not limited to it is described.
A kind of ultrahigh speed alternating current generator high speed test system and its control method, including air compressor, punching press turbine,
One-way throttle valve, oscillograph, single-chip microcontroller, the punching press turbine connect driving rotor rotation, oscillograph with high-speed power generation machine rotor
It tests out the frequency of generator unit stator voltage and is scaled generator amature revolving speed, rotor speed signal is finally fed back into monolithic
Machine is simultaneously compared with desired revolving speed, and single-phase throttle valve is adjusted according to comparison result.
Flowmeter and pressure gauge are also equipped on the punching press turbine inflow pipeline.
The single-chip microcontroller model STC89C51RC-DIP.
The pressure gage measuring range is 0~1.6MPa.
The flowmeter range is 0~50L/min.
A kind of control method of ultrahigh speed alternating current generator testboard, comprising the following steps:
A, start, air compressor machine is rotated to punching press turbine input compressed air-driven generator amature；
B, single-chip microcontroller issues instruction and adjusts throttle switch；
C, oscilloscope measurement generator unit stator frequency；
D, stator frequency is converted to revolving speed N by single-chip microcontroller, and is surveyed according to rotary speed precision ε adjusting or fixed restrictive valve
Examination；
E, after test period t, rotary speed precision is reaffirmed.
Stator frequency is converted to the calculation formula of revolving speed by single-chip microcontroller in the step d are as follows:
N (t)=60f (t)/p
In formula, f (t) is the frequency of t moment motor, and p is the number of pole-pairs of motor.
The step d single-chip microcontroller calculates rotary speed precision ε are as follows:
ε=[N (t)-N]/N
In formula, E (t) is the revolving speed of t moment motor, and N is desired revolving speed, takes ± 1%.
It is adjusted in the step d or the condition of fixed restrictive valve is whether rotary speed precision ε reaches ± 1%.
A kind of control method for ultrahigh speed alternating current generator high speed test platform provided by the invention is guaranteeing control essence
Under the premise of degree, the intelligence of high-speed motor testing stand revolving speed control is realized.Its cardinal principle is: being established based on feedback principle automatic
Control system by comparing the deviation between system output and desired output, and reduces deviation to obtain anticipated output.Specific table
It is existing are as follows: air compressor is stored in air accumulator after compressing air first, and the pressure-air in air accumulator passes through pipeline
Punching press turbine is given, fills single-phase throttle valve, flowmeter, pressure gauge on high pressure gas pipeline road to be supervised in real time to air mass flow
Control and control, high pressure gas drives turbocharger to make high speed rotation, while being connected directly between the generator on booster turbine
Rotor makees high speed rotation, tests out the frequency of generator unit stator voltage and is scaled generator amature revolving speed, finally turns rotor
Fast signal feeds back to single-chip microcontroller and is compared with desired revolving speed, single-phase throttle valve is adjusted according to comparison result, finally
Reach desired revolving speed.The Control system architecture is simple, cost is relatively low and high degree of automation, control method through the invention
Testing stand revolving speed can be made to be relatively easy to and accurately reach desired revolving speed, realize the intelligence of test bench control system.Together
The mentioned control method of Shi Benwen provides certain theory support for the control of high-speed motor experimental bench system, also controls to testing stand
System design provides new thinking.
Air compressor is stored in air accumulator after compressing air first, by pressure-air by pipeline to punching press
Turbine, equipped with single-phase throttle valve, flowmeter, pressure gauge to be monitored in real time and to be controlled to air mass flow on the pipeline, so
High pressure gas drives turbocharger to make high speed rotation afterwards, while being connected directly between the generator on the turbine of turbocharger and turning
Son makees high speed rotation, tests out the frequency of generator unit stator voltage and is scaled generator amature revolving speed, finally by rotor speed
Signal feeds back to single-chip microcontroller and is compared with desired revolving speed, is adjusted according to comparison result to single-phase throttle valve, is finally reached
To specified revolving speed.
The selection of control system mainly has an opened loop control and closed-loop control two ways, opened loop control namely without feedback information
System control mode work as operator's activation system, after feeding them into operating status, system is disposably defeated by the instruction of operator
To controll plant, and further cannot be controlled.Closed-loop control can feed back the result of control compared with desired value,
And according to the system of error transfer factor control action.In view of required precision, the present invention uses closed-loop control system, controls precision
Mathematical model are as follows:
ε=[N (t)-N]/N
In formula, E (t) is the revolving speed of t moment motor, and N is desired revolving speed (being in the present invention 140,000 turns), and ε is that user can
With the precision (taking 1% in the present invention, precision size can also be modified according to the actual situation) of receiving.
Oscillograph output valve is electric machine frequency, and the mathematical relationship between revolving speed N and frequency f is as follows:
N (t)=60f (t)/p
In formula, f (t) is the frequency of t moment motor, and p is the number of pole-pairs of motor.
According to design requirement, control loop scheme can be determined substantially, control loop is mainly by pressure gauge and flowmeter, punching
Press the composition such as turbine, ultrahigh speed alternating current generator, oscillograph and singlechip microcontroller, servo motor.
The selection of testing stand control loop main components.The selection of component, which directly influences, in control loop leads to circuit
Precision, manufacturing cost, staff's operation are difficult to degree, analyze below following main components.
Pressure gauge and flowmeter.Pressure gauge is for detecting air pressure in pipeline, the pressure gauge of 0~1.6MPa of selected range
?.Flowmeter need to have wide range, anticyclonic requirement, range is 0~50L/min for detecting air mass flow in pipeline
Flowmeter.
Punching press turbine.Turbine apparatus of the turbine of device as testboard system is increased using vehicle turbine, to the whirlpool of purchase
Booster dismantling is taken turns, the installation dimension of turbine is mapped out, designs corresponding adapter and be connected on generator output shaft.Turbine
Booster has single channel air inlet and multichannel air inlet two types, and final gas push turbine makees high-speed cruising.General turbine increases
Depressor working speed goes to 160,000 turns for 120,000, with its working speed when gas flow, the pressure increase for entering turbine interior
It will rise.Due to not investigating specific turbine characteristic and interface, turbocharger can be bought in store from network, according to inner
Face turbine, volute size redesign structure, by turbine and newly-designed volute on testing stand.
Test motor.Ultrahigh speed alternating current generator (hereinafter referred to as motor) is proposed by certain and my company is entrusted to develop, and is had
Have the characteristics that small in size, revolving speed is high, power density is big；Motor is specified in the range of speeds in engine, is produced electricl energy through power supply
It is power supply for electrical equipment on engine and bullet after converter rectifying and voltage-stabilizing.Its nominal speed range 90000r/min~
125000r/min；Generator working principle: when external force dragging motor rotor, which rotates, generates rotating excitation field, feel in stator winding
AC electromotive force should be generated, thus output voltage.
Oscillograph and singlechip microcontroller (single-chip microcontroller).Oscillograph is a kind of electronic gauge that purposes is very extensive
Device can observe the wavy curve that unlike signal amplitude changes over time using oscillograph, use it to the frequency of detection stator voltage,
Requirement can reach using general research and development type oscillograph；Single-chip microcontroller is a kind of IC chip, using ultra-large integrated electricity
Road technique is integrated into central processor CPU, random access memory ram etc. with data-handling capacity to be constituted on one piece of silicon wafer
The single-chip microcontroller of similar STC89C51RC-DIP class can be used in one small and perfect microcomputer system.
Servo motor.Refer to the engine for controlling mechanical organ operating in servo-system, is that a kind of subsidy motor is indirect
Speed change gear, general general Miniature servo-motors are able to satisfy requirement.
Connect control loop.Each electric elements in correct selection principle route, and component directoryof is formulated, according to
Control loop is connected according to the overall structure figure of control system.
Claims (9)
1. a kind of ultrahigh speed alternating current generator high speed test system, it is characterised in that: including air compressor, punching press turbine, list
To throttle valve, oscillograph, single-chip microcontroller, the punching press turbine connect driving rotor rotation with high-speed power generation machine rotor, and oscillograph is surveyed
It tries out the frequency of generator unit stator voltage and is scaled generator amature revolving speed, rotor speed signal is finally fed back into single-chip microcontroller
And be compared with desired revolving speed, single-phase throttle valve is adjusted according to comparison result.
2. ultrahigh speed alternating current generator high speed test system as described in claim 1, it is characterised in that: the punching press turbine into
Flowmeter and pressure gauge are also equipped in feed channel.
3. ultrahigh speed alternating current generator high speed test system as described in claim 1, it is characterised in that: the single-chip microcontroller model
For STC89C51RC-DIP.
4. ultrahigh speed alternating current generator high speed test system as claimed in claim 2, it is characterised in that: the pressure gage measuring range
For 0~1.6MPa.
5. ultrahigh speed alternating current generator high speed test system as claimed in claim 2, it is characterised in that: the flowmeter range
For 0~50L/min.
6. a kind of control method of ultrahigh speed alternating current generator testboard, comprising the following steps:
A, start, air compressor machine is rotated to punching press turbine input compressed air-driven generator amature；
B, single-chip microcontroller issues instruction and adjusts throttle switch；
C, oscilloscope measurement generator unit stator frequency；
D, stator frequency is converted to revolving speed N by single-chip microcontroller, and is tested according to rotary speed precision ε adjusting or fixed restrictive valve；
E, after test period t, rotary speed precision is reaffirmed.
7. ultrahigh speed alternating current generator high speed test system as claimed in claim 6 and its control method, it is characterised in that: institute
State the calculation formula that stator frequency is converted to revolving speed by single-chip microcontroller in step d are as follows:
N (t)=60f (t)/p
In formula, f (t) is the frequency of t moment motor, and p is the number of pole-pairs of motor.
8. ultrahigh speed alternating current generator high speed test system as claimed in claim 6 and its control method, it is characterised in that: institute
It states step d single-chip microcontroller and calculates rotary speed precision ε are as follows:
ε=[N (t)-N]/N
In formula, E (t) is the revolving speed of t moment motor, and N is desired revolving speed, and ε rotary speed precision takes ± 1%.
9. ultrahigh speed alternating current generator high speed test system as claimed in claim 6 and its control method, it is characterised in that: institute
It states the condition of adjusting or fixed restrictive valve in step d and is whether rotary speed precision ε reaches ± 1%.
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Cited By (1)
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| Publication number | Publication date |
|---|---|
| CN110275111B (en) | 2024-03-19 |
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