CN102841314A - Temperature rise test method and system for electrically excited synchronous motors - Google Patents
Temperature rise test method and system for electrically excited synchronous motors Download PDFInfo
- Publication number
- CN102841314A CN102841314A CN2012103556138A CN201210355613A CN102841314A CN 102841314 A CN102841314 A CN 102841314A CN 2012103556138 A CN2012103556138 A CN 2012103556138A CN 201210355613 A CN201210355613 A CN 201210355613A CN 102841314 A CN102841314 A CN 102841314A
- Authority
- CN
- China
- Prior art keywords
- voltage
- synchronous motor
- electric excitation
- excitation synchronous
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Control Of Ac Motors In General (AREA)
Abstract
The application provides a temperature rise test method and system for electrically excited synchronous motors. The temperature rise test method comprises the following steps that: a first alternating current power supply supplies alternating current voltage to a stator side of the motor; a direct current power supply supplies direct current voltage; a controller generates an adjustable control signal; a current transformer processes the direct current voltage according to the control signal to obtain pulse excitation voltage and outputs the pulse excitation voltage to a rotor side of the motor; the control signal is adjusted to ensure that an effective value of alternating current flowing to the tested motor is equal to a rated current value of the motor, and then the motor can be subjected to a temperature rise test; and a temperature measurer calculates the temperature rise of the motor. The controller can adjust the output control signal according to the requirement on the type and the like of the tested synchronous motor, and the temperature rise test system can be used for performing the temperature rise test on the different types of electrically excited synchronous motors, and company test motors are not needed, so that the test working efficiency is high, and the cost is low.
Description
Technical field
The application belongs to electric field, relates in particular to a kind of temperature-raising experimental method and system of electric excitation synchronous motor.
Background technology
The temperature rise test of motor is exactly under the service condition of regulation, confirms the test of motor stator winding, iron core and rotor winding temperature rise.The purpose of test is the temperature rise standard compliant regulation whether of inspection motor each effective parts.
At present, the system diagram referring to test shown in Figure 1 comprises: tried motor 001, accompany examination motor 002, temperature measuring unit 003, line power 004 and shaft coupling 005.Power and the working range of accompanying examination motor 002 be all greater than by examination motor 001, and two motors connect through shaft coupling 005 and keep synchronously, and the loss of two motors is supplied with by line power 004, temperature measuring unit 003 with tried motor 001 and linked to each other.In the tested process; Tried motor 002 entry into service synchronously under rated power or name-plate current, voltage and rated speed by examination motor 001 with accompanying; Done the motor operation by examination motor 001; Accompany examination motor 002 to do generator operation, temperature measuring unit 003 is measured by the temperature of examination motor 001 in real time, and the tester confirms by the temperature rise of examination motor 001 according to the temperature that records.
But; Adopt this method to carry out the electric excitation synchronous motor temperature rise test; At every turn an electric excitation synchronous motor being carried out temperature rise test just need be provided with a power and working range and all accompany the examination motor greater than what quilt tried motor; When the electric excitation synchronous motor of different model is carried out temperature rise test, the corresponding examination motor of accompanying need be set respectively, what need to prepare accompanies the examination motor more; And do not have special test with device or system, make that the flexibility ratio of carrying out the electric excitation synchronous motor temperature rise test is lower, cost is high.
Summary of the invention
In view of this, the application's purpose is to provide a kind of temperature-raising experimental method and system of electric excitation synchronous motor, can be respectively the electric excitation synchronous motor of different model be carried out temperature rise test, and the pilot system usable range is wide, practices thrift cost.
Be the application of temperature-raising experimental method in reality is implemented that guarantees a kind of electric excitation synchronous motor that the application provides, the temperature rise test system of a kind of electric excitation synchronous motor that the application also provides.
A kind of temperature-raising experimental method of electric excitation synchronous motor comprises:
Export first alternating voltage that generates the stator side of said electric excitation synchronous motor to, the ratings of said first alternating voltage and said electric excitation synchronous motor is complementary;
Generate the DC voltage of preset value;
Generate adjustable control signal;
According to said control signal said DC voltage is converted to field voltage, and said field voltage is outputed to the rotor-side of said electric excitation synchronous motor;
Measure the temperature of said electric excitation synchronous motor, and the temperature rise of the said electric excitation synchronous motor of the said temperature computation of foundation.
Above-mentioned temperature-raising experimental method, preferred, the adjustable control signal of said generation comprises:
Generate sine wave signal, the frequency of said sine wave signal and amplitude can be regulated respectively;
Said sine wave signal and field voltage set-point superposeed obtain first signal;
Generate triangular signal;
Said first signal and said triangular signal subtracted each other obtain secondary signal;
Generate control signal according to said secondary signal and preset modulation condition.
Above-mentioned temperature-raising experimental method, preferred, the said rotor-side that said field voltage is outputed to said electric excitation synchronous motor comprises:
Filtering condition according to preset carries out filtering to said field voltage, obtains glitch-free field voltage;
Said glitch-free field voltage is outputed to the rotor-side of said electric excitation synchronous motor.
Above-mentioned temperature-raising experimental method, preferred, the DC voltage of said generation preset value comprises:
Generate second alternating voltage;
Said second alternating voltage is converted into the DC voltage of preset value.
A kind of temperature rise test system of electric excitation synchronous motor comprises:
First AC power, the stator side that is used to electric excitation synchronous motor provides alternating voltage;
Direct supply is used to generate the DC voltage of preset value;
Controller is used to generate adjustable control signal;
Current transformer is used for according to said control signal said DC voltage being converted to field voltage, and said field voltage is outputed to the rotor-side of said electric excitation synchronous motor;
Thermal detector is used to measure the temperature of said electric excitation synchronous motor, and according to the temperature rise of the said electric excitation synchronous motor of said temperature computation.
Above-mentioned temperature rise test system, preferred, said controller comprises:
Sine-wave generator is used to generate sine wave signal, and the frequency of said sine wave signal and amplitude can be regulated respectively;
First superimposer, being used for said sine wave signal and field voltage set-point superposeed obtains first signal;
Triangular-wave generator is used to generate triangular signal;
Second superimposer is used for said first signal and said triangular signal subtracted each other and obtains secondary signal;
Control-signals generator is used for generating control signal and exporting said current transformer to according to said secondary signal and preset modulation condition.
Above-mentioned temperature rise test system, preferred, also comprise:
Wave filter is used for according to preset filtering condition said field voltage being carried out filtering, obtains glitch-free field voltage.
Above-mentioned temperature rise test system, preferred, said direct supply comprises:
Second AC power is used to provide second alternating voltage;
Converter is used for said second alternating voltage is converted into the DC voltage of preset value.
The temperature-raising experimental method of a kind of electric excitation synchronous motor that the application provides and system comprise: first AC power provides alternating voltage for the stator side of this motor; Direct supply provides the DC voltage of preset value; Controller generates adjustable control signal; Current transformer is converted to field voltage according to control signal to this DC voltage; And field voltage outputed to the rotor-side of this motor; This field voltage is a pulsating volage; Can make by the examination motor and between motor and generator state, change, make the load current value equivalence that flows to by the effective value of the alternating current of examination motor and motor; Initial temperature when thermal detector is measured this motor and do not started, and the real time temperature behind this electric motor starting measured is when real time temperature satisfies when pre-conditioned, according to the temperature rise of initial temperature with this motor of real time temperature calculating.Controller can be regulated the control signal of exporting according to the requirements such as model of tested synchronous motor; The system that uses this electric excitation synchronous motor temperature rise test just can be respectively makes an experiment to the electric excitation synchronous motor of different ratings; The usable range of test method is wide, and need not use and accompany the examination motor, and the testing crew working strength is reduced; Experiment work efficient improves, and cost is lower.
Description of drawings
In order to be illustrated more clearly in the application embodiment or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below is some embodiment of the application, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is in the prior art, electric excitation synchronous motor is carried out the system diagram of temperature rise test;
Fig. 2 is the process flow diagram of the temperature-raising experimental method embodiment 1 of a kind of electric excitation synchronous motor of providing among the application;
Fig. 3 is the particular flow sheet of the temperature-raising experimental method embodiment 1 of a kind of electric excitation synchronous motor of providing among the application;
Fig. 4 is the pwm signal oscillogram of the temperature rise test system embodiment 1 of a kind of electric excitation synchronous motor of providing among the application;
Fig. 5 is the another kind of process flow diagram of the temperature-raising experimental method embodiment 1 of a kind of electric excitation synchronous motor of providing among the application;
Fig. 6 is the process flow diagram of the temperature-raising experimental method embodiment 2 of a kind of electric excitation synchronous motor of providing among the application;
Fig. 7 is the structural representation of the temperature rise test system embodiment 1 of a kind of electric excitation synchronous motor of providing among the application;
Fig. 8 is a concrete structure synoptic diagram of the temperature rise test system embodiment 1 of a kind of electric excitation synchronous motor of providing among the application;
Fig. 9 is the another kind of structural representation of the temperature rise test system embodiment 1 of a kind of electric excitation synchronous motor of providing among the application;
Figure 10 is the electrical block diagram that temperature rise test system embodiment 1 current transformer 104 and the wave filter 106 of a kind of electric excitation synchronous motor of providing among the application formed;
Figure 11 is the another kind of electrical block diagram that temperature rise test system embodiment 1 current transformer 104 and the wave filter 106 of a kind of electric excitation synchronous motor of providing among the application formed;
Figure 12 is the structural representation of the temperature rise test system embodiment 2 of a kind of electric excitation synchronous motor of providing among the application.
Embodiment
For the purpose, technical scheme and the advantage that make the application embodiment clearer; To combine the accompanying drawing among the application embodiment below; Technical scheme among the application embodiment is carried out clear, intactly description; Obviously, described embodiment is the application's part embodiment, rather than whole embodiment.Based on the embodiment among the application, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the application's protection.
The process flow diagram of the temperature-raising experimental method embodiment 1 of a kind of electric excitation synchronous motor that provides referring to the application shown in Fig. 2 comprises:
Step S101: first alternating voltage that will generate exports the stator side of said electric excitation synchronous motor to;
The alternating voltage that said first AC power provides and the ratings of said electric excitation synchronous motor are complementary; Promptly the ratings of the amplitude of first alternating voltage, frequency and this synchronous motor is corresponding; Be the industrial alternating current of 380V generally speaking; In the practical implementation, the size of first alternating voltage also can change according to the ratings of underproof electric excitation synchronous motor accordingly.
Step S102: the DC voltage that generates preset value;
Model and test according to underproof electric excitation synchronous motor are provided with conditions such as content, and direct supply generates the DC voltage of preset value.
Step S103: generate adjustable control signal;
Controller can generate adjustable control signal, and this control signal can change the size of the field voltage that is added to rotor-side.
Referring to the particular flow sheet shown in Fig. 3, step S103 comprises:
Step S1031: generate sine wave signal;
Regulate the amplitude A of sine wave signal, i.e. the voltage swing of the underproof electric excitation synchronous motor rotor-side of scalable; Change the frequency f of sine wave signal; Just can change the frequency of the voltage of underproof electric excitation synchronous motor rotor-side; The voltage of rotor-side changes, and can cause magnetic field to change, and the back-emf of motor also changes; The stator side voltage of motor also can change, and then can change the size of stator side electric current.
Amplitude A and frequency f according to the size of the rated current of underproof electric excitation synchronous motor etc. is regulated the sine wave signal that generates make underproof electric excitation synchronous motor stator side current effective value equal the electric excitation synchronous motor load current value.
Step S1032: said sine wave signal and field voltage set-point superposeed obtains first signal;
The field voltage set-point is corresponding with the rated excitation voltage of electric excitation synchronous motor rotor-side.
Step S1033: generate triangular signal;
The frequency of triangular signal is the switching frequency of current transformer.
Execution in step 1033 again behind execution in step S1031 ~ step S1032 in the present embodiment; But be not limited to this; In actual the enforcement, also can first execution in step S1033 execution in step S1031 ~ step S1032 again, or step S1031 ~ step S1032 and step S1033 carry out simultaneously.
Step S1034: said first signal and said triangular signal subtracted each other obtain secondary signal;
Step S1035: generate control signal according to said secondary signal and preset modulation condition.
Under preset modulation condition, convert the secondary signal that generates into control signal.
Referring to the PWM oscillogram of the secondary signal shown in Fig. 4, dutycycle is provided with according to sine wave freuqency, amplitude and triangle wave frequency, amplitude.
Step S104: the said control signal of foundation is handled said DC voltage and is obtained field voltage, and said field voltage is outputed to the rotor-side of said electric excitation synchronous motor;
According to said control signal said DC voltage is handled the pulsating volage that to obtain a frequency be f, and pulsating volage is sent to the rotor-side of underproof electric excitation synchronous motor.Because the effect of machinery inertial; Slight fluctuation only takes place in underproof electric excitation synchronous motor rotating speed; Vibration frequency is f; Because in continuous fluctuation, making, the field voltage of synchronous motor underproof electric excitation synchronous motor transition back and forth between motoring condition and two states of generating state makes the load current value equivalence that flows to by the effective value of the alternating current of examination motor and motor.
Step S105: measure the temperature of said electric excitation synchronous motor, and the temperature rise of the said electric excitation synchronous motor of the said temperature computation of foundation.
When not bringing into operation, measuring the initial temperature of this electric excitation synchronous motor at underproof electric excitation synchronous motor, also is environment temperature.
After electric excitation synchronous motor brought into operation, in operational process, the synchronous motor temperature raise; Measure the temperature of this operating synchronous motor in real time; Point for measuring temperature can be arranged on motor internal, when the temperature of measuring keeps stable and no longer raises in the Preset Time section, satisfies pre-conditioned; Subtract each other said real time temperature and initial temperature this moment, and the difference that obtains promptly is the temperature rise of this underproof electric excitation synchronous motor.
Measure the temperature of underproof electric excitation synchronous motor in the present embodiment in real time; But be not limited to this; In actual the enforcement,, also can be set the thermometric cycle if when thermometric is less demanding; Each thermometric period measurement is the temperature of this electric excitation synchronous motor once, specifically is that thermometric is set according to actual conditions cycle length.
Referring to Fig. 5, show the another kind of process flow diagram of the temperature-raising experimental method embodiment 1 of a kind of electric excitation synchronous motor that the application provides, the step S104 of Fig. 2 specifically comprises in this process flow diagram:
Step S1041: the said control signal of foundation is handled said DC voltage and is obtained field voltage;
According to said pwm control signal said DC voltage is handled the pulsating volage that to obtain a frequency be f, and pulsating volage is sent to the rotor-side of underproof electric excitation synchronous motor.Because the effect of machinery inertial; Slight fluctuation only takes place in underproof electric excitation synchronous motor rotating speed; Vibration frequency is f; Because in continuous fluctuation, making, the field voltage of synchronous motor underproof electric excitation synchronous motor transition back and forth between motoring condition and two states of generating state makes the load current value equivalence that flows to by the effective value of the alternating current of examination motor and motor.
Step S1042: the filtering condition according to preset carries out filtering to said field voltage, obtains glitch-free field voltage;
Owing in generating the sine wave signal process or in the process that generates field voltage, may be interfered, making has undesired signal in the field voltage that produces, and according to preset filtering condition field voltage is carried out filtering, makes in this field voltage noiseless.Stipulated the amplitude of effective field voltage etc. in this filtering condition.
Step S1043: the rotor-side that said glitch-free field voltage is outputed to said electric excitation synchronous motor.
This filtered field voltage is sent to the rotor-side of electric excitation synchronous motor, make in the field voltage of rotor-side of the electric excitation synchronous motor that is input to test noiselessly, make the stable working state of electric excitation synchronous motor.
Execution in step S102 ~ step 104 again behind the execution in step S101 in the present embodiment; But be not limited to this; In actual the enforcement; Also can first execution in step S102 ~ step 104 execution in step S101 again, or step S102 ~ carry out simultaneously with step S101, as long as guarantee the stator side of electric excitation synchronous motor and the voltage signal of rotor-side.
From the above, in present embodiment 1, underproof electric excitation synchronous motor stator side receives and corresponding first alternating voltage of underproof synchronous motor rated voltage; According to control signal said DC voltage is converted to field voltage, and said field voltage is outputed to the rotor-side of said electric excitation synchronous motor; Initial temperature when measuring underproof electric excitation synchronous motor and not starting with start after real time temperature, when said real time temperature satisfies when pre-conditioned, the temperature rise of calculating said electric excitation synchronous motor according to said initial temperature and said real time temperature.Adopt the temperature-raising experimental method of a kind of electric excitation synchronous motor that provides in the present embodiment 1; Can be respectively the electric excitation synchronous motor of different ratings be made an experiment; The usable range of test method is wide, and need not use and accompany the examination motor, and the testing crew working strength is reduced; Experiment work efficient improves, and cost is lower.
Referring to Fig. 6, show in the process flow diagram of temperature-raising experimental method embodiment 2 of a kind of electric excitation synchronous motor that the application provides, this process flow diagram is that the step S102 of Fig. 2 specifically comprises:
Step S1021: generate second alternating voltage;
Because DC voltage also can carry out AC/DC by alternating voltage and be converted to, so available second AC power generates second alternating voltage, converts the required DC voltage of current transformer again into.
Step S1022: the DC voltage that said second alternating voltage is converted into preset value.
Convert this second alternating voltage into DC voltage through AC/DC.
Because power supply commonly used is generally alternating current; Directly produce second alternating voltage; The model of the underproof electric excitation synchronous motors of foundation such as the amplitude of this second alternating voltage and test are provided with conditions such as content and regulate; Convert this alternating voltage into DC voltage through AC/DC (ac/dc) again, this DC voltage is identical with the DC voltage of step S102 generation among the embodiment 1.
From the above, in present embodiment 2, DC voltage is that second alternating voltage is converted to through AC/DC.The temperature-raising experimental method of a kind of electric excitation synchronous motor that the application embodiment provides is the DC voltage that current transformer is required; Can be for the DC voltage that directly provides or the DC voltage that alternating voltage is obtained after through the AC/DC conversion, as long as the voltage of the current transformer that gets into is the DC voltage of preset value.
The temperature-raising experimental method embodiment of a kind of electric excitation synchronous motor that provides with above-mentioned the application is corresponding, and the application also provides a kind of temperature rise test system embodiment of electric excitation synchronous motor.
The structural representation of the temperature rise test system embodiment 1 of a kind of electric excitation synchronous motor that the application who shows referring to Fig. 7 provides, said system comprises: first AC power 101, direct supply 102, controller 103, current transformer 104 and thermal detector 105.
Wherein, first alternating voltage that said first AC power 101 generates, and said first alternating voltage exported to the stator side of said electric excitation synchronous motor;
The ratings of said first alternating voltage and said electric excitation synchronous motor is complementary; Promptly the ratings of the amplitude of first alternating voltage, frequency and this synchronous motor is corresponding; Be the industrial alternating current of 380V generally speaking; In the practical implementation, the size of first alternating voltage also can change according to the ratings of underproof electric excitation synchronous motor accordingly.
Wherein, said direct supply 102 is used to generate the DC voltage of preset value;
Model and test according to underproof electric excitation synchronous motor are provided with conditions such as content, and said direct supply generates the DC voltage of preset value.
Wherein, said controller 103 is used to generate adjustable control signal;
Referring to the concrete structure synoptic diagram shown in Fig. 8, said controller 103 comprises: sine-wave generator 1031, first superimposer 1032, triangular-wave generator 1033, second superimposer 1034 and control-signals generator 1035.
Wherein, said sine-wave generator 1031 is used to generate sine wave signal;
The frequency of said sine wave signal and amplitude can be regulated respectively;
Regulate the amplitude A of sine wave signal, i.e. the voltage swing of the underproof electric excitation synchronous motor rotor-side of scalable; Change the frequency f of sine wave signal; Just can change the frequency of the voltage of underproof electric excitation synchronous motor rotor-side; The voltage of rotor-side changes, and can cause magnetic field to change, and the back-emf of motor also changes; The stator side voltage of motor also can change, and then can change the size of stator side electric current.
Amplitude A and frequency f according to the size of the rated current of underproof electric excitation synchronous motor etc. is regulated the sine wave signal that sine-wave generator 1031 sends make that flowing to underproof electric excitation synchronous motor stator side current effective value equals the electric excitation synchronous motor load current value.
Wherein, said first superimposer 1032 is used for said sine wave signal and the stack of said field voltage set-point are obtained first signal, and this field voltage set-point is corresponding with the rated excitation voltage of electric excitation synchronous motor rotor-side;
Wherein, said triangular-wave generator 1033 is used to generate triangular signal;
The frequency of the triangular signal that triangular-wave generator 1033 generates is the switching frequency of control current transformer 104.
Wherein, the triangular signal of said second superimposer 1,034 first signal that is used for said first superimposer 1032 is generated and 1033 transmissions of said triangular-wave generator subtracts each other and obtains secondary signal;
This secondary signal is PWM (Pulse Width Modulation, pulse-length modulation) signal.
First signal and triangular signal subtract each other the secondary signal that obtains in second superimposer 1034.
Wherein, said control-signals generator 1035 generates control signal and exports said current transformer to according to said secondary signal and preset modulation condition.
According to said control signal said DC voltage is handled the pulsating volage that to obtain a frequency be f, and pulsating volage is sent to the rotor-side of underproof electric excitation synchronous motor.Because the effect of machinery inertial; Slight fluctuation only takes place in underproof electric excitation synchronous motor rotating speed; Vibration frequency is f, because the field voltage of synchronous motor, makes underproof electric excitation synchronous motor transition back and forth between motoring condition and two states of generating state in continuous fluctuation; Make the load current value equivalence that flows to by the effective value of the alternating current of examination motor and motor, make underproof electric excitation synchronous motor need not accompany the examination motor just can accomplish temperature rise test.
Referring to Fig. 4 the PWM oscillogram of secondary signal is shown, dutycycle is provided with according to sine wave freuqency, amplitude and triangle wave frequency, amplitude.
Wherein, said current transformer 104 is used for according to said control signal said DC voltage being converted to field voltage, and said field voltage is outputed to the rotor-side of said electric excitation synchronous motor;
Wherein, said thermal detector 105 is used to measure the temperature of said electric excitation synchronous motor, and the temperature rise of the said electric excitation synchronous motor of the said temperature computation of foundation.
When not bringing into operation, thermal detector 105 is measured the initial temperature of this electric excitation synchronous motor, also is environment temperature at underproof electric excitation synchronous motor.
When electric excitation synchronous motor brings into operation, in operational process, the synchronous motor temperature raises; Thermal detector 105 is measured the temperature of this operating synchronous motor in real time; Point for measuring temperature can be arranged on motor internal, when the temperature of measuring keeps stable and no longer raises in the Preset Time section, satisfies pre-conditioned; Subtract each other said real time temperature and initial temperature this moment, and the difference that obtains promptly is the temperature rise of this underproof electric excitation synchronous motor.
Show another structural representation of the synchronous motor temperature-raising experiment system embodiment 1 of a kind of electric excitation that the application provides referring to Fig. 9, in the structure shown in Fig. 7, also comprise: wave filter 106.
Said wave filter 106 is used for according to preset filtering condition the field voltage that said current transformer 104 obtains being carried out filtering, obtains glitch-free field voltage.
106 pairs of field voltages of wave filter carry out filtering, make in the field voltage of rotor-side of the electric excitation synchronous motor that is input to test noiselessly, make the stable working state of electric excitation synchronous motor.
Shown in the electrical block diagram of forming referring to current transformer shown in Figure 10 104 and wave filter 106, the circuit of current transformer 104 and wave filter 106 compositions is two bridge-type DC circuit mutually.
Said current transformer 104 comprises four controlled power devices; Each controlled power device is by 1 IGBT (Insulated Gate Bipolar Transistor; The ambipolar thyristor of insulation gate pole) and with the diode of said IGBT reverse parallel connection form, four power devices divide two groups, two power device series connection of each group; Group is parallelly connected with group, and its control end links to each other with the control signal output ends of the control-signals generator 1035 of said controller 103; Said wave filter 106 is made up of 2 reactors and 1 capacitor; Reactor is connected with every group of power device of current transformer 104 respectively; Make two groups of power device parallel connections, capacitor is connected in parallel by on the input end of test electric excitation synchronous motor rotor-side field copper.
Shown in the another kind of electrical block diagram of current transformer 104 shown in Figure 11 and wave filter 106, current transformer 104 is a three-phase bridge DC circuit with the circuit that wave filter 106 is formed.
Said current transformer 104 comprises six controlled power devices; Each controlled power device is formed by 1 IGBT with the diode of this IGBT reverse parallel connection; Six power devices divide three groups; Two power device series connection of each group, group is parallelly connected with group, and its control end links to each other with the control signal output ends of the control-signals generator 1035 of said controller 103; Said wave filter 106 is made up of 3 reactors and 1 capacitor; Reactor is connected with every group of power device of current transformer 104 respectively; Make three groups of power device parallel connections, capacitor is connected in parallel by on the input end of test electric excitation synchronous motor rotor-side field copper.
From the above, in present embodiment 1, first AC power provides first alternating voltage to underproof electric excitation synchronous motor stator side, and this first alternating voltage is corresponding with this electric excitation synchronous motor ratings; Direct supply provides DC voltage; Current transformer is converted to field voltage according to the control signal that controller generates with said DC voltage; And said field voltage outputed to the rotor-side of said electric excitation synchronous motor; The field voltage of pulsation can make by the examination motor and between motor and generator state, change, and makes the load current value equivalence that flows to by the effective value of the alternating current of examination motor and motor; Can carry out temperature rise test to motor; Initial temperature when thermal detector is measured underproof electric excitation synchronous motor and do not started with start after real time temperature; When said real time temperature satisfies when pre-conditioned, the temperature rise of calculating said electric excitation synchronous motor according to said initial temperature and said real time temperature.Adopt the temperature rise test system of a kind of electric excitation synchronous motor that provides in the present embodiment 1; Controller can be regulated the control signal of exporting according to the requirements such as model of tested synchronous motor; The system that uses this electric excitation synchronous motor temperature rise test just can be respectively carries out temperature rise test to the electric excitation synchronous motor of different model; Need not accompany the examination motor, experiment work efficient is high, and cost is low.
Show the structural representation of the temperature rise test system embodiment 2 of a kind of electric excitation synchronous motor that the application provides referring to Figure 12, comprise at direct supply 102 described in the structure shown in Fig. 7: second AC power 1021 and converter 1022.
Wherein, said second AC power 1021 is used to generate second alternating voltage;
Wherein, said converter 1022 is used for second alternating voltage that said second AC power 1021 produces is converted into the DC voltage of preset value.
Because power supply commonly used is generally alternating current; Directly adopt and produce second alternating voltage; The model of the underproof electric excitation synchronous motors of foundation such as the amplitude of this second alternating voltage and test are provided with conditions such as content and regulate; Convert this alternating voltage into DC voltage through AC/DC (ac/dc) again, this DC voltage is identical with the DC voltage of direct supply S102 generation among the embodiment 1.
First AC power that in the application embodiment, provides is different with second AC power; But be not limited to this; In actual the enforcement; First AC power and second AC power can be same AC power, and this AC power is that the stator side of underproof electric excitation synchronous motor provides alternating voltage, to current transformer DC voltage are provided through AC/DC conversion back simultaneously.
From the above, in present embodiment 2, DC voltage is obtained through converter by second AC power, and second AC power produces second alternating voltage, and converter converts this second alternating voltage into DC voltage through AC/DC.The temperature-raising experimental method of a kind of electric excitation synchronous motor that the application embodiment provides is the DC voltage that current transformer is required; The DC voltage that DC voltage that can provide for direct direct supply or AC power obtain after through the AC/DC conversion is as long as the voltage of the current transformer that gets into is the DC voltage of preset value.
Each embodiment adopts the mode of going forward one by one to describe in this instructions, and what each embodiment stressed all is and the difference of other embodiment that same or similar part is mutually referring to getting final product between each embodiment.
The above only is the application's a preferred implementation; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the application's principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the application's protection domain.
Claims (8)
1. the temperature-raising experimental method of an electric excitation synchronous motor is characterized in that, comprising:
Export first alternating voltage that generates the stator side of said electric excitation synchronous motor to, the ratings of said first alternating voltage and said electric excitation synchronous motor is complementary;
Generate the DC voltage of preset value;
Generate adjustable control signal;
According to said control signal said DC voltage is converted to field voltage, and said field voltage is outputed to the rotor-side of said electric excitation synchronous motor;
Measure the temperature of said electric excitation synchronous motor, and the temperature rise of the said electric excitation synchronous motor of the said temperature computation of foundation.
2. temperature-raising experimental method according to claim 1 is characterized in that, the adjustable control signal of said generation comprises:
Generate sine wave signal, the frequency of said sine wave signal and amplitude can be regulated respectively;
Said sine wave signal and field voltage set-point superposeed obtain first signal;
Generate triangular signal;
Said first signal and said triangular signal subtracted each other obtain secondary signal;
Generate control signal according to said secondary signal and preset modulation condition.
3. temperature-raising experimental method according to claim 1 is characterized in that, the said rotor-side that said field voltage is outputed to said electric excitation synchronous motor comprises:
Filtering condition according to preset carries out filtering to said field voltage, obtains glitch-free field voltage;
Said glitch-free field voltage is outputed to the rotor-side of said electric excitation synchronous motor.
4. temperature-raising experimental method according to claim 1 is characterized in that, the DC voltage of said generation preset value comprises:
Generate second alternating voltage;
Said second alternating voltage is converted into the DC voltage of preset value.
5. the temperature rise test system of an electric excitation synchronous motor is characterized in that, comprising:
First AC power, the stator side that is used to electric excitation synchronous motor provides alternating voltage;
Direct supply is used to generate the DC voltage of preset value;
Controller is used to generate adjustable control signal;
Current transformer is used for according to said control signal said DC voltage being converted to field voltage, and said field voltage is outputed to the rotor-side of said electric excitation synchronous motor;
Thermal detector is used to measure the temperature of said electric excitation synchronous motor, and according to the temperature rise of the said electric excitation synchronous motor of said temperature computation.
6. temperature rise test according to claim 5 system is characterized in that said controller comprises:
Sine-wave generator is used to generate sine wave signal, and the frequency of said sine wave signal and amplitude can be regulated respectively;
First superimposer, being used for said sine wave signal and field voltage set-point superposeed obtains first signal;
Triangular-wave generator is used to generate triangular signal;
Second superimposer is used for said first signal and said triangular signal subtracted each other and obtains secondary signal;
Control-signals generator is used for generating control signal and exporting said current transformer to according to said secondary signal and preset modulation condition.
7. temperature rise test according to claim 5 system is characterized in that, also comprises:
Wave filter is used for according to preset filtering condition said field voltage being carried out filtering, obtains glitch-free field voltage.
8. temperature rise test according to claim 5 system is characterized in that said direct supply comprises:
Second AC power is used to provide second alternating voltage;
Converter is used for said second alternating voltage is converted into the DC voltage of preset value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103556138A CN102841314A (en) | 2012-09-21 | 2012-09-21 | Temperature rise test method and system for electrically excited synchronous motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103556138A CN102841314A (en) | 2012-09-21 | 2012-09-21 | Temperature rise test method and system for electrically excited synchronous motors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102841314A true CN102841314A (en) | 2012-12-26 |
Family
ID=47368853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103556138A Pending CN102841314A (en) | 2012-09-21 | 2012-09-21 | Temperature rise test method and system for electrically excited synchronous motors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102841314A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344915A (en) * | 2013-06-27 | 2013-10-09 | 深圳市汇川技术股份有限公司 | Synchronous motor temperature rise test system and method |
| CN105116330A (en) * | 2015-09-08 | 2015-12-02 | 哈尔滨工业大学 | Test method of motor under normal-temperature and high-pressure environment |
| CN109030970A (en) * | 2017-06-12 | 2018-12-18 | 中国长城科技集团股份有限公司 | A kind of test method and its system of component temperature rise |
| CN111257751A (en) * | 2020-02-25 | 2020-06-09 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Motor fault diagnosis device, method, apparatus and storage medium |
| CN114076896A (en) * | 2021-11-15 | 2022-02-22 | 株洲尚驰电气有限公司 | Static test method for controlling multipoint loss of permanent magnet synchronous motor by excitation signal |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043000A (en) * | 1988-11-30 | 1990-06-13 | 合肥工业大学 | Asynchronous motor stator double frequency feed negative-phase sequence analog temperature detecting technology |
| CN1818703A (en) * | 2006-03-01 | 2006-08-16 | 株洲变流技术国家工程研究中心 | Motor temperature-raising experimental method and device |
| CN1912645A (en) * | 2006-08-30 | 2007-02-14 | 兰州电机有限责任公司 | Half-voltage stacked frequency thermal test method for asynchronous motor |
| WO2007051936A1 (en) * | 2005-11-04 | 2007-05-10 | Valeo Equipements Electriques Moteur | Measuring a current supplied by a rotating electric machine such as an alternator |
| CN1975451A (en) * | 2006-12-12 | 2007-06-06 | 中国南车集团株洲电力机车研究所 | DC electric machine temperature rise testing method and apparatus |
| CN101281236A (en) * | 2008-05-29 | 2008-10-08 | 株洲南车时代电气股份有限公司 | Dc electric machine temperature test apparatus |
| US8061893B2 (en) * | 2008-12-26 | 2011-11-22 | Foxnum Technology Co., Ltd. | Testing system and method for motor |
| CN102288913A (en) * | 2011-08-12 | 2011-12-21 | 大连华锐股份有限公司 | Testing system for double-fed motor and testing method thereof |
| US20120146683A1 (en) * | 2009-08-28 | 2012-06-14 | Nissan Motor Co., Ltd. Meidensha Corporation | Anomaly detector of permanent magnet synchronous electric motor |
-
2012
- 2012-09-21 CN CN2012103556138A patent/CN102841314A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043000A (en) * | 1988-11-30 | 1990-06-13 | 合肥工业大学 | Asynchronous motor stator double frequency feed negative-phase sequence analog temperature detecting technology |
| WO2007051936A1 (en) * | 2005-11-04 | 2007-05-10 | Valeo Equipements Electriques Moteur | Measuring a current supplied by a rotating electric machine such as an alternator |
| CN1818703A (en) * | 2006-03-01 | 2006-08-16 | 株洲变流技术国家工程研究中心 | Motor temperature-raising experimental method and device |
| CN1912645A (en) * | 2006-08-30 | 2007-02-14 | 兰州电机有限责任公司 | Half-voltage stacked frequency thermal test method for asynchronous motor |
| CN1975451A (en) * | 2006-12-12 | 2007-06-06 | 中国南车集团株洲电力机车研究所 | DC electric machine temperature rise testing method and apparatus |
| CN101281236A (en) * | 2008-05-29 | 2008-10-08 | 株洲南车时代电气股份有限公司 | Dc electric machine temperature test apparatus |
| US8061893B2 (en) * | 2008-12-26 | 2011-11-22 | Foxnum Technology Co., Ltd. | Testing system and method for motor |
| US20120146683A1 (en) * | 2009-08-28 | 2012-06-14 | Nissan Motor Co., Ltd. Meidensha Corporation | Anomaly detector of permanent magnet synchronous electric motor |
| CN102288913A (en) * | 2011-08-12 | 2011-12-21 | 大连华锐股份有限公司 | Testing system for double-fed motor and testing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 赵朝会: "混合励磁同步电机发展现状及应用前景", 《电机与控制学报》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344915A (en) * | 2013-06-27 | 2013-10-09 | 深圳市汇川技术股份有限公司 | Synchronous motor temperature rise test system and method |
| CN103344915B (en) * | 2013-06-27 | 2016-03-16 | 深圳市汇川技术股份有限公司 | synchronous motor temperature rise test system and method |
| CN105116330A (en) * | 2015-09-08 | 2015-12-02 | 哈尔滨工业大学 | Test method of motor under normal-temperature and high-pressure environment |
| CN105116330B (en) * | 2015-09-08 | 2018-01-05 | 哈尔滨工业大学 | The method of testing of motor under a kind of normal temperature high voltage environment |
| CN109030970A (en) * | 2017-06-12 | 2018-12-18 | 中国长城科技集团股份有限公司 | A kind of test method and its system of component temperature rise |
| CN111257751A (en) * | 2020-02-25 | 2020-06-09 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Motor fault diagnosis device, method, apparatus and storage medium |
| CN114076896A (en) * | 2021-11-15 | 2022-02-22 | 株洲尚驰电气有限公司 | Static test method for controlling multipoint loss of permanent magnet synchronous motor by excitation signal |
| CN114076896B (en) * | 2021-11-15 | 2023-08-25 | 株洲尚驰电气有限公司 | Static test method for controlling multipoint loss of permanent magnet synchronous motor by excitation signal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104104247B (en) | Method and apparatus for converting direct current/alternating current power of bridge type | |
| CN203870219U (en) | Motor testbed measurement and control system | |
| Liu et al. | Control design of the brushless doubly-fed machines for stand-alone VSCF ship shaft generator systems | |
| CN102841314A (en) | Temperature rise test method and system for electrically excited synchronous motors | |
| CN104980044A (en) | Power generating device with voltage swell and voltage dip functions | |
| CN109839830A (en) | A kind of the power stage analog control method and device of three phase alternating current motor | |
| CN101825686A (en) | Low-uncertainty stray loss test system of motor | |
| CN106199428B (en) | High-voltage high-power double-fed wind driven generator test system and measurement and control system thereof | |
| CN104064083B (en) | A kind of electrical network analog control system | |
| CN102798819A (en) | High-voltage motor type test system | |
| CN105226610A (en) | A kind of Transformer Close magnetizing inrush current arrester | |
| CN100595597C (en) | Lightning arrester various waveform aging test device | |
| CN211905608U (en) | Dynamic die test device for static variable frequency starting system of gas turbine generator | |
| CN205039524U (en) | Transformer combined floodgate excitation surge current annihilator | |
| CN105134506B (en) | A kind of performance test emulation platform of double-feedback aerogenerator group frequency-variable controller | |
| CN101281236B (en) | Dc electric machine temperature test apparatus | |
| Chenchevoi et al. | Research on harmonic composition of voltage and current of induction generator with high saturation magnetic system | |
| CN111273172A (en) | Dynamic die test device and method for static variable frequency starting system of gas turbine generator | |
| CN201489090U (en) | Synchronous motor full-power test device | |
| CN103608993B (en) | Be controlled by the rule of restriction active power of output, comprise the driving-chain of double feedback electric engine and inverter | |
| Zhang et al. | On the phase sequence characteristics of interharmonics | |
| CN102830353A (en) | Full-power test device of direct drive type megawatt permanent magnet synchronous generator | |
| CN204721231U (en) | There is voltage swell and fall the power generator of function temporarily | |
| CN205263208U (en) | Many function test platform | |
| CN205333822U (en) | Synchronous generator model test device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121226 |