CN104808148B - A kind of method of testing of multiphase multiple-unit magneto temperature rise - Google Patents
A kind of method of testing of multiphase multiple-unit magneto temperature rise Download PDFInfo
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Abstract
A kind of method of testing of multiphase multiple-unit magneto temperature rise, the invention belongs to the technical field of electromechanical testing.It is to solve to test at present during permagnetic synchronous motor temperature rise, it is necessary to the problem of additional test equipment and motor long-play consumed energy.Its method and step is：One unit of tested motor is used for generator operation；Another unit of tested motor is used for electric operation, measurement three-phase windings current waveform, phase resistance magnitude of voltage and power angle；All units are complete as electrodynamic element access circuit, and direct-axis voltage and quadrature-axis voltage added by controling winding make its ac-dc axis electric current meet the constraints of test, measure the temperature rise curve of now motor；Change generator unit terminate into load, draw the temperature rise curve under the different rotating speeds of multiple-unit motor, different loads.The present invention makes a unit motor powered operation, another unit electric power generation operation, so as to obtain the current parameters and power output of motor under load condition.
Description
Technical field
The present invention relates to a kind of method of testing of multiphase multiple-unit AC magnetoelectric machine temperature rise, belong to the technology of electromechanical testing
Field.
Background technology
At present, the method for testing for permagnetic synchronous motor temperature rise mainly has thermometer method, electric-resistivity method and thermometry meter method three
Kind.The surface temperature for the generally motor that thermometer method is tested, what electric-resistivity method was tested is the mean temperature of winding, thermometry meter method
Test is then that temperature element is embedded into the internal temperature that motor internal carrys out testing of electric motors.
But, the method for testing of these three temperature rises is required for making motor long-time loaded work piece, motor temperature rise is reached surely
Determine state to complete temperature rise test.This requires to need to make motor external load equipment in temperature rise test process, virtually improves
Condition required for test.Being additionally, since the change of temperature needs certain time, makes motor reach stable temperature rise with greater need for big
The amount time, motor is required for carrying out under a load during this, causes the waste of energy.
The content of the invention
It is current in order to solve it is an object of the invention to provide a kind of method of testing of multiphase multiple-unit magneto temperature rise
, it is necessary to the problem of additional test equipment and motor long-play consumed energy when testing permagnetic synchronous motor temperature rise.
Described purpose is realized by following scheme：A kind of test of described multiphase multiple-unit magneto temperature rise
Method, its method and step is：
Step one：By a unit of tested motor be used for generator operation, and by this unit side access load resistance or
Power network is loaded, during access load power network, control driver is first turned off；
Step 2：Another unit of tested motor is used for electric operation, and this unit is accessed into driver, then
Control driver brings into operation, test motor speed now, three-phase windings current waveform and phase resistance magnitude of voltage, and from control
The power angle under this state is read in device；
Step 3：Control driver that motor is out of service, be then turned off the load of the unit for generating, then distinguish
All be passed through in the three-phase windings of electrodynamic element with current effective value identical DC current under running status in step 2, and survey
Its winding terminal voltage is tried, the winding resistance under this state is obtained；
Step 4：Three-phase windings current waveform is arranged, the direct current constant component I for trying to achieve q shaft currents is converted through dqq1With d axles
The direct current constant component I of electric currentd1, the alternating current with direct current biasing is passed through in the BC phase windings of electrodynamic element, direct current is inclined
The q shaft current direct current constant components for putting electric current to be tried to achieve；
Step 5：By the motor speed tested out, winding resistance, the ac-dc axis inductance of unit motor, power angle, q axles
Electric current stream stationary component brings formula (1), (2) and (5) into, and simultaneous is solved in this load, the next unit electricity of this rotating speed
Electromagnetic power when machine works；The principle of motor electromagnetic torque is calculated according to the parameter of electric machine：During one unit electric operation of motor
The calculating of electromagnetic torque can be expressed as shown in formula (1)：
Te1=KTIq1 (1)
Wherein, KTFor moment coefficient, IqThe direct current constant component of q shaft currents after being converted for dq；According to the coefficient of potential and torque
The derivation and expression formula of coefficient, their relational expression are as follows：
The voltage equation of one unit of multiple-unit permagnetic synchronous motor can be expressed as shape after dq coordinate transforms
Formula：
U1cosδ1=E0+IqRa-IdXd (3)
U1sinδ1=IdRa+IqXq (4)
Wherein, δ1For the power angle of an electrodynamic element, E0For unloaded back-emf, IdThe direct current of d shaft currents after being converted for dq
Stationary component, XdFor d-axis reactance, XqFor quadrature axis reactance；Simultaneous formula (3) and formula (4), can solve the expression formula of q shaft currents
It is as follows：
Wherein, Ld1For direct-axis synchronous inductance, Lq1For quadrature axis synchronous inductance, n is the rotating speed of motor；And by multiple-unit permanent magnetism
The mathematical modeling of synchronous motor can find after being derived, the basic electromagnetic torque of motor only with winding phase current and the list of operation
First number of motors is relevant, and unrelated with the locus of running unit motor；When all units of N unit permagnetic synchronous motors are common
During operation, its basic electromagnetic torque is N times of one unit operation；
Te=NTe1(6)；
Step 6：Generator unit is opened a way, and repeat step two to step 5 draws q shaft current values during empty load of motor, this portion
Electric current is divided to be used for the iron loss and stray loss of balance motor, so not producing output torque；Input power and winding copper loss are calculated,
Draw motor iron loss and stray loss；Because multiple-unit permagnetic synchronous motor is mostly used for low speed occasion, so stator iron loss
Main component is magnetic hystersis loss；So under different rotating speeds, the iron loss relational expression of motor can approximate representation it is as follows：
By the motor iron loss measured by formula (7) and step 6, it can calculate in motor electromagnetic torque and speed curves
The iron loss each put, so as to calculate the power output of motor under this rotating speed by formula (8)：
Pout=Te·n-PFe(n)(8)；
Step 7：When obtaining whole units operations using the relation of a unit output torque and all unit electromagnetic torques
Motor electromagnetic torque, then calculate by electromagnetic torque the electromagnetic power of motor, then subtract the iron loss of motor, obtain motor
Power output, and record winding phase current when motor exports this power；
Step 8：As electrodynamic element circuit is accessed using all units are complete, drive control device is adjusted, added by controling winding
Direct-axis voltage and quadrature-axis voltage, the rotating speed for making motor are the rotating speed in step 2, and test out three-phase windings electric current now, are passed through
Dq conversion draws dq shaft currents I nowq2And Id2, and dq shaft currents now is met following formula：
(Id1)2+(Iq1)2=(Id2)2+(Iq2)2；
Step 9：The temperature rise of now motor is measured, the temperature rise curve of motor is obtained；
Step 10：Change generator unit terminate into load resistance resistance or load power network magnitude of voltage, repeat step
One to step 10, draws the temperature rise curve under the different rotating speeds of multiple-unit motor, different loads.
The present invention has the advantages that compared with the prior art：The present invention is more using multiphase multiple-unit permagnetic synchronous motor
The winding construction feature of unit, makes a unit motor powered operation, a unit electric power generation operation, so as to obtain loading shape
The current parameters and power output of motor under state.Make all unit motor powereds run again, adjust dq shaft currents, simulate whole
The load condition of machine operation, tests out the temperature rise of multiple-unit permagnetic synchronous motor.Needed so as to solve existing method for testing temperature rise
The problem of wanting to waste energy when additional load device and test.
Using in the test process of this method, the casing and shaft extension of motor are without special fixation, it is not required that outside is set
It is standby.With the series of advantages such as simple in construction, performance is stable, data are reliable, general permagnetic synchronous motor temperature can be met
The need for rising test.
Embodiment
Embodiment one：Its method and step is：
Step one：By a unit of tested motor be used for generator operation, and by this unit side access load resistance or
Power network is loaded, during access load power network, control driver is first turned off；
Step 2：Another unit of tested motor is used for electric operation, and this unit is accessed into driver, then
Control driver brings into operation, test motor speed now, three-phase windings current waveform and phase resistance magnitude of voltage, and from control
The power angle under this state is read in device；
Step 3：Control driver that motor is out of service, be then turned off the load of the unit for generating, then distinguish
All be passed through in the three-phase windings of electrodynamic element with current effective value identical DC current under running status in step 2, and survey
Its winding terminal voltage is tried, the winding resistance under this state is obtained；
Step 4：Three-phase windings current waveform is arranged, the direct current constant component I for trying to achieve q shaft currents is converted through dqq1With d axles
The direct current constant component I of electric currentd1, the alternating current with direct current biasing is passed through in the BC phase windings of electrodynamic element, direct current is inclined
The q shaft current direct current constant components for putting electric current to be tried to achieve；
Step 5：By the motor speed tested out, winding resistance, the ac-dc axis inductance of unit motor, power angle, q axles
Electric current stream stationary component brings formula (1), (2) and (5) into, and simultaneous is solved in this load, the next unit electricity of this rotating speed
Electromagnetic power when machine works；The principle of motor electromagnetic torque is calculated according to the parameter of electric machine：During one unit electric operation of motor
The calculating of electromagnetic torque can be expressed as shown in formula (1)：
Te1=KTIq1 (1)
Wherein, KTFor moment coefficient, IqThe direct current constant component of q shaft currents after being converted for dq；According to the coefficient of potential and torque
The derivation and expression formula of coefficient, their relational expression are as follows：
The voltage equation of one unit of multiple-unit permagnetic synchronous motor can be expressed as shape after dq coordinate transforms
Formula：
U1cosδ1=E0+IqRa-IdXd (3)
U1sinδ1=IdRa+IqXq (4)
Wherein, δ1For the power angle of an electrodynamic element, E0For unloaded back-emf, IdThe direct current of d shaft currents after being converted for dq
Stationary component, XdFor d-axis reactance, XqFor quadrature axis reactance；Simultaneous formula (3) and formula (4), can solve the expression formula of q shaft currents
It is as follows：
Wherein, Ld1For direct-axis synchronous inductance, Lq1For quadrature axis synchronous inductance, n is the rotating speed of motor；And by multiple-unit permanent magnetism
The mathematical modeling of synchronous motor can find after being derived, the basic electromagnetic torque of motor only with winding phase current and the list of operation
First number of motors is relevant, and unrelated with the locus of running unit motor；When all units of N unit permagnetic synchronous motors are common
During operation, its basic electromagnetic torque is N times of one unit operation；
Te=NTe1(6)；
Step 6：Generator unit is opened a way, and repeat step two to step 5 draws q shaft current values during empty load of motor, this portion
Electric current is divided to be used for the iron loss and stray loss of balance motor, so not producing output torque；Input power and winding copper loss are calculated,
Draw motor iron loss and stray loss；Because multiple-unit permagnetic synchronous motor is mostly used for low speed occasion, so stator iron loss
Main component is magnetic hystersis loss；So under different rotating speeds, the iron loss relational expression of motor can approximate representation it is as follows：
By the motor iron loss measured by formula (7) and step 6, it can calculate in motor electromagnetic torque and speed curves
The iron loss each put, so as to calculate the power output of motor under this rotating speed by formula (8)：
Pout=Te·n-PFe(n)(8)；
Step 7：When obtaining whole units operations using the relation of a unit output torque and all unit electromagnetic torques
Motor electromagnetic torque, then calculate by electromagnetic torque the electromagnetic power of motor, then subtract the iron loss of motor, obtain motor
Power output, and record winding phase current when motor exports this power；
Step 8：As electrodynamic element circuit is accessed using all units are complete, drive control device is adjusted, added by controling winding
Direct-axis voltage and quadrature-axis voltage, the rotating speed for making motor are the rotating speed in step 2, and test out three-phase windings electric current now, are passed through
Dq conversion draws dq shaft currents I nowq2And Id2, and dq shaft currents now is met following formula：
(Id1)2+(Iq1)2=(Id2)2+(Iq2)2；
Step 9：The temperature rise of now motor is measured, the temperature rise curve of motor is obtained；
Step 10：Change generator unit terminate into load resistance resistance or load power network magnitude of voltage, repeat step
One to step 10, draws the temperature rise curve under the different rotating speeds of multiple-unit motor, different loads.
The stator winding of the multiphase multiple-unit AC magnetoelectric machine has N number of stand-alone unit, each independent operating
Unit is the symmetrical exchange windings (m1 is 3) of m1, and the number of phases m of multiphase multiple-unit permagnetic synchronous motor is：M=m1 × N, wherein N
For the integer more than 3.
Claims (1)
1. a kind of method of testing of multiphase multiple-unit magneto temperature rise, it is characterised in that its method and step is：
Step one：One unit of tested motor is used for generator operation, and this unit side is accessed into load resistance or load
Power network, during access load power network, control driver is first turned off；
Step 2：Another unit of tested motor is used for electric operation, and this unit is accessed into driver, is then controlled
Driver brings into operation, the motor speed of test now, three-phase windings current waveform and phase resistance magnitude of voltage, and from controller
Read the power angle under this state；
Step 3：Control driver that motor is out of service, the load of the unit for generating is then turned off, then respectively in electricity
All be passed through in the three-phase windings of moving cell with current effective value identical DC current under running status in step 2, and test it
Winding terminal voltage, obtains the winding resistance under this state；
Step 4：Three-phase windings current waveform is arranged, the direct current constant component I for trying to achieve q shaft currents is converted through dqq1With d shaft currents
Direct current constant component Id1, the alternating current with direct current biasing, direct current biasing electricity are passed through in the BC phase windings of electrodynamic element
The q shaft current direct current constant components for flowing to be tried to achieve；
Step 5：By the motor speed tested out, winding resistance, the ac-dc axis inductance of unit motor, power angle, q shaft currents
Stream stationary component brings formula (1), (2) and (5) into, and simultaneous is solved in this load, the next unit motor work of this rotating speed
Electromagnetic power when making；The principle of motor electromagnetic torque is calculated according to the parameter of electric machine：Electromagnetism during one unit electric operation of motor
The calculating of torque can be expressed as shown in formula (1)：
Te1=KTIq1 (1)
Wherein, KTFor moment coefficient, IqThe direct current constant component of q shaft currents after being converted for dq；According to the coefficient of potential and moment coefficient
Derivation and expression formula, their relational expression is as follows：
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The voltage equation of one unit of multiple-unit permagnetic synchronous motor can be expressed as form after dq coordinate transforms：
U1cosδ1=E0+IqRa-IdXd (3)
U1sinδ1=IdRa+IqXq (4)
Wherein, δ1For the power angle of an electrodynamic element, E0For unloaded back-emf, IdThe direct current constant of d shaft currents after being converted for dq
Component, XdFor d-axis reactance, XqFor quadrature axis reactance；Simultaneous formula (3) and formula (4), the expression formula that can solve q shaft currents are as follows：
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Wherein, Ld1For direct-axis synchronous inductance, Lq1For quadrature axis synchronous inductance, n is the rotating speed of motor；And by multiple-unit permanent magnet synchronous electric
The mathematical modeling of machine can find after being derived, the basic electromagnetic torque of motor only with winding phase current and the unit motor of operation
Quantity is relevant, and unrelated with the locus of running unit motor；When all units of N unit permagnetic synchronous motors are operated together
When, its basic electromagnetic torque is N times of one unit operation；
Te=NTe1(6)；
Step 6：Generator unit is opened a way, repeat step two to step 5, draws q shaft current values during empty load of motor, this part electricity
The iron loss and stray loss for balance motor are flowed, so not producing output torque；Input power and winding copper loss are calculated, is drawn
Motor iron loss and stray loss；Because multiple-unit permagnetic synchronous motor is mostly used for low speed occasion, so stator iron loss is main
Composition is magnetic hystersis loss；So under different rotating speeds, the iron loss relational expression of motor can approximate representation it is as follows：
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By the motor iron loss measured by formula (7) and step 6, it can calculate each in motor electromagnetic torque and speed curves
The iron loss of point, so as to calculate the power output of motor under this rotating speed by formula (8)：
Pout=Te·n-PFe(n)(8)；
Step 7：Electricity when whole units are run is obtained using the relation of a unit output torque and all unit electromagnetic torques
Electromechanical magnetic torque, then the electromagnetic power of motor is calculated by electromagnetic torque, then the iron loss of motor is subtracted, obtain the output of motor
Power, and record winding phase current when motor exports this power；
Step 8：All units are complete as electrodynamic element access circuit, adjust drive control device, the d-axis added by controling winding
Voltage and quadrature-axis voltage, the rotating speed for making motor are the rotating speed in step 2, and test out three-phase windings electric current now, are become through dq
Get out dq shaft currents I now in returnq2And ID2,And dq shaft currents now is met following formula：
(Id1)2+(Iq1)2==(Id2)2+(Iq2)2；
Step 9：The temperature rise of now motor is measured, the temperature rise curve of motor is obtained；
Step 10：Change generator unit terminate into load resistance resistance or load power network magnitude of voltage, repeat step one to
Step 10, draws the temperature rise curve under the different rotating speeds of multiple-unit motor, different loads.
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| CN108020783B (en) * | 2017-12-01 | 2019-05-24 | 哈尔滨工业大学 | A kind of motor temperature rise equivalent detecting method of short-time load excitation |
| CN109581221B (en) * | 2019-01-23 | 2021-05-25 | 北斗航天汽车（北京）有限公司 | Accurate test method for efficiency of PWM excitation source permanent magnet motor |
| JP2023539110A (en) * | 2020-11-24 | 2023-09-13 | ファーウェイ デジタル パワー テクノロジーズ カンパニー リミテッド | Motor controllers, heat exchange systems, and current injection methods |
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| JP2006223037A (en) * | 2005-02-09 | 2006-08-24 | Yaskawa Electric Corp | Motor controller and its control method |
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| US6910389B2 (en) * | 2001-11-12 | 2005-06-28 | International Rectifier Corporation | Rotor angle estimation for permanent magnet synchronous motor drive |
| 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 |
| CN102221673A (en) * | 2011-03-11 | 2011-10-19 | 哈尔滨工业大学 | Method for testing copper loss and temperature rise of multi-phase high-power low-speed permanent magnet synchronous motor |
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