CN110793690A - Method for testing motor efficiency on hybrid power assembly rack - Google Patents
Method for testing motor efficiency on hybrid power assembly rack Download PDFInfo
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- CN110793690A CN110793690A CN201911123721.0A CN201911123721A CN110793690A CN 110793690 A CN110793690 A CN 110793690A CN 201911123721 A CN201911123721 A CN 201911123721A CN 110793690 A CN110793690 A CN 110793690A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/26—Devices for measuring efficiency, i.e. the ratio of power output to power input
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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
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Abstract
The invention discloses a method for testing the efficiency of a motor on a hybrid power assembly rack, which comprises the steps of measuring the rotating speed and the torque of a driving dynamometer and then calculating to obtain the actual output power of the motor; the motor efficiency is calculated by measuring the values of the input voltage, the input current and the power factor of the motor.
Description
Technical Field
The invention relates to a performance test method of a hybrid power assembly, in particular to a method for testing the efficiency of a motor on a hybrid power assembly rack.
Background
The motor is the most main component of the hybrid power assembly, the efficiency of the motor must be tested in the process of developing the hybrid power, the current test of the motor efficiency is mainly carried out on a motor test bed or a MAP table of the relation between the transmission efficiency of each gear of a matched gearbox and the output torque of an input rotating speed box is tested on a gearbox performance test bed, the motor input voltage, the motor input current, the motor rotating speed, the gear of a speed changer, the left output torque of the hybrid power assembly rack and the right output torque of the hybrid power assembly rack are measured on a power assembly rack, the efficiency of the speed changer at the position is calculated by checking the MAP table according to the sum of the output torques of the hybrid power assembly rack, the transmission efficiency of the speed changer and the output torque of the hybrid power assembly rack, and finally the motor torque is calculated according to the motor input voltage, the speed ratio of the speed, And calculating the efficiency of the motor by using the motor input current, the power factor and the motor torque calculated by the motor rotating speed box.
The test object of the test bed in the former test mode is a motor unit, but the motor on the hybrid power product does not work independently, the working and running environment of the motor is the running environment of the power assembly, and the motor usually runs coordinately in the whole hybrid system when working. Therefore, the performance of the motor unit under certain specific conditions can be reflected by the motor efficiency test performed on the motor test bed, and the efficiency of the motor in the cooperative and coordinated operation of the whole hybrid power assembly cannot be tested.
The latter test method requires a lot of time to test the MAP table of the relationship between the transmission efficiency of each gear of the gearbox and the output torque of the input rotating speed box, and the measurement and calculation of the input voltage of the transmission efficiency box motor, the input current of the motor, the power factor and the torque of the motor rotating speed and the motor are performed in two different racks or two different rack connection modes, and such difference may cause the deviation of the measurement result.
Disclosure of Invention
In view of the above, the present invention provides a method for testing motor efficiency on a hybrid powertrain bench, so as to overcome the current situation that the motor efficiency cannot be tested on the hybrid powertrain bench.
The invention provides a method for testing the efficiency of a motor on a hybrid power assembly rack, which comprises the following steps:
the method comprises the following steps: when the tested motor does not work, the drive dynamometer outputs torque independently, the gearbox is controlled to be in a required gear or state, the load dynamometer and/or the load dynamometer is controlled by a rotating speed mode, the rotating speed of the load dynamometer and/or the load dynamometer is controlled to be the rotating speed required by a tested working condition point, the drive dynamometer is controlled to be in a torque mode, the torque of the drive dynamometer is adjusted to enable the torque measured by the load dynamometer and/or the load dynamometer to be the torque required by the tested working condition point, and the rotating speed and the torque of the drive dynamometer are recorded;
step two: controlling the torque of the driving dynamometer to be zero, adjusting the tested motor to enable the torque measured by the load dynamometer and/or the load dynamometer to be the torque required by the measured working condition point, and measuring data of input voltage, input current, power factor and motor rotating speed of the tested motor;
step three: calculating the power of the driving dynamometer through the rotating speed and the torque of the driving dynamometer measured in the step one, wherein the actual output power of the measured motor in the step two is equal to the power of the driving dynamometer in the step one;
step four: and finally, the motor efficiency is determined according to the motor input voltage, the motor input current, the power factor, the motor rotating speed and the calculated actual output power of the motor.
Further, the method for calculating the actual output power of the motor in the third step is as follows:
actual output power of motor = rotational speed of driving dynamometer in step one and torque of driving dynamometer in step one/9550
Further, the method for calculating the motor efficiency in the fourth step comprises the following steps:
motor efficiency = motor actual output power/(motor input voltage motor input current power factor) × 100%
Further, the motor input voltage, the motor input current and the power factor in the step two are obtained by measuring through a power analyzer.
Further, the rotating speed and the torque of the driving dynamometer, the load dynamometer and/or the load dynamometer in the first step and the second step are respectively obtained by measuring a dynamometer rotating speed sensor and a dynamometer torque flange.
Drawings
FIG. 1 is a schematic view of an installation structure of a hybrid powertrain cradle according to the present invention;
FIG. 2 is a flow chart illustrating a method for testing motor efficiency on a hybrid powertrain rack in accordance with the present invention.
Detailed Description
The technical solution in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
It is to be understood that the described embodiments are merely some embodiments and not all embodiments of the present application, and that the following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application and its applications.
In the present invention, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly and include, for example, fixed connections, detachable connections, or all manner of connections; "coupled" may be direct or indirect through an intermediary. The terms "upper", "lower", and the like indicate orientations or positional relationships based on the manner or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or units must have a specific orientation, be constructed and operated in a specific orientation. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1, the hybrid powertrain bench includes a driving dynamometer 6, a tested motor 5, a transmission 4, a load dynamometer 2, a load dynamometer 3, and a main reducer 1, where the driving dynamometer 6 is connected to an input shaft of the tested motor, the tested motor 5 is connected to the transmission 4 or inherited inside the transmission 4, the load dynamometer is connected to an output end of the powertrain, and if the transmission 4 directly outputs, a load dynamometer is required to measure data such as rotation speed and torque output by the transmission 4, and the load dynamometer may be the load dynamometer 2 or the load dynamometer 3; if the rear end of the gearbox 4 is also connected with the main reducer 1, two load dynamometers are needed to respectively measure data such as rotating speed, torque and the like at two output sides of the main reducer.
The method of the embodiment measures the motor efficiency of the gearbox 4 under different gear, different rotating speeds of the power assembly output end and different torque conditions, and comprises the following specific steps:
the method comprises the following steps: when the tested motor 5 does not work, the driving dynamometer 6 outputs torque alone, the gearbox 4 is controlled to be in a required gear or state, the load dynamometer 2 and/or the load dynamometer 3 is controlled by a rotating speed mode, the rotating speed of the load dynamometer 2 and/or the load dynamometer 3 is controlled to be the rotating speed required by a tested working condition point, the driving dynamometer 6 is controlled to be in a torque mode, the torque of the driving dynamometer 6 is adjusted to enable the torque measured by the load dynamometer 2 and/or the load dynamometer 3 to be the torque required by the tested working condition point, and the rotating speed and the torque of the driving dynamometer 6 are recorded;
step two: controlling the torque of the drive dynamometer 6 to be zero, adjusting the tested motor 5 to enable the torque measured by the load dynamometer 2 and/or the load dynamometer 3 to be the torque required by the measured working condition point, and measuring data of input voltage, input current, power factor and motor rotating speed of the tested motor 5;
step three: calculating the power of the drive dynamometer 6 according to the rotating speed and the torque of the drive dynamometer 6 measured in the step one, wherein the actual output power of the measured motor 5 in the step two is equal to the power of the drive dynamometer 6 in the step one;
step four: and finally, the motor efficiency is determined according to the motor input voltage, the motor input current, the power factor, the motor rotating speed and the calculated actual output power of the motor.
Further, the method for calculating the actual output power of the motor in the third step is as follows:
actual output power of motor = rotational speed of driving dynamometer in step one and torque of driving dynamometer in step one/9550
Further, the method for calculating the motor efficiency in the fourth step comprises the following steps:
motor efficiency = motor actual output power/(motor input voltage motor input current power factor) × 100%
Further, the motor input voltage, the motor input current and the power factor in the step two are obtained by measuring through a power analyzer.
Further, the rotating speed torques of the driving dynamometer 6, the load dynamometer 2 and/or the load dynamometer 3 in the first step and the second step are respectively obtained by measuring a dynamometer rotating speed sensor and a dynamometer torque flange.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A method of testing motor efficiency on a hybrid powertrain bench comprising the steps of:
the method comprises the following steps: when the tested motor does not work, the drive dynamometer outputs torque independently, the gearbox is controlled to be in a required gear or state, the load dynamometer and/or the load dynamometer is controlled by a rotating speed mode, the rotating speed of the load dynamometer and/or the load dynamometer is controlled to be the rotating speed required by a tested working condition point, the drive dynamometer is controlled to be in a torque mode, the torque of the drive dynamometer is adjusted to enable the torque measured by the load dynamometer and/or the load dynamometer to be the torque required by the tested working condition point, and the rotating speed and the torque of the drive dynamometer are recorded;
step two: controlling the torque of the driving dynamometer to be zero, adjusting the tested motor to enable the torque measured by the load dynamometer and/or the load dynamometer to be the torque required by the measured working condition point, and measuring data of input voltage, input current, power factor and motor rotating speed of the tested motor;
step three: calculating the power of the driving dynamometer through the rotating speed and the torque of the driving dynamometer measured in the step one, wherein the actual output power of the measured motor in the step two is equal to the power of the driving dynamometer in the step one;
step four: and finally, the motor efficiency is determined according to the motor input voltage, the motor input current, the power factor, the motor rotating speed and the calculated actual output power of the motor.
2. The method of claim 1, wherein the actual output power of the motor in step three is calculated by:
motor actual output = rotational speed of drive dynamometer in step one and torque of drive dynamometer in step one/9550.
3. The method of claim 1, wherein the motor efficiency is calculated in step four by:
motor efficiency = motor actual output power/(motor input voltage motor input current power factor) 100%.
4. The method of claim 1, wherein the motor input voltage, the motor input current, and the power factor in step two are measured by a power analyzer.
5. The method according to claim 1, characterized in that the rotational speed torques of the drive dynamometer and the load dynamometer and/or the load dynamometer in steps one and two are measured by a dynamometer rotational speed sensor and a dynamometer torque flange, respectively.
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| CN201911123721.0A CN110793690B (en) | 2019-11-17 | 2019-11-17 | Method for testing motor efficiency on hybrid power assembly rack |
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Cited By (3)
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| CN114577490A (en) * | 2022-01-18 | 2022-06-03 | 潍柴动力股份有限公司 | Power assembly rack parameter detection method, device and system |
| CN114814584A (en) * | 2022-06-20 | 2022-07-29 | 无锡市朗迪测控技术有限公司 | Vehicle powertrain testing method, system, computer device and medium |
| CN117387962A (en) * | 2023-09-07 | 2024-01-12 | 阿尔特汽车技术股份有限公司 | Method and device for testing average efficiency of electric drive assembly |
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