CN107356436B - Integrated automobile power system test bed - Google Patents
Integrated automobile power system test bed Download PDFInfo
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- CN107356436B CN107356436B CN201710525136.8A CN201710525136A CN107356436B CN 107356436 B CN107356436 B CN 107356436B CN 201710525136 A CN201710525136 A CN 201710525136A CN 107356436 B CN107356436 B CN 107356436B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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Abstract
The invention relates to an integrated automobile power system test bench, which comprises: the automobile power system test module is connected with a power system of an automobile and used for testing the automobile power system; and the mode switching module is connected with the automobile power system test module and is used for switching the test mode according to the type of the automobile power system to be tested. Compared with the prior art, the invention has the advantages of mode switching, easy realization, cost saving and the like.
Description
Technical Field
The invention relates to the field of testing of automobile power systems, in particular to an integrated automobile power system test bench.
Background
With the increasingly prominent global energy and environmental problems, the development of novel automobiles with low oil consumption and low emission becomes the primary task of the development of the current automobile industry. Under the background, hybrid electric vehicles and pure electric vehicles become low-emission and low-energy-consumption vehicles with the most application prospect at present. In the development and design process of a power system of a hybrid electric vehicle and a pure electric vehicle, a bench test of the power system is an extremely necessary link. Compared with a traditional automobile power system, the hybrid electric vehicle and the pure electric vehicle power system are additionally provided with an electric power system, so that the traditional automobile power system test bench cannot meet test requirements. In the existing method, for testing a hybrid electric vehicle and a pure electric vehicle, a power battery or an electric load is often needed to be purchased, and the existing power system test bed is modified and upgraded, but the cost is higher.
Disclosure of Invention
The invention aims to provide an integrated automobile power system test bed frame aiming at the problems.
The purpose of the invention can be realized by the following technical scheme:
an integrated automotive power system test rig, the test rig comprising:
the automobile power system test module is connected with a power system of an automobile and used for testing the automobile power system;
and the mode switching module is connected with the automobile power system test module and is used for switching the test mode according to the type of the automobile power system to be tested.
The automobile power system test module comprises:
the power supply unit is used for providing electric energy for the test of the automobile power system;
the braking unit is connected with the power supply unit and is used for allocating the regenerated electric energy generated by the automobile power system;
the dynamometer is respectively connected with a power system and a power supply unit of the automobile and used for realizing the test of the power system of the automobile.
The power supply unit includes:
the alternating current power supply is used for providing alternating current for the test of the automobile power system;
and the rectifying circuit is respectively connected with the alternating current power supply, the braking unit and the dynamometer and is used for converting alternating current provided by the alternating current power supply into direct current.
The AC power source includes a common DC bus.
The power supply unit further comprises an inverter circuit, and the inverter circuit is respectively connected with the rectifying circuit and the dynamometer and is used for converting direct current provided by the rectifying circuit into an alternating current power supply with adjustable parameters.
The mode switching module includes:
the DC/DC converter is connected with the automobile power system test module and is used for switching the test voltage of the automobile power system test module;
and the mode switching control unit is connected with the DC/DC converter and is used for controlling the working state of the DC/DC converter.
The mode switching control unit includes:
the voltage acquisition assembly is respectively connected with the DC/DC converter and the automobile power system test module and is used for acquiring sampling voltage and reference voltage;
the voltage comparator is connected with the voltage acquisition assembly and used for comparing the sampling voltage with the reference voltage;
the MCU controller is connected with the voltage comparator and is used for sending out a control signal according to a comparison result;
and the pulse width modulation control circuit is respectively connected with the MCU controller and the DC/DC converter and is used for carrying out duty ratio regulation according to a control signal sent by the MCU controller so as to realize voltage regulation of the DC/DC converter.
The voltage acquisition assembly comprises:
the sampling voltage acquisition line is respectively connected with the DC/DC converter and the voltage comparator and is used for acquiring the output voltage of the DC/DC converter as a sampling voltage;
and the reference voltage acquisition line is respectively connected with the automobile power system test module and the voltage comparator and is used for acquiring the power supply voltage provided by the automobile power system test module as the reference voltage.
The test modes comprise a traditional power system test mode, a pure electric system test mode and a hybrid power system test mode.
Compared with the prior art, the invention has the following beneficial effects:
(1) the test bench provided by the invention is realized by the automobile power system test module and the mode switching module, and the automobile power system test module is basically not different from the traditional automobile power system test bench, namely the test bench provided by the invention is only added with the test module which can be matched with the automobile power system on the basis of the traditional automobile power system test bench, so that the mode switching module for testing the traditional automobile power system, the pure electric automobile power system and the hybrid electric automobile power system is realized, and the test bench which is adaptive to a tested object and can be switched is realized.
(2) The power supply unit of the automobile power system test module finally adopts a public direct current bus for power supply, the power supply mode is compared with the mode of additionally purchasing a power battery or an electric load, the cost is greatly saved, meanwhile, the public direct current bus provides electric energy for the system when the system works in an electric state, the extra electric energy generated by the system can be received when the system works in a power generation state, and the energy-saving purpose is achieved by effectively allocating energy.
(3) The power supply unit converts common alternating current provided by the common direct current bus into direct current firstly and then converts the direct current into alternating current with adjustable voltage and frequency through the rectifying circuit and the inverter circuit, so that the power utilization requirement of an automobile power system during testing is met, the implementation mode is simple and convenient, the cost is low, and the practicability is high.
(4) The mode switching module realizes the purpose of providing required voltage for the system at any time according to the test requirement of the automobile power system through the cooperation of the DC/DC converter and the mode switching control unit.
(5) The mode switching control unit comprises a voltage acquisition assembly, a voltage comparator, an MCU controller and a pulse width modulation control circuit, the change of voltage is realized by adjusting the duty ratio of alternating current in the automobile power system test module, and the mode switching control unit is simple in realization mode and strong in practicability.
Drawings
FIG. 1 is a schematic structural diagram of an integrated automotive power system test bed;
FIG. 2 is a schematic structural diagram of a mode switching module;
the system comprises a rectifier circuit 1, a DC/DC converter 2, an inverter circuit 3, a mode switching control unit 4, an automobile power system to be tested 5, a dynamometer 6, a brake unit 7, an MCU controller 41, a pulse width modulation control circuit 42 and a voltage comparator 43.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1, the present embodiment provides an integrated test bed for a vehicle powertrain system, comprising: the automobile power system test module is connected with a power system of an automobile and used for testing the automobile power system; and the mode switching module is connected with the automobile power system test module and is used for switching the test mode according to the type of the automobile power system 5 to be tested.
Wherein, car driving system test module includes: the power supply unit is used for providing electric energy for the test of the automobile power system; the braking unit 7 is connected with the power supply unit and used for allocating the regenerated electric energy generated by the automobile power system; and the dynamometer 6 is respectively connected with a power system and a power supply unit of the automobile and is used for realizing the test of the power system of the automobile. The power supply unit includes: the alternating current power supply is used for providing alternating current for the test of the automobile power system; the rectifying circuit 1 is respectively connected with the alternating current power supply, the brake unit 7 and the dynamometer 6 and is used for converting alternating current provided by the alternating current power supply into direct current. The ac power source includes a common dc bus. The power supply unit further comprises an inverter circuit 3, wherein the inverter circuit 3 is respectively connected with the rectifying circuit 1 and the dynamometer 6 and is used for converting direct current provided by the rectifying circuit 1 into an alternating current power supply with adjustable parameters. The mode switching module includes: the DC/DC converter 2 is connected with the automobile power system test module and used for switching the test voltage of the automobile power system test module; the mode switching control unit 4, as shown in fig. 2, is connected to the DC/DC converter 2 for controlling the operating state of the DC/DC converter 2. The mode switching control unit 4 includes: the voltage acquisition assembly is respectively connected with the DC/DC converter 2 and the automobile power system test module and is used for acquiring sampling voltage and reference voltage; a voltage comparator 43 connected to the voltage acquisition component for comparing the sampled voltage with the reference voltage; the MCU controller 41 is connected with the voltage comparator 43 and used for sending out a control signal according to a comparison result; and the pulse width modulation control circuit 42 is respectively connected with the MCU controller 41 and the DC/DC converter 2, and is configured to perform duty ratio adjustment according to a control signal sent by the MCU controller 41, so as to adjust the voltage of the DC/DC converter 2. The voltage acquisition subassembly includes: a sampling voltage collection line connected to the DC/DC converter 2 and the voltage comparator 43, respectively, for collecting the output voltage of the DC/DC converter 2 as a sampling voltage; and the reference voltage acquisition line is respectively connected with the automobile power system test module and the voltage comparator 43 and is used for acquiring the power supply voltage provided by the automobile power system test module as the reference voltage. The test modes comprise a traditional power system test mode, a pure electric system test mode and a hybrid power system test mode.
The working process of the rack is as follows: firstly, an automobile power system 5 to be tested is connected with an automobile power system test module, when the traditional power system test is carried out, only the engine needs to be connected with the dynamometer 6, when the pure electric system test is carried out, the driving motor is respectively connected with the DC/DC converter 2 and the dynamometer 6, when the hybrid power system test is carried out, the engine and the ISG motor are coaxially connected, then the ISG motor is connected with the DC/DC converter 2, and a power output shaft is connected with the dynamometer 6; after connection, the mode switching module is controlled according to the type of a system to be tested, when a traditional power system test is carried out, the mode switching control unit 4 is adjusted to enable the DC/DC converter 2 to be in a non-operating state, the traditional power system is directly tested according to a traditional method, when a pure electric system test is carried out, the mode switching control unit 4 is adjusted to change the output voltage of the DC/DC converter 2, namely when the output voltage of the DC/DC converter 2 is higher than the voltage on the common direct current bus, the mode switching control unit 4 is adjusted to reduce the output voltage of the DC/DC converter 2, when the output voltage of the DC/DC converter 2 is lower than the voltage on the common direct current bus, the mode switching control unit 4 is adjusted to increase the output voltage of the DC/DC converter 2, when a hybrid power system is tested, the engine is coaxially connected with the ISG motor, the ISG motor is connected with the DC/DC converter 2, the power output shaft is connected with the dynamometer, the output voltage of the DC/DC converter 2 is changed by adjusting the mode switching control unit 4 according to a hybrid power voltage platform, and the adjusting process is similar to a pure electric test.
Claims (3)
1. An integrated automotive power system test rig, the test rig comprising:
the automobile power system test module is connected with the power system of the automobile and used for testing the automobile power system,
the mode switching module is connected with the automobile power system testing module and used for switching the testing mode according to the type of the automobile power system to be tested;
the automobile power system test module comprises:
the power supply unit is used for providing electric energy for the test of the automobile power system,
the braking unit is connected with the power supply unit and is used for allocating the regenerative electric energy generated by the automobile power system,
the dynamometer is respectively connected with a power system and a power supply unit of the automobile and is used for realizing the test of the power system of the automobile;
the mode switching module includes:
the DC/DC converter is connected with the automobile power system test module and used for switching the test voltage of the automobile power system test module,
the mode switching control unit is connected with the DC/DC converter and is used for controlling the working state of the DC/DC converter;
the mode switching control unit includes:
the voltage acquisition component is respectively connected with the DC/DC converter and the automobile power system test module and is used for acquiring sampling voltage and reference voltage,
the voltage comparator is connected with the voltage acquisition component and used for comparing the sampling voltage with the reference voltage,
the MCU controller is connected with the voltage comparator and used for sending out a control signal according to the comparison result,
the pulse width modulation control circuit is respectively connected with the MCU controller and the DC/DC converter and is used for carrying out duty ratio regulation according to a control signal sent by the MCU controller so as to realize voltage regulation of the DC/DC converter;
the power supply unit includes:
the alternating current power supply is used for providing alternating current for the test of the automobile power system,
the rectifying circuit is respectively connected with the alternating current power supply, the braking unit and the dynamometer and is used for converting alternating current provided by the alternating current power supply into direct current;
the AC power source comprises a common DC bus;
the voltage acquisition assembly comprises:
a sampling voltage collecting line respectively connected with the DC/DC converter and the voltage comparator for collecting the output voltage of the DC/DC converter as a sampling voltage,
the reference voltage acquisition line is respectively connected with the automobile power system test module and the voltage comparator and is used for acquiring the power supply voltage provided by the automobile power system test module as a reference voltage;
the working process of the rack is as follows: firstly, an automobile power system to be tested is connected with an automobile power system test module, when the traditional power system test is carried out, only an engine needs to be connected with a dynamometer, when a pure electric system test is carried out, a driving motor is respectively connected with a DC/DC converter and the dynamometer, when a hybrid power system test is carried out, the engine and an ISG motor are coaxially connected, then the ISG motor is connected with the DC/DC converter, and a power output shaft is connected with the dynamometer; after connection, the mode switching module is controlled according to the type of a system to be tested, when a traditional power system test is carried out, the mode switching control unit is adjusted to enable the DC/DC converter to be in a non-operating state, when a pure electric system test is carried out, the mode switching control unit is adjusted to change the output voltage of the DC/DC converter, when the output voltage of the DC/DC converter is higher than the voltage on the common direct current bus, the mode switching control unit is adjusted to reduce the output voltage of the DC/DC converter, when the output voltage of the DC/DC converter is lower than the voltage on the common direct current bus, the mode switching control unit is adjusted to increase the output voltage of the DC/DC converter, when a hybrid power system is tested, the engine is coaxially connected with the ISG motor, and the ISG motor is connected with the DC/DC converter, the power output shaft is connected with the dynamometer, the output voltage of the DC/DC converter is changed by adjusting the mode switching control unit according to the hybrid power voltage platform, and the adjusting process is similar to that of pure electric testing.
2. The integrated automotive power system test bench of claim 1, wherein the power supply unit further comprises an inverter circuit, and the inverter circuit is connected with the rectifier circuit and the dynamometer respectively, and is used for converting the direct current provided by the rectifier circuit into an alternating current power supply with adjustable parameters.
3. The integrated automotive powertrain system test stand of claim 1, wherein the test modes include a traditional powertrain system test mode, a pure electric system test mode, and a hybrid powertrain system test mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710525136.8A CN107356436B (en) | 2017-06-30 | 2017-06-30 | Integrated automobile power system test bed |
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| CN201710525136.8A CN107356436B (en) | 2017-06-30 | 2017-06-30 | Integrated automobile power system test bed |
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| CN107356436B true CN107356436B (en) | 2019-12-27 |
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