CN111443288A - Low-cost new energy automobile motor test power supply - Google Patents
Low-cost new energy automobile motor test power supply Download PDFInfo
- Publication number
- CN111443288A CN111443288A CN202010341425.4A CN202010341425A CN111443288A CN 111443288 A CN111443288 A CN 111443288A CN 202010341425 A CN202010341425 A CN 202010341425A CN 111443288 A CN111443288 A CN 111443288A
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- power supply
- new energy
- energy automobile
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
- G01R1/203—Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
- G01R1/206—Switches for connection of measuring instruments or electric motors to measuring loads
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/36—Overload-protection arrangements or circuits for electric measuring instruments
-
- 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
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Inverter Devices (AREA)
Abstract
The application discloses low-cost new energy automobile motor test power contains: the control circuit unit is respectively connected with the unidirectional direct-current power supply unit and the bleeder device; the control circuit unit is used for controlling the unidirectional direct-current power supply unit to output required direct-current voltage according to the set output direct-current voltage value, monitoring the voltage value of the output end of the unidirectional direct-current power supply unit in real time, sending a switching-on instruction to the discharge device, and executing switching-on action after the discharge device receives the switching-on instruction to rapidly discharge a capacitor in the unidirectional direct-current power supply unit. The invention provides a low-cost direct current power supply for testing a new energy automobile motor, which can provide adjustable direct current voltage at lower cost and can absorb reverse electromotive force energy fed back by a motor controller when the motor is braked or suddenly stopped.
Description
Technical Field
The application relates to the technical field of new energy automobile testing, in particular to a low-cost new energy automobile motor testing power supply.
Background
When a motor of a currently mainstream new energy automobile is tested, a battery simulator or a bidirectional direct-current power supply is generally used for simulating a power battery on the new energy automobile and providing direct-current voltages of different levels. The battery simulator or the bidirectional direct-current power supply generally comprises an AC/DC circuit and a DC/DC circuit, and is isolated by using a power frequency transformer at the alternating-current side, so that the cost is high.
With the gradual large-scale production of new energy automobile motor, need use a low-cost DC power supply when motor ageing and off-line test: the adjustable direct-current voltage can be provided, the back electromotive force fed back by the motor controller can be quickly absorbed when the motor brakes or suddenly stops, the power for absorbing the feedback energy only needs to be less than 50% of the rated power of the motor, and the adjustable direct-current voltage is not required to be suitable for a motor feed test.
Content of application
Aiming at the defects of the prior art, the invention provides the low-cost direct current power supply for the motor test of the new energy automobile, which can provide adjustable direct current voltage at lower cost and can absorb reverse electromotive force energy fed back by a motor controller when the motor is braked or suddenly stopped.
The invention provides a low-cost new energy automobile motor test power supply, which comprises:
the control circuit unit is respectively connected with the unidirectional direct-current power supply unit and the bleeder device; the control circuit unit is used for controlling the unidirectional direct-current power supply unit to output required direct-current voltage according to the set output direct-current voltage value, monitoring the voltage value of the output end of the unidirectional direct-current power supply unit in real time, sending a switching-on instruction to the discharge device, and executing switching-on action after the discharge device receives the switching-on instruction to rapidly discharge a capacitor in the unidirectional direct-current power supply unit.
Preferably, the bleeding device includes a fast switching device V1 and a bleeding resistor R, and when the fast switching device V1 and the bleeding resistor R are connected in series and then respectively connected to the output end of the unidirectional dc power supply unit, the fast switching device V1 is configured to execute a switching operation according to a switching command sent by the control circuit unit.
Preferably, the fast switching device V1 includes at least one of an IGBT or a triac.
Preferably, the bleeder resistor comprises an R-aluminum case wire wound resistor.
Preferably, the unidirectional dc power supply unit includes an input rectification circuit, an inverter circuit, a high-frequency isolation transformer, a high-frequency rectification circuit, and a filter circuit, the input rectification circuit is connected to the inverter circuit, the inverter circuit is connected to the high-frequency isolation transformer, the high-frequency isolation transformer is connected to the high-frequency rectification circuit, and the high-frequency rectification circuit is connected to the filter circuit.
Preferably, the input rectification circuit is a three-phase full bridge rectifier; the inverter circuit is an H inverter bridge consisting of 4 IGBTs; the high-frequency isolation transformer is a transformer with the working frequency more than 8 KHz; the high-frequency rectification filter circuit is a high-frequency full-bridge rectifier consisting of 4 fast recovery diodes; the filter circuit is a combination of a high frequency inductor and a capacitor.
The invention also provides a low-cost new energy automobile motor, which comprises the low-cost new energy automobile motor test power supply in any one of the above embodiments.
The invention also provides a low-cost new energy automobile motor, which comprises the low-cost new energy automobile motor in any one of the above embodiments.
The invention has the following beneficial effects:
the invention provides a low-cost direct current power supply for testing a new energy automobile motor, which is connected with an inverter circuit through an input rectification circuit, the inverter circuit is connected with a high-frequency isolation transformer, the high-frequency isolation transformer is connected with a high-frequency rectification circuit, the high-frequency rectification circuit is connected with a filter circuit to form the direct current power supply with the high-frequency isolation transformer, and adjustable direct current voltage is provided through the high-frequency inverter circuit with lower cost.
The fast switch device V1 and the discharge resistor R are connected in series and then are respectively connected to the output end of the unidirectional direct current power supply unit to form an energy discharge device, and the energy discharge device absorbs the motor back electromotive force energy fed back by the motor controller
The direct-current power supply for the low-cost new energy automobile motor test can supply and absorb energy conveniently and freely, and the switching time is within 1 ms;
the invention provides a low-cost direct-current power supply for testing a new energy automobile motor, which uses an absorption resistor with smaller power and volume to absorb reverse energy of 500% of rated power of the resistor in a short time.
The direct-current power supply for the motor test of the new energy automobile is low in cost and beneficial to construction of a new energy automobile motor test production line.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a circuit implementation structure of a low-cost dc power supply for a new energy motor test according to the present invention.
Fig. 2 is an electrical schematic diagram of one implementation of the unidirectional dc power supply unit of fig. 1.
Fig. 3 is an electrical schematic of one implementation of the vent apparatus of fig. 1.
The reference numbers illustrate:
wherein: 1. a unidirectional direct current power supply unit; 2. a relief device; 3. a control circuit unit; 4. an input rectification circuit; 5. an inverter circuit; 6. a high frequency isolation transformer; 7. a high-frequency rectification circuit; 8. and a filter circuit.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that all the directional indications (such as up, down, left, right, front, and rear … …) in the embodiment of the present application are only used to explain the relative position relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indication is changed accordingly.
In addition, descriptions in this application as to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, technical solutions between the various embodiments of the present application may be combined with each other, but it must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should be considered to be absent and not within the protection scope of the present application.
Referring to fig. 1, the invention specifically illustrates a circuit implementation structure of a low-cost direct current power supply for a new energy motor test. In the invention, a unidirectional direct-current power supply unit 1, a discharge device 2 and a control circuit unit 3 are arranged, wherein the control circuit unit 3 is respectively connected with the unidirectional direct-current power supply unit 1 and the discharge device 2; the control circuit unit 3 is used for controlling the unidirectional direct-current power supply unit 1 to output required direct-current voltage according to the set output direct-current voltage value, monitoring the voltage value of the output end of the unidirectional direct-current power supply unit 1 in real time, sending a switching-on instruction to the discharge device 2 by the control circuit unit 3, and executing switching-on action after the discharge device 2 receives the switching-on instruction to rapidly discharge a capacitor in the unidirectional direct-current power supply unit 1.
As shown in fig. 2, the unidirectional dc power supply unit 1 includes an input rectification circuit 4, an inverter circuit 5, a high-frequency isolation transformer 6, a high-frequency rectification circuit 7, and a filter circuit 8, wherein the input rectification circuit 4 is connected to the inverter circuit 5, the inverter circuit 5 is connected to the high-frequency isolation transformer 6, the high-frequency isolation transformer 6 is connected to the high-frequency rectification circuit 7, and the high-frequency rectification circuit 7 is connected to the filter circuit 8.
The input rectification circuit 4 is a three-phase full bridge rectifier.
The inverter circuit 5 is an H inverter bridge consisting of 4 IGBTs.
The high-frequency isolation transformer 6 is a transformer with the working frequency of more than 8 KHz.
The high-frequency rectifying and filtering circuit 7 is a high-frequency full bridge rectifier consisting of 4 fast recovery diodes.
The filter circuit 8 is a combination of a high frequency inductor and a capacitor.
As shown in fig. 3, the bleeding device 2 includes a fast switching device V1 and a bleeding resistor R, and when the fast switching device V1 and the bleeding resistor R are connected in series and then respectively connected to the output terminal of the unidirectional dc power supply unit 1, the fast switching device V1 is configured to execute a switching operation according to a switching command sent by the control circuit unit 3.
The fast switching device V1 performs switching according to a switching instruction sent by the control circuit, and implements on and off of the bleeder resistor, which may be an IGBT or a triac.
And the bleeder resistor R is an aluminum shell winding resistor.
When in use, the control circuit unit 3 controls the unidirectional direct current power supply unit 1 to output the required direct current voltage according to the output direct current voltage value used for setting, simultaneously, the voltage value of the output end of the unidirectional direct current power supply unit 1 is monitored in real time, when the monitored voltage value obviously exceeds a set value, the difference value can be set, the set range is 0-100V, namely, the tested new energy automobile motor is judged to feed back energy to the direct current power supply system, and then the tested new energy automobile motor is judged to be in a braking or sudden stop state, at the moment, the control circuit unit 3 sends a switching-on instruction to the IGBT in the discharge device 2, the IGBT executes the switching-on action after receiving the switching-on instruction, the discharge resistor R is connected to the output end of the unidirectional direct current power supply unit 1 through the IGBT, and the capacitor in the unidirectional direct-current power supply unit 1 is quickly discharged, so that the motor and the motor controller of the tested new energy automobile are protected from being damaged due to overvoltage.
In practice, the rated power of the bleeder resistor R is selected to be 10% of the rated power of the unidirectional dc power supply unit 1, and the overload can be more than 500% within 10 seconds. When the bleeder resistor R is connected to the output end of the unidirectional dc power supply unit 1 according to the above working process, the bleeder resistor R always works in an overload state, so that the capacitor C is quickly discharged, the voltage at the two ends of the capacitor C can be discharged to the set voltage generally within several seconds, the control circuit unit 3 sends a turn-off signal to the IGBT at this time, the IGBT receives a turn-off command and then performs a turn-off action, and the bleeder resistor R is cut off from the loop.
The power supply system can realize the following parameters and functions:
the conversion time from the rectification output to the discharge absorption is less than 1 ms.
The rated discharge absorption power only needs 10% of the power of the motor to be measured, and the instantaneous absorption power can reach 50% of the power of the motor.
The power supply system implemented by the scheme has low cost and can generate great economic benefit for enterprises such as new energy automobile motor manufacturers, so that the power supply system has wide application prospect in test equipment in the fields of new energy automobile motors and the like.
Claims (8)
1. The utility model provides a low-cost new energy automobile motor test power which characterized in that contains:
the device comprises a unidirectional direct-current power supply unit (1), a discharge device (2) and a control circuit unit (3), wherein the control circuit unit (3) is respectively connected with the unidirectional direct-current power supply unit (1) and the discharge device (2); the control circuit unit (3) is used for controlling the unidirectional direct-current power supply unit (1) to output required direct-current voltage according to the set output direct-current voltage value, monitoring the voltage value of the output end of the unidirectional direct-current power supply unit (1) in real time, sending a switching-on instruction to the discharge device (2) by the control circuit unit (3), and executing switching-on action after the discharge device (2) receives the switching-on instruction to quickly discharge a capacitor in the unidirectional direct-current power supply unit (1).
2. The low-cost new energy automobile motor test power supply according to claim 1, wherein the unidirectional direct current power supply unit (1) comprises an input rectification circuit (4), an inverter circuit (5), a high-frequency isolation transformer (6), a high-frequency rectification circuit (7) and a filter circuit (8), the input rectification circuit (4) is connected with the inverter circuit (5), the inverter circuit (5) is connected with the high-frequency isolation transformer (6), the high-frequency isolation transformer (6) is connected with the high-frequency rectification circuit (7), and the high-frequency rectification circuit (7) is connected with the filter circuit (8).
3. The low-cost new energy automobile motor test power supply according to claim 1, wherein the bleeder device (2) comprises a fast switching device V1 and a bleeder resistor R, and when the fast switching device V1 and the bleeder resistor R are connected in series and then respectively connected to the output end of the unidirectional direct current power supply unit (1), the fast switching device V1 is configured to perform a switching operation according to a switching command sent by the control circuit unit (3).
4. The low-cost new energy automobile motor test power supply as claimed in claim 3, wherein the fast switching device V1 comprises at least one of an IGBT or a bidirectional thyristor.
5. The low-cost new energy automobile motor test power supply as claimed in claim 3, wherein the bleeder resistor comprises an R aluminum case winding resistor.
6. The low-cost new energy automobile motor test power supply as claimed in claim 2,
the input rectifying circuit (4) is a three-phase full-bridge rectifier; the inverter circuit (5) is an H inverter bridge consisting of 4 IGBTs; the high-frequency isolation transformer (6) is a transformer with the working frequency of more than 8 KHz; the high-frequency rectification filter circuit (7) is a high-frequency full-bridge rectifier consisting of 4 fast recovery diodes; the filter circuit (8) is a combination of a high frequency inductor and a capacitor.
7. A low-cost new energy automobile motor is characterized by comprising the low-cost new energy automobile motor test power supply according to claims 1-6.
8. A low-cost new energy automobile motor, which is characterized by comprising the low-cost new energy automobile motor according to claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010341425.4A CN111443288A (en) | 2020-04-27 | 2020-04-27 | Low-cost new energy automobile motor test power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010341425.4A CN111443288A (en) | 2020-04-27 | 2020-04-27 | Low-cost new energy automobile motor test power supply |
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| Publication Number | Publication Date |
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| CN111443288A true CN111443288A (en) | 2020-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010341425.4A Pending CN111443288A (en) | 2020-04-27 | 2020-04-27 | Low-cost new energy automobile motor test power supply |
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