Electric control equipment aging test system

Abstract

The utility model provides an electric control equipment aging test system, and relates to the technical field of motor control, first sides of at least two electric control equipment are respectively connected with corresponding bidirectional power supplies, and second sides of the at least two electric control equipment are connected with each other; when the number of the electric control devices is greater than 2, the electric control devices are connected in series and in parallel; furthermore, electric energy transmission can be realized among different bidirectional power supplies through corresponding electric control equipment, so that the corresponding electric control equipment generates power consumption, and an aging test is realized; moreover, the aging test of the electric control equipment with different electric energy transmission directions can be realized in a twin-trawling manner through the process, and an additional motor does not need to be connected, so that the test cost can be reduced. In addition, when an aging test is carried out through dragging, each electric control device in operation can be tested at the same time, and the test efficiency is high. Moreover, when an aging test is carried out through twin trawling, electric energy generated by the test can be stored in one of the two-way power supplies, and energy recovery can be realized.

Description

Technical Field

[0001] The present application relates to the field of motor control technology, and in particular to an aging test system for electronically controlled equipment. Background Art

[0002] At present, for electronic control equipment such as motor controllers, in order to evaluate their performance changes and stability after long-term use, they are often required to undergo aging tests. That is, by simulating factors such as environmental changes in actual situations, their operation is controlled to verify their reliability and durability in actual use.

[0003] The current solution is usually to connect a motor to the output terminal of the electronic control device to perform an aging test on the electronic control device. However, the cost of the motor is relatively high, which makes the cost of the aging test of the electronic control device relatively high.

[0004] Therefore, how to reduce the cost of aging testing for electronic control equipment is a technical problem that needs to be solved urgently. Utility Model Content

[0005] In view of this, the present application provides an electronic control device aging test system to reduce the cost of performing aging tests on electronic control devices.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] The embodiment of the present application provides an electronic control device aging test system, comprising: at least two electronic control devices and at least two bidirectional power supplies; wherein,

[0008] There are at least two of the electronic control devices, and the first sides of the two electronic control devices are respectively connected to the corresponding bidirectional power supply;

[0009] There are at least two of the electronic control devices, whose second sides are connected to each other;

[0010] When the number of the electronic control devices is greater than 2, the electronic control devices are connected in series and in parallel.

[0011] In a possible implementation, the number of the electronic control devices is greater than 2 and is an even number, every two electronic control devices form a group, the second sides of the electronic control devices in the group are connected, and:

[0012] Each group is connected in series, and both ends of the series connection are respectively connected to a corresponding bidirectional power supply;

[0013] Alternatively, each group is connected in parallel, and both ends of the parallel connection are respectively connected to a corresponding bidirectional power supply.

[0014] In a possible implementation, when the groups are connected in parallel, the second sides of the electronic control devices are connected in parallel.

[0015] In a possible implementation, when the number of the electronic control devices is greater than 2, the second sides of the electronic control devices are connected to each other.

[0016] In a possible implementation, there are at least two of the electronic control devices, both sides of which are connected in parallel;

[0017] And / or, there are at least three of the electronic control devices, and the first sides of the three electronic control devices are respectively connected to the corresponding bidirectional power supply.

[0018] In a possible implementation, each of the electronically controlled devices operates in two opposite power transmission directions, and the sum of the rated powers of the electronically controlled devices in the two power transmission directions is the same.

[0019] In a possible implementation, the electronic control device is a single-stage conversion device or a two-stage conversion device.

[0020] In a possible implementation, the electronic control device includes: a DC / AC conversion circuit;

[0021] The DC side of the DC / AC conversion circuit is connected to the first side of the electronic control device;

[0022] The AC side of the DC / AC conversion circuit is connected to the second side of the electronic control device.

[0023] In a possible implementation, in the electric control device, at least two DC / AC conversion circuits are provided;

[0024] The DC side of each of the DC / AC conversion circuits is connected in parallel to the first side of the electronic control device;

[0025] The AC side of each of the DC / AC conversion circuits is connected to a line interface on the second side of the electronic control device, and is used to be connected to a corresponding line interface on the second side of another electronic control device.

[0026] In a possible implementation, the electronic control device further includes: a DC / DC conversion circuit;

[0027] The first side of the DC / DC conversion circuit is connected to the first side of the electronic control device;

[0028] The second side of the DC / DC conversion circuit is connected to the DC side of the DC / AC conversion circuit via a DC bus.

[0029] In a possible implementation, a first filter capacitor is provided between the positive and negative poles of the DC side of the DC / AC conversion circuit.

[0030] In a possible implementation, a first filter capacitor is provided between the positive and negative poles of the DC bus;

[0031] A second filter capacitor is provided between the positive and negative electrodes on the first side of the DC / DC conversion circuit.

[0032] In a possible implementation, for the electronic control devices connected to each other on the second side:

[0033] There is at least one of the electronic control devices, the DC / DC conversion circuit inside the device operates in a boost conversion mode, and the DC / AC conversion circuit inside the device operates in an inverter mode;

[0034] There is at least one other electronic control device, in which the DC / DC conversion circuit operates in a step-down conversion mode, and the DC / AC conversion circuit operates in a rectification mode.

[0035] In a possible implementation, for the electronic control devices connected to each other on the second side:

[0036] There is at least one of the electronic control devices, in which the reference voltage of the DC bus is greater than the reference voltage of the DC bus in at least one other electronic control device.

[0037] In a possible implementation, in the electronic control device, the reference voltage of the DC bus is a second-side reference voltage for the DC / DC conversion circuit in a control loop of the DC / DC conversion circuit.

[0038] In a possible implementation, the bidirectional power supply is a bidirectional direct current source.

[0039] As can be seen from the above technical solution, the present application provides an aging test system for electronic control equipment, which specifically includes at least two electronic control equipment and at least two bidirectional DC sources; wherein, there are at least two electronic control equipment, whose first sides are respectively connected to corresponding bidirectional power supplies; and there are at least two electronic control equipment, whose second sides are connected to each other; and when the number of electronic control equipment is greater than 2, each electronic control equipment is connected in series and parallel; and then, between different bidirectional power supplies, electric energy can be transmitted through the corresponding electronic control equipment, so that the corresponding electronic control equipment generates power consumption and realizes aging testing; and, each electronic control equipment with different directions of electric energy transmission can realize aging testing in the form of a pair through the above process, without the need to connect an additional motor, thereby reducing the testing cost. In addition, when performing an aging test on the pair, each electronic control equipment in operation can be tested at the same time, so the test efficiency is high; furthermore, when performing an aging test on the pair, the electric energy generated by the test will be stored in one of the bidirectional power supplies, and energy recovery can also be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0041] Figure 1 A schematic structural diagram of an embodiment of an electronic control device aging test system provided in an embodiment of the present application;

[0042] Figure 2 A schematic structural diagram of another embodiment of the electronic control device aging test system provided in an embodiment of the present application;

[0043] Figure 3 A schematic structural diagram of another embodiment of the electronic control device aging test system provided in an embodiment of the present application;

[0044] Figure 4 A schematic structural diagram of another embodiment of the electronic control device aging test system provided in an embodiment of the present application;

[0045] Figure 5 A schematic structural diagram of another embodiment of the electronic control device aging test system provided in an embodiment of the present application;

[0046] Figure 6 A schematic structural diagram of another embodiment of the electronic control device aging test system provided in an embodiment of the present application;

[0047] Figure 7 A schematic structural diagram of another embodiment of the electronic control device aging test system provided in an embodiment of the present application;

[0048] Figure 8 A schematic structural diagram of another embodiment of the electronic control device aging test system provided in an embodiment of the present application;

[0049] Figure 9 A schematic structural diagram of another embodiment of the electronic control device aging test system provided in an embodiment of the present application;

[0050] Figure 10 A schematic structural diagram of another embodiment of the electronic control device aging test system provided in an embodiment of the present application;

[0051] Figure 11 A schematic structural diagram of another embodiment of the electronic control device aging test system provided in an embodiment of the present application;

[0052] Figure 12A schematic structural diagram of another embodiment of the electronic control device aging test system provided in an embodiment of the present application;

[0053] Figure 13 A topological diagram of a DC / DC conversion circuit in an electronic control device in an electronic control device aging test system provided in an embodiment of the present application;

[0054] Figure 14 A topological diagram of a DC / AC conversion circuit in an electronic control device in an electronic control device aging test system provided in an embodiment of the present application;

[0055] Figure 15 A topological diagram of another embodiment of the electronic control equipment aging test system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0057] In this application, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0058] In order to ensure that electronic control equipment can operate reliably, they are required to undergo a certain degree of aging testing before leaving the factory to ensure that their performance is normal and reliable.

[0059] In order to reduce the cost of aging test for electronic control equipment, the embodiment of the present application provides an electronic control equipment aging test system, the specific structure of which is as follows: Figure 1 As shown, it specifically includes: at least two electronic control devices 10 and at least two bidirectional power supplies 20; the connection relationship between the various devices is specifically as follows:

[0060] There are at least two electronic control devices 10, whose first sides are respectively connected to corresponding bidirectional power supplies 20; there are at least two electronic control devices 10, whose second sides are connected to each other; when the number of electronic control devices 10 is greater than 2, each electronic control device 10 is connected in series and parallel.

[0061] Figure 1 In the figure, the electronic control device aging test system includes two electronic control devices 10 and two bidirectional power supplies 20. The second sides of the two electronic control devices 10 are connected to each other; and the first sides of the two electronic control devices 10 serve as the input and output ends of the electronic control device aging test system respectively, so that the input end of the electronic control device aging test system is connected to a bidirectional power supply 20, and the output end of the electronic control device aging test system is connected to another bidirectional power supply 20.

[0062] Figure 1 During operation, the electronically controlled device aging test system shown in the figure draws power from its connected bidirectional power supply 20 and transmits the received power to another electronically controlled device 10. The second electronically controlled device 10 then transmits the received power back to its connected bidirectional power supply 20. In other words, one bidirectional power supply 20 outputs power, while the other stores it. The two electronically controlled devices 10 transmit power in opposite directions, and they can swap directions, consuming power in a symmetric manner, simulating the operating state of the device during aging.

[0063] When the number of the electronic control devices 10 is greater than 2, the series-parallel connection relationship between the electronic control devices 10 can be implemented in various forms; Figures 2 to 8 Some examples of optional structures are given, such as:

[0064] The number of the electronic control devices 10 is greater than 2 and is an even number. Every two electronic control devices 10 form a group, and the second sides of the electronic control devices 10 in the group are connected; that is, the electronic control devices 10 are connected in series and parallel in groups.

[0065] In this case, the groups can be connected in series, with both ends of each group connected to a corresponding bidirectional power supply 20. In this case, adjacent groups are connected in series by connecting the first sides of adjacent electronic control devices 10.

[0066] Figure 2In the figure, the number of electronic control devices 10 is 4. The 4 electronic control devices 10 are divided into two groups. The connection relationship of the entire electronic control device aging test system is: a bidirectional power supply 20 is connected to the first side of the 1# electronic control device 10, the second side of the 1# electronic control device 10 is connected to the second side of the 2# electronic control device 10, the first side of the 2# electronic control device 10 is connected to the first side of the 3# electronic control device 10, the second side of the 3# electronic control device 10 is connected to the second side of the 4# electronic control device 10, and the first side of the 4# electronic control device 10 is connected to another bidirectional power supply 20.

[0067] Figure 2 In the illustrated configuration, each electronically controlled device 10 is grouped together for power supply. Assuming power is transmitted from the left bidirectional power source 20 to the right bidirectional power source 20, the power transmission direction for electronically controlled devices 10# and 3# is from their first side to their second side; while the power transmission direction for electronically controlled devices 2# and 4# is from their second side to their first side. When power is transmitted from the right bidirectional power source 20 to the left bidirectional power source 20, the power transmission direction for each electronically controlled device 10 is opposite to that in the aforementioned scenario.

[0068] Alternatively, in this case, the groups can also be connected in parallel, with both ends of each group connected to a corresponding bidirectional power supply 20. That is, the first sides of the two electronic control devices 10 in each group are connected in parallel with other groups.

[0069] Figure 3 The example in which the number of electronic control devices 10 is 4 is also used for demonstration. The 4 electronic control devices 10 are divided into two groups. The connection relationship of the entire electronic control device aging test system is: a bidirectional power supply 20 is respectively connected to the first side of the 1# electronic control device 10 and the first side of the 3# electronic control device 10, the second side of the 1# electronic control device 10 is connected to the second side of the 2# electronic control device 10, the second side of the 3# electronic control device 10 is connected to the second side of the 4# electronic control device 10, and the first side of the 2# electronic control device 10 and the first side of the 4# electronic control device 10 are both connected to another bidirectional power supply 20.

[0070] Figure 3 In the illustrated structure, each electronically controlled device 10 is also connected in pairs. Assuming power is transmitted from the left bidirectional power source 20 to the right bidirectional power source 20, the power transmission direction for electronically controlled devices 10# and 3# 10 is from their first side to their second side; while the power transmission direction for electronically controlled devices 2# 10 and 4# 10 is from their second side to their first side. When power is transmitted from the right bidirectional power source 20 to the left bidirectional power source 20, the power transmission direction for each electronically controlled device 10 is opposite to that in the aforementioned situation.

[0071] In addition, in the case where the groups are connected in parallel, the second sides of the electronic control devices 10 may also be connected between different groups. In this case, the second sides of the electronic control devices 10 are connected in parallel. Figure 4 In Figure 3 The basis shown is used as an example for demonstration. The case where there are more electronic control devices 10 can be deduced by analogy and will not be shown again.

[0072] In addition, when the number of electronic control devices 10 is greater than two, the electronic control devices 10 may not be connected in series or parallel in groups. For example, different electronic control devices 10 may be connected in series or parallel with one electronic control device 10 as a unit. In this case, the second sides of the electronic control devices 10 may be connected to each other.

[0073] Specifically, it can be configured as follows: there are at least two electronic control devices 10 , both sides of which are connected in parallel. Figure 5 In the figure, three electric control devices 10 are used as an example for demonstration, among which the 2# electric control device 10 and the 3# electric control device 10 are connected in parallel. After being connected in parallel, the two are connected to the 1# electric control device 10 for opposite power transmission; that is, the electric energy transmission direction of the 2# electric control device 10 and the 3# electric control device 10 is the same, and both are opposite to the electric energy transmission direction of the 1# electric control device 10.

[0074] Alternatively, when the second sides of the electric control devices 10 are connected to each other, it can also be arranged that: there are at least three electric control devices 10 , and the first sides of the three electric control devices are respectively connected to the corresponding bidirectional power supply 20 . Figure 6 The figure also shows three electronic control devices 10 as an example, among which the first sides of the 1# electronic control device 10, the 2# electronic control device 10 and the 3# electronic control device 10 are respectively connected to a corresponding bidirectional power supply 20. After the three are connected in parallel through the second side, there are two directions of power transmission during the aging test. One is to take power from the bidirectional power supply 20 connected to itself and transmit it to its second side, and the other is to take power from its second side and transmit it to the bidirectional power supply 20 connected to itself. The power transmission direction of any electronic control device 10 is not limited. As long as one of them is different from the other two, the power transmission can be achieved. Figure 7 In the figure, four electronic control devices 10 are used as an example to demonstrate. The first sides of the four electronic control devices 10 are respectively connected to a corresponding bidirectional power supply 20, and are connected in parallel through their respective second sides. At this time, the power transmission directions of the two electronic control devices 10 can be the same. In actual applications, the power transmission direction of any electronic control device 10 is not limited. As long as one is different from the other three, parallel drag can be achieved, which is within the protection scope of this application.

[0075] Alternatively, when the second sides of each electronic control device 10 are connected to each other, the above two situations can also be set to exist at the same time, that is, there are electronic control devices 10 with two sides connected in parallel, and there are at least three electronic control devices 10, whose first sides are respectively connected to the corresponding bidirectional power supply 20. Figure 8 In the figure, a total of 4 electronic control devices 10 are used as an example for demonstration, among which the 1# electronic control device 10 and the 3# electronic control device 10 are connected in parallel, and the first sides of the two are connected to the same bidirectional power supply 20; the 2# electronic control device 10 and the 4# electronic control device 10 are respectively connected to a corresponding bidirectional power supply 20; at this time, the power transmission direction of the 1# electronic control device 10 and the 3# electronic control device 10 is the same, and as long as the power transmission direction is opposite to that of one of the 2# electronic control device 10 and the 4# electronic control device 10, cross-pull can be achieved, and there is no limitation here.

[0076] In actual applications, the number of electronic control devices 10 can be greater and the connection relationship can be more complex, but as long as electric energy is transmitted in opposite directions through different electronic control devices 10, cross-drag can be achieved, thereby completing the aging test.

[0077] The electronic control equipment aging test system provided in this embodiment can realize power transmission between different bidirectional power supplies 20 through the corresponding electronic control equipment 10 through the above-mentioned principle, so that the corresponding electronic control equipment 10 generates power consumption and realizes aging testing; and, each electronic control equipment 10 with different power transmission directions can realize aging testing in the form of dragging through the above-mentioned process, without the need to connect additional motors, thereby reducing the testing cost.

[0078] Furthermore, by performing a burn-in test on a moped, all operating electronic control devices 10 can be tested simultaneously, thus improving testing efficiency. Furthermore, during the burn-in test, the electrical energy generated by the test is stored in one of the bidirectional power supplies 20, enabling energy recovery, such as feeding the energy back to the power grid, further reducing the cost of the burn-in test.

[0079] In actual applications, when the number of electronic control devices 10 is large, as mentioned above, although the number of electronic control devices 10 with the same power transmission direction is not limited, the power transmission direction can be allocated according to the rated power of each electronic control device 10, especially when the number of electronic control devices 10 is odd.

[0080] For example, Figure 5 The structure shown is taken as an example for explanation. It is more applicable to the case where the rated power of the 1# electric control device 10 is equal to the sum of the rated powers of the 2# electric control device 10 and the 3# electric control device 10. Of course, this structure can also be used when the rated powers of the three are the same. At this time, the operating power of the 1# electric control device 10 is equal to the sum of the operating powers of the 2# electric control device 10 and the 3# electric control device 10. The operating powers of the three can be distributed according to actual conditions and are not limited here.

[0081] for Figure 6In the illustrated structure, assuming that the rated power of the 1# electric control device 10 is equal to the sum of the rated powers of the 2# electric control devices 10 and the 3# electric control devices 10, it is preferable to set the power transmission direction of the 2# electric control device 10 and the 3# electric control device 10 to be the same, so that both can achieve mutual power supply with the 1# electric control device 10. Other structures are not described one by one.

[0082] That is, during the aging test, the goal can be to control each electronic control device 10 to operate in two opposite power transmission directions with the sum of the rated powers of the electronic control devices 10 in the two power transmission directions being the same; this setting can enable each electronic control device 10 to operate at its rated power during the aging test, which is beneficial to improving the effect of the aging test.

[0083] Based on the above embodiments, this embodiment further illustrates the structure of the electronic control device 10 in the electronic control device aging test system. That is, in actual applications, the electronic control device 10 can be a single-stage conversion device or a double-stage conversion device.

[0084] Specifically, when the first side of the electric control device 10 is used to connect to a DC power supply and the second side is used to connect to an AC motor, it can use a DC / AC conversion circuit to achieve single-stage power conversion between the DC power supply and the AC motor; that is, the DC power output by the DC power supply can be inverted into AC power to drive the AC motor, or the braking energy of the AC motor can be rectified into DC power and then recycled into the DC power supply. At this time, the electric control device aging test system is as follows: Figure 9 As shown in the figure, the bidirectional power supply 20 is a bidirectional DC source, the electronic control device 10 is a DC / AC conversion circuit 101, the DC side of the DC / AC conversion circuit 101 is connected to the first side of the electronic control device 10, and the AC side of the DC / AC conversion circuit 101 is connected to the second side of the electronic control device 10.

[0085] When the first side of the electronic control device 10 is used to connect to a DC power supply and the second side is used to connect to a DC motor, it can use a DC / DC conversion circuit to achieve single-stage power conversion between the DC power supply and the DC motor; specifically, the electric energy of the DC power supply can be converted into voltage to drive the DC motor, or the braking energy of the DC motor can be converted into voltage and then recovered into the DC power supply.

[0086] When the first side of the electronic control device 10 is used to connect to an AC power supply and the second side is used to connect to an AC motor, it can use an AC / AC conversion circuit to achieve single-stage power conversion between the AC power supply and the AC motor; specifically, the electric energy of the AC power supply can be frequency-converted to drive the AC motor, or the braking energy of the AC motor can be frequency-converted to be recovered into the AC power supply.

[0087] In practical applications, the number of internal conversion circuits of the electric control device 10 is not limited when the electric control device 10 is a single-stage conversion device. For example, the DC / AC conversion circuit 101 in the electric control device 10 can be provided with at least two ( Figure 10 Two are used as examples in the illustration; the DC side of each DC / AC conversion circuit 101 is connected in parallel to the first side of the electronic control device 10; the AC side of each DC / AC conversion circuit 101 is connected to a line interface on the second side of the electronic control device 10, respectively, for connection to a corresponding line interface on the second side of another electronic control device 10. Other conversion circuits used within this single-stage conversion device are not further described.

[0088] In addition, when the first side of the electronic control device 10 is used to connect to a DC power supply and the second side is used to connect to an AC motor, it can also use a DC / DC conversion circuit and a DC / AC conversion circuit connected in sequence to achieve two-stage power conversion. That is, on the basis of the single-stage power conversion achieved by the above-mentioned DC / AC conversion circuit, a DC / DC conversion circuit is added between the DC side and the first side of the electronic control device 10 to convert the voltage on both sides. In this case, the electronic control device aging test system is as follows: Figure 11 As shown in FIG, the bidirectional power supply 20 is a bidirectional DC source, and the electric control device 10 includes a DC / AC conversion circuit 101 and a DC / DC conversion circuit 102. The first side of the DC / DC conversion circuit 102 is connected to the first side of the electric control device 10, and the second side of the DC / DC conversion circuit 102 is connected to the DC side of the DC / AC conversion circuit 101. When the number of DC / AC conversion circuits 101 is greater than 1, as shown in FIG. Figure 12 As shown in , the second side of the DC / DC conversion circuit 102 is connected to the DC side of each DC / AC conversion circuit 101 through a DC bus 103 .

[0089] At present, with the development of power electronics technology, the motor controller connected between the DC power supply and the AC motor is gradually developing towards high voltage. However, the voltage of DC power supplies, such as batteries, is currently generally concentrated on the 400V platform, and 800V high-voltage batteries still have bottlenecks and are subject to constraints. In addition, in order to achieve high efficiency, the DC side voltage of the DC / AC conversion circuit corresponding to the optimal efficiency of the motor controller at different speeds and different torque conditions is not the same. Therefore, a DC / DC conversion circuit 102 can be added to the DC side of the DC / AC conversion circuit 101 in the electronic control device 10 to convert the battery voltage into the voltage required by the DC / AC conversion circuit 101.

[0090] When the electronic control device 10 contains only the DC / AC conversion circuit 101, since the inductive load can simulate the inductive load in the actual circuit, such as a motor, the electronic control device 10 only needs to be subjected to an aging test with pure inductance. At this time, since the power factor of the inductor is 0, it theoretically consumes no electrical energy. Only a small amount of energy will be dissipated in the form of heat or electromagnetic waves due to factors such as the resistance of the coil and the loss of the magnetic core. Therefore, the problem of high testing costs will not arise. However, for electronic control devices 10 with a DC / DC conversion circuit 102, due to its complex topology, the DC / DC conversion circuit 102 requires active power for aging testing. Therefore, a pure inductive load does not meet its aging test requirements. If the aging test is implemented by connecting a motor to the second side of the electronic control device 10, the testing cost will be high, and the electrical energy consumed by the aging test cannot be recycled.

[0091] At this time, the aging test is implemented by the pair-drag method provided in the above embodiment, which not only avoids the high cost problem caused by using a motor, but also realizes power recovery through the bidirectional DC source 20, further reducing the cost of the aging test.

[0092] Electronic control equipment 10 uses Figure 11 or Figure 12 In the two-stage conversion device shown, during the aging test using a pair-drag method, for each electronic control device 10 connected to each other on the second side: there is at least one electronic control device 10, whose internal DC / DC conversion circuit 102 operates in a boost conversion mode, and whose internal DC / AC conversion circuit 101 operates in an inverter mode; and there is at least one other electronic control device 10, whose internal DC / DC conversion circuit 102 operates in a buck conversion mode, and whose internal DC / AC conversion circuit 101 operates in a rectifier mode.

[0093] Specifically, Figure 12 Taking the structure shown as an example, if the power transmission direction of any electronic control device 10 is from its first side to its second side, then inside it: the DC / DC conversion circuit 102 draws power from the bidirectional DC source 20 connected to its first side, performs corresponding voltage conversion, such as step-up conversion, converts it into the DC power required by the DC / AC conversion circuit 101, and then outputs it to the DC / AC conversion circuit 101 through the DC bus 103; the DC / AC conversion circuit 101 operates in the inverter mode, that is, converts the received DC power into AC power, and then outputs it to the corresponding circuit interface on the second side of the other electronic control device 10.

[0094] If the power transmission direction of any electronically controlled device 10 is from its second side to its first side, then within the device 10: the DC / AC conversion circuit 101 receives AC power from the corresponding circuit interface on the second side of another electronically controlled device 10 and operates in a rectification mode, that is, converts the received AC power into DC power, which is then output to the DC / DC conversion circuit 102 via the DC bus 103; the DC / DC conversion circuit 102 performs corresponding voltage conversion, such as step-down conversion, and transmits the power to the bidirectional DC source 20 connected to its own first side.

[0095] for Figure 11 or Figure 12 In the structure shown, assuming that electric energy is transmitted from the bidirectional DC source 20 on the left to the bidirectional DC source 20 on the right, the bidirectional DC source 20 on the left outputs electric energy, the DC / DC conversion circuit 102 in the left electronic control device 10 operates in the boost conversion mode, and the DC / AC conversion circuit 101 in the left electronic control device 10 operates in the inverter mode; then, the DC / AC conversion circuit 101 in the right electronic control device 10 operates in the rectification mode, and the DC / DC conversion circuit 102 in the right electronic control device 10 operates in the step-down conversion mode, and finally the electric energy is stored in the bidirectional DC source 20 on the right. When electric energy is transmitted from the bidirectional DC source 20 on the right to the bidirectional DC source 20 on the left, the bidirectional DC source 20 on the right outputs electric energy, the DC / DC conversion circuit 102 in the right electronic control device 10 operates in the boost conversion mode, and the DC / AC conversion circuit 101 in the right electronic control device 10 operates in the inverter mode; then, the DC / AC conversion circuit 101 in the left electronic control device 10 operates in the rectification mode, and the DC / DC conversion circuit 102 in the left electronic control device 10 operates in the step-down conversion mode, and finally the electric energy is stored in the bidirectional DC source 20 on the left.

[0096] The above are only some optional methods of the electronic control device 10. In practical applications, including but not limited to these, no specific limitations are made here. It can be determined according to the specific situation and is within the scope of protection of this application.

[0097] Based on the existing electronic control equipment, this embodiment implements aging testing by reasonably controlling the working mode of the electronic control equipment, which can avoid the cost increase caused by the additional connection of the motor and reduce the aging test process. Moreover, the energy consumed by the aging test can be fed back to the power grid through the corresponding bidirectional power supply 20, reducing the active power consumption and achieving low-cost aging.

[0098] It is worth noting that the relevant technology can also conduct aging tests on the DC / DC conversion circuit and other parts in the electronic control equipment separately by leading out the DC bus copper bus, but this will add a step to the aging test process and reduce efficiency.

[0099] With the electronic control device aging test system provided in this embodiment, when any electronic control device 10 undergoes aging testing, there is no need to separately perform aging on its DC / DC converter circuit 102, thereby avoiding efficiency degradation. Furthermore, this embodiment can simultaneously test at least two electronic control devices 10, further improving testing efficiency.

[0100] Based on the above embodiment, this embodiment provides a detailed description of the control method of the electronic control device 10:

[0101] by Figure 12 Taking the structure shown as an example, if the reference voltages of the DC buses 103 in the two electronic control devices 10 are different, electric energy can flow from one electronic control device 10 to the other electronic control device 10, and the electronic control device aging test system can work.

[0102] Specifically, if Figure 12 If the reference voltage of the DC bus 103 in the left-side electronic control device 10 is greater than the reference voltage of the DC bus 103 in the right-side electronic control device 10, the left-side electronic control device 10 receives power from the bidirectional DC source 20 connected to its first side and converts it into AC power. The right-side electronic control device 10 receives this AC power and converts it into DC power, transmitting it to the bidirectional DC source 20 connected to it. In this case, power flows from the left side to the right side, from the left-side bidirectional DC source 20 to the right-side bidirectional DC source 20. Conversely, power flows from the right side to the left side, from the right-side bidirectional DC source 20 to the left-side bidirectional DC source 20.

[0103] In addition, when controlling the voltage of the DC bus 103 in each electronic control device 10, it can be achieved through the control loop of its internal DC / DC conversion circuit 102, that is, the reference voltage of the DC bus 103 can be: the second side reference voltage of the DC / DC conversion circuit 102 in the control loop of the DC / DC conversion circuit 102.

[0104] It should be noted that assuming the voltage on the second side of the left DC / DC conversion circuit 102 is V1 and the voltage on the second side of the right DC / DC conversion circuit 102 is V2, when the two voltages V1 and V2 are the same, there is no current flow or the current is almost 0 in the whole system; when V1 > V2, the current flows from left to right, and the energy is transferred from the bidirectional DC source 20 on the left to the bidirectional DC source 20 on the right; conversely, that is, when V1 < V2, the current flows from right to left, and the energy is transferred from the bidirectional DC source 20 on the right to the bidirectional DC source 20 on the left. Among them, since the input end and the output end of this electronic control device aging test system are both connected to the corresponding bidirectional DC source 20, it will cause the voltage loop in the control loop of the DC / DC conversion circuit 102 to saturate. Therefore, the transmitted active power is determined by the output of the current loop of the control system of the DC / DC conversion circuit 102.

[0105] The aging test method for the electronic control device with the DC / DC conversion circuit 102 provided in this embodiment utilizes the characteristic that the energy of the system can be transmitted bidirectionally. By dragging two electronic control devices against each other and connecting them to the corresponding bidirectional DC sources respectively, the aging tests for two electronic control devices can be realized simultaneously at a relatively low cost, and the energy can be recycled, greatly reducing the system complexity and improving the aging test efficiency.

[0106] On the basis of the above embodiment, this embodiment gives a detailed description of the topological structure of the conversion circuit in the electronic control device 10, for example:

[0107] The DC / DC conversion circuit 102 can adopt various topological structures, such as Figure 13 the interleaved parallel DC-DC conversion topology shown in, where the low-voltage side is used as the first side of the DC / DC conversion circuit 102, and the high-voltage side is used as the second side of the DC / DC conversion circuit 102. See Figure 13 , the interleaved parallel DC-DC conversion topology specifically includes: four switching tubes Q1 to Q4, and two inductors L1 and L2; the specific connection relationship between each device is: the output end of the first switching tube Q1 is connected to the input end of the second switching tube Q2, and the connection point is connected to one end of the first inductor L1; the output end of the third switching tube Q3 is connected to the input end of the fourth switching tube Q4, and the connection point is connected to one end of the second inductor L2; the input ends of the first switching tube Q1 and the third switching tube Q3 are connected, and the connection point is used as the positive pole of the second side of the DC / DC conversion circuit 102; the output ends of the second switching tube Q2 and the fourth switching tube Q4 are connected, and the connection point is used as the negative pole of the second side and the negative pole of the first side of the DC / DC conversion circuit 102; the other end of the first inductor L1 is connected to the other end of the second inductor L2, and the connection point is used as the positive pole of the first side of the DC / DC conversion circuit 102.

[0108] The first inductor L1 can be either an integrated inductor or a combined inductor, without specific limitation here. Furthermore, the second inductor L2 can be either an integrated inductor or a combined inductor, without specific limitation here. Both types of inductors are considered appropriate depending on the specific circumstances and are within the scope of protection of this application. Integrated inductors and combined inductors are well established in the prior art and will not be further elaborated upon here.

[0109] The first switching transistor Q1, the second switching transistor Q2, the third switching transistor Q3, and the fourth switching transistor Q4 are all fully controllable devices, such as IGBTs (Insulated Gate Bipolar Transistors) and MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors). The input and output terminals of each switching transistor refer to the current transmission direction when the switching transistor is in a controlled on state.

[0110] If the interleaved parallel DC-DC conversion topology operates in the boost conversion mode, the on-off states of the first switch Q1 and the third switch Q3 are the same, both are always off; the on-off states of the second switch Q2 and the fourth switch Q4 are the same, both are alternately on and off. If the interleaved parallel DC-DC conversion topology operates in the buck conversion mode, the on-off states of the second switch Q2 and the fourth switch Q4 are the same, both are always off; the on-off states of the first switch Q1 and the third switch Q3 are the same, both are alternately on and off. It should be noted that how the interleaved parallel DC-DC conversion topology operates in the boost conversion mode and the buck conversion mode is already mature in the prior art, and will not be described in detail here, but only briefly described above.

[0111] The above is only a specific implementation of the DC / DC conversion circuit 102. In practical applications, it includes but is not limited to this. For example, it can also adopt: bidirectional BUCK-BOOST circuit, bidirectional BOOST-BUCK circuit, bidirectional Cuk circuit, bidirectional Sepic-Zeta circuit, bidirectional two-bridge arm BUCK-BOOST circuit, three-phase staggered parallel DC-DC conversion topology, phase-shifted full-bridge topology, full-bridge isolated voltage source topology, full-bridge isolated current source topology, primary-side half-bridge circuit secondary-side push-pull circuit isolated voltage source topology and primary-side push-pull circuit secondary-side hybrid bridge circuit isolated current source topology. The topology of each circuit can be referred to the prior art and will not be described here one by one. The topology selection of the DC / DC conversion circuit 102 depends on its specific application environment and is within the scope of protection of this application.

[0112] The DC / AC conversion circuit 101 can also adopt a variety of topologies, such as a three-phase full-bridge inverter topology. Figure 14 As shown in , it specifically includes: six switching transistors Q5 to Q10; the connection relationship between the components is as follows: the output end of the fifth switching transistor Q5 is connected to the input end of the sixth switching transistor Q6, and the connection point serves as a single-phase port on the AC side of the DC / AC conversion circuit 101; the output end of the seventh switching transistor Q7 is connected to the input end of the eighth switching transistor Q8, and the connection point serves as another single-phase port on the AC side of the DC / AC conversion circuit 101; the output end of the ninth switching transistor Q9 is connected to the input end of the tenth switching transistor Q10, and the connection point serves as another single-phase port on the AC side of the DC / AC conversion circuit 101; the input end of the fifth switching transistor Q5, the input end of the seventh switching transistor Q7, and the input end of the ninth switching transistor Q9 are all connected, and the connection point serves as the positive electrode on the DC side of the DC / AC conversion circuit 101; the output end of the sixth switching transistor Q6, the output end of the eighth switching transistor Q8, and the output end of the tenth switching transistor Q10 are all connected, and the connection point serves as the negative electrode on the DC side of the DC / AC conversion circuit 101. Among them, the fifth switch tube Q5, the sixth switch tube Q6, the seventh switch tube Q7, the eighth switch tube Q8, the ninth switch tube Q9 and the tenth switch tube Q10 all adopt fully controlled devices, such as IGBT, MOSFET, etc. The input and output ends of each switch tube also refer to the current transmission direction when it is in a controlled conduction state. Through PWM (Pulse Width Modulation), the three-phase current output by the three-phase full-bridge inverter topology can be made into a sine wave with a phase difference of 120°. How the three-phase full-bridge inverter topology operates in inverter mode and rectification mode is already very mature in the prior art and will not be described in detail here.

[0113] In actual applications, the DC / AC conversion circuit 101 can also adopt a structure such as a three-phase neutral point clamped topology, which is not limited here and depends on its specific application environment. The topologies that implement DC / AC conversion in existing motor controllers are all within the protection scope of this application.

[0114] In addition, if the electric control device 10 only includes the DC / AC conversion circuit 101, a corresponding first filter capacitor C1 (such as Figure 14 ) to filter out the ripple current and ripple voltage between the positive and negative poles of the DC side of the DC / AC conversion circuit 101, thereby achieving smooth and stable DC side voltage of the DC / AC conversion circuit 101. If the electric control device 10 includes a DC / DC conversion circuit 102 and a DC / AC conversion circuit 101, then Figure 13As shown in FIG, not only can a corresponding first filter capacitor C1 be provided between the positive and negative electrodes of the DC side of the DC / AC conversion circuit 101 to achieve the above-mentioned filtering function, but also a second filter capacitor C2 can be provided between the positive and negative electrodes of the first side of the DC / DC conversion circuit 102 to filter out the ripple current and ripple voltage on the first side of the DC / DC conversion circuit 102, thereby preventing the service life of the bidirectional DC side 20 or the power supply connected during formal use from being affected by the ripple current and ripple voltage when reverse charging is performed.

[0115] For the filter capacitor C1 or C2, it can be an integrated capacitor or a combined capacitor, which is not specifically limited here and can be determined according to the specific situation, and is within the scope of protection of this application. Integrated capacitors and combined capacitors are already very mature in the prior art and will not be described in detail here.

[0116] With the rapid development of new energy vehicles, new energy hybrid passenger vehicles have made up for the shortcomings of traditional fuel vehicles and pure electric vehicles, and have received widespread attention, with their market share increasing. Figure 15 The structure shown implements dual-motor control, specifically connecting two different motors, such as a generator and an electric motor, via two DC / AC conversion circuits 101. A DC / DC conversion circuit 102 is then added to the DC side of the two DC / AC conversion circuits 101 to increase the battery voltage and simultaneously control the motoring and feeding states of the two motors, improving energy efficiency. Controlling the motoring and feeding states of the different motors involves precisely adjusting their operating parameters to ensure efficient load driving in motoring mode and efficient power generation in feeding mode.

[0117] use Figure 15 When the electronic control device 10 realizes dual-motor control, its DC / DC conversion circuit 102 can increase the 400V battery voltage to the bus voltage required by the motor (for example, 800V), and the use of the staggered parallel DC-DC conversion topology can improve the power density of the DC / DC conversion circuit 102; of course, in actual applications, corresponding circuits can be used according to needs, all within the scope of protection of this application.

[0118] For the above description of the disclosed embodiments, the features recorded in the various embodiments in this specification can be replaced or combined with each other, so that professional and technical personnel in this field can implement or use this application. The above description is only a preferred embodiment of the present application and does not limit this application in any form. Although the present application has been disclosed as above with preferred embodiments, it is not used to limit this application. Any technician familiar with this field can make many possible changes and modifications to the technical solution of this application using the methods and technical contents disclosed above without departing from the scope of the technical solution of this application, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application still falls within the scope of protection of the technical solution of this application.

Claims

1. An electronic control equipment aging test system, characterized in that: include: At least two electric control devices (10) and at least two bidirectional power supplies (20); wherein, There are at least two of the electric control devices (10), and the first sides of the electric control devices (10) are respectively connected to the corresponding bidirectional power supply (20); There are at least two of the electric control devices (10), the second sides of which are connected to each other; When the number of the electronic control devices (10) is greater than 2, the electronic control devices (10) are connected in series and in parallel.

2. The electronic control equipment aging test system according to claim 1, characterized in that: The number of the electronic control devices (10) is greater than 2 and is an even number, every two of the electronic control devices (10) form a group, the second sides of the electronic control devices (10) in the group are connected, and: Each group is connected in series, and both ends of the series connection are respectively connected to a corresponding bidirectional power supply (20); Alternatively, each group is connected in parallel, and both ends of the parallel connection are respectively connected to a corresponding bidirectional power supply (20).

3. The electronic control equipment aging test system according to claim 2, characterized in that: When the groups are connected in parallel, the second sides of the electric control devices (10) are connected in parallel.

4. The electronic control equipment aging test system according to claim 1, characterized in that: When the number of the electric control devices (10) is greater than 2, the second sides of the electric control devices (10) are connected to each other.

5. The electronic control equipment aging test system according to claim 4, characterized in that: There are at least two of the electric control devices (10), both sides of which are connected in parallel; And / or, there are at least three of the electric control devices (10), and the first sides of the three electric control devices (10) are respectively connected to corresponding bidirectional power supplies (20).

6. The electronic control equipment aging test system according to any one of claims 3 to 5, characterized in that: Each of the electric control devices (10) operates in two opposite power transmission directions, and the sum of the rated powers of the electric control devices (10) in the two power transmission directions is the same.

7. The electronic control equipment aging test system according to any one of claims 1 to 5, characterized in that: The electric control device (10) is a single-stage conversion device or a two-stage conversion device.

8. The electronic control equipment aging test system according to any one of claims 1 to 5, characterized in that: The electric control device (10) comprises: a DC / AC conversion circuit (101); The DC side of the DC / AC conversion circuit (101) is connected to the first side of the electric control device (10); The AC side of the DC / AC conversion circuit (101) is connected to the second side of the electric control device (10).

9. The electronic control equipment aging test system according to claim 8, characterized in that: In the electric control device (10), at least two DC / AC conversion circuits (101) are provided; The DC side of each of the DC / AC conversion circuits (101) is connected in parallel to the first side of the electric control device (10); The AC side of each DC / AC conversion circuit (101) is connected to a second-side line interface of the electric control device (10), respectively, and is used to be connected to a corresponding line interface on the second side of another electric control device (10).

10. The electronic control equipment aging test system according to claim 8, characterized in that: The electric control device (10) further includes: a DC / DC conversion circuit (102); The first side of the DC / DC conversion circuit (102) is connected to the first side of the electric control device (10); The second side of the DC / DC conversion circuit (102) is connected to the DC side of the DC / AC conversion circuit (101) via a DC bus (103).

11. The electronic control equipment aging test system according to claim 8, characterized in that: A first filter capacitor (C1) is provided between the positive and negative poles of the DC side of the DC / AC conversion circuit (101).

12. The electronic control equipment aging test system according to claim 10, characterized in that: A first filter capacitor (C1) is provided between the positive and negative poles of the DC bus; A second filter capacitor (C2) is provided between the positive and negative electrodes on the first side of the DC / DC conversion circuit (102).

13. The electronic control equipment aging test system according to claim 10, characterized in that: For each of the electric control devices (10) connected to each other on the second side: There is at least one of the electric control devices (10), wherein the DC / DC conversion circuit (102) inside the electric control device operates in a boost conversion mode, and the DC / AC conversion circuit (101) inside the electric control device operates in an inverter mode; There is at least one other electric control device (10), wherein the DC / DC conversion circuit (102) inside the electric control device operates in a step-down conversion mode, and the DC / AC conversion circuit (101) inside the electric control device operates in a rectification mode.

14. The electronic control equipment aging test system according to claim 10, characterized in that: For each of the electric control devices (10) connected to each other on the second side: There is at least one of the electric control devices (10), the reference voltage of the DC bus (103) inside the electric control device (10) being greater than the reference voltage of the DC bus (103) in at least one other electric control device (10).

15. The electronic control equipment aging test system according to claim 14, characterized in that: In the electric control device (10), the reference voltage of the DC bus (103) is a second-side reference voltage for the DC / DC conversion circuit (102) in a control loop of the DC / DC conversion circuit (102).

16. The electronic control equipment aging test system according to claim 8, characterized in that: The bidirectional power supply (20) is a bidirectional direct current source.

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