A multi-type motor synchronous control system and test device

Abstract

A kind of multi-class motor synchronous control system and test device, the control system includes asynchronous motor, permanent magnet motor, first IGBT inverter module, first SIC inverter module, second IGBT inverter module and second SIC inverter module;The AC output end of first IGBT inverter module and first SIC inverter module is respectively connected to the input end of contactor KM28 via contactor KM24, KM25, the output end of contactor KM28 is connected to the power input end of asynchronous motor;The AC output end of second IGBT inverter module and second SIC inverter module is respectively connected to the input end of contactor KM31 via contactor KM26, KM27, the output end of contactor KM31 is connected to the power input end of permanent magnet motor.The utility model still includes a kind of test device.The utility model can flexibly control different motor to complete each research work such as traction, tow etc., and utilize the same circuit frame to complete the characteristic test of different motor, quickly obtain the performance difference between various motors, so that the performance parameters of each kind of motor are more perfect to test.

Description

Technical Field

[0001] This utility model relates to the field of motor control technology, and in particular to a synchronous control system and testing device for multiple types of motors. Background Technology

[0002] In the field of motor drive and control, permanent magnet motors and asynchronous motors are widely used in new energy vehicles, industrial servo systems, wind power generation, and traction transmission due to their respective superior performance characteristics. Permanent magnet motors have the advantages of high power density and high efficiency, while asynchronous motors are known for their robustness, durability, low cost, and high reliability.

[0003] Currently, the conventional approach for testing and researching motors in the industry mainly involves using a power module with a fixed power rating and a single type of motor to form a one-to-one test platform. While this type of setup can meet certain motor performance testing requirements, it still has the following drawbacks: First, the power module is single and cannot be used to test multiple types of motors, and it cannot fully account for the differences in performance parameters between different motors. If it is necessary to test two (or more) different motors, multiple test devices need to be set up. This approach not only increases the number of devices and the complexity of the test, but also increases the maintenance costs and space requirements of the devices.

[0004] Secondly, when used in fields such as traction transmission, it is necessary to control permanent magnet motors and asynchronous motors simultaneously to complete various research tasks such as traction and towing. Therefore, traditional testing devices cannot complete the characteristic tests of different motors in the same circuit framework, thus failing to quickly determine the performance differences between various motors, resulting in low flexibility and efficiency. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned shortcomings of the prior art and provide a synchronous control system and testing device for various types of motors.

[0006] The technical solution of this utility model is: This utility model discloses a synchronous control system for various types of motors, including an asynchronous motor, a permanent magnet motor, and a first inverter module group and a second inverter module group that supply power to the motors respectively; the first inverter module group includes a first IGBT inverter module and a first SiC inverter module, and the second inverter module group includes a second IGBT inverter module and a second SiC inverter module. The AC output terminals of the first IGBT inverter module and the first SiC inverter module are respectively connected to the input terminal of contactor KM28 via contactors KM24 and KM25. The output terminal of contactor KM28 is connected to the power input terminal of the asynchronous motor. Contactors KM24 and KM25 are configured to selectively close one of them. The AC output terminals of the second IGBT inverter module and the second SiC inverter module are connected to the input terminal of contactor KM31 via contactors KM26 and KM27, respectively. The output terminal of contactor KM31 is connected to the power input terminal of the permanent magnet motor. Contactors KM26 and KM27 are configured to selectively close one of them.

[0007] Furthermore, the output terminals of contactors KM24 and KM25 are connected to the input terminal of contactor KM28, and the input terminal of contactor KM29 is connected to the output terminal of contactor KM31 and the power input terminal of the permanent magnet motor; the output terminals of contactors KM26 and KM27 are connected to the input terminal of contactor KM31, and the output terminal of contactor KM30 is connected to the output terminal of contactor KM28 and the power input terminal of the asynchronous motor.

[0008] Furthermore, the control system also includes a rectifier unit, whose DC output terminal is connected to the power input terminals of the first inverter module group and the second inverter module group through multiple selection contactors; the switching of each selection contactor is used to select at least one of the inverter modules to operate.

[0009] Furthermore, the rectifier unit includes at least two four-quadrant rectifiers based on different power devices.

[0010] Furthermore, the rectifier unit includes a four-quadrant rectifier UA5 based on IGBT devices and a four-quadrant rectifier UA6 based on SiC devices.

[0011] Furthermore, the AC power is connected to the input terminals of contactors KM2 to KM5 via a filter circuit; the output terminal of contactor KM2 is connected to the AC input terminal of the four-quadrant rectifier UA6, and the output terminal of contactor KM3 is connected to the AC input terminal of the four-quadrant rectifier UA5; the output terminal of contactor KM4 is connected to the AC input terminal of the four-quadrant rectifier UA6 via a current-limiting resistor; and the output terminal of contactor KM5 is connected to the AC input terminal of the four-quadrant rectifier UA5 via a current-limiting resistor; wherein, KM2 and KM3 serve as main circuit contactors, and KM4 and KM5 serve as pre-charging contactors.

[0012] Furthermore, the first inverter module group is installed in the first converter cabinet, the second inverter module group is installed in the second converter cabinet, the rectifier unit is installed in the rectifier cabinet, and the cabinets are connected to each other, as well as the first converter cabinet, the second converter cabinet and the asynchronous motor and permanent magnet motor, through the corresponding interfaces on the cabinets.

[0013] One type of testing device of this utility model includes a multi-type motor synchronous control system according to any one of the preceding claims.

[0014] Furthermore, it includes an equipment area and an operation area, which are physically separated by a partition wall; the partition wall is equipped with an observation window.

[0015] Furthermore, the operation area is equipped with a test operation table, on which at least one display is arranged to display the test parameters of the motor and control the switching of each contactor; the operation area is equipped with a work platform, on which the asynchronous motor and the permanent magnet motor are both installed.

[0016] The beneficial effects of this invention are as follows: Compared with previous traction test platforms that used the same inverter circuit to control the same type of motor, this invention uses different power devices as inverter outputs and cooperates with various contactors. On the one hand, it can flexibly control permanent magnet motors and asynchronous motors to complete various research tasks such as traction and towing, and use the same circuit framework to complete the characteristic tests of different motors, quickly obtain the performance differences between various motors, and thus more comprehensively test the performance parameters of various motors. It can also quickly and effectively switch during load switching. On the other hand, it eliminates the need to build multiple test devices, has a simple structure, and low maintenance costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall system circuit of an embodiment of this utility model; Figure 2 yes Figure 1 The diagram shows an enlarged view of the internal circuitry of the rectifier cabinet in the embodiment shown. Figure 3 yes Figure 1 The illustrated embodiment shows an enlarged schematic diagram of the internal circuitry of converter cabinet 1 and converter cabinet 2. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1 As shown: A synchronous control system for multiple types of motors includes a rectifier unit, four power modules, two traction motors, and several contactors. The power input terminals of the four power modules are connected to the DC output terminals of the rectifier unit via contactors. The AC output terminals of the four power modules are used to output variable frequency and variable voltage three-phase AC power to drive the two traction motors through the switching of the contactors.

[0020] Preferably, the four power modules include IGBT inverter module UA1, SiC inverter module UA2, IGBT inverter module UA3, and SiC inverter module UA4; the two traction motors are an asynchronous motor M1 and a permanent magnet motor M2. In this embodiment, IGBT inverter module UA1 and SiC inverter module UA2 are installed in converter cabinet 1, and IGBT inverter module UA3 and SiC inverter module UA4 are installed in converter cabinet 2. The rectifier unit is installed in the rectifier cabinet. The cabinets are connected to each other, and converter cabinet 1, converter cabinet 2, and the two traction motors are connected via corresponding interfaces on the cabinets.

[0021] Specifically, such as Figure 2 As shown, the rectifier unit can employ two sets of rectifier circuits, with the specific circuit selected via contactor switching. For example, the rectifier unit includes two four-quadrant rectifiers: UA5, based on IGBT devices, and UA6, based on SiC (silicon carbide) devices. Since the specific circuit structure of the rectifiers is existing technology, it will not be described in detail here. The two rectifiers are used to convert AC (380VAC) to DC (550-800VDC), with an output power of 50KW.

[0022] In this embodiment, a 380V three-phase mains power supply is input to the rectifier cabinet and, after passing through a filter circuit, is connected to the input terminals of contactors KM2 to KM5. The output terminal of contactor KM2 is connected to the AC input terminal of the four-quadrant rectifier UA6, and the output terminal of contactor KM3 is connected to the AC input terminal of the four-quadrant rectifier UA5. The output terminal of contactor KM4 is connected to the AC input terminal of the four-quadrant rectifier UA6 via current-limiting resistors (R5 to R7). Similarly, the output terminal of contactor KM5 is connected to the AC input terminal of the four-quadrant rectifier UA5 via current-limiting resistors (R8 to R10). The DC output terminals of UA5 and UA6 are connected to a common DC bus via dedicated DC interfaces on the cabinet. This common DC bus supplies power to the inverter modules in converter cabinets 1 and 2.

[0023] In this embodiment, KM2 and KM3 serve as main circuit contactors, used to conduct three-phase power input and perform corresponding protection functions. KM4 and KM5 are pre-charging contactors, used to pre-charge the four-quadrant rectifier UA5 / UA6 before startup. That is, pre-charging is the process of slowly charging the large-capacity capacitor inside the system through a current-limiting resistor before the main circuit is powered on, in order to avoid damage to the equipment by a huge instantaneous inrush current.

[0024] In this embodiment, the four-quadrant rectifiers UA5 and UA6 are redundantly designed, allowing different rectifiers to be selected for operation based on settings. For example, by disconnecting contactors KM2 and KM4 and connecting contactors KM3 and KM5, four-quadrant rectifier UA5 can be used. Therefore, when one rectifier fails, the other can immediately take over, ensuring system continuity and greatly improving system reliability and fault tolerance. Furthermore, users can flexibly and proactively choose which set of rectifiers to use to meet different testing objectives.

[0025] Understandably, both the four-quadrant rectifiers UA5 and UA6 possess reversible energy flow direction, enabling bidirectional flow from the grid to the DC bus and vice versa. For example, the first and second quadrants of the four-quadrant rectifier UA5 are in rectification mode, used to convert AC power into DC power to supply power to the downstream power modules and traction motors; while the third and fourth quadrants are in inverter mode, used to feed the generated electrical energy back to the DC bus when the downstream traction motor brakes, inverting the electrical energy on the DC bus into AC power that is in phase and frequency with the grid, and feeding it back to the grid.

[0026] like Figure 3 As shown: In this embodiment, contactors are also provided between the DC output terminals of the four-quadrant rectifiers UA5 and UA6 and the four power modules. The following explanation uses the IGBT inverter module UA1 as an example: The positive terminal of the DC output terminal of the four-quadrant rectifier UA6 is connected to the fuse FU1 and then splits into two branches. One branch connects to the positive power input terminal of the IGBT inverter module UA1 via contactor KM20 and resistor R1, and the other branch connects to the positive power input terminal of the IGBT inverter module UA1 via contactor KM12. The negative terminal of the DC output terminal of the four-quadrant rectifier UA6 is connected to the negative power input terminal of the IGBT inverter module UA1 via contactor KM13. Similarly, the wiring connection principle between the other three power modules and the rectifier is the same as that of the IGBT inverter module UA1, and will not be described in detail here. Please refer to [reference needed]. Figure 3 As shown. By switching the contactor, at least one inverter module can be selected to operate.

[0027] In this embodiment, a contactor KM28 is connected in series before the power input terminal of the asynchronous motor M1. The AC output terminal of the IGBT inverter module UA1 is connected to the input terminal of KM28 via contactor KM24; the AC output terminal of the SiC inverter module UA2 is connected to the input terminal of KM28 via contactor KM25. That is, the output terminals of contactors KM24 and KM25 converge at the input terminal of contactor KM28 and are ultimately connected to the asynchronous motor M1 via KM28. By controlling the selective closing of KM24 and KM25, either UA1 or UA2 can be selected to power the asynchronous motor M1. Similarly, a contactor KM31 is connected in series before the power input terminal of the permanent magnet motor M2. The AC output terminal of the IGBT inverter module UA3 is connected to the input terminal of KM31 via contactor KM26; the AC output terminal of the SiC inverter module UA4 is connected to the input terminal of KM31 via contactor KM27. That is, the output terminals of contactors KM26 and KM27 converge at the input terminal of contactor KM31, and are ultimately connected to the permanent magnet motor M2 through KM31. By controlling the selective closing of KM26 and KM27, the permanent magnet motor M2 can be powered by either UA3 or UA4.

[0028] In addition, the output terminals of contactors KM24 and KM25 are connected to the input terminal of contactor KM28, and also to the output terminal of contactor KM29. The input terminal of contactor KM29 is connected to the output terminal of contactor KM31 and the power input terminal of the permanent magnet motor M2. Similarly, the output terminals of contactors KM26 and KM27 are connected to the input terminal of contactor KM31, and also to the input terminal of contactor KM30. The output terminal of contactor KM30 is connected to the output terminal of contactor KM28 and the power input terminal of the asynchronous motor M1. By controlling the on / off state of KM29, it is possible to select whether UA1 or UA2 supplies power to the permanent magnet motor M2; by controlling the on / off state of KM30, it is possible to select whether UA3 or UA4 supplies power to the asynchronous motor M1.

[0029] Preferably, this embodiment also includes a testing device, comprising an equipment area and an operating area, to achieve functional zoning and personnel safety protection. The core load-bearing structure of the equipment area features a large cast iron work platform. The core power and testing equipment, such as the traction motor and torque measuring instrument, are rigidly mounted on this platform, ensuring stable operation under high-speed, high-torque conditions and accurate and reliable measurement data. The operating area is centered around a test workbench. The equipment area and operating area are physically separated by an isolation wall, which effectively isolates noise, vibration, and potential risks generated by equipment operation, ensuring operator safety. A tempered glass observation window is installed on the isolation wall, allowing operators to directly monitor the real-time operating status of the equipment area. Multiple monitors, such as nine 42-inch monitors, are arranged on the test workbench, forming a multi-screen collaborative display system. This design allows operators to directly observe equipment operation through the observation window and conveniently and efficiently view various test parameters, waveforms, and data displayed in real-time on the multi-screen system, achieving comprehensive, visual monitoring and data acquisition of the testing process.

[0030] The working principle of this embodiment is as follows: When the IGBT inverter module UA1 is working, one of the four-quadrant rectifiers can be selected to operate, and contactors KM20, KM12, and KM13 can be closed to connect the IGBT inverter module UA1 to the rectifier cabinet. The IGBT inverter module UA1 can supply power to the asynchronous motor M1 through the contactor circuits KM24 and KM28; alternatively, KM28 can be disconnected, and contactors KM24 and KM29 can be closed to supply power to the permanent magnet motor M2. Similarly: When the SIC inverter module UA2 is working, it can supply power to the permanent magnet motor M2 through the contactor circuits KM25 and KM29, and can also close KM25 and KM28 to supply power to the asynchronous motor M1.

[0031] When the IGBT inverter module UA3 is working, it can supply power to the asynchronous motor M1 through the contactor circuits KM26 and KM30, and can also close KM26 and KM31 to supply power to the permanent magnet motor M2.

[0032] When the SIC inverter module UA4 is working, it can supply power to the permanent magnet motor M2 through the contactor circuits KM27 and KM31, and can also close KM27 and KM30 to supply power to the asynchronous motor M1.

[0033] In this embodiment, contactors KM24 and KM25 are interlocked, and KM26 and KM27 are interlocked; the contactors can be switched on the test bench. Through the various contactor settings, it is possible to flexibly and conveniently connect to asynchronous motors or permanent magnet synchronous motors, thereby quickly realizing the switching of test system configurations such as SIC+permanent magnet, SIC+asynchronous, IGBT+permanent magnet, and IGBT+asynchronous. This allows for the completion of characteristic tests of different motors within the same circuit framework, quickly revealing the performance differences between various motors.

Claims

1. A synchronous control system for multiple types of motors, characterized in that, It includes an asynchronous motor, a permanent magnet motor, and a first inverter module group and a second inverter module group that supply power to them respectively; the first inverter module group includes a first IGBT inverter module and a first SiC inverter module, and the second inverter module group includes a second IGBT inverter module and a second SiC inverter module; The AC output terminals of the first IGBT inverter module and the first SiC inverter module are respectively connected to the input terminal of contactor KM28 via contactors KM24 and KM25. The output terminal of contactor KM28 is connected to the power input terminal of the asynchronous motor. Contactors KM24 and KM25 are configured to selectively close one of them. The AC output terminals of the second IGBT inverter module and the second SiC inverter module are connected to the input terminal of contactor KM31 via contactors KM26 and KM27, respectively. The output terminal of contactor KM31 is connected to the power input terminal of the permanent magnet motor. Contactors KM26 and KM27 are configured to selectively close one of them.

2. The multi-type motor synchronous control system according to claim 1, characterized in that, The output terminals of contactors KM24 and KM25 are connected to the input terminal of contactor KM28, and the output terminal of contactor KM29 is connected to the output terminal of contactor KM31 and the power input terminal of the permanent magnet motor. The output terminals of contactors KM26 and KM27 are connected to the input terminal of contactor KM31, and the output terminal of contactor KM30 is connected to the output terminal of contactor KM28 and the power input terminal of the asynchronous motor.

3. The multi-type motor synchronous control system according to claim 1 or 2, characterized in that, The control system also includes a rectifier unit, whose DC output terminal is connected to the power input terminals of the first inverter module group and the second inverter module group through multiple selection contactors; at least one inverter module is selected to operate by switching the selection contactors.

4. The multi-type motor synchronous control system according to claim 3, characterized in that, The rectifier unit includes at least two four-quadrant rectifiers based on different power devices.

5. The multi-type motor synchronous control system according to claim 4, characterized in that, The rectifier unit includes a four-quadrant rectifier UA5 based on IGBT devices and a four-quadrant rectifier UA6 based on SiC devices.

6. The multi-type motor synchronous control system according to claim 5, characterized in that, The AC power is filtered and connected to the input terminals of contactors KM2 to KM5 respectively; the output terminal of contactor KM2 is connected to the AC input terminal of four-quadrant rectifier UA6, and the output terminal of contactor KM3 is connected to the AC input terminal of four-quadrant rectifier UA5; the output terminal of contactor KM4 is connected to the AC input terminal of four-quadrant rectifier UA6 via a current-limiting resistor; the output terminal of contactor KM5 is connected to the AC input terminal of four-quadrant rectifier UA5 via a current-limiting resistor; among them, KM2 and KM3 are the main circuit contactors, and KM4 and KM5 are the pre-charge contactors.

7. The multi-type motor synchronous control system according to claim 3, characterized in that, The first inverter module group is installed in the first converter cabinet, the second inverter module group is installed in the second converter cabinet, the rectifier unit is installed in the rectifier cabinet, and the cabinets are connected to each other, as well as the first converter cabinet, the second converter cabinet and the asynchronous motor and permanent magnet motor, through the corresponding interfaces on the cabinets.

8. A testing apparatus, characterized in that, Including the various types of motor synchronous control systems according to any one of claims 1 to 7.

9. The test apparatus according to claim 8, characterized in that, It includes an equipment area and an operation area, which are physically separated by a partition wall; the partition wall is equipped with an observation window.

10. The experimental apparatus according to claim 9, characterized in that, The operating area is equipped with a test operating table, on which at least one display is arranged to display the test parameters of the motor and control the switching of each contactor; the operating area is also equipped with a work platform, on which the asynchronous motor and the permanent magnet motor are both mounted.

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