Current verification device of integrated DCDC dual-motor controller assembly

Abstract

The utility model discloses a current check device of integrated DCDC double motor controller assembly, include: DCDC power module, its B+ output end and double motor controller's TM motor's U phase interface connection, its B the output end and double motor controller's T interface connection, DCDC main control chip, its integration is in DCDC power module, and its current sampling end is connected to the output loop of DCDC power module, current sampling circuit module, its sampling input end is connected with double motor controller's TM motor's U phase interface and double motor controller's T interface respectively, microcontroller, its built -in in double motor controller, and its input end is connected with current sampling circuit module's sampling output end, and host computer is connected with DCDC main control chip and microcontroller respectively. The utility model has low cost high efficiency, problem discovery forward, product internal closed loop and so on advantage.

Description

Technical Field

[0001] This utility model relates to the field of motor controller current verification technology, and in particular to a current verification device for an integrated DC-DC dual motor controller assembly. Background Technology

[0002] Currently, the current verification test performed on dual-motor controllers after they are off the production line mainly uses purchased high-precision current verification equipment. This requires third-party suppliers to develop non-standard testing systems to verify the accuracy of the DC-DC output current.

[0003] The main drawbacks of existing technical solutions are:

[0004] 1. High cost: High-precision current calibration equipment is expensive, and each product upgrade or production line expansion requires additional equipment purchase and system development costs, resulting in high testing costs;

[0005] 2. Poor compatibility: Purchased equipment is usually developed for specific product models, and it is difficult to make it compatible with different DC-DC product models. When introducing new products, it is necessary to redevelop or modify the testing system, resulting in a long adaptation cycle.

[0006] 3. Limited capacity expansion: The delivery cycle of third-party non-standard equipment is long, and when expanding capacity, it is necessary to purchase new equipment and debug the system, which cannot quickly respond to the demand for capacity growth;

[0007] 4. Difficult to maintain: When equipment fails, maintenance relies on the original manufacturer, resulting in long response times. Furthermore, equipment upgrades and modifications require additional costs, increasing the production line's operation and maintenance costs.

[0008] Therefore, through beneficial exploration and research, the applicant has found a solution to the above problems, and the technical solution to be introduced below is the result of this research. Utility Model Content

[0009] The technical problem to be solved by this utility model is to provide a current verification device for an integrated DC-DC dual motor controller assembly that is low in cost, high in efficiency, and has good compatibility, in order to overcome the shortcomings of the existing technology.

[0010] The technical problem to be solved by this utility model can be achieved by the following technical solution:

[0011] A current verification device integrating a DC-DC dual-motor controller assembly, characterized in that it comprises:

[0012] The DC-DC power module has its B+ output terminal connected to the U-phase interface of the TM motor of the dual-motor controller, and its B- output terminal connected to the T- interface of the dual-motor controller to form a closed current path.

[0013] The DC-DC main control chip is integrated into the DC-DC power module, and its current sampling terminal is connected to the output circuit of the DC-DC power module for real-time acquisition of the output current of the DC-DC power module itself.

[0014] A current sampling circuit module, wherein the sampling input terminal of the current sampling circuit module is connected to the U-phase interface of the TM motor of the dual motor controller and the T-interface of the dual motor controller respectively, and is used to collect the current in the closed current path;

[0015] A microcontroller, the microcontroller being built into a dual-motor controller, has its input terminal connected to the sampling output terminal of the current sampling circuit module; and

[0016] The host computer is connected to both the DC-DC main control chip and the microcontroller.

[0017] In a preferred embodiment of this utility model, the B+ output terminal of the DC-DC power module is connected to the U-phase interface of the TM motor of the dual motor controller via a first copper wire, and its B- output terminal is connected to the T- interface of the dual motor controller via a second copper wire.

[0018] In a preferred embodiment of this utility model, the first copper wire and the second copper wire are low-impedance, low-temperature drift copper wires.

[0019] In a preferred embodiment of this utility model, the DC-DC main control chip adopts a DSP processor.

[0020] In a preferred embodiment of this utility model, the DC-DC master control chip has a CAN communication interface, and the CAN communication interface of the DC-DC master control chip is connected to the host computer through a CAN bus.

[0021] In a preferred embodiment of this utility model, the microcontroller is a TC387 microcontroller.

[0022] In a preferred embodiment of this utility model, the microcontroller has a CANFD communication interface, and the CANFD communication interface of the microcontroller is connected to the host computer through the CANFD bus.

[0023] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows:

[0024] 1. Low cost and high efficiency: Utilizing the TM motor and TC387 microcontroller built into the dual-motor controller as the current sampling loop, there is no need to purchase high-precision calibration equipment. The DCDC output accuracy and MCU acquisition loop calibration are completed in one test, which significantly reduces the test cost and improves efficiency.

[0025] 2. Proactive Problem Discovery: Accuracy issues in the MCU current acquisition circuit can be detected during the DCDC offline testing phase, without having to wait until the vehicle or machine testing phase, reducing the cost of problem discovery. At the same time, by comparing the data from the two independent acquisition channels in real time, the consistency and reliability of the acquisition system can be verified.

[0026] 3. Internal closed loop of the product: This utility model utilizes the current sampling hardware (DSP and TC387) already present in the DCDC and dual motor controller products, and connects the output / input of the two through copper wire to form a current loop. Internal closed loop verification can be achieved during offline testing without the need for additional hardware tools. It is convenient to deploy and easy to promote in batches. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of this utility model.

[0029] Figure 2 This is a flowchart of the process of this utility model. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations.

[0031] See Figure 1 The figure shows a current verification device integrating a DC-DC dual-motor controller assembly, including a DC-DC power module 100, a DC-DC main control chip 200, a current sampling circuit module 300, a microcontroller 400, and a host computer 500.

[0032] The B+ output terminal of the DC-DC power module 100 is connected to the U-phase interface of the TM motor of the dual-motor controller 10, and its B- output terminal is connected to the T- interface of the dual-motor controller 10, forming a closed current path from the B+ output terminal through the U-phase of the TM motor, the internal windings of the motor, and back to the B- output terminal via the T- interface. In this embodiment, the B+ output terminal of the DC-DC power module 100 is connected to the U-phase interface of the TM motor of the dual-motor controller 10 via a first copper wire, and its B- output terminal is connected to the T- interface of the dual-motor controller 10 via a second copper wire. The first and second copper wires are low-impedance, low-temperature-drift copper wires to ensure current transmission accuracy.

[0033] The DC-DC main control chip 200 is integrated within the DC-DC power module 100. Its current sampling terminal is connected to the output circuit of the DC-DC power module 100 for real-time acquisition of the output current of the DC-DC power module 100. In this embodiment, the DC-DC main control chip 200 uses a DSP processor and acquires the output current through an internal ADC, with a sampling frequency of no less than 60kHz. The DC-DC main control chip 200 has a CAN communication interface, which is connected to the host computer 500 via a CAN bus. The transmission rate of the CAN bus is no less than 2Mbps.

[0034] The sampling input terminal of the current sampling circuit module 300 is connected to the U-phase interface of the TM motor of the dual motor controller 10 and the T-interface of the dual motor controller 10, respectively, for collecting the current in the closed current path.

[0035] The microcontroller 400 is built into the dual-motor controller 10. Its input terminal is connected to the sampling output terminal of the current sampling circuit module 300, and it is used to acquire the current in the closed current path collected by the current sampling circuit module 300. In this embodiment, the microcontroller 400 is a TC387 microcontroller, which samples the current in the closed current path at a frequency of not less than 10kHz through the current sampling circuit module 300. The microcontroller 400 has a CANFD communication interface 410, which is connected to the host computer 500 through the CANFD bus.

[0036] In a preferred embodiment of this utility model, the transmission rate of the CANFD bus is not less than 2Mbps.

[0037] The host computer 500 is connected to the DC-DC main control chip 200 and the microcontroller 400 respectively. It is used to receive and parse the current messages from the DC-DC main control chip 200 and the microcontroller 400 respectively, and output the current deviation and qualification judgment result after comparing the two current values.

[0038] See Figure 2 and combined Figure 1 The working process of the current verification device of the integrated DC-DC dual-motor controller assembly of this utility model is as follows:

[0039] Step S1: Connect the B+ output terminal of the DC-DC power module 100 to the U-phase interface of the TM motor of the dual motor controller 10 using copper wire, and connect the B- output terminal of the DC-DC power module 100 to the T- interface of the dual motor controller 10 using copper wire to ensure reliable electrical connection. The T+ and T- interfaces of the dual motor controller 10 are disconnected during the testing phase.

[0040] Step S2: Initialize the dual motor controller 10. After the dual motor controller 10 is powered on, only the power transistor S3B is turned on. The microcontroller 400 initializes the current sampling circuit module 300 and configures the CANFD communication parameters. At this time, the dual motor controller 10 does not output power, and both the upper and lower bridge arms of the inverter are in the off state.

[0041] Step S3: Current acquisition of DC-DC power module 100 output. When DC-DC power module 100 is working normally, the output current flows through the current path formed by the copper wire. The DSP inside DC-DC power module 100 acquires the output current in real time through ADC, generates a current value of 1, and sends a current message through the CAN bus at a period of 10ms.

[0042] Step S4, Current acquisition by the dual motor controller 10. The current output by the DC-DC power module 100 flows through the U-phase interface and B-output terminal of the TM motor of the DC-DC power module 100 to form a current loop. The microcontroller 400 acquires this current through the current sampling circuit module 300, generates current value 2, and sends a current message through CANFD at a period of 10ms.

[0043] Step S5: Comparison and analysis by the host computer 500. The host computer 500 simultaneously receives current value 1 and current value 2 messages, extracts the current values, calculates the deviation value = |current value 1 - current value 2|, and compares it with a preset threshold.

[0044] Step S6: The host computer 500 makes a judgment and outputs. The host computer 500 determines whether the tested product is qualified based on the comparison results, displays the test results on the interface, and automatically saves the test data to the database.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A current verification device integrating a DC-DC dual-motor controller assembly, characterized in that, include: The DC-DC power module has its B+ output terminal connected to the U-phase interface of the TM motor of the dual-motor controller, and its B- output terminal connected to the T- interface of the dual-motor controller to form a closed current path. The DC-DC main control chip is integrated into the DC-DC power module, and its current sampling terminal is connected to the output circuit of the DC-DC power module for real-time acquisition of the output current of the DC-DC power module itself. A current sampling circuit module, wherein the sampling input terminal of the current sampling circuit module is connected to the U-phase interface of the TM motor of the dual motor controller and the T-interface of the dual motor controller respectively, and is used to collect the current in the closed current path; A microcontroller, which is built into a dual-motor controller, has its input terminal connected to the sampling output terminal of the current sampling circuit module; as well as The host computer is connected to both the DC-DC main control chip and the microcontroller.

2. The current verification device for the integrated DC-DC dual-motor controller assembly as described in claim 1, characterized in that, The B+ output terminal of the DC-DC power module is connected to the U-phase interface of the TM motor of the dual-motor controller via a first copper wire, and its B- output terminal is connected to the T- interface of the dual-motor controller via a second copper wire.

3. The current verification device for the integrated DC-DC dual-motor controller assembly as described in claim 2, characterized in that, The first and second copper wires are made of low-impedance, low-temperature-drift copper wires.

4. The current verification device for the integrated DC-DC dual-motor controller assembly as described in claim 1, characterized in that, The DC-DC main control chip uses a DSP processor.

5. The current verification device for the integrated DC-DC dual-motor controller assembly as described in claim 4, characterized in that, The DC-DC master control chip has a CAN communication interface, which is connected to the host computer via a CAN bus.

6. The current verification device for the integrated DC-DC dual-motor controller assembly as described in claim 1, characterized in that, The microcontroller used is a TC387 microcontroller.

7. The current verification device for the integrated DC-DC dual-motor controller assembly as described in claim 6, characterized in that, The microcontroller has a CANFD communication interface, which is connected to the host computer via a CANFD bus.

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