CN110412976B - A functional test system and test method for a motor controller PCBA board - Google Patents

Abstract

The invention relates to the field of motor controller testing systems, in particular to a motor controller PCBA board function testing system and a motor controller PCBA board function testing method, wherein the motor controller PCBA board function testing system comprises a motor controller PCBA board, a tool, a function testing adapter board, a loading module, a relay module, a programmable power supply, a signal generator, a CAN card, a desk-top universal meter, a switching power supply and a testing host computer; by adding the real-time status readback function of the loading module, the status switching times of each channel of the loading module are counted in real time, the health status of each relay is monitored, the problem of test failure caused by the fact that the relay is frequently switched to reach the service life is found and solved in time, and the test efficiency and the stability of a test system are improved.

Description

A functional test system and test method for a motor controller PCBA board

Technical Field

The present invention relates to the field of motor controller testing systems, in particular to a motor controller PCBA board function testing system and a testing method thereof.

Background technique

In order to ensure that the mass-produced motor controller PCBA board meets the preset functional requirements, it is necessary to perform a functional test (FCT) on it, that is, load appropriate excitation on the motor controller PCBA board, check the continuity of the motor controller PCBA board circuit, and measure whether its output response meets the requirements.

In the existing test system, there is a multimeter with relay modules and perfect measurement and display functions. A data collector is used to switch and control several relays to build different test environments. The above technologies are connected through the PCBA test adapter to realize the test system of the functional test of the motor controller PCBA board. However, the existing test system has the following shortcomings: Since the relay has a certain mechanical life and electrical life, the frequent switching of the relay on the test adapter makes it abnormal when it reaches its life in multiple tests, resulting in instability of the test system and test failure. The test system is relatively simple and the test function is relatively single. Some of the preset functional requirements of the mass-produced motor controller PCBA boards cannot be verified, and some defective motor controller PCBA boards with lack of soldering, cold soldering, short circuit and other phenomena are not screened out, which increases the rework and rework rate, and the intervention of subsequent test equipment and methods not only reduces the test efficiency, but also increases the test cost.

In summary, it is necessary to improve the test system.

Summary of the invention

In view of the above problems, an object of the present invention is to provide a functional testing system for a motor controller PCBA board. On the basis of the existing functional test, the test function is expanded to ensure that the preset functional requirements of the mass-produced motor controller PCBA board are verified to a large extent, improve the test accuracy, and can realize the monitoring of the health status of each relay, which is conducive to timely discovering and solving the problem of test failure caused by frequent switching of relays and reaching the end of their life, thereby improving the test efficiency and the stability of the test system.

Another object of the present invention is to provide a testing method of a functional testing system using the motor controller PCBA board.

The objective of the present invention is achieved through the following technical solutions:

A functional test system for a motor controller PCBA board includes a motor controller PCBA board, the functional test system also includes a tool, a functional test adapter board, a loading module, a relay module, a programmable power supply, a signal generator, a CAN card, a desktop multimeter, a switching power supply and a test host computer, wherein:

The functional test adapter board includes a connector, a resolver module, and a dip switch;

The connectors include C1, C2, C3, C4, C5, C6, C7, C8 and C9;

Connector C3 includes C30, C31 and C32, among which C30 and C31 are connectors of the motor controller PCBA board, C32 is a connector of the tooling, and C31 is also connected to the IGBT replacement module;

Connector C4 is a DB9 CAN connector, which is connected to the test host computer and connected to the motor controller PCBA board through connector C30;

The resolver module simulates the motor to generate a resolver signal, which is used to detect whether the resolver demodulation module on the motor controller PCBA board is abnormal; the resolver module includes two AD633R multipliers, and the pins Y1 and Y2 of the two multipliers receive the excitation signals EXCP and EXCN respectively; the pins X1 and X2 of one multiplier are fixedly connected to 2.5V and 0V, and the pins X1 and X2 of the other multiplier are controlled by a relay to connect to 2.5V and 0V or 0V and 2.5V, and the switching control is realized by a double-pole double-throw relay; after the multiplication operation by the multiplier, the pins W output the resolver signals SINP and COSP respectively, which are loaded to the motor controller PCBA board through the connector C30; the signals SINN and COSN are connected to 2.5V, and are also loaded to the motor controller PCBA board through the connector C30;

The pins on the button-on side of the dip switch are sequentially connected to the digital input channels of the loading module WP8024;

The loading module includes one WP8024 and multiple WP8027, and the communication end of the loading module is connected to the test host computer, wherein:

The WP8027 digital output channel is connected to connector C7 on the functional test adapter board and connected to the input drive end of the relay module through connector C8;

The WP8024 digital input channel and relay output channel are directly connected to the tooling through connector C7 on the function test adapter board and connector C32;

The relay module includes multiple relays, whose input drive end is connected to the connector C8 on the function test adapter board, and the output signal end is connected to the connector C9 on the function test adapter board, and the connector C9 is respectively connected to the connectors C1, C3, C5, C6 and the output voltage 3.3/5V module;

The program-controlled power supply is connected to the connector C1 on the functional test adapter board. The output voltage is controlled by the test host computer. The voltage signal sequentially powers the motor controller PCBA board through connectors C1, C9 and C30.

The switching power supply is connected to the connector C2 on the functional test adapter board to directly or indirectly power the devices used for functional testing, such as the relay module, the DCDC module and the IGBT replacement module;

The desktop multimeter is connected to the connector C5 on the functional test adapter board, and the connector C5 is connected to C9. Under the control of the test host computer, the voltage and current values of each test point connected to the desktop multimeter are measured;

The signal generator is connected to connector C6 on the functional test adapter board;

The CAN card is connected to the connector C4 on the functional test adapter board, and then connected to the motor controller PCBA board through the connector C30 to achieve communication between the test host computer and the microcontroller on the motor controller PCBA board;

The test host computer is connected to the programmable power supply, desktop multimeter, signal generator, loading module and CAN card;

The tooling includes multiple buttons and indicator lights, which are respectively connected to the digital input channels and relay output channels of the loading module WP8024 through connector C32.

The functional test adapter board also includes an output voltage 3.3/5V module.

The functional test adapter board also includes a DCDC module.

The functional test adapter board also includes an IGBT replacement module, which is used to replace the real three-phase bridge IGBT module inside the motor controller and is connected to the motor controller PCBA board through the connector C31 on the functional test adapter board.

The WP8024 digital input channel is also connected to the DIP switch.

The program-controlled power supply adopts a GWPSP-405 programmable switching DC power supply, and the output voltage is controlled to 13V by default.

The CAN card uses the Kvaser Leaf Light V2 CAN analyzer.

The signal generator adopts GWAFG-2000 series signal generator.

A testing method of a functional testing system of a motor controller PCBA board using the above method comprises the following steps:

1. Connect the device and initialize it;

2. Test that the host computer controls the signal generator to output a specific waveform, and load it to the motor controller PCBA board through connectors C6, C9 and C30. If the motor controller PCBA board verifies that the loaded waveform is consistent with the set waveform, the motor controller PCBA board enters the test mode; otherwise, the test fails and the test is terminated;

3. Start the test, press the tooling start test button or start the test through the test host computer;

4. The test host computer issues test file instructions in sequence, performs input and output control on the functional test system, builds various functional test environments and performs tests; at the same time, the feedback values from the desktop multimeter and the microcontroller on the motor controller PCBA board to the test host computer are recorded in the test file, and the feedback values are compared with the theoretical values: if the feedback values match the theoretical values or are within the specified range of the theoretical values, the test result of this item is recorded as passed, otherwise it is recorded as failed;

5. If the test results of each item in the test file are passed, the motor controller PCBA board is qualified, otherwise, the motor controller PCBA board is unqualified; continue to wait and start the test again;

6. During the test, the test host computer monitors the signal input and output channel status of each loading module in real time, and counts the state switching times of the loading module WP8024 digital input, relay output channel and WP8027 digital output channel in real time, that is, the usage times of each relay controlled by the loading module, and displays it in real time on the test interface;

The number of times each relay is used is compared with the service life of the relay. When the number of times at least one relay is used is greater than or equal to the service life, it is prompted that the relay controlled by a channel of a loading module at a certain address has reached its service life and the test is terminated, otherwise the test continues.

In step 4, the functional test also includes testing of the resolver demodulation module of the motor controller PCBA board, including the following steps:

4.1. The test host computer sends a command to read the resolver value to the single-chip microcomputer of the motor controller PCBA board in the form of CAN messages through connectors C4 and C30. The single-chip microcomputer outputs excitation source signals EXCP and EXCN, and inputs the signal to the resolver module of the functional test adapter board through connector C30. The resolver output signal is transmitted to the motor controller PCBA board by connector C30, and the output resolver value is calculated by the resolver demodulation module of the motor controller PCBA board. Finally, the output resolver value is fed back to the test host computer by the single-chip microcomputer through connector C4;

4.2. The test host computer records and compares the resolver value with the theoretical value. If the resolver value is consistent with the theoretical value or is within the specified range of the theoretical value, the test result of this item is recorded as passed, otherwise it is recorded as failed.

The beneficial effects of the present invention are:

1. Compared with the existing test system, the functional test system and test method of the motor controller PCBA board of the present invention, by adding the real-time state readback function of the signal input and output channels of the loading module, counts the number of state switching of each signal input and output channel of the loading module in real time, that is, the number of times each relay controlled by the loading module is used, thereby realizing the monitoring of the health status of each relay. It is conducive to timely discovering and solving the problem of test failure caused by frequent switching of relays reaching the end of their life, and improves the test efficiency and the stability of the test system.

2. Compared with the existing test system, the functional testing method and system of the motor controller PCBA board of the present invention have greatly expanded testing functions, including simulating a motor to generate a resolver signal based on a resolver module, and controlling the relay switching by a loading module to realize the functional test of the resolver demodulation module of the motor controller PCBA board, thereby ensuring to a large extent that the preset functional requirements of the mass-produced motor controller PCBA boards are verified, improving the test accuracy, avoiding unnecessary rework testing, and avoiding the intervention of subsequent testing equipment and methods, thereby improving test efficiency and reducing test costs.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of a functional test system for a motor controller PCBA board of the present invention;

FIG2 is a pin diagram of connectors C1 to C6 according to an embodiment of the present invention;

FIG3 is a pin diagram of a connector C7 according to an embodiment of the present invention;

4A and 4B are pin diagrams of connectors C8 and C9 according to an embodiment of the present invention;

FIG. 5 is a circuit schematic diagram of a resolver module in an embodiment of the present invention.

Detailed ways

The specific implementation of the present invention is further described in detail below in conjunction with the drawings and examples.

A functional test system for a motor controller PCBA board, wherein the functional test is used to check the continuity of the motor controller PCBA board circuit and to measure whether the electrical waveform of each network node thereof meets expectations.

As shown in Figure 1, a functional test system for a motor controller PCBA board includes a motor controller PCBA board, a tooling, a functional test adapter board, a loading module, a relay module, a programmable power supply, a signal generator, a CAN card, a desktop multimeter, a switching power supply and a test host computer, wherein:

The functional test adapter board includes a connector, a resolver module, an output voltage 3.3/5V module, a dip switch, a DCDC module and an IGBT replacement module.

The functional test adapter board is used to connect the motor controller PCBA board, desktop multimeter, signal generator and other devices together to ensure normal communication between devices.

As shown in FIGS. 2 , 3 , 4A and 4B , the connectors include C1 , C2 , C3 , C4 , C5 , C6 , C7 , C8 and C9 .

Connector C3 includes C30, C31 and C32, among which C30 and C31 are connectors of the motor controller PCBA board, C32 is a connector of the tooling, and C31 is also connected to the IGBT replacement module.

Connector C4 is a DB9 CAN connector, which is connected to the test host computer and connected to the motor controller PCBA board through connector C30 to ensure network communication between the test host computer and the motor controller PCBA board.

As shown in Figure 5, the resolver module simulates the motor to generate a resolver signal, which is used to detect whether the resolver demodulation module on the motor controller PCBA board is abnormal. The resolver module includes two AD633R multipliers, and the pins Y1 and Y2 of the two multipliers receive the excitation signals EXCP and EXCN respectively; the pins X1 and X2 of one multiplier are fixedly connected to 2.5V and 0V, and the pins X1 and X2 of the other multiplier are connected to 2.5V and 0V or 0V and 2.5V by relay control, and the switching control is realized by a double-pole double-throw relay; after the multiplication operation of the multiplier, the pin W outputs the resolver signals SINP and COSP respectively, which are loaded to the motor controller PCBA board through the connector C30; the signals SINN and COSN are connected to 2.5V, and are also loaded to the motor controller PCBA board through the connector C30.

The pins on the button side of the DIP switch are sequentially connected to the digital input channels of the loading module WP8024. When debugging the functional test system, the DIP switch provides signal input for the loading module WP8024 to start the test, which is used to replace the tooling button signal input during the actual test.

The DCDC module includes two voltage conversion modules, which provide 48V, 15V and 2.5V voltage inputs for the IGBT replacement module and the resolver module respectively.

The IGBT replacement module is used to replace the real three-phase bridge IGBT module inside the motor controller, and is connected to the motor controller PCBA board through the connector C31 on the functional test adapter board. The switching power supply is connected to the DCDC module to generate a 48V power supply for three-phase bridge bus voltage simulation.

The output voltage 3.3/5V module is used to realize the pull-up and pull-down of the signal, as well as the given voltage input.

The loading module includes one WP8024 and multiple WP8027, and the communication end of the loading module is connected to the test host computer, wherein:

The WP8027 digital output channel is connected to connector C7 on the functional test adapter board and connected to the input drive end of the relay module through connector C8.

The WP8024 digital input channel and relay output channel are directly connected to the tooling through connector C7 on the function test adapter board and connector C32. To facilitate debugging, the WP8024 digital input channel is also connected to the DIP switch.

The loading module WP8027 makes corresponding switch actions to switch the relay according to the test host computer command, loads the corresponding switch quantity, voltage and resistance type signals to the motor controller PCBA board, and obtains the environment of the signal measured by the desktop multimeter, so that the desktop multimeter is in working state or in non-working state. The loading module WP8024 displays the reserved actions and test status of the functional test system on the tooling by receiving the test host computer command or the tooling button action signal.

The relay module includes multiple relays, whose input drive end is connected to connector C8 on the function test adapter board, and the output signal end is connected to connector C9 on the function test adapter board. Connector C9 is respectively connected to connectors C1, C3, C5, C6 and the output voltage 3.3/5V module.

The program-controlled power supply is connected to connector C1 on the functional test adapter board. The output voltage is controlled by the test host computer. The voltage signal sequentially powers the motor controller PCBA board through connectors C1, C9 and C30.

The switching power supply is connected to the connector C2 on the functional test adapter board, and directly or indirectly supplies power to devices used for functional testing, such as relay modules, DCDC modules, and IGBT replacement modules. The output voltage of the switching power supply is 12V.

The desktop multimeter is connected to connector C5 on the functional test adapter board, and connector C5 is connected to C9. Under the control of the test host computer, the voltage and current values of each test point connected to the desktop multimeter are measured.

The signal generator is connected to the connector C6 on the functional test adapter board, and the test host computer controls the generation of a specific waveform to put the motor controller PCBA board into the test mode.

The CAN card is connected to the connector C4 on the functional test adapter board, and then connected to the motor controller PCBA board through the connector C30 to realize the communication between the test host computer and the microcontroller on the motor controller PCBA board.

The test host computer is connected to the programmable power supply, desktop multimeter, signal generator, loading module and CAN card through hardware interfaces such as RS232 and RS485.

The tooling includes multiple buttons and indicator lights, which are respectively connected to the digital input channel and relay output channel of the loading module WP8024 through connector C32, and are respectively related to the startup test and display the test status of the functional test system, including test start, end, and test in progress.

Preferably, the relay module adopts a plurality of 16-way relay modules, that is, one relay module includes 16 relays.

Preferably, the programmable power supply adopts a GWPSP-405 programmable switching DC power supply, and the output voltage is controlled to 13V by default.

Preferably, the CAN card adopts Kvaser Leaf Light V2 CAN analyzer.

Preferably, the signal generator adopts a GWAFG-2000 series signal generator.

Preferably, the specific waveform frequency of the motor controller PCBA board entering the test mode is 1.7 (+/- 0.1) kHz, and the duty cycle is 37% (+/- 1%);

Preferably, the desktop multimeter is an Agilent 33401A digital multimeter.

Preferably, the single chip microcomputer is an Infineon-AURIX-TC277 single chip microcomputer.

Preferably, the test host computer uses the software LabVIEW to create the test interface, which mainly has the following functions:

1. Start the test, run the functional test system test program, perform input and output control on the functional test system, and pause or terminate the test;

2. Real-time monitoring of the signal input and output channel status of the loading module;

3. Real-time display of the operation information of the functional test system;

4. Based on the signal input and output channel status readback function of the loading module, the number of state switching of each signal input and output channel of the loading module is counted in real time, thereby realizing the monitoring of the health status of each relay.

A testing method of a functional testing system of a motor controller PCBA board of the present invention comprises the following steps:

1. Connect the device and initialize it;

2. Test that the host computer controls the signal generator to output a specific waveform, which is loaded into the motor controller PCBA board through connectors C6, C9 and C30. If the motor controller PCBA board verifies that the loaded waveform is consistent with the set waveform, the motor controller PCBA board enters the test mode; otherwise, the test fails and the test is terminated.

3. Start the test by pressing the start test button on the tooling or starting the test through the test host computer.

4. The test host computer issues test file instructions in sequence, performs input and output control on the functional test system, builds various functional test environments and performs tests. At the same time, the feedback values from the desktop multimeter and the microcontroller on the motor controller PCBA board to the test host computer are recorded in the test file, and the feedback values are compared with the theoretical values: if the feedback values match the theoretical values or are within the specified range of the theoretical values, the test result of this item is recorded as passed, otherwise it is recorded as failed.

Preferably, in step 4, the functional test also includes testing of the resolver demodulation module of the motor controller PCBA board, including the following steps:

4.1. The test host computer sends a command to read the resolver value to the microcontroller of the motor controller PCBA board in the form of CAN messages through connectors C4 and C30. The microcontroller outputs excitation source signals EXCP and EXCN, and inputs the signal to the resolver module of the functional test adapter board through connector C30. The resolver output signal is loaded to the motor controller PCBA board through connector C30, and the output resolver value is calculated by the resolver demodulation module of the motor controller PCBA board. Finally, the output resolver value is fed back to the test host computer by the microcontroller through connector C4;

4.2. The test host computer records and compares the resolver value with the theoretical value. If the resolver value is consistent with the theoretical value or is within the specified range of the theoretical value, the test result of this item is recorded as passed, otherwise it is recorded as failed.

Preferably, the single chip microcomputer is an Infineon-AURIX-TC277 single chip microcomputer.

5. If the test results of each item in the test file are passed, the motor controller PCBA board is qualified, otherwise, the motor controller PCBA board is unqualified; continue to wait and start the test again.

6. During the test, the test host computer monitors the signal input and output channel status of each loading module in real time, and counts the number of state switching of the loading module WP8024 digital input, relay output channel and WP8027 digital output channel, that is, the number of times each relay controlled by the loading module is used, and displays it in real time on the test interface.

The number of times each relay is used is compared with the service life of the relay. When the number of times at least one relay is used is greater than or equal to the service life, it is prompted that the relay controlled by a channel of a loading module at a certain address has reached its service life and the test is terminated, otherwise the test continues.

The above is a specific description of the embodiments of the present invention, but the invention is not limited to the above embodiments. Any equivalent modifications or substitutions and improvements made under the spirit and principle of the present invention are included in the scope defined by the claims of this application.

Claims (9)

1. The test method of the function test system by using the motor controller PCBA board comprises the motor controller PCBA board, a tool, a function test adapter board, a loading module, a relay module, a program-controlled power supply, a signal generator, a CAN card, a desk-top universal meter, a switching power supply and a test upper computer, wherein,

The function test adapter plate comprises a connector, a rotary module and a dial switch;

the connector comprises C1, C2, C3, C4, C5, C6, C7, C8 and C9;

The connector C3 comprises C30, C31 and C32, wherein C30 and C31 are connectors of a PCBA board of the motor controller, C32 is a connector of a tool, and C31 is also connected with an IGBT substitution module;

the connector C4 is a DB9 type CAN connector, is connected with the test upper computer and is connected with the PCBA board of the motor controller through the connector C30;

The rotary transformer module simulates a motor to generate a rotary transformer signal and is used for detecting whether a rotary transformer demodulation module on a PCBA board of a motor controller is abnormal or not; the rotation module comprises two multipliers of AD633R, and pins Y1 and Y2 of the two multipliers respectively receive excitation signals EXCP and EXCN; pins X1 and X2 of one multiplier are fixedly connected with 2.5V and 0V, pins X1 and X2 of the other multiplier are controlled by a relay to be connected with 2.5V and 0V or 0V and 2.5V, and switching control is realized by a double-pole double-throw relay; after multiplication operation of the multiplier, the pins W respectively output a rotation-varying signal SINP and a COSP, and the rotation-varying signals SINP and COSP are loaded to a PCBA board of the motor controller through a connector C30; signals SINN and COSN are connected with 2.5V and are also loaded to the PCBA board of the motor controller through the connector C30;

The pin on one side of the key on of the dial switch is sequentially connected with a digital quantity input channel of the loading module WP 8024;

The loading module comprises 1 WP8024 and a plurality of WPs 8027, the communication end of the loading module is connected with the testing upper computer, wherein,

The WP8027 digital quantity output channel is connected to a connector C7 on the functional test adapter plate and is connected with the input driving end of the relay module through a connector C8;

the WP8024 digital quantity input channel and the relay output channel are directly connected with the connector C32 to the tool through the connector C7 on the functional test adapter plate;

The relay module comprises a plurality of relays, the input driving ends of the relays are connected with a connector C8 on the functional test adapter plate, the output signal ends of the relays are connected to a connector C9 on the functional test adapter plate, and the connectors C9 are respectively connected with connectors C1, C3, C5 and C6 and a module with output voltage of 3.3/5V;

the programmable power supply is connected to a connector C1 on the functional test adapter plate, the test upper computer controls output voltage, and voltage signals sequentially supply power to the motor controller PCBA through the connectors C1, C9 and C30;

The switching power supply is connected with a connector C2 on the functional test adapter plate and directly or indirectly supplies power for equipment used for functional test, wherein the equipment is composed of a relay module, a DCDC module and an IGBT substitution module;

The desk-top universal meter is connected to a connector C5 on the functional test adapter plate, the connector C5 is connected with a connector C9, and under the control of the test upper computer, the voltage and current values of each test point of the desk-top universal meter are measured;

The signal generator is connected to a connector C6 on the functional test adapter plate;

The CAN card is connected with a connector C4 on the functional test adapter plate and then connected to the motor controller PCBA board through a connector C30, so that the communication between the test upper computer and the singlechip on the motor controller PCBA board is realized;

the test upper computer is connected with the programmable power supply, the desk-top universal meter, the signal generator, the loading module and the CAN card;

The tool comprises a plurality of buttons and indicator lamps, wherein the buttons and the indicator lamps are respectively connected to a digital quantity input channel and a relay output channel of the loading module WP8024 through connectors C32;

The method is characterized in that: the method comprises the following steps:

1) Connecting equipment, and initializing the equipment;

2) The test upper computer control signal generator outputs specific waveforms, the specific waveforms are loaded to the motor controller PCBA through connectors C6, C9 and C30, and if the motor controller PCBA verifies that the loaded waveforms are consistent with the set waveforms, the motor controller PCBA enters a test mode; otherwise, the test fails and the test is terminated;

3) Starting a test, namely pressing a tool starting test button or starting the test through a test upper computer;

4) Sequentially sending out test file instructions by the test upper computer, controlling input and output of the function test system, building various function test environments and testing; meanwhile, the feedback values of the desk-top multimeter and the singlechip on the PCBA board of the motor controller to the test upper computer are recorded in the test file, and the feedback values are compared with theoretical values: if the feedback value is consistent with the theoretical value or is within the range specified by the theoretical value, the test result of the item is marked as passing, otherwise, the test result is marked as failing;

5) If the test result of each item in the test file is passed, the motor controller PCBA board is qualified, otherwise, the motor controller PCBA board is unqualified; continuously waiting for restarting the test;

6) In the test process, the test upper computer monitors the states of the signal input and output channels of each loading module in real time, counts the state switching times of the digital quantity input of the loading module WP8024, the state switching times of the relay output channel and the state switching times of the digital quantity output channel of the WP8027, namely the using times of each relay controlled by the loading module, and displays the using times on a test interface in real time;

comparing the use times of each relay with the service life of the relay, and when the use times of at least one relay are larger than or equal to the service life, prompting that the relay controlled by a certain channel of the loading module at a certain address has reached the service life, and ending the test, otherwise, continuing to execute the test.

2. The test method of claim 1, wherein: in step 4), the functional test further includes a test of a rotary demodulation module of the PCBA board of the motor controller, including the following steps:

4.1 The testing upper computer sends a rotation value reading instruction to a singlechip of a motor controller PCBA board in a CAN message mode through connectors C4 and C30, the singlechip outputs excitation source signals EXCP and EXCN, signals are input to a rotation module of a function testing adapter board through the connector C30, rotation output signals are transmitted to the motor controller PCBA board through the connector C30, the rotation demodulation module of the motor controller PCBA board calculates an output rotation value, and finally the singlechip feeds the output rotation value back to the testing upper computer through the connector C4;

4.2 And (3) recording and comparing the rotation variation value with the theoretical value by the test upper computer, if the rotation variation value is consistent with the theoretical value or is within the range specified by the theoretical value, recording the test result of the test upper computer as passing, otherwise recording the test result as failing.

3. The test method of claim 1, wherein: the function test adapter plate also comprises an output voltage 3.3/5V module.

4. The test method of claim 1, wherein: the function test adapter plate also comprises a DCDC module.

5. The test method of claim 1, wherein: the function test adapter plate further comprises an IGBT replacing module, wherein the IGBT replacing module is used for replacing a real three-phase bridge IGBT module in the motor controller and is connected with the motor controller PCBA through a connector C31 on the function test adapter plate.

6. The test method of claim 1, wherein: the WP8024 digital quantity input channel is also connected with a dial switch.

7. The test method of claim 1, wherein: the programmable power supply adopts GWPSP-405 programmable switch direct current power supply, and the output voltage is controlled to be 13V by default.

8. The test method of claim 1, wherein: the CAN card adopts KVASER LEAF LIGHT V CAN analyzer.

9. The test method of claim 1, wherein: the signal generator adopts GWAFG-2000 series signal generators.