CN110412976A - A functional testing system and testing method of a motor controller PCBA board - Google Patents

Abstract

The invention relates to the field of motor controller test systems, in particular to a function test system and a test method for a motor controller PCBA board, and a function test system for a motor controller PCBA board, including a motor controller PCBA board, tooling, and a function test switch. Connecting board, loading module, relay module, program-controlled power supply, signal generator, CAN card, desktop multimeter, switching power supply and test host computer, the function test system and test method of the motor controller PCBA board of the present invention, based on the resolver module Simulate the motor to generate the resolver signal, and realize the function test of the resolver demodulation module of the motor controller PCBA board through the control of the relay; by adding the real-time status readback function of the loading module, the status switching of each channel of the loading module can be counted in real time The number of times realizes the monitoring of the health status of each relay, which is beneficial to timely discover and solve the problem of test failure caused by frequent switching of relays reaching the end of life, and improves the test efficiency and test system stability.

Description

A functional testing system and testing method of a motor controller PCBA board

technical field

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

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 (Function Test, FCT), that is, to load the motor controller PCBA board with a suitable stimulus, and check the wiring of the motor controller PCBA board. On and off, measure whether the output response meets the requirements.

In the existing test system, there are multimeters that use relay modules and perfect measurement and display functions. Through the data collector, a number of relays are switched and controlled to build different test environments. The above technologies are connected through the PCBA test adapter board. Test system for functional testing of motor controller PCBA boards. However, the existing test system has the following disadvantages: because the relay has a certain mechanical life and electrical life, in many tests, the frequent switching of the relay on the test adapter board makes the relay abnormal when it reaches its life, which leads to the test The system is unstable and the test failed. The test system is simpler, and the test function is more simplistic. Part of the preset functional requirements of mass-produced motor controller PCBA boards cannot be verified, and some bad motor controller PCBA boards with phenomena such as lack of soldering, virtual soldering, and short circuit have not been screened out, increasing rework and rework rates, and subsequent The intervention of test equipment and methods not only reduces test efficiency, but also increases test cost.

In summary, the test system needs to be improved.

Contents of the invention

In view of the above problems, an object of the present invention is to provide a functional test system of a motor controller PCBA board, on the basis of the existing functional test, the test function is expanded, and the motor controller PCBA board of mass production is guaranteed to a large extent. The preset functional requirements are verified, which improves the accuracy of the test, and can monitor the health status of each relay, which is conducive to timely discovery and resolution of the test failure caused by frequent switching of relays reaching the end of life, and improves the test efficiency. and test system stability.

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

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

A functional testing system of a motor controller PCBA board, including a motor controller PCBA board, the functional testing system also includes a tooling, a functional testing adapter board, a loading module, a relay module, a program-controlled power supply, a signal generator, a CAN card, Desktop multimeter, switching power supply and test host computer, among which,

The functional test adapter board includes connectors, resolver modules, and DIP switches;

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

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

Connector C4 is a DB9 type 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, and is used to detect whether the resolver demodulation module on the PCBA board of the motor controller is abnormal; the resolver module includes two multipliers of AD633R, and the leads of the two multipliers The pins Y1 and Y2 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, the switching control is realized by a double-pole double-throw relay; after multiplied by 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 is connected to 2.5V, and is also loaded to the motor controller PCBA board through connector C30;

The pins on the button on side of the DIP switch are sequentially connected to the digital input channel of the loading module WP8024;

The loading module includes 1 WP8024 and multiple WP8027, and the communication terminal of the loading module is connected with the test host computer, wherein,

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

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

The relay module includes a plurality of relays, the input drive end of which is connected to the connector C8 on the function test adapter board, 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 and C3 , C5, C6 and the output voltage 3.3/5V module are connected;

The program-controlled power supply is connected to the connector C1 on the function test adapter board, and the output voltage is controlled by the test host computer, and the voltage signal sequentially supplies power to 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, directly or indirectly supplying power to devices used for functional testing such as relay modules, DCDC modules and IGBT replacement modules;

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, measure the voltage and current value of each test point connected to the desktop multimeter;

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

The CAN card is connected to the connector C4 on the function test adapter board, and then connected to the motor controller PCBA board through the connector C30, so as to realize the communication between the test host computer and the single-chip microcomputer on the motor controller PCBA board;

Test the host computer to connect the program-controlled power supply, desktop multimeter, signal generator, loading module and CAN card;

The tooling includes multiple buttons and indicator lights, all of which are respectively connected to the digital input channel and relay output channel of the loading module WP8024 through the 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 function 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 through the connector C31 on the function test adapter board and the motor controller PCBA board connect.

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

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

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

The signal generator adopts GWAFG-2000 series signal generator.

A method of testing utilizing the functional testing system of the motor controller PCBA board, the method may further comprise the steps:

1. Connect the device and initialize the device;

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

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

4. Test the host computer to issue test file instructions sequentially, control the input and output of the functional test system, build various functional test environments and conduct tests; at the same time, record the direction test of the desktop multimeter and the single-chip microcomputer on the PCBA board of the motor controller in the test file The feedback value of the host computer, and compare the feedback value with the theoretical value: if the feedback value is consistent with the theoretical value or within the specified range of the theoretical value, 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 for the test to start again;

6. During the test process, 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 times of the loading module WP8024 digital input, relay output channel and WP8027 digital output channel in real time, which is the loading module control The number of times each relay is used and displayed on the test interface in real time;

Compare the number of times of use of each relay with the service life of the relay. When at least one relay is used that is greater than or equal to the service life, it will prompt that the relay controlled by a certain channel of the loading module at a certain address has reached the service life and terminate the service life. test, otherwise continue with the test.

In step 4, the functional test also includes the test 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 through the connectors C4 and C30 in the form of CAN messages. The single-chip microcomputer outputs the excitation source signals EXCP and EXCN, and the signal is input to the The resolver module of the function test adapter board, the resolver output signal is transmitted to the motor controller PCBA board by the connector C30, the output resolver value is calculated by the resolver demodulation module of the motor controller PCBA board, and finally the single chip is connected to The converter C4 feeds back the output resolver value to the test host computer;

4.2. Test the records of the host computer and compare the resolver value with the theoretical value. If the resolver value is consistent with the theoretical value or 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 the test method thereof of the motor controller PCBA board of the present invention, by adding the signal input of the loading module and the real-time state readback function of the output channel, the real-time statistics of the loading module The number of state switching times of each signal input and output channel is the number of times of use of each relay controlled by the loading module, and then realizes the monitoring of the health status of each relay. It is beneficial to timely discover and solve the problem of test failure caused by frequent switching of relays reaching the service life, and improves the test efficiency and the stability of the test system.

2. Compared with the existing test system, the function test method and system of the motor controller PCBA board of the present invention have greatly expanded test functions, including generating resolver signals based on a resolver module simulating the motor, and loading the module For relay switching control, the function test of the resolver demodulation module of the motor controller PCBA board is realized, and the preset functional requirements of the mass-produced motor controller PCBA board are verified to a large extent, and the accuracy of the test is improved. Necessary rework testing, while avoiding the intervention of subsequent testing equipment and methods, improving testing efficiency and reducing testing costs.

Description of drawings

Fig. 1 is the functional test system structural representation of motor controller PCBA board of the present invention;

Fig. 2 is the pin figure of connector C1～C6 in the embodiment of the present invention;

Fig. 3 is the pin figure of connector C7 in the embodiment of the present invention;

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

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

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

A function test system of a motor controller PCBA board, the function test is used to check whether the circuit of the motor controller PCBA board is on or off, and to measure whether the electrical waveforms of its network nodes meet expectations.

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

The functional test adapter board includes connectors, resolver modules, output voltage 3.3/5V modules, DIP switches, DCDC modules and IGBT replacement modules, among which,

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

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

The connector C3 includes C30, C31 and C32, wherein, C30 and C31 are the connectors of the motor controller PCBA board, C32 is the connector of the tooling, and C31 is also connected with the IGBT replacement module.

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

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

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

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 function test adapter board, and the switching power supply is connected to the DCDC module to generate a 48V power supply. Used 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 signals, and the input of a given voltage.

The loading module includes 1 WP8024 and multiple WP8027, and the communication terminal of the loading module is connected with the test host computer, wherein,

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

WP8024 digital input channels and relay output channels are directly connected to the tooling with connector C32 via connector C7 on the function test adapter board. For the convenience of debugging, the digital input channel of WP8024 is also connected with the DIP switch.

The loading module WP8027 makes the corresponding switching action according to the test host computer command to switch the relay, load the corresponding switching value, voltage and resistance signal to the motor controller PCBA board, and obtain the environment of the signal measured by the desktop multimeter, so that the desktop multimeter In working state or in non-working state. The loading module WP8024 displays the reserved action and test status of the functional test system on the tooling by receiving the command from the test host computer or the action signal of the tooling button.

The relay module includes a plurality of relays, the input drive end of which is connected to the connector C8 on the function test adapter board, 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 and C3 , C5, C6 and the output voltage 3.3/5V module are connected.

The program-controlled power supply is connected to the connector C1 on the function test adapter board, and the output voltage is controlled by the test host computer, and the voltage signal sequentially supplies power to 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 equipment 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 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, measure the voltage and current value of each test point connected to the desktop multimeter.

The signal generator is connected to the connector C6 on the functional test adapter board, and the test host computer controls to generate a specific waveform to make the motor controller PCBA board enter the test mode.

The CAN card is connected to the connector C4 on the function test adapter board, and then connected to the motor controller PCBA board through the connector C30, so as to realize the communication between the test host computer and the single-chip microcomputer on the motor controller PCBA board.

The test host computer is connected to the program-controlled power supply, desktop multimeter, signal generator, loading module and CAN card through RS232, RS485 and other hardware interfaces.

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 the connector C32, which are respectively related to the start-up test and display the test status of the functional test system, including test start and end , The test is in progress.

Preferably, the relay module adopts multiple 16-way relay modules, that is, one relay module contains 16 relays.

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

Preferably, the CAN card uses a Kvaser Leaf Light V2 CAN analyzer.

Preferably, the signal generator is 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 Agilent33401A digital multimeter.

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

Preferably, the test host computer adopts software LabVIEW to make the test interface, which mainly has the following effects:

1. Start the test, run the test program of the functional test system, control the input and output of the functional test system, and suspend or terminate the test;

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

3. Display the running information of the functional test system in real time;

4. Based on the status readback function of the signal input and output channels of the loading module, the status switching times of each signal input and output channel of the loading module are counted in real time, and then the health status of each relay is monitored.

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

1. Connect the device and initialize the device;

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

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

4. The test host computer sends test file instructions in sequence, controls the input and output of the functional test system, builds various functional test environments and conducts tests. At the same time, record the feedback value of the desktop multimeter and the single-chip microcomputer on the motor controller PCBA board to the test host computer in the test file, and compare the feedback value with the theoretical value: if the feedback value matches 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, in step 4, the functional test also includes the test 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 through the connectors C4 and C30 in the form of CAN messages. The single-chip microcomputer outputs the excitation source signals EXCP and EXCN, and the signal is input to the The resolver module of the function test adapter board, the resolver output signal is loaded to the motor controller PCBA board by the connector C30, the output resolver value is calculated through the resolver demodulation module of the motor controller PCBA board, and finally the single chip is connected to The converter C4 feeds back the output resolver value to the test host computer;

4.2. Test the records of the host computer and compare the resolver value with the theoretical value. If the resolver value is consistent with the theoretical value or 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 for the test to start again.

6. During the test process, 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 times of the loading module WP8024 digital input, relay output channel and WP8027 digital output channel in real time, which is the loading module control The number of times each relay is used and displayed on the test interface in real time.

Compare the number of times of use of each relay with the service life of the relay. When at least one relay is used that is greater than or equal to the service life, it will prompt that the relay controlled by a certain channel of the loading module at a certain address has reached the service life and terminate the service life. test, otherwise continue with the test.

The above is a specific description of the embodiments of the present invention, but the invention of the present invention is not limited to the above-mentioned embodiments. Any equivalent modifications or replacements and improvements made on the premise of the spirit and principles of the present invention are included within the scope defined by the claims of the present application.

Claims (10)

1. a kind of function test system of electric machine controller PCBA board, including electric machine controller PCBA board, it is characterised in that:

The function test system further includes tooling, functional test pinboard, loading module, relay module, programmable power supply, letter Number generator, CAN card, desk-top multimeter, Switching Power Supply and test host computer, wherein

It include connector, rotation change module, toggle switch on functional test pinboard；

The connector includes C1, C2, C3, C4, C5, C6, C7, C8 and C9；

Connector C3 includes C30, C31 and C32, wherein C30 and C31 is the connector of electric machine controller PCBA board, and C32 is work The connector of dress, C31 are also connect with IGBT alternative module；

Connector C4 is DB9 type CAN connector, connect with test host computer, passes through connector C30 and electric machine controller PCBA Plate is connected；

The rotation becomes module simulation motor and generates rotation varying signal, becomes demodulation module for detecting the rotation in electric machine controller PCBA board Whether exception is had；The rotation becomes the multiplier that module includes two AD633R, and pin Y1, Y2 of two multipliers are received respectively to be swashed Encourage signal EXCP and EXCN；Pin X1, X2 of one multiplier fixed access 2.5V and 0V, the pin X1 of another multiplier, X2 controls access 2.5V and 0V or 0V and 2.5V by relay, and switching control is realized by a dpdt relay；Pass through After multiplier multiplication operations, pin W exports rotation varying signal SINP and COSP respectively, is loaded onto motor control by connector C30 Device PCBA board；Signal SINN and COSN meet 2.5V, are loaded onto electric machine controller PCBA board also by connector C30；

The pin of the side key on of the toggle switch is successively connected with the digital quantity input channel of loading module WP8024；

The loading module includes 1 WP8024 and multiple WP8027, and the communication terminal of loading module is connected with test host computer, In,

WP8027 digital output channel is connected to the connector C7 on functional test pinboard, passes through connector C8 and relay The input driving end of module is connected；

WP8024 digital quantity input channel, relay output channel via the connector C7 on functional test pinboard, directly with Connector C32 is connected to tooling；

Relay module includes multiple relays, and input driving end is connected with the connector C8 on functional test pinboard, defeated Signal end is connected to the connector C9 on functional test pinboard out, connector C9 respectively with connector C1, C3, C5, C6 and Output voltage 3.3/5V module is connected；

Programmable power supply is connected to the connector C1 on functional test pinboard, by test PC control output voltage, voltage letter Number sequence is that electric machine controller PCBA board is powered by connector C1, C9 and C30；

Switching Power Supply is connected with the connector C2 on functional test pinboard, is directly or indirectly relay module, DCDC The equipment for functional test such as module and IGBT alternative module is powered；

Desk-top multimeter is connected to the connector C5 on functional test pinboard, and connector C5 is connected with C9, in test host computer Control under, measurement accesses voltage, the current value of the desk-top each test point of multimeter；

Signal generator is connected to the connector C6 on functional test pinboard；

CAN card is connected with the connector C4 on functional test pinboard, then is connected to electric machine controller PCBA by connector C30 Plate realizes the communication of the single-chip microcontroller in test host computer and electric machine controller PCBA board；

Test host computer connection programmable power supply, desk-top multimeter, signal generator, loading module and CAN card；

Tooling includes multiple buttons and indicator light, and the digital quantity of loading module WP8024 is connected respectively to by connector C32 Input channel and relay output channel.

2. the function test system of electric machine controller PCBA board as described in claim 1, it is characterised in that: functional test switching It further include output voltage 3.3/5V module on plate.

3. the function test system of electric machine controller PCBA board as described in claim 1, it is characterised in that: functional test switching It further include DCDC module on plate.

4. the function test system of electric machine controller PCBA board as described in claim 1, it is characterised in that: functional test switching It further include IGBT alternative module on plate, the IGBT alternative module is used to substitute true three-phase bridge IGBT inside electric machine controller Module, and connect by the connector C31 on functional test pinboard with electric machine controller PCBA board.

5. the function test system of electric machine controller PCBA board as described in claim 1, it is characterised in that: WP8024 digital quantity Input channel is also connected with toggle switch.

6. the function test system of electric machine controller PCBA board as described in claim 1, it is characterised in that: the programmable power supply Using GWPSP-405 programmable switch DC power supply, output voltage default control is 13V.

7. the function test system of electric machine controller PCBA board as described in claim 1, it is characterised in that: the CAN card is adopted With Kvaser Leaf Light V2 CAN analyzer.

8. the function test system of electric machine controller PCBA board as described in claim 1, it is characterised in that: the signal occurs Device uses GWAFG-2000 series of signals generator.

9. a kind of test method using the function test system of electric machine controller PCBA board described in one of claim 1~8, It is characterized by: the described method comprises the following steps:

1, equipment, equipment initialization are connected；

2, test PC control signal generator output specific waveforms are loaded into motor control by connector C6, C9 and C30 Device PCBA board processed, if electric machine controller PCBA board examines the Loaded contact analysis consistent with the waveform of setting, electric machine controller PCBA Plate enters test pattern；Otherwise test crash terminates test；

3, starting test presses tooling starting testing button or by test host computer starting test；

4, test host computer sequence issues test file instruction, carries out input and output control to the function test system, builds each Item function test environment is simultaneously tested；Desk-top multimeter is recorded in test file simultaneously, in electric machine controller PCBA board Single-chip microcontroller and compares the value of feedback with theoretical value to the value of feedback of test host computer: if value of feedback and theoretical calculation Or in theoretical value prescribed limit, then the test result of this, which is denoted as, passes through, and is otherwise denoted as and does not pass through；

If 5, the test result of each single item is to pass through in test file, the electric machine controller PCBA board is qualified, otherwise, the electricity Machine controller PCBA board is unqualified；Lasting wait is again started up test；

6, in test process, test host computer monitors the signal input and output channel state of each loading module in real time, in real time Count the state switching time in the input of loading module WP8024 digital quantity, relay output channel and WP8027 digital output channel The access times of each relay of number, as loading module control, and real-time display is on test interface；

The access times of each relay are made comparisons with the service life of relay, when there is the use of at least one relay When number is greater than or equal to service life, the relay for prompting a certain paths of the loading module of some address to control be arrived Service life, and test is terminated, otherwise continue to execute test.

10. test method as claimed in claim 9, it is characterised in that: in step 4, the functional test further includes motor control The rotation of device PCBA board processed becomes the test of demodulation module, comprising the following steps:

4.1, test host computer is sent out in the form of CAN message to the single-chip microcontroller of electric machine controller PCBA board connector C4, C30 Rotation variate instruction is read out, and single-chip microcontroller output drive source signal EXCP and EXCN, by connector C30, the signal is input to functions The rotation of test adaptor plate becomes module, and rotation becomes output signal and is transferred to electric machine controller PCBA board by connector C30, passes through motor The rotation of controller PCBA board becomes demodulation module and calculates output rotation variate, and variate finally is revolved in output by connector C4 by single-chip microcontroller Feed back to test host computer；

4.2, test host computer record and rotation variate and theoretical value are compared, if rotation variate and theoretical calculation or in theoretical value In prescribed limit, then the test result of this, which is denoted as, passes through, and is otherwise denoted as and does not pass through.