Inverter power supply control circuit board test method and system

Abstract

The invention discloses an inverter power supply control circuit board test method and system. The method comprises the following steps: turning on a direct-current power supply and an alternating-current resistance load in a test instrument; the upper computer reads actual test data of the power meter and compares the actual test data with correct data for judgment, and if the actual test data is within the range of the correct data, the upper computer controls and adjusts the output voltage of the direct-current power supply, closes the direct-current power supply and the alternating-current resistance load in the test instrument, and opens the variable-frequency power supply and the electronic load; the upper computer records and judges parameters of the electronic load, and if the parameters are within a correct data range, the upper computer controls and adjusts the output voltage of the variable-frequency power supply, closes the variable-frequency power supply and the electronic load and prints test data; the inverter power supply function testing device is simple in structure, can effectively solve the problem of function testing of an inverter power supply, effectively eliminates the possibility of errors generated by manual testing, can completely form test data into a spreadsheet through an upper computer, can permanently archive the spreadsheet so as to facilitate tracing, and effectively reduces the testing cost.

Description

Technical Field

[0001] The invention belongs to the field of testing equipment, and in particular relates to a method and a system for testing an inverter power supply control circuit board. Background Art

[0002] An inverter is a power supply device that converts direct current into alternating current. The inverter converts the input direct current into output alternating current through the working principle of electronic components, and supplies it to various devices that require alternating current. An inverter usually consists of an input filter, a rectifier, a capacitor, an inverter, an output filter and other parts. The inverter has a variety of protection functions, such as overload, short circuit, overtemperature and other protection mechanisms. At present, the testing of inverters in the market is mainly based on visual inspection and manual operation. The numerical requirements for workers are relatively high, and testers must have certain relevant technical knowledge; there are also a series of problems such as low test efficiency and high risk of test errors. Therefore, it is very important to obtain a test method and system for inverter control circuit boards. Summary of the invention

[0003] To solve at least one of the above technical problems, on the one hand, the present invention provides a method for testing an inverter power supply control circuit board, comprising:

[0004] S1, preset the correct data of the host computer;

[0005] S2, turn on the DC power supply and AC resistance load in the test instrument;

[0006] S3, the host computer reads the actual test data of the power meter and compares it with the correct data. If it is not within the range of the correct data, the DC power supply and AC resistance load in the test instrument are turned off, and the test data is printed;

[0007] S4. If it is within the range of correct data, the host computer controls to adjust the output voltage of the DC power supply, then tests the three-level voltage of the inverter power supply, and returns to step S2;

[0008] Turn off the DC power supply and AC resistance load in the test instrument, and turn on the variable frequency power supply and electronic load;

[0009] S5. The host computer records the parameters of the electronic load and judges that if they are not within the correct data range, the variable frequency power supply and the electronic load are turned off, and the test data is printed;

[0010] S6. If it is within the range of correct data, the host computer controls to adjust the output voltage of the variable frequency power supply, then tests the second-gear voltage of the inverter power supply, and returns to step S5;

[0011] Turn off the variable frequency power supply and electronic load, and print the test data;

[0012] S7. Testing completed.

[0013] 2. The inverter power supply control circuit board testing method according to claim 1, characterized in that: the host computer configures various parameters for the test instrument;

[0014] The host computer is equipped with RS485 software to control the output voltage range, maximum output current, voltage protection value, and current protection value of the DC power supply;

[0015] The host computer is equipped with RS232 software to read the power meter parameters and control the voltage position and the resistance position of the AC resistance load.

[0016] The host computer edits the test content and formulates different test contents and test standards according to different products, including charging voltage, charging current, discharging voltage, discharging current, and electrical protection alarm; the host computer automatically generates and saves reports on the test results.

[0017] In another aspect, the present invention provides a power control circuit board test system, including a test instrument:

[0018] DC power supply, DC power connection port;

[0019] Electronic load, electronic load connection port;

[0020] Variable frequency power supply, variable frequency power supply connection port;

[0021] A power meter and at least one connection port for an input interface of the power meter;

[0022] It also includes: an AC resistance load, a host computer, and a connection port of the output interface of the power meter is connected to the AC resistance load; the host computer and the test instrument are connected via a communication interface.

[0023] It also includes a DC power supply simulating a battery to power the test instrument, an AC resistance load simulating an AC output load, and a power meter testing various parameters of the AC output port including voltage, current, power, and TH; a variable frequency power supply provides 110V or 220V AC power to the test instrument, an electronic load simulates battery charging, and a host computer controls the devices in the test instrument through a communication interface and outputs test data through a display.

[0024] The mainboard of the test instrument is fixed on the jig, and the test pad under the mainboard is connected to the DC power connection port, the electronic load connection port, the variable frequency power connection port, and the connection port through a pin. The test fixture of the jig is provided with a test port for connecting the test instrument.

[0025] The test fixture includes a base, on which a first protrusion, a second protrusion and a third protrusion are fixed, the first protrusion is rotatably connected to a first turntable, the second protrusion is rotatably connected to a second turntable, and the third protrusion is rotatably connected to a first clamping block and a second clamping block, and also includes a first belt and a second belt, the first end of the first belt is fixedly connected to the first clamping block, and the second end of the first belt is fixed to the second clamping block after passing around the second turntable; the first end of the second belt is fixedly connected to the second clamping block, and the second end of the second belt is fixed to the first clamping block after passing around the first turntable, the first clamping block and the second clamping block are arranged opposite to each other and are both provided with a holding part. A bracket is fixed to the first clamping block and the second clamping block of each clamping part, and a telescopic cylinder is fixed to the bracket, and a spring probe is fixed to the end of the telescopic cylinder, and the spring probe forms a test port electrically connected to the test instrument.

[0026] The drive structure also includes a drive bracket fixed on the base, a drive motor is fixed on the drive bracket, a drive cylinder is fixed on the output shaft of the drive motor, a continuous guide groove connected end to end is opened on the outer wall of the drive cylinder, a rotating member is rotatably connected to the drive bracket through a rotating column, the end of the rotating member is rotatably connected to a guide block moving in the guide groove, and the rotating shaft of the rotating member is fixed to the first turntable so that the first turntable can rotate back and forth.

[0027] Through the above structure, a non-stop driving motor is used to realize the reciprocating rotation of the first turntable, so as to realize the opposite clamping of the first clamping block and the second clamping block, and the test connection of the spring probe is realized after the clamping and positioning.

[0028] Compared with the prior art, the advantages of the present invention are: the present invention has a simple structure, can effectively solve the functional test of the inverter power supply, effectively eliminates the possibility of errors caused by manual testing, and can completely form the test data into an electronic spreadsheet through the upper computer, permanently archive it for traceability, and effectively reduce the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a flow chart of the method of the present invention;

[0030] Figure 2 It is a system structure block diagram of the present invention;

[0031] Figure 3 This is a schematic diagram of the test fixture structure of the present invention;

[0032] Figure 4 This is a schematic diagram of the driving structure of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of the first clamping block of the present invention;

[0034] Figure 6This is a schematic diagram of the structure of the second clamping block of the present invention;

[0035] Figure 7 This is a front view of the first clamping block of the present invention;

[0036] Figure 8 It is a side cross-sectional schematic diagram of the rotating member of the present invention;

[0037] Fig. 9 yes Figure 4 Schematic diagram after being put into use;

[0038] Reference numerals:

[0039] 101 DC power supply; 102 DC power supply connection port; 103 electronic load; 104 electronic load connection port; 105 variable frequency power supply; 106 variable frequency power supply connection port; 107 power meter; 108 connection port; 109 AC resistance load; 110 host computer;

[0040] 201 base; 202 first protrusion; 203 second protrusion; 204 third protrusion; 205 first turntable; 206 second turntable; 207 second clamping block; 208 first belt; 209 second belt; 210 supporting part; 211 bracket; 212 telescopic cylinder; 213 spring probe; 214 driving bracket; 215 driving motor; 216 driving cylinder; 217 guide groove; 218 rotating column; 219 rotating member; 220 guide block; 221 first clamping block. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the present invention, and thus to more clearly define the scope of the protection claimed in the present invention, the present invention is described in detail with respect to certain specific embodiments of the present invention. It should be noted that the following are only certain specific implementations of the present invention, which are only some embodiments of the present invention, wherein the specific and direct description of the relevant structures is only for the convenience of understanding the present invention, and each specific feature does not naturally and directly limit the scope of implementation of the present invention.

[0042] Referring to the accompanying drawings, the present invention adopts the following technical solutions. On the one hand, the present invention provides a method for testing an inverter power supply control circuit board, comprising:

[0043] S1, preset correct data of the host computer 110;

[0044] S2, turning on the DC power supply 101 and the AC resistance load 109 in the test instrument;

[0045] S3, the host computer 110 reads the actual test data of the power meter 107, and compares it with the correct data. If it is not within the range of the correct data, the DC power supply 101 and the AC resistance load 109 in the test instrument are turned off, and the test data is printed;

[0046] S4, if it is within the range of correct data, the host computer 110 controls and adjusts the output voltage of the DC power supply 101, then tests the three-level voltage of the inverter power supply, and returns to the supplement step S2;

[0047] Turn off the DC power supply 101 and the AC resistance load 109 in the test instrument, and turn on the variable frequency power supply 105 and the electronic load 103;

[0048] S5, the host computer 110 records the parameters of the electronic load 103 and determines that if the parameters are not within the range of correct data, the variable frequency power supply 105 and the electronic load 103 are turned off, and the test data is printed;

[0049] S6. If it is within the range of correct data, the host computer 110 controls and adjusts the output voltage of the variable frequency power supply 105, then tests the second-level voltage of the inverter power supply, and then returns to step S5;

[0050] Turn off the variable frequency power supply 105 and the electronic load 103, and print the test data;

[0051] S7. Testing completed.

[0052] 2. The inverter power supply control circuit board testing method according to claim 1, characterized in that: the host computer 110 configures various parameters for the test instrument;

[0053] The host computer 110 is equipped with RS485 software to control the output voltage range, maximum output current, voltage protection value, and current protection value of the DC power supply 101;

[0054] The host computer 110 is equipped with RS232 software to read the parameters of the power meter 107 and control the voltage position and the resistance position of the AC resistance load 109 .

[0055] The host computer 110 edits the test content and formulates different test contents and test standards according to different products, including charging voltage, charging current, discharging voltage, discharging current, and electrical protection alarm; the host computer 110 automatically generates and saves reports on the test results.

[0056] In another aspect, the present invention provides a power control circuit board test system, including a test instrument:

[0057] DC power supply 101, DC power connection port 102;

[0058] Electronic load 103, electronic load connection port 104;

[0059] Variable frequency power supply 105, variable frequency power supply connection port 106;

[0060] A power meter 107 and at least one connection port 108 for an input interface of the power meter 107;

[0061] It also includes: an AC resistance load 109 and a host computer 110. The connection port 108 of the output interface of the power meter 107 is connected to the AC resistance load 109. The host computer 110 and the test instrument are connected via a communication interface.

[0062] It also includes a DC power supply 101 to simulate a battery to power the test instrument, an AC resistance load 109 to simulate an AC output load, and a power meter 107 to test various parameters of the AC output port including voltage, current, power, and TH; a variable frequency power supply 105 to provide 110V or 220V AC power to the test instrument, an electronic load 103 to simulate battery charging, and a host computer 110 to control the devices in the test instrument through a communication interface and output test data through a display.

[0063] The mainboard of the test instrument is fixed on the jig, and the test pad under the mainboard is connected to the DC power connection port 102, the electronic load connection port 104, the variable frequency power connection port 106, and the connection port 108 through the ejector pin. The test fixture of the jig is provided with a test port for connecting the test instrument.

[0064] The test fixture includes a base 201, on which a first protrusion 202, a second protrusion 203 and a third protrusion 204 are fixed, the first protrusion 202 is rotatably connected to a first turntable 205, the second protrusion 203 is rotatably connected to a second turntable 206, the third protrusion 204 is rotatably connected to a first clamping block 221 and a second clamping block 207, and also includes a first belt 208 and a second belt 209, the first end of the first belt 208 is fixedly connected to the first clamping block 221, and the second end of the first belt 208 is fixed to the second clamping block 207 after passing through the second turntable 206; the first end of the second belt 209 is fixedly connected to the second clamping block 207, and the second end of the second belt 209 is fixed to the first clamping block 221 after passing through the first turntable 205, the first clamping block 221 and the second clamping block 207 are arranged opposite to each other, and both are provided with a supporting portion 210. A bracket 211 is fixed to the first clamping block 221 and the second clamping block 207 of each clamping part, a telescopic cylinder 212 is fixed to the bracket 211, a spring probe 213 is fixed to the end of the telescopic cylinder 212, and the spring probe 213 forms a test port electrically connected to the test instrument.

[0065] The driving structure also includes a driving bracket 214 fixed on the base 201, a driving motor 215 is fixed on the driving bracket 214, a driving cylinder 216 is fixed on the output shaft of the driving motor 215, and a continuous guide groove 217 connected end to end is opened on the outer wall of the driving cylinder 216. A rotating member 219 is rotatably connected to the driving bracket 214 through a rotating column 218, and the end of the rotating member 219 is rotatably connected to a guide block 220 that moves in the guide groove 217. The rotating axis of the rotating member 219 is fixed to the center of the first turntable 205 so that the first turntable 205 can rotate back and forth.

[0066] Through the above structure, the non-stop driving motor 215 is used to realize the reciprocating rotation of the first turntable 205 to achieve the opposite clamping of the first clamping block 221 and the second clamping block 207, and the test connection of the spring probe 213 is realized after the clamping and positioning.

[0067] A controller may be installed on the main board of the test instrument, and the controller controls the operation of the drive motor 215 and the telescopic cylinder 212 so as to cooperate in clamping the inverter power supply being tested.

[0068] Compared with the prior art, the advantages of the present invention are: the present invention has a simple structure, can effectively solve the functional test of the inverter power supply, effectively eliminates the possibility of errors caused by manual testing, and can completely form the test data into an electronic spreadsheet through the host computer 110, permanently archive it for traceability, and effectively reduce the testing cost.

[0069] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A method for testing an inverter power supply control circuit board: characterized in that: include: S1, preset the correct data of the host computer (110); S2, turning on the DC power supply (101) and the AC resistance load (109) in the test instrument; S3, the host computer (110) reads the actual test data of the power meter (107), compares and judges with the correct data, and if it is not within the range of the correct data, turns off the DC power supply (101) and the AC resistance load (109) in the test instrument, and prints the test data; S4. If it is within the range of correct data, the host computer (110) controls and adjusts the output voltage of the DC power supply (101), then tests the three-speed voltage of the inverter power supply, and returns to step S2; and turns off the DC power supply (101) and the AC resistance load (109) in the test instrument, and turns on the variable frequency power supply (105) and the electronic load (103); S5, the host computer (110) records the parameters of the electronic load (103) and determines that if the parameters are not within the range of correct data, the variable frequency power supply (105) and the electronic load (103) are turned off, and the test data is printed; S6. If it is within the range of correct data, the host computer (110) controls and adjusts the output voltage of the variable frequency power supply (105), then tests the second-level voltage of the inverter power supply, and returns to step S5; Turn off the variable frequency power supply (105) and the electronic load (103), and print the test data; S7. Testing completed.

2. The inverter power supply control circuit board testing method according to claim 1, characterized in that: Configuring various parameters for the test instrument through the host computer (110); The host computer (110) is equipped with RS485 software to control the output voltage range, maximum output current, voltage protection value, and current protection value of the DC power supply (101); The host computer (110) is equipped with RS232 software to read the parameters of the power meter (107) and control the voltage position of the AC resistance load (109) and the resistance position of the AC resistance load (109).

3. The inverter power supply control circuit board testing method according to claim 1, characterized in that: The host computer (110) edits the test content and formulates different test contents and test standards according to different products, including charging voltage, charging current, discharging voltage, discharging current, and electrical protection alarm.

4. The inverter power supply control circuit board testing method according to claim 1, characterized in that: The host computer (110) automatically generates a report for the test results and saves it.

5. An inverter power supply control circuit board test system, characterized in that: Test equipment included: A direct current power supply (101), a direct current power supply connection port (102); An electronic load (103) and an electronic load connection port (104); A variable frequency power supply (105) and a variable frequency power supply connection port (106); A power meter (107), and a connection port (108) for an input interface of at least one power meter (107); Also includes: The AC resistance load (109), the host computer (110), and the connection port (108) of the output interface of the power meter (107) are connected to the AC resistance load (109); the host computer (110) and the test instrument are connected via a communication interface.

6. The inverter power supply control circuit board test system according to claim 5, characterized in that: It also includes a DC power supply (101) simulating a battery to supply power to the test instrument, an AC resistance load (109) simulating an AC output load, and a power meter (107) testing various parameters of the AC output port including voltage, current, power, and TH; The variable frequency power supply (105) provides 110V or 220V mains electricity to the test instrument, the electronic load (103) simulates battery charging, and the host computer (110) controls the components in the test instrument through the communication interface and outputs test data through a display.

7. The inverter power supply control circuit board test system according to claim 5, characterized in that: The mainboard of the test instrument is fixed on a jig, and the test pad under the mainboard is connected to a DC power connection port (102), an electronic load connection port (104), a variable frequency power connection port (106), and a connection port (108) through a pin, and a test fixture of the jig is provided with a test port for connecting the test instrument.

8. The inverter power supply control circuit board test system according to claim 7, characterized in that: The test fixture comprises a base (201), a first convex block (202), a second convex block (203) and a third convex block (204) are fixed on the base (201), a first turntable (205) is rotatably connected to the first convex block (202), a second turntable (206) is rotatably connected to the second convex block (203), a first clamping block (221) and a second clamping block (207) are rotatably connected to the third convex block (204), and the first belt (208), the second belt (209), the first The first end of the belt (208) is fixedly connected to the first clamping block (221), and the second end of the first belt (208) is fixed to the second clamping block (207) after passing through the second rotating disk (206); the first end of the second belt (209) is fixedly connected to the second clamping block (207), and the second end of the second belt (209) is fixed to the first clamping block (221) after passing through the first rotating disk (205); the first clamping block (221) and the second clamping block (207) are arranged opposite to each other and are both provided with a supporting portion (210).

9. The inverter power supply control circuit board test system according to claim 8, characterized in that: A bracket (211) is fixed on the first clamping block (221) and the second clamping block (207) of each clamping portion, a telescopic cylinder (212) is fixed on the bracket (211), a spring probe (213) is fixed at the end of the telescopic cylinder (212), and the spring probe (213) forms a test port electrically connected to a test instrument.

10. The inverter power supply control circuit board test system according to claim 8, characterized in that: The invention also comprises a driving structure, wherein the driving structure comprises a driving bracket (214) fixed on the base (201), a driving motor (215) being fixed on the driving bracket (214), a driving cylinder (216) being fixed on the output shaft of the driving motor (215), a continuous guide groove (217) connected end to end being opened on the outer wall of the driving cylinder (216), a rotating member (219) being rotatably connected to the driving bracket (214), an end of the rotating member (219) being rotatably connected to a guide block (220) moving in the guide groove (217), and a rotating shaft of the rotating member (219) being fixed to the first turntable (205) so that the first turntable (205) can rotate back and forth.

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