CN117250509B

CN117250509B - DC brushless motor assembly test system and method

Info

Publication number: CN117250509B
Application number: CN202311541662.5A
Authority: CN
Inventors: 王智明; 郭心宇; 邵天宇; 田博辉; 曲汉武; 许广峰
Original assignee: China Oilfield Services Ltd
Current assignee: China Oilfield Services Ltd
Priority date: 2023-11-20
Filing date: 2023-11-20
Publication date: 2024-01-23
Anticipated expiration: 2043-11-20
Also published as: CN117250509A

Abstract

The invention relates to a DC brushless motor assembly test system and a method, wherein the system comprises: the control and drive module is used for controlling the outgoing line of the direct current brushless motor to be connected to the resistance measurement module or the rotary-change decoding module through the interface module; the resistance measurement module is used for dividing the outgoing line into three types of three-phase lines, a shell line and a rotary transformation line through measurement; the display module is used for displaying the first resistor, the second resistor and the third resistor; the rotation-varying decoding module is used for providing decoding signals for the rotation-varying phase sequence detection module; the rotation phase sequence detection module is used for judging whether the rotation line is correctly connected to the rotation decoding module according to the decoding signal. The test system can judge the type of the outgoing line of the motor, thereby providing support for correct wiring in the use process of the motor and having the advantages of convenient judgment and simple operation.

Description

DC brushless motor assembly test system and method

Technical Field

The invention belongs to the technical field of direct current brushless motor characteristic test, and particularly relates to a direct current brushless motor assembly test system and method.

Background

The DC brushless motor has the advantages of small volume, light weight, high efficiency, good torque control performance and the like, and is widely applied to various fields of aviation, aerospace, oil and gas exploration and the like. The assembly work of the brushless DC motor is an important link of the application, and the number of the outgoing lines of the brushless DC motor with the rotation change is up to 10. The existing test equipment measures the definition of the outgoing line of the brushless DC motor in a traditional mode, such as: the insulation performance is measured by adopting a megameter, the phase resistance is measured by adopting a milliohm meter, the motor phase sequence is measured by adopting an oscilloscope, the rotation phase sequence is measured by adopting a repeated attempt method, and meanwhile, the test can be completed by the aid of other equipment such as a power supply. The equipment is heavy and complicated, is unfavorable for carrying, has high requirement on test space, is difficult to operate in a small space range, has complex operation process and long time consumption, causes large operation error due to manual waveform observation, has higher requirement on quality of operators, causes wiring error easily in the assembly process, and causes faults and even burnout of the DC brushless motor, so that the DC brushless motor assembly test system needs to be designed, and can rapidly test three-phase lead wires of the DC brushless motor, lead wires of a shell and a rotary phase sequence to guide assembly work.

Disclosure of Invention

In order to solve all or part of the above problems, the present invention is directed to a system and a method for assembling and testing a brushless dc motor.

According to one aspect of the present invention, there is provided a brushless dc motor assembly test system comprising:

the control and driving module is used for controlling the outgoing line of the direct current brushless motor to be connected to the resistance measurement module through the interface module or connected to the rotary transformation decoding module through the interface module;

the resistance measurement module is used for dividing outgoing lines of the direct-current brushless motor into three types of three-phase lines, a shell line and a rotary-change line through measurement, measuring a first resistance between any two phase lines of the three-phase lines, measuring a second resistance of each line of the three-phase lines of the direct-current brushless motor to the ground, and measuring a third resistance between each pair of rotary-change lines with the same rotary change in the rotary-change lines;

the resistance measurement module is connected with a display module, and the display module is used for displaying the first resistor, the second resistor and the third resistor;

the rotation-varying decoding module is connected with a rotation-varying phase sequence detection module, and is used for providing decoding signals for the rotation-varying phase sequence detection module when a rotation-varying line of the direct-current brushless motor is connected to the rotation-varying decoding module;

The rotation phase sequence detection module is used for judging whether the rotation line is correctly connected to the rotation decoding module according to the received decoding signal;

the display module is used for displaying the rotation phase sequence of the rotation line connected to the rotation decoding module when the rotation line is correctly connected to the rotation decoding module.

Further, the resistance measurement module comprises a phase resistance measurement branch, an insulation resistance measurement branch and a rotary resistance measurement branch, one ends of the phase resistance measurement branch, the insulation resistance measurement branch and the rotary resistance measurement branch are all connected to a high-voltage constant current source, and the other ends of the phase resistance measurement branch, the insulation resistance measurement branch and the rotary resistance measurement branch are all connected with the interface module.

Further, the phase resistance measurement branch circuit comprises a first voltage-stabilizing differential sampling circuit, and a phase resistance measurement matching resistor is connected in parallel between two ends of the first voltage-stabilizing differential sampling circuit;

after the phase resistance measurement matching resistor is connected with the first voltage-stabilizing differential sampling circuit in parallel, one end of the phase resistance measurement matching resistor is connected to the high-voltage constant current source through a first wire, and the other end of the phase resistance measurement matching resistor is connected with the interface module through a second wire;

The first lead is provided with a first relay and/or the second lead is provided with a second relay, and the first relay and the second relay are controlled by the control and driving module to be disconnected or connected.

Further, the insulation resistance measurement branch comprises an insulation resistance measurement matching resistor, one end of the insulation resistance measurement matching resistor is connected with the high-voltage constant current source through a third wire, the other end of the insulation resistance measurement matching resistor is connected with one end of the matching resistor, and the other end of the matching resistor is connected with the interface module through a fourth wire;

a second voltage-stabilizing differential sampling circuit is connected in parallel between two ends of the matching resistor;

and the third wire is provided with a third relay and/or the fourth wire is provided with a fourth relay, and the switching-on or switching-off of the third relay and the fourth relay is controlled by the control and driving module.

Further, the rotary resistance measurement branch comprises a third voltage-stabilizing differential sampling circuit, and a rotary resistance measurement matching resistor is connected in parallel between two ends of the third voltage-stabilizing differential sampling circuit;

after the third voltage stabilizing differential sampling circuit is connected with the rotary resistor measurement matching resistor in parallel, one end of the third voltage stabilizing differential sampling circuit is connected with the high-voltage constant current source through a fifth wire, and the other end of the third voltage stabilizing differential sampling circuit is connected with the interface module through a sixth wire;

And a fifth relay is arranged on the fifth wire, and/or a sixth relay is arranged on the sixth wire, and the switching-on or switching-off of the fifth relay and the sixth relay is controlled by the control and driving module.

Further, the interface module comprises a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface, an eighth interface, a ninth interface and a tenth interface which are used for being connected with the outgoing line of the direct current brushless motor; wherein:

the first interface is connected with a resistance measurement port+ of the resistance measurement module through a seventh relay;

the second interface is connected with a resistance measurement port of the resistance measurement module through an eighth relay, and the second interface is connected with the resistance measurement port of the resistance measurement module through a tenth relay;

the third interface is connected with a resistance measurement port of the resistance measurement module through a ninth relay, and the third interface is connected with the resistance measurement port of the resistance measurement module through an eleventh relay;

the fourth interface is connected with a resistance measurement port of the resistance measurement module through a twelfth relay;

The fifth interface is connected with a resistance measurement port+ of the resistance measurement module through a thirteenth relay;

the sixth interface is connected with the resistance measurement port of the resistance measurement module through a fourteenth relay, and the sixth interface is connected with the resistance measurement port of the resistance measurement module through a nineteenth relay;

the seventh interface is connected with a resistance measurement port of the resistance measurement module through a fifteenth relay, and the seventh interface is connected with the resistance measurement port of the resistance measurement module through a twentieth relay;

the eighth interface is connected with a resistance measurement port of the resistance measurement module through a sixteenth relay, and the eighth interface is connected with the resistance measurement port of the resistance measurement module through a twenty-first relay;

the ninth interface is connected with a resistance measurement port of the resistance measurement module through a seventeenth relay, and the ninth interface is connected with the resistance measurement port of the resistance measurement module through a twenty-second relay;

the tenth interface is connected with the resistance measurement port of the resistance measurement module through an eighteenth relay, and the tenth interface is connected with the resistance measurement port of the resistance measurement module through a thirteenth relay.

Further, the sixth interface is connected with an excitation positive port of the rotary-transformer decoding module through a twenty-four relay, and the seventh interface is connected with an excitation negative port of the rotary-transformer decoding module through a twenty-five relay;

the seventh interface is connected with the sin+ port of the rotary-transformer decoding module through a twenty-seventh relay, and the eighth interface is connected with the sin+ port of the rotary-transformer decoding module through a twenty-seventh relay;

the eighth interface is connected with the Sin-port of the rotary decoding module through a twenty-eighth relay, and the seventh interface is connected with the Sin-port of the rotary decoding module through a twenty-ninth relay;

the ninth interface is connected with the Cos+ port of the rotary-variable decoding module through a thirty-first relay, and the tenth interface is connected with the Cos+ port of the rotary-variable decoding module through a thirty-first relay;

the tenth interface is connected with the Cos-port of the rotary-transformer decoding module through a thirty-second relay, and the ninth interface is connected with the Cos-port of the rotary-transformer decoding module through a thirty-third relay.

Further, the first interface is connected with an A port of the control and drive module through a thirty-fourth relay;

The second interface is connected with the B port of the control and drive module through a thirty-five relay;

and the third interface is connected with the C port of the control and drive module through a thirty-six relay.

According to another aspect of the present invention, there is provided a method for assembling and testing a brushless dc motor, comprising:

each interface of the interface module is respectively connected with an outgoing line of a direct current brushless motor;

the interface module is controlled by the control and drive module, so that two outgoing lines connected with the interface module are connected to the resistance measurement module, the first relay and the second relay of the resistance measurement module are controlled to be closed, whether two lines of the access circuit are two of three-phase lines or not is judged, if yes, the two detected outgoing lines are marked, the first resistance between the two lines is displayed by the display module, if no, the outgoing lines of the access circuit are replaced by the control and drive module, and the judgment is carried out again until the three-phase lines and the first resistance between any two three-phase lines are obtained;

the interface module is controlled by the control and drive module, so that one of the three phase lines and the other outgoing line except the three phase lines are connected to the resistance measurement module, the third relay and the fourth relay of the resistance measurement module are controlled to be closed, whether the other outgoing line which is connected with the resistance measurement module is a shell line or not is judged, if so, the second resistance between the phase line and the shell is displayed by the display module, and if not, the other outgoing line which is connected with the circuit is controlled by the control and drive module to be replaced and judged again until the shell line is obtained and marked;

The interface module is controlled by the control and drive module, so that each of the other two three-phase lines is connected to the resistance measurement module together with the shell wire respectively, the third relay and the fourth relay of the resistance measurement module are controlled to be closed, and the second resistance between the phase line and the shell is displayed by the display module;

the interface module is controlled by the control and drive module, so that two outgoing lines except for the three-phase line and the shell line are connected to the resistance measurement module, the fifth relay and the sixth relay of the resistance measurement module are controlled to be closed, whether the two outgoing lines of the access circuit are identical in rotation or not is judged, if the two outgoing lines are identical in rotation, the rotation phase sequences of the two outgoing lines are displayed by the display module, a third resistor between the two outgoing lines is displayed by the display module, and if the two outgoing lines are not identical, the outgoing lines of the access circuit are controlled to be replaced by the control and drive module and judged again until three pairs of rotation lines and three groups of third resistors are obtained;

the interface module is controlled by the control and drive module, so that a pair of excitation outgoing lines are connected to the excitation positive port and the excitation negative port of the rotary decoding module, the interface module is controlled by the control and drive module, so that Sin rotary wires are connected to the sin+ port and the Sin-port, cos rotary wires are connected to the cos+ port and the Cos-port, the rotary phase sequence detection module judges whether the rotary phase sequence at the moment is correct, if the rotary phase sequence is correct, the corresponding rotary phase sequence is marked, if the rotary phase sequence is incorrect, the interface module is controlled by the control and drive module, so that the Sin rotary wires connected to the sin+ port and the Sin-port are exchanged, and/or the interface module is controlled by the control and drive module, so that the Cos rotary phase wires connected to the cos+ port and the Cos-port are exchanged, and whether the rotary phase sequence at the moment is correct is judged again, and when the rotary phase sequence is judged to be correct, the corresponding rotary phase sequence is marked.

Further, the step of determining, by the phase sequence detection module, whether the rotational connection method at the moment is correct further includes:

reading data of n timer periods provided by a rotary transformation decoding module, and storing the data into an input array S1 after recursive average filtering, wherein n is more than or equal to 500;

obtaining a maximum value and a minimum value of the data stored in the array S1;

intercepting m complete period data from the stored data according to the obtained maximum value and minimum value, and storing the data in a new array S2, wherein m is more than or equal to 3 and m is less than 500;

calculating the slope of the data of each period of the array S2 by a two-point method to obtain m slope results, removing the maximum value and the minimum value in the m slope results, taking an average value, and recording the average value as a first average value;

changing the rotating speed of the motor, and repeating the steps to obtain a second average value and a third average value;

if the sum of the first average value, the second average value and the third average value is larger than a set threshold value, the spin-on method at the moment is judged to be correct, otherwise, the spin-on method at the moment is judged to be incorrect.

According to the technical scheme, the system and the method for assembling and testing the DC brushless motor have the following beneficial effects:

the test system can judge the type of the outgoing line of the motor, thereby providing support for correct wiring in the use process of the motor and having the advantages of convenient judgment and simple operation.

Drawings

FIG. 1 is a schematic diagram of a measured DC brushless motor lead wire with a mounted spin-on;

FIG. 2 is a block diagram of a DC brushless motor assembly test system according to an embodiment of the invention;

FIG. 3 is a block diagram illustrating a connection of a resistance measurement module according to an embodiment of the present invention;

FIG. 4 is a connection block diagram of an interface module according to an embodiment of the present invention;

fig. 5 is a flow chart of a method for assembling and testing a brushless dc motor according to an embodiment of the invention.

Detailed Description

In order to better understand the purpose, structure and function of the present invention, a system and method for assembling and testing a brushless dc motor according to the present invention are described in further detail below with reference to the accompanying drawings.

As shown in fig. 1, the outgoing lines of the installed rotary-transformer direct-current brushless motor comprise three phases a, b, c, a shell, excitation+, excitation-, sin+, sin-, cos+ and Cos-; wherein, the three phases a, b and c are collectively referred to as three-phase lines; the excitation+, excitation-, sin+, sin-, cos+ and Cos-are collectively called spin-change lines, the sin+ and Sin-two outgoing lines are called Sin spin-change lines, the excitation+ and excitation-two outgoing lines are called excitation spin-change lines, and the cos+ and Cos-two outgoing lines are called Cos spin-change lines; therefore, the lead-out wires for installing the rotary-variable tested brushless DC motor comprise three types: the three-phase line, the shell line and the rotary transformation line, so that when the motor is specifically used, the type of outgoing lines of the motor, the corresponding line resistance, the insulation resistance and the like are needed to be known at first, and the motor is used for solving the problems.

As shown in fig. 2, the system for assembling and testing a brushless dc motor of the present invention includes a control and driving module 01, an interface module 02, a rotation decoding module 03, a resistance measuring module 04, a rotation phase sequence detecting module 05, and a display module 06, wherein:

the control and driving module 01 is used for controlling the outgoing line of the direct current brushless motor 07 to be connected to the resistance measuring module 04 through the interface module 02 or connected to the rotary decoding module 03 through the interface module 02;

the resistance measurement module 04 is used for dividing outgoing lines of the brushless DC motor 07 into three types of three phase lines, a shell line and a rotary change line by measurement, measuring a first resistance between any two phase lines of the three phase lines of the brushless DC motor 07, measuring a second resistance between each line of the three phase lines of the brushless DC motor 07 and the ground, and measuring a third resistance between outgoing lines of the same pair of rotary changes in the rotary change line of the brushless DC motor 07;

the resistance measurement module 04 is connected with a display module 06, and the display module 06 is used for displaying a first resistance, a second resistance and a third resistance;

the rotation decoding module 03 is connected with a rotation phase sequence detection module 05, and the rotation decoding module 03 is used for providing a decoding signal for the rotation phase sequence detection module 05 when a rotation line of the brushless DC motor 07 is connected to the rotation decoding module 03;

The phase sequence detecting module 05 is configured to determine whether the phase sequence of the rotation line is correctly connected to the phase sequence detecting module 03 according to the received decoding signal;

the phase sequence detecting module 05 is connected with the display module 06, and the display module 06 is configured to display a phase sequence of a phase change line connected to the phase change decoding module 03 when the phase change line is correctly connected to the phase change decoding module 03.

In a specific embodiment, as shown in fig. 3, the resistance measurement module 04 includes a phase resistance measurement branch, an insulation resistance measurement branch, and a resolver measurement branch, where one ends of the phase resistance measurement branch, the insulation resistance measurement branch, and the resolver measurement branch are all connected to the high-voltage constant current source 041, and the other ends of the phase resistance measurement branch, the insulation resistance measurement branch, and the resolver measurement branch are all connected to the interface module 02.

In this embodiment, the resistance measurement module 04 specifically includes a phase resistance measurement branch, an insulation resistance measurement branch, and a resolver resistance measurement branch, where when the lead wires of the measured brushless dc motor 07 are connected to the phase resistance measurement branch, the two lead wires can be used to measure whether the two lead wires are three-phase wires, if so, the first resistance between the two wires is displayed by the display module 06, so that three-phase wires are obtained from ten lead wires of the brushless dc motor 07 and marked, and in addition, the first resistance between any two of the three-phase wires can be obtained through multiple measurements; when one of the three phase lines and one of the remaining seven outgoing lines are connected to the insulation resistance measuring branch, one unknown outgoing line that can be used for measuring whether the connected outgoing line is a casing line, so that a casing line can be obtained, in addition, by connecting the casing line and any one of the three phase lines to the insulation resistance measuring branch, a second resistance between the phase line and the casing line can be read through a display module 06 connected with the resistance measuring module 04; by connecting the phase resistance measuring branch and the insulation resistance measuring branch with the tested outgoing lines respectively, three phase lines and one shell line can be obtained, the remaining six outgoing lines are all the rotary change lines, when two of the remaining six outgoing lines are connected to the rotary change resistance measuring branch, the rotary change measuring branch can be used for measuring whether the two outgoing lines are identical in rotary change, namely identical in exciting rotary change line, identical in Sin rotary change line or identical in Cos rotary change line, and in addition, if the two tested outgoing lines are identical in rotary change, the rotary change condition of the two tested outgoing lines and the corresponding third resistor are displayed through the display module 06.

The resistance measurement module 04 adopts a high-voltage constant current source 041 as excitation to provide accurate current for a tested outgoing line, outputs constant 20mA current, and has the highest voltage of 1000V (meets the insulation resistance voltage test requirement).

In a specific embodiment, as shown in fig. 3, the phase resistance measurement branch includes a first voltage-stabilizing differential sampling circuit 042, and a phase resistance measurement matching resistor 043 is connected in parallel between two ends of the first voltage-stabilizing differential sampling circuit 042;

after the phase resistance measurement matching resistor 043 is connected in parallel with the first voltage-stabilizing differential sampling circuit 042, one end of the phase resistance measurement matching resistor is connected to the high-voltage constant-current source 041 through a first wire, and the other end of the phase resistance measurement matching resistor is connected with the interface module 02 through a second wire;

the first lead is provided with a first relay K1, and/or the second lead is provided with a second relay K2, and the disconnection or connection of the first relay K1 and the second relay K2 is controlled by the control and driving module 01.

In a specific embodiment, as shown in fig. 3, the insulation resistance measurement branch includes an insulation resistance measurement matching resistor 044, one end of the insulation resistance measurement matching resistor 044 is connected with the high-voltage constant current source 041 through a third wire, the other end of the insulation resistance measurement matching resistor 044 is connected with one end of the matching resistor, and the other end of the matching resistor is connected with the interface module 02 through a fourth wire;

A second voltage-stabilizing differential sampling circuit 045 is connected in parallel between two ends of the matching resistor;

and a third relay K3 is arranged on the third wire, and/or a fourth relay K4 is arranged on the fourth wire, and the switching-on or switching-off of the third relay K3 and the fourth relay K4 is controlled by the control and driving module 01.

In a specific embodiment, as shown in fig. 3, the rotary resistance measurement branch includes a third voltage-stabilizing differential sampling circuit 047, and a rotary resistance measurement matching resistor 046 is connected in parallel between two ends of the third voltage-stabilizing differential sampling circuit 047;

after the third voltage-stabilizing differential sampling circuit 047 is connected with the rotary resistance measurement matching resistor 046 in parallel, one end of the third voltage-stabilizing differential sampling circuit is connected with the high-voltage constant current source 041 through a fifth wire, and the other end of the third voltage-stabilizing differential sampling circuit is connected with the interface module 02 through a sixth wire;

and a fifth relay K5 is arranged on the fifth wire, and/or a sixth relay is arranged on the sixth wire, and the disconnection or connection of the fifth relay K5 and the sixth relay K6 is controlled by the control and drive module 01.

In the above embodiment, the tested outgoing lines are classified into three types according to the resistance conditions of the tested outgoing lines of different types, specifically, the resistance of the first resistor between any two of the three phase lines is within a few ohms, the phase resistance measurement matching resistor 043 is a 69 Ω high-precision sampling resistor, after the phase resistance measurement matching resistor 043 is connected into a circuit, the voltage of the high-voltage constant current source 041 can be used for judging whether the connected voltage is two of the three phase lines or not through sampling voltage, and the sampling voltage is read through the first voltage-stabilizing differential sampling circuit 042; the insulation resistance measurement matching resistor 044 is a 50KΩ/5W power resistor, after the insulation resistance measurement matching resistor 044 is connected into a circuit, sampling voltage is read through a second voltage stabilizing differential sampling circuit 045, and whether the connected three-phase line and the shell line are connected or not is judged according to the sampling voltage; the high-precision sampling resistor with 16 omega is selected as the matching resistor 046 for the measurement of the rotary resistor, after the matching resistor 046 for the measurement of the rotary resistor is connected into a circuit, the sampling voltage is read through the third voltage-stabilizing differential sampling circuit 047, and whether the connected type is the same type of rotary transformer or not is judged through the sampling voltage. The phase resistance measurement matching resistor 043 access circuit, the insulation resistance measurement matching resistor 044 access circuit and the rotary resistance measurement matching resistor 046 access circuit are realized by switching the first relay K1, the second relay K2, the third relay K3, the fourth relay K4, the fifth relay K5 and the sixth relay K6, and the first relay K1, the second relay K2, the third relay K3, the fourth relay K4, the fifth relay K5 and the sixth relay K6 are controlled by the control and driving module 01.

In a specific embodiment, as shown in fig. 4, the interface module 02 includes a first interface 021, a second interface 022, a third interface 023, a fourth interface 024, a fifth interface 025, a sixth interface 026, a seventh interface 027, an eighth interface 028, a ninth interface 029, and a tenth interface 020 for connecting with the outgoing line of the dc brushless motor; wherein:

the first interface 021 is connected with a resistance measurement port+ of the resistance measurement module 04 through a seventh relay K7;

the second interface 022 is connected with a resistance measurement port+ of the resistance measurement module 04 through an eighth relay K8, and the second interface 022 is connected with the resistance measurement port of the resistance measurement module 04 through a tenth relay K10;

the third interface 023 is connected with the resistance measurement port+ of the resistance measurement module 04 through a ninth relay K9, and the third interface 023 is connected with the resistance measurement port of the resistance measurement module 04 through an eleventh relay K11;

the fourth interface 024 is connected via a twelfth relay K12 to a resistance measurement port of the resistance measurement module 04;

the fifth interface 025 is connected with a resistance measurement port+ of the resistance measurement module 04 through a thirteenth relay K13;

The sixth interface 026 is connected with the resistance measurement port of the resistance measurement module 04 through a fourteenth relay K14, and the sixth interface 026 is connected with the resistance measurement port of the resistance measurement module 04 through a nineteenth relay K19;

the seventh interface 027 is connected with the resistance measurement port of the resistance measurement module 04 through a fifteenth relay K15, and the seventh interface 027 is connected with the resistance measurement port of the resistance measurement module 04 through a twentieth relay K20;

the eighth interface 028 is connected with the resistance measurement port of the resistance measurement module 04 through a sixteenth relay K16, and the eighth interface 028 is connected with the resistance measurement port of the resistance measurement module 04 through a twenty first relay K21;

the ninth interface 029 is connected with the resistance measurement port of the resistance measurement module 04 through a seventeenth relay K17, and the ninth interface 029 is connected with the resistance measurement port of the resistance measurement module 04 through a twenty second relay K22;

the tenth interface 020 is connected to the resistance measurement port of the resistance measurement module 04 via an eighteenth relay K18, and the tenth interface 020 is connected to the resistance measurement port of the resistance measurement module 04 via a thirteenth relay K23.

In the above-described embodiment, different relays are connected through the respective interfaces of the interface module 02, so that connection of the lead-out wires of the dc brushless motor 07 connected to some of the interfaces of the interface module 02 to the resistance measuring module can be achieved by controlling the connection or disconnection of the relays.

Specifically, first, ten outgoing lines of the dc brushless motor are connected to ten interfaces of the interface module 02, and then, corresponding relays are closed as required, for example:

when the outgoing line connected with the first interface and the outgoing line connected with the second interface are required to be connected to the resistance measurement module through the interface module 02, the seventh relay K7 and the tenth relay K10 are closed; when the outgoing line connected with the first interface and the outgoing line connected with the third interface are required to be connected to the resistance measurement module through the interface module 02, the seventh relay K7 and the eleventh relay K11 are closed; when the outgoing line connected with the first interface and the outgoing line connected with the fourth interface are required to be connected to the resistance measurement module through the interface module 02, the seventh relay K7 and the twelfth relay K12 are closed; when the outgoing line connected with the first interface and the outgoing line connected with the sixth interface are required to be connected to the resistance measurement module through the interface module 02, the seventh relay K7 and the nineteenth relay K19 are closed; when the outgoing line connected with the first interface and the outgoing line connected with the seventh interface are required to be connected to the resistance measurement module through the interface module 02, the seventh relay K7 and the twentieth relay K20 are closed; when the outgoing line connected with the first interface and the outgoing line connected with the eighth interface are required to be connected to the resistance measurement module through the interface module 02, the seventh relay K7 and the twenty-first relay K21 are closed; when the outgoing line connected with the first interface and the outgoing line connected with the ninth interface are required to be connected to the resistance measurement module through the interface module 02, the seventh relay K7 and the twenty-second relay K22 are closed; when the outgoing line connected with the first interface and the outgoing line connected with the tenth interface are required to be connected to the resistance measurement module through the interface module 02, the seventh relay K7 and the twenty-third relay K23 are closed;

When the outgoing line connected with the second interface and the outgoing line connected with the third interface are required to be connected to the resistance measurement module through the interface module 02, the eighth relay K8 and the eleventh relay K11 are closed; when the outgoing line connected with the second interface and the outgoing line connected with the fourth interface are required to be connected to the resistance measurement module through the interface module 02, the eighth relay K8 and the twelfth relay K12 are closed; when the outgoing line connected with the second interface and the outgoing line connected with the fifth interface are required to be connected to the resistance measurement module through the interface module 02, the tenth relay K10 and the thirteenth relay K13 are closed; when the outgoing line connected with the second interface and the outgoing line connected with the sixth interface are required to be connected to the resistance measurement module through the interface module 02, the eighth relay K8 and the nineteenth relay K19 are closed; when the outgoing line connected with the second interface and the outgoing line connected with the seventh interface are required to be connected to the resistance measurement module through the interface module 02, the eighth relay K8 and the twentieth relay K20 are closed; when the outgoing line connected with the second interface and the outgoing line connected with the eighth interface are required to be connected to the resistance measurement module through the interface module 02, the eighth relay K8 and the twenty-first relay K21 are closed; when the outgoing line connected with the second interface and the outgoing line connected with the ninth interface are required to be connected to the resistance measurement module through the interface module 02, the eighth relay K8 and the twenty-second relay K22 are closed; when the outgoing line connected with the second interface and the outgoing line connected with the tenth interface are required to be connected to the resistance measurement module through the interface module 02, the eighth relay K8 and the thirteenth relay K23 are closed;

When the outgoing line connected with the third interface and the outgoing line connected with the fourth interface are required to be connected to the resistance measurement module through the interface module 02, the ninth relay K9 and the twelfth relay K12 are closed; when the outgoing line connected with the third interface and the outgoing line connected with the fifth interface are required to be connected to the resistance measurement module through the interface module 02, the eleventh relay K11 and the thirteenth relay K13 are closed; when the outgoing line connected with the third interface and the outgoing line connected with the sixth interface are required to be connected to the resistance measurement module through the interface module 02, the ninth relay K9 and the nineteenth relay K19 are closed; when the outgoing line connected with the third interface and the outgoing line connected with the seventh interface are required to be connected to the resistance measurement module through the interface module, the ninth relay K9 and the twentieth relay K20 are closed; when the outgoing line connected with the third interface and the outgoing line connected with the eighth interface are required to be connected to the resistance measurement module through the interface module, the ninth relay K9 and the eleventh relay K21 are closed; when the outgoing line connected with the third interface and the outgoing line connected with the ninth interface are required to be connected to the resistance measurement module through the interface module, the ninth relay K9 and the twenty-second relay K22 are closed; when the outgoing line connected with the third interface and the outgoing line connected with the tenth interface are required to be connected to the resistance measurement module through the interface module, the ninth relay K9 and the thirteenth relay K23 are closed;

When the outgoing line connected with the fourth interface and the outgoing line connected with the fifth interface are required to be connected to the resistance measurement module through the interface module, the twelfth relay K12 and the thirteenth relay K13 are closed; when the outgoing line connected with the fourth interface and the outgoing line connected with the sixth interface are required to be connected to the resistance measurement module through the interface module, the twelfth relay K12 and the fourteenth relay K14 are closed; when the outgoing line connected with the fourth interface and the outgoing line connected with the seventh interface are required to be connected to the resistance measurement module through the interface module, the twelfth relay K12 and the fifteenth relay K15 are closed; when the outgoing line connected with the fourth interface and the outgoing line connected with the eighth interface are required to be connected to the resistance measurement module through the interface module, the twelfth relay K12 and the sixteenth relay K16 are closed; when the outgoing line connected with the fourth interface and the outgoing line connected with the ninth interface are required to be connected to the resistance measurement module through the interface module, the twelfth relay K12 and the seventeenth relay K17 are closed; when the outgoing line connected with the fourth interface and the outgoing line connected with the tenth interface are required to be connected to the resistance measurement module through the interface module, the twelfth relay K12 and the eighteenth relay K18 are closed;

When the outgoing line connected with the fifth interface and the outgoing line connected with the sixth interface are required to be connected to the resistance measurement module through the interface module, the thirteenth relay K13 and the nineteenth relay K19 are closed; when the outgoing line connected with the fifth interface and the outgoing line connected with the seventh interface are required to be connected to the resistance measurement module through the interface module, the thirteenth relay K13 and the twentieth relay K20 are closed; when the outgoing line connected with the fifth interface and the outgoing line connected with the eighth interface are required to be connected to the resistance measurement module through the interface module, the thirteenth relay K13 and the eleventh relay K21 are closed; when the outgoing line connected with the fifth interface and the outgoing line connected with the ninth interface are required to be connected to the resistance measurement module through the interface module, the thirteenth relay K13 and the twenty-second relay K22 are closed; when the outgoing line connected with the fifth interface and the outgoing line connected with the tenth interface are required to be connected to the resistance measurement module through the interface module, the thirteenth relay K13 and the thirteenth relay K23 are closed;

when the outgoing line connected with the sixth interface and the outgoing line connected with the seventh interface are required to be connected to the resistance measurement module through the interface module, the fourteenth relay K14 and the twentieth relay K20 are closed; when the outgoing line connected with the sixth interface and the outgoing line connected with the eighth interface are required to be connected to the resistance measurement module through the interface module, the fourteenth relay K14 and the eleventh relay K21 are closed; when the outgoing line connected with the sixth interface and the outgoing line connected with the ninth interface are required to be connected to the resistance measurement module through the interface module, the fourteenth relay K14 and the twenty-second relay K22 are closed; when the outgoing line connected with the sixth interface and the outgoing line connected with the tenth interface are required to be connected to the resistance measurement module through the interface module, the fourteenth relay K14 and the thirteenth relay K23 are closed;

When the outgoing line connected with the seventh interface and the outgoing line connected with the eighth interface are required to be connected to the resistance measurement module through the interface module, the fifteenth relay K15 and the eleventh relay K21 are closed; when the outgoing line connected with the seventh interface and the outgoing line connected with the ninth interface are required to be connected to the resistance measurement module through the interface module, the fifteenth relay K15 and the twenty-second relay K22 are closed; when the outgoing line connected with the seventh interface and the outgoing line connected with the tenth interface are required to be connected to the resistance measurement module through the interface module, the fifteenth relay K15 and the thirteenth relay K23 are closed;

when the outgoing line connected with the eighth interface and the outgoing line connected with the ninth interface are required to be connected to the resistance measurement module through the interface module, the sixteenth relay K16 and the twenty-second relay K22 are closed; when the outgoing line connected with the eighth interface and the outgoing line connected with the tenth interface are required to be connected to the resistance measurement module through the interface module, the sixteenth relay K16 and the thirteenth relay K23 are closed;

when the outgoing line connected with the ninth interface and the outgoing line connected with the tenth interface are required to be connected to the resistance measurement module through the interface module, the seventeenth relay K17 and the thirteenth relay K23 are closed;

By the above-described manner, in addition to the fact that two lead wires connected to the first interface and the fifth interface cannot be simultaneously connected to the resistance measurement module, it is possible to realize that the other two-by-two combinations of ten lead wires are connected to the resistance measurement module, if the two lead wires connected to the first interface and the fifth interface are just two of the three-phase lines, by exchanging the lead wires connected to the fifth interface with the other lead wires (the lead wires connected to the fifth interface cannot be exchanged with the lead wires connected to the first interface);

through the switching, three phase lines, a shell line, three types of rotary change lines and corresponding first resistors, second resistors and third resistors can be obtained.

In a specific embodiment, the sixth interface 026 is connected to the exciting positive port of the rotary decoding module 03 through a twenty-fourth relay K24, and the seventh interface 027 is connected to the exciting negative port of the rotary decoding module 03 through a twenty-fifth relay K25;

the seventh interface 027 is connected with the sin+ port of the rotary decoding module 03 through a twenty-sixth relay K26, and the eighth interface 028 is connected with the sin+ port of the rotary decoding module 03 through a twenty-seventh relay K27;

The eighth interface 028 is connected with the Sin-port of the rotary decoding module 03 through a twenty-eighth relay K28, and the seventh interface 027 is connected with the Sin-port of the rotary decoding module 03 through a twenty-ninth relay K29;

the ninth interface 029 is connected with the cos+ port of the rotary decoding module 03 through a thirty-first relay K30, and the tenth interface 020 is connected with the cos+ port of the rotary decoding module 03 through a thirty-first relay K31;

the tenth interface 020 is connected to the Cos-port of the rotary decoding module 03 through a third twelve relay K32, and the ninth interface is connected to the Cos-port of the rotary decoding module 03 through a thirty-third relay K33.

The rotary change line can be divided into three pairs through the connection of the outgoing line and the resistance measurement module: the method comprises the steps that a magnet-excited rotating wire, a Sin rotating wire or a Cos rotating wire is excited, positive and negative conditions corresponding to two wires of the Sin rotating wire or positive and negative conditions corresponding to two wires of the Cos rotating wire are judged, the rotating wire is required to be connected with a rotating decoding module, specifically, firstly, a control and driving module 01 is used for controlling to close a twenty-four relay K24, a twenty-five relay K25, a twenty-sixteen relay K26, a twenty-eighth relay K28, a thirty-eighth relay K30 and a thirty-twelve relay K32, so that the rotating wire is connected to a corresponding interface of the rotating decoding module, whether the connection is correct or not is detected through a rotating phase sequence detection module, if the connection is correct, the rotating wire can be judged to be the sin+ rotating wire connected with a sin+ port of the rotating decoding module, and the sin+ wire connected with a cos+ port of the rotating decoding module is the cos+ rotating wire connected with the cos+ port of the rotating decoding module, and the Cos wire connected with the Sin-port of the rotating decoding module is the Cos-rotating wire; otherwise, two outgoing lines connected with the sin+ port and the Sin-port and/or two outgoing lines connected with the cos+ port and the Cos-port need to be replaced, specifically, the twenty-fourth relay K24, the twenty-fifth relay K25, the twenty-seventeenth relay K27, the twenty-ninth relay K29, the thirty-eighth relay K30 and the thirty-eighth relay K32 are controlled to be closed by the control and driving module 01, which is equivalent to replacing the two outgoing lines connected with the sin+ port and the Sin-port; the twenty-fourth relay K24, the twenty-fifth relay K25, the twenty-sixth relay K26, the twenty-eighth relay K28, the thirty-first relay K31 and the thirty-third relay K33 are controlled to be closed through the control and driving module 01, and two outgoing lines connected with the Cos+ port and the Cos-port are exchanged.

In a specific embodiment, the first interface 021 is connected to the a port of the control and driving module 01 through a thirty-fourth relay K34;

the second interface 022 is connected with the B port of the control and driving module 01 through a thirty-fifth relay K35;

the third interface 023 is connected to the C-port of the control and drive module 01 via a thirty-sixth relay K36.

In this embodiment, the thirty-four relay K34, the thirty-five relay K35 and the thirty-six relay K36 are used to determine whether the power failure can normally operate after each outgoing line has been determined, specifically, whether the power failure can normally operate includes driving the motor by a positional algorithm, determining whether the power failure can normally operate, and determining whether the power failure can normally operate by a non-positional algorithm driving motor, when the thirty-four relay K34, the thirty-five relay K35 and the thirty-six relay K36 are closed, the state of the non-positional algorithm driving motor is assumed, when the other relays are opened, the thirty-four relay K34, the thirty-five relay K35 and the thirty-six relay K36 are closed, and when the determined rotary lines are connected to corresponding interfaces of the rotary decoding module, the state of the positional algorithm driving motor is assumed.

The invention further provides a DC brushless motor assembly test method, as shown in fig. 5, comprising the following steps:

each interface of the interface module is respectively connected with an outgoing line of a direct current brushless motor; the interfaces of the interface module comprise a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface, an eighth interface, a ninth interface and a tenth interface;

the interface module is controlled by the control and drive module 01, two outgoing lines connected with the interface module are connected to the resistance measurement module, the first relay K1 and the second relay K2 of the resistance measurement module are controlled to be closed, whether two lines of an access circuit are two of three-phase lines or not is judged, if yes, the two detected outgoing lines are marked, a first resistance between the two lines is displayed by the display module, if no, the outgoing lines of the access circuit are replaced by the control and drive module 01 and judged again until the three-phase lines and the first resistance between any two three-phase lines are obtained; specifically, according to the resistance range between any two three-phase lines, the constant current source voltage and the size of the matching resistor, whether two lines connected to the circuit are two of the three-phase lines or not is judged through sampling voltage.

The interface module is controlled by the control and drive module 01, so that one of three phase lines and the other outgoing line except the three phase lines are connected to the resistance measurement module, the third relay K3 and the fourth relay K4 of the resistance measurement module are controlled to be closed, whether the connected other outgoing line is a shell line or not is judged, if yes, a second resistor between the phase line and the shell is displayed by the display module, if no, the other outgoing line of the connection circuit is controlled to be replaced by the control and drive module 01 and judged again until the shell line is obtained and marked; specifically, according to the resistance range between any one of the three phase lines and the ground, the matching resistance and the magnitude of the constant current source voltage, judging whether the other connected outgoing line is a shell line or not according to the sampling voltage;

the interface module is controlled by the control and drive module 01, so that each of the other two three-phase lines is connected to the resistance measurement module together with the shell wire respectively, the third relay K3 and the fourth relay K4 of the resistance measurement module are controlled to be closed, and the second resistance between the phase line and the shell is displayed by the display module;

the interface module is controlled by the control and drive module 01, so that two outgoing lines except for a three-phase line and a shell line are connected to the resistance measurement module, a fifth relay K5 and a sixth relay K6 of the resistance measurement module are controlled to be closed, whether the two outgoing lines of the access circuit are identical in rotation is judged, if so, the rotation phase sequences of the two outgoing lines are displayed by the display module, a third resistor between the two outgoing lines is displayed by the display module, and if not, the outgoing lines of the access circuit are controlled to be replaced by the control and drive module 01 and judged again until three pairs of rotation lines and three groups of third resistors are obtained; specifically, according to the resistance range, the matching resistance and the constant current source voltage of the three pairs of rotary change lines, judging which type of rotary change line is connected according to the sampling voltage;

The interface module is controlled by the control and drive module 01, so that a pair of excitation outgoing lines are connected to the excitation positive port and the excitation negative port of the rotary decoding module, the interface module is controlled by the control and drive module 01, so that Sin rotary wires are connected to the sin+ port and the Sin-port, cos rotary wires are connected to the cos+ port and the Cos-port, the rotary phase sequence detection module judges whether the rotary connection method at the moment is correct, if the rotary phase sequence is correct, the corresponding rotary phase sequence is marked, if the rotary phase sequence is incorrect, the Sin rotary wires connected to the sin+ port and the Sin-port are exchanged by the control and drive module 01, and/or the Cos rotary wires connected to the cos+ port and the Cos-port are exchanged by the control and drive module 01, and the rotary phase sequence detection module judges whether the rotary connection method at the moment is correct again, and when the rotary phase sequence is judged to be correct, the corresponding rotary phase sequence is marked.

In an optional manner, the determining, by the phase sequence detecting module, whether the rotational phase sequence is correct further includes:

reading data of n timer periods provided by a rotary transformation decoding module, and storing the data into an input array S1 after recursive average filtering, wherein n is more than or equal to 500; for example, in the specific implementation, n takes a value of 500;

intercepting m complete period data from the stored data according to the obtained maximum value and minimum value, and storing the data in a new array S2, wherein m is more than or equal to 3 and m is less than 500; for example, in the specific implementation, m takes on the value 30

The data of each period of the array S2 are subjected to slope calculation by a two-point method, M slope results are obtained, the maximum value and the minimum value in the M slope results are removed, and the average value is taken and recorded as a first average value M1;

changing the rotating speed of the motor, and repeating the steps to obtain a second average value M2 and a third average value M3;

if the sum of the first average value M1, the second average value M2 and the third average value M3 is larger than a set threshold value, judging that the spin-on method at the moment is correct, otherwise, judging that the spin-on method at the moment is wrong; in the specific implementation, the set threshold is 13.8.

In an alternative, after the completion of the labeling of the phase sequence of the rotation change, the method further comprises:

the motor is driven by a non-position driving algorithm and a position driving algorithm, and the performance of the motor is judged; specifically, when the thirty-four relay K34, the thirty-five relay K35 and the thirty-six relay K36 are closed and the other relays are opened, the motor is driven by the position algorithm, and when the thirty-four relay K34, the thirty-five relay K35 and the thirty-six relay K36 are closed and the determined rotary transformation line is connected to the corresponding interface of the rotary transformation decoding module, the other relays are opened, the motor is driven by the position algorithm.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

Furthermore, the terms "a," "an," "the" and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is two or more unless specifically defined otherwise.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A brushless dc motor assembly test system, comprising:

the resistance measurement module is used for dividing outgoing lines of the direct-current brushless motor into three types of three-phase lines, a shell line and a rotary transformation line by measurement, measuring a first resistance between any two phase lines of the three-phase lines, measuring a second resistance of each line of the three-phase lines of the direct-current brushless motor to the ground, and measuring a third resistance between outgoing lines of the rotary transformation line, which have the same pair of the rotary transformation;

The display module is used for displaying the rotation phase sequence of the rotation line connected to the rotation decoding module when the rotation line is correctly connected to the rotation decoding module; wherein:

the rotation phase sequence detection module judges whether a rotation line is correctly connected to the rotation decoding module further comprises: reading data of n timer periods provided by a rotary transformation decoding module, and storing the data into an input array S1 after recursive average filtering, wherein n is more than or equal to 500; obtaining a maximum value and a minimum value of the data stored in the array S1; intercepting m complete period data from the stored data according to the obtained maximum value and minimum value, and storing the data in a new array S2, wherein m is more than or equal to 3 and m is less than 500; calculating the slope of the data of each period of the array S2 by a two-point method to obtain m slope results, removing the maximum value and the minimum value in the m slope results, taking an average value, and recording the average value as a first average value; changing the rotating speed of the motor, and repeating the steps to obtain a second average value and a third average value; if the sum of the first average value, the second average value and the third average value is larger than a set threshold value, the spin-on method at the moment is judged to be correct, otherwise, the spin-on method at the moment is judged to be incorrect.

2. The system of claim 1, wherein the resistance measurement module comprises a phase resistance measurement branch, an insulation resistance measurement branch, and a spin-on resistance measurement branch, one ends of the phase resistance measurement branch, the insulation resistance measurement branch, and the spin-on resistance measurement branch are all connected to a high-voltage constant current source, and the other ends of the phase resistance measurement branch, the insulation resistance measurement branch, and the spin-on resistance measurement branch are all connected to the interface module.

3. The system of claim 2, wherein the phase resistance measurement branch comprises a first voltage-stabilizing differential sampling circuit, and a phase resistance measurement matching resistor is connected in parallel between two ends of the first voltage-stabilizing differential sampling circuit;

4. The direct current brushless motor assembly test system according to claim 2, wherein the insulation resistance measurement branch comprises an insulation resistance measurement matching resistor, one end of the insulation resistance measurement matching resistor is connected with the high-voltage constant current source through a third wire, the other end of the insulation resistance measurement matching resistor is connected with one end of the matching resistor, and the other end of the matching resistor is connected with the interface module through a fourth wire;

5. The system according to claim 2, wherein the rotary resistance measuring branch comprises a third voltage stabilizing differential sampling circuit, and a rotary resistance measuring matching resistor is connected in parallel between two ends of the third voltage stabilizing differential sampling circuit;

6. The brushless dc motor assembly test system of claim 1, wherein the interface module comprises a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface, an eighth interface, a ninth interface, and a tenth interface for connection with the lead-out wires of the brushless dc motor; wherein:

7. The brushless dc motor assembly test system according to claim 6, wherein the sixth interface is connected to the excitation positive port of the resolver decoding module through a twenty-four relay, and the seventh interface is connected to the excitation negative port of the resolver decoding module through a twenty-five relay;

8. The brushless dc motor assembly test system according to claim 7, wherein the first interface is connected to an a port of the control and drive module through a thirty-four relay;

9. A method for assembling and testing a brushless dc motor, wherein the method employs the system for assembling and testing a brushless dc motor according to claim 1, the method comprising: