Motor slip ring stator conductor and rotor conductor continuity test device and test method

Abstract

The present invention belongs to the field of testing technology, and relates to a motor slip ring stator wire and rotor wire on-off test device and test method. The test device includes: a 4-way optocoupler isolation relay module, whose normally closed interface is connected to the motor slip ring stator wire, and whose common interface is connected to the motor slip ring rotor wire; a microcontroller, which is respectively connected to the control interface, normally closed interface and common interface of the 4-way optocoupler isolation relay module, and the microcontroller includes a judgment module, which is used to judge whether the motor slip ring stator wire and the rotor wire are connected according to whether the level state of the common interface is consistent with the level state of the normally closed interface; an LED display module, which is electrically connected to the microcontroller to display the on-off state of the motor slip ring stator wire and the rotor wire through the brightness of the LED; a power supply module, which provides working voltage for the 4-way optocoupler isolation relay module and the microcontroller. The present invention can detect the on-off of the motor slip ring stator wire and the rotor wire in real time and batch, and has high detection efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of motor testing, relates to motor slip ring testing technology, and in particular to a motor slip ring stator wire and rotor wire continuity testing device and a testing method. Background Art

[0002] The motor slip ring is a device that connects the motor rotor and stator. Its function is to transfer the electric energy of the rotor rotation to the stator. Specifically, the motor slip ring can make the current between the motor rotor and the motor stator seamlessly transfer, thereby achieving efficient energy conversion. In addition, the motor slip ring can also stabilize the operation of the motor and prevent the motor from malfunctioning due to unstable current. In order to ensure the normal operation of the motor, it is necessary to detect the continuity of the motor slip ring stator wire and the rotor wire to determine whether the motor slip ring stator wire and the rotor wire can normally connect the motor rotor and the motor stator, and ensure the seamless transmission of current between the motor rotor and the motor stator.

[0003] At present, the testing method for detecting the continuity of the stator wire and the rotor wire of the motor slip ring is that the test personnel use a multimeter to perform a one-to-one test. On the one hand, there is a problem of low test efficiency. On the other hand, when testing wires in large quantities, it takes a long time and cannot guarantee the real-time detection. In addition, the operation is cumbersome and the workload is large. Summary of the invention

[0004] In view of the deficiencies in the related art, the purpose of the present invention is to provide a motor slip ring stator wire and rotor wire continuity test device and test method, which can batch detect the continuity of motor slip ring stator wire and rotor wire in real time with high detection efficiency, and solves the problems of low efficiency and poor real-time performance of existing test methods.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A first aspect of the present invention provides a motor slip ring stator conductor and rotor conductor continuity test device, comprising:

[0007] A 4-way optocoupler isolation relay module, whose normally closed interface is connected to the motor slip ring stator wire, and whose public interface is connected to the motor slip ring rotor wire, when the control interface of the 4-way optocoupler isolation relay module is at a low level, the normally closed interface is short-circuited with the public interface;

[0008] A microcontroller, wherein the microcontroller is connected to the control interface of the 4-way optical coupling isolation relay module to enable the control interface to be at a low level; the controller is respectively connected to the normally closed interface and the common interface to set the level state of the normally closed interface and obtain the level state of the common interface; the microcontroller includes a judgment module, and the judgment module is used to judge whether the stator wire of the motor slip ring is connected to the rotor wire according to whether the level state of the common interface is consistent with the level state of the normally closed interface;

[0009] An LED display module is electrically connected to the microcontroller, and the microcontroller controls the brightness of an LED in the LED display module according to a judgment result of the judgment module and the acquired normally closed interface level state to display the on / off state of the stator wire and the rotor wire of the motor slip ring;

[0010] A power supply module provides operating voltage for the 4-way optical coupling isolation relay module and the microcontroller.

[0011] In some embodiments, the microcontroller has pin PA3, pin PB11, pin PB12, pin PB13, pin PB14, pin PE5, pin PE6, pin PE7, pin PE9, pin PE10, pin PE11, pin PE13, pin PE14, and pin PE15; the pin PA3 is connected to the optocoupler power supply module in the power supply module; the pin PB11, pin PB12, pin PB13, and pin PB14 are connected to the LED display module to control the brightness of the LED in the LED display module; the pin PE5, pin PE6, and pin PE7 are connected to the normally closed interface, the pin PE9, pin PE10, and pin PE11 are connected to the common interface, and the pin PE13, pin PE14, and pin PE15 are connected to the control interface.

[0012] In some embodiments, the normally closed interface includes a normally closed interface NC0 connected to the pin PE7, a normally closed interface NC1 connected to the pin PE6, and a normally closed interface NC2 connected to the pin PE5, wherein the normally closed interface NC0 is used to connect the first motor slip ring stator wire, the normally closed interface NC1 is used to connect the second motor slip ring stator wire, and the normally closed interface NC2 is used to connect the third motor slip ring stator wire;

[0013] The common interface includes a common interface COM0 connected to the pin PE11, a common interface COM1 connected to the pin PE10, and a common interface COM2 connected to the pin PE9, wherein the common interface COM0 is used to connect the first motor slip ring rotor wire, the common interface COM1 is used to connect the second motor slip ring rotor wire, and the common interface COM2 is used to connect the third motor slip ring rotor wire;

[0014] The control interface includes a control interface IN0, a control interface IN1, and a control interface IN2, wherein the control interface IN0 is connected to the pin PE15, the control interface IN1 is connected to the pin PE14, and the control interface IN2 is connected to the pin PE13;

[0015] When the control interface of the 4-way optocoupler isolation relay module is at a low level, the normally closed interface NC0 is short-circuited with the common interface COM0, the normally closed interface NC1 is short-circuited with the common interface COM1, and the normally closed interface NC2 is short-circuited with the common interface COM2.

[0016] In some embodiments, the LED display module includes three parallel LED display circuits, the first LED display circuit is connected to the pin PB11 to display the brightness of the light-emitting diode LED1 in the first LED display circuit according to the level state of the pin PB11 enabled by the microcontroller; the second LED display circuit is connected to the pin PB12 to display the brightness of the light-emitting diode LED2 in the second LED display circuit according to the level state of the pin PB12 enabled by the microcontroller; the third LED display circuit is connected to the pin PB13 to display the brightness of the light-emitting diode LED3 in the third LED display circuit according to the level state of the pin PB13 enabled by the microcontroller.

[0017] In some embodiments, the first LED display circuit includes a resistor R8 and a light emitting diode LED1, one end of the resistor R8 is connected to the pin PB11, the other end is connected to one end of the light emitting diode LED1, and the other end of the light emitting diode LED1 is grounded;

[0018] The second LED display circuit comprises a resistor R9 and a light emitting diode LED2, one end of the resistor R9 is connected to the pin PB12, the other end is connected to one end of the light emitting diode LED2, and the other end of the light emitting diode LED2 is grounded;

[0019] The third LED display circuit comprises a resistor R11 and a light emitting diode LED3. One end of the resistor R11 is connected to the pin PB13, and the other end is connected to one end of the light emitting diode LED3. The other end of the light emitting diode LED3 is grounded.

[0020] In some embodiments, the power supply module includes:

[0021] The power module is connected to an external power supply, converts the external power supply voltage into a 5V voltage and outputs it;

[0022] An optocoupler power supply module, whose voltage input end is connected to the voltage output end of the power supply module, and whose voltage output end is connected to the power input end of the 4-way optocoupler isolation relay module, to provide working voltage for the 4-way optocoupler isolation relay module;

[0023] A microcontroller power supply module has a voltage input terminal connected to a voltage output terminal of the power supply module, and a voltage output terminal connected to a power pin of the microcontroller to provide a working voltage for the microcontroller.

[0024] In some embodiments, the power module includes a connector XP9, a MOS tube Q3, a shunt amplifier U3 and a voltage regulator U1 that outputs a 5V voltage, and the connector XP9 is used to connect an external power supply;

[0025] The connector XP9 has four output pins, pin 3 is connected to pin 1, and pins 2 and 4 are grounded;

[0026] The drain of the MOS transistor Q3 is connected to the pin 1 of the connector XP9 and is grounded through the capacitor C79; the gate of the MOS transistor Q3 is grounded through the resistor R71, and the source of the MOS transistor Q3 is grounded through the capacitor C10 and the polarized capacitor C17 connected in parallel;

[0027] The pin IN+ of the shunt amplifier U3 is connected to the source of the MOS tube Q3, and is grounded through the resistor R4, the resistor R19 and the light-emitting diode V3 connected in series in sequence; the pin GND of the shunt amplifier U3 is grounded;

[0028] Pin IN of the voltage regulator U1 is connected to pin IN- of the shunt amplifier U3, and is grounded through capacitors C12 and C13 connected in parallel; pin PG of the voltage regulator U1 is connected to an optocoupler power supply module and a microcontroller power supply module, and is grounded through capacitors C15 and C16 connected in parallel, and pin OUT of the voltage regulator U1 is connected to pin PG of the voltage regulator U1.

[0029] In some embodiments, the optocoupler power supply module includes:

[0030] A control interface connected to the pin PA3 of the microcontroller so that the microcontroller controls the optocoupler power supply module to provide a working voltage for the 4-way optocoupler isolation relay module;

[0031] MOS tube Q2, the source of the MOS tube Q2 is connected to the pin PG of the voltage regulator U1, and is connected to the gate of the MOS tube Q2 through a resistor R4; the drain of the MOS tube Q2 is connected to the power input end of the 4-way optical coupling isolation relay module;

[0032] Transistor V3, the base of the transistor V3 is connected to the control interface through a resistor R6, the collector of the transistor V3 is connected to the gate of the MOS tube Q2, the emitter of the transistor V3 is grounded, and is connected to the base of the transistor V3 through a resistor R7.

[0033] In some embodiments, the microcontroller power supply module includes a voltage regulator U2 that outputs a 3.3V voltage, wherein the pin VIN of the voltage regulator U2 is connected to the pin PG of the voltage regulator U1, and is grounded through capacitors C31 and C66 connected in parallel; the pin VOUT of the voltage regulator U2 is connected to the power input terminal of the microcontroller, and is grounded through capacitors C40 and C41 connected in parallel, and is grounded through a resistor R20 and a light-emitting diode V5 connected in series; the pin EN of the voltage regulator U2 is connected to the pin VIN of the voltage regulator U2.

[0034] A second aspect of the present invention provides a method for testing the continuity of a motor slip ring stator conductor and a rotor conductor, using the motor slip ring stator conductor and rotor conductor continuity testing device described in the first aspect of the present invention, the method comprising:

[0035] Dynamic measurement steps: when the motor rotates, the microcontroller enables the control interface IN0, the control interface IN1, and the control interface IN2 of the 4-way optocoupler isolation relay module to be low level, and enables the normally closed interface NC0, the normally closed interface NC1, and the normally closed interface NC2 of the 4-way optocoupler isolation relay module to be low level; at this time, the microcontroller determines whether the level sequence corresponding to the pin PE11, the pin PE10, and the pin PE9 of the microcontroller is low, high, and low; if the microcontroller determines that the level sequence corresponding to the pin PE11, the pin PE10, and the pin PE9 is low, high, and low, the microcontroller enables the pin PB11, the pin PB12, and the pin PB13 of the microcontroller to be high level, then the light-emitting diodes of the 3-way LED display circuit show a constantly bright state; if the microcontroller determines that the level sequence corresponding to the pin PE11, the pin PE10, and the pin PE9 is not low, high, and low, the microcontroller enables the pins with inconsistent levels among the pins PE11, the pin PE10, and the pin PE9 to be low level, then the light-emitting diodes of the LED display circuit corresponding to the pins show a dark state;

[0036] Static measurement steps: when the motor stops working, the controller enables the control interface IN0, the control interface IN1, and the control interface IN2 as low levels, and enables the normally closed interface NC0 as low level, the normally closed interface NC1 as high level, and the normally closed interface NC2 as low level; at this time, the microcontroller determines whether the level sequence corresponding to the pin PE11, the pin PE10, and the pin PE9 is low, high, and low; if the microcontroller determines that the level sequence corresponding to the pin PE11, the pin PE10, and the pin PE9 is low, high, and low, and the microcontroller enables the pin PB11, the pin PB12, and the pin PB13 as high levels, then the light-emitting diodes of the 3-way LED display circuit are in a normally bright state; if the microcontroller determines that the level sequence corresponding to the pin PE11, the pin PE10, and the pin PE9 is not low, high, and low, and the microcontroller enables the pins with inconsistent levels among the pins PE11, the pin PE10, and the pin PE9 as low levels, then the light-emitting diodes of the LED display circuit corresponding to the pins are in a dark state.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. The motor slip ring stator wire and rotor wire continuity test device provided by the present invention adopts a modular design, is small in size, easy to move, can be plugged in and used at any time, and can batch detect the continuity of the motor slip ring stator wire and the rotor wire in real time. Compared with the existing method of using a multimeter to test, it has high detection efficiency and good real-time performance, and has high practical application value.

[0039] 2. The motor slip ring stator wire and rotor wire continuity test method provided by the present invention covers the motor dynamic test and the motor static test. The judgment basis is reasonable, and the test result is displayed by the brightness of the LED. Compared with the existing multimeter test method, it is smarter, more intuitive, simple and convenient, and can test the continuity of multiple wires at one time, thereby improving work efficiency and having good real-time detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0041] Figure 1 This is a control principle block diagram of the on-off test device for the stator conductor and rotor conductor of the motor slip ring according to an embodiment of the present invention;

[0042] Figure 2 A circuit schematic diagram of a microcontroller according to an embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of the interface of the 4-way optocoupler isolation relay module according to an embodiment of the present invention;

[0044] Figure 4 This is a circuit diagram of the LED display module according to an embodiment of the present invention;

[0045] Figure 5 A circuit schematic diagram of a power module according to an embodiment of the present invention;

[0046] Figure 6 This is a circuit schematic diagram of the optocoupler power supply module according to an embodiment of the present invention;

[0047] Figure 7 This is a circuit schematic diagram of a microcontroller power supply module according to an embodiment of the present invention;

[0048] Figure 8 The present invention is a flowchart of a method for testing the continuity of a motor slip ring stator conductor and a rotor conductor according to an embodiment of the present invention.

[0049] In the figure, 1. 4-way optocoupler isolation relay module, 2. microcontroller, 21. judgment module, 3. LED display module, 31. first LED display circuit, 32. second LED display circuit, 33. third LED display circuit, 4. power supply module, 41. power supply module, 42. optocoupler power supply module, 43. microcontroller power supply module, 5. external power supply. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0051] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] See attached Figures 1 to 5 The first aspect of the present invention provides an exemplary embodiment of a motor slip ring stator wire and rotor wire continuity test device, the motor slip ring stator wire and rotor wire continuity test device comprising:

[0054] A 4-way optocoupler isolation relay module 1, whose normally closed interface is connected to the motor slip ring stator wire, and whose common interface is connected to the motor slip ring rotor wire. When the control interface of the 4-way optocoupler isolation relay module is at a low level, the normally closed interface is short-circuited with the common interface;

[0055] A microcontroller 2, wherein the microcontroller 2 is connected to the control interface of the 4-way optical coupling isolation relay module 1 to enable the control interface to be at a low level; the microcontroller 2 is respectively connected to the normally closed interface and the common interface to set the level state of the normally closed interface and obtain the level state of the common interface; the microcontroller 2 includes a judgment module 21, and the judgment module 21 is used to judge whether the stator wire of the motor slip ring is connected to the rotor wire according to whether the level state of the common interface is consistent with the level state of the normally closed interface;

[0056] An LED display module 3 is electrically connected to the microcontroller 2, and the microcontroller 2 controls the brightness of the LED in the LED display module 3 according to the judgment result of the judgment module 21 and the acquired normally closed interface level state to display the on / off state of the motor slip ring stator wire and the rotor wire;

[0057] The power supply module 4 provides working voltage for the 4-way optical coupling isolation relay module 1 and the microcontroller 2 .

[0058] See also Figure 2The microcontroller has pin PA3, pin PB11, pin PB12, pin PB13, pin PB14, pin PE5, pin PE6, pin PE7, pin PE9, pin PE10, pin PE11, pin PE13, pin PE14, and pin PE15; the pin PA3 is connected to the optocoupler power supply module in the power supply module; the pin PB11, pin PB12, pin PB13, and pin PB14 are connected to the LED display module to control the brightness of the LED in the LED display module; the pin PE5, pin PE6, and pin PE7 are connected to the normally closed interface, the pin PE9, pin PE10, and pin PE11 are connected to the common interface, and the pin PE13, pin PE14, and pin PE15 are connected to the control interface.

[0059] In some embodiments, the microcontroller uses the STM32L471VET6 chip currently available on the market.

[0060] Continue to see Figure 2 , and see Figure 3 , the normally closed interface includes a normally closed interface NC0 connected to the pin PE7, a normally closed interface NC1 connected to the pin PE6, and a normally closed interface NC2 connected to the pin PE5, the normally closed interface NC0 is used to connect the first motor slip ring stator wire, the normally closed interface NC1 is used to connect the second motor slip ring stator wire, and the normally closed interface NC2 is used to connect the third motor slip ring stator wire;

[0061] The common interface includes a common interface COM0 connected to the pin PE11, a common interface COM1 connected to the pin PE10, and a common interface COM2 connected to the pin PE9, wherein the common interface COM0 is used to connect the first motor slip ring rotor wire, the common interface COM1 is used to connect the second motor slip ring rotor wire, and the common interface COM2 is used to connect the third motor slip ring rotor wire;

[0062] The control interface includes a control interface IN0, a control interface IN1, and a control interface IN2, wherein the control interface IN0 is connected to the pin PE15, the control interface IN1 is connected to the pin PE14, and the control interface IN2 is connected to the pin PE13;

[0063] When the control interface of the 4-way optocoupler isolation relay module 1 is at a low level, the normally closed interface NC0 is short-circuited with the common interface COM0, the normally closed interface NC1 is short-circuited with the common interface COM1, and the normally closed interface NC2 is short-circuited with the common interface COM2.

[0064] Specifically, see Figure 1The LED display module includes three parallel LED display circuits, the first LED display circuit 31 is connected to the pin PB11, so as to display the brightness of the light emitting diode LED1 in the first LED display circuit 31 according to the level state of the pin PB11 enabled by the microcontroller 2; the second LED display circuit 32 is connected to the pin PB12, so as to display the brightness of the light emitting diode LED2 in the second LED display circuit 32 according to the level state of the pin PB12 enabled by the microcontroller 2; the third LED display circuit 33 is connected to the pin PB13, so as to display the brightness of the light emitting diode LED3 in the third LED display circuit 33 according to the level state of the pin PB13 enabled by the microcontroller 2.

[0065] Specifically, in some embodiments, see Figure 4 , the first LED display circuit includes a resistor R8 and a light emitting diode LED1, one end of the resistor R8 is connected to the pin PB11, the other end is connected to one end of the light emitting diode LED1, and the other end of the light emitting diode LED1 is grounded;

[0066] Specifically, in some embodiments, continue to see Figure 4 The second LED display circuit includes a resistor R9 and a light emitting diode LED2, one end of the resistor R9 is connected to the pin PB12, the other end is connected to one end of the light emitting diode LED2, and the other end of the light emitting diode LED2 is grounded;

[0067] Specifically, in some embodiments, continue to see Figure 4 The third LED display circuit includes a resistor R11 and a light emitting diode LED3, one end of the resistor R11 is connected to the pin PB13, the other end is connected to one end of the light emitting diode LED3, and the other end of the light emitting diode LED3 is grounded.

[0068] Continue to see Figure 1 , the power supply module 4 includes:

[0069] The power module 41 is connected to the external power source 5, converts the voltage of the external power source 5 into a 5V voltage and outputs it;

[0070] An optocoupler power supply module 42, whose voltage input end is connected to the voltage output end of the power supply module 41, and whose voltage output end is connected to the power input end of the 4-way optocoupler isolation relay module 1, to provide working voltage for the 4-way optocoupler isolation relay module 1;

[0071] The microcontroller power supply module 43 has a voltage input terminal connected to the voltage output terminal of the power supply module 41 , and a voltage output terminal connected to the power pin of the microcontroller 2 , so as to provide a working voltage for the microcontroller 2 .

[0072] In some embodiments, see Figure 1 , and see Figure 5 , the power module includes a connector XP9, a MOS tube Q3, a shunt amplifier U3 and a voltage regulator U1 that outputs a 5V voltage, and the connector XP9 is used to connect an external power source 5;

[0073] The connector XP9 has four output pins, pin 3 is connected to pin 1, and pins 2 and 4 are grounded;

[0074] The drain of the MOS transistor Q3 is connected to the pin 1 of the connector XP9 and is grounded through the capacitor C79; the gate of the MOS transistor Q3 is grounded through the resistor R71, and the source of the MOS transistor Q3 is grounded through the capacitor C10 and the polarized capacitor C17 connected in parallel;

[0075] The pin IN+ of the shunt amplifier U3 is connected to the source of the MOS tube Q3, and is grounded through the resistor R4, the resistor R19 and the light-emitting diode V3 connected in series in sequence; the pin GND of the shunt amplifier U3 is grounded;

[0076] Pin IN of the voltage regulator U1 is connected to pin IN- of the shunt amplifier U3, and is grounded through capacitors C12 and C13 connected in parallel; pin PG of the voltage regulator U1 is connected to an optocoupler power supply module and a microcontroller power supply module, and is grounded through capacitors C15 and C16 connected in parallel, and pin OUT of the voltage regulator U1 is connected to pin PG of the voltage regulator U1.

[0077] Specifically, in some embodiments, the external power supply adopts a voltage regulator or a lithium battery, the connector XP9 adopts the existing MOLEX4 on the market, the MOS tube Q3 adopts the existing SSM3J328R chip on the market, the regulator U1 adopts the existing TPS76850Q chip on the market, and the regulator U3 adopts the existing AD8217 chip on the market.

[0078] In some embodiments, see Figure 1 , and see Figure 6 , the optocoupler power supply module includes:

[0079] A control interface connected to the pin PA3 of the microcontroller so that the microcontroller controls the optocoupler power supply module to provide a working voltage for the 4-way optocoupler isolation relay module;

[0080] MOS tube Q2, the source of the MOS tube Q2 is connected to the pin PG of the voltage regulator U1, and is connected to the gate of the MOS tube Q2 through a resistor R4; the drain of the MOS tube Q2 is connected to the power input end of the 4-way optical coupling isolation relay module;

[0081] Transistor V3, the base of the transistor V3 is connected to the control interface through a resistor R6, the collector of the transistor V3 is connected to the gate of the MOS tube Q2, the emitter of the transistor V3 is grounded, and is connected to the base of the transistor V3 through a resistor R7.

[0082] When the microcontroller enable pin PA3 is at a high level, the control interface of the optocoupler power supply module (i.e. optocoupler_PWR) is at a high level. At this time, the MOS tube Q2 is turned on, and the optocoupler power supply_5V of the 4-way optocoupler isolation relay module is in a 5V voltage state. The optocoupler power supply module completes the power supply to the 4-way optocoupler isolation relay module.

[0083] Specifically, in some embodiments, the MOS tube Q2 adopts the existing SSM3J28R chip on the market, and the transistor V3 adopts the existing S9013 chip on the market.

[0084] In some embodiments, the microcontroller power supply module includes a voltage regulator U2 that outputs a 3.3V voltage, the pin VIN of the voltage regulator U2 is connected to the pin PG of the voltage regulator U1, and is grounded through capacitors C31 and C66 connected in parallel; the pin VOUT of the voltage regulator U2 is connected to the power input terminal of the microcontroller, and is grounded through capacitors C40 and C41 connected in parallel, and is grounded through resistors R20 and light-emitting diodes V5 connected in series; the pin EN of the voltage regulator U2 is connected to the pin VIN of the voltage regulator U2. The voltage regulator U2 converts the 5V voltage output by the voltage regulator U1 in the power supply module into a 3.3V voltage to supply the microcontroller, thereby realizing power supply to the microcontroller.

[0085] Specifically, the voltage regulator U2 adopts the RT9013-3.3 chip currently available on the market.

[0086] In the above-mentioned schematic embodiment, the motor slip ring stator wire and rotor wire continuity test device adopts a modular design, is small in size, easy to move, can be plugged in and used at any time, and can perform real-time batch detection of the continuity of the motor slip ring stator wire and the rotor wire. It has high detection efficiency, good real-time performance, and high practical application value.

[0087] The following is combined with Figures 1 to 8 The working process of an embodiment of the on-off test device for the stator conductor and the rotor conductor of the motor slip ring of the present invention is described as follows:

[0088] 1) Connect NC0, NC1, and NC2 on the 4-way optocoupler isolation relay module to the three wires of the slip ring stator, and connect COM0, COM1, and COM2 on the 4-way optocoupler isolation relay module to the three wires of the slip ring rotor. Power supply: Power the system through a voltage stabilizer or a lithium battery.

[0089] 2) After the microcontroller is powered on, a program self-check function will appear. This function mainly enables pins PB11, PB12, and PB13 to be high level, which will show that the three LEDs are always on.

[0090] 3) After the program self-check is normal, the pins corresponding to the 3-way LED are all enabled to a low level, and the 3-way LED is now in an off state; the microcontroller determines whether it is necessary to measure the connectivity between the rotor wire and the stator wire when the motor is rotating.

[0091] 4) If it is a dynamic measurement, the motor rotates (i.e. the motor works); the control interface (i.e. optocoupler_PWR) enables high level, and the 4-way optocoupler isolation relay module is powered on with 5V; the STM31L471VET6 microcontroller enables the three pins PE15 (IN0), PE14 (IN11), and PE13 (IN2) to enable low level; the microcontroller enables PE7 (NC0) to be low level, PE6 (NC1) to be high level, and PE5 (NC2) to be low level. Since NC0, NC1, and NC2 on the 4-way optocoupler isolation relay module are respectively connected to the three wires of the slip ring stator, and COM0, COM1, and COM2 on the 4-way optocoupler isolation relay module are respectively connected to the three wires of the slip ring rotor. At this time, the microcontroller reads the level sequence corresponding to the pins PE11, PE10, and PE9, respectively, whether it is low, high, and low.

[0092] 5) If the microcontroller reads the corresponding levels of pins PE11, PE10, and PE9 as low, high, and low respectively, and the microcontroller enables the three pins PB11\PB12\PB13 as high levels, the three LEDs will be always on.

[0093] 6) On the contrary, if the microcontroller reads the corresponding values ​​of pins PE11, PE10, and PE9 respectively and they are not low, high, and low, if they are detected as high, high, and low, then the microcontroller enables the three pins PB11\PB12\PB13 as low, high, and high, and the three LEDs will appear as dark, bright, and bright, and so on.

[0094] 7) If it is a static measurement of the motor, the motor is stationary (i.e. the motor stops working); the control interface (i.e. optocoupler_PWR) enables high level, and the 4-way optocoupler isolation relay module is powered on with 5V; the STM31L471VET6 microcontroller enables the three pins PE15 (IN0), PE14 (IN11), and PE13 (IN2) to enable low level; the microcontroller enables PE7 (NC0) to be low level, PE6 (NC1) to be high level, and PE5 (NC2) to be low level. Since NC0, NC1, and NC2 on the 4-way optocoupler isolation relay module are respectively connected to the three wires of the slip ring stator, and COM0, COM1, and COM2 on the 4-way optocoupler isolation relay module are respectively connected to the three wires of the slip ring rotor. At this time, the microcontroller reads the level sequence corresponding to the pins PE11, PE10, and PE9, respectively, whether it is low, high, and low.

[0095] 8) Repeat steps 5 and 6.

[0096] 9) If the test is completed according to the time requirement, the control interface (i.e. optocoupler_PWR) enables the low level, the 4-way optocoupler isolation relay module is powered off, and the test is completed.

[0097] The second aspect of the present invention provides a method for testing the continuity of a motor slip ring stator conductor and a rotor conductor, using the motor slip ring stator conductor and rotor conductor continuity testing device described in the first aspect of the present invention, see Figures 1 to 8 , including the following steps:

[0098] Dynamic measurement steps: When the motor rotates, the microcontroller enables the control interface IN0, the control interface IN1, and the control interface IN2 of the 4-way optocoupler isolation relay module as low levels, and enables the normally closed interface NC0, the normally closed interface NC1, and the normally closed interface NC2 of the 4-way optocoupler isolation relay module as low levels; at this time, the microcontroller determines whether the level sequence corresponding to the pins PE11, PE10, and PE9 of the microcontroller is low, high, and low; if the microcontroller determines that the level sequence corresponding to the pins PE11, PE10, and PE9 is low, high, and low, the microcontroller enables the pins PB11, PB12, and PB13 of the microcontroller as high levels, then the light-emitting diodes of the 3-way LED display circuit are in a normally bright state; if the microcontroller determines that the level sequence corresponding to the pins PE11, PE10, and PE9 is not low, high, and low, the microcontroller enables the pins with inconsistent levels among the pins PE11, PE10, and PE9 as low levels, then the light-emitting diodes of the LED display circuit corresponding to the pins are in a dark state.

[0099] Static measurement steps: when the motor stops working, the controller enables the control interface IN0, the control interface IN1, and the control interface IN2 as low levels, and enables the normally closed interface NC0 as low level, the normally closed interface NC1 as high level, and the normally closed interface NC2 as low level; at this time, the microcontroller determines whether the level sequence corresponding to the pin PE11, the pin PE10, and the pin PE9 is low, high, and low; if the microcontroller determines that the level sequence corresponding to the pin PE11, the pin PE10, and the pin PE9 is low, high, and low, and the microcontroller enables the pin PB11, the pin PB12, and the pin PB13 as high levels, then the light-emitting diodes of the 3-way LED display circuit are in a normally bright state; if the microcontroller determines that the level sequence corresponding to the pin PE11, the pin PE10, and the pin PE9 is not low, high, and low, and the microcontroller enables the pins with inconsistent levels among the pins PE11, the pin PE10, and the pin PE9 as low levels, then the light-emitting diodes of the LED display circuit corresponding to the pins are in a dark state.

[0100] It should be noted that before measurement, the following work needs to be done:

[0101] (1) Connect NC0, NC1, and NC2 on the 4-way optocoupler isolation relay module to the three wires on the slip ring stator, and connect COM0, COM1, and COM2 on the 4-way optocoupler isolation relay module to the three wires on the slip ring rotor.

[0102] (2) Power supply: the system is powered by a voltage regulator or a lithium battery. When the microcontroller enable pin PA3 is high, the optocoupler_PWR is high, the MOS tube SSM3J328R is turned on, and the optocoupler power supply_V5 is in a 5V voltage state.

[0103] (3) After the microcontroller is powered on, the program self-check function will appear. This function mainly enables pins PB11, PB12, and PB13 to be high level, which will show that the three LEDs are in a long-on state.

[0104] (4) After the program self-check is normal, the pins corresponding to the three LEDs are all enabled to a low level, and the three LEDs are in the off state. At this time, the microcontroller determines whether it is necessary to measure the connectivity between the rotor wire and the stator wire when the motor is rotating.

[0105] In the above-mentioned schematic embodiment, the continuity test method of the motor slip ring stator wire and the rotor wire covers the motor dynamic test and the motor static test. The judgment basis is reasonable, and the test results are displayed by the brightness of the LED. Compared with the existing multimeter test method, it is smarter, more intuitive, simple and convenient, and can test the continuity of multiple wires at one time, thereby improving work efficiency and having good real-time detection.

[0106] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0107] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A motor slip ring stator conductor and rotor conductor continuity test device, characterized in that: include: A 4-way optocoupler isolation relay module, whose normally closed interface is connected to the motor slip ring stator wire, and whose public interface is connected to the motor slip ring rotor wire, when the control interface of the 4-way optocoupler isolation relay module is at a low level, the normally closed interface is short-circuited with the public interface; A microcontroller, wherein the microcontroller is connected to the control interface of the 4-way optical coupling isolation relay module to enable the control interface to be at a low level; the controller is respectively connected to the normally closed interface and the common interface to set the level state of the normally closed interface and obtain the level state of the common interface; The microcontroller comprises a judgment module, and the judgment module is used to judge whether the stator wire of the motor slip ring is connected with the rotor wire according to whether the level state of the common interface is consistent with the level state of the normally closed interface; An LED display module is electrically connected to the microcontroller, and the microcontroller controls the brightness of an LED in the LED display module according to a judgment result of the judgment module and the acquired normally closed interface level state to display the on / off state of the stator wire and the rotor wire of the motor slip ring; A power supply module provides operating voltage for the 4-way optical coupling isolation relay module and the microcontroller.

2. The motor slip ring stator conductor and rotor conductor continuity test device according to claim 1, characterized in that: The microcontroller has pin PA3, pin PB11, pin PB12, pin PB13, pin PB14, pin PE5, pin PE6, pin PE7, pin PE9, pin PE10, pin PE11, pin PE13, pin PE14, and pin PE15; the pin PA3 is connected to the optocoupler power supply module in the power supply module; the pin PB11, pin PB12, pin PB13, and pin PB14 are connected to the LED display module to control the brightness of the LED in the LED display module; the pin PE5, pin PE6, and pin PE7 are connected to the normally closed interface, the pin PE9, pin PE10, and pin PE11 are connected to the common interface, and the pin PE13, pin PE14, and pin PE15 are connected to the control interface.

3. The motor slip ring stator conductor and rotor conductor continuity test device according to claim 2, characterized in that: The normally closed interface includes a normally closed interface NC0 connected to the pin PE7, a normally closed interface NC1 connected to the pin PE6, and a normally closed interface NC2 connected to the pin PE5, wherein the normally closed interface NC0 is used to connect the first motor slip ring stator wire, the normally closed interface NC1 is used to connect the second motor slip ring stator wire, and the normally closed interface NC2 is used to connect the third motor slip ring stator wire; The common interface includes a common interface COM0 connected to the pin PE11, a common interface COM1 connected to the pin PE10, and a common interface COM2 connected to the pin PE9, wherein the common interface COM0 is used to connect the first motor slip ring rotor wire, the common interface COM1 is used to connect the second motor slip ring rotor wire, and the common interface COM2 is used to connect the third motor slip ring rotor wire; The control interface includes a control interface IN0, a control interface IN1, and a control interface IN2, wherein the control interface IN0 is connected to the pin PE15, the control interface IN1 is connected to the pin PE14, and the control interface IN2 is connected to the pin PE13; When the control interface of the 4-way optocoupler isolation relay module is at a low level, the normally closed interface NC0 is short-circuited with the common interface COM0, the normally closed interface NC1 is short-circuited with the common interface COM1, and the normally closed interface NC2 is short-circuited with the common interface COM2.

4. The motor slip ring stator conductor and rotor conductor continuity test device according to claim 3, characterized in that: The LED display module includes three parallel LED display circuits, the first LED display circuit is connected to the pin PB11 to display the brightness of the light-emitting diode LED1 in the first LED display circuit according to the level state of the pin PB11 enabled by the microcontroller; the second LED display circuit is connected to the pin PB12 to display the brightness of the light-emitting diode LED2 in the second LED display circuit according to the level state of the pin PB12 enabled by the microcontroller; the third LED display circuit is connected to the pin PB13 to display the brightness of the light-emitting diode LED3 in the third LED display circuit according to the level state of the pin PB13 enabled by the microcontroller.

5. The motor slip ring stator conductor and rotor conductor continuity test device according to claim 4, characterized in that: The first LED display circuit comprises a resistor R8 and a light emitting diode LED1, one end of the resistor R8 is connected to the pin PB11, the other end is connected to one end of the light emitting diode LED1, and the other end of the light emitting diode LED1 is grounded; The second LED display circuit comprises a resistor R9 and a light emitting diode LED2, one end of the resistor R9 is connected to the pin PB12, the other end is connected to one end of the light emitting diode LED2, and the other end of the light emitting diode LED2 is grounded; The third LED display circuit comprises a resistor R11 and a light emitting diode LED3. One end of the resistor R11 is connected to the pin PB13, and the other end is connected to one end of the light emitting diode LED3. The other end of the light emitting diode LED3 is grounded.

6. The motor slip ring stator conductor and rotor conductor continuity test device according to claim 5, characterized in that: The power supply module comprises: The power module is connected to an external power supply, converts the external power supply voltage into a 5V voltage and outputs it; An optocoupler power supply module, whose voltage input end is connected to the voltage output end of the power supply module, and whose voltage output end is connected to the power input end of the 4-way optocoupler isolation relay module, to provide working voltage for the 4-way optocoupler isolation relay module; A microcontroller power supply module has a voltage input terminal connected to a voltage output terminal of the power supply module, and a voltage output terminal connected to a power pin of the microcontroller to provide a working voltage for the microcontroller.

7. The motor slip ring stator conductor and rotor conductor continuity test device according to claim 6, characterized in that: The power module includes a connector XP9, a MOS tube Q3, a shunt amplifier U3 and a voltage regulator U1 that outputs a 5V voltage, and the connector XP9 is used to connect an external power supply; The connector XP9 has four output pins, pin 3 is connected to pin 1, and pins 2 and 4 are grounded; The drain of the MOS transistor Q3 is connected to the pin 1 of the connector XP9 and is grounded through the capacitor C79; the gate of the MOS transistor Q3 is grounded through the resistor R71, and the source of the MOS transistor Q3 is grounded through the capacitor C10 and the polarized capacitor C17 connected in parallel; The pin IN+ of the shunt amplifier U3 is connected to the source of the MOS tube Q3, and is grounded through the resistor R4, the resistor R19 and the light-emitting diode V3 connected in series in sequence; the pin GND of the shunt amplifier U3 is grounded; Pin IN of the voltage regulator U1 is connected to pin IN- of the shunt amplifier U3, and is grounded through capacitors C12 and C13 connected in parallel; pin PG of the voltage regulator U1 is connected to an optocoupler power supply module and a microcontroller power supply module, and is grounded through capacitors C15 and C16 connected in parallel, and pin OUT of the voltage regulator U1 is connected to pin PG of the voltage regulator U1.

8. The motor slip ring stator conductor and rotor conductor continuity test device according to claim 7, characterized in that: The optocoupler power supply module comprises: A control interface connected to the pin PA3 of the microcontroller so that the microcontroller controls the optocoupler power supply module to provide a working voltage for the 4-way optocoupler isolation relay module; MOS tube Q2, the source of the MOS tube Q2 is connected to the pin PG of the voltage regulator U1, and is connected to the gate of the MOS tube Q2 through a resistor R4; the drain of the MOS tube Q2 is connected to the power input end of the 4-way optical coupling isolation relay module; Transistor V3, the base of the transistor V3 is connected to the control interface through a resistor R6, the collector of the transistor V3 is connected to the gate of the MOS tube Q2, the emitter of the transistor V3 is grounded, and is connected to the base of the transistor V3 through a resistor R7.

9. The motor slip ring stator conductor and rotor conductor continuity test device according to claim 7, characterized in that: The microcontroller power supply module includes a voltage regulator U2 that outputs a 3.3V voltage, wherein the pin VIN of the voltage regulator U2 is connected to the pin PG of the voltage regulator U1, and is grounded through capacitors C31 and C66 connected in parallel; the pin VOUT of the voltage regulator U2 is connected to the power input terminal of the microcontroller, and is grounded through capacitors C40 and C41 connected in parallel, and is grounded through a resistor R20 and a light-emitting diode V5 connected in series; the pin EN of the voltage regulator U2 is connected to the pin VIN of the voltage regulator U2.

10. A method for testing the continuity of a motor slip ring stator conductor and a rotor conductor, characterized in that: The motor slip ring stator conductor and rotor conductor continuity test device according to any one of claims 4 to 9 is used, and the method comprises: Dynamic measurement steps: when the motor rotates, the microcontroller enables the control interface IN0, the control interface IN1, and the control interface IN2 of the 4-way optocoupler isolation relay module to be low level, and enables the normally closed interface NC0, the normally closed interface NC1, and the normally closed interface NC2 of the 4-way optocoupler isolation relay module to be low level; at this time, the microcontroller determines whether the level sequence corresponding to the pin PE11, the pin PE10, and the pin PE9 of the microcontroller is low, high, and low; if the microcontroller determines that the level sequence corresponding to the pin PE11, the pin PE10, and the pin PE9 is low, high, and low, the microcontroller enables the pin PB11, the pin PB12, and the pin PB13 of the microcontroller to be high level, then the light-emitting diodes of the 3-way LED display circuit are in a constantly bright state; if the microcontroller determines that the level sequence corresponding to the pin PE11, the pin PE10, and the pin PE9 is not low, high, and low, the microcontroller enables the pins with inconsistent levels among the pins PE11, the pin PE10, and the pin PE9 to be low level, then the light-emitting diodes of the LED display circuit corresponding to the pins are in a dark state; Static measurement steps: when the motor stops working, the controller enables the control interface IN0, the control interface IN1, and the control interface IN2 as low levels, and enables the normally closed interface NC0 as low level, the normally closed interface NC1 as high level, and the normally closed interface NC2 as low level; at this time, the microcontroller determines whether the level sequence corresponding to the pin PE11, the pin PE10, and the pin PE9 is low, high, and low; if the microcontroller determines that the level sequence corresponding to the pin PE11, the pin PE10, and the pin PE9 is low, high, and low, and the microcontroller enables the pin PB11, the pin PB12, and the pin PB13 as high levels, then the light-emitting diodes of the 3-way LED display circuit appear to be normally bright; if the microcontroller determines that the level sequence corresponding to the pin PE11, the pin PE10, and the pin PE9 is not low, high, and low, and the microcontroller enables the pins with inconsistent levels among the pins PE11, the pin PE10, and the pin PE9 as low levels, then the light-emitting diodes of the LED display circuit corresponding to the pin appear to be dark.

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