Servo power amplifier board detection device and method

Abstract

The invention provides a servo power amplifier board detection device and method, and belongs to the technical field of motor drive control. The detection device comprises a power supply module, an enabling control module and a detection module; the enabling control module comprises a power supply enabling switch and a motor enabling switch; the detection module comprises a motor, a bidirectional ammeter, a power resistor, a change-over switch and a rotating speed voltage regulating switch, the motor or the power resistor is switched to be connected to the output end of the servo power amplifier board through the change-over switch, and the input end of the servo power amplifier board is connected with the rotating speed voltage regulating switch; a D / A signal externally input by a rotating speed voltage regulation switch simulation system in the detection module is utilized to complete PWM wave duty ratio modulation of power drive of the servo power amplifier board, and the detection module detects speed change and direction change of the servo power amplifier board and simulates the real state of the motor under the control of the servo power amplifier board. Therefore, whether the function and the performance of the servo power amplifier board meet actual use requirements or not can be detected.

Description

Technical Field

[0001] This invention belongs to the field of motor drive control technology, specifically relating to a servo power amplifier board detection device and a servo power amplifier board detection method. Background Technology

[0002] A servo amplifier board is a high-performance motor drive system integrating analog circuits and signal processing technology. It is a core component of a servo system, primarily converting control signals into the high-power current and voltage required to drive the motor. By modulating the PWM duty cycle, it achieves speed control and commutation of the controlled motor. The performance of the servo amplifier board directly determines the response speed, accuracy, and reliability of the entire servo system. It is typically integrated inside the photoelectric turret, enabling drive control of the four motors within the turret, ensuring high-precision, high-dynamic-response target tracking and stable imaging. During mass production, servo amplifier boards are prone to various faults caused by improper soldering, assembly, or substandard component performance. These faults manifest as: motor brake failure, high-frequency motor squealing, overspeed or slow response, excessive zero-position offset, and high-frequency system jitter.

[0003] Currently, due to the lack of dedicated testing equipment, servo amplifier boards cannot undergo independent functional and performance testing after production. Whether the core functions of the servo amplifier board are operating normally, and whether key performance indicators meet design specifications, cannot be known before use. This directly results in the servo amplifier board's quality status being "unknown" before installation. Potential problems can only be indirectly exposed by installing it into the final product and relying on the operation of the entire system. This delayed fault detection mechanism not only leads to problematic servo amplifier boards flowing into subsequent production stages and final products, but more seriously, when the entire system malfunctions, it is difficult to quickly and accurately distinguish whether the root cause of the fault is the servo amplifier board itself, other related components, or a system integration and matching problem, significantly increasing the complexity, time, and cost of fault diagnosis. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that existing servo amplifier boards lack dedicated testing devices to measure their performance and functions, and to provide a servo amplifier board testing device and a servo amplifier board testing method.

[0005] To achieve the above objectives, the technical solution provided by this invention is:

[0006] A servo amplifier board detection device is provided, including a power supply module, an enable control module, and a detection module. The power supply module includes a primary transformer circuit and a secondary transformer circuit. The primary transformer circuit converts the input 220V AC power to 24V DC power. The secondary transformer circuit converts the 24V DC power to ±15V DC power. The 24V DC power is used to power the power supply module of the servo amplifier board, and the ±15V DC power is used to power the operational amplifier of the servo amplifier board. A power ground for the 24V DC power and a signal ground for the ±15V DC power are provided, and the power ground and signal ground are electrically isolated. The enable control module includes a power enable switch and a motor enable switch. Both the power enable switch and the motor enable switch are from the same source as the power ground. The power enable switch is used to control the power supply of the servo amplifier board. The on / off switch enables the power amplifier module on the servo amplifier board to generate a PWM wave. The motor enable switch is used to enable the power amplifier module on the servo amplifier board to generate a PWM wave. The detection module includes a motor, a bidirectional ammeter, a power resistor, a switch, and a speed and voltage adjustment switch. The bidirectional ammeter is connected in series with the power resistor and then in parallel with the motor. The power resistor, bidirectional ammeter, and motor are used to simulate a load. The switch switches the connection between the power resistor or the motor and the output terminal of the servo amplifier board. The input terminal of the servo amplifier board is connected to a speed and voltage adjustment switch, which is used to simulate the D / A signal from an external host computer. The motor and bidirectional ammeter provide real-time feedback on the motor rotation under the PWM wave output and the controlled current during the motor rotation process, thereby detecting the output performance of the servo amplifier board.

[0007] Furthermore, the secondary transformer circuit is a three-winding transformer with the same magnetic core, including an input winding, a positive output winding, and a negative output winding. The input winding is connected to 24V DC and is set with a power ground. The positive output winding outputs +15V DC, and the negative output winding outputs -15V DC. The positive and negative output windings share a signal ground.

[0008] Furthermore, filter capacitors C20 and C21 are connected in parallel between the 24V DC input terminal and power ground; filter capacitor C31 is connected in parallel between the +15V DC output terminal and signal ground; a positive full-wave rectifier bridge is connected to both ends of the positive output winding, and an NPN diode Q3 is connected between the +15V DC output terminal and the positive full-wave rectifier bridge; filter capacitor C41 is connected in parallel between the -15V DC output terminal and signal ground; a negative full-wave rectifier bridge is connected to both ends of the negative output winding, and an NPN diode Q4 is connected between the -15V DC output terminal and the negative full-wave rectifier bridge.

[0009] Furthermore, the first-stage transformer circuit includes a rectifier and filter unit for converting 220V AC level to 24V DC level.

[0010] Furthermore, the servo amplifier board testing device also includes an internally hollow shell, in which the power supply module and enable control module are installed. An operation panel is provided on one side of the outer wall of the shell. The operation panel is equipped with a power enable switch toggle button, a motor enable switch toggle button, and a speed adjustment knob. The power enable switch toggle button is connected to the power enable switch, the motor enable switch toggle button is connected to the motor enable switch, and the speed adjustment knob is connected to the speed voltage adjustment switch. A switch, a bidirectional ammeter, and the motor output head are installed on the operation panel.

[0011] Furthermore, the detection module also includes an auxiliary detection port, which is connected to the output of the servo amplifier board. This auxiliary detection port is used to connect an oscilloscope when the servo amplifier board malfunctions, and to measure the output signal of the servo amplifier board.

[0012] Furthermore, a fan for heat dissipation and a socket for connecting to a power source are provided on the side wall of the housing opposite the control panel.

[0013] A method for testing a servo amplifier board is also provided, which uses the aforementioned servo amplifier board testing device to test the servo amplifier board. The method includes the following steps:

[0014] Step 1: Provide a stable 220V power supply to the testing device and turn off the power enable switch and motor enable switch. Then connect the servo amplifier board under test to the testing device through the debugging cable.

[0015] Step 2: Connect the 220V power supply, and then turn on the power enable switch and the motor enable switch in sequence;

[0016] Step 3: Rotate the switch to connect the motor to the output of the servo amplifier board. Slowly turn the speed voltage adjustment switch to the right to control the motor to rotate in the forward direction and observe whether the motor speed responds to the change in speed voltage. Slowly turn the speed voltage adjustment switch to the left to control the motor to rotate in the reverse direction and observe whether the motor speed responds to the change in speed voltage. If not, the servo amplifier board is not functioning properly. If yes, proceed to step 4 to perform performance testing.

[0017] Step 4: Rotate the switch to connect the power resistor and bidirectional ammeter to the output of the servo amplifier board. Slowly rotate the speed voltage adjustment switch to the right and observe whether the pointer of the bidirectional ammeter increases positively as the speed voltage adjustment switch is rotated to the right. Slowly rotate the speed voltage adjustment switch to the left and observe whether the pointer of the bidirectional ammeter decreases negatively as the speed voltage adjustment switch is rotated to the left. During the rotation of the speed voltage adjustment switch to the right and left, observe whether the pointer of the bidirectional ammeter changes periodically and symmetrically with the change of speed voltage. If so, the performance of the servo amplifier board is qualified; if not, the performance of the servo amplifier board is unqualified.

[0018] The advantages of this invention are:

[0019] 1. The detection device designed in this invention uses a power supply module to simulate the system supplying power to the servo amplifier board; the speed and voltage adjustment switch in the detection module simulates the external D / A signal input to the system, and completes the PWM wave duty cycle modulation to drive the servo amplifier board. The detection module detects the speed and direction changes of the servo amplifier board and the real state of the simulated motor under the control of the servo amplifier board, thereby detecting whether the function and performance of the servo amplifier board meet the actual use requirements.

[0020] 2. The detection device designed in this invention is suitable for detecting servo power amplifier boards with PWM (Pulse Width Modulation) full-bridge power drive and current negative feedback closed-loop control. The detection module can detect the speed regulation and commutation functions of the circuit board when driving a motor. By connecting the motor to the output terminal of the servo power amplifier board and rotating the speed voltage adjustment switch, the motor's timely response under speed voltage control can be observed. By connecting a power resistor to the output terminal of the servo power amplifier board and modulating the PWM wave duty cycle by the speed voltage adjustment switch, the pointer reading of the bidirectional ammeter can be observed to detect the performance of the servo power amplifier board: the symmetry of the motor output torque when the PWM wave duty cycle polarity is reversed. Therefore, this detection device has high detection efficiency and is easy to operate for servo power amplifier boards.

[0021] 3. The detection device designed in this invention converts 220V AC to 24V DC through a primary transformer circuit, and then converts the 24V DC to ±15V DC through a secondary transformer circuit. Electrically isolated power ground and signal ground are designed to block interference from high current in the power circuit on the control signal. This effectively isolates harmonics and ripples caused by the 220V AC, achieving the purpose of isolation. This allows for the output of a stable ±15V DC, providing a clean enable signal for the servo amplifier board. Simultaneously, the power enable switch and motor enable switch are physically isolated, preventing false triggering due to strong crosstalk and improving detection safety. Attached Figure Description

[0022] The features and advantages of the invention will become more readily apparent from the following description with reference to the accompanying drawings, which are not drawn to scale and some features are enlarged or reduced to show details of specific parts.

[0023] Figure 1 This is a secondary transformer circuit diagram of the power supply module of the present invention;

[0024] Figure 2 This is a schematic diagram of the power enable switch and motor enable switch in the enable control module of this invention;

[0025] Figure 3 This is a diagram showing the connection relationship between the motor, the bidirectional ammeter, and the power resistor in the detection module of this invention.

[0026] Figure 4 This is a schematic diagram of the operation panel structure on the outer shell of the detection device of the present invention;

[0027] Figure 5 This is a schematic diagram of the rear end of the outer shell of the detection device of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the speed adjustment knob and the motor output head on the operation panel of the present invention;

[0029] Figure 7 This is a schematic diagram of the speed adjustment knob and bidirectional ammeter on the operation panel in this invention;

[0030] Figure 8 This is a schematic diagram of the detection device used in this invention.

[0031] Figure 9 This is a schematic diagram illustrating the operation of the present invention using a detection device to detect a servo amplifier board. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments thereof. It should be noted that the following detailed description of the present invention is for illustrative purposes only and is not intended to limit the scope of the invention.

[0033] To address the lack of a dedicated testing device for measuring the performance and functionality of existing servo amplifier boards, this invention provides a servo amplifier board testing device. The servo amplifier board employs PWM (Pulse Width Modulation) to modulate the PWM control signal into a pulse sequence with a fixed frequency and different duty cycles, thereby changing the average output voltage. Ultimately, the motor speed is controlled by adjusting the voltage.

[0034] The detection device includes a power supply module, an enable control module, and a detection module.

[0035] The power supply module includes a primary transformer circuit and a secondary transformer circuit. The primary transformer circuit converts the input 220V AC power to 24V DC power. The secondary transformer circuit is used to convert the 24V DC power to ±15V DC power. The 24V DC power is used to power the power supply module of the servo amplifier board, and the ±15V DC power is used to power the operational amplifier of the servo amplifier board. It also has a 24V DC power ground and a ±15V DC signal ground, and the power ground and signal ground are electrically isolated. The 220V AC power is converted to 24V DC power through a primary transformer circuit, and then the 24V DC power is converted to ±15V DC power through a secondary transformer circuit. Electrically isolated power ground and signal ground are designed to block the interference of large current in the power circuit on the control signal. This effectively isolates the harmonics and ripples brought by the 220V AC power, achieving the purpose of isolation. It can output a stable ±15V DC power, providing a clean enable signal for the servo power amplifier board. The power enable switch and the motor enable switch are physically isolated to avoid false triggering caused by strong crosstalk, thus improving detection safety.

[0036] like Figure 1 As shown, the secondary transformer circuit is a three-winding transformer with the same magnetic core, including an input winding, a positive output winding, and a negative output winding. The input winding is connected to 24V DC and has a power ground. The positive output winding outputs +15V DC, and the negative output winding outputs -15V DC. The positive and negative output windings share a signal ground. The primary transformer circuit includes a rectifier and filter unit to convert 220V AC to 24V DC.

[0037] A filter capacitor C20 and a filter capacitor C21 are connected in parallel between the 24V DC input terminal and the power ground; a filter capacitor C31 is connected in parallel between the +15V DC output terminal and the signal ground; a positive voltage output winding is connected to a positive voltage full-wave rectifier bridge, and an NPN diode Q3 is connected between the +15V DC output terminal and the positive voltage full-wave rectifier bridge; a filter capacitor C41 is connected in parallel between the -15V DC output terminal and the signal ground; a negative voltage output winding is connected to a negative voltage full-wave rectifier bridge, and an NPN diode Q4 is connected between the -15V DC output terminal and the negative voltage full-wave rectifier bridge. The base of NPN diode Q3 and the collector of NPN diode Q4 share a common ground. The positive voltage full-wave rectifier bridge includes diodes D31 and D32, and the negative voltage full-wave rectifier bridge includes diodes D41 and D42. Figure 2 As shown, the enable control module includes a power enable switch and a motor enable switch. Both the power enable switch and the motor enable switch are from the same power ground. The power enable switch is used to control the power supply of the servo amplifier board, so that the power amplifier module on the servo amplifier board has a source to generate PWM waves. The motor enable switch is used to enable the power amplifier module on the servo amplifier board to generate PWM waves.

[0038] like Figure 3 As shown, the detection module includes a motor, a bidirectional ammeter, a power resistor, a switch, and a speed and voltage adjustment switch. The motor is... Figure 2 The M component in the diagram represents the bidirectional ammeter, which is component A in the diagram. The bidirectional ammeter is connected in series with the power resistor and then in parallel with the motor. The power resistor and motor are used to simulate the load. A switch is used to switch the connection between the power resistor or the motor and the output of the servo amplifier board. The input of the servo amplifier board is connected to a speed and voltage adjustment switch, which is used to simulate the D / A signal from an external host computer. The motor rotation and the controlled current during the motor rotation process are fed back in real time by the motor and the bidirectional ammeter under the PWM wave output, thereby detecting the output performance of the servo amplifier board.

[0039] The testing device uses a power supply module to simulate the system's power supply to the servo amplifier board; it uses a speed and voltage adjustment switch in the testing module to simulate the external D / A signal input to the system, completing the duty cycle modulation of the PWM wave driving the servo amplifier board; the testing module detects the speed and direction changes of the servo amplifier board and simulates the actual state of the motor under the control of the servo amplifier board, thereby reflecting whether the performance of the servo amplifier board meets the actual use requirements.

[0040] In certain embodiments of the present invention, for ease of transport and use of the detection device, such as... Figure 4 , 5 As shown in Figures 6 and 7, the servo amplifier board testing device also includes an internally hollow outer shell. The power supply module and the enable control module are installed in the outer shell. An operation panel is provided on one side of the outer wall of the outer shell. The operation panel is provided with a power enable switch toggle button, a motor enable switch toggle button, and a speed adjustment knob. The power enable switch toggle button is connected to the power enable switch, the motor enable switch toggle button is connected to the motor enable switch, and the speed adjustment knob is connected to the speed voltage adjustment switch. A switching switch, a bidirectional ammeter, and the motor output head are installed on the operation panel.

[0041] The testing module also includes an auxiliary testing port, which connects to the output of the servo amplifier board. This port allows for the connection of an oscilloscope to measure the output signal of the servo amplifier board when a fault occurs. An auxiliary testing port is also provided on the operation panel for connecting an oscilloscope to the auxiliary testing port, facilitating operator access during fault location.

[0042] like Figure 4 As shown, in order to facilitate the operator's observation of the testing status of the servo amplifier board during the testing process, the operation panel can also be equipped with a power enable indicator and a motor enable indicator to display the status of the power enable switch and the motor enable switch. A power switch can also be provided to control the connection and disconnection of the 220V power supply, and to realize the debugging operation of the connection between the testing device and the servo amplifier board.

[0043] like Figure 5 As shown, a fan for heat dissipation and cooling of the components inside the housing are provided on the side wall opposite to the operation panel to improve the reliability of the detection device. A socket for connecting a 220V power supply can also be provided on this side wall.

[0044] like Figure 6 As shown, the speed adjustment knob and the motor output head are located on the control panel.

[0045] like Figure 7 As shown, the speed adjustment knob and bidirectional ammeter are located on the operation panel.

[0046] This invention also provides a servo amplifier board testing method, used by the aforementioned servo amplifier board testing device to test the servo amplifier board, such as... Figure 8 , 9 As shown, the method includes the following steps:

[0047] Step 1: Provide a stable 220V power supply to the testing device and turn off the power enable switch and motor enable switch. Then connect the servo amplifier board under test to the testing device through the debugging cable.

[0048] Step 2: Connect the 220V power supply, and then turn on the power enable switch and the motor enable switch in sequence;

[0049] Step 3: Rotate the switch to connect the motor to the output of the servo amplifier board. Slowly turn the speed voltage adjustment switch to the right to control the motor to rotate in the forward direction and observe whether the motor speed responds to the change in speed voltage. Slowly turn the speed voltage adjustment switch to the left to control the motor to rotate in the reverse direction and observe whether the motor speed responds to the change in speed voltage. If not, the servo amplifier board is not functioning properly. If yes, proceed to step 4 to perform performance testing.

[0050] Step 4: Rotate the switch to connect the power resistor and bidirectional ammeter to the output of the servo amplifier board. Slowly rotate the speed voltage adjustment switch to the right and observe whether the pointer of the bidirectional ammeter increases positively as the speed voltage adjustment switch is rotated to the right. Slowly rotate the speed voltage adjustment switch to the left and observe whether the pointer of the bidirectional ammeter decreases negatively as the speed voltage adjustment switch is rotated to the left. During the rotation of the speed voltage adjustment switch to the right and left, observe whether the pointer of the bidirectional ammeter changes periodically and symmetrically with the change of speed voltage. If so, the performance of the servo amplifier board is qualified; if not, the performance of the servo amplifier board is unqualified.

[0051] This testing device is suitable for testing servo amplifier boards with PWM (Pulse Width Modulation) full-bridge power drive and current negative feedback closed-loop control. It can test the speed regulation and commutation functions of the circuit board when driving a motor. By connecting the motor to the output of the servo amplifier board and rotating the speed voltage adjustment switch, the device observes whether the motor responds promptly under the speed voltage control. By connecting a power resistor to the output of the servo amplifier board and modulating the PWM duty cycle using the voltage knob on the panel, the device observes the pointer reading of the bidirectional ammeter to test the performance of the servo amplifier board. The device also measures the symmetry of the motor output torque when the control signal input is given by PWM wave duty cycle polarity reversal. This method is highly efficient and easy to operate.

[0052] Taking the servo amplifier board of a night vision turret as an example, the following tests are performed:

[0053] Connect the dedicated interface of the servo amplifier board to the testing device, connect the testing device to a 220V power supply, ensure that all switches in the testing device are in the off state, and ensure that the speed adjustment knob, bidirectional ammeter, and analog motor pointer are all in the zero position.

[0054] Press the power button on the testing device and observe whether the indicator light on the servo amplifier board is constantly lit. If it is constantly lit, it means that the servo amplifier board has been powered on. Otherwise, the power enable signal line of the servo amplifier board under test is open. After the indicator light on the servo amplifier board is constantly lit, turn the power enable switch and motor enable switch of the testing device to the "on" state in sequence.

[0055] Set the motor / power resistor switch to the motor setting, rotate the speed adjustment knob, and observe whether the motor speed increases or decreases in sync with the knob's rotation.

[0056] Set the motor / power resistor switch to the resistance setting, turn the speed adjustment knob to the right, and observe whether the pointer of the bidirectional ammeter deflects to the right following the speed adjustment knob and reaches the rated maximum value; then turn the speed adjustment knob to the left and observe whether the pointer of the bidirectional ammeter deflects to the left following the speed adjustment knob and reaches the rated maximum value.

[0057] During the switching process, the pointer of the bidirectional ammeter changes periodically and symmetrically in accordance with the rotation of the speed adjustment knob. The actual measured values ​​are shown in Table 1.

[0058] Table 1 Comparison of Normal and Fault Values ​​of Bidirectional Ammeter

[0059]

[0060] As shown in Table 1, when the servo amplifier board is working normally, the current value of the corresponding bidirectional ammeter increases proportionally to the increase of the voltage value of the speed adjustment knob in the positive direction and decreases proportionally to the decrease in the negative direction. Conversely, when the servo amplifier board malfunctions, the corresponding current value changes irregularly.

[0061] Finally, it should be noted that the features mentioned and / or shown in the above description of exemplary embodiments of the present invention can be combined in the same or similar manner with one or more other embodiments, combined with features in other embodiments, or substituted for corresponding features in other embodiments. These combined or substituted technical solutions should also be considered to be included within the scope of protection of the present invention.

Claims

1. A servo power amplifier board testing device, characterized in that, include: The power supply module includes a primary transformer circuit and a secondary transformer circuit. The primary transformer circuit converts the input 220V AC power to 24V DC power. The secondary transformer circuit converts the 24V DC power to ±15V DC power. The 24V DC power is used to power the power supply module of the servo amplifier board, and the ±15V DC power is used to power the operational amplifier of the servo amplifier board. It also has a 24V DC power ground and a ±15V DC signal ground, and the power ground and signal ground are electrically isolated. The enable control module includes a power enable switch and a motor enable switch. Both the power enable switch and the motor enable switch are from the same power ground. The power enable switch is used to control the power supply of the servo amplifier board, so that the power amplifier module on the servo amplifier board has a source to generate PWM waves. The motor enable switch is used to enable the power amplifier module on the servo amplifier board to generate PWM waves. The detection module includes a motor, a bidirectional ammeter, a power resistor, a switching switch, and a speed and voltage adjustment switch. The bidirectional ammeter and the power resistor are connected in series and then in parallel with the motor. The switching switch switches the connection between the power resistor and the motor to the output of the servo amplifier board. The input of the servo amplifier board is connected to the speed and voltage adjustment switch, which is used to simulate the D / A signal from the external host computer. The motor and the bidirectional ammeter provide real-time feedback on the motor rotation under the PWM wave output and the controlled current during the motor rotation process, thereby detecting the output performance of the servo amplifier board.

2. The servo amplifier board testing device as described in claim 1, characterized in that, The secondary transformer circuit is a three-winding transformer with the same magnetic core, including an input winding, a positive output winding, and a negative output winding. The input winding is connected to 24V DC and is set with a power ground. The positive output winding outputs +15V DC, and the negative output winding outputs -15V DC. The positive and negative output windings share a signal ground.

3. The servo amplifier board testing device as described in claim 2, characterized in that, A filter capacitor C20 and a filter capacitor C21 are connected in parallel between the 24V DC input terminal and the power ground; a filter capacitor C31 is connected in parallel between the +15V DC output terminal and the signal ground; a positive voltage full-wave rectifier bridge is connected to both ends of the positive voltage output winding, and an NPN diode Q3 is connected between the +15V DC output terminal and the positive voltage full-wave rectifier bridge; a filter capacitor C41 is connected in parallel between the -15V DC output terminal and the signal ground; a negative voltage full-wave rectifier bridge is connected to both ends of the negative voltage output winding, and an NPN diode Q4 is connected between the -15V DC output terminal and the negative voltage full-wave rectifier bridge.

4. The servo amplifier board testing device as described in claim 1, characterized in that, The first-stage transformer circuit includes a rectifier and filter unit for converting 220V AC power to 24V DC power.

5. The servo amplifier board testing device as described in claim 1, characterized in that, The servo amplifier board testing device also includes a hollow outer shell, in which the power supply module and enable control module are installed. An operation panel is provided on one side of the outer wall of the shell. The operation panel is equipped with a power enable switch toggle button, a motor enable switch toggle button, and a speed adjustment knob. The power enable switch toggle button is connected to the power enable switch, the motor enable switch toggle button is connected to the motor enable switch, and the speed adjustment knob is connected to the speed voltage adjustment switch. A switch, a bidirectional ammeter, and the motor output head are installed on the operation panel.

6. The servo amplifier board testing device as described in claim 1, characterized in that, The detection module also includes an auxiliary detection port, which is connected to the output of the servo amplifier board. This auxiliary detection port is used to connect an oscilloscope to measure the output signal of the servo amplifier board when the servo amplifier board malfunctions.

7. The servo amplifier board testing device as described in claim 5, characterized in that, The side wall of the casing opposite the control panel is equipped with a fan for heat dissipation and a socket for connecting to the power supply.

8. A method for testing a servo amplifier board, used to test the servo amplifier board using the servo amplifier board testing device as described in any one of claims 1 to 7, characterized in that, The method includes the following steps: Step 1: Provide a stable 220V power supply to the testing device and turn off the power enable switch and motor enable switch. Then connect the servo amplifier board under test to the testing device through the debugging cable. Step 2: Connect the 220V power supply, and then turn on the power enable switch and the motor enable switch in sequence; Step 3: Rotate the switch to connect the motor to the output of the servo amplifier board. Slowly turn the speed voltage adjustment switch to the right to control the motor to rotate in the forward direction and observe whether the motor speed responds to the change in speed voltage. Slowly turn the speed voltage adjustment switch to the left to control the motor to rotate in the reverse direction and observe whether the motor speed responds to the change in speed voltage. If not, the servo amplifier board is not functioning properly. If yes, proceed to step 4 to perform performance testing. Step 4: Rotate the switch to connect the power resistor and bidirectional ammeter to the output of the servo amplifier board. Slowly rotate the speed voltage adjustment switch to the right and observe whether the pointer of the bidirectional ammeter increases positively as the speed voltage adjustment switch is rotated to the right. Slowly rotate the speed voltage adjustment switch to the left and observe whether the pointer of the bidirectional ammeter decreases negatively as the speed voltage adjustment switch is rotated to the left. During the rotation of the speed voltage adjustment switch to the right and left, observe whether the pointer of the bidirectional ammeter changes periodically and symmetrically with the change of speed voltage. If so, the performance of the servo amplifier board is qualified; if not, the performance of the servo amplifier board is unqualified.

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