CN-121995197-A - Servo power amplification board detection device and method

CN121995197ACN 121995197 ACN121995197 ACN 121995197ACN-121995197-A

Abstract

The invention provides a detection device and a detection method of a servo power amplification board, which belong to the technical field of motor drive control, wherein the detection device comprises a power supply module, an enabling control module and a detection module, the enabling control module comprises a power 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 change-over switch is connected to the output end of the servo power amplification board through the change-over switch or the power resistor, the input end of the servo power amplification board is connected with the rotating speed voltage regulating switch, the D/A signal input from the outside of a system is simulated by the rotating speed voltage regulating switch in the detection module, PWM wave duty ratio modulation for power driving of the servo power amplification board is completed, and the speed change and the direction change of the servo power amplification board and the real state of the simulated motor under the control of the servo power amplification board are detected through the detection module, so that whether the functions and performances of the servo power amplification board meet actual use requirements or not are detected.

Inventors

PEI XIAOWU
JI YONG
YAN SHAOQI
XUE FEI
YANG JIE
ZHANG JIANGFEI
YAN XU
ZHANG CHAOYUE
TONG YU
FENG JIACHENG
JIANG TINGTING
CUI YING

Assignees

西安应用光学研究所

Dates

Publication Date: 20260508
Application Date: 20260209

Claims (8)

1. A servo power amplifier board detection device is characterized by comprising: The power supply module comprises a primary voltage transformation circuit and a secondary voltage transformation circuit, wherein the primary voltage transformation circuit converts the accessed 220V alternating current into 24V direct current, the secondary voltage transformation circuit is used for converting the 24V direct current into +/-15V direct current, the 24V direct current is used for supplying power to a power supply module of the servo power amplification board, the +/-15V direct current is used for supplying power to an operational amplifier of the servo power amplification board, and a power ground of the 24V direct current and a signal ground of the +/-15V direct current are arranged, and the power ground is electrically isolated from the signal ground; the power supply enabling switch and the motor enabling switch are homologous to power ground, the power supply enabling switch is used for controlling the power on-off of the servo power amplification board, the power amplification module on the servo power amplification board is provided with a source for generating PWM waves, and the motor enabling switch is used for enabling the power amplification module of the servo power amplification board to generate PWM waves; The detection module comprises a motor, a bidirectional ammeter, a power resistor, a change-over switch and a rotating speed voltage regulating switch, wherein the bidirectional ammeter is connected with the power resistor in series and then connected with the motor in parallel, the power resistor is switched through the change-over switch or the motor is connected to the output end of the servo power amplification board, the input end of the servo power amplification board is connected with the rotating speed voltage regulating switch, the rotating speed voltage regulating switch is used for simulating a D/A signal of an external upper computer, and the motor and the bidirectional ammeter feed back controlled current in the rotation process of the motor under PWM wave output in real time, so that the output performance of the servo power amplification board is detected.
2. The servo power amplifier board detection device of claim 1, wherein the secondary transformer circuit is a common-core three-winding transformer structure and comprises an input winding, a positive voltage output winding and a negative voltage output winding, wherein the input winding is connected with 24V direct current and is provided with power ground, the positive voltage output winding outputs +15V direct current, the negative voltage output winding outputs-15V direct current, and the positive voltage output winding and the negative voltage output winding share one signal ground.
3. The servo power amplifier board detection device according to claim 2, wherein a filter capacitor C20 and a filter capacitor C21 are connected in parallel between the 24V direct current input end and the power ground, a filter capacitor C31 is connected in parallel between the +15V direct current output end and the signal ground, a positive pressure full wave rectifier bridge is connected at both ends of the positive pressure output winding, an NPN diode Q3 is connected between the +15V direct current output end and the positive pressure full wave rectifier bridge, a filter capacitor C41 is connected in parallel between the-15V direct current output end and the signal ground, a negative pressure full wave rectifier bridge is connected at both ends of the negative pressure output winding, and an NPN diode Q4 is connected between the-15V direct current output end and the negative pressure full wave rectifier bridge.
4. The servo power amplifier board inspection apparatus of claim 1, wherein said primary transformer circuit comprises a rectifying filter unit for converting 220V ac level into 24V dc.
5. The servo power amplifier board detection device of claim 1, further comprising a hollow housing, wherein the power supply module and the enabling control module are arranged in the housing, an operation panel is arranged on the outer wall of one side surface of the housing, a power enabling switch shift button, a motor enabling switch shift button and a rotating speed adjusting knob are arranged on the operation panel, the power enabling switch shift button is connected with the power enabling switch, the motor enabling switch shift button is connected with the motor enabling switch, the rotating speed adjusting knob is connected with the rotating speed voltage adjusting switch, and the change-over switch, the bidirectional ammeter and an output head of the motor are arranged on the operation panel.
6. The device for detecting a servo power amplifier board as claimed in claim 1, wherein the detecting module further comprises an auxiliary detecting port connected to an output end of the servo power amplifier board for connecting with an oscilloscope when the servo power amplifier board fails, and measuring an output signal of the servo power amplifier board.
7. The servo power amplifier board inspection apparatus of claim 5, wherein a fan for heat dissipation and a socket for connection to a power supply are provided on a side wall of the housing opposite to the operation panel.
8. A method for detecting a servo power amplifier board, which is used for detecting the servo power amplifier board by using the servo power amplifier board detection device according to any one of claims 1 to 7, and is characterized by comprising the following steps: Step 1, providing stable 220V power supply for a detection device, enabling a power supply enabling switch and a motor enabling switch to be in a closed state, and then connecting a servo power amplification board to be detected with the detection device through a debugging cable; step 2, switching on a 220V power supply, and sequentially controlling to switch on a power supply enabling switch and a motor enabling switch; Step 3, rotating the change-over switch to enable the motor to be connected to the output end of the servo power amplification board, slowly rotating the rotating speed voltage regulating switch to the right to control the motor to rotate positively and observing whether the rotating speed of the motor can respond with the change of the rotating speed voltage; And 4, rotating the change-over switch to enable the power resistor and the bidirectional ammeter to be connected to the output end of the servo power amplification board, slowly rotating the rotating speed voltage regulating switch to the right, observing whether the pointer of the bidirectional ammeter is positively increased along with the rightward rotation of the rotating speed voltage regulating switch, slowly rotating the rotating speed voltage regulating switch to the left, observing whether the pointer of the bidirectional ammeter is negatively reduced along with the leftward rotation of the rotating speed voltage regulating switch, observing whether the pointer of the bidirectional ammeter is periodically and symmetrically changed along with the change of the rotating speed voltage in the process of rotating the rotating speed voltage regulating switch to the right and rotating the rotating speed voltage regulating switch to the left, if so, judging that the performance of the servo power amplification board meets the standard, and if not, judging that the performance of the servo power amplification board does not meet the standard.

Description

Servo power amplification board detection device and method Technical Field The invention belongs to the technical field of motor drive control, and particularly relates to a servo power amplification board detection device and a servo power amplification board detection method. Background The servo power amplification board is a high-performance motor driving system integrating an analog circuit and a signal processing technology, is a core component of the servo system, mainly converts a control signal into high-power current and voltage required by a driving motor, realizes speed regulation and reversing of the controlled motor by modulating a PWM duty ratio, directly determines the response speed, precision and reliability of the whole servo system by the performance of the servo power amplification board, is generally integrated in the photoelectric turret, realizes driving control of four motors in the photoelectric turret, and ensures high-precision and high-dynamic response target tracking and imaging stability. The servo power amplification board is easy to generate various faults caused by welding, improper assembly or unqualified device performance in the batch production process, and particularly has the phenomena of out-of-control band-type brake of a motor, high-frequency howling of the motor, response of overspeed or slow climbing, overlarge zero offset, high-frequency jitter of a system and the like. At present, due to the lack of a special testing device, the servo power amplifier board cannot perform independent function test and performance detection after production is completed. Whether the core function of the servo power amplifier board normally operates or not and whether the key performance index meets the design specification or not cannot be obtained before the servo power amplifier board is used. This directly results in the quality state of the servo power amplifier board before installation being in an "unknown" state. It can only be loaded into the final complete machine product and the potential problem can be indirectly exposed depending on the operation of the whole system. The delayed fault discovery mechanism not only causes the problem that the servo power amplification board flows into a subsequent production link and a final product, but also is more serious in that when the whole system is abnormal, the problem that the root of the fault is the servo power amplification board, other related components or the system integration matching problem is difficult to distinguish rapidly and accurately, so that the complexity, time and cost of fault diagnosis are greatly increased. Disclosure of Invention The invention aims to solve the problem that the existing servo power amplification board does not have a special detection device for measuring the performance and the function, and provides a servo power amplification board detection device and a servo power amplification board detection method. In order to achieve the above purpose, the technical solution provided by the present invention is: The device comprises a power supply module, an enabling control module and a detection module; the power supply module comprises a primary voltage transformation circuit and a secondary voltage transformation circuit, and the primary voltage transformation circuit converts the accessed 220V alternating current into 24V direct current; the secondary transformer circuit is used for converting 24V direct current into +/-15V direct current, the +/-15V direct current is used for supplying power to a power supply module of the servo power amplification board, the +/-15V direct current is used for supplying power to an operational amplifier of the servo power amplification board, the power ground of the 24V direct current and the signal ground of the +/-15V direct current are arranged, the power ground is electrically isolated from the signal ground, the enabling control module comprises a power enabling switch and a motor enabling switch, the power enabling switch and the motor enabling switch are homologous to the power ground, the power enabling switch is used for controlling the on-off of a power supply of the servo power amplification board, the power amplification module on the servo power amplification board is provided with a source for generating PWM waves, the motor enabling switch is used for enabling the power amplification module of the servo power amplification board to generate PWM waves, the detection module comprises a motor, a bidirectional ammeter, a power switch and a rotating speed voltage regulating switch, the bidirectional ammeter is connected with the motor in parallel after being connected with the power resistor in series, the power resistor and the bidirectional ammeter are used for simulating loads, the motor is connected to the output end of the servo power amplification board through the switch, the rotating speed regulating switch is used for simulating the mo