CN115912267A - Common direct current bus pair dragging device based on servo drive - Google Patents
Common direct current bus pair dragging device based on servo drive Download PDFInfo
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- CN115912267A CN115912267A CN202211396299.8A CN202211396299A CN115912267A CN 115912267 A CN115912267 A CN 115912267A CN 202211396299 A CN202211396299 A CN 202211396299A CN 115912267 A CN115912267 A CN 115912267A
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- 238000004146 energy storage Methods 0.000 claims abstract description 46
- 239000003990 capacitor Substances 0.000 claims abstract description 25
- 238000012360 testing method Methods 0.000 claims abstract description 19
- 239000003381 stabilizer Substances 0.000 claims abstract description 17
- 230000005611 electricity Effects 0.000 claims abstract description 4
- 238000005070 sampling Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 abstract description 6
- 238000011105 stabilization Methods 0.000 abstract description 6
- 230000000740 bleeding effect Effects 0.000 description 9
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a common direct current bus dragging device based on servo drive, which comprises a load motor, a tested motor, a test torquemeter and an energy storage voltage stabilizer, wherein the energy storage voltage stabilizer is connected with a load driver and a test driver through the output end of a direct current bus; the energy storage voltage stabilizer comprises a rectifying circuit, an energy storage capacitor and a discharge resistor which are connected in sequence; when the tested driver works, the load driver controls the load motor to generate power; when the tested driver is started quickly or accelerated suddenly, the instantaneous current is increased, the bus voltage is reduced, and the energy storage capacitor releases energy to compensate the bus voltage; when the tested driver runs stably, the load driver drives the motor to generate electricity, the bus voltage rises, the energy storage capacitor absorbs energy and provides voltage for the tested driver, and the direct-current bus voltage is stabilized; when the driver to be tested brakes suddenly, the bus voltage jumps, the energy storage capacitor balances the voltage, and if the voltage exceeds the safety protection voltage, the discharge resistor releases the voltage. The invention has the characteristics of simple structure, energy saving, voltage stabilization and safe release.
Description
Technical Field
The invention relates to the technical field of motor butt-towing, in particular to a common direct current bus butt-towing device based on servo driving.
Background
With the rapid development of automation technology, servo drives take an absolute leading position in automation technology by means of precise control of current, speed and position. The innovation of automation technology places higher technical requirements on the reliability, safety, stability, etc. of the servo driver. Therefore, a good test method and a good test platform must be selected for testing the servo driver. The update must also be expedited for the drag-and-load test system as part of the servo drive system test platform.
Aiming at the loading test of a servo driver, special requirements such as simulation of high-speed start-stop, large-load start-up and low-speed load operation are required for a dragging loading test system. The traditional drag loading test system has the same problem that the instantaneous pull-down and rapid rush-up of the power grid voltage are caused at the moment of large-current starting and high-speed sudden stop of a servo driver. Therefore, the test of the servo driver has certain requirements on the voltage stabilization and energy storage of the power supply system.
However, the traditional drag-and-drop test platform only processes the load. The energy-saving type energy-saving brake has three main working modes, namely an energy-consuming brake type, an energy feedback power grid type and a mechanical energy storage type. The energy consumption braking type has the problem of serious energy consumption, and the tested driver and the braking drive both need to consume energy, so that the requirement on a power grid is high. And the energy generated by braking needs to be processed by additional equipment such as air cooling, water cooling and the like, so that the working noise is high, and the occupied space of the equipment is large. The latter two pairs have energy feedback or storage and are optimized in energy consumption, but have the problems of complex control system, high cost, harmonic pollution to a power grid and the like.
Disclosure of Invention
The invention aims to provide a common direct current bus dragging device based on servo drive, which has the advantages of simple structure, low cost, energy feedback function and voltage stabilization and energy storage functions.
In order to achieve the purpose, the invention adopts the following technical scheme:
a common direct current bus dragging device based on servo drive comprises a load motor, a tested motor, a test torquer and an energy storage voltage stabilizer, wherein two ends of the test torquer are respectively connected with the load motor and the tested motor through a coupler; the energy storage voltage stabilizer is used for providing direct current voltage for a load driver and a tested driver and comprises a rectifier, a soft start loop, an energy storage capacitor, a discharge MOS loop and a discharge resistor, wherein the rectifier, the soft start loop and the energy storage capacitor are sequentially connected, and the input end of the rectifier is connected with an alternating current power supply; the output end of the energy storage capacitor is respectively connected with the tested driver, the load driver and the discharge MOS loop, the discharge MOS loop is connected with the discharge resistor, and the AC power supply of the power grid outputs the DC power supply after entering the rectifier bridge;
when the tested driver works, the load driver controls the load motor to generate power; when the tested driver is started quickly or accelerated suddenly, the instantaneous current is increased, the bus voltage is reduced, and the energy storage capacitor releases energy to compensate the bus voltage; when the tested driver runs stably, the load driver drives the motor to generate electricity, the bus voltage rises, the energy storage capacitor absorbs energy and provides voltage for the tested driver to stabilize the DC bus voltage; when the driver to be tested brakes suddenly, the bus voltage surges, the energy storage capacitor balances the voltage, and if the voltage exceeds the safety protection voltage, the bleeder resistor releases the voltage.
Furthermore, the energy storage voltage stabilizer and the load driver are arranged in a box body.
Furthermore, a control panel connected with the load driver and the test driver is arranged on the box body.
Furthermore, the bleeding MOS loop is connected with a bleeding control loop, the bleeding control loop comprises a software bleeding control module and a hardware passive forced control circuit, the software bleeding control module adopts a software module to set a bleeding voltage value, when the voltage value exceeds the set bleeding voltage value, the bleeding MOS loop is controlled to be communicated, and redundant power is consumed through a bleeding resistor; the hardware passive forced control circuit is realized by adopting a voltage comparator and voltage sampling, the voltage comparator is connected with the discharge MOS loop, the voltage value of the voltage sampling is transmitted to the voltage comparator, the voltage value is compared by the voltage comparator to transmit a signal to the discharge MOS loop, the connection or disconnection of the voltage value is controlled, and then the discharge is realized.
Further, the voltage comparator is connected with a load controller, the load controller is connected with a load driver, the load controller is connected with an inverter output circuit, and the inverter output circuit is connected with a load motor; the inversion driving load motor can generate a reverse direct current signal, and the reverse direct current signal is transmitted to the direct current end of the energy storage capacitor through the load driver and the load controller to be used for dynamically monitoring the working state of the energy storage voltage stabilizer and dynamically loading control of the load driver.
The common direct current bus dragging device provided by the invention returns the power generated by the load motor to the energy storage voltage stabilizer for the load driver; the large capacitor in the energy storage voltage stabilizer has large current instantaneous starting voltage stabilization and rapid deceleration peak voltage absorption voltage stabilization, and the rapid release resistor device has a safe release loop to realize hardware-level voltage limiting protection; the device has the characteristics of simple structure, energy conservation, voltage stabilization and safe release.
Drawings
FIG. 1 is a schematic view of the present invention.
Fig. 2 is a schematic structural diagram of the energy storage voltage regulator of the present invention.
Fig. 3 is an inverter output circuit according to the present invention.
The labels in the figure are: 1. a motor to be tested; 2. a load motor; 3. a torque meter; 4. a coupling; 5. an energy storage voltage stabilizer.
Detailed Description
As shown in fig. 1, the common dc bus dragging device based on servo drive according to this embodiment includes a tested driver, a load driver, a torque measuring instrument and an energy storage voltage stabilizer, where two ends of the torque measuring instrument are respectively connected to the tested driver and the load driver through a coupler, and the tested driver, the load driver and the torque measuring instrument are mounted on a support to ensure stability of the device during testing.
The energy storage voltage stabilizer is used for providing direct current voltage for a load driver and a driver to be tested, and comprises a rectifier, a soft start loop, an energy storage capacitor, a discharge MOS loop and a discharge resistor, wherein the rectifier, the soft start loop and the energy storage capacitor are sequentially connected, and the input end of the rectifier is connected with an alternating current power supply; the output end of the energy storage capacitor is respectively connected with the tested driver, the load driver and the discharge MOS loop, the discharge MOS loop is connected with the discharge resistor, and after an alternating current power supply of a power grid enters a rectifier bridge, a direct current power supply is output.
The bleed-off circuit is connected with a bleed-off control loop, the bleed-off control loop comprises a software bleed-off control module and a hardware passive forced control circuit, the software bleed-off control module adopts a bleed-off voltage value arranged in the software module, when the voltage value exceeds the set bleed-off voltage value, the bleed-off MOS loop is controlled to be communicated, and redundant power is consumed through the bleed-off resistor. The hardware passive forced control circuit is realized by adopting a voltage comparator and voltage sampling, the voltage comparator is connected with the discharge MOS loop, when the software discharge control module starts to control the discharge to be out of work, the voltage sampling result is transmitted to the voltage comparator, and a voltage value is compared by the voltage comparator to transmit a signal to the discharge MOS loop so as to control the connection or disconnection of the voltage comparator, thereby realizing the discharge.
The voltage comparator is connected with a load controller, the load controller is connected with a load driver, the load motor is driven by the inverter to generate a reverse direct current signal and then is conveyed to the direct current end of the energy storage capacitor after passing through the load driver and the load controller, and meanwhile, the load controller is used for dynamically monitoring the working state of the energy storage voltage stabilizer and controlling the dynamic loading of the load driver.
The load motor is driven by inversion through an inversion output circuit, as shown in fig. 3, the inversion output circuit is respectively connected with the load driver and the load motor, when the load motor consumes energy and operates, the load driver controls the on-off of the inversion output circuit, further controls a mos circuit of the load driver, inverts direct current power supplies of VP + and VP-into alternating current power supplies, supplies power to the load motor through three UVW phases, and controls the operation of the load motor; when the load motor applies load to the tested motor, the load motor is in a power generation state. At the moment, a load motor generates three-phase alternating current through UVW, a load driver always controls the on-off of PWM 0-PWM 5, further controls an MOS circuit of the driver, the three-phase alternating current power supply is inverted into a direct current power supply, rectification is realized, and therefore VP + and VP-are charged.
When the tested driver works, the load driver controls the load motor to drive the load motor to generate power; when the tested driver is started quickly or accelerated suddenly, the instantaneous current is very large, the bus voltage is pulled down oppositely, and at the moment, the capacitor in the energy storage device releases energy quickly to compensate the bus voltage, so that the power grid voltage is prevented from being pulled too low; when the tested driver runs stably, the load driver drives the motor to generate electricity, so that the bus voltage is raised quickly, and at the moment, the capacitor in the energy storage device absorbs energy and supplies the energy to the tested driver for use, so that the bus voltage is prevented from fluctuating greatly, and the direct-current bus voltage is stabilized; when the driver measured scram, direct current bus voltage can surge rapidly, and the quick balanced partial voltage of electric capacity among the energy memory, if voltage still surpasss the safety protection voltage this moment, energy memory can open power resistance release circuit automatically, relies on power resistance to consume unnecessary electric energy, protection system tested equipment safety.
The voltage-stabilizing energy storage device, the load driver and the tested driver are arranged in a box body, a control panel is arranged on the outer side wall of the box body, and the control panel is connected with the load driver and the tested driver and used for controlling the torque size and direction of the load motor and controlling the dynamic torque motion curve.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be covered within the scope of the present invention.
Claims (5)
1. The utility model provides a be total to direct current bus and drag device based on servo drive, includes load motor, measured motor and test torquemeter, test torquemeter both ends are passed through the shaft coupling and are connected with load motor and measured motor respectively, and load motor connects the load driver, is measured the motor connection and is surveyed the driver, its characterized in that: the energy storage voltage stabilizer is connected with the load driver and the test driver through the output end of the direct current bus; the energy storage voltage stabilizer is used for providing direct current voltage for a load driver and a tested driver and comprises a rectifier, a soft start loop, an energy storage capacitor, a discharge MOS loop and a discharge resistor, wherein the rectifier, the soft start loop and the energy storage capacitor are sequentially connected, and the input end of the rectifier is connected with an alternating current power supply; the output end of the energy storage capacitor is respectively connected with the tested driver, the load driver and the discharge MOS loop, the discharge MOS loop is connected with the discharge resistor, and the AC power supply of the power grid outputs the DC power supply after entering the rectifier bridge;
when the tested driver works, the load driver controls the load motor to generate power; when the tested driver is started quickly or accelerated suddenly, the instantaneous current is increased, the bus voltage is reduced, and the energy storage capacitor releases energy to compensate the bus voltage; when the tested driver runs stably, the load driver drives the motor to generate electricity, the bus voltage rises, the energy storage capacitor absorbs energy and provides voltage for the tested driver to stabilize the DC bus voltage; when the driver to be tested brakes suddenly, the bus voltage surges, the energy storage capacitor balances the voltage, and if the voltage exceeds the safety protection voltage, the bleeder resistor releases the voltage.
2. The servo drive based common direct current bus dragging device according to claim 1, wherein: the energy storage voltage stabilizer and the load driver are arranged in a box body.
3. The servo drive-based common DC bus pair dragging device according to claim 2, wherein: and the box body is provided with a control panel connected with the load driver and the test driver.
4. The servo drive based common direct current bus dragging device according to claim 1, wherein: the device comprises a software module, a software leakage control module, a leakage resistor, a leakage MOS loop and a hardware passive forced control circuit, wherein the software leakage control module adopts a leakage voltage value set in the software module, and controls the leakage MOS loop to be communicated when the voltage value exceeds the set leakage voltage value, so that redundant power is consumed through the leakage resistor; the hardware passive forced control circuit is realized by adopting a voltage comparator and voltage sampling, the voltage comparator is connected with the discharge MOS loop, the voltage value of the voltage sampling is transmitted to the voltage comparator, the voltage value is compared by the voltage comparator to transmit a signal to the discharge MOS loop, the connection or disconnection of the voltage value is controlled, and then the discharge is realized.
5. The servo drive-based common DC bus pair dragging device according to claim 4, wherein: the voltage comparator is connected with a load controller, the load controller is connected with a load driver, the load controller is connected with an inversion output circuit, and the inversion output circuit is connected with a load motor; the inversion driving load motor can generate a reverse direct current signal, and the reverse direct current signal is transmitted to the direct current end of the energy storage capacitor through the load driver and the load controller to be used for dynamically monitoring the working state of the energy storage voltage stabilizer and dynamically loading control of the load driver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211396299.8A CN115912267B (en) | 2022-11-09 | 2022-11-09 | Servo-drive-based common direct current bus opposite-dragging device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211396299.8A CN115912267B (en) | 2022-11-09 | 2022-11-09 | Servo-drive-based common direct current bus opposite-dragging device |
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| Publication Number | Publication Date |
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| CN115912267A true CN115912267A (en) | 2023-04-04 |
| CN115912267B CN115912267B (en) | 2023-11-21 |
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| CN202211396299.8A Active CN115912267B (en) | 2022-11-09 | 2022-11-09 | Servo-drive-based common direct current bus opposite-dragging device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112838751A (en) * | 2019-11-22 | 2021-05-25 | 比亚迪股份有限公司 | Active discharge circuit of motor controller and discharge control method thereof |
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2022
- 2022-11-09 CN CN202211396299.8A patent/CN115912267B/en active Active
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| JP2006006085A (en) * | 2004-06-21 | 2006-01-05 | Matsushita Electric Ind Co Ltd | Inverter controller for driving motor |
| CN2921850Y (en) * | 2006-06-23 | 2007-07-11 | 上海御能动力科技有限公司 | Double DC bus structural four-quadrant electric machine dynamometer |
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| CN115912267B (en) | 2023-11-21 |
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