Anti-interference electricity aging test system structure of frequency converter

Abstract

The utility model relates to the technical field of aging test, in particular to an anti-interference electricity aging test system structure of a frequency converter. The power supply control unit is used for connecting a three-phase mains supply and controlling a power supply; the main control unit is mutually connected with the power supply control unit and is used for simulating the occurrence of interference electricity; the plurality of sub-control units are connected with the main control unit; a group of frequency converter anti-interference electricity devices are correspondingly connected with the sub-control units in a matched manner; the data of the sub-control unit is transmitted to the main control unit through a communication bus, and the sub-control unit comprises a data acquisition and transmission unit and an analog control unit. According to the technical scheme of the utility model, the batch aging test platform for the frequency converter anti-interference electricity device can carry out interference electricity simulation on the control phase voltage and the three-phase voltage, and can read the operation condition of the anti-interference electricity device through the sub-control unit. And the sub-control unit exchanges data with the main control unit through the communication bus, so that the test accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aging testing, in particular to a structure of an aging testing system for preventing power sags of a frequency converter. Background Art

[0002] In the prior art, the aging test platform for the power sag prevention device of the frequency converter can only be tested one by one, and the test results cannot be transmitted in real time. Therefore, the efficiency is low, and a large amount of time is required to detect it.

[0003] Therefore, it is necessary to design a structure of an aging testing system for preventing power sags of a frequency converter to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a structure of an aging testing system for preventing power sags of a frequency converter to overcome the above-mentioned deficiencies existing in the current prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A structure of an aging testing system for preventing power sags of a frequency converter, which includes a power control unit used to connect three-phase mains electricity and control the power supply, a main control unit connected to the power control unit and used to simulate the occurrence of power sags, several sub-control units connected to the main control unit, and a group of power sag prevention devices of the frequency converter corresponding to each sub-control unit. The data of the sub-control unit is transmitted to the main control unit through a communication bus. The sub-control unit includes a data acquisition and transmission unit and a simulation control unit.

[0007] Preferably, the power control unit includes a main power switch, a single-phase autotransformer, a three-phase voltage regulator, a control power switch used to control the on-off switch of the single-phase autotransformer, a three-phase power switch used to control the on-off switch of the three-phase voltage regulator, a single-phase solid-state relay, and a three-phase solid-state relay. The main control unit is connected to the single-phase solid-state relay through signal control and connected to the three-phase solid-state relay through signal control. The single-phase solid-state relay is used to cooperate with the control power switch, and the three-phase solid-state relay is used to cooperate with the three-phase power switch.

[0008] Preferably, the main control unit includes an AC / DC switching power supply module, an output DC terminal, a DC / DC power supply module, an output VCC terminal, a microprocessor and several peripheral circuit energies thereof. It also includes several voltage transmitters TV1, TV2, and TV3 connected to the microprocessor.

[0009] The microprocessor controls the on-off of two groups of external output control optocouplers and is connected to the power control unit to control the on-off of the power control unit and simulate power sags.

[0010] The microprocessor is also externally connected with two serial interfaces, namely UART1 and UART2. Two groups of serial interfaces are respectively externally connected with a human-machine interface and a sub-control unit through a communication module.

[0011] Preferably, a network port is provided on the inverter anti-power-failure device. The data acquisition and transmission unit includes a power supply port VCC and GND externally connected to the network port, a microprocessor and its peripheral circuits connected by the power supply port VCC through a linear power supply LDO, and the microprocessor and its peripheral circuits are connected to a communication bus through a communication module.

[0012] Preferably, the microprocessor and its peripheral circuits are also provided with a serial port and are connected with a second communication module, and are connected to the communication bus through the second communication module. A communication address adjustment device is externally connected to the microprocessor and its peripheral circuits. A triode is externally connected to the microprocessor and its peripheral circuits, and an output quantity control unit for controlling the triode is arranged between the triode and the microprocessor and its peripheral circuits. A signal sending end for driving the relay to break is externally connected to the triode.

[0013] Preferably, a plurality of terminal interfaces and normally open contacts for externally connecting lines are provided on the inverter anti-power-failure device. The analog control unit includes a middle relay externally connected to the normally open contact, a KA control coil externally connected to the middle relay, and a relay externally connected to the interface terminal of the inverter anti-power-failure device.

[0014] Preferably, a red light is also externally connected to the terminal interface of the inverter anti-power-failure device, and a closing switch is arranged between the terminal interface connected with the red light and the interface terminal of the relay.

[0015] The beneficial effects of the present invention are as follows: This technical solution provides a batch aging test platform for the inverter anti-power-failure device to improve the test effect. The test platform can simulate power failures for the control phase voltage L' and three-phase voltages L1', L2', L3'. It can also read the operation status of the anti-power-failure device through the sub-control unit, and the sub-control unit exchanges data with the main control unit through the communication bus, thereby improving the test accuracy. Description of the Drawings

[0016] Figure 1 It is a structural block diagram of a structure of an inverter anti-power-failure aging test system of the present invention;

[0017] Figure 2 It is a schematic diagram of a power supply control unit of a structure of an inverter anti-power-failure aging test system of the present invention;

[0018] Figure 3 It is a schematic diagram of a main control unit of a structure of an inverter anti-power-failure aging test system of the present invention;

[0019] Figure 4Schematic diagram of the sub-control unit of the structure of an anti-voltage-sag aging test system for an inverter of the present utility model; Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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 thus should not be construed as a limitation of the present utility model.

[0022] Referring to Figures 1 to 4 , an anti-voltage-sag aging test system for an inverter, which includes a power control unit used to connect to three-phase mains power and control the power supply, a main control unit connected to the power control unit and used to simulate the occurrence of voltage sags, several sub-control units connected to the main control unit, and a group of inverter anti-voltage-sag devices respectively connected in cooperation with the sub-control units;

[0023] The main control unit can read the data of the sub-control unit through the communication bus, and then monitor the test operation status of the inverter anti-voltage-sag.

[0024] The main control unit can perform test work periodically. If a certain anti-voltage-sag device is abnormal, it will alarm through the human-machine interface to notify the personnel for handling.

[0025] The power control unit includes a main power switch KK-1, a single-phase autotransformer TY-1, a three-phase voltage regulator TY-2, a control power switch KK-2 used to control the on-off switch of the single-phase autotransformer, a three-phase power switch KK-3 used to control the on-off switch of the three-phase voltage regulator, a single-phase solid-state relay SSR1, and a three-phase solid-state relay SSR2; the main control unit 2 is connected to the single-phase solid-state relay SSR1 through the signal control KSR1 and is connected to the three-phase solid-state relay SSR2 through the signal control KSR2, and the single-phase solid-state relay SSR1 is used to cooperate with the control power switch KK-2, and the three-phase solid-state relay SSR2 is used to cooperate with the three-phase power switch KK-3;

[0026] The function of the voltage regulator is to adjust the working voltage of the anti - power - fluctuation device. The control signals KSR1 and KSR2 of the solid - state relay can control the on - off of the solid - state relay, and the off - time is controlled by the main control unit (M - UINT) to simulate the occurrence of power fluctuations.

[0027] The main control unit is the core of the entire control system. It can control the power control unit and communicate with the sub - control unit (F - UINT) to exchange data on the detection results. It includes an AC / DC switching power supply module with a DC output terminal, a DC / DC power supply module with a VCC output terminal, a microprocessor and several peripheral circuit components for energy. It also includes several voltage transmitters TV1, TV2, and TV3 connected to the microprocessor, which convert strong voltage into weak voltage and enter the microprocessor for ADC conversion into digital quantities for calculation. The microprocessor is externally connected to two output control optocouplers DO1 and DO2 to control their on - off, and is connected to two solid - state relays SSR1 and SSR2 of the power control unit to control the on - off of the two solid - state relays SSR1 and SSR2 of the power control unit to simulate power fluctuations. The microprocessor is also externally connected to two serial interfaces, namely UART1 and UART2. The two serial interfaces communicate with the human - machine interface and the sub - control unit respectively through the RS485 communication module. Thus, signal transmission and control are carried out through the human - machine interface.

[0028] The sub - control unit is electrically connected to the inverter anti - power - fluctuation device one - to - one. The sub - control unit includes a data acquisition and transmission unit and an analog control unit. The inverter anti - power - fluctuation device is provided with a network port. The data acquisition and transmission unit includes an external power supply port VCC and GND on the network port, a microprocessor and its peripheral circuits connected by the power supply port VCC through a linear power supply LDO, and the microprocessor and its peripheral circuits are connected to the communication bus through a communication module.

[0029] The power supply ports VCC and GND are used to supply energy to the sub - control unit. The power supply port VCC is connected to the microprocessor and its peripheral circuits through a linear power supply LDO. The microprocessor and its peripheral circuits are also provided with a serial port UART1, which communicates with the inverter anti - power - fluctuation device through a communication module for data communication.

[0030] The microprocessor and its peripheral circuits are also provided with a serial port UART2 and are connected to a second communication module, which is connected to the communication bus through the second communication module and transmits data to the main control unit through the communication bus.

[0031] In order to effectively cooperate with different signals for connection, the microprocessor and its peripheral circuits are externally connected to a communication address adjustment device. The communication address adjustment device is provided with ADR*10 and ADR*1, where ADR*10 has 10 bits set and ADR*1 sets the units digit of the address.

[0032] A triode T is externally connected to the microprocessor and its peripheral circuits, and an output quantity control unit DO for controlling the triode T is arranged between the triode T and the microprocessor and its peripheral circuits. A signal sending end TJZ for driving the relay to break is externally connected to the triode T.

[0033] The frequency converter anti-power-failure device is provided with interfaces for externally connecting lines, specifically: a control phase voltage L' interface, interfaces for three-phase voltages L1', L2', L3', and several other interface terminals.

[0034] Contact signals are connected to the interface terminals of the frequency converter anti-power-failure device, and the interface terminals are 8 / 12.

[0035] The frequency converter anti-power-failure device is also provided with normally open contacts, and the contacts are 4\5.

[0036] The analog control unit includes a middle relay KA externally connected to the normally open contacts, a KA control coil externally connected to the middle relay KA, and a relay TJZ externally connected to the interface terminals of the frequency converter anti-power-failure device.

[0037] When disconnected, the KA control coil loses power, and its function is equivalent to a trip button. Specifically, the middle relay KA simulates the operation control of the frequency converter. When it is closed, the KA control coil can control the normally open contacts of terminals 4 and 5 of the anti-power-failure device to close through the sub-control unit, and the middle relay KA is started.

[0038] A relay TJZ is externally connected to the interface terminals of the frequency converter anti-power-failure device, and the relay TJZ is connected to the normally open contacts to form a loop; the relay TJZ is controlled by the triode to break.

[0039] In order to quickly know the start signal of KA, a red light HR is also externally connected to the terminal interface of the frequency converter anti-power-failure device, and the terminal for cooperating with the red light HR is 13. A closed switch is arranged between the terminal interface connected with the red light HR and the interface terminal of the relay TJZ. The red light HR is connected to terminal 13 of the anti-power-failure device. When KA is closed, terminals 13 and 14 of the anti-power-failure device are closed, and the red light is lit as an indication signal for KA start. The other end of the red light is connected to terminal 15 of the frequency converter anti-power-failure device. At the same time, the circuit of the KA control coil and the red light is connected to form a loop. The other end of the relay TJZ is connected to terminal interface 14 of the frequency converter anti-power-failure device.

[0040] The beneficial effects of the present utility model are as follows. This technical solution provides a batch aging test platform for the anti-voltage-sag device of the frequency converter to improve the test effect. The test platform can simulate voltage sags for the control phase voltage L' and the three-phase voltages L1', L2', and L3'. It can also read the operating conditions of the anti-voltage-sag device through the sub-control unit, and the sub-control unit exchanges data with the main control unit through the communication bus, thereby improving the test accuracy.

[0041] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent substitutions or changes should be covered within the protection scope of the present utility model.

Claims

1. A frequency converter anti-power sway aging test system structure, characterized by: It includes a power control unit for connecting to three-phase mains power and controlling the power supply, a main control unit which is interconnected with the power control unit and is used to simulate the occurrence of power swings, a number of sub-control units connected to the main control unit, and a group of inverter anti-power swing devices corresponding to the sub-control units. The data of the sub-control units are transmitted to the main control unit through a communication bus. The sub-control units include a data acquisition and transmission unit and a simulation control unit.

2. The inverter anti-power-shaking aging test system structure according to claim 1 is characterized by: The power control unit includes a main power switch, a single-phase auto voltage regulator, a three-phase voltage regulator, a control power switch for controlling the single-phase auto voltage regulator to turn on the switch, a three-phase power switch for controlling the three-phase voltage regulator to turn on the switch, a single-phase solid-state relay, and a three-phase solid-state relay; the main control unit is connected to the single-phase solid-state relay through signal control and to the three-phase solid-state relay through signal control, and the single-phase solid-state relay is used to cooperate with the control power switch, and the three-phase solid-state relay is used to cooperate with the three-phase power switch.

3. The inverter anti-power sway aging test system structure according to claim 1 is characterized by: The main control unit includes an AC / DC switching power supply module, an output DC terminal, a DC / DC power supply module, an output VCC terminal, a microprocessor and several peripheral circuit energies; It also includes several voltage transmitters TV1\TV2\TV3 connected to the microprocessor; The microprocessor is connected to two sets of external output control optocouplers, and is connected to the power control unit to control the power control unit to simulate power shaking; The microprocessor is also externally connected to two serial interfaces, namely UART1 and UART2. The two sets of serial interfaces are externally connected to the human-machine interaction interface and the sub-control unit through the communication module.

4. The inverter anti-power-shaking aging test system structure according to claim 1 is characterized by: The inverter anti-electrical shaking device is provided with a network port, and the data acquisition and transmission unit includes power supply ports VCC and GND externally connected to the network port, a microprocessor and peripheral circuits connected to the power supply port VCC through a linear power supply LDO, and the microprocessor and peripheral circuits are connected to a communication bus through a communication module.

5. The inverter anti-power-shaking aging test system structure according to claim 4 is characterized in that: The microprocessor and the peripheral circuit are also provided with a serial port, and are connected to a second communication module, and are connected to a communication bus through the second communication module. The microprocessor and the peripheral circuit are externally connected to a communication address adjustment device, and the microprocessor and the peripheral circuit are externally connected to a triode, and an output control unit for controlling the triode is provided between the triode and the microprocessor and the peripheral circuit, and the triode is externally connected to a signal sending end for driving a relay to disconnect.

6. The inverter anti-power-shaking aging test system structure according to claim 1 is characterized by: The inverter anti-electrical sway device is provided with several terminal interfaces and normally open contacts for external circuits, and the analog control unit includes an intermediate relay externally connected to the normally open contact, a KA control coil externally connected to the intermediate relay, and a relay externally connected to the interface terminal of the inverter anti-electrical sway device.

7. The inverter anti-power-shaking aging test system structure according to claim 6 is characterized by: The terminal interface of the inverter anti-electrical shaking device is also externally connected to a red light, and a closing switch is arranged between the terminal interface connected to the red light and the interface terminal of the relay.

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