CN215116550U - Elevator variable frequency driver test system - Google Patents
Elevator variable frequency driver test system Download PDFInfo
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- CN215116550U CN215116550U CN202120609507.2U CN202120609507U CN215116550U CN 215116550 U CN215116550 U CN 215116550U CN 202120609507 U CN202120609507 U CN 202120609507U CN 215116550 U CN215116550 U CN 215116550U
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Abstract
The utility model provides an elevator variable frequency driver test system, it includes testboard and to the platform of dragging, be equipped with test controller, the variable frequency driver that awaits measuring, load variable frequency driver and energy feedback unit on the testboard, be equipped with the hauler that awaits measuring and load hauler to the platform of dragging, the hauler that awaits measuring links to each other by the shaft coupling with the load hauler and constitutes to dragging the structure, the variable frequency driver that awaits measuring connects and drives the hauler that awaits measuring, load variable frequency driver connects and drives the load hauler, the transformer that awaits measuring, frequency driver and load variable frequency driver are controlled by respectively test controller; and a three-phase ammeter is arranged between the variable frequency driver to be tested and the tractor to be tested. The utility model discloses system architecture is simple, the connection is convenient, can simulate frequency conversion driver and roll off the production line back to multiple operating modes such as elevator functioning speed, the actual load of work, use oscilloscope or three-phase ammeter can observe real-time current, improve efficiency of software testing.
Description
Technical Field
The utility model relates to an elevator variable frequency driver test system.
Background
The power source of the elevator car is a traction machine which is driven by a variable frequency driver to operate, so the variable frequency driver occupies an important position in an elevator system, and the working principle is as follows: the three-phase 380Vac power supply is input into a variable frequency driver, and forms direct current high voltage through the internal rectification of the variable frequency driver, the direct current high voltage is loaded on an IGBT module, the direct current inversion variable frequency output is realized by controlling the switch of the IGBT module, and the variable frequency driver drives a traction machine to work in an electric state, namely, the elevator is in a light load descending state or a heavy load ascending state. When the traction machine works in a power generation mode, namely the elevator runs upwards under light load or runs downwards under heavy load, the output alternating current of the traction machine passes through the anti-parallel diode in the IGBT to boost the voltage of the internal bus of the variable-frequency driver. Due to the cost limitation, most elevators do not use a four-quadrant variable frequency drive, so that the part of energy cannot be inverted and fed into a network, but the part of energy must be discharged, otherwise, overvoltage damage such as Insulated Gate Bipolar Translator (IGBT) and the like can be caused. Meanwhile, after the variable frequency driver is offline, the variable frequency driver is used for various elevators, the running speed of each elevator, the actual load in work and the like are different, so that various working conditions in the actual application of the variable frequency driver need to be simulated in a test stage, the actual elevator test is obviously unrealistic and inconvenient, and a device needs to be designed to test various performance indexes of the variable frequency driver.
SUMMERY OF THE UTILITY MODEL
Based on the background art, the utility model provides an elevator variable frequency drive test system solves the variable frequency drive performance test problem before rolling off the production line, and its concrete technical content is as follows:
the utility model discloses an elevator variable frequency driver test system includes testboard and to dragging the platform, be equipped with test controller, the variable frequency driver that awaits measuring, load variable frequency driver and energy repayment unit on the testboard, be equipped with hauler and the load hauler that awaits measuring on dragging the platform, the hauler that awaits measuring links to each other with the load hauler by the shaft coupling and constitutes to dragging the structure, the variable frequency driver that awaits measuring connects and drives the hauler that awaits measuring, load variable frequency driver connects and drives the load hauler, the variable frequency driver that awaits measuring and load variable frequency driver are controlled by respectively test controller; and a three-phase ammeter is arranged between the variable frequency driver to be tested and the tractor to be tested.
In one or more embodiments of the present invention, the frequency conversion driver to be tested is connected to the brake resistor through the contactor.
In one or more embodiments of the present invention, the frequency conversion driver to be tested is connected to the discharge resistor through the contactor.
In one or more embodiments of the present invention, the test board has a metal object placing surface, the frequency conversion driver to be tested is placed on the metal object placing surface, and the shell of the frequency conversion driver is in contact with the metal object placing surface to realize grounding.
In the middle of one or more embodiments of the utility model, the input side of the variable frequency drive ware that awaits measuring is equipped with the input control contactor, and its output side is equipped with the output control contactor, the input control contactor is used for connecting the distribution end, the output control contactor is used for connecting the hauler that awaits measuring.
In the middle of one or more embodiments of the utility model, the testboard passes through the cable and realizes electrical connection to the platform, and it is equipped with and is used for the butt joint a plurality of binding post and the electric wire of frequency conversion driver that awaits measuring.
In one or more embodiments of the present invention, the temperature control switches of the traction machine to be tested and the load traction machine are connected in series with the enabling power supply signal of the variable frequency driver to be tested, respectively.
The utility model has the advantages that: the system has simple structure and comprises a test board and a pair of dragging tables, the variable frequency driver to be tested is placed on the test board through a contactor and is connected with the test board, various performance indexes of the frequency converter are automatically tested, various working conditions such as the running speed of an elevator, the actual load in work and the like facing the variable frequency driver after the variable frequency driver is off line can be simulated, real-time current can be observed by using an oscilloscope or a three-phase ammeter, the index is up to the standard when the current is output in place, the functions of inputting phase loss, outputting short circuit (including phase-to-phase and ground short circuit), braking and the like can be performed, meanwhile, the rapid discharge test can be performed through a discharge resistor, and the safety and the test efficiency are effectively improved. In addition, only the frequency conversion driver to be tested needs to be replaced, so that the test controller, the load frequency conversion driver, the brake resistor, the discharge resistor, the energy feedback unit and the like are directly and integrally installed on the test board, and the quick connector is selected in the connection mode of the frequency conversion driver to be tested and the test board, so that the frequency conversion driver is convenient to disassemble, assemble and replace, and the test efficiency is improved.
Drawings
Fig. 1 is a schematic diagram of the system architecture of the present invention.
Fig. 2 is one of the schematic structural diagrams of the test board and the counter-dragging board of the present invention.
Fig. 3 is a second schematic structural diagram of the test platform and the counter-dragging platform of the present invention.
Detailed Description
The scheme of the present application is further described below with reference to the accompanying figures 1 to 3:
the elevator variable frequency driver testing system comprises a testing platform 1 and a counter-dragging platform 2, wherein a testing controller 3, a variable frequency driver 4 to be tested, a load variable frequency driver 5 and an energy feedback unit 12 are arranged on the testing platform 1, a tractor 6 to be tested and a load tractor 7 are arranged on the counter-dragging platform 2, the tractor 6 to be tested and the load tractor 7 are connected through a coupler 8 to form a counter-dragging structure, the variable frequency driver 4 to be tested is connected with and drives the tractor 6 to be tested, the load variable frequency driver 5 is connected with and drives the load tractor 7, and the variable frequency driver 4 to be tested and the load variable frequency driver 5 are respectively controlled by the testing controller 3; a three-phase ammeter 9 is arranged between the variable frequency driver 4 to be tested and the tractor 7 to be tested, and the variable frequency driver 4 to be tested is connected with a brake resistor 10 and a discharge resistor 11 through a contactor 15 respectively, so that the rapid discharge test of the variable frequency driver is realized, and the safety and the test efficiency can be improved. The quick connection terminals such as the contactor 15 are used for connecting the frequency conversion driver 4 to be tested, the terminals are well punched when the terminal is off line, and the connection time is shortened by quick connection in the test stage. The two ends of the load variable frequency driver 5 are connected with the energy feedback unit 12, and the energy feedback unit 12 is used for inverting and feeding the generated energy to a network. An input control contactor 13 is arranged on the input side of the variable frequency driver to be tested 4, an output control contactor 14 is arranged on the output side of the variable frequency driver to be tested, the input control contactor 13 is used for being connected with a power distribution end, and the output control contactor 14 is used for being connected with the traction machine to be tested 6. The power distribution end uses the conventional three-phase 380V alternating current and single-phase 220V power supply without a rectifying device. The test bench 1 is provided with a metal object placing surface 16, the variable frequency driver 4 to be tested is placed on the metal object placing surface 16, and the shell of the variable frequency driver is in contact with the metal object placing surface 16 to realize grounding. The test bench is electrically connected with the counter-dragging table through a cable, and is provided with a plurality of wiring terminals and electric wires 18 for butting the variable-frequency driver to be tested.
In consideration of the requirement of overheat protection of the tractor, temperature control switches of the tractor to be tested and the load tractor are respectively connected in series with enabling power supply signals of the variable-frequency driver to be tested, when the temperature of the tractor is overhigh, the normally closed contact is disconnected, the 24V enabling circuit is opened, the variable-frequency driver to be tested is stopped, and system protection is realized.
The tractor 6 to be tested and the load tractor 7 are respectively permanent magnet synchronous tractors, and the types of motors cannot be changed by voltage and voltage, so that no voltage regulator is needed; the test result is convenient to show, and the output current is used as the measuring basis, so that the test result can be visually known through the three-phase electric meter 9 or the oscilloscope, and a torque meter is not required to be equipped.
Principle of operation
1) Electric state: the testing frequency converter drives the testing tractor to work in a constant speed state (namely a rotating speed ring, for example, an elevator cannot influence the running speed by load weight change), the tractor 6 to be tested is coaxially connected with the load tractor 7, the load tractor 7 works in a power generation state to provide resistance, power generation of the load tractor is carried out through an IGBT anti-parallel diode in the load variable frequency driver 5 to lift the bus voltage, at the moment, an energy feedback unit 12 (inverter) connected with the load variable frequency driver 7 in parallel starts to work, and generated energy is inverted and fed into a network. At the moment, the knob of the load variable-frequency driver 5 is adjusted, so that the torque can be adjusted, and the output current of the variable-frequency driver 4 to be tested is further adjusted, so that the variable-frequency driver can work under any output current, and the purpose of electric testing is achieved;
2) the power generation state: the load variable-frequency driver 5 is arranged to work in an electric state, the tractor 6 to be tested is dragged reversely, the variable-frequency driver 4 to be tested works in a power generation state, the external brake resistor 10 of the variable-frequency driver 4 to be tested starts to generate heat, energy is released to stabilize bus voltage, and the purpose of power generation test is achieved;
3) when the variable frequency driver 4 to be tested is powered on, the discharge resistor 10 is disconnected; when the host to be tested is powered off, the discharge resistor 10 is switched to a direct current bus to realize rapid discharge, which can be realized by designing an interlocking logic and a main contact of a contactor;
4) phase loss control: the input and output control contactors 13 and 14 simulate the short circuit or open circuit of any phase or multiple phases, if a T-phase circuit is input, only an R phase and an S phase are input into the frequency conversion driver 4 to be tested, and at the moment, the frequency conversion driver can be used for observing whether faults are reported as expected or not by the frequency converter to be tested, and the like;
5) discharging: the discharge resistor 11 is connected to outputs "+" and "-" of the variable frequency drive 4 to be tested, i.e. the dc bus of the variable frequency drive 4 part to be tested, and the logic is interlocked with the input (U, V, W three-phase 380Vac) contactor. The principle is that when the input contactor is open (initially unpowered or open input), the discharge resistor 11 contactor contacts are closed, i.e.: and the discharge resistor 11 is connected to the positive and negative of the bus of the variable frequency driver 4 to be tested and used for discharging and storing the electricity. The same principle is that: when the input contactor is closed, the discharge resistor 11 is opened to stop the discharge. The two logics must be interlocked, otherwise, once the input contactor and the contactor of the discharge resistor 11 are closed at the same time, the discharge resistor 11 will continuously heat, because the energy is continuously supplied by the rectifier bridge inside the variable frequency driver 4 to be tested, the resistor will burn red, smoke, or even be damaged;
6) temperature control: because the variable frequency driver 4 to be tested in the test can relate to aging test, namely the variable frequency driver 4 to be tested continuously loads and runs, for example, 2 hours, at the moment, the tractor works under the full-load or heavy-load working condition, and can continuously generate heat (or an operator is not familiar with the condition or misoperation, and the tractor works under the overload mode for a long time), in order to protect the tractor, the variable frequency driver is connected in series with the temperature control switch. In order to start the operation of the variable frequency driver 4 to be tested, a 24V enabling signal must be additionally provided for the variable frequency driver 4 to be tested, the signal must be continuously supplied with power in the operation process of the variable frequency driver 4 to be tested, once the power is cut off, the frequency converter stops operating immediately, and the operation cannot be automatically recovered after the power is re-supplied, so that the enabling signal is connected in series with temperature control switches in the load tractor 7 and the tractor 6 to be tested, when the temperature of a host does not reach the protection temperature, the switch is in a closed state, the frequency converter can obtain the enabling signal to normally operate, when the temperature of the tractor is too high, the switch is disconnected, the frequency converter stops outputting immediately, and the purpose of protecting the tractor is achieved.
The above preferred embodiments should be considered as examples of the embodiments of the present application, and technical deductions, substitutions, improvements and the like similar to, similar to or based on the embodiments of the present application should be considered as the protection scope of the present patent.
Claims (7)
1. An elevator variable frequency drive test system which characterized in that: the testing platform is provided with a testing controller, a variable frequency driver to be tested, a load variable frequency driver and an energy feedback unit, the counter-dragging platform is provided with a tractor to be tested and a load tractor, the tractor to be tested and the load tractor are connected through a coupler to form a counter-dragging structure, the variable frequency driver to be tested is connected with and drives the tractor to be tested, the load variable frequency driver is connected with and drives the load tractor, and the variable frequency driver to be tested and the load variable frequency driver are respectively controlled by the testing controller; and a three-phase ammeter is arranged between the variable frequency driver to be tested and the tractor to be tested.
2. The elevator variable frequency drive test system of claim 1, wherein: and the variable frequency driver to be tested is connected with a brake resistor through a contactor.
3. The elevator variable frequency drive test system of claim 1, wherein: and the variable frequency driver to be tested is connected with a discharge resistor through a contactor.
4. The elevator variable frequency drive test system of claim 1, wherein: the test board is provided with a metal object placing surface, the variable frequency driver to be tested is placed on the metal object placing surface, and the shell of the variable frequency driver to be tested is in contact with the metal object placing surface to realize grounding.
5. The elevator variable frequency drive test system of claim 1, wherein: the input side of the variable frequency driver to be tested is provided with an input control contactor, the output side of the variable frequency driver to be tested is provided with an output control contactor, the input control contactor is used for being connected with a power distribution end, and the output control contactor is used for being connected with a traction machine to be tested.
6. The elevator variable frequency drive test system of any one of claims 1-5, wherein: the test board is electrically connected with the butt-dragging table through a cable, and is provided with a plurality of wiring terminals and electric wires for butting the variable-frequency driver to be tested.
7. The elevator variable frequency drive test system of any one of claims 1-5, wherein: and the temperature control switches of the tractor to be tested and the load tractor are respectively connected in series with the enabling power supply signal of the variable frequency driver to be tested.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120609507.2U CN215116550U (en) | 2021-03-25 | 2021-03-25 | Elevator variable frequency driver test system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120609507.2U CN215116550U (en) | 2021-03-25 | 2021-03-25 | Elevator variable frequency driver test system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112881852A (en) * | 2021-03-25 | 2021-06-01 | 广东卓梅尼技术股份有限公司 | Elevator variable frequency driver test system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112881852A (en) * | 2021-03-25 | 2021-06-01 | 广东卓梅尼技术股份有限公司 | Elevator variable frequency driver test system |
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