CN209606581U - An energy-saving motor load test system - Google Patents

Abstract

The utility model proposes an energy-saving motor on-load test system, which includes a towing motor platform, an accompanying test frequency converter, an energy feedback unit, and a measurement and control platform. The towing motor platform includes a tested motor M1 and an accompanying test motor M2. The tested motor M1 is coaxially connected with the test motor M2, and the test frequency converter includes a frequency converter V1 connected with the test motor M1, a frequency converter V2 connected with the test motor M2, and the test motor M1 The speed control is performed by the frequency converter V1, and the accompanying test motor M2 is driven by the frequency converter V1 for torque loading control. The generated electric energy is fed back to the tested motor M1 through the inverter. The measurement and control platform includes a centralized control console and an instrument panel connected to the towed motor platform. Energy feedback is used to directly feed back the energy generated by the motor to the grid for reuse , to achieve energy-saving effect.

Description

An energy-saving motor load test system

【Technical field】

The utility model relates to the technical field of motor load experiments, in particular to an energy-saving motor on-load test system, which aims to realize the on-load test of the motor by means of a dragging type and through an energy feedback device, so as to test new motors or repaired motors. The quality of the motor is tested.

【Background technique】

The development of science and technology has put forward higher and higher requirements on the performance and quality indicators of motors. The development of motor testing technology is closely related to the development of motor industry. Motor test is an important part of comprehensive evaluation of motor assembly quality and technical performance, and an important process of motor manufacturing and production. At present, the existing motor load test platform consumes most of the load energy in other ways such as thermal resistance and water cooling system. The load device not only occupies a lot of space, but also consumes a lot of energy. Therefore, an energy-saving motor load test system is proposed.

【Content of utility model】

The purpose of this utility model is to solve the problems in the prior art, and propose an energy-saving motor on-load test system, which adopts energy feedback to directly feed back the power generated by the motor to the power grid, and reuse it to achieve energy-saving effect.

In order to achieve the above purpose, the utility model proposes an energy-saving motor on-load test system, which includes a paired motor platform, an accompanying test frequency converter, an energy feedback unit and a measurement and control platform. The said paired motor platform includes the tested motor M1, Accompanying the test motor M2, the described tested motor M1 is coaxially connected with the accompanying test motor M2, and the accompanying test frequency converter includes a frequency converter V1 connected with the tested motor M1 and a frequency converter V2 connected with the test motor M2, so The tested motor M1 is speed controlled by a frequency converter V1, and the accompanying test motor M2 is driven by a frequency converter V1 for torque loading control. The output end of the frequency converter V2 is connected to an energy feedback unit, and the energy feedback unit The electric energy sent by the test motor M2 is fed back to the tested motor M1 through the inverter, and the measurement and control platform includes a centralized control console and an instrument panel connected to the drag motor platform.

As preferably, the towed motor platform includes two groups of tested motors M1 and accompanying test motor M2, and the accompanying test frequency converter includes two groups of frequency converters V1 and frequency converter connected to the tested motor M1 and the accompanying test motor M2 in sequence V2.

As a preference, the powers of the tested motor M1 and the test companion motor M2 in each group are the same, and the test companion motor M2 is connected with a matching and corresponding rotational speed measuring device.

As a preference, the torque output of the accompanying test motor M2 is adjusted through the closed-loop control torque mode of the frequency converter V2, and the electric energy emitted by the test motor M2 is output through the frequency converter V2, and fed back to the input terminal of V1 through the energy feedback unit , and finally delivered to the tested motor M1.

Preferably, torque sensors are installed on the motor shafts connected to the tested motor M1 and the test motor M2.

As preferably, the centralized console includes: an industrial control computer for direct and variable frequency start-up and power frequency operation control of the tested motor M1, and an industrial control computer for load control of the tested motor M1; for displaying the tested motor M1 and the accompanying test motor The screen display of the real-time operation data of M2; and the high-precision quick-response analog acquisition module, PLC, and printer for the collection, storage, analysis and output of test data; the real-time operation data includes voltage, power, current, power factor , frequency, vibration, temperature data.

Preferably, the experimental instruments of the instrumentation platform include: a power meter, an oscilloscope, and a safety instrument.

Preferably, an electric control cabinet system is also included, and the electric control cabinet system includes: a power supply incoming cabinet, a motor direct starting cabinet, a motor frequency conversion starting cabinet, and a motor frequency conversion control connection cabinet, and the motor direct starting cabinet is used for 45KW and below For the full voltage start of the motor, at least three circuits should be installed in the cabinet to meet the no-load start and simultaneous operation requirements of the 45KW, 15KW and 5.5KW motors; the start and stop buttons are equipped on the cabinet to start and stop the equipment locally; the motor frequency conversion The frequency conversion start of the motor in the starter cabinet meets the requirements of the frequency conversion start and power frequency operation of the motor within 200KW; the motor frequency conversion control connection cabinet is used for the energy feedback and control between the drive cabinet and the loading cabinet during the motor loading test process.

Beneficial effects of the utility model: the utility model adopts the combination of the energy feedback device and the frequency converter to form a four-quadrant system through the cooperation of the dragging motor platform, the accompanying frequency converter, the energy feedback unit and the wind measurement and control platform. When decelerating, the DC bus voltage is too high. Under normal conditions, the DC bus voltage reaches 800V, and the inverter starts to report an overvoltage alarm. This system uses energy feedback to directly feed back the energy generated by the motor to the grid for reuse to achieve energy saving.

The features and advantages of the utility model will be described in detail through embodiments in conjunction with the accompanying drawings.

【Description of drawings】

Fig. 1 is a schematic diagram of the system principle of an energy-saving motor on-load test system of the present invention;

Fig. 2 is a configuration diagram of an energy-saving motor on-load test system of the present invention.

【Detailed ways】

Referring to Fig. 1 to Fig. 2, an energy-saving motor on-load test system of the utility model includes a paired motor platform, an accompanying test frequency converter, an energy feedback unit, and a measurement and control platform. The test motor M2, the tested motor M1 is coaxially connected with the accompanying test motor M2, the accompanying test frequency converter includes a frequency converter V1 connected with the tested motor M1, and a frequency converter V2 connected with the test motor M2, the described The tested motor M1 is speed controlled by the frequency converter V1, and the accompanying test motor M2 is driven by the frequency converter V1 for torque loading control, and the output terminal of the frequency converter V2 is connected to the energy feedback unit, and the energy feedback unit will The electric energy sent by the test motor M2 is fed back to the tested motor M1 through the inverter, and the measurement and control platform includes a centralized control console and an instrument panel connected to the towed motor platform.

Further, the towed motor platform includes two groups of tested motors M1 and accompanying test motor M2, and the accompanying test frequency converter includes two groups of frequency converters V1 and frequency converter connected to the tested motor M1 and the accompanying test motor M2 in sequence. V2; the powers of the tested motor M1 and the accompanying test motor M2 in each group are the same, and the accompanying test motor M2 is connected with a corresponding speed measuring device, and the powers of the tested motor M1 in the two groups are 160KW and 55KW respectively; The torque output of the accompanying test motor M2 is adjusted through the closed-loop control torque mode of the frequency converter V2, and the electric energy emitted by the accompanying test motor M2 is output by the frequency converter V2, fed back to the input terminal of V1 through the energy feedback unit, and finally delivered to the tested motor M1; the connected motor shafts of the tested motor M1 and the accompanying test motor M2 are installed with torque sensors.

Further, the centralized console includes: an industrial control computer for direct and variable frequency start-up and power frequency operation control of the tested motor M1, and an industrial control computer for load control of the tested motor M1; for displaying the tested motor M1 and the accompanying test motor The screen display of the real-time operation data of M2; and the high-precision quick-response analog acquisition module, PLC, and printer for the collection, storage, analysis and output of test data; the real-time operation data includes voltage, power, current, power factor , frequency, vibration, temperature data, the experimental instruments of the instrumentation platform include: power meter, oscilloscope, safety instrument.

Further, an electric control cabinet system is also included, and the electric control cabinet system includes: a power inlet cabinet, a motor direct starting cabinet, a motor frequency conversion starting cabinet, and a motor frequency conversion control connection cabinet, and the motor direct starting cabinet is used for 45KW and below For the full voltage start of the motor, at least three circuits should be installed in the cabinet to meet the no-load start and simultaneous operation requirements of the 45KW, 15KW and 5.5KW motors; the start and stop buttons are equipped on the cabinet to start and stop the equipment locally; the motor frequency conversion The frequency conversion start of the motor in the starter cabinet meets the requirements of the frequency conversion start and power frequency operation of the motor within 200KW; the motor frequency conversion control connection cabinet is used for the energy feedback and control between the drive cabinet and the loading cabinet during the motor loading test process.

The working process of the utility model:

The utility model is an energy-saving motor on-load test system, which adopts the double-motor dragging mode, checks the relevant data indicators of the motor performance, and effectively analyzes and evaluates the actual performance indicators of the motor. Control, the loading end adopts the speed closed-loop vector control, the torque is given, and the tested motor is loaded, and the technical indicators related to the tested motor are verified after loading. The electric energy sent by the test motor is fed back to the tested motor through the inverter. Such recycling and repeated use reduces the energy that the system draws from the grid. Among them, the system adopts the combination of energy feedback device and frequency converter to form a four-quadrant system. The purpose is that when the frequency converter decelerates, the DC bus voltage is too high. Under normal conditions, the DC bus voltage reaches 800V, and the frequency converter starts to report an overvoltage alarm. , the system uses energy feedback to directly feed back the energy generated by the motor to the grid for reuse, thereby achieving energy-saving effects.

The above-mentioned embodiment is an illustration of the utility model, not a limitation of the utility model, and any scheme after a simple transformation of the utility model belongs to the protection scope of the utility model.

Claims (8)

1. An energy-saving motor on-load test system is characterized in that: it includes a paired motor platform, an accompanying test frequency converter, an energy feedback unit and a measurement and control platform, and the described paired motor platform includes a tested motor M1 and an accompanying test motor M2 , the tested motor M1 is coaxially connected with the test motor M2, the test frequency converter includes a frequency converter V1 connected with the test motor M1, and a frequency converter V2 connected with the test motor M2, and the test motor M1 is controlled by the frequency converter V1, and the accompanying test motor M2 is driven by the frequency converter V1 for torque loading control. The electric energy generated by M2 is fed back to the tested motor M1 through the inverter, and the measurement and control platform includes a centralized control console and an instrument panel connected to the dragged motor platform. 2. An energy-saving motor on-load test system as claimed in claim 1, characterized in that: said towed motor platform includes two groups of tested motors M1 and accompanying test motor M2, and said accompanying test inverter includes two Group the frequency converter V1 and frequency converter V2 connected with the tested motor M1 and the accompanying test motor M2 in turn. 3. A kind of energy-saving motor load test system as claimed in claim 2, characterized in that: the power of each group of the tested motor M1 and the accompanying test motor M2 is the same, and the accompanying test motor M2 is connected with a matching corresponding speed measuring device. 4. A kind of energy-saving motor on-load test system as claimed in claim 1, characterized in that: the torque output of the accompanying test motor M2 is adjusted through the V2 closed-loop control torque mode of the frequency converter, and the accompanying test motor The electric energy generated by M2 is output by the frequency converter V2, fed back to the input terminal of V1 through the energy feedback unit, and finally delivered to the tested motor M1. 5. An energy-saving motor on-load test system according to any one of claims 1-4, characterized in that torque sensors are installed on the connected motor shafts of the tested motor M1 and the accompanying motor M2. 6. A kind of energy-saving motor load test system as claimed in claim 1, characterized in that: said centralized console includes: used for direct and variable frequency start and power frequency operation control of the tested motor M1, tested Industrial control computer for motor M1 load control; screen display for displaying real-time operating data of the tested motor M1 and accompanying test motor M2; and high-precision and fast-response analog acquisition for test data collection, storage, analysis and output Module, PLC, printer; the real-time operation data includes voltage, power, current, power factor, frequency, vibration, temperature data. 7. An energy-saving motor on-load test system according to claim 1, characterized in that: the test instruments on the instrument panel include: a power meter, an oscilloscope, and a safety gauge. 8. A kind of energy-saving type motor on-load test system as claimed in claim 1, is characterized in that: also comprises electric control cabinet system, and described electric control cabinet system comprises: power supply incoming line cabinet, motor direct starting cabinet, motor frequency conversion Starter cabinet, motor frequency conversion control connection cabinet, the motor direct starter cabinet is used for full-voltage start of motors of 45KW and below, and at least three circuits should be installed in the cabinet to meet the no-load start and simultaneous operation requirements of 45KW, 15kw and 5.5KW motors respectively , the start-stop button is arranged on the cabinet body; the frequency conversion start of the motor in the motor frequency conversion starter cabinet meets the requirements of frequency conversion start and power frequency operation of the motor within 200KW; the motor frequency conversion control connection cabinet is used in the motor loading test process, and the drive cabinet Energy feedback and control with the loading cabinet.