CN111562432A - Motor power measuring and calculating system based on motor refrigeration - Google Patents
Motor power measuring and calculating system based on motor refrigeration Download PDFInfo
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- CN111562432A CN111562432A CN202010527555.7A CN202010527555A CN111562432A CN 111562432 A CN111562432 A CN 111562432A CN 202010527555 A CN202010527555 A CN 202010527555A CN 111562432 A CN111562432 A CN 111562432A
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- refrigeration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/02—Arrangements for measuring electric power or power factor by thermal methods, e.g. calorimetric
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/06—Arrangements for measuring electric power or power factor by measuring current and voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
- H02K15/125—Heating or drying of machines in operational state, e.g. standstill heating
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
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Abstract
The invention relates to the technical field of motor power measurement and calculation, and particularly discloses a motor power measurement and calculation system based on motor refrigeration, which comprises an upper computer and a control panel, wherein the upper computer is electrically connected with the control panel through a data acquisition card, and the control panel is electrically connected with a signal conditioning circuit, a relay, a flow sensor, a key and an indicator light; the signal conditioning circuit is electrically connected with a voltage sensor, a current sensor and a temperature sensor, and the relay is connected with an electromagnetic valve, a water pump, a refrigeration fan and a heater; the invention measures the thermal power generated by the running of the motor by using a cooling circulation system which is necessary to be adopted when the motor runs, thereby calculating the running power of the motor; the system also has a preheating function, and can preheat the motor when the ambient temperature is too low, so that the abrasion of the motor is reduced, and the safe operation of the motor is ensured; finally, a system with low cost, strong reliability and high intelligent degree is formed.
Description
Technical Field
The invention relates to the technical field of motor power measurement and calculation, in particular to a motor power measurement and calculation system based on motor refrigeration.
Background
With the development of science and technology and the progress of times, the motor plays more and more important roles in various industries of modern society. The electric machines are widely used in the electric power industry, the mechanical manufacturing industry or other light and heavy manufacturing industry. Such as power plants, printing plants and various household appliances, are equipped with a number of electric motors. The motor has been deeply inserted into the life of people for a long time, and becomes a necessity for improving the production efficiency and the technological level and improving the life quality of people. The performance of the motor has become an important factor in measuring the stability of the control system formed by it.
The efficiency and the control system of the motor are the core links of enterprise production, and the performance of the motor is directly influenced by the quality of the power of the motor. Therefore, it is necessary to measure and calculate the efficiency of the motor and the control method thereof to determine the quality of the motor power and further evaluate the performance of the motor. In order to measure the efficiency of the motor conveniently, a motor power measuring system needs to be established. The traditional established measuring mode of the motor power measuring system for the motor power is that a rotating speed sensor and a torque sensor are installed at the output end of a motor, and then a voltage and a current are measured through a meter. The motor efficiency is calculated by the formula η ═ nT/9.55UI × 100%, and the motor power is obtained. The system for measuring the power of the motor can obtain the output power of the motor, but the torque measurement is difficult, so that all the current torque measurement modes are not economical and are limited, part of the output power is lost in the measurement process, and the output power of the motor is difficult to measure under the full working condition. Based on the current situation, a new method for measuring the power of the motor needs to be found to meet the requirements of enterprise production and technological development.
Disclosure of Invention
The invention aims to provide a motor power measuring and calculating system based on motor refrigeration, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the motor power measuring and calculating system based on motor refrigeration comprises an upper computer and a control panel, wherein the upper computer is electrically connected with the control panel through a data acquisition card, and the control panel is electrically connected with a signal conditioning circuit, a relay, a flow sensor, a key and an indicator light; the signal conditioning circuit is electrically connected with a voltage sensor, a current sensor and a temperature sensor, and the relay is connected with an electromagnetic valve, a water pump, a refrigeration fan and a heater.
Preferably, the voltage sensor and the current sensor are both connected with a motor power supply circuit, and the voltage sensor and the current sensor collect voltage and current signals and transmit the voltage and current signals to an upper computer through a signal conditioning circuit, a control panel and a data acquisition card; the voltage sensor and the current sensor collect signals and are used for calculating the output power of the motor.
Preferably, the temperature sensors are provided with two groups, namely an outlet temperature sensor and an inlet temperature sensor, which are connected in the motor cooling liquid circulation pipeline and are respectively positioned at the outlet end and the inlet end of the motor; the temperature difference before and after the cooling liquid passes through the motor can be calculated, so that the thermal power of the motor can be calculated.
Preferably, the outlet temperature sensor and the inlet temperature sensor are composed of a PT100 platinum resistor and an LM317, and the outlet temperature sensor and the inlet temperature sensor acquire temperature signals of the outlet end and the inlet end of the motor and transmit the temperature signals to the upper computer through a signal conditioning circuit, a control panel and a data acquisition card; the temperature sensor composed of the PT100 platinum resistor and the LM317 is high in precision, and the accuracy of results is guaranteed.
Preferably, the flow sensor is an FM01 water flow sensor, and the flow sensor is connected in a cooling liquid circulation pipeline of the circuit; the flow sensor collects a pipeline flow signal and transmits the pipeline flow signal to the upper computer through the control panel and the data acquisition card; and calculating the liquid flow in the pipeline and calculating the thermal power of the motor in a matching manner.
Preferably, the electromagnetic valve, the water pump and the heater are all connected in a cooling liquid circulating pipeline, a coil is arranged in the pipeline, and the refrigeration fan is arranged on the side face of the coil; the water pump provides the power for the liquid flowing in the pipeline, the solenoid valve controls the opening and closing degree of the pipeline, and the heater and the refrigeration fan respectively perform heating or refrigeration operation on the pipeline.
Preferably, the method for measuring and calculating the motor power based on the motor refrigeration comprises the following steps: the method comprises the following steps:
s1: starting equipment and a motor;
s2: the voltage sensor, the current sensor, the outlet temperature sensor, the inlet temperature sensor and the flow sensor collect data and transmit the data to the upper computer;
s3: outputting a result according to the parameters transmitted in the step S through a formula preset in the upper computer;
s4: and (4) saving the result of the step S, and drawing the image by accumulating the historical data.
Preferably, in step S, the calculation formula is:
wherein, PHeat generationThermal power is useless power, C is specific heat capacity of cooling liquid, G is current flow, T2Is the temperature of the water outlet, T1Is the inlet temperature, PTransfusion systemThe efficiency of the motor is η for the input power of the motorEfficiency of。
Compared with the prior art, the invention has the beneficial effects that: the system also has a preheating function, and can preheat the motor when the ambient temperature is too low, so that the abrasion of the motor is reduced, and the safe operation of the motor is ensured; finally, a system with low cost, strong reliability and high intelligent degree is formed.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a diagram of the preheating procedure of the present invention;
FIG. 3 is a diagram of the heat dissipation and power estimation process steps of the present invention;
reference numbers in the figures: 1. an upper computer; 2. a control panel; 3. a data acquisition card; 4. a signal conditioning circuit; 5. a relay; 6. a voltage sensor; 7. a current sensor; 8. an outlet temperature sensor; 9. an inlet temperature sensor; 10. a flow sensor; 11. an electromagnetic valve; 12. a water pump; 13. a refrigeration fan; 14. a heater; 15. pressing a key; 16. and an indicator light.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1-3, the present invention provides a technical solution: the motor power measuring and calculating system based on motor refrigeration comprises an upper computer 1 and a control panel 2, wherein the upper computer 1 is electrically connected with the control panel 2 through a data acquisition card 3, and the control panel 2 is electrically connected with a signal conditioning circuit 4, a relay 5, a flow sensor 10, a key 15 and an indicator light 16; the signal conditioning circuit 4 is electrically connected with a voltage sensor 6, a current sensor 7 and a temperature sensor, and the relay 5 is connected with an electromagnetic valve 11, a water pump 12, a refrigeration fan 13 and a heater 14.
Further, the voltage sensor 6 and the current sensor 7 are connected with a motor power supply circuit, and the voltage sensor 6 and the current sensor 7 collect voltage and current signals and transmit the voltage and current signals to the upper computer 1 through the signal conditioning circuit 4, the control board 2 and the data acquisition card 3.
Further, temperature sensor is provided with two sets ofly, is export temperature sensor 8 and entry temperature sensor 9 respectively, export temperature sensor 8 and entry temperature sensor 9 are connected in motor coolant liquid circulation pipeline, and are in the exit end and the entry end of motor respectively.
Further, the outlet temperature sensor 8 and the inlet temperature sensor 9 are composed of a PT100 platinum resistor and an LM317, and the outlet temperature sensor 8 and the inlet temperature sensor 9 collect temperature signals at the outlet end and the inlet end of the motor and transmit the temperature signals to the upper computer 1 through the signal conditioning circuit 4, the control board 2 and the data acquisition card 3.
Further, the flow sensor 10 is an FM01 water flow sensor, and the flow sensor 10 is connected in a cooling liquid circulation pipeline of the circuit; the flow sensor 10 collects a pipeline flow signal and transmits the signal to the upper computer 1 through the control panel 2 and the data acquisition card 3.
Further, the electromagnetic valve 11, the water pump 12 and the heater 14 are all connected in a cooling liquid circulation pipeline, a coil is arranged in the pipeline, and the refrigeration fan 13 is arranged on the side face of the coil.
Further, the invention also provides a measuring and calculating method of the motor power measuring and calculating system based on motor refrigeration, which comprises the following steps: the method comprises the following steps:
s1: starting equipment and a motor;
s2: the voltage sensor 6, the current sensor 7, the outlet temperature sensor 8, the inlet temperature sensor 9 and the flow sensor 10 collect data and transmit the data to the upper computer 1;
s3: outputting a result according to the parameters transmitted in the step S2 through a formula preset in the upper computer 1;
s4: the result of step S3 is saved, and the history data is accumulated and image-drawn.
Further, in step S3, the calculation formula is:
wherein, PHeat generationThermal power is useless power, C is specific heat capacity of cooling liquid, G is current flow, T2Is the temperature of the water outlet, T1Is the inlet temperature, PTransfusion systemThe efficiency of the motor is η for the input power of the motorEfficiency of。
The working principle is as follows: when the intelligent temperature control device is used, data are acquired through the voltage sensor 6, the current sensor 7, the outlet temperature sensor 8, the inlet temperature sensor 9 and the flow sensor 10 respectively, and data signals are transmitted to the upper computer 1 through the signal conditioning circuit 4, the control panel 2 and the data acquisition card 3; a formula is preset in the upper computer 1, and a result is obtained according to the formula; the results are stored and when the resulting data is sufficient, image rendering is performed for subsequent viewing.
As shown in fig. 2, a step diagram of a preheating program in the system is shown, and the operation temperature of the motor is preset; firstly, pressing a key 15 with a preheating function, and enabling a heater 14 to work; when the outlet temperature sensor 8 detects the temperature T of water2When the temperature is higher than the set operation temperature, the heater 14 stops working, and the indicator light 16 which displays the preheating completion state illuminates; then, whether to enter a refrigeration program is selected according to whether to press a key 15 with a refrigeration function; the working process of the refrigeration program is the same as the working principle of the preheating program, and further description is omitted.
FIG. 3 illustrates the steps of the heat dissipation and power estimation process of the present system; the temperature T of water is detected by a sensor by pressing a key 15 with a heat dissipation function2Temperature T of entering water1And the flow V is used for calculating the temperature difference, calculating the current heat Q and the running efficiency of the motor according to a formula, and outputting the result to a display panel to finish the heat dissipation work.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. Motor power measurement system based on motor refrigeration, its characterized in that: the device comprises an upper computer (1) and a control panel (2), wherein the upper computer (1) is electrically connected with the control panel (2) through a data acquisition card (3), and the control panel (2) is electrically connected with a signal conditioning circuit (4), a relay (5), a flow sensor (10), a key (15) and an indicator light (16); the signal conditioning circuit (4) is electrically connected with a voltage sensor (6), a current sensor (7) and a temperature sensor, and the relay (5) is connected with an electromagnetic valve (11), a water pump (12), a refrigeration fan (13) and a heater (14).
2. The motor refrigeration based motor power estimation system of claim 1, wherein: the voltage sensor (6) and the current sensor (7) are connected with a motor power supply circuit, and the voltage sensor (6) and the current sensor (7) collect voltage and current signals and transmit the voltage and current signals to the upper computer (1) through the signal conditioning circuit (4), the control panel (2) and the data acquisition card (3).
3. The motor refrigeration based motor power estimation system of claim 1, wherein: the temperature sensors are provided with two groups, namely an outlet temperature sensor (8) and an inlet temperature sensor (9), the outlet temperature sensor (8) and the inlet temperature sensor (9) are connected in a motor cooling liquid circulating pipeline and are respectively positioned at the outlet end and the inlet end of the motor.
4. The motor refrigeration based motor power estimation system of claim 3, wherein: export temperature sensor (8) and entry temperature sensor (9) comprise PT100 platinum resistance and LM317, and export temperature sensor (8) and entry temperature sensor (9) gather the temperature signal of motor exit end, entry end to transmit in host computer (1) through signal conditioning circuit (4), control panel (2), data acquisition card (3).
5. The motor refrigeration based motor power estimation system of claim 1, wherein: the flow sensor (10) is an FM01 water flow sensor, and the flow sensor (10) is connected in a cooling liquid circulating pipeline of the circuit; the flow sensor (10) collects a pipeline flow signal and transmits the signal to the upper computer (1) through the control panel (2) and the data acquisition card (3).
6. The motor refrigeration based motor power estimation system of claim 1, wherein: the electromagnetic valve (11), the water pump (12) and the heater (14) are all connected in a cooling liquid circulating pipeline, a coil is arranged in the pipeline, and the refrigeration fan (13) is arranged on the side face of the coil.
7. The measuring and calculating method of the motor power measuring and calculating system based on motor refrigeration as claimed in claims 1-6, wherein: the method comprises the following steps:
s1: starting equipment and a motor;
s2: the device comprises a voltage sensor (6), a current sensor (7), an outlet temperature sensor (8), an inlet temperature sensor (9) and a flow sensor (10), wherein the voltage sensor, the current sensor, the outlet temperature sensor and the flow sensor are used for acquiring data and transmitting the data to an upper computer (1);
s3: outputting a result according to the parameters transmitted in the step S2 through a formula preset in the upper computer (1);
s4: the result of step S3 is saved, and the history data is accumulated and image-drawn.
8. The method for evaluating a motor power evaluation system based on motor refrigeration of claim 7, wherein: in step S3, the calculation formula is:
wherein, PHeat generationThe thermal power being useless powerC is the specific heat capacity of the coolant, G is the current flow rate, T2Is the temperature of the water outlet, T1Is the inlet temperature, PTransfusion systemThe efficiency of the motor is η for the input power of the motorEfficiency of。
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| CN202010527555.7A CN111562432A (en) | 2020-06-11 | 2020-06-11 | Motor power measuring and calculating system based on motor refrigeration |
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| CN202010527555.7A CN111562432A (en) | 2020-06-11 | 2020-06-11 | Motor power measuring and calculating system based on motor refrigeration |
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Cited By (2)
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| CN116760238A (en) * | 2023-08-11 | 2023-09-15 | 大澳电器（江苏）有限公司 | Oil-cooled motor cooling system |
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Application publication date: 20200821 |
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