CN216016574U - Automatic integrated device for insulation monitoring of direct current injection type motor dehumidifier - Google Patents
Automatic integrated device for insulation monitoring of direct current injection type motor dehumidifier Download PDFInfo
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- CN216016574U CN216016574U CN202121590938.5U CN202121590938U CN216016574U CN 216016574 U CN216016574 U CN 216016574U CN 202121590938 U CN202121590938 U CN 202121590938U CN 216016574 U CN216016574 U CN 216016574U
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Abstract
The utility model relates to the technical field of electromechanics, and discloses an automatic integrated device for insulation monitoring of a direct current injection type motor dehumidifier, which is based on a direct current coil heating dehumidification principle and adopts a silicon controlled element to regulate and control the current; monitoring the temperature in real time; double protection of temperature and current is adopted; and a digital megohmmeter module is added to perform insulation resistance detection on the coil of the heated motor at regular time, and after the insulation resistance is detected to be qualified, the power is automatically cut off to complete dehumidification operation without monitoring in the whole process by personnel. The novel device provided by the utility model can be used for full-automatic dehumidification of the motor, improves the insulation resistance and reaches the installation and commissioning standard as soon as possible.
Description
Technical Field
The utility model relates to the technical field of electromechanics, in particular to an automatic integrated device for insulation monitoring of an injection direct current motor dehumidifier.
Background
Industrial ac motor, especially the motor which needs to be transported to engineering site by sea, causes the coil of the motor to be wet due to bad transportation and storage conditions, and can not reach the installation and operation conditions. The method for removing the moisture of the motor coil mainly comprises the following steps: ventilating, baking, and introducing low-voltage direct current to heat and dehumidify the coil. All the dehumidification methods need to be put into operation for a period of time before manual insulation detection. The need to remove the motor housing for good ventilation and baking results can affect motor quality and performance
The traditional direct current dehumidification adopts an electric welding machine for construction, the introduced direct current is not adjustable, the heating temperature is not controllable, no protective measures are provided, the monitoring and the operation of experienced electromechanical personnel are needed, and the damage of a motor coil is easily caused by slight negligence in the operation.
In addition, the dehumidification effect of the traditional method needs manual testing and confirmation of the insulation resistance, the automation degree is low, and the labor cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to: aiming at the existing problems, the automatic integrated device for insulation monitoring of the direct current injection type motor dehumidifier is provided, and the device adopts a silicon controlled element to regulate and control the current based on the principle of heating and dehumidification by introducing a direct current coil; monitoring the temperature in real time; double protection of temperature and current is adopted; a digital megohmmeter module is added to detect the insulation resistance of the coil of the electric motor at regular time; and after the insulation resistance is detected to be qualified, the power is automatically cut off, the dehumidification operation is completed, and the personnel does not need to monitor in the whole process.
The technical scheme adopted by the utility model is as follows:
an automatic integrated device for insulation monitoring of an injection direct current motor dehumidifier comprises: the device comprises a rectification module, an insulation resistance detection module, a voltage-stabilized power supply module, a temperature detection module and a main control module;
the main control module is mainly used for receiving data and controlling the rectifying module, the insulation resistance detection module and the temperature detection module, the voltage-stabilized power supply module is used for supplying power to the modules, the rectifying module is used for rectifying alternating current, the temperature detection module is mainly used for detecting the actual temperature of a motor shell, the insulation resistance detection module is mainly used for measuring the insulation resistance of a winding on a motor, and the specific structure is arranged as follows:
the temperature detection module is connected to the main control module and transmits detected temperature data to the main control module;
the rectification module is respectively connected with 220V alternating current and the main control module, and the main control module adjusts the direct current output value of the rectification module;
the main control module is connected to the insulation resistance detection module and controls the insulation resistance detection module to measure the insulation resistance;
the voltage-stabilizing power supply module is respectively connected to the rectifying module, the insulation resistance detection module and the main control module and respectively provides working power for the rectifying module, the insulation resistance detection module and the main control module.
The system further comprises a human-computer interaction module, wherein the human-computer interaction module is connected to the main control module and is used for inputting set parameters to the main control module.
Furthermore, the rectification module comprises three groups of unidirectional full-control rectifier bridges, an isolation converter and a rectification control circuit, wherein the input ends of the three groups of unidirectional full-control rectifier bridges are connected to 220V alternating current through the isolation converter, the input ends of the three groups of unidirectional full-control rectifier bridges are also connected with the voltage-stabilized power supply, and the output ends of the three groups of unidirectional full-control rectifier bridges are used as the integral output of the automatic integration device; and the main control module is connected to the three groups of unidirectional full-control rectifier bridges through the rectifier control circuit.
Furthermore, the main control module adopts a single chip microcomputer or a PLC system.
Furthermore, the temperature detection module is composed of three groups of magnetic-type thermal resistors.
The three groups of unidirectional full-control rectifier bridges are connected and controlled by the main control module; and one end of the second relay is connected to the insulation resistance detection module, the other end of the second relay is connected to the output ends of the three groups of unidirectional full-control rectifier bridges, and the second relay is controlled by the main control module in a connecting manner.
Further, the insulation resistance detection module is a digital megohmmeter.
In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:
1. the method is characterized in that the temperature is increased and the dehumidification is carried out by injecting direct current into a motor winding.
2. And a fully-controlled rectifying circuit is introduced into the dehumidifying device, so that the output direct current can be adjusted.
3. On the basis of the dehumidification mode, the insulation resistance measurement module is combined into the dehumidification device, so that the dehumidification by the injected current and the effect inspection (namely insulation resistance measurement) after the dehumidification are integrated.
4. The temperature protection and current protection function is combined into the dehumidifying device, so that the risk of damage to the motor caused by improper temperature rise of the through current is reduced.
5. The automatic control technology is combined into the dehumidifying device, so that a series of operations such as direct current injection, insulation detection and the like are automated and unmanned.
Drawings
Fig. 1 is a schematic diagram of an automatic integration device for insulation monitoring of a direct current injection type motor dehumidifier according to the present embodiment.
Fig. 2 is a wiring diagram between the automatic integration device for insulation monitoring of the direct current injection type motor dehumidifier and the motor provided by the embodiment.
Fig. 3 is a schematic working flow diagram of an automatic integration device for insulation monitoring of a direct current injection type motor dehumidifier provided by the embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. 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.
Example 1
This embodiment provides an automatic integrated device of pouring into direct current formula motor dehumidifier insulation monitoring into, this device includes: the device comprises a rectification module, an insulation resistance detection module, a man-machine interaction module, a voltage-stabilized power supply module, a temperature detection module and a main control module.
In this embodiment, the sorting module is a single chip microcomputer, and the insulation resistance detection module is a digital megohmmeter; the temperature detection module is composed of three magnetic-type thermal resistors, and the rectification module comprises three unidirectional full-control rectifier bridges, an isolation converter and a rectification control circuit.
As shown in fig. 1, the single chip microcomputer is connected with three sets of magnetic-type thermal resistors, and the thermal resistors transmit detected temperature data to the single chip microcomputer; the digital megohmmeter is connected to the singlechip, and the singlechip controls the digital megohmmeter to measure the insulation resistance of the winding of the motor to be measured; the single chip receives the set parameters input by the human-computer interaction module to control other modules to work; the input ends of the three groups of unidirectional full-control rectifier bridges are connected to 220V alternating current through an isolation converter, the stabilized voltage power supply is connected to the input ends of the three groups of unidirectional full-control rectifier bridges, and the output ends of the three groups of unidirectional full-control rectifier bridges are connected to A, B and C three-phase windings of the dehumidified resistor as the integral direct current output of the automatic integrated device; the singlechip is connected to the three groups of unidirectional full-control rectifier bridges through the rectifier control circuit; the voltage-stabilized power supply module is connected to the singlechip and the digital megohmmeter and provides a working power supply for the singlechip and the digital megohmmeter; the first relay is arranged at the output ends of the three groups of unidirectional full-control rectifier bridges and is connected and controlled by the singlechip; one end of the second relay is connected to the digital megohmmeter, the other end of the second relay is connected to the output ends of the three groups of unidirectional full-control rectifier bridges, and the second relay is connected and controlled by the single chip microcomputer.
In this embodiment, the main functions of the monolithic piece are: a. reading data of a temperature sensor and a current sensor; b. the relay is controlled to realize the switching between the detection loop and the direct current output loop; c. setting a direct current output value of the rectifying circuit; d. operating a digital megohmmeter to measure the insulation resistance; e. receiving set parameters input by a human-computer interaction device (touch screen); f. storing various data and curves in work; g. overheat and overcurrent protection functions.
The main functions of the voltage-stabilized power supply module are as follows: the DC24V working power supply is provided for a singlechip, a digital megohmmeter and the like.
The main functions of the rectifier module are: rectifying a 220V alternating current power supply into a required direct current power supply through three groups of single-phase fully-controlled rectifier bridges (thyristor elements); the rectification control circuit adjusts the output voltage by changing the phase control angle; according to ohm's law I ═ U/R (R is a large resistor connected in series in an output loop, and a voltage source is changed into a current source), different currents are adjusted; the rectification control circuit can set a proper phase control angle according to a direct current value given by the single chip microcomputer.
The main functions of the digital megohmmeter are: the digital megohmmeter is mainly used for measuring the insulation resistance of a winding; the single chip microcomputer cuts off a direct current output loop and accesses a measurement loop of the digital megohmmeter in the A, B and C windings in sequence through the first relay and the second relay according to time setting, then starts the digital megohmmeter to measure the insulation resistance, and records the measurement result; according to the measuring result, the single chip microcomputer selects to continue the through-flow dehumidification or continue the through-flow for a period of time according to the program and then stops working.
A temperature detection module: the module is adsorbed on the motor shell in a magnet adsorption mode and provides actual temperature data of the motor shell for the single chip microcomputer; for temperature protection; in addition, the singlechip can also be directly connected with temperature measuring units such as PT100 and the like which are pre-embedded in a motor winding in advance.
As shown in FIG. 2, when the device is used, the direct current output is respectively connected to the wiring terminals of the A, B and C three-phase windings of the motor, and the ground wire is connected to the shell of the motor; the thermistor is adsorbed on the surface of the motor.
The working flow of the device is shown in figure 3, and the device is immediately stopped and gives an alarm whenever the temperature or the current exceeds a stop fixed value.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The utility model provides an automatic integrated device of injection direct current motor dehumidifier insulation monitoring which characterized in that includes: the device comprises a rectification module, an insulation resistance detection module, a voltage-stabilized power supply module, a temperature detection module and a main control module;
the temperature detection module is connected to the main control module and transmits detected temperature data to the main control module;
the rectification module is respectively connected with 220V alternating current and the main control module, and the main control module adjusts the direct current output value of the rectification module;
the main control module is connected to the insulation resistance detection module and controls the insulation resistance detection module to measure the insulation resistance;
the voltage-stabilizing power supply module is respectively connected to the rectifying module, the insulation resistance detection module and the main control module and respectively provides working power for the rectifying module, the insulation resistance detection module and the main control module.
2. The automatic integration device for insulation monitoring of an injection direct current motor dehumidifier according to claim 1, further comprising a human-computer interaction module, wherein the human-computer interaction module is connected to the main control module, and the human-computer interaction module is used for inputting set parameters to the main control module.
3. The automatic integration device for insulation monitoring of the injection direct current motor dehumidifier as claimed in claim 1, wherein the rectification module comprises three sets of one-way fully-controlled rectifier bridges, an isolation converter and a rectification control circuit, wherein the input ends of the three sets of one-way fully-controlled rectifier bridges are connected to the 220V alternating current through the isolation converter, the input ends of the three sets of one-way fully-controlled rectifier bridges are further connected with the regulated power supply, and the output ends of the three sets of one-way fully-controlled rectifier bridges are used as the integral output of the automatic integration device; and the main control module is connected to the three groups of unidirectional full-control rectifier bridges through the rectifier control circuit.
4. The automatic integrated device for insulation monitoring of the injection direct current motor dehumidifier as claimed in claim 1, wherein the main control module is a single chip microcomputer or a PLC system.
5. The automatic integration device for insulation monitoring of an injection direct current motor dehumidifier according to claim 1, wherein the temperature detection module is composed of three sets of magnetic thermal resistors.
6. The automatic integration device for insulation monitoring of the injection direct current motor dehumidifier as claimed in claim 3, further comprising a first relay and a second relay, wherein the first relay is arranged at the output ends of the three sets of unidirectional full-control rectifier bridges and is connected and controlled by the main control module; and one end of the second relay is connected to the insulation resistance detection module, the other end of the second relay is connected to the output ends of the three groups of unidirectional full-control rectifier bridges, and the second relay is controlled by the main control module in a connecting manner.
7. The automatic integration device for insulation monitoring of an injection direct current motor dehumidifier according to claim 1, wherein said insulation resistance detection module is a digital megger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121590938.5U CN216016574U (en) | 2021-07-13 | 2021-07-13 | Automatic integrated device for insulation monitoring of direct current injection type motor dehumidifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121590938.5U CN216016574U (en) | 2021-07-13 | 2021-07-13 | Automatic integrated device for insulation monitoring of direct current injection type motor dehumidifier |
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| CN216016574U true CN216016574U (en) | 2022-03-11 |
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| CN202121590938.5U Active CN216016574U (en) | 2021-07-13 | 2021-07-13 | Automatic integrated device for insulation monitoring of direct current injection type motor dehumidifier |
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| CN (1) | CN216016574U (en) |
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2021
- 2021-07-13 CN CN202121590938.5U patent/CN216016574U/en active Active
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