CN212017327U

CN212017327U - Motor dehumidification device

Info

Publication number: CN212017327U
Application number: CN202020555225.4U
Authority: CN
Inventors: 钱华; 朱桂华
Original assignee: Jiangsu Xingyu Motor Co ltd
Current assignee: Jiangsu Xingyu Motor Co ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-11-27
Anticipated expiration: 2030-04-15

Abstract

A dehumidification device of a motor comprises a direct-current voltage-regulating power supply VDD and four alternating-current contactors, wherein the four alternating-current contactors are controlled by a controller, and under the control of the controller, the four alternating-current contactors enable a first output end K1 and a second output end K2, a first output end K1 and a third output end K3, and a second output end K2 and a third output end K3 to alternately output direct-current voltage. When the motor is used, the first output end K1, the second output end K2 and the third output end K3 are respectively connected with a three-phase terminal of a motor, direct current is applied to a motor winding and is not influenced by inductance of the motor winding, and lower voltage can generate larger current, so that the voltage applied to the motor winding can be smaller than a safe voltage value, electric shock accidents can be prevented, and electric sparks between windings or between turns of the windings can be avoided. The dehumidifying device of the motor is convenient to use, and the output end of the dehumidifying device can be connected to the motor wiring end as long as the wiring box of the motor is opened.

Description

Motor dehumidification device

Technical Field

The invention relates to a dehumidifying device of a motor, which is used for removing moisture in the motor.

Background

After the motor is affected with damp, the insulation performance of the winding is reduced, the winding can be used after being dried, generally, a drying method is adopted for dehumidification, the consumed time is long, and in addition, the operation is inconvenient. It is therefore necessary to provide a motor dehumidifier.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a dehumidifying device of a motor, which can quickly remove moisture in the motor and is convenient to operate.

The technical scheme of the invention is that the dehumidifying device of the motor comprises a direct current voltage regulating power supply VDD and four alternating current contactors, and is characterized in that the positive pole of the direct current voltage regulating power supply VDD is connected with a first output end K1 through a normally open contact J1 of a first alternating current contactor, the negative pole of the direct current voltage regulating power supply VDD is connected with a second output end K2 through a normally open contact J2 of a second alternating current contactor, the negative pole of the direct current voltage regulating power supply VDD is connected with a third output end K3 through a normally open contact J3 of a third alternating current contactor, the positive pole of the direct current voltage regulating power supply VDD is connected with a third output end K3 through a normally open contact J4 of a fourth alternating current contactor, the four alternating current contactors are controlled by a controller, and under the control of the controller, the first output end K1 and the second output end K2, the first output end K1 and the third output end K3, and the second output end K2 and the third output end K3.

When the motor is used, the first output end K1, the second output end K2 and the third output end K3 are respectively connected with a three-phase terminal of the motor, then the direct-current voltage-regulating power supply VDD is regulated to enable the direct-current voltage-regulating power supply VDD to have a proper voltage output, and the motor winding has current to pass through, so that the motor winding generates heat and removes moisture.

The dehumidifying device of the motor is characterized in that current is conducted in a motor winding to heat the motor winding, so that moisture of the motor winding is eliminated, and the insulation performance is recovered; the direct current is applied to the motor winding, the direct current is not influenced by the inductance of the motor winding, and the lower voltage can generate larger current, so that the voltage applied to the motor winding can be smaller than a safe voltage value, electric shock accidents can be prevented, and electric sparks between windings or between winding turns can be avoided. The dehumidifying device of the motor is convenient to use, and the output end of the dehumidifying device can be connected to the motor wiring end as long as the wiring box of the motor is opened.

The motor has the advantages that moisture in the motor can be removed quickly, and the motor is safe and convenient to operate.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

Fig. 2 is a schematic block diagram of a controller.

Fig. 3 is a schematic circuit diagram of the dc voltage power supply.

Detailed Description

The utility model provides a dehydrating unit of motor, it includes direct current voltage regulation power VDD, four ac contactor, characterized by, the positive pole of direct current voltage regulation power VDD connects first output K1 through first ac contactor's normally open contact J1, the negative pole of direct current voltage regulation power VDD connects second output K2 through second ac contactor's normally open contact J2, the negative pole of direct current voltage regulation power VDD connects third output K3 through third ac contactor's normally open contact J3, the positive pole of direct current voltage regulation power VDD connects third output K3 through fourth ac contactor's normally open contact J4.

The first output terminal K1, the second output terminal K2, and the third output terminal K3 are connected to three-phase terminals of the winding of the motor MD, respectively. The windings of the machine MD can be delta-connected or star-connected.

The four alternating current contactors are controlled by a controller, the controller comprises a single chip microcomputer, a first output end of the single chip microcomputer is connected with the first alternating current contactor through a first power amplifier, a second output end of the single chip microcomputer is connected with the second alternating current contactor through a second power amplifier, a third output end of the single chip microcomputer is connected with a third alternating current contactor through a third power amplifier, and a fourth output end of the single chip microcomputer is connected with a fourth alternating current contactor through a fourth power amplifier; the singlechip is provided with a program module, and when a program runs, the action beats of the four alternating current contactors are as follows:

firstly, only a contact J1 of a first alternating current contactor and a contact J2 of a second alternating current contactor are closed, and voltage is output between a first output end K1 and a second output end K2 and is kept for one minute;

secondly, only the contact J1 of the first alternating current contactor and the contact J3 of the third alternating current contactor are closed, and voltage is output between the first output end K1 and the third output end K3 and is kept for one minute;

thirdly, only the contact J2 of the second alternating current contactor and the contact J4 of the fourth alternating current contactor are closed, and voltage is output between the second output end K2 and the third output end K3 and is kept for one minute;

and circulating in the first step.

Under the control of the controller, the first output end K1 and the second output end K2, the first output end K1 and the third output end K3, and the second output end K2 and the third output end K3 alternately output direct current voltage, current passes through the motor windings, the heat productivity of each winding is uniform, and the purpose of removing moisture is achieved.

The direct-current voltage-regulating power supply comprises an auto-transformer BK and a rectifier QL, wherein the input end of the auto-transformer is connected with 220V mains supply through a switch DK, the output end of the auto-transformer is connected with the input end of a rectifier filter QL, the output end of the rectifier QL outputs direct-current voltage, and an ammeter A for measuring output current is installed in an output loop of the rectifier.

When the direct current voltage regulating power supply is used, the first output end K1, the second output end K2 and the third output end K3 are respectively connected with a three-phase wiring terminal of the motor, then the direct current voltage regulating power supply VDD is regulated from small to large, and the ammeter A is observed, so that the output current reaches the rated current of the motor. Because the resistance of the motor windings is small, the voltage across the motor windings will not be greater than the safe voltage (36V) when the heating current reaches the specified value. The heat is generated from the interior of the winding, so that the moisture is evaporated, and the motor winding can be dried after being electrified for about 10 minutes.

The DC voltage-regulating power supply can also adopt a silicon controlled DC voltage-regulating structure.

Claims

1. A dehumidifying device of a motor comprises a direct current voltage-regulating power supply VDD and four alternating current contactors, and is characterized in that the positive pole of the direct current voltage-regulating power supply VDD is connected with a first output end K1 through a normally open contact J1 of a first alternating current contactor, the negative pole of the direct current voltage-regulating power supply VDD is connected with a second output end K2 through a normally open contact J2 of a second alternating current contactor, the negative pole of the direct current voltage-regulating power supply VDD is connected with a third output end K3 through a normally open contact J3 of a third alternating current contactor, the positive pole of the direct current voltage-regulating power supply VDD is connected with a third output end K3 through a normally open contact J4 of a fourth alternating current contactor, the four alternating current contactors are controlled by a controller, and under the control of the controller, direct current voltage is alternately output through the first output end K1 and the second output end K2, the first output end K1 and the third output end K3, and the second output end.

2. The motor dehumidifier according to claim 1, wherein the dc voltage-regulating power source includes an autotransformer BK, a rectifier QL, an input terminal of the autotransformer is connected to a 220V commercial power through a switch DK, an output terminal of the autotransformer is connected to an input terminal of a rectifier filter QL, an output terminal of the rectifier QL outputs a dc voltage, and an ammeter a for measuring an output current is installed in an output loop of the rectifier.