Motor protector dual-machine linkage method and linkage device

A linkage device and protector technology, which is applied to emergency protection circuit devices, control multiple AC motors, electrical components, etc., can solve problems such as production line failures and asynchronous operation of two counter-rotating motors, and achieve accurate action time and solve problems. Production line failure, good repeatability effect

Inactive Publication Date: 2010-06-16
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Technical problem: The present invention aims at the stalling problem of double counter-rotating motors, and provides a motor protector double-machine linkage method and device, which can realize that when one motor is blocked a

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  • Motor protector dual-machine linkage method and linkage device
  • Motor protector dual-machine linkage method and linkage device
  • Motor protector dual-machine linkage method and linkage device

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Embodiment Construction

[0012] The method and device of the present invention will be further described below with reference to the drawings and specific embodiments.

[0013] Such as figure 1 As shown, a production line uses dual counter-rotating motors A and B, each motor is a 380V three-phase asynchronous motor, the power supply frequency is 50Hz, and the motor uses star connection. An air switch, an AC contactor, and the method and device of the present invention are used in the electrical control system to perform dual-machine linkage and locked-rotor protection. Protector A and protector B correspond to motor A and motor B respectively. figure 2 In the wiring shown, the protector A and protector B are connected by a serial port. The overall structure is like image 3 Shown.

[0014] Such as figure 2 As shown, a dual-machine linkage device for a motor protector is characterized in that: one motor is equipped with a linkage device, the two linkage devices have the same structure, and each linkage ...

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Abstract

The invention discloses a motor protector double-machine linkage method and a linkage device. The method comprises the following steps of: using a current sampling circuit to separately detect the current of the protected motor, and outputting the sampling current to a single chip machine by a protector; when the single chip machine judges that the motor is abnormal according to the sampling unit, driving a relay control circuit to stop or reversely rotate the motor, and simultaneously sending a synchronous control signal to the other motor linkage device to stop or reversely rotate the othermotor through a serial driving chip; when the abnormality does not occur, driving the relay control circuit to start the motor or not actuate, and simultaneously sending a synchronous control signal to the other motor linkage device to start the other motor or not actuate through the serial driving chip. The linkage device consists of a processor, a current sampling circuit, a serial chip, a relay control circuit, a secondary control loop, a switch power supply and wiring terminals. The invention has high setting precision, accurate actuation time and stable synchronism.

Description

Technical field [0001] The invention is applied in the field of control and protection of dual counter-rotating motors, and can realize that when one motor is blocked and needs to be stopped or even reversed, the other motor also operates synchronously, thereby solving the problem of industrial production enterprises due to the dual The production line failure caused by the unsynchronized operation of rotating motors belongs to the field of electric automation control of double counter rotating motors. Background technique [0002] Dual counter-rotating motors are generally used in mines, coal washing plants and other occasions where minerals need to be crushed. The main structure of this counter-rotation form is composed of two electric motors, which drive two spur shafts close together to rotate in opposite directions, thereby crushing the minerals. Due to the different hardness, size and weight of minerals, some mineral blocks are not easy to be crushed, and even get stuck be...

Claims

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Application Information

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IPC IPC(8): H02P5/74H02H7/08
Inventor 钟锐于阳刁龙桑爱兵陆生礼时龙兴李冰
Owner SOUTHEAST UNIV
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