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Method and device for soft start and soft stop of multiple motors

A multi-motor, soft-stop technology, applied in the direction of motor starter, motor-generator control, reduction gear components, etc., can solve the need to temporarily insert a soft stop for another already running equipment, single function, Difficulty in installation and maintenance

Active Publication Date: 2021-09-07
浙江布科伺服科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the number of motors is large and the distance between the motors is relatively long, these methods have problems such as complicated and lengthy wiring, difficult installation and maintenance, and single functions.
Moreover, when it is necessary to temporarily change the sequence of starting or stopping, or to temporarily insert a soft stop between the soft starts of two devices, ..., etc., these existing method will not be able to achieve

Method used

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  • Method and device for soft start and soft stop of multiple motors
  • Method and device for soft start and soft stop of multiple motors
  • Method and device for soft start and soft stop of multiple motors

Examples

Experimental program
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Embodiment 1

[0065] It is known that there are 10 motors of different specifications from 15KW to 37KW in a certain workshop that need to be soft-started and soft-stopped. Now, the method of applying the technology of the present invention for operation control is described in detail.

[0066] ①. Soft starter capacity selection: Because the maximum power of the motor is 37KW, according to the instructions of the soft starter, the capacity of the soft starter should be one step larger than the power of the motor, which is 45KW.

[0067] ②. Construct operation request:

[0068] The first step is to assign a device number and a device weight to each motor: in this implementation example, each motor is assigned a device weight of 1 to 10 according to its importance in the entire system, and for simplicity, the motor's The device number is taken as the device weight of the motor;

[0069] The second step is to assign operation weights to various operations: in this implementation example, the ...

Embodiment 2

[0094] It is known that there are 12 10KW motors and 6 15KW motors in a workshop that need to implement soft start and soft stop. It is known that each soft start or soft stop takes 1 minute, and an interval of 10 seconds is required between the two operations. Complete the soft start or soft stop of all the motors within a period of time, please explain in detail the method of applying the technology of the present invention for operation control.

[0095] ①. Soft starter capacity selection: According to the known conditions, to complete the soft start or soft stop of 18 motors within 6 minutes, at least multiple motors need to be soft started or soft stopped at the same time; 12 sets of 10KW motors Divided into 3 groups of 4 units each, and at the same time divide 6 sets of 15KW motors into 2 groups, soft start or soft stop can be completed within 6 minutes after 5 times of soft start or soft stop; and the total power of 4 sets of 10KW motors is 40KW, the total power of thre...

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Abstract

The invention discloses a method and device for soft start and soft stop of multiple motors. The device comprises a soft starter control device, a soft starter, M motor control devices, M motors, a communication bus A between the soft starter control device and the soft starter, a communication bus B between the soft starter control device and the motor control device, a three-phase power line and a soft starter output three-phase power line, wherein the soft starter control device performs information interaction with the soft starter through the communication bus A; the soft starter control device performs information interaction with the M motor control devices through the communication bus B; the three-phase power line is connected to the power input end of the soft starter, and an output three-phase power line and a three-phase power line of the soft starter are connected to the power input ends of the M motor control devices respectively; and output three-phase power lines of the motor control devices are respectively connected to the corresponding motors. According to the invention, the equipment redundancy capacity is sufficiently utilized, resources are saved, and the method is simple, easy to use, low in investment, wide in application range and easy to popularize.

Description

Technical field: [0001] The invention relates to motor control technology, and also relates to centralized control technology, which is a method and device for soft start and soft stop of multiple motors. Background technique: [0002] With the rapid development of power electronics technology, soft starters are gradually being widely used. The soft starter is a novel motor control equipment integrating soft start, soft stop, light load energy saving and multi-functional protection, which fundamentally solves many disadvantages of traditional step-down starting equipment. However, the soft starter is only put into operation when the motor needs soft start or soft stop. After the motor enters normal operation, the soft starter is in an idle state, resulting in waste of resources; Starters and motors will add to the capital investment puzzle. For this reason, according to the actual needs of the project, engineers and technicians have proposed various solutions to solve the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P1/54H02P1/56H02P3/02H02P3/18
CPCH02P1/54H02P1/56H02P3/02H02P3/18
Inventor 孔繁金吴茂刚李庆松
Owner 浙江布科伺服科技有限公司
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