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Synchronous and load balancing control system for series operation of a plurality of alternating-current synchronous motors

A technology of AC synchronous motor and load balancing, which is applied in the direction of AC motor control, control system, vector control system, etc., to achieve the effect of ensuring load balance and rapidity

Inactive Publication Date: 2009-11-11
BEIJING ARITIME INTELLIGENT CONTROL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a synchronization and load balance control system in which multiple AC synchronous motors operate in series, which solves the problems of synchronization control and load balance

Method used

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  • Synchronous and load balancing control system for series operation of a plurality of alternating-current synchronous motors
  • Synchronous and load balancing control system for series operation of a plurality of alternating-current synchronous motors
  • Synchronous and load balancing control system for series operation of a plurality of alternating-current synchronous motors

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Embodiment Construction

[0013] The invention has been successfully applied in the first domestically produced large-scale hoist full-automatic, full-digital alternating frequency conversion double-machine drag system.

[0014] AC synchronous motor parameters are as follows:

[0015] Capacity: 2*3000KW

[0016] Voltage: 1500V

[0017] Current: 1212.5A

[0018] Speed: 40.2r / min

[0019] Frequency: 8.04Hz

[0020] Number of poles: 12

[0021] Overload multiple: 2 times / 1 minute

[0022] Excitation current: 323A

[0023] Excitation voltage: 267V

[0024] The torque formula of the motor is M=ψ×I. When the current is equal but the magnetic flux is not equal, the motor torque is not equal, and the problem of unbalanced load occurs. This system introduces the link of load balance control. Control block diagram such as figure 2 shown.

[0025] When the hoist is in double operation, the load balance control link monitors the torque of the two motors at all times through the actual value of the moto...

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Abstract

The invention relates to a synchronous and load balancing control system for the series operation of a plurality of alternating-current synchronous motors, belonging to the technical field of power electron and alternating-current transmission. The synchronous and load balancing control system comprises a speed sensor, a position detector, alternating-current synchronous motors, excitation control devices, transducers, pulse triggering devices, vector control systems, a load balancing control device and a synchronous combination control device and is characterized in that the alternating-current synchronous motors are all coaxially and rigidly connected in series with each other, a shaft is only provided with one position detector and one speed sensor, and the alternating-current synchronous motors are all provided with the independent vector control systems, the independent transducers, the independent excitation control devices and the independent pulse triggering devices. The invention sufficiently utilizes the rapid response characteristics of current loops of the vector control systems and ensures the load balancing and the rapidity among the plurality of coaxial and serial alternating-current synchronous motors.

Description

technical field [0001] The invention belongs to the technical field of power electronics and AC transmission, and in particular provides a synchronization and load balance control system for a plurality of AC synchronous motors running in series. Background technique [0002] In high-voltage and high-power occasions, in order to reduce the moment of inertia of mechanical equipment, speed up the transition process and reduce energy loss during the transition process, and in many super-large-capacity synchronous motor applications, because super-large-capacity synchronous motors are difficult to manufacture, multiple Coaxial series operation of two AC synchronous motors. The key to this multi-motor transmission system is to solve the problems of synchronous control and load balance. Contents of the invention [0003] The object of the present invention is to provide a synchronous and load balancing control system in which multiple AC synchronous motors operate in series, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/00H02P21/00H02P25/024
Inventor 李崇坚李向欣朱春毅何山葛钢路尚书李凡段巍周亚宁
Owner BEIJING ARITIME INTELLIGENT CONTROL
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