Load Sharing of Dual Motor Grinding Mill Drives

Valentine, Raymond D.; Trasky, John G.; Rippin, Donald R.

doi:10.1109/tia.1977.4503382

Cited by 3 publications

(6 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To improve synchronization accuracy, early motor coordination control used the load compensation controller method to reduce the asynchronous phenomenon caused by load and torque imbalance [3]. With the continuous development of electronic technology and control theory, some control methods combined with advanced control theory have been used for multi-motor coordination control.…”

Section: Introductionmentioning

confidence: 99%

Research on a Multi-Motor Coordinated Control Strategy Based on Fuzzy Ring Network Control

Cheng

Wang

2020

IEEE Access

View full text Add to dashboard Cite

Aiming at the multi-motor coordinated control of intelligent robots, cross-coupling ring control based on fuzzy theory (CRCF) is proposed. Each motor is cross-coupled with two adjacent motors to form a multi-motor ring network structure that eliminates lag in speed tracking between motors and enhances synchronization between motors. Applying fuzzy control to the cross-coupling control of the proposed control strategy, the speed error and change in speed error of two adjacent motors are used as the input of the fuzzy controller, and its output is used as the input of the second of the two adjacent motors. The fuzzy controller achieves real-time tracking adjustment of the speed error between motors. The controllability and observability of the proposed control strategy are verified by the theorem of the Kalman matrix rank criterion. The external stability and internal stability are verified using an impulse response matrix. The theoretical analysis of the lag is verified by establishing a physical and mathematical model. Finally, a fourmotor coordination control system model is built. By comparison with the non-ring network proportional cross-coupling control method, the effectiveness of the proposed control strategy is experimentally verified by the MATLAB/Simulink and the RT-LAB real-time simulation platform. INDEX TERMS Multi-motor coordinated control, ring network control, fuzzy control, stability analysis, lag analysis.

show abstract

Section: Introductionmentioning

confidence: 99%

Research on a Multi-Motor Coordinated Control Strategy Based on Fuzzy Ring Network Control

Cheng

Wang

2020

IEEE Access

View full text Add to dashboard Cite

show abstract

“…Gearing limitations due to excessive torque on the gear-teeth of gears used in high power grinding mills led to the emergence of twin-motor drive systems [1,2]. One critical issue in twin-motor drive systems is that the two motors must rotate coordinately [3].…”

Section: Introductionmentioning

confidence: 99%

“…But the higher efficiency and power factor correcting ability of synchronous motors makes them still attractive for such drive systems, especially since twinmotor drive systems are very high power systems [4]. Such systems usually find application in mineral grinding mills and cement grinding mills [2,4]. Some efforts have been made to resolve this problem by many authors.…”

Section: Introductionmentioning

confidence: 99%

“…Some efforts have been made to resolve this problem by many authors. Most of these solutions have been observed to be either expensive [2,5], or involves a complex rotor circuit [6] or stator frame [2]. A number of patents have also been obtained which propose solution to the load share problem between two synchronous motors coupled to a common shaft [7 -10].…”

Section: Introductionmentioning

confidence: 99%

“…A number of patents have also been obtained which propose solution to the load share problem between two synchronous motors coupled to a common shaft [7 -10]. In this era of high power solid state electronics, the use of converters and load sharing regulators are other possible solutions [1,2,4] To the best knowledge of the authors, the system proposed in [9] has not been analytically studied, theoretically or experimentally. It is a two-motor drive system with a special stator winding arrangement, which also involves the series stator winding connections of the two motor units, and the two motor units drive a common load through pinions coupled to a speed reducing gear train.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis of load sharing capability of a series-connected twin synchronous motor drive coupled to a common load shaft by gearing

Onwuka

Obe

2019

Nig. J. Tech.

View full text Add to dashboard Cite

Torque limitations on gear teeth led to the use of two motors on opposite sides of the gear to drive large grinding mills. For such systems, motor overheating and rapid gear-teeth wear have been observed, especially when using synchronous motors due to load imbalance between the two motors. This paper studied a drive system consisting of two separate three-phase synchronous motors whose phase windings are split into two sections in a manner that makes them appear as six-winding machines, and then each of the resulting six windings of one motor are connected in series with those of the other motor, with no phase transposition, such that only three terminals of each motor are available to be connected to supply. The field windings are connected in parallel to the same source. Again, the motors, running on separate shafts, are connected to a common load shaft through a speed reduction gear driven through pinions. A detailed mathematical model is developed in the q-d axis, and the system is implemented on the MATLAB/SIMULINK environment. A circumferential error in the girth gear was modeled to introduce load imbalance. It is observed that despite the load imbalance, the stator currents and the load torque seen by the two motors are the same. However, a variation is observed in their rotor angles. This suggests that while the motor units inherently share the mill load equally thereby removing the possibility of motor overheating, the varying rotor angle may represent a problem for the motor shafts.

show abstract

Large Grinding Mill Drives Update

Scott

Valentine

1982

IEEE Trans. on Ind. Applicat.

View full text Add to dashboard Cite

Load Sharing of Dual Motor Grinding Mill Drives

Cited by 3 publications

References 2 publications

Research on a Multi-Motor Coordinated Control Strategy Based on Fuzzy Ring Network Control

Research on a Multi-Motor Coordinated Control Strategy Based on Fuzzy Ring Network Control

Analysis of load sharing capability of a series-connected twin synchronous motor drive coupled to a common load shaft by gearing

Large Grinding Mill Drives Update

Contact Info

Product

Resources

About