The efficiency improvement of induction motor with constant speed for belt drive mechanism

AbstractThe noncircular synchronous belt drive mechanism has demonstrated certain achievements and has been used in special fields. Research regarding noncircular synchronous belt drive mechanisms has focused on optimization design and kinematic analysis in China, whereas two pulley noncircular synchronous belt transmissions have been developed overseas. However, owing to the noncircular characteristics of the belt pulley, the real-time variation in the belt length slack during the transmission of the noncircular synchronous belt is significant, resulting in high probabilities of skipping and vibration. In this study, a noncircular tensioning pulley is added to create a stable three-pulley noncircular synchronous belt driving mechanism and a good synchronous belt tensioning, with no skipping; hence, the non-uniform output characteristic of the driven pulley is consistent with the theoretical value. In the circular noncircular noncircular three-pulley noncircular synchronous belt mechanism, the pitch curve of the driving synchronous belt pulley is circular, whereas those of the driven synchronous belt and tensioning pulleys are noncircular. To minimize the slack of the belt length of the synchronous belt and the constraint of the concavity and circumference of the tensioning pulley, an automatic optimization model of the tensioning pulley pitch curve is established. The motion simulation, analysis, and optimization code for a three-belt-pulley noncircular synchronous belt drive mechanism is written, and the variation in belt length slack under different speed ratios is analyzed based on several examples. The testbed for a circular–noncircular–noncircular three-pulley noncircular synchronous belt transmission mechanism is developed. The test shows that the three-pulley noncircular synchronous belt drives well. This study proposes an automatic optimization algorithm for the tensioning pulley pitch curve of a noncircular synchronous belt transmission mechanism; it yields a stable transmission of the noncircular synchronous belt transmission mechanism as well as non-uniform output characteristics.

Download Full-text

Constant Speed Electrohydraulic Drive Mechanism for a Green Pea Harvester

10.4271/861196 ◽

1986 ◽

Author(s):

Douglas G. Sanderson

Keyword(s):

Constant Speed ◽

Drive Mechanism ◽

Electrohydraulic Drive ◽

Green Pea

Download Full-text

511 Development of an ultra-precision planar positioning table system with a belt drive mechanism

The Proceedings of The Manufacturing & Machine Tool Conference ◽

10.1299/jsmemmt.2006.6.153 ◽

2006 ◽

Vol 2006.6 (0) ◽

pp. 153-154

Author(s):

Hiroshi ARIMA ◽

Hayato YOSHIOKA ◽

Hidenori SHINNO

Keyword(s):

Belt Drive ◽

Drive Mechanism ◽

Ultra Precision

Download Full-text

Hybrid Anti-Windup Fuzzy PI Controller Based Direct Torque Control of Three Phase Induction Motor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.573.155 ◽

2014 ◽

Vol 573 ◽

pp. 155-160

Author(s):

A. Pandian ◽

R. Dhanasekaran

Keyword(s):

Fuzzy Logic ◽

Induction Motor ◽

Fuzzy Logic Controller ◽

Control Method ◽

Fuzzy Controller ◽

Direct Torque Control ◽

Operating Conditions ◽

Torque Control ◽

Constant Speed ◽

Three Phase

This paper presents improved Fuzzy Logic Controller (FLC) of the Direct Torque Control (DTC) of Three-Phase Induction Motor (IM) for high performance and torque control industrial drive applications. The performance of the IM using PI Controllers and general fuzzy controllers are meager level under load disturbances and transient conditions. The FLC is extended to have a less computational burden which makes it suitable for real time implementation particularly at constant speed and torque disturbance operating conditions. Hybrid control has advantage of integrating a superiority of two or more control techniques for better control performances. A fuzzy controller offers better speed responses for startup and large speed errors. If the nature of the load torque is varied, the steady state speed error of DTC based IM drive with fuzzy logic controller becomes significant. To improve the performance of the system, a new control method, Hybrid fuzzy PI control is proposed. The effectiveness of proposed method is verified by simulation based on MATLAB. The proposed Hybrid fuzzy controller has adaptive control over load toque variation and can maintain constant speed.

Download Full-text