scholarly journals Analysis of Efficient FPGA Based Pid Controller For Dc-Dc Buck Boost Converter Using Hardware Co-Simulation Setup

2021 ◽  
Vol 4 (2) ◽  
pp. 33-39
Author(s):  
Waqar Ahmed ◽  
Shafquat Hussain ◽  
Ahmed Muddassir Khan ◽  
Rizwan Ali
Keyword(s):  
Response Time ◽  
Pid Controller ◽  
High Efficiency ◽  
Fast Response ◽  
Poor Quality ◽  
Boost Converter ◽  
Voltage Source ◽  
Compact Size ◽  
Power Stage ◽  
Low Efficiency

Converters are widely used in smart grid applications where multilevel dc voltage source are required in a system. There are few critical challenges in existing converters such as low efficiency, slow response time, large circuit size due to more number of switches subsequently poor quality of PWM signal. Moreover, a separate converter is required for each source used in the circuit. In this work, we proposed and analyse an efficient FPGA based PID controller using Hardware Co-simulation for DC-DC Buck Boost Converter. We have successfully integrated two different sources of energy which are being fed to the power stage. The control of this converter topology is implemented by using FPGA kits Virtex5 and Virtex7. Furthermore, efficiency of both kits is compared and analysed. The proposed converter has high efficiency, fast response time and compact size due to least number of switches as compared to conventional topology of such converters.

Development of High-Efficiency Zn2SiO4:Mn Thin Films for Flat Panel Cathodoluminescent Displays

1997 ◽  
Vol 471 ◽  
Author(s):  
J. Liu ◽  
D. C. Morton ◽  
M. R. Miller ◽  
Y. Li ◽  
E. W. Forsythe ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electrical Conductivity ◽  
Response Time ◽  
Decay Time ◽  
High Efficiency ◽  
Fast Response ◽  
Flat Panel ◽  
Powder Phosphor ◽  
Fast Response Time

ABSTRACTZn2SiO4:Mn thin films were deposited and studied as thin film phosphors for flat panel cathodoluminescent displays. Crystallized films with improved electrical conductivity were obtained after conventional and rapid thermal annealings in a N2 environment at 850Xy11100 °C for 0.25 to 60 minutes. A maximum cathodoluminescent efficiency of 1.3 Lm/W was achieved under dc excitation at 1500 volts. The luminescent emission from these thin films was peaked around 525 nm. The decay time of these films was controlled in the range of 2 to 10 ms by varying the deposition and annealing parameters. The fast response time of these thin films overcomes the long decay limitation of the Zn2SiO4:Mn powder phosphor in practical display applications.

Artificial muscles based on conducting polymers

e-Polymers ◽  
2003 ◽  
Vol 3 (1) ◽  
Author(s):  
María Teresa Cortés ◽  
Juan Carlos Moreno
Keyword(s):  
Conducting Polymers ◽  
Response Time ◽  
High Power ◽  
High Efficiency ◽  
Large Strain ◽  
Weight Ratio ◽  
Fast Response ◽  
Artificial Muscles ◽  
Power Weight ◽  
C 50

Abstract Natural muscles have mechanical properties that conventional actuators do not possess. These natural machines show large strain, moderate stress, high efficiency and stability, fast response time, high power/weight ratio, long lifetime, etc. In the last years a great interest has arisen to develop materials that mimic natural mechanisms. Conducting polymers have an array of potential applications as artificial muscles since they are capable to produce a moderate displacement when submitted to an electrochemical reaction. This property has been used to fabricate actuator devices that imitate and even improve the performance of natural muscles. For example, conducting polymers show stresses 15 times higher than those generated by mammalian muscles, a high power/weight ratio and a high degree of compliance. However, there are also several responses that need improvement in the actuators based on conducting polymers. Strains are still c. 50% lower than in natural muscles. Most of this kind of actuators only work in liquid media. It is necessary to increase the response time and obtain more durable actuators with longer lifetime and higher stability. In spite of these disadvantages, the first actuators based on conducting polymers are being commercialized. This paper presents a brief summary of some of the actuators based on these polymers, focusing on their design, performance and actuation mechanism.

Efficiency of High-Sensitivity Gear Trains, Such as Cycloid Drives

2013 ◽  
Vol 135 (7) ◽  
Author(s):  
Jonathon W. Sensinger
Keyword(s):  
High Efficiency ◽  
Planetary Gear ◽  
High Sensitivity ◽  
Planetary Gear Trains ◽  
Compact Size ◽  
Adjustment Factors ◽  
Tooth Number ◽  
Gear Trains ◽  
High Torque ◽  
Low Efficiency

Compact, high torque ratio, high efficiency transmissions are required in many applications, such as robotics. However, compact size and high torque ratios often come at the expense of surprisingly low efficiency. Here we apply Del Castillo's sensitivity framework (Del Castillo, J. M., 2002, “The Analytical Expression of the Efficiency of Planetary Gear Trains,” Mech. Mach. Theory, 37(2), pp. 197–214) to explain the low efficiency of a subset of transmissions that exploit small differences in tooth number between gears to generate high torque ratios. We add adjustment factors for several transmissions within this category, such as cycloids and harmonic drives; demonstrate that the models match empirical results for the case of cycloids across a range of torque ratios, topologies, and roller conditions; and compare and optimize the topologies of the various mechanisms. We demonstrate that for this subset of transmissions, the efficiency approaches a function of the torque ratio.

scholarly journals The Analysis and Design of a High Efficiency Piezoelectric Harvesting Floor with Impacting Force Mechanism

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 380
Author(s):  
Sheng-He Wang ◽  
Mi-Ching Tsai ◽  
Tsung-His Wu
Keyword(s):  
Theoretical Model ◽  
Free Vibration ◽  
High Efficiency ◽  
Electric Energy ◽  
Voltage Source ◽  
Storage Capacitor ◽  
Analysis And Design ◽  
Wireless Transmitter ◽  
Potential Development ◽  
Compact Size

In renewable energy technology development, piezoelectric material has electro-mechanical converted capability and the advantages of simple construction and compact size, it has potential development since the environment vibration can be transferred into an electrical energy in daily harvesting applications. To improve the electro-mechanical converted efficiency of a piezoelectric harvester at low-frequency environment, a free vibration type of piezoelectric cantilever harvesting structure was proposed, which can generate a resonant oscillation by releasing an initial deformed displacement, and was uninfluenced from the effects of external environment. To analyze the harvesting behaviors, an equivalent circuit with voltage source was provided, and the parameters in theoretical model can be determined by the dimensions of the piezoelectric unimorph plate and its initial deformation. From the comparison of measurement and simulation, it reveals a significant efficient theoretical model where 8% error occurrence for storage energy was found. Finally, the proposed free-vibration generation method was developed in a piezoelectric harvesting floor design, which can transfer human walking motion into electric energy, and store in an external storage capacitor. From the testing result, one time of footstep motion can cause the charging energy in a 33 μF of storage capacitor achieve to 0.278 mJ, which was larger than the driven power of the wireless transmitter module, and then the wireless transmitter can be driven to send a RF signal without external power supply. Therefore, the designed piezoelectric harvesting floor has potential development to locate the user’s current position, which can provide users with future appropriate service for intelligent building application.

scholarly journals PID Controller Based Multiple (Master/Slaves) Permanent Magnet Synchronous Motors Speed Control

2011 ◽  
Vol 11 (2) ◽  
pp. 183-192
Author(s):  
Suroor Dawood ◽  
Samar Majeed ◽  
Habeeb Nekad
Keyword(s):  
Permanent Magnet ◽  
Pid Controller ◽  
High Efficiency ◽  
Control Method ◽  
Speed Control ◽  
Industrial Applications ◽  
Voltage Source ◽  
Permanent Magnet Synchronous Motors ◽  
Synchronous Motors ◽  
Approach Method

This paper suggests the use of the traditional proportional-integral-derivative (PID) controller to control the speed of multi Permanent Magnet Synchronous Motors (PMSMs). The PMSMs are commonly used in industrial applications due to their high steady state torque, high power, high efficiency, low inertia and simple control of their drives compared to the other motors drives. In the present study a mathematical model of three phase four poles PMSM is given and simulated. The closed loop speed control for this type of motors with voltage source inverter and abc to dq blocks are designed. The multi (Master/Slaves approach) method is proposed for PMSMs. Mathwork's Matlab/Simulink software package is selected to implement this model. The simulation results have illustrated that this control method can control the multi PMSMs successfully and give better performance.

scholarly journals Study on the transient response of lower limb rehabilitation actuator using the pneumatic cylinder

2018 ◽  
Vol 9 (2) ◽  
pp. 65 ◽  
Author(s):  
Duc Mịnh Dao ◽  
Phuoc Dang Pham ◽  
Tuy Xuan Tran ◽  
Tram Thi Thuy Le
Keyword(s):  
Response Time ◽  
Lower Limb ◽  
Pid Controller ◽  
Fast Response ◽  
Pneumatic Cylinder ◽  
Drive Mechanism ◽  
Response Dynamic ◽  
Limb Rehabilitation ◽  
Starting Torque ◽  
Lower Limb Rehabilitation

A lower limb rehabilitation device was designed using the compressed air cylinder in order to answer the particular request in Vietnam. This paper is presenting the results of a study of the device response. Dynamic equation of the actuator and equations of the proportional valve have been established. The relationship between the input signal and the output signal of the actuator was derived. Inventor® software was used to design the mechanical structure of the device. Matlab® software was used to calculate the parameters values of the PID controller by simulating the response of the actuator. The results show that the response time of both knee drive and hip drive mechanisms are 8 seconds while the overshoot of both knee drive and hip drive mechanisms are 1%. Moreover, the starting torque of the knee drive mechanism is 17 Nm, and the starting torque of the hip drive mechanism is 35 Nm. The simulation results show that the PID controller gives a fast response time and a low overshoot.

Power factor correction and THD minimization in boost converter with PID controller

2021 ◽  
Author(s):  
M. Paul Jeyaraj ◽  
M. Senthil Kumar ◽  
T. Arun Prasath ◽  
S. Muthulakshmi ◽  
S. Aiswariya
Keyword(s):  
Power Factor ◽  
Pid Controller ◽  
Power Factor Correction ◽  
Boost Converter
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