Closed current loop regulator for electric kart DC motor torque stabilization

2011 ◽  
Author(s):  
Kristaps Vitols ◽  
Nadav Reinberg ◽  
Ilya Galkin ◽  
Alvis Sokolovs
Keyword(s):  
Dc Motor ◽  
Current Loop ◽  
Motor Torque ◽  
Closed Current

scholarly journals An Isolated Power Factor Corrected Cuk Converter with Integrated Magnetics for Brushless DC Ceiling Fan Applications

Electronics ◽  
2021 ◽  
Vol 10 (14) ◽  
pp. 1720
Author(s):  
Hashim Raza Khan ◽  
Majida Kazmi ◽  
Haris Bin Ashraf ◽  
Muhammad Hashir Bin Khalid ◽  
Abul Hasan ◽  
...  
Keyword(s):  
Low Power ◽  
Power Factor ◽  
Power Supply ◽  
Failure Modes ◽  
Torque Ripple ◽  
Current Loop ◽  
Motor Torque ◽  
Cuk Converter ◽  
Integrated Magnetics ◽  
Home Appliances

The usage of BLDC motors in the low-power range is increasing rapidly in home appliances such as ceiling fans. This has necessitated the development of reliable, compact and efficient AC-DC power supplies for motor drive circuitry. This paper presents a power supply design consisting of an AC-DC isolated PFC Cuk converter with integrated magnetics that supplies a single-shunt voltage source inverter for the sensorless drive of the BLDC fan motor. The proposed power supply design is comprised of an integrated magnetics structure in which the two inductors and the transformer windings share the same core. The zero input and output ripple current conditions have been derived from the reluctance model of the magnetic assembly. Smooth operation of the motor by minimizing the motor torque ripples is evident from the results. The Cuk converter operates in continuous conduction mode (CCM), employing the current multiplier method. The CCM-based current multiplier control loop ensures a near-unity power factor as well as low total harmonic distortion in the supply current. The current loop also provides over-current protection, enhancing reliability of the system. Moreover, the speed of the BLDC motor is controlled by the field oriented control (FOC) algorithm, which enables direct operation with alternate energy sources such as batteries and solar photovoltaic panels. The performance of the proposed supply is validated: motor torque ripple is reduced to only 2.14% while maintaining 0.999 power factor and only 4.72% THD at full load. Failure modes analysis has also been performed through software simulations, using the PLECS simulation environment. Due to the reliable power supply design with low ripples, it is well suited for low-power BLDC motors in home appliances and small power tools, in addition to ceiling fans.

Modeling and Simulation of Brushless DC Motor Speed Control System Based on MATLAB/SIMULINK

2014 ◽  
Vol 998-999 ◽  
pp. 755-758 ◽  
Author(s):  
Xue Lei Yue ◽  
Peng Bai
Keyword(s):  
Control System ◽  
Modeling And Simulation ◽  
Speed Control ◽  
Dc Motor ◽  
Brushless Dc Motor ◽  
Current Loop ◽  
Matlab Simulink ◽  
Pwm Inverter ◽  
Brushless Dc ◽  
Speed Control System

Based on analysis of the mathematical model of the brushless DC motor (BLDCM), a method for modeling and simulation of BLDCM speed control system is developed in this paper. The simulation model of BLDCM could be established by combination of the functional blocks and S-functions in MATLAB/SIMULINK. In the double loop of control system, a PID controller was adopted in the speed loop and a current controller was completed in the current loop on the principle of hysteresis current track PWM inverter. The modeling method has merits in rapidity, practicality and has guiding significance to designing actual brushless DC motor control system.

scholarly journals A physical explanation for the magnetic decrease ahead of dipolarization fronts

2015 ◽  
Vol 33 (10) ◽  
pp. 1301-1309 ◽  
Author(s):  
Z. H. Yao ◽  
J. Liu ◽  
C. J. Owen ◽  
C. Forsyth ◽  
I. J. Rae ◽  
...  
Keyword(s):  
Plasma Pressure ◽  
Current Loop ◽  
Tail Current ◽  
Dipolarization Front ◽  
Local Current ◽  
Order Of Magnitude ◽  
Closed Current ◽  
Field Aligned Current ◽  
The Cross ◽  
A Current

Abstract. Recent studies have shown that the ambient plasma in the near-Earth magnetotail can be compressed by the arrival of a dipolarization front (DF). In this paper we study the variations in the characteristics of currents flowing in this compressed region ahead of the DF, particularly the changes in the cross-tail current, using observations from the THEMIS satellites. Since we do not know whether the changes in the cross-tail current lead to a field-aligned current formation or just form a current loop in the magnetosphere, we thus use redistribution to represent these changes of local current density. We found that (1) the redistribution of the cross-tail current is a common feature preceding DFs; (2) the redistribution of cross-tail current is caused by plasma pressure gradient ahead of the DF and (3) the resultant net current redistributed by a DF is an order of magnitude smaller than the typical total current associated with a moderate substorm current wedge (SCW). Moreover, our results also suggest that the redistributed current ahead of the DF is closed by currents on the DF itself, forming a closed current loop around peaks in plasma pressure, what is traditionally referred to as a banana current.

Research on Design of BLDCM Controlling System Based on FPGA

2014 ◽  
Vol 687-691 ◽  
pp. 3120-3123
Author(s):  
Ling Yin Hu
Keyword(s):  
Control System ◽  
Real Time ◽  
Dc Motor ◽  
Low Noise ◽  
Brushless Dc Motor ◽  
Current Loop ◽  
Large Power ◽  
Brushless Dc ◽  
Time Performance ◽  
Noise Characteristics

Brushless dc motor is widely used in high electric field because of its simple structure, large power density, excellent speed regulating performance, and low noise characteristics. This paper describes a brushless DC motor real-time control system based on FPGA. The DC motor is controlled by PWM model and control model which simple the circuit; Calculating the rate of motor by determining the impulse width of n. hall sensor signal; Adopting the soft-core processor embedded in FPGA process increment PID arithmetic control, improve the system real time performance. Experimental results show that the hardware and software are reasonable, owning very good reliability and real time performance. The control system's hardware circuit was designed and implemented such as FPGA periphery circuit, drive circuit, current detecting circuit and so on. And the control arithmetic of current loop, position loop and speed loop were designed and the closed loop control of control system in hardware was achieved.

Hysteresis Current Control of a Permanent Magnet Brushless DC Motor PV Pumping System

Solar Energy ◽  
2005 ◽  
Author(s):  
A. Moussi ◽  
A. Terki ◽  
Greg Asher
Keyword(s):  
Permanent Magnet ◽  
Dc Motor ◽  
Optimal Operation ◽  
Current Control ◽  
Brushless Dc Motor ◽  
Current Loop ◽  
Brushless Dc ◽  
Pumping System ◽  
Permanent Magnet Brushless Dc ◽  
Power Point

This paper presents the optimal operation of a photovoltaic pumping system. The operation of a permanent magnet brushless DC motor driving a centrifugal pump is investigated. The motor is controlled through a hysteresis current loop and an outer speed loop with a PI type controller. The proportional and integral gains are set to their optimal values. In order to optimise the overall system efficiency, a Maximum power point tracker is also used. Simulation is carried out by formulating the mathematical model for the photovoltaic source, MPPT, motor and pump load. System performances are investigated under different levels of solar insolation. The effectiveness of the proposed controller is also demonstrated.

DC MOTOR TORQUE CONTROL USING STATE ESTIMATION

2016 ◽  
Vol 44 (3) ◽  
Author(s):  
Zanahul Farnaz ◽  
Husain S. Sajith ◽  
Anuradha D. Abeysekara ◽  
Shirantha Welikala ◽  
Prabath J. Binduhewa ◽  
...  
Keyword(s):  
State Estimation ◽  
Dc Motor ◽  
Torque Control ◽  
Motor Torque
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