Sensorless Control of BLDCs for All Speed Ranges with Minimal Components

2011-09-10
Dusmez, S.
Khafigh, A.
Krishnamurthy, M.
Ugur, E.
Uzunoglu, M.
Sensorless control strategies for brushless DC motors (BLDC) offer cost-effective and fault tolerant operation through replacing expensive position sensors with low-cost circuit components or taking advantage of on-board components. These drives mainly focus on two individual issues; first one is finding the initial rotor position at standstill, and the second one is driving BLDC at high speeds. Most of the studies focus on these two cases separately, proposing different circuit for each of them which adds to cost of the system. Therefore, it is desired to have control over all speed ranges including zero speed with same circuit elements if possible. This manuscript proposes a sensorless control method that combines initial position estimation by analyzing the stator core saturation and detection of zero crossings of back emf voltage by utilizing low pass filters with the same circuit topology. Results verify that a cost-effective drive can be achieved with proposed add-on resistor configuration and control method.

Suggestions

Adaptive Nonlinear Control Combined With Unscented Kalman Filter for Permanent Magnet Synchronous Motor Fed by AC/DC/AC Converter
Titaouine, A.; Taibi, D.; Bennis, O.; Benchabane, F.; Boumaraf, R.; Yahia, K. (2011-09-10)
In this paper, a adaptive non-linear controller is presented for permanent magnet synchronous motor (PMSM) sensorless drives. The adaptive non-linear controller is designed based on an input-output feedback linearization control technique. The unscented Kalman filter is used to estimate the speed, position and load torque. The PMSM is fed by an indirect power electronics converter. This indirect converter is controlled by a sliding mode technique that enables minimization of harmonics introduced by the line...
Performance Analysis, Filter Component Sizing, and Controller Structure Selection of Small Capacitor Diode Rectifier Front End Inverter Drives
Aban, V. Volkan; Hava, Ahmet Masum (2014-09-24)
In this study, the input filter design and dc-bus voltage control of ac motor drives utilizing low capacitance film capacitor are investigated. The dc-bus voltage instability problem arising due to the resonance between the dc-bus capacitor and circuit inductances is explained. A dimensioning algorithm of dc-bus filter components for stable operation is given. The simulation results of the low capacitance motor drives with and without dc-link inductor are provided to observe the stability of the dc-bus at d...
Design optimization of a fully integrated charge-pump with LC tank oscillator for ultra-low voltage energy harvesting
Jayaweera, H. M. P. C.; Muhtaroglu, Ali (2017-01-01)
Model based optimization of a novel integrated interface circuit topology is presented for low voltage DC-DC step-up conversion. A cross-coupled charge pump is implemented in standard 0.18 mu m CMOS technology using an integrated LC tank oscillator to enable a compact, low cost, self-starting solution with maximum efficiency at ultra-low input voltage levels available from embedded micro-power generators. The voltage doubling oscillator can start up with input as low as 0.10 V. Full system can step 0.2 V up...
DC Link Capacitor Optimization for Integrated Modular Motor Drives
Ugur, Mesut; Keysan, Ozan (2017-06-21)
In this paper, selection of optimum DC link capacitor for Integrated Modular Motor Drives (IMMD) is presented. First, a review of IMMD technologies is given and current research and future prospects are studied. Inverter topologies and gate drive techniques are evaluated in terms of DC link performance. The urge for volume reduction in IMMD poses a challenge for the selection of optimum DC link capacitor. DC Link capacitor types are discussed and critical aspects in selecting the DC links capacitor are list...
Output voltage control of a four-leg inverter based three-phase UPS by means of stationary frame resonant filter banks
Demirkutlu, Eyyup; Cetinkaya, Sueleyman; Hava, Ahmet Masum (2007-05-05)
A method for high performance output voltage control of a four-leg inverter (FLI) based three-phase UPS is proposed. Stationary frame resonant filter bank based output voltage control loop, which is complemented by capacitor current feedback based active damping loop, is employed. Utilizing the zero-state partitioning variable, a generalized form of scalar PWM for the FLI is developed and the minimum loss discontinuous PWM method is derived. The controller and modulator design and implementation details for...
Citation Formats
S. Dusmez, A. Khafigh, M. Krishnamurthy, E. Ugur, and M. Uzunoglu, “Sensorless Control of BLDCs for All Speed Ranges with Minimal Components,” 2011, p. 626, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/68167.