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The paper proposes a simple and novel technique for driving a silicon carbide power MOSFET using silicon power MOSFET driver IC and single unipolar supply voltage. In the proposed technique, a unipolar supply voltage is given to the driver IC and split by an RC divider network for obtaining an intermediate reference point which is connected to the source terminal of the SiC MOSFET. The gate terminal...
The aim of this paper is to compare performances of brushless DC (BLDC) motor on two different inverter control strategies. Sinusoidal and square wave are individually applied to the motor and characteristics are studied. A prototype inverter fed BLDC motor drive is designed and developed. DSP dsPIC30F3011 along with MPLAB IDE software is used for generation of firing pulses for each type of inverter...
In this paper, a new robust sliding mode current controller is proposed for fourth order dc-dc converters in continuous conduction mode. The main purpose of controller is to regulate output voltage under load and input voltage variations. Advantage of proposed sliding surface is that it needs only one current sensor to sense inductor current. Converters included in this paper are zeta, cuk and single-ended...
In this paper, a large signal model of pulse-width-modulated half-bridge dc-dc converter operating in continuous conduction mode is presented. The developed model is highly nonlinear and is affected by unmatched uncertainties. This paper proposes a disturbance observer (DO) based sliding mode control to handle the matched as well as mismatched disturbances and to retain nominal performance when the...
This paper describes an application of DSP for space vector modulation technique which in turn implemented to the three phase voltage source inverter. Use of this technique provides efficient use of the DC voltage fed to the inverteras compared to other techniques. The said system is designed and developed for brushless DC motor (BLDC). dsPIC 30F3011 is used to implement the control algorithm. The...
Background Serum heparin cofactor II-thrombin complex (HCII-T) is an emerging biomarker for mucopolysaccharidosis disease (MPS I and MPS II). Methods Seventeen cases (6 MPS I and 11 MPS II) and sixty healthy controls were enrolled in study, conducted from September 2008 to December 2012. The mean ± SD age of MPS1 (n=6, 5 males) and MPS II was 7.02 ± 3.25 and 5.2 ± 2.15 years, respectively. Disease...
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