dc converter with capacitive output filter

... loss BDC HDC H ∆H HDC: DC magnetizing force ∆H : AC magnetizing force BDC: DC flux density ∆B : AC flux density Figure 2.4: B-H hysteresis loop Substituting (2.7) into (2.6), we have B(t) = BDC ... loop Ts Figure 2.5: Inductor current waveform The DC flux density BDC (t) and the DC magnetizing field intensity HDC (t) are given by BDC (t) = HDC (t) = NIL (t) Ac R NIL (t) lm (2.10) (2.11) The ... Current ADC Analog to Digital Converter AICS Active Input Current Shaper ASIC Application-Specific Integrated Circuit BIFRED Boost Integrated with Flyback Rectifier/Energy storage /DC- DC CCM Continuous...

Ngày tải lên: 09/09/2015, 17:53

... the dclink can be used to estimate the torque By knowing the sectors using hall-effect sensors the torque can be estimated with Ten = 2keidc, where ke is the back-EMF constant and id, is the dc- link ... load torque are applied to the BLDC motor with ideal trapezoidal back-EMF, respectively Steady-state speed control is performed with an inner-loop torque control without flux control Stator flux ... for a BLDC motor is used, as shown in Fig with straight lines Due to the sharp dips in the stator flux linkage space vector at every commutation and the tendency of the currents to match with the...

Ngày tải lên: 03/01/2014, 19:44

... reference value Therefore the converter output power must be: c _c i E[ R output voltage and load current I I So, the current reference depends on both load power and output voltage error as shown ... REFERENCES time (s) L Malesani, L Rossetto, P Tenti and P Tomasin: “ACIDCIAC PWM Converter with Reduced Energy Storage in the DC Link”, IEEE Trans on Ind Applications, vol 31, NO 2, MarcWApril 1995 ... Three-phase Power Converters”, IEEE Trans on Power Electronics, vol 13, NO 3, May 1998 pp419-426 M.-T Tsai, W I Tsai: “Analysis and design of Three-phase AC-to -DC Converters With High Power Factor...

Ngày tải lên: 03/01/2014, 19:44

... brushless dc drives with reduced torque ripple,” IEEE Trans Ind Appl., vol 41, no 2, pp 599–608, Mar./Apr 2005 [5] S B Ozturk and H A Toliyat, “Direct torque control of brushless dc motor with non-sinusoidal ... effectiveness of the sensorless three-phase conduction DTC of a BLDC motor drive with six-switch inverter The Proposed Sensorless DTC of Four-Switch BLDC Motor Drive Using Three-Phase Conduction 2.1 Principles ... Indirect Flux Control of Brushless DC Motor with Non-sinusoidal Back-EMF,” IEEE, pp 1373-1378, 2008 [8] F Bodin, S Siala, “New reference frame for brushless dc motor drive,” in Proc IEE-PEVD Annu...

Ngày tải lên: 03/01/2014, 19:45

... BLDC to the BLDC motor with actual backapplied Position Hysteresis EMF waveforms, respectively Steady-state speed control Encoder Motor Brake is performed with an inner-loop torque control without ... various cases with and without stator flux control, switch states and 2, respectively in order to demonstrate the validity of the proposed four-switch DTC of a BLDC motor drive scheme with two-phase ... in Fig with straight dotted lines However, the stator flux locus obtained in the actual implementation is shown in Fig with solid curved lines Therefore, in the four-switch DTC of a BLDC motor...

Ngày tải lên: 03/01/2014, 19:46

... systems feasible However, for videos with large variations, such as the typical videos collected from in-car cameras, the acquired images are usually noisy and with low-resolution In such scenarios, ... evaluated using benchmark data collected with the Vicon motion capturing system Section gives some discussion and concludes the paper DYNAMIC SYSTEMS AND PARTICLE FILTERS The fundamental prerequisite ... Closed-eye/non-eye: posterior for closed-eye Use logistic regression Output of logistic regression: weight of each particle Output of logistic regression: weight of each particle Posterior: open-eye...

Ngày tải lên: 22/06/2014, 19:20

... the TA output via ac-coupling capacitors so that the dc voltage at the TA output is isolated from the mixer This topology has an excellent feature of reduced 1/f noise because there is no dc current ... readily presented to the MTDSM block output without an active buffer that would isolate the high impedance of the mixer from the required low driving impedance of the output Figure shows the mechanism ... be thought of as an IIR filter with input yk and output scaled by a2 This discrete-time IIR filter operates at f0 /NM sampling rate and introduces a single pole with the frequency transfer function...

Ngày tải lên: 22/06/2014, 22:20

... with other causes of high -output failure such as profound anemia, thiamine deficiency, thyrotoxicosis and cirrhosis, the treatment is to correct the underlying cause of the highoutput state With ... to patients with other etiologies of high -output failure such as Paget's disease remains to be studied Conclusion High -output heart failure is likely under-diagnosed in patients with multiple ... aggressive resuscitory efforts and died within hours Case A 61-year-old African-American man with a history of coronary artery disease presented to his internist with com- Page of (page number not...

Ngày tải lên: 11/08/2014, 21:22

... the plasma anti-PF4/heparin antibody concentration in all patients with repeated hemofiltration -filter clotting during CVVH, with no obvious cause The purpose of this study was to report a series ... equal to 20% with a therapeutic UFH concentration and absent with a high UFH concentration Appropriate positive and negative controls (stored patient plasma) were run in parallel with plasma samples ... performed with the MedCalc® software (MedCalc Software, Mariakerke, Belgium) A P value of less than 0.05 was considered significant Results Patients' characteristics Among the 28 patients with unexplained...

Ngày tải lên: 13/08/2014, 11:22

... via the basic power converters, such as the DC- DC, AC -DC, DC- AC converters The main focus of this thesis is the analysis and design of a soft switching bi-directional DC- DC converter, including ... DC- DC converter The APHB converter with half wave rectier The voltage transfer ratio of the ideal APHB converter The modied asymmetrical PWM half bridge DC- DC converter ... Bi-directional DC- DC Converters The bi-directional DC- DC converter can act as the energy linkage between different networks which have dierent voltages and functions For example, the bi- directional converter...

Ngày tải lên: 12/09/2015, 08:20

... Survey of DC/ DC Converters 5.1 Requirements of the Selection of DC/ DC Converter Topology 5.2 Survey of DC/ DC Converter Topologies 5.2.1 Voltage-fed DC/ DC Converter Topologies ... behavior of the stack DC/ DC converters DC/ DC converter is one of the important components in a fuel cell powered system It allows us to obtain a desired level of DC voltage without having to increase ... 6.2 6.3 6.4 6.5 6.6 6.7 Voltage-fed DC/ DC Converter Topologies in Fuel Cell Systems Current-fed DC/ DC Converter Topologies in Fuel Cell Systems Z-source Converter ...

Ngày tải lên: 14/09/2015, 14:09

... A/D converter */ while(1) { PORTC &= ~ADCS; /* select A/D converter */ Output_ Control((char)0x0F); /* output control word to A/D converter */ ADresult.By_16 = Input_Data(); /* read result from converter ... BEGIN_AD bcf PORTC,ADCS ;select A/D converter movlw 0x0F call OUT_CONTROL ;load control word ;output control word call IN_DATA ;read data from A/D converter bsf PORTC,ADCS ;de-select A/D converter movlw ... “p16c62a.inc” ADCS DOUT DIN CLK equ equ equ equ 0x02 0x05 0x04 0x03 ;chip select ;serial data ;serial data ;serial data line for A/D converter out to A/D converter in from A/D converter clock to A/D converter...

Ngày tải lên: 11/01/2016, 11:33

... The output of this logic operation is called “the active-masked BEMF signal” in the following sections The active-masked BEMF signal is then filtered using the majority detection filter This filter ... developer who wants to drive a sensorless BLDC motor, using this new BLDC control technique, in a basic and simple form, without the use of discrete, low-pass filtering hardware and off-chip comparators ... the ADC module The algorithm described uses nonlinear digital filtering, based on a majority detection function to sense the back-EMF signals generated by a rotating BLDC motor Digital filtering...

Ngày tải lên: 11/01/2016, 16:47

... engine with filter heat conduction The schematic diagram of an ESE heat engine with filter heat transfer is shown in Figure It consists of two infinitely large electron reservoirs and an energy filter ... curve changes from parabolic-like one (without filter heat conduction) to a loop-shaped one (with filter heat conduction), and the optimum regions of power output and efficiency should be Pm ,h ... and hot reservoirs They interact with each other only via the energy filter which freely transmits electrons with a specified range of energies Meanwhile, the filter itself has a thermal conductivity...

Ngày tải lên: 05/09/2013, 15:28

... mạch buck converter DC- DC Giáo viên hướng dẫn: Nguyễn Duy Đỉnh 28 Thiết kế mạch buck converter DC- DC b Tải thay đổi Giáo viên hướng dẫn: Nguyễn Duy Đỉnh 29 Thiết kế mạch buck converter DC- DC Giáo ... viên hướng dẫn: Nguyễn Duy Đỉnh 25 Thiết kế mạch buck converter DC- DC Giáo viên hướng dẫn: Nguyễn Duy Đỉnh 26 Thiết kế mạch buck converter DC- DC 5.3 Quá tải 50% 5.4 Đặc tính động a Thay đổi nguồn ... Nguyễn Duy Đỉnh 23 Thiết kế mạch buck converter DC- DC Chương 5: Mô với PSIM 5.1 Định mức Giáo viên hướng dẫn: Nguyễn Duy Đỉnh 24 Thiết kế mạch buck converter DC- DC 5.2 Hở mạch Giáo viên hướng dẫn:...

Ngày tải lên: 03/01/2014, 10:16

... rectifier circuits with a unity power factor and the load current is continuous [13] Pt = 3VI = V dc I dc (3) Where, Vdc, Idc are DC side voltage and current, respectively The mean value of DC voltage ... connected to a DC battery bank via a rectifier The DC/ DC converter is connected with rectifier circuits like fig.3 It is assumed that the power generated from the generator is converted into DC power ... bat = dc (11) Rch Rdc Which Rch represent the electric load and that gives: ⎛1−α ⎞ Rdc = Rch ⎜ ⎟ ⎝ α ⎠ (12) From (7),(8) and (11), the following equation is obtained V dc 18 V = = R dc π I I dc...

Ngày tải lên: 03/01/2014, 19:15

... buck-boost converter, but the output voltage polarity is not inverted The voltage ratio is defined as: VDCout = −u (1 − u ) VDCin Where VDCin is the supply voltage, VDCout is the output voltage ... systems and autonomous grids, along with noninverting buck-boost converter or other power converter configuration as boost DC- DC converter Converter current Reference current 2.8 2.6 2.4 Current [A] ... financial aid (contract 102ни225-1/2010) REFERENCES P curve MAX P curve DC converter with LPPT at 100% P curve DC converter with LPPT at 70% [1] 1800 Power [W] 1600 Restricted condition of 70% [2]...

Ngày tải lên: 03/01/2014, 19:15

... The transistor converter comprises two power converters One is an input ac /dc converter with a power factor correction (PFC), while the other one is a dc/ dc (pulsating current) converter for driving ... switch-diode-inductance on the dc side) is described in detail in [19] and [20] The output converter is realized with asymmetric half-bridge, and i.e., dual forward converter and it consists of ... converter for driving EVA The input converter is in fact a controllable transistor rectifier with two “boost” stages and inductance on the ac side This converter with advantages over the conventional...

Ngày tải lên: 03/01/2014, 19:16

... reference signals vi: , vi: and vi; obtained above, these reference signals are normalised with , where v d is the DC output the P W M rectifier The normalised V d l G reference signals d3.i 1v d is ON ... the three-phase PWM rectifier with active filtering function explained in the preceding sections, the authors constructed a small experimental system based on Fig with parameters Referring to ... into the nonlinear load A three-phase diode bridge rectifier with a smoothing reactor on its DC side was used as the nonlinear load The DC voltage controller, harmonic current detector and AC-side...

Ngày tải lên: 03/01/2014, 19:44

... equations A Model o the converter f The structure of the converter - active filter studied in this paper is shown in Fig with its non-linear load By equalling its inverter and motor with a pure resistance, ... HARMONIC CURRENT IDENTIFICATION A periodic current with a zero dc- value i(t) of any form can (14) (15) The dc values of p and q are obtained by low pass filtering using a numerical window function: ... pollution risk is high Therefore, the ASD - Active Filter is well suited to ASD market Furthermore, with a more general approach, the ASD - Active Filter can filter any no7- linear load, and not only...

Ngày tải lên: 03/01/2014, 19:45