The CSC converter used in the proposed BLDC drive system operating in DICM. In DICM the inductor current becomes discontinuous in a switching period. The CSC converter have three modes of operation. These are explained as follows: Mode 1: In this mode the CSC converter is in ON position, then the inductor current charges the input current and the capacitor C1 discharges the energy to the dc link capacitor, the DC link capacitor is charging as well as supplies energy to the load. Mode 2: Here the CSC converter is in off position, the inductor L1 discharges the stored energy to the DC link capacitor through diode D. Mode 3: The diode D becomes reverse biased when the inductor is going to be zero, the capacitor C1 is continuous to charging, then …show more content…
DESIGN AND CONTROL OF CSC CONVERTER The CSC converter is similar to the Cuk converter. The CSC converter includes a switch, diode and a capacitor. It is used for the design of various DC -DC converters [4-5]. Fig. 2. shows a CSC converter. In this the voltage at the output if DBR is given as, 〖 V〗_(i )=(2√(2 ))/π V_s where V_s is the the supply voltage. (1) Duty ratio of the converter is given as, D =V_dc/(V_i+ V_dc ) where V_dc is the dc link voltage. (2) Fig. 2. CSC …show more content…
The BLDC motor is driven by a three phase inverter in which the devices are triggered with respect to the rotor position as shown in Fig. 3. The phase A terminal voltage with respect to star point of the stator V_an is given as, V_an =R_(a ) i_a +L_a d_ia/dt +e_an (10) where R_(a ) is the stator resistance, L_a is the phase inductance,e_an is the back emf,i_a is the phase current of the "A" phase. Similar equations can be written for the other two phases as V_bn =R_(b ) i_b +L_b d_ib/dt +e_bn (11) 〖 V〗_cn =R_(c ) i_c +L_c d_ic/dt +e_cn (12) From above equations, the line voltage V_ab can be determined as, V_ab =V_an- V_bn = R(i_a-i_b)+ L (d(i_(a-) i_(b)))/dt +e_an - e_bn Similarly, V_bc =V_bn- V_cn = R(i_b-i_c)+ L (d(i_(b-) i_(c)))/dt +e_bn - e_cn V_ca =V_cn- V_an = R(i_c-i_a)+ L (d(i_(c-) i_(a)))/dt +e_cn - e_an subtracting V_bc from V_ab gives, V_abbc = V_ab- V_bc =R(i_(a )- 2i_(b )+ i_(c )) + L(d(i_(a-) 2i_(b+) i_(c)))/dt
Muller, S., Prowse, D. L., & Soper, M. E. (2012, September 25). CompTIA A+ Cert Guide: Power Supplies and System Cooling | Foundation Topics | Pearson IT Certification. Retrieved March 20, 2014, from http://www.pearsonitcertification.com/articles/article.aspx?p=1945640
It was also possible to simulate ED system after the electric resistances of the equivalent circuit were obtained from the analysis of the time course of PaCl. The simulation results agreed with ED data very well.
The cash realization cycle or the cash conversion cycle (CCC) measures the capital efficiency of a company. The efficiency is measured in the number of days it takes to convert the company’s activities which require cash back into cash (Morrow, 2012, page 1). In other words, it is the time it takes to convert from paying the expenses into receiving payment from customers (Morrow, 2012, page 1). It measures the time, in days, needed to sell the inventory and collect the payment.
Third Stage[t2-t3](Fig.9): At instant t2 The switch is turned off at the time t2. energy stored in L1 transfer to the Capacitor CM and also energy transfer through capacitor CS1 and CS2
Since the beginning of the Civil Rights Movement in the mid-nineteenth century, African American leaders have proposed many different theories and methods to address the injustices posed by the white majority on to the African-American population. One point that all the leaders agreed on, however, was that things had to change, the injustice and discrimination that the black community faced couldn’t be tolerated anymore. The most well known of these leaders was Martin Luther King who amongst others started one of the most prominent civil rights groups in the struggle for African American rights in the sixties: The Southern Christian Leadership Conference. Founded by college students, the Student Nonviolent Coordinating
Keefer, D. M. (2009, September 3). The Canadian Charger. Retrieved May 15, 2014, from The Canadian Charger: http://www.thecanadiancharger.com/page.php?id=5&a=115
The C Series models are the 110-seat CS100 and the 135-seat CS300. These were initially named C110 and C130, respectively. In certification documentation, the C Series family is designated Bombardier BD-500, with suffix
Determining the Approximate Equivalent Circuit of a Single-Phase Transformer AIM --- To determine the approximate equivalent circuit of a single-phase transformer. OBJECTIVE --------- To write up a lab report that will determine the equivalent circuit of a single-phase transformer, using open load test, short circuit test and the load test. EQUIPMENT --------- · TecQuipment electrical machines teaching unit NE8010 or NE8013
This involves relating the current supplied to the motor, motor shaft rotational speed, motor efficiency, and the power factor as a function of the load of the motor, similar to the figure on page 21 of the Lab Manual.
The exact workings of different brushless DC motors depend on the type of timing device used. This example uses a Reed switch.
I am writing this essay to explain to you what is going on in the circuit that was given to me. I will explain with the best of my knowledge so that you can fully understand what is happening in the circuit. The inductor and the wires are assumed as being ideal. The AC voltage source has an infinitely variable frequency (0≤f≤∞). The values of all the resistors, capacitor, and inductor are constant.
In this paper, I will talk about how AC circuits can be described by considering voltage and current using complex numbers. An AC circuit requires two separate numbers to be able to completely describe it. This is because it takes into account the amplitude and the phase of the current. The fact that complex numbers can be easily added, subtracted, multiplied or divided with each other makes them ideal for this operation where both amplitude and phase have to work together.
-In order to solve this differential equation you look at it till a solution occurs to you.
Alternating current is always changing in direction and amplitude. The current flow in alternating current changes in even intervals. Ac usually changes in power and direction. The vast majority of power supplied for households and big business is alternating current. This is because of the ease of generating alternating current in alternators. The main concept of alternators is moving a conductor through magnetic lines. The change in the magnetic field around the conductor or vice versa makes electrons move. When you have physically moved either the conductor or magnet in a complete 306-degree circle you have produced one sine wave or one complete cycle. The amount of time it takes to complete one cycle is referred to as a period. The frequency of an alternating sine wave is the amount of cycles per second. Frequency is measured in hertz. One hertz is equivalent to one cycle per second. The frequency coming out of your electrical plug at home is 60 Hz. The peak value in a sine wave is the top voltage level away from zero. The peak-to-peak voltage value is referring to difference between the positive peaks value to the negative peak value. The effective or rms value of a sine wave is the actual amount you would use or measure using a multi-meter. In three-phase alternating current there are three different coils or conductors that produce three different sine waves.
...he linear variation of force constants with concentration in this compound suggests that this compound exhibits one mode behavior for 0 ≤ x ≤ 0.2.