Low Frequency Electronic Transformer
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- Q:An inductor has a 54.0Ohms reactance at 60.0 Hz. What willbe the maximum current if this inductor is connected to a50.0-Hz source that produces a 100-V rms voltage?
- the impedance it given to you from the formula sq. root R^2+(XC-XL)^2 which could provide you 360.40 4 ohms for this reason Z multiplies via the amp of 233mA is 80 3.98V wish this helps
- Q:An LC circuit of a 4-mH inductor and a 200μF capacitor. If the maximum energy stored in the circuit is 10?4 J, what are the maximum charge on the capacitor and the maximum current in the circuit? What are the minimum values?Can someone please explain this in detail. thanks!
- The energy of the capacitor is stored as an electric field and is maximum when its fully charged. Once fully charged the capacitor then discharge sending current through the inductor where the energy of the inductor increases as it is stored as in the magnetic field around it. So, there is an exchange of energy between to two components: L and C back and forth. Normally, resistance will will cause the amount exchanged per cycle to be reduced over time as energy is lost as resistance heating, however, the frequency remains the same. Energy of a capacitor,Ec 0.5 CV^2; However, Q CV therefore, VQ/C and V^2 Q^2/C^2 Ec 0.5 C x Q^2/C^2 Ec 0.5 Q^2/C Q^2 (2 x Ec x C) Q root(2 x Ec x C) Q 200uC E 0.5 Li^2 i^2 (2 xE)/L i^2 (2 x 10^-4)/4 x 10^-3 i^2 0.05 I 0.224A
- Q:how do u calculate the SRF of a inductor,for example i have a 90Mhz oscillator,but i need a RF choke to block the RF from entering the other part of the circuit,so the SRF of the RF choke should be more than 90Mhz may be 110Mhz.,so how can i calculate the SRF,i make inductors by myself.so please help me out.
- You cant directly calculate it, you can either get it from a datasheet of the part or you can measure it if you have a networkanalyzer and fixtures. You have to understand what the SRF really is, usually most inductors are not ideal parts, they have a inductance but also capacitance between the windings as well as package capacitance , those parasitic capacitances form a resonant circuit with the inductance , the resonance frequency of this circuit is the SRF ,if you knew the parasitic capacitance then you could calculate the SRF using thomsons equation !
- Q:i dont remember the for finding (L), i have all the info to solve it but i just need the formula. anyone know it?
- What info do you have?
- Q:I have a 9 Volt DC source in series with an inductor, and a switch. Once i close the switch, there is a spike on the screen of my oscilloscope but it is not precisely when I close the switch, a very breif moment later. The spike rapidly comes down to a steady line across the screen - indicating the dc source. Once I open the switch I get the reverse situation, the spike is in the negative and increases to the steady state.I am not truly understanding what is going on here. I connected my leads across the coil, negative to the side of the coil connected from the negative battery terminal, the positive to the other end. I am seeing the voltage drop across the coil, as the current increases is this voltage drop increasing to a maximum point then it suddenly returns to a minimum value where the voltage is source? I am soo confused .Help !!
- I suppose coil is inducter you meanthen change of its inductive reactance will determine its change in voltage.since you are having dc source voltage will not change to maximum value when current change to max reason rate of change of current is 0 then. why did you ask 3 times hhhaaahh?
- Q:I thought Inductors were used in RLC circuits, but now I see These box like things with 5 pins called 'relays' that are being used with a capacitor and a resistor for converting DC to AC.Please help.
- You are right an inductor is effectively just a coil of wire. A relay is a type of switch, which uses an electromagnet (which is also an inductor). to move the switch contacts. That way, you can use a small electric current to swich on or off a larger current. These 'relays' you speak of probably have nothing to do with traditional relays, but more like a miniature power inverter (for powering AC devices off a DC supply). They probably have a small oscillator circuit inside to produce an ac singal when they have DC power. The R and the C probably are used to set the frequency, they probably have a small integrated circuit to do most of the rest of the work. Historically, electromagnetic relays have actually been used to build inverters: an oscillator circuit can easily be built from a relay and a capacitor and resistor (it works by using the charge and discharge of the capacitor to alternately switch on and off the relay, it doesnt work like real RLC oscillator circuits). This is how flashing turning indicators work in cars by the way, the clicking sound is the relay switching on and off! This pulsating DC current is then fed into a transformer to convert the votlage to the requried level. Modern inverters use the same principle, but use transistors instead of relays.
- Q:a dc voltage source is connected to an inductor through a switch and then the switch is closed . at t 0 the inductor will behave as an open circuit . no current will flow and all the source voltage will be across the inductor. why is that? why the inductor has such behaviour. why no current can pass through the inductor at t0.
- At t0, switch closed and a potential came across the inductor. So it is like a Alternating current for a Moment. That alternating current makes inductor to behave like in AC circuit. That affects reduce continuously after t+ time because of dc voltage. There will a opposing electromagnetic field in the inductor due to sudden voltage. that will stop current to flow through the inductor
- Q:if i have coupled inductors with mutual inductance M ,how would i go about replacing them with 1 equivilant inductor and what would be its value ?
- An equivalent single X value for the two initial inductances X1and X2, having mutual inductance M, very much depends on how X1 and X2 are connected into a circuit and upon how X is to be connected. There is not a unique answer independent of circuit connection.
- Q:A resistor and an inductor are connected in a series circuit with an ac source. If the frequency of the source is increased, the current in the circuit willa)increase b)decrease c)not change
- Inductive impedance is proportional to frequency by the equation X omega L. where omega is 2 pi time frequency. So higher frequency means higher impedance and therefore lower current.
- Q:A series circuit consisting of an inductor of negligible resistance and a pure resistor of 12Ω is connected to a 30V, 50Hz AC supply. If the current is 2A, calculate: (a) the PD across the resistor (b) the PD across the inductor (c) the inductance of the inductor (d) the phase angle between applied voltage and current. (e) the impedance of the circuit
- (a) PD 2A X 12 Ohm 24 Volts (b) Z 30V/2A 15 Ohm Xl (15 Ohm) X sin(arc cos 12/15) 9 Ohm PD across inductor 2A x 9 Ohm 18 Volts (c) 9 Ohm (6.28) x (50) x inductance Inductance 9 / 314 28.7mH (d) Phase angle arc tan Xl/R arc tan 9/12 36.87 degrees (e) Impedance 30V/2A 15 Ohm
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1. Manufacturer Overview |
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| Location | Shenzhen, Guangdong, China (Mainland) |
| Year Established | 2006 |
| Annual Output Value | US$2.5 Million - US$5 Million |
| Main Markets | North America; South America; Eastern Europe; Southeast Asia; Africa; Oceania; Mid East; Eastern Asia; Western Europe; Central America; Northern Europe; Southern Europe; South Asia; Domestic Market |
| Company Certifications | CE Certificates |
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3. Manufacturer Capability |
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| a)Trade Capacity | |
| Nearest Port | Shekou,Yantian |
| Export Percentage | 51% - 60% |
| No.of Employees in Trade Department | 3-5 People |
| Language Spoken: | English, Chinese |
| b)Factory Information | |
| Factory Size: | 3,000-5,000 square meters |
| No. of Production Lines | 9 |
| Contract Manufacturing | OEM Service Offered Design Service Offered Buyer Label Offered |
| Product Price Range | Average |
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Low Frequency Electronic Transformer
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT or LC
- Min Order Qty:
- 800 Pieces pc
- Supply Capability:
- 10000 Pieces per Month pc/month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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