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-1
votes
0answers
29 views

Compensation of a single phase load [closed]

I want to design a simple single phase inductive load with a low power factor, and thereafter connect a capacitor in parallel to the circuit which will change the power factor considerably?
1
vote
2answers
110 views

What kind of inductive load does a mains LED lamp present?

This follows on from another question I'd been asking. Having been 'gifted' dozens of mains LED lamps, I've been blithely assuming that they don't offer much in the way of inductive load. But, of ...
1
vote
2answers
122 views

Tracking capable metal detector

I am starting a project up at the moment, where i need to develop a metal detector for tracking purposes. In other words, i need the ability of knowing exactly which direction the metal is being ...
4
votes
1answer
264 views

Inductive “kick” and possible dangerous experiment

So I have this unmarked, unknown transformer (probably from a microwave oven so it is pretty beefy) and I thought that a safe way to determine the primary from the secondary windings would be to put 1 ...
2
votes
1answer
115 views

Will an opening fuse cause an inductive kick, or not?

I'm looking at designing a high-current crowbar circuit. We need to blow a 1400A fuse on demand. One question that has arisen is, what about inductive kick? If you short a large capacitor through a ...
4
votes
1answer
237 views

Transfer power effectively from one coil to another through air

I want to build my own wooden alarm clock. I want the surface to be smooth without any connectors anywhere. My idea is to place one coil beneath the alarm clock, and another pickup coil inside. I ...
2
votes
1answer
2k views

How to design an RC snubber for a solenoid relay driving an inductive load?

I read up that switches driving inductive loads need to be snubbed and an RC pair seems to be the best(cheapest?) option. I have a large-ish AC induction motor (for a refrigerant compressor) that is ...
4
votes
1answer
254 views

Is it possible to have a device with metal case and wireless charging?

Recently I encountered the following idea: that a mobile device manufacturer is not interested in including wireless charging in his devices because that prohibits him from using metal cases in the ...
0
votes
0answers
557 views

What sensors are commonly used for vehicle detection?

I want to make a vehicle detection prototype. I find there are multiple choices of sensors that can be used to detect a vehicle, such as acoustic, ultrasonic, infrared, magnetic inductive sensor. I ...
7
votes
3answers
647 views

Cooper Bussmann's screw-in Edison-base mini breakers aren't for inductive loads. What does “inductive” mean?

I'm thinking of buying some Edison-base screw-in miniature circuit breakers to replace some of the fuses in my house. There are some made by Connecticut Electric and some made by Cooper Bussmann. ...
3
votes
2answers
1k views

Inductive kick-back voltage calculation

I am controlling a stepper motor (M42SP-5P) with BUZ11 MOSFETs. The winding resistances are \$22\Omega\$ and each winding is 18 mH as I measured. I am driving it with 24V, so let's say the drive ...
2
votes
1answer
664 views

Is there any difference between “induction” and “resonant” wireless energy transfer?

This article compares two systems for wireless energy transfer - one is by WiTricity and another is Bombardier PRIMOVE. I've read their descriptions thoroughly - to me they both look like resonant ...
6
votes
4answers
553 views

How is inductive wireless charging of a moving vehicle on a public road possible in efficient way?

Looks like one of the major problems of wireless energy transfer is efficiency. For example, Magne Charge high power charging system seems to have about 86% efficiency which means that quite a lot of ...
3
votes
1answer
328 views

What's the need for higher frequency in inductive charging systems?

Consider an inductive charging system like Magne Charge - it has a rather huge "coupler" coil off the vehicle and a corresponding slot on the vehicle and the coils in the "coupler" and in the slot are ...
7
votes
1answer
278 views

Why does short distance wireless energy transfer have such low efficiency?

Wikipedia and numerous other sources cite the following statement about Magne Charge high-power inductive charging system: For example, the Magne Charge system employed high-frequency induction to ...

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