Hi Klaus,Hi,
It's done many million times: and audio speaker and an audio amplifer.
So why don't you use this system?
Klaus
Hi,
It's done many million times: and audio speaker and an audio amplifer.
So why don't you use this system?
Klaus
If you have better idea for the control circuit, please let me know. Thanks a lot!
The issue with class D or any AC output amplifier is their wasted power which would be reflected and not be consumed by the electromagnet perdue its enormous inductance.
Your fears are partly unfounded.
If you are worried about "enormous inductance" of the electromagnet, recall that any loudspeaker is essentially a motor and cannot move fast enough without large input of power.
If the magnet is without any load, your point is somewhat valid. But in the voicecoil of any speaker, the movement is the load (rather fast accelerations or decelerations).
If the magnetic field does no work (except perhaps producing some EM radiation), then what is the objective of the whole exercise? You need to clarify the setup. The magnetic field must see some load.
Your design should have a high coupling between the magnetic field and the target load.
For the time being, you can consider the electromagnet as a stator winding of a motor.
I do not recall seeing any snubber network even for high power speaker coils; as long as the load is well coupled, you need not worry much.
The speakers you mentioned is nothing akin to the mentioned electromagnet capable of lifting 134 pounds.
Please provide more details; voltage, current, power and, most important, your drive scheme.
Electromagnets will have far more inductive reactance to the whole audio frequency bands especially a that which can pull 134 pounds.
Your specifications do not make any sense to me.
There aren't any specifications provided other than a function generator and an electromagnet.
The benefit of class D is that they don't waste power. Almost all energy stored in the magnet will be pushed back into the power supply (which may cause problems.. of increasing the supply voltage, if not decoupled or limited)The issue with class D or any AC output amplifier is their wasted power which would be reflected and not be consumed by the electromagnet perdue its enormous inductance.
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