Distinguish between DC and AC current
Author: Nisha
Electricity is nothing but electrons moving along a conductor, like a wire that has been harnessed for energy. The difference between AC and DC has to do with the direction in which the electrons flow. In DC, electrons flow steadily in a single direction. In AC, electrons keep switching directions, sometimes going forwards and then going backwards. Scientists found that electrical and magnetic fields are related. DC power was generated from the works of Thomas Edison. Nikola Tesla preferred AC because it travels farther without losing energy and could transfer different amounts of power. AC generators gradually replaced Edison’s DC battery system because AC is safer to transfer over the longer city distances and can provide more power. Another difference between AC and DC involves the amount of energy it can carry. Each battery is designed to produce only one voltage, and that voltage of DC cannot travel very far until it begins to lose energy.
AC is more commonly the way of current produced in the power plants as it’s easier to produce. AC is usually used for transmission because DC cannot be run through a transformer, and the distribution is quite more efficient in AC. AC can provide more power easier and with higher efficiencies than DC. In the other day a battery can only produce DC. This is why portable electrical systems use DC.
In a direct current (DC) electrical circuit, the voltage (V in volts) is an expression of the available energy per unit charge which drives the electric current around a closed circuit. Increasing the resistance will proportionately decrease the current which may be driven through the circuit by the voltage.
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About the Author
Nisha is a Copywriter of electronic transformer. She written many articles in various topics.For more information visit:power transformer. contact she at malar.article@gmail.com
Is a PULSE GENERATOR the same thing as a DC MOTOR SPEED CONTROLLER?
Anyone know?! I am stumped! Thanx.
how can i regulate 12vdc to charge batteries with a 180v dc motor used as a generator (on the cheap )?
What is the best motor to use as both a motor and a generator as needed?
I’m looking for a project motor that can be used without modification as a DC Motor when power is applied, and as a generator when the rotor is spun. I understand there will need to be a controller involved. also, in my research I am finding that I need to specify that this motor should be capable of spinning up to 10k rpm.
DC motor into DC generator voltage output?
I have a 12V dc motor and wish to use it as a dc generator. Would the voltage output be smaller than 12V? How bout the current?
The type of DC motor that is easiest to use either as a motor or as a generator is a permanent magnet motor with brushes. A brushless DC motor also has permanent magnets and would work as a motor or generator, but the controller would need to be more complicated.
A series (universal) motor would only work as a generator if it retains enough residual magnitude to get started as a generator. In addition, it would require the field connection to be reversed when going from motor to generator operation.
If you need to use a motor that does not have permanent magnets, it would be best to energize the motor’s field with a power supply that does not need power from the motor.
You cannot use a transformer to do this, as you are specifying DC. You need an switching power supply. Luckily, there are many sources of DC to DC regulators that will take 180V input and give you 12V.
But they are not exactly cheap. And you probably don’t have the skills to make one, but I hope I am wrong on that assumption.
At a little over the rated speed you will get 12V at the rated current of the motor ie the current it draws on full load.
A motor speed controller is just like a volume control on your radio. A pulse generator is in simple terms , something like what is used to make your xmas lights flash, it simply opens and closes a circuit to create a “pulse”in whatever it is controlling. Vehicle speed sensors are nothing more than pulse generators made for a specific purpose.