Is there a way to turn dc voltage from a battery to a balanced 3-phase voltage?

Question

i think there is a way to turn dc from a battery to 1-phase ac... but... is it possible to turn dc to 3-phase? i can't sleep i just have to know...

Answer 1

An inverter is a device that converts 12V DC from a battery to 120VAC, single phase. You can buy them at WalMart or auto parts stores to run things in your car from the cigarette lighter. If you put in 3 sets of the circuitry that makes the 120VAC in the inverter, you would have 3 phase power. This is rarely done because batteries generally don't have enough power to justify using 3ø AC.

I have not found any 3ø inverters, but someone may make them.

To run a 3ø electric motor off a 12VDC battery, use a 240VAC 1ø inverter, which is available up to 6000 watts. From there, there are motor drives that change 240V 1ø to 240VAC 3ø. A drive is an electronic box that controls AC motor speed and torque. 2 or 3HP drives like this are common, 5HP is rare but is made. The 3ø would surely be well balanced, but I doubt that the sine wave is very good quality.

Answer 2

In order to control the speed of a 3-phase motor, a variable frequency drive (VFD) rectifies the AC input voltage to provide a DC power supply for a 3-phase inverter circuit. The inverter circuit controls the motor speed by providing a balanced 3-phase variable frequency power source with voltage proportional to frequency. With many VFDs, it is possible to provide a DC input, but most require 300 volts or more.

In more plain words: Yes

Here is a product. Under heading "Built for Ease of Use" it says "It is possible to operate the E700 using only DC input power"

http://moxleyelectronics.com/main/produc...

There are probably also uninterruptable power supplies (UPS) and phase converters that have the function of turning dc into 3-phase buiit into them.

Answer 3

If you split the DC voltage equally between 3 oscillators whose outputs phases were 120 degrees you could achieve a 3 phase output.

  I don't know what you could do with it,but h**l it's a good question.

Answer 4

You could easily create three sine waves of equal magnitude and phase shifts. You could then step up these AC signals and run them  through an OR gate, effectively creating a 3phase AC signal (at least as an oscilloscope is concerned).  I'm sure you realize that it would be a worthless power supply.

Answer 5

give a there phase alternator excitation by ur dc voltage.u ca n get ur there phase.

or

u can rotate a dc motor by ur dc voltage and using it as a prime mover for a there phase alternator.then u get it.