help with IR2110 chips

[Alec_t]

can you help me with the new transformer 40 : 230

The turns ratio is 4 : 23, so the inductance ratio for LTspice will be the square of that, i.e. 16 : 529.

work out the max power that this circuit produces please? and the current too?

See post #717 for the power per coil. Multiply by 8. Current depends on load, which will vary with motor type and speed.

 

[Maglatron]

so I get this for 1 coil don't know how to read it!

 

[Maglatron]

correct?

 

[Maglatron]

can you tell me how to read the readings this is from the top right in the schematic below out of the 8!! I don't know how to read this!!!

 

[Maglatron]

Mr Alec_t can you perhaps explain please??!!

 

[Alec_t]

Your sim coils and voltage sources have zero resistance, so give totally unrealistic resultIs.
Ctrl+ left-click in the title of a waveform plot will give a drop-down box with average and rms values of a waveform.

 

[Maglatron]

why is it negative?? and so does that mean 95watt with the rest of the coils summed up? that is good! going to try and get a PWL file from my scope so I can simulate with an actual waveform from an actual coil!!, thanks

 

[Maglatron]

is that realistic?

 

[Maglatron]

does this look good

 

[Alec_t]

Where are nodes N002 and N005?

 

[Maglatron]

when I, alt + left click the one in the red circle it says "V(N002,N005)*I(V7)" at the top of the sim window. Also I've included the asc file of where I'm at

 

[Alec_t]

The "-" is because V7 is sourcing power.
Most of the available power is being dissipated by L1.
Now give your voltage sources and transformer coils some realistic internal resistance.

 

[Maglatron]

so if I measure the actual resistance of a coil and the resistance of the transformer windings, that would help? I can do that tonight or for definite tomorrow!

 

[Alec_t]

that would help?

Yes. Your voltage sources also have significant inductance, which should be taken into account in the sim.

 

[Maglatron]

ok I'll get the resistance's and go from there!! thanks
there anyway to calculate the inductance?? without knowing the number of turns?
I have a meter that measures capacitance not sure if it does inductance too!!

 

[Alec_t]

There are inductance calculators online.

 

[Maglatron]

ok so the power coils have a resistance of 2.5ohm each! the primary winding 230VAC side is 3.0ohm and the secondary 40VAC side resistance 0.1ohm

 

[Maglatron]

so my meter does do impedance and I found the formula L = Z/2pi * f take more readings tomorrow! where do you put the inductance in for the coils?? and I took it the the resistance is around 15% less than the impedance using those figures, the coils are 2.5ohm - inductance 9.36mH, the primary coil on transformer resistance 0.1ohm - inductance 0.376mH. secondary on transformer resistance 3ohm inductance 11.24mH, thanks

 

[Maglatron]

how do I add inductance to the power coils?

 

[Maglatron]

NOT WORKING!!!