I want to know vd/vq voltage scaling factor & real voltage value!

byunghun moon

I found from other question that Base current is 10A, Base voltage is 236.6(DC bus/sqrt(3)) in latest version of TMDSHVMTRPFCKIT(v2.1).

( DC bus = 410 )

But in my kit, real DC bus is 300V, measured by multi-meter. In that case, my Base voltage is what? 410/sqrt(3) or 300/sqrt(3) ?

In HVPM_Sensored_servo.c, PU(per unit) is used. (-1 < park1.Qs < 1 )

I think that park1.Qs * Base current(10) is real Iq value. Is it right?

And I want to know real voltage value.

In PMSM, Current PI_MACRO output is the Vq value.

ipark1.Qs = pi_iq.out ;

If I want to know real Vq value, pi_iq.out * Base voltage is real value of Vq ?

or pi_iq.out * Base voltage*Base current?

plz answer my question!

over 8 years ago

0 byunghun moon over 8 years ago

Intellectual 360 points

for example, if motor speed is constant(=1000rpm), then pmsm mathematical model will be vd = -wr*Lq*Iq. ( Because Id = 0 )

In that case, I want to know vq(=pi_id.out) real value to calculate Lq parameter!

i know real value wr = 418.6(rad/s), Iq = park1.Qs*Base current(10A). ( pole pair = 4)

plz anser my question!

0 Yanming Luo over 8 years ago in reply to byunghun moon

TI__Guru** 116090 points

As your another post, it's better to use the IQ in your code again, not convert it to real value except the all control algorithm code was based on absolute real value like using float point controller.
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I want to know vd/vq voltage scaling factor & real voltage value!