Hi guys,
I'm making an inverter. To gen the PWM pulses to Mosfet drivers i'm using a TL494.
The IC is generating a internal sawtoth wave @40khz.
I'm using "Error Amplifier 1" as an Input(sine wave) with unitary gain. And don't using "Error Amplifier 2".
I grounded the Output Ctrl so there is no flip flop.
I hope that circuit makes an sawtoth(40khz) that samples sine wave(60hz). Then PWM comparator makes the pulses to Mosfet drivers.
I'm using orcad capture CIS, the circuit is atached.
I got that errors:
"ERROR -- Convergence problem in transient analysis at Time = 749.6E-06"
These supply currents failed to converge:
I(X_U1.xinsttl494.Ev103) = -29.80nA \ 0A
I(X_U1.xinsttl494.X_U3.X2.E1) = 219.09nA \ 218.83nA
I(X_U1.xinsttl494.X_U3.X2.E2) = 219.09nA \ 218.83nA
These devices failed to converge:
X_U1.xinsttl494.X_U3.X1.Q1
I'm making an inverter. To gen the PWM pulses to Mosfet drivers i'm using a TL494.
The IC is generating a internal sawtoth wave @40khz.
I'm using "Error Amplifier 1" as an Input(sine wave) with unitary gain. And don't using "Error Amplifier 2".
I grounded the Output Ctrl so there is no flip flop.
I hope that circuit makes an sawtoth(40khz) that samples sine wave(60hz). Then PWM comparator makes the pulses to Mosfet drivers.
I'm using orcad capture CIS, the circuit is atached.
I got that errors:
"ERROR -- Convergence problem in transient analysis at Time = 749.6E-06"
These supply currents failed to converge:
I(X_U1.xinsttl494.Ev103) = -29.80nA \ 0A
I(X_U1.xinsttl494.X_U3.X2.E1) = 219.09nA \ 218.83nA
I(X_U1.xinsttl494.X_U3.X2.E2) = 219.09nA \ 218.83nA
These devices failed to converge:
X_U1.xinsttl494.X_U3.X1.Q1
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