* The inductor may cause power factor error, and it also produces current lag. These effects make it difficult to apply PWM. By shutting current off abruptly it may create high-voltage spikes which can destroy devices.
* Your H-bridge is made solely from N devices. To turn them on-and-off requires bias volt levels which are sufficiently high or low at proper times during the cycle. I have seen a simulator have trouble when bias voltage is outside the supply rails.
It's the purpose of the AFE controller to correct the power factor and generate a sinusoidal mains current. Voltage spikes are clamped by design of the H bridge.
The schematic in post #1 is a principle circuit, abstracting from details like gate drivers. There a different abstraction levels in the simulation of power electronic circuits, we don't know which is used in FreeRiderCz's PSpice design. We should see pdf prints of the simulation schematic.
The control schematic involves a bit more than PI and PWM, there's also sine generation. Not clear how you implemented it. It's definitely possible with PSpice or Ltspice, using behavioral modelling elements.In OrCad 16.6 , i used PI regulator and PWM, but my simulation is making errors.
The control schematic involves a bit more than PI and PWM, there's also sine generation. Not clear how you implemented it. It's definitely possible with PSpice or Ltspice, using behavioral modelling elements.
Theta is a continuously increasing phase, not a constant. In other words, you have a sine generator and its phase is shifted according to the PI output. In a real AFE, theta has to be phase locked to the mains voltage.
Theta is not a phase shift, it's the running phase of the mains voltage, e.g. theta = ω*t = 2*pi*50*ti just think that theta (phase shift of voltage and current on input) is still 30 or 60 angle or 90
Theta is not a phase shift, it's the running phase of the mains voltage, e.g. theta = ω*t = 2*pi*50*t
inductor behind power source is needed by the design in theory of this rectifier you advice me to get rid of it?
Im not sure what exactly N devices mean in english.
Any suggestion how to get rid of that bias voltage?
Your schematic has icons for NPN transistors although N-mosfets may be intended on account of neighboring diodes (body diodes).
The aim is not to get rid of bias voltage but to apply sufficiently high and low bias voltage (PWM signals), in order to turn the transistors completely on and completely off.
Your schematic has no ground icons. Some simulators need to have a ground icon somewhere in a circuit, otherwise you get an error.
While you are in the experimental stage it is easier if you omit components such as the inductor that create unpredictable effects. Perhaps it is needed for regulation (or smoothing, or choke effect, etc.). You can add it later when the simulation runs without errors.
No, there can be only one ground node (node 0) in SPICE simulation circuits. Its choice isn't particularly critical, but the circuit must not be floating. I would choose the DC- node as ground.i actually got 2 grounds 1 on input side and one on output side...
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