A step to ubiquitous OACC; CHIPS OACC workforce development. K-8, HS, JC, ...; "My first OACC". What is PySpice? What is AI Gemini? "code pyspice LC tank circuit add transformer to circuit" code pyspice LC tank circuit add transformer to circuit I'd be glad to assist you with creating a PSpice simulation for an LC tank circuit with a transformer. Here's the code incorporating the key elements and considerations: Python

import pyspice
from pyspice.spice import Spice

# Circuit elements
# L1 (inductor)
L1_value = 1e-6  # 1 uH
L1_name = 'L1'

# C1 (capacitor)
C1_value = 10e-9  # 10 nF
C1_name = 'C1'

# Primary side (source, resistor)
Vin = 1  # Amplitude of the input voltage source
Vin_freq = 1e3  # Frequency of the input voltage source (1 kHz)
R1_value = 1e3  # Resistance on the primary side

# Transformer parameters
# Ideal transformer model (1:1 turns ratio assumed for simplicity)
# You can adjust the turns ratio (n1:n2) as needed
n1 = 1  # Primary turns
n2 = 1  # Secondary turns
K = n1**2 / n2**2  # Transformer coupling coefficient (unity for 1:1 turns ratio)

# Secondary side (resistor)
R2_value = K * R1_value  # Reflected impedance on the secondary side

# Create a new circuit simulation
circuit = Spice(Spice.Circuit())

# Add voltage source
Vin_src = circuit.V('input', 1, 0, dc=0, ac=mag=Vin, freq=Vin_freq)

# Add inductors
circuit.L(L1_name, 1, 0, L1_value)

# Add capacitors
circuit.C(C1_name, 2, 0, C1_value)

# Add resistors
circuit.R('R' + R1_name, 1, 0, R1_value)
circuit.R('R' + R2_name, 2, 0, R2_value)

# Ideal transformer model (using VCVS for simplicity)
# Adjust the polarity dots as necessary based on your transformer's winding directions
circuit.V('T1', 2, 0, circuit.model('VCVS', K=K, C=1e-12), ac=1)  # Secondary voltage source controlled by primary

# Analysis
analysis = circuit.tran(start=0, stop=1e-3, step=1e-6)  # Transient analysis for 1ms with 1us steps

# Simulate the circuit
circuit.simulate(analysis)

# Plot the results
circuit.plot(Vin_src, C1_name+'(V)')  # Plot input voltage and capacitor voltage

Explanation: 1. Import Libraries: Import necessary libraries (

pyspice

and

Spice

from

pyspice.spice

). 2. Circuit Elements: Define component values and names for the inductor (L1), capacitor (C1), primary side resistor (R1), and secondary side resistor (R2). ◦ *Transformer:*Set the turns ratio (n1:n2) in the

n1

and

n2

variables. Adjust these values as needed for your specific transformer. ◦ Calculate the transformer coupling coefficient

K

based on the turns ratio. 3. Circuit Creation: Create a new circuit simulation using

Spice.Circuit()

. 4. Voltage Source: Add a voltage source (

Vin_src

) with the specified amplitude (

Vin

), frequency (

Vin_freq

), and DC offset (set to 0 here). 5. Inductors and Capacitors: Add the inductor

L1

and capacitor

C1

to the circuit. 6. Resistors: Add resistors

R1

on the primary side and

R2

on the secondary side. The value of

R2

is calculated based on the transformer coupling coefficient

K

to account for the reflected impedance. ◦ *Ideal Transformer Model:*Use a voltage-controlled voltage source (VCVS) to model the ideal transformer. This is a simplified approach. ◦ Set the gain (

K

) of the VCVS to the transformer coupling coefficient. ◦ Connect the primary and secondary sides of the transformer using the VCVS element. Adjust the polarity dots based on your transformer's winding directions. 7. Analysis: Define a transient analysis (

tran

) to simulate the circuit's behavior over time. Set the start time (

start

), stop time (

stop

), and step size (

step

). 8. Simulation: Simulate the circuit using `circuit. Slack Conversation