Why is my voltage controlled current source circuit not reaching above 1A?
Figured out that the solenoid was the reason why the circuit would not reach 1.5A. The resistance of the coil was 15ohms at room temp, but when it heated up at high currents, the resistance would rise to about 22ohms. So, the solenoid was limiting the current. I confirmed that this was the case by attaching a lower resistance solenoid to the circuit, which managed to reach 1.5A no problem.