High voltage inverter monitoring

What is a power inverter?

A power inverter is an electrical power converter that changes DC power source to AC power source. The converted AC can be at any required voltage and frequency with the use of appropriate power switching devices, signal isolators, and control circuits.

How do EV charging and solar inverter systems work?

In electric vehicle (EV) charging and solar inverter systems, current sensors measure current flow by monitoring the voltage drop across a shunt resistor or the magnetic fields generated by current flowing through a conductor. These high-voltage systems use current flow information to control and monitor power conversion, charging and discharging.

Why do inverters need temperature sensing?

In the inverter operating control loop, key feedback information on current, bus current and voltage are required to achieve smooth control. To protect the key devices in the inverter such as the IGBTs, temperature sensing is often required to protect the expensive IGBTs from being damaged due to fault conditions.

What is a high-voltage connector?

The high-voltage connectors are modeled as resistors that have an open between them. This open can occur at any point within the interlock loop: before the load, between load resistors, or after the load. In this state, no current flows through the interlock loop, as shown by a change in the CS-Output current sensing test point. Figure 2-16.