Three Phase Three Level Flying Capacitor Inverter

A schematic block diagram of the inverter switching block is given in Figure 1.

Weight of Three Phase Three Level Flying Capacitor Inverter component for real-time simulation is 3.

Control

Selecting Digital inputs as the Control parameter, enables assignment of gate drive inputs to any of the digital input pins (from 1 to 32 (64)). For example, if Phase A S1 is assigned to 1, the digital input pin 1 will be routed to the Phase A S1 switch gate drive. In addition, the gate_logic parameter selects either active high (High-level input voltage VIH turns on the switch), or active low (Low-level input voltage VIL turns on the switch) gate drive logic, depending on the external controller design under test. In TyphoonSim, digital signals are read from the internal virtual IO bus. Hence, if some signal is sent to digital ouput 1, it will appear on digital input 1.

Selecting Model as the Control parameter, enables IGBT gate drive signals to be set up directly from the signal processing model. The input pin gates appears on the component and requires a vector input of twelve gate drive signals in the following order: [Phase A S1, Phase A S2,…, Phase B S1, Phase B S2, … , Phase C S1, Phase C S2, ...]. When controlled from the model, logic is always active high.

Selecting Internal modulator as the Control parameter, enables use of the internal PWM modulator for driving the switches instead of the digital input pins. In this configuration, four additional component inputs will be present. The En input is used to enable/disable the internal PWM modulator, while InA, InB, and InC are used as a reference signal inputs for the corresponding converter legs. Each of the legs implements the modulation strategy shown in Figure 2.

Timing

When Enable delays is enabled, turn on and turn off delay of the IGBTs will be included in the simulation. More information about this feature can be found on the dedicated switching delay section.

Digital Alias

If a converter is controlled by digital inputs, an alias for every digital input used by the converter will be created. Digital input aliases will be available under the Digital inputs list alongside existing Digital input signals. The alias will be shown as Converter_name.Switch_name, where Converter_name is name of the converter component and Switch_name is name of the controllable switch in the converter.

Ports

General (Tab)

Flying Capacitor (Tab)

Timing (Tab)

• Enable delays
  • Not supported in TyphoonSim yet, hence this signal will be zeroed. Enabling this signal will not affect TyphoonSim simulation at all.
  • Enables delays for turn on and off events

• Turn on delay
  • Specifies the delay that is applied to turn on events

• Turn off delay
  • Specifies the delay that is applied to turn off events
    • Vector consisting of current values and corresponding turn off delay. Every current value must be followed by the expected turn off delay.

Extras (Tab)