Split-Source Inverter

A schematic block diagram of the Split-source inverter component with corresponding switch arrangement and naming is given in Figure 1.

Weight of a Split-source inverter component for real-time simulation is 3.

Control

Selecting Digital inputs per switch as the Control parameter enables assigning 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 design of the external controller. 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 Internal modulator as the Control parameter, enables use of the internal PWM modulator for driving Phase A S1, Phase A S2, Phase B S1, Phase B S2, Phase C S1, and Phase C S2 switches instead of digital input pins. In this configuration, four additional component inputs will be present. En input is used as enable/disable and InA, InBand InC are used as referent signal inputs for internal PWM modulator.

Selecting Model as the Control parameter, enables setting of the IGBTs gate drive signals directly from the signal processing model. The input pin gates appears on the component. It is a vector input of six gate drive signals in the following order: [Phase A S1, Phase A S2, Phase B S1, Phase B S2, Phase C S1 and Phase C S2]. When controlled from the model, logic is always active high.

PESB Optimization

The PESB Optimization option is available in certain converter models. When PESB Optimization is enabled, all converter's short circuit state space modes will be merged and treated as the same state space mode. For example, if one converter leg within the three phase converter is short circuited and PESB Optimization is enabled, all of the legs within the three phase converter will also be short circuited. This simplification for short circuit modeling can save a significant amount of matrix memory.

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

• DC+ (electrical)
  • DC side + port.

• DC- (electrical)
  • DC side - port.

• a (electrical)
  • AC side port - phase A

• b (electrical)
  • AC side port - phase B

• c (electrical)
  • AC side port - phase C

• in (electrical)
  • Electrical port described in Figure 1

• gates (in)
  • Available if model control is selected
  • Vector of 6 input gate signals for switches

• En (in)
  • Available if Internal modulator control is selected
  • Used to enable/disable internal modulator

• InA(in)
  • Available if Internal modulator control is selected
  • Used to specify modulation signal value for internal modulator phase A

• InB(in)
  • Available if Internal modulator control is selected
  • Used to specify modulation signal value for internal modulator phase B

• InC(in)
  • Available if Internal modulator control is selected
  • Used to specify modulation signal value for internal modulator phase C

• Freq (in)
  • Available if Internal modulator control is selected and Variable carrier frequency is selected as the modulator's operation mode
  • Used to specify modulator's carrier frequency

General (Tab)

• Control
  • Specifies how switches are controled. It is possible to choose between: Digital input per switch, Internal modulator, and Model
  • More details about each type of control can be found in the Control section

• If Digital inputs per switch is selected as Control, the following properties can be used:
  • Phase A S1
    • Digital input that is used to control phase A S1 switch
  • Phase A S1 logic
    • Logic that will be applied to control signal for phase A S1
    • Active high or active low
  • Phase A S2
    • Digital input that is used to control phase A S2 switch
  • Phase A S2 logic
    • Logic that will be applied to control signal for phase A S2
    • Active high or active low
  • Phase B S1
    • Digital input that is used to control phase B S1 switch
  • Phase B S1 logic
    • Logic that will be applied to control signal for phase B S1
    • Active high or active low
  • Phase B S2
    • Digital input that is used to control phase B S2 switch
  • Phase B S2 logic
    • Logic that will be applied to control signal for phase B S2
    • Active high or active low
  • Phase C S1
    • Digital input that is used to control phase C S1 switch
  • Phase C S1 logic
    • Logic that will be applied to control signal for phase C S1
    • Active high or active low
  • Phase C S2
    • Digital input that is used to control phase C S2 switch
  • Phase C S2 logic
    • Logic that will be applied to control signal for phase C S2
    • Active high or active low
  • _control_property
    • Logic that will be applied to control signals for all switches
    • Active high or active low
  • Gate control enabling
    • If enabled, gives a possibility to control if changes in the gate control signal are applied or not
  • Sen
    • Available if Gate control enabling is enabled
    • Digital input that enables/disables switching
  • Sen_logic
    • Available if Gate control enabling is enabled
    • Logic that will be applied to Sen signal

• If Model is selected as Control, the following properties can be used:
  • Execution rate
    • Defines the period between two updates of gate signals for the component. Gate signals are provided as a signal processing input to component.

• If Internal modulator is selected as Control, the following properties can be used:
  • Operation mode
    • Specifies the source of the internal modulator carrier frequency
    • If Operation mode is Fixed carrier frequency, then frequency can be specified on the component properties
    • If Operation mode is Variable carrier frequency, then the frequency can be specified using a signal processing port
  • Carrier frequency (Hz)
    • Available if the Operation mode is a Fixed carrier frequency
    • Specifies the internal modulator's carrier frequency
  • Carrier phase offset
    • Specifies the internal modulator's carrier phase offset in degrees.
  • Dead time
    • Specifies dead time for the internal modulator in seconds
  • Reference signal [min, max]
    • Specifies carrier signal minimal and maximal value
    • Vector containing two values: the minimal carrier signal value, followed by the maximal carrier signal value
  • Load mode
    • Specifies on which event the new value of the modulation signal will be applied in the internal modulator
      • If on min is selected, new value will be applied when carrier reaches minimal value
      • If on max is selected, new value will be applied when carrier reaches maximal value
      • If on either is selected, new value will be applied when carrier reaches minimal or maximal value

Advanced (Tab)

• PESB Optimization
  • PESB Optimization is specific for optimization of real-time simulation and it is not applied to TyphoonSim at all. Changing its value will not affect TyphoonSim simulation at all.
  • Enables/disables PESB optimization. More details can be found in the dedicated PESB Optimization section.

• Snubber resistance
  • Specifies snubber resistance value.

Extras (Tab)