Device couplings - Ideal Transformer

This section describes device couplings

Device coupling components are ideal transformers with a transfer ratio of one. They are used to partition the complete power electronics circuit into separate circuits that are emulated on different HIL devices. These components are only used in multi-HIL configurations where HIL devices are paralleled. Device coupling components define the communication variables between HIL devices, that are exchanged true High Speed Serial Link (HSSL). This ideal transformer block introduces the variable time delay (~2 ┬Ás) between measured variables and corresponding controlled sources, which is negligible for most practical systems. This delay depends on the amount of data that has to be transmitted true HSSL.

For more details regarding to HIL paralleling and multi-HIL systems please refer to t-ug11 (HIL paralleling guide).

Note: Device coupling components must be used together with HIL markers which are described in section Device marker. For more details about coupling placement please refer to Coupling component placement and parametrization - Ideal Transformer based couplings.

Single-phase device coupling

A single phase device coupling component is an ideal transformer with a transfer ratio of one, used to divide the simulated circuit into two sub-circuits. Consequently, the two sub-circuits are distributed and executed in two separate HIL devices. In addition, this ideal transformer introduces a time delay (~2us) between measured variables and corresponding controlled sources, which is negligible for most practical systems.

Table 1. Single phase device coupling component in the HIL Toolbox
component component dialog window component parameters

Single phase device coupling

  • Current source side snubber type
  • Current source side resistance: R1
  • Current source side capacitance: C1
  • Voltage source side snubber type
  • Voltage source side resistance: R2
  • Voltage source side inductance: L1

For more details regarding to HIL paralleling and multi-HIL systems please refer to t-ug11 - HIL paralleling guide

Figure 1: The schematic block diagram of a single phase device coupling component with two measurement ports (Va and Ia), two controlled sources, and two snubber resistors

For more details about coupling placement please refer to Coupling component placement and parametrization - Ideal Transformer based couplings.

Three-phase device coupling

A three phase device coupling component is of two ideal transformers as shown in Figure 2 with a transfer ratio of one, used to divide the simulated circuit into two sub-circuits. Consequently, the two sub-circuits are distributed and executed in two separate HIL devices. In addition, these ideal transformers introduce a time delay (~2us) between measured variables and corresponding controlled sources, which is negligible for most practical systems.

Table 2. Three phase device coupling component in the HIL Toolbox
component component dialog window component parameters

Three phase device coupling

  • Current source side snubber type
  • Current source side resistance: R1
  • Current source side capacitance: C1
  • Voltage source side snubber type
  • Voltage source side resistance: R2
  • Voltage source side inductance: L1

For more details regarding to HIL paralleling and multi-HIL systems please refer to t-ug11 - HIL paralleling guide.

Figure 2: The schematic block diagram of a three phase device coupling component

For more details about coupling placement please refer to Coupling component placement and parametrization - Ideal Transformer based couplings.

Four-phase coupling

A four phase device coupling component is of three ideal transformers as shown in Figure 3 with a transfer ratio of one, used to divide the simulated circuit into two sub-circuits. Consequently, the two sub-circuits are distributed and executed in two separate HIL devices. In addition, these ideal transformers in traduce a time delay (~2us) between measured variables and corresponding controlled sources, which is negligible for most practical systems.

Table 3. Four phase device coupling component in the HIL Toolbox
component component dialog window component parameters

Four phase device coupling

  • Current source side snubber type
  • Current source side resistance: R1
  • Current source side capacitance: C1
  • Voltage source side snubber type
  • Voltage source side resistance: R2
  • Voltage source side inductance: L1

Figure 3: The schematic block diagram of a four phase device coupling component

For more details about coupling placement please refer to Coupling component placement and parametrization - Ideal Transformer based couplings.