ISO 21498-2:2021 Electrically propelled road vehicles — Electrical specifications and tests for voltage class B systems and components — Part 2: Electrical tests for components.
6.4.4 Requirements
It shall be verified that the voltage class B operatingstatus of the component in the respective operating voltage range does not change due to voltage slope occurring in the voltage class B circuit. The DIJT shall perform as specified.
The operating behaviour of the component shall he documented.
6.5 Generated voltage ripple
6.5.1 Purpose
This test describes a standardized test setup and test method to enable comparability of the generated voltage ripple of voltage class B components. In this document voltage ripple within a frequency range between 10 Hz and 150 kI-Iz is considered. They are characterised by their peak-to-peak voltage in time domain and their dominating frequencies.
6.5.2 Test setup
For this test, a test setup according to Figure 9 shall be used. It consists of the DUT, a variable HV DC power supply and an artificial network.
The artificial network emulates the dynamic behaviour of a vehicle power network and the internal resistance of the battery. A setup and impedance characteristics for the artificial network are given in Annex D and shall be followed. It is allowed to simplify the test setup if there is no influence on the result. Proof of compliance of the artificial network is provided in Annex D.
6.5.3 Test procedure General Install the DUT in a test setup according to Figure 9 and verify that all functions operate according to OS1 at a voltage within the specification for unlimited operation (e.g. U init ). The voltage U HV , within the artificial network shall be monitored and evaluated. An example is given in Figure 10. Examples for the test setup are given in Annex E. For the test, the DUT shall be operated in OS1 at a specified operating point. To determine worst-case voltage ripple, the DUT shall work in the operating point where the highest amplitude of the generated voltage ripple is expected. If such operating point is not known, the DUT shall be operated at a DC working voltage and with an output power as defined in Table 11. If the highest ripple is expected to be reached with various operating points (e.g. speed and torque), the operating points themselves as well as the number of operating points shall be agreed between customer and supplier.
6.6 Immunity to voltage ripple 6.6.1 Purpose This test verifies stable electrical operation of the component when a voltage ripple is present on the class B supply voltage. In this test, the component’s behaviour at frequencies between 10 Hz and 150 kHz is evaluated. 6.6.2 Test setup For this test, a test setup according to Figure 13 shall be used. A DC power supply provides the DC part (U HV,DC ) of U HV and the AC part (U HV,AC ) of U HV shall be generated by an AC voltage source. A coupling/ decoupling network (e.g. a transformer) shall be used to combine the DC and AC voltages. Due to the wide frequency range, it is allowed to change the test setup during the test (e.g. change the coupling transformer, AC voltage source, etc.).ISO 21498-2 pdf download.