IEC TS 61800-8 pdf download Adjustable speed electrical power drive systems – Part 8: Specification of voltage on the power interface
This part of IEC 61 800 gives the guidelines for the determination of voltage on the power interface of power drive systems (PDS’s).
NOTE The power interface, as defined in the IEC 61 800 series, is the electrical connection used for the transmission of the electrical power between the converter and the motor(s) of the PDS.
The guidelines are established for the determination of the phase to phase voltages and the phase to ground voltages at the converter and at the motor terminals.
These guidelines are limited in the first issue of this document to the following topologies with three phase output
• indirect converter of the voltage source type, with single phase diode rectifier as line side converter;
• indirect converter of the voltage source type, with three phase diode rectifier as line side converter;
• indirect converter of the voltage source type, with three phase active line side converter.
All specified inverters in this issue are of the pulse width modulation type, where the individual output voltage pulses are varied according to the actual demand of voltage versus time integral.
Other topologies are excluded of the scope of this International Specification.
Safety aspects are excluded from this Specification and are stated in IEC 61 800-5 series.
EMC aspects are excluded from this Specification and are stated in IEC 61 800-3.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 61 000-2-4, Electromagnetic compatibility (EMC) – Part 2-4: Environment – Compatibility levels in industrial plants for low-frequency conducted disturbances
3 Overview and terms and definitions
3.1 Overview of the system
A power drive system (PDS) consists of a motor and a complete drive module (CDM). It does not include the equipment driven by the motor. The CDM consists of a basic drive module (BDM) and its possible extensions such as the feeding section or some auxiliaries (e.g. ventilation). The BDM contains converter, control and self-protection functions. Figure 1 shows the boundary between the PDS and the rest of the installation and/or manufacturing process. If the PDS has its own dedicated transformer, this transformer is included as a part of the CDM.