12.1. Electric Motor Drive Systems

The general form of an electric motor drive system or the so-called variable speed drive (VSD), which is shown in Fig. 12.1, consists of the following main parts:
• Electrical power supply
• Power electronics converter
• Electric motor
• Mechanical load
• Control unit
• Control observer and measuring unit
The functions of the motor drive system stages shown in Fig. 12.1 are discussed in the following sections.
Figure 12.1 Electric motor drive system.
(a) Block diagram of an electric motor drive system; (b) overview of an electric motor drive system.

12.1.1. The Electrical Power Supply

The electrical power source provides ...

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