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.
12.1.1. The Electrical Power Supply
The electrical power source provides ...