ABSTRACT
Advanced comfort and safety features require a power electronic converter and a microcontroller for software control of the machine drive. Unidirectional motor drives are used for permanent magnet or wound field commutator motors, that can be controlled by a switch in series with the power supply. A H-bridge converter is made up of four MOSFET transistors and it can supply the dc motor with both polarities of the dc voltage. The emergence of ac motor drives in automotive applications requires a closer look at ac generating power converters. A low-frequency sine-wave reference is compared with a high-frequency carrier waveform. When the sine-wave is above the triangular signal, the upper-side transistor is turned on. Mechatronics represents an engineering field highly developed in automotive applications. It requires extensive use of electronic control and power electronic converters for the actuation of solenoids, relays, or motors. A series of sensors are associated with low power motor drives used in automotive body systems.
