The invention discloses an alternative-current / direct-current (AC / DC) dual-purpose
motor control system, which is characterized in that: an
electric power electronic part
Insulated Gate Bipolar Transistor (IGBT) is adopted as a non-contact controllable switch to form a control main circuit, a digital
microprocessor is adopted as a control core to form a micro-controller-based AC / DC dual-purpose
motor control system. The control main circuit firstly adopts four power diodes to form a single-phase full-wave
rectifier bridge, so an external
AC power supply
system and an external DC power supply system are unified to an internal DC power supply. An AC / DC dual-purpose
motor control topology main circuit is arranged behind the
rectifier bridge. The IGBT in the control topology main circuit is connected and disconnected according to a given discipline, so the connection order of different homonymous ends of a motor exciting winding and an armature winding can be realized, and the motor can run in the
positive direction and the opposite direction or can be braked in the
positive direction and the opposite direction. Due to the adoption of the AC / DC dual-purpose motor
control system, the service life of the system is greatly improved, the
electric arc and spark of the switch can be eliminated, the size can be reduced, and complicated functions of an AC / DC dual-purpose such as soft starting, stepless speed regulation and the like can be realized. The invention also provides a full-digital communication
field bus interface so as to realize the remote monitoring of a
field bus.