Electrical Engineering ⇒ Topic : Types of Thyristor Drives

Types of Thyristor Drives

The following types of thyristor drives are employed :

• Single phase half-wave controlled rectifier circuits for D.C. motors upto 1 kW rating.
• Single phase half bridge circuits for D.C. motors of 5 to 75 kW rating.
• Three phase full bridge circuits for D.C. motors of 5 to 75 kW rating.
• Three phase full bridge circuitsl for D.C. motors of 75 to 400 kW rating.
• Twelve pulse convertors for D.C. motors of rating exceeding 400 kW.

For various applicatons D.C. motors require speed control in a forward direction, reverse direction and regenerative braking. In all thyristor drives, closed loop control is invaribly used