Abstract: A regenerative drive control is connectable to an AC power source and includes a negative converter bridge (10) having an input (12, 14, 16) connectable to the AC power source and an output connectable to a DC bus, including a positive bus (18) and a negative bus (20), a load (24) having inductance and resistance and operable to generate regenerative current and direct regenerative current through the negative converter bridge to the AC power source. The negative converter bridge includes a plurality of SCR's (41, 42, 43, 44, 45, 46) arranged in a plurality of series connected pairs with each series connected pair forming a leg of the converter bridge which extends between the positive and negative buses. A gating circuit (80) is provided for sequentially gating the SCR's to establish a controllable DC output on the DC bus. Sensing means (110) for generating an inhibit signal indicative of a fault is provided.