This paper considers brushless DC position control systems with unknown external load disturbance and plant parameter variations. Since the dynamic characteristics of such systems are very complex and highly nonlinear, a conventional linear controller design may not assure satisfactory requirements. To improve the dynamic response of such systems, an integral-compensated variable structure control (IVSC) has been proposed. The approach comprises an integral controller for achieving a zero steady-state error response under step input, and a variable structure controller for enhancing the robustness. Simulation results show that the proposed approach gives a rather accurate servo tracking result and is fairly robust to plant parameter variations and external load disturbance.