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The wind turbine system as a power plant is growing rapidly in line with the electrical energy needs and limitations of fossil energy as a source of electrical energy. Many research has been carried out to develop wind turbine systems and improve system efficiency. Research on wind turbine systems requires wind turbine emulators to simulate the behavior of wind turbines against changes in wind speed. In this paper presents a Design of speed controller based on PI controller for a Wind Turbine Emulator (WTE) using a Variable Speed Drive (VSD). WTE consists of VSD, microcontroller, 3 phase induction motor, Permanent Magnet Synchronous Generator (PMSG) and speed sensor. PMSG speed depends on wind speed. At certain wind speeds, PMSG will rotate at a certain value. Wind turbine emulator will adjust the speed of the induction motor according to a certain wind speed. WTE controls the rotation of a 3 phase induction motor connected to its axis in PMSG. Motor and PMSG rotation speed are measured by rotary encoder sensor as speed sensor. The rotary encoder sensor serves as feedback for WTE. Proportional-integral method is used to control the speed of a 3 phase induction motor through VSD analog input. Based on experiment result, PI controller can adjust speed of induction motor so that PMSG will rotate according to a certain wind speed. Here we observe speed response of WTE to generate voltage of PMSG. WTE controls the speed of induction motor at settling time 9s.