Abstract—This paper discusses the development of wireless structure control of an induction motor scalar drives. This was realised up on the wireless WiFi networks. This strategy of control is ensured by the use of Wireless ad hoc networks and a virtual network interface based on VNC which is used to make possible to take the remote control of a PC connected on a wireless Ethernet network. Verification of the proposed strategy of control is provided by experimental realistic tests on scalar controlled induction motor drives. The experimental results of the implementations with their analysis are detailed. Keywords—Digital drives, Induction motor, Remote control, Virtual Network Computing VNC, Wireless Local Area Network WiFi. I. INTRODUCTION SING wireless technologies in industrial and factory automation is very attractive for many reasons. The wireless way of communicating makes plant setup and modification easier, cheaper, and more flexible. It provides a natural approach towards communication with mobile equipment where wires are in constant danger of breaking. It enables new applications where wireless transmission is the only option, e.g., measurements and control of rotating or highly mobile devices, and provides a novel approach to existing applications, e.g., localization and tracking of goods. Furthermore, tasks like machine diagnosis and maintenance can be greatly simplified by equipping the maintenance personnel with wireless terminals. In many factory and automation applications, the communication needs are traditionally served by wired technologies. These communication systems have been specifically designed to meet the stringent real-time and reliability requirements found in many industrial applications. Of course, wireless technologies should ideally provide the same type and quality of services to industrial users as the traditional, wired technologies do [10]. However, wireless technologies differ in a number of ways from wired ones. These differences present significant challenges for the design of network architectures, protocols, and tools for industrial and automation applications [1]–[2]–[3]. This paper describes our experiences combining wireless technologies the IEEE 802.11 family of standards and virtual Benmabrouk. Zaineb is with the National Engineering School of Gabes, Tunisia (corresponding author to provide phone: 216-75-392-100; fax: 216- 75-392-190; e-mail: benmabroukzar@ yahoo.fr). Ben. Hamed. Mouna, Jr., the National Engineering School of Gabes, Tunisia (e-mail: benhamed2209@yahoo.fr). Lassaad. Sbita is with the National Engineering School of Gabes, Tunisia (e-mail: lassaad.sbita@enig.rnu.tn). network interface based on VNC (Virtual Network Computing), in order to achieve real-time control over an induction motor using a wireless data network ad-hoc. Wireless Control of an Induction Motor can be applied to carry out control and monitoring in different environments, such as dangerous environments. II. COMPARISON OF WIRELESS SYSTEMS At first, we examined three different systems. All three systems have been designed for use in different scenarios, thus offering various advantages and disadvantages over one another depending on their use. The 802.11 systems are suitable for transmitting large amounts of data. IEEE 802.15.4 is suitable when communication is infrequent, small packet sizes are used, and power consumption is an issue. Bluetooth fills the gap between these two by being able to transmit at medium data rates with a lower power consumption than IEEE 802.11[4] (see also Table I). TABLE I COMPARISON OF BLUETOOTH, IEEE 802.15.4 AND IEEE 802.11 TECHNOLOGIES Protocols Zigbee Bluetooth WiFi IEEE 802.15.4 802.15.1 802.11a/b/g Power consumption very low low medium Number of nodes 65 000+ 7 32 Throughput max 250 Kb/s 1 Mb/s 11-54 Mb/s Range 100m 10m 300m Today, an IEEE 802.11 device is installed in many personal computers. It is very popular, known, available and easy to deploy. It is designed to provide users with high data rates (tens of Mbit/s) over ranges of tens to hundreds of meters. Bluetooth and IEEE 802.15.4 are designed to provide user with data rates in the order of hundreds of Kbit/s to a few Mbit/s and have ranges on the order of a few meters. To develop control of wireless Networked systems using personal computers, 802.11 wireless networks is most effective for this application. Benmabrouk. Zaineb, Ben Hamed. Mouna, Lassaad. Sbita Wireless Control for an Induction Motor U International Journal of Electrical and Electronics Engineering 5:1 2011 1