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"Speed control of three-phase asynchronous motor USING DSPIC30F4011"
introduction
Induction motors are widely used in high-performance drive systems, due to ITS Advantages as highly effective, very simple in construction, good power factor and does not require any engine start. Variable speed Operation CAN BE achieved by an asynchronous engine. So, now a days in many applications, such as washing machine and all the asynchronous Motors only desired.
Speed control method
Various speed control of AC asynchronous motor variable methods such as frequency (VVVF) has in practice today, But the most common method used and popular speed control technology, V/F method, where the voltage and frequency in proportion-But Many Podderžaniethe that constant stream so continuous torque is developed througho speed regulation range.
the Torque-speed characteristics of traffic
Features Of DSPIC
 Modified High Performance RISC processor.
• 48 KB of on-chip Flash program space.
 2 KB of data RAM on chip
 1 KB non-volatile EEPROM date
 Enter the generator 4 Mhz-10 Ghz PLL with active.
 16 * 16-bit working register array.
 2 UART FIFO buffer modules.
• 6-channel PWM output.
• analog-to-digital converter with S/H input 4.
DSP Vs DSPIC
• DSP is difficult than DSPIC.
 Cost DSP above DSPIC.
 design and download easily DSPIC
 DSPIC devices include peripheral space on the chip, which fee is reduced
 Using the DSPIC, the system performance will be increased.
a review of the literature
 Alfredo, Thomas a. Lipo, and Donald w. Nowotny, "ANovyj induction motor V/F control, high performance management Capable Method at low speeds," IEEE Trans. Industry applications, vol. 34, no. 4 July/August, 1998.
 z. Cucej and Svecko, "optimal PWM controller for inverter-driven induction motor year." ' IEEE Trans., vol. 53, no. 2.
 k. Koga, r. Ueda and t. Sonada, the "Constitution of the V/F speed control to reduce errors in the system of asynchronous motor in CONF. Rec. IEEE-IAS Annu. Meeting, 1990.
 b. Slabiak and l. Lawson, "three-phase asynchronous motor control Preceise ranging from single phase power Use" ACSE journal, volume (6), release (3), October 2006 year
block diagram
containing three-phase inverter bridge
advantages
• Simple, cost-effective and high performance of topology control.
 the V/F not only controls the speed of the engine, it also improves the steady state and dynamic characteristics of the engine.
• due to the lack of a high starting current, the effective service life of the machine is improved.
• the maximum torque is obtained in a short time.
 due to high stress, the improved performance of the machine.
 to V/F method, precise control of speed and average CAN BE achieved will be reduced power consumption.
applications
• washing machine
• paper mills
• textile mills
 cold
 conveyors
• industrial controllers
 Robotics
Expected results
The prototype is designed and tested to be set for different speeds and loads of different signals, which will be celebrated in the SWD. The linear current can be observed.TheproposedPredlagaemaâ work, is expected to show that by changing the voltage and frequency in proportional speed control of three-phase asynchronous engine friends.