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THE APPLICATION OF FIELD ORIENTED CONTROL TO THE BRUSHLESS DC MACHINE
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| Author(s) |
M. T. Wishart; R. G. Harley; G. Diana |
| Abstract |
The brushless DC machine (BDCM) is similar in structure to the permanent magnet synchranous machine (PMSM) except that its windings and magnets are arranged in a way which produces a trapezoidally shaped back emf rather than a sinusoidally shaped back emf. This paper considers the effect of applying field oriented control (FOC) to the trapezoidally excited brushless DC machine (BDCM). The mathematical model of the BDCM and its inverter is presented and its FOC theory is briefly described. The practical system, built to implement this type of control, is described in detail and simulation studies are conducted. Practical results captured from the physical system are presented for both speed and position control applications agree well with the simulated results. For both speed and position control applications the responses are linear and show no sign of torque oscillations. Although this system would not usually be used for speed control applications (due to economic considerations) it provides a viable alternative to conventional techniques for position control applications. |
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| Filename: | Unnamed file |
| Filesize: | 3.176 MB |
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| Type |
Members Only |
| Date |
Last modified 2019-08-06 by System |
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