Obtaining an accurate estimate of the magnetic flux in permanent magnet synchronous machines is a considerable challenge especially at very low speeds and in the presence of parameter variations. Significant research has been done to develop methods of estimation that can overcome issues such as drift in numerical integration and variations in machine parameters. This paper proposes a new technique for the estimation of the magnetic flux in permanent magnet synchronous machines. The proposed technique is based on the field reconstruction method. Experimental and simulation results for a permanent magnet synchronous machine are provided to validate the precision of the proposed flux estimation technique.