This greatly eases the problem of starting the massive rotor of a large synchronous motor. It is now driven by a Smith's of Derby synchronous motor. Its distributed poles make it act like a permanent magnet synchronous motor (PMSM). The reactive power drawn by the synchronous motor is a function of its field excitation. One technique to control a permanent magnet synchronous motor is Field Oriented Control. The unit weighs only 32 kg and is a permanent magnet synchronous motor. The stator of synchronous motor and stator of induction motor are similar in construction. The construction of synchronous motor is similar to that of a synchronous alternator. Furthermore, the accuracy of the quartz clock superseded the principles of the synchronous motor. It consists of a synchronous motor driving a set of heavy-duty electrical contacts. The Leaf is powered by an electric synchronous motor with and driving the front wheels. The synchronous motor can also be used as an alternator. The synchronous motor produces its rated torque at exactly synchronous speed. An over-excited synchronous motor has a leading power factor. The converters consist of a three-phase synchronous motor and a single-phase synchronous generator.