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Unidirectional electrified transverse magnetic flux BLDC motor of single phase is proposed by the authors. In the case of the single-phase motor, torque pulsation is big. The torque pulsation decreases, if this is changed into the polyphase motor. The authors propose the polyphase motor in which the product between rotor magnet number and phase number becomes a number of the stator electromagnet....
A unidirectional energized Brushless DC (BLDC) motor can be adopted for a small motor system. The Minato motor is one such unidirectional energized BLDC motor. Recently, bi-directional energized BLDC motors are being studied. Since controlling the torque direction by each armature winding for unidirectional motor system is easy, we developed a high efficient unidirectional energized BLDC motor. The...
Unidirectional energized Brushless DC (BLDC) motor can be adopted in a small motor system. Minato motor is one of the unidirectional energized BLDC motors. Recently, bidirectional energized BLDC motor is being mainly studied. However, controlling the direction of the torque by each armature winding for unidirectional motor system is easier. Therefore, the authors developed a high efficient unidirectional...
In a small motor system, DC brushless motor, in which unidirectional current flows, can be adopted. Minato motor is one of the unidirectional current type DC brushless motors. However, recently, the DC brushless motor, in which the bidirectional current flows, is being mainly studied. The unidirectional motor system is easy to control the direction of the torque by each armature winding. Considering...
In an electric car, wide range speed driving is required. In order to increase the rotation speed of a bidirectional current type cylindrical BLDC motor, the applied voltage needs to be increased because of the increase of back-EMF. When that voltage gets to a maximum value, torque current, iq stop increasing. In order to increase iq, negative direct axis armature current, id, is generated. In other...
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