Rotor and motor

A rotor comprising:

• a plurality of magnetic pole portions arranged along a circumferential direction of a rotor core, wherein each of the magnetic pole portions includes a magnet forming one of two magnetic poles;
• and
• first and second ferric core portions arranged in the rotor core and located between adjacent ones of the magnetic pole portions in the circumferential direction, wherein
• each of the first and second ferric core portions functions as the other one of the magnetic poles,
• a first gap is formed between each of the first and second ferric core portions and a magnetic pole portion located at a first circumferential side,
• a second gap is formed between each of the first and second ferric core portions and a magnetic pole portion located at a second circumferential side,
• the first gap at the first circumferential side of the first ferric core portion has a smaller width than the second gap at the second circumferential side of the first ferric core portion,
• the first ferric core portion is inclined toward the first circumferential side,
• the first gap at the first circumferential side of the second ferric core portion has a larger width than the second gap at the second circumferential side of the second ferric core portion,
• the second ferric core portion is inclined toward the second circumferential side,
• each of the magnetic pole portions extends in a direction orthogonal to a radial direction of the rotor core,
• each of the first gap and the second gap is only formed between each of the first and second ferric core portions and the magnetic pole portion, and
• only one ferric core portion of the first and second ferric core portions is located between adjacent magnetic pole portions.