Electric motor's sectional rotor with asymmetric poles having permanent magnets

{
  "publication_number": "US9831729B2",
  "country": "US",
  "kind": "B2",
  "title": "Electric motor's sectional rotor with asymmetric poles having permanent magnets",
  "abstract": "A rotor is and a motor including the rotor and a stator are provided. The rotor includes a rotor core and rotor poles. The rotor poles are arranged circumferentially around the rotor core, and each of the rotor poles is formed in an asymmetric shape. The stator is spaced apart from the rotor and includes slots which are configured so that a coil may be wound around the slots.",
  "claims": [
    "1. A rotor comprising: a rotor core; and a plurality of rotor poles arranged circumferentially around the rotor core, wherein each of the plurality of rotor poles is formed in an asymmetric shape, and wherein each of the plurality of rotor poles comprises: a permanent magnet embedded in the rotor core, the permanent magnet oriented such that a longest dimension of the permanent magnet is a length which extends along a circumferential direction of the rotor core, wherein the length of the permanent magnet is greater than a thickness of the permanent magnet, wherein the thickness extends in a radial direction of the rotor core, and wherein the permanent magnet comprises a right portion having a first length and a first thickness along the radial direction of the rotor core, wherein the first thickness is consistent over the first length, and a left portion having a second length and a second thickness, different from the first thickness, along a the radial direction of the rotor core, wherein the second thickness is consistent over the second length, wherein a first side of the right portion facing the rotor core and a first side of the left portion facing the rotor core form a continuous straight line.",
    "2. The rotor of claim 1, wherein the rotor core comprises a plurality of flux barriers, wherein, for each permanent magnet, one flux barrier is in contact with a side of the right portion and another flux barrier is in contact with a side of the left portion.",
    "3. The rotor of claim 1, wherein the permanent magnet comprises the right portion and the left portion without any intermediary portions therebetween."
  ],
  "description_excerpt": "1. Field\n\nApparatuses consistent with exemplary embodiments relate to a motor used in various industrial fields, such as electric vehicles and home appliances, to convert electrical energy into mechanical energy.\n\n2. Description of Related Art\n\nHybrid vehicles and electric vehicles have gained more popularity due to harmful environmental effects from the air pollution and an increasing shortage of fossil fuels. Hybrid vehicles use internal-combustion engines to generate power and use electric motors as auxiliary power sources. Electric vehicles use electric motors as their main power sources.\n\nWith the development of technologies for a battery and a motor, it is expected that an electric vehicle, known as a pollution-free car, will substitute for “transition” vehicles, such as hybrid cars, since electric vehicles emit no pollutants or carbon dioxide while driving.\n\nThe motor of an electric vehicle which functions as an engine converts electric energy supplied from a battery into mechanical energy. Thus, the performance of the battery and the motor is one of the most important factors in determining the power and driving distance of the electric vehicle. Accordingly, to achieve an increase in the power and driving distance of an electric vehicle, an improvement in power density and efficiency of the motor, as well as an enhancement of battery performance, are considered important.",
  "cpc": [
    "H02K 1/274",
    "H02K 1/26",
    "H02K 1/276",
    "H02K 1/278",
    "H02K 2201/03",
    "H02K 2201/15",
    "H02K 2213/03"
  ],
  "ipc": [
    "H02K 1/27"
  ],
  "assignees": [
    "Samsung Electronics Co Ltd"
  ],
  "inventors": [
    "Sung-il Kim",
    "Sung-Hyuk Park"
  ],
  "filing_date": "2012-11-13",
  "publication_date": "2017-11-28",
  "grant_date": "2017-11-28",
  "priority_date": "2012-01-16",
  "application_number": "US-201213675648-A",
  "family_id": "47080194",
  "cited_by_count": 14,
  "citations": [
    "GB1324147A",
    "US4327302A",
    "EP0333869A1",
    "US5010266A",
    "DE3742502A1",
    "JPH05137304A",
    "JPH099537A",
    "EP0803962A1",
    "US6800977B1",
    "US20040112655A1",
    "EP1130740A2",
    "US6885122B2",
    "JP2003189567A",
    "US6717323B1",
    "CN1659768A",
    "US20050258700A1",
    "JP2004328992A",
    "US6987342B2",
    "US7196446B2",
    "US20040212266A1",
    "KR100603645B1",
    "CN1951013A",
    "US7425808B2",
    "JP2006223052A",
    "US7535146B2",
    "CN1901334A",
    "DE102005047771A1",
    "US7646125B2",
    "JP2008182825A",
    "US20080231135A1",
    "CN101478212A",
    "US20090134732A1",
    "US7868502B2",
    "JP2009268204A",
    "CN101771315A",
    "US20100141076A1",
    "US20100148612A1",
    "WO2010070900A1",
    "JP2010148235A",
    "US8653710B2",
    "US20110309706A1",
    "US20100213781A1",
    "CN101820238A",
    "WO2010110150A1",
    "KR20110000010A",
    "DE102009046716A1",
    "JP2010045974A",
    "US20110169364A1",
    "JP2011167055A",
    "CN102214962A",
    "JP2011223742A",
    "US20120091845A1",
    "US20120169171A1",
    "CN201910684U"
  ]
}