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公开(公告)号：US20140330470A1
公开(公告)日：2014-11-06
申请号：US14359726
申请日：2012-11-22
Applicant: NTN CORPORATION
Inventor： Takayoshi Ozaki , Koichi Okada , Kenichi Suzuki
IPC: B60L15/20
CPC classification number: B60L15/2072 , B60L1/003 , B60L3/102 , B60L3/108 , B60L7/14 , B60L7/26 , B60L11/1803 , B60L15/2009 , B60L15/2036 , B60L2220/44 , B60L2220/46 , B60L2220/50 , B60L2240/12 , B60L2240/20 , B60L2240/24 , B60L2240/26 , B60L2240/34 , B60L2240/421 , B60L2240/423 , B60L2240/429 , B60L2240/465 , B60L2240/622 , B60L2240/642 , B60L2250/16 , B60L2250/26 , B60L2260/28 , B60L2270/145 , Y02T10/641 , Y02T10/645 , Y02T10/7005 , Y02T10/7275 , Y02T10/7291 , Y02T90/16 , Y02T90/162
Abstract: An angular acceleration monitor may monitor whether or not an angular acceleration of a wheel detected by an angular acceleration detector is equal to or smaller than an acceptable angular acceleration (W) that is calculated with the following formula: W=k1×R×Tt/m/r2 where k1 is a constant, Tt is a total drive torque that is a sum of drive torques of all motor units that drive wheels of the vehicle, m is vehicle mass, r is tire radius, and R is reduction ratio of a reducer unit interposed between the motor unit and the wheel. A slip-responsive controller causes, if it is determined that the acceptable angular acceleration is exceeded, a motor controller to reduce a drive torque of the motor unit(s).
Abstract translation: 角加速度监视器可以监视由角加速度检测器检测到的车轮的角加速度是否等于或小于用下式计算的可接受的角加速度（W）：W = k1×R×Tt / m / r2其中k1是常数，Tt是总驱动扭矩，其是驱动车辆的所有电机单元的驱动扭矩的总和，m是车辆质量，r是轮胎半径，R是减速比 减速器单元插入电动机单元和车轮之间。 如果确定超过可接受的角加速度，则滑动响应控制器导致减小马达单元的驱动扭矩的马达控制器。
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Patent Agency Ranking
公开(公告)号：US09688161B2
公开(公告)日：2017-06-27
申请号：US14978511
申请日：2015-12-22
Applicant: NTN CORPORATION
Inventor： Yingjie Zhang , Koichi Okada , Naoyuki Uchiyama
CPC classification number: B60L15/20 , B60K7/0007 , B60K28/16 , B60K2007/0038 , B60K2007/0092 , B60L7/14 , B60L7/18 , B60L15/2009 , B60L2220/12 , B60L2220/14 , B60L2220/44 , B60L2220/46 , B60L2240/421 , B60L2240/423 , B60W10/08 , B60W2510/082 , Y02T10/645 , Y02T10/7275
Abstract: A slip control device for an electric vehicle which accurately determines slippage occurrence with only a rotation angle sensor for motor rotation control and perform rapid control to eliminate the slippage, is provided. A threshold calculation module (21) calculates a normal angular acceleration of a motor depending on a manipulation amount of an accelerator to obtain a threshold, and an angular acceleration calculator (22) differentiates a detection value from a rotation angle sensor (3a) twice to calculate an angular acceleration. A slip determination (23) determines whether a drive wheel (7) has slipped, and a torque limitation (25) limits a torque when a slippage has occurred. The determination (23) determines the angular acceleration and a threshold. The determination (23) counts a number of consecutive times it is determined that the threshold is exceeded, and determines that a slippage has occurred, if the number of consecutive times has reached a set value. The limitation (25) limits a torque developed by a motor unit for a drive wheel laterally opposite to the drive wheel determined as having slipped.
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公开(公告)号：US09550435B2
公开(公告)日：2017-01-24
申请号：US14359726
申请日：2012-11-22
Applicant: NTN CORPORATION
Inventor： Takayoshi Ozaki , Koichi Okada , Kenichi Suzuki
CPC classification number: B60L15/2072 , B60L1/003 , B60L3/102 , B60L3/108 , B60L7/14 , B60L7/26 , B60L11/1803 , B60L15/2009 , B60L15/2036 , B60L2220/44 , B60L2220/46 , B60L2220/50 , B60L2240/12 , B60L2240/20 , B60L2240/24 , B60L2240/26 , B60L2240/34 , B60L2240/421 , B60L2240/423 , B60L2240/429 , B60L2240/465 , B60L2240/622 , B60L2240/642 , B60L2250/16 , B60L2250/26 , B60L2260/28 , B60L2270/145 , Y02T10/641 , Y02T10/645 , Y02T10/7005 , Y02T10/7275 , Y02T10/7291 , Y02T90/16 , Y02T90/162
Abstract: An angular acceleration monitor may monitor whether or not an angular acceleration of a wheel detected by an angular acceleration detector is equal to or smaller than an acceptable angular acceleration (W) that is calculated with the following formula: W=k1×R×Tt/m/r2 where k1 is a constant, Tt is a total drive torque that is a sum of drive torques of all motor units that drive wheels of the vehicle, m is vehicle mass, r is tire radius, and R is reduction ratio of a reducer unit interposed between the motor unit and the wheel. A slip-responsive controller causes, if it is determined that the acceptable angular acceleration is exceeded, a motor controller to reduce a drive torque of the motor unit(s).
Abstract translation: 角加速度监视器可以监视由角加速度检测器检测到的车轮的角加速度是否等于或小于用下式计算的可接受的角加速度（W）：W = k1×R×Tt / m / r2其中k1是常数，Tt是总驱动扭矩，其是驱动车辆的所有电机单元的驱动扭矩的总和，m是车辆质量，r是轮胎半径，R是减速比 减速器单元插入电动机单元和车轮之间。 如果确定超过可接受的角加速度，则滑动响应控制器导致减小马达单元的驱动扭矩的马达控制器。
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公开(公告)号：US09402336B2
公开(公告)日：2016-07-26
申请号：US14391095
申请日：2013-04-03
Applicant: NTN CORPORATION
Inventor： Minoru Suzuki , Tetsuya Yamamoto , Koichi Okada
IPC: H05K7/20 , H02M7/537 , B60L1/00 , B60L3/00 , B60L11/18 , B60L15/20 , B60K11/02 , B60K7/00 , B60K11/06 , B60K1/00 , B60K1/04
CPC classification number: H05K7/2089 , B60K7/0007 , B60K11/02 , B60K11/06 , B60K2001/003 , B60K2001/0416 , B60K2007/0038 , B60K2007/0092 , B60L1/003 , B60L3/003 , B60L3/0061 , B60L11/1803 , B60L11/1874 , B60L15/2009 , B60L15/2036 , B60L2220/14 , B60L2220/44 , B60L2240/36 , B60L2240/423 , B60L2240/525 , B60L2250/26 , H02M7/537 , H05K7/209 , H05K7/20927 , Y02T10/644 , Y02T10/645 , Y02T10/7005 , Y02T10/705 , Y02T10/7275
Abstract: A cooling structure for an inverter (31) controls a motor (6) to drive an automobile. This inverter device (22) includes a power circuit section (28) having an inverter (31) to convert a DC power of a battery (19) to an AC power for the motor (6), and a casing (39) enclosing the power circuit section (28). A fin (41) is provided in an outer surface of the casing (39), a coolant path (42) for the flow of a cooling medium is provided within the casing (39) or in the outer surface thereof, and a pump (43) circulating the cooling medium in the coolant path (42) is disposed on or in the casing (39). With this structure, the flow resistance for cooling the inverter (31) is reduced to allow the pump (43) to be downsized and a proper cooling can be accomplished to the amount of heat by the inverter (31).
Abstract translation: 逆变器（31）的冷却结构控制电机（6）驱动汽车。 该逆变器装置（22）包括电源电路部（28），具有将电池（19）的直流电力转换为电动机（6）的交流电力的逆变器（31），以及包围 电源电路部分（28）。 在壳体（39）的外表面设置有翅片（41），在壳体（39）内部或其外表面设置用于冷却介质流动的冷却剂路径（42） 在冷却剂路径（42）中使冷却介质循环的循环装置（43）设置在壳体（39）上或壳体（39）中。 通过这种结构，减少用于冷却逆变器（31）的流动阻力，以使泵（43）小型化，并且可以通过逆变器（31）对热量进行适当的冷却。
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公开(公告)号：US09712090B2
公开(公告)日：2017-07-18
申请号：US15267777
申请日：2016-09-16
Applicant: NTN CORPORATION
Inventor： Hiroyuki Yamada , Takeshi Kanda , Koichi Okada
IPC: B60L11/02 , B61C9/38 , H02P5/74 , H02M3/158 , B60K7/00 , B60K17/356 , B60L11/00 , B60L15/00 , B60L15/08 , H02K11/33 , H02K9/00 , H02P27/08 , H02P1/00 , H02P27/04 , H02M7/00 , H02P5/00 , H02M1/00
CPC classification number: H02P5/74 , B60K7/0007 , B60K17/356 , B60K2007/0038 , B60K2007/0092 , B60L11/00 , B60L15/007 , B60L15/08 , B60L2210/14 , B60L2210/44 , B60L2220/44 , B60L2220/46 , B60Y2400/61 , H02K9/00 , H02K11/33 , H02M3/1584 , H02M7/003 , H02M2001/008 , H02P5/00 , H02P27/08 , Y02T10/645 , Y02T10/646
Abstract: A driving device for motors for drive wheels of a vehicle includes a plurality of in-wheel motor assemblies and motor drivers. The motor drivers include a smoothing circuit, an inverter unit to convert the direct current power, inputted through the smoothing circuit, into a three phase alternating current power, an inverter control unit for controlling the inverter unit, and a cooler for cooling the inverter unit. The plurality of the motor drivers are disposed within a single common casing and the plurality of the motor drivers share the smoothing circuit. The inverter control unit of the plurality of the motor drivers is of a control type capable of driving the driving element of the inverter unit according to the PWM scheme and the plurality of the motor drivers have equal cycles of PWM relative to each other and are configured to displace ON and OFF timings of the driving element.
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公开(公告)号：US20150070841A1
公开(公告)日：2015-03-12
申请号：US14391095
申请日：2013-04-03
Applicant: NTN CORPORATION
Inventor： Minoru Suzuki , Tetsuya Yamamoto , Koichi Okada
CPC classification number: H05K7/2089 , B60K7/0007 , B60K11/02 , B60K11/06 , B60K2001/003 , B60K2001/0416 , B60K2007/0038 , B60K2007/0092 , B60L1/003 , B60L3/003 , B60L3/0061 , B60L11/1803 , B60L11/1874 , B60L15/2009 , B60L15/2036 , B60L2220/14 , B60L2220/44 , B60L2240/36 , B60L2240/423 , B60L2240/525 , B60L2250/26 , H02M7/537 , H05K7/209 , H05K7/20927 , Y02T10/644 , Y02T10/645 , Y02T10/7005 , Y02T10/705 , Y02T10/7275
Abstract: A cooling structure for an inverter (31) controls a motor (6) to drive an automobile. This inverter device (22) includes a power circuit section (28) having an inverter (31) to convert a DC power of a battery (19) to an AC power for the motor (6), and a casing (39) enclosing the power circuit section (28). A fin (41) is provided in an outer surface of the casing (39), a coolant path (42) for the flow of a cooling medium is provided within the casing (39) or in the outer surface thereof, and a pump (43) circulating the cooling medium in the coolant path (42) is disposed in the casing (39). With this structure, the flow resistance for cooling the inverter (31) is reduced to allow the pump (43) to be downsized and a proper cooling can be accomplished to the amount of heat by the inverter (31).
Abstract translation: 逆变器（31）的冷却结构控制电机（6）驱动汽车。 该逆变器装置（22）包括电源电路部（28），具有将电池（19）的直流电力转换为电动机（6）的交流电力的逆变器（31），以及包围 电源电路部分（28）。 在壳体（39）的外表面设置有翅片（41），在壳体（39）内部或其外表面设置用于冷却介质流动的冷却剂路径（42）和泵 在冷却剂路径（42）中循环冷却介质的设备（43）设置在壳体（39）中。 通过这种结构，减少用于冷却逆变器（31）的流动阻力，以使泵（43）小型化，并且可以通过逆变器（31）对热量进行适当的冷却。
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