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1. 发明授权

US07915843B2 Motor drive device, method, and cooling device using the same 有权
标题翻译：电机驱动装置，方法和使用其的冷却装置
公开(公告)号：US07915843B2
公开(公告)日：2011-03-29
申请号：US12064311
申请日：2006-08-23
申请人： Tomofumi Mishima , Satoshi Miyajima
发明人： Tomofumi Mishima , Satoshi Miyajima
IPC分类号： H03K5/00
CPC分类号： H03K17/6872 , H02P6/16 , H02P6/26 , H03K17/163
摘要： In the motor drive apparatus, a Hall element outputs a first sinusoidal signal and a second sinusoidal signal, of mutually opposite phases, in accordance with rotor position. A hysteresis comparator compares the first sinusoidal signal and the second sinusoidal signal outputted from the Hall element, and outputs a rectangular wave signal. A pulse width modulation signal generation circuit detects timing at which phase switches, based on the first sinusoidal signal and the second sinusoidal signal outputted from the Hall element, and outputs a pulse width modulation signal in which duty ratio gradually changes, in a predetermined time-period in which the phase switches. A drive circuit combines the rectangular wave signal and the pulse width modulation signal by a logical operation, and drives the fan motor.
摘要翻译：在电机驱动装置中，霍尔元件根据转子位置输出相互相反的相位的第一正弦信号和第二正弦信号。滞后比较器比较从霍尔元件输出的第一正弦信号和第二正弦信号，并输出矩形波信号。脉冲宽度调制信号生成电路基于从霍尔元件输出的第一正弦信号和第二正弦信号，检测相位切换的定时，并输出占空比逐渐变化的脉宽调制信号，相位切换的周期。驱动电路通过逻辑运算来组合矩形波信号和脉宽调制信号，驱动风扇马达。

2. 发明授权

US07796867B2 Motor drive device and cooling device using the same 失效
标题翻译：电机驱动装置和使用其的冷却装置
公开(公告)号：US07796867B2
公开(公告)日：2010-09-14
申请号：US12064389
申请日：2006-08-23
申请人： Satoshi Miyajima , Hiroaki Hayashi , Tomofumi Mishima
发明人： Satoshi Miyajima , Hiroaki Hayashi , Tomofumi Mishima
IPC分类号： H02P7/29
CPC分类号： H02P6/16 , H02P6/26 , H03K2017/0806
摘要： A drive circuit of a fan motor is provided. In an embodiment of the drive circuit, a first PWM comparator compares a temperature detection voltage with a cyclic voltage, and outputs a first PWM signal. A second PWM comparator compares a minimum frequency setting voltage indicating a minimum frequency of the fan motor, with the cyclic voltage, and outputs a second PWM signal. The drive circuit combines the first PWM signal and the second PWM signal by a logical operation, to drive the fan motor. The drive circuit includes a first logic gate which generates a logical sum of the first PWM signal and the second PWM signal, and a second logic gate which generates a logical product of the first PWM signal and an inverted signal of the second PWM signal. The drive circuit switches drive mode based on the first logic gate and the second logic gate.
摘要翻译：提供了一种风扇马达的驱动电路。在驱动电路的实施例中，第一PWM比较器将温度检测电压与循环电压进行比较，并输出第一PWM信号。第二PWM比较器将表示风扇电动机的最小频率的最小频率设定电压与循环电压进行比较，并输出第二PWM信号。驱动电路通过逻辑运算来组合第一PWM信号和第二PWM信号，以驱动风扇电动机。驱动电路包括产生第一PWM信号和第二PWM信号的逻辑和的第一逻辑门和产生第一PWM信号与第二PWM信号的反相信号的逻辑积的第二逻辑门。驱动电路基于第一逻辑门和第二逻辑门来切换驱动模式。

3. 发明申请

US20080315808A1 MOTOR DRIVE DEVICE WITH LOCK PROTECTION FUNCTION 有权
标题翻译：具有锁定功能的电机驱动装置
公开(公告)号：US20080315808A1
公开(公告)日：2008-12-25
申请号：US12101338
申请日：2008-04-11
申请人： Tomofumi Mishima
发明人： Tomofumi Mishima
IPC分类号： H02H7/085
CPC分类号： H02H7/093 , H02H7/0858 , H02P6/14 , H02P29/032
摘要： A cooling system is provided with a motor drive device, a fan motor, and a Hall element. The motor drive device includes a lock protection circuit and a lock controller. When a control signal instructing rotation of the fan motor that is to be driven instructs stoppage of the motor for a predetermined time-period or longer, the lock controller has the lock protection circuit inactive. At an occasion when the control signal has continued to instruct stoppage of the fan motor for a first time-period or longer, a standby controller starts time measurement, and after a further predetermined second time-period has elapsed, makes at least a part of the motor drive device transition to a standby mode.
摘要翻译：冷却系统具有电机驱动装置，风扇马达和霍尔元件。电机驱动装置包括锁定保护电路和锁定控制器。当指示要驱动的风扇电动机的旋转的控制信号指示电动机停止预定时间段或更长时间时，锁定控制器使锁定保护电路不活动。在控制信号持续指示第一时间段以上的风扇电动机的停止的情况下，备用控制器开始时间测量，并且在经过了另外的预定的第二时间段之后，使至少一部分电机驱动装置转换到待机模式。

4. 发明授权

US08093846B2 Motor drive device 有权
标题翻译：电机驱动装置
公开(公告)号：US08093846B2
公开(公告)日：2012-01-10
申请号：US13030334
申请日：2011-02-18
申请人： Tomofumi Mishima , Satoshi Miyajima
发明人： Tomofumi Mishima , Satoshi Miyajima
IPC分类号： H03K5/00
CPC分类号： H03K17/6872 , H02P6/16 , H02P6/26 , H03K17/163
摘要： In the motor drive apparatus, a Hall element outputs a first sinusoidal signal and a second sinusoidal signal, of mutually opposite phases, in accordance with rotor position. A hysteresis comparator compares the first sinusoidal signal and the second sinusoidal signal outputted from the Hall element, and outputs a rectangular wave signal. A pulse width modulation signal generation circuit detects timing at which phase switches, based on the first sinusoidal signal and the second sinusoidal signal outputted from the Hall element, and outputs a pulse width modulation signal in which duty ratio gradually changes, in a predetermined time-period in which the phase switches. A drive circuit combines the rectangular wave signal and the pulse width modulation signal by a logical operation, and drives the fan motor.
摘要翻译：在电机驱动装置中，霍尔元件根据转子位置输出相互相反的相位的第一正弦信号和第二正弦信号。滞后比较器比较从霍尔元件输出的第一正弦信号和第二正弦信号，并输出矩形波信号。脉冲宽度调制信号生成电路基于从霍尔元件输出的第一正弦信号和第二正弦信号，检测相位切换的定时，并输出占空比逐渐变化的脉宽调制信号，相位切换的周期。驱动电路通过逻辑运算来组合矩形波信号和脉宽调制信号，驱动风扇马达。

5. 发明申请

US20110139412A1 MOTOR DRIVE DEVICE 有权
标题翻译：电机驱动装置
公开(公告)号：US20110139412A1
公开(公告)日：2011-06-16
申请号：US13030334
申请日：2011-02-18
申请人： Tomofumi Mishima , Satoshi Miyajima
发明人： Tomofumi Mishima , Satoshi Miyajima
IPC分类号： F24H3/02 , H02P6/16
CPC分类号： H03K17/6872 , H02P6/16 , H02P6/26 , H03K17/163
摘要： In the motor drive apparatus, a Hall element outputs a first sinusoidal signal and a second sinusoidal signal, of mutually opposite phases, in accordance with rotor position. A hysteresis comparator compares the first sinusoidal signal and the second sinusoidal signal outputted from the Hall element, and outputs a rectangular wave signal. A pulse width modulation signal generation circuit detects timing at which phase switches, based on the first sinusoidal signal and the second sinusoidal signal outputted from the Hall element, and outputs a pulse width modulation signal in which duty ratio gradually changes, in a predetermined time-period in which the phase switches. A drive circuit combines the rectangular wave signal and the pulse width modulation signal by a logical operation, and drives the fan motor.
摘要翻译：在电机驱动装置中，霍尔元件根据转子位置输出相互相反的相位的第一正弦信号和第二正弦信号。滞后比较器比较从霍尔元件输出的第一正弦信号和第二正弦信号，并输出矩形波信号。脉冲宽度调制信号生成电路基于从霍尔元件输出的第一正弦信号和第二正弦信号，检测相位切换的定时，并输出占空比逐渐变化的脉宽调制信号，相位切换的周期。驱动电路通过逻辑运算来组合矩形波信号和脉宽调制信号，驱动风扇马达。

6. 发明申请

US20090153084A1 MOTOR DRIVE DEVICE, METHOD, AND COOLING DEVICE USING THE SAME 有权
标题翻译：电机驱动装置，方法和使用该装置的冷却装置
公开(公告)号：US20090153084A1
公开(公告)日：2009-06-18
申请号：US12064311
申请日：2006-08-23
申请人： Tomofumi Mishima , Satoshi Miyajima
发明人： Tomofumi Mishima , Satoshi Miyajima
IPC分类号： H02P6/16 , F04D25/08
CPC分类号： H03K17/6872 , H02P6/16 , H02P6/26 , H03K17/163
摘要： In the motor drive apparatus, a Hall element outputs a first sinusoidal signal and a second sinusoidal signal, of mutually opposite phases, in accordance with rotor position. A hysteresis comparator compares the first sinusoidal signal and the second sinusoidal signal outputted from the Hall element, and outputs a rectangular wave signal. A pulse width modulation signal generation circuit detects timing at which phase switches, based on the first sinusoidal signal and the second sinusoidal signal outputted from the Hall element, and outputs a pulse width modulation signal in which duty ratio gradually changes, in a predetermined time-period in which the phase switches. A drive circuit combines the rectangular wave signal and the pulse width modulation signal by a logical operation, and drives the fan motor.
摘要翻译：在电机驱动装置中，霍尔元件根据转子位置输出相互相反的相位的第一正弦信号和第二正弦信号。滞后比较器比较从霍尔元件输出的第一正弦信号和第二正弦信号，并输出矩形波信号。脉冲宽度调制信号生成电路基于从霍尔元件输出的第一正弦信号和第二正弦信号，检测相位切换的定时，并输出占空比逐渐变化的脉宽调制信号，相位切换的周期。驱动电路通过逻辑运算来组合矩形波信号和脉宽调制信号，驱动风扇马达。

7. 发明授权

US08384325B2 Motor driving circuit and method for driving motor 有权
标题翻译：电机驱动电路及驱动电机的方法
公开(公告)号：US08384325B2
公开(公告)日：2013-02-26
申请号：US12706988
申请日：2010-02-17
申请人： Tomofumi Mishima
发明人： Tomofumi Mishima
IPC分类号： H22P
CPC分类号： H02P1/18 , H02P7/29
摘要： A motor driving circuit receives a control pulse signal pulse-width modulated according to a target rotational speed, and drives a fan motor. A start pulse signal generating unit generates a start pulse signal having a predetermined duty ratio. A driving unit drives the fan motor by pulse width modulation according to the driving pulse signal received from a control unit. When the duty ratio of the control pulse signal is switched from zero to a nonzero value when the fan motor is in the stopped state, the control unit commences the driving operation for the fan motor. The control unit outputs, as the driving pulse signal, the start pulse signal, in a predetermined start period Ts from the commencement of the driving operation. After the start period elapses, the control unit outputs the control pulse signal as the driving pulse signal.
摘要翻译：马达驱动电路接收根据目标转速脉宽调制的控制脉冲信号，驱动风扇马达。起始脉冲信号发生单元产生具有预定占空比的起始脉冲信号。驱动单元根据从控制单元接收的驱动脉冲信号通过脉宽调制来驱动风扇电动机。当风扇电动机处于停止状态时，当控制脉冲信号的占空比从零切换到非零值时，控制单元开始风扇电动机的驱动操作。作为驱动脉冲信号，控制单元在从开始运行的预定开始周期Ts中输出起始脉冲信号。在开始周期过去之后，控制单元输出控制脉冲信号作为驱动脉冲信号。

8. 发明授权

US07885044B2 Motor drive device with lock protection function 有权
标题翻译：电机驱动装置具有锁定保护功能
公开(公告)号：US07885044B2
公开(公告)日：2011-02-08
申请号：US12825782
申请日：2010-06-29
申请人： Tomofumi Mishima
发明人： Tomofumi Mishima
IPC分类号： H02H7/08
CPC分类号： H02H7/093 , H02H7/0858 , H02P6/14 , H02P29/032
摘要： A cooling system is provided with a motor drive device, a fan motor, and a Hall element. The motor drive device includes a lock protection circuit and a lock controller. When a control signal instructing rotation of the fan motor that is to be driven instructs stoppage of the motor for a predetermined time-period or longer, the lock controller has the lock protection circuit inactive. At an occasion when the control signal has continued to instruct stoppage of the fan motor for a first time-period or longer, a standby controller starts time measurement, and after a further predetermined second time-period has elapsed, makes at least a part of the motor drive device transition to a standby mode.
摘要翻译：冷却系统具有电机驱动装置，风扇马达和霍尔元件。电机驱动装置包括锁定保护电路和锁定控制器。当指示要驱动的风扇电动机的旋转的控制信号指示电动机停止预定时间段或更长时间时，锁定控制器使锁定保护电路不活动。在控制信号持续指示第一时间段以上的风扇电动机的停止的情况下，备用控制器开始时间测量，并且在经过了另外的预定的第二时间段之后，使至少一部分电机驱动装置转换到待机模式。

9. 发明申请

US20100264866A1 MOTOR DRIVE DEVICE WITH LOCK PROTECTION FUNCTION 有权
标题翻译：具有锁定功能的电机驱动装置
公开(公告)号：US20100264866A1
公开(公告)日：2010-10-21
申请号：US12825782
申请日：2010-06-29
申请人： Tomofumi MISHIMA
发明人： Tomofumi MISHIMA
IPC分类号： H02H7/085
CPC分类号： H02H7/093 , H02H7/0858 , H02P6/14 , H02P29/032
摘要： A cooling system is provided with a motor drive device, a fan motor, and a Hall element. The motor drive device includes a lock protection circuit and a lock controller. When a control signal instructing rotation of the fan motor that is to be driven instructs stoppage of the motor for a predetermined time-period or longer, the lock controller has the lock protection circuit inactive. At an occasion when the control signal has continued to instruct stoppage of the fan motor for a first time-period or longer, a standby controller starts time measurement, and after a further predetermined second time-period has elapsed, makes at least a part of the motor drive device transition to a standby mode.
摘要翻译：冷却系统具有电机驱动装置，风扇马达和霍尔元件。电机驱动装置包括锁定保护电路和锁定控制器。当指示要驱动的风扇电动机的旋转的控制信号指示电动机停止预定时间段或更长时间时，锁定控制器使锁定保护电路不活动。在控制信号持续指示第一时间段以上的风扇电动机的停止的情况下，备用控制器开始时间测量，并且在经过了另外的预定的第二时间段之后，使至少一部分电机驱动装置转换到待机模式。

10. 发明申请

US20100225263A1 MOTOR DRIVING CIRCUIT AND METHOD FOR DRIVING MOTOR 有权
标题翻译：电动机驱动电路及其驱动方法
公开(公告)号：US20100225263A1
公开(公告)日：2010-09-09
申请号：US12706988
申请日：2010-02-17
申请人： Tomofumi MISHIMA
发明人： Tomofumi MISHIMA
IPC分类号： H02P1/04
CPC分类号： H02P1/18 , H02P7/29
摘要： A motor driving circuit receives a control pulse signal pulse-width modulated according to a target rotational speed, and drives a fan motor. A start pulse signal generating unit generates a start pulse signal having a predetermined duty ratio. A driving unit drives the fan motor by pulse width modulation according to the driving pulse signal received from a control unit. When the duty ratio of the control pulse signal is switched from zero to a nonzero value when the fan motor is in the stopped state, the control unit commences the driving operation for the fan motor. The control unit outputs, as the driving pulse signal, the start pulse signal, in a predetermined start period Ts from the commencement of the driving operation. After the start period elapses, the control unit outputs the control pulse signal as the driving pulse signal.
摘要翻译：马达驱动电路接收根据目标转速脉宽调制的控制脉冲信号，驱动风扇马达。起始脉冲信号发生单元产生具有预定占空比的起始脉冲信号。驱动单元根据从控制单元接收的驱动脉冲信号通过脉宽调制来驱动风扇电动机。当风扇电动机处于停止状态时，当控制脉冲信号的占空比从零切换到非零值时，控制单元开始风扇电动机的驱动操作。作为驱动脉冲信号，控制单元在从开始运行的预定开始周期Ts中输出起始脉冲信号。在开始周期过去之后，控制单元输出控制脉冲信号作为驱动脉冲信号。

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