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1.发明授权Method and device for controlling the speed of the brushless DC motor provided for an electric vehicle 失效用于控制为电动车辆提供的无刷直流电动机的速度的方法和装置
公开(公告)号：US5473725A
公开(公告)日：1995-12-05
申请号：US261540
申请日：1994-06-17
CPC分类号： B60L11/1807 , Y02T10/7005 , Y10S388/91
摘要： The speed of a brushless DC motor driving an electric vehicle is controlled with a speed feedback signal proportional to rotation speed of the motor by processing the back electromotive force (EMF) waves of the brushless DC motor. In this method, the back EMF waves of plural phases are taken to pass the differential amplifiers for each phase, and the back EMF signals in the rising and falling regions of the back EMF waves of each phase are obtained to synthesize, by the commutation signals of a magnetic pole sensor passing the phase detecting circuit, after full-wave rectification and low-pass filtering, a [speed feedback signal. This method differs from normal speed control of a motor, in which a speed feed-back element such as a DC tachometer or an encoder is necessary for controlling the speed. This invention permits the brushless DC motor to control the speed without a feedback element such as a DC tachometer or an encoder, thereby decreasing the cost of the brushless DC motor speed control system.] positive analog voltage is obtained and then maintained or converted to a positive or negative analog voltage by detecting the rotating direction of the motor by the commutation signals, as a speed feedback signal.
摘要翻译： 通过处理无刷直流电动机的反电动势（EMF）波，通过与电动机的转速成比例的速度反馈信号来控制驱动电动车辆的无刷直流电动机的速度。 在该方法中，采用多相的反电动势波通过每相的差分放大器，并且获得每相的反电动势波的上升和下降区中的反EMF信号，以通过换向信号 通过相位检测电路的磁极传感器，在全波整流和低通滤波之后，具有[速度反馈信号]。 该方法与电动机的正常速度控制不同，其中需要诸如直流转速计或编码器的速度反馈元件来控制速度。 本发明允许无刷直流电动机在没有诸如直流转速计或编码器的反馈元件的情况下控制速度，从而降低无刷直流电动机速度控制系统的成本。]获得正模拟电压，然后维持或转换为 通过换向信号检测电动机的旋转方向作为速度反馈信号，可以得到正或负的模拟电压。
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2.发明授权Method and device for limiting electrical current supplied to the motor of an electric vehicle 失效用于限制供应给电动车辆的电动机的电流的方法和装置
公开(公告)号：US5341077A
公开(公告)日：1994-08-23
申请号：US12889
申请日：1993-02-03
CPC分类号： H02H7/0833 , H02H7/0852 , H02H7/0858
摘要： A current limiting device to limit the maximum allowable electric current to be supplied to a motor in driving an electric vehicle. The current limiting device includes (a) a first thermal switch to prevent the power switching element of the motor from being abnormally overheated, (b) a second thermal switch to prevent the motor from being abnormally overheated, and (c) a brake switch. The three switches altogether and in association with a certain hysteresis band work to switch the limits of the electric current passing through the motor between two or more predetermined electric current values. Under normal operating conditions, the limit of the current is set at a high level which is associated with a hysteresis action, and when one of the thermal switches or the brake switch is actuated, the limit of the electric current is switched to a lower value which is still associated with a hysteresis action.
摘要翻译： 限制在驱动电动汽车时供给电动机的最大允许电流的限流装置。 限流装置包括：（a）第一热敏开关，用于防止马达的电源开关元件异常过热，（b）第二热开关，以防止电机异常过热;（c）制动开关。 三个开关一起并且与某个滞后带相关联，用于将通过电动机的电流的极限切换到两个或更多个预定电流值之间。 在正常工作条件下，电流极限被设定在与迟滞动作相关联的高电平，当其中一个热开关或制动开关被致动时，将电流限制切换到较低的值 其仍然与滞后动作相关联。
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公开(公告)号：US5563980A
公开(公告)日：1996-10-08
申请号：US355735
申请日：1994-12-14
申请人： Tshaw-Chuang Chen , Hong-Shi Chang , Huan-Jen Yang
发明人： Tshaw-Chuang Chen , Hong-Shi Chang , Huan-Jen Yang
CPC分类号： H02P6/06 , H02P6/17 , Y10S388/906 , Y10S388/908 , Y10S388/911
摘要： Provided is a brushless DC motor speed controller in which the speed feedback signal needed for speed control is obtained from the commutation signals generated by the magnetic-pole sensor in the brushless DC motor. The-brushless DC motor speed controller includes an edge detector, which generates a pulse each time a rising or falling edge is detected in the signal from the magnetic-pole sensor of the brushless DC motor. A frequency multiplier is used to multiply the frequency of the pulse train from said edge detector. A frequency-to-voltage converter is used to convert the output pulse train from said frequency multiplier into a positive analog voltage, with the level of the positive analog voltage being in proportion to the speed of the brushless DC motor. A motor rotating direction detecting circuit receives the output signal from said magnetic-pole sensor and thereby detects in which direction the brushless DC motor currently rotates. A feedback signal polarity analog multiplexer receives the positive analog voltage from the frequency-to-voltage converter, responsive to the rotating direction detected by said motor rotating direction detecting circuit, thereby generating a positive or a negative analog voltage as speed feedback signal. A speed compensator receives a speed command input and the speed feedback signal and thereby controls the level of the DC voltage supplied to the brushless DC motor.
摘要翻译： 提供一种无刷直流电动机速度控制器，其中由无刷直流电动机中的磁极传感器产生的换向信号获得速度控制所需的速度反馈信号。 无刷直流电动机速度控制器包括边缘检测器，每当在来自无刷直流电动机的磁极传感器的信号中检测到上升沿或下降沿时产生脉冲。 使用倍频器来乘以来自所述边缘检测器的脉冲串的频率。 使用频率 - 电压转换器将来自所述倍频器的输出脉冲串转换成正模拟电压，正模拟电压的电平与无刷直流电动机的速度成比例。 马达旋转方向检测电路接收来自所述磁极传感器的输出信号，从而检测无刷直流马达当前旋转的方向。 反馈信号极性模拟多路复用器响应于由所述电动机旋转方向检测电路检测到的旋转方向，从频率 - 电压转换器接收正模拟电压，从而产生作为速度反馈信号的正或负模拟电压。 速度补偿器接收速度指令输入和速度反馈信号，从而控制提供给无刷直流电动机的直流电压的电平。
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