公开(公告)号：US5877602A

公开(公告)日：1999-03-02

申请号：US925431

申请日：1997-09-08

申请人： Shunichi Kondoh ,  Toshiya Suzuki

发明人： Shunichi Kondoh ,  Toshiya Suzuki

IPC分类号： H02P6/08 ,  H02P6/18 ,  H02K23/00

CPC分类号： H02P6/085 ,  H02P6/182 ,  H02P2209/07

摘要： A sensorless brushless motor driving circuit for a motor having three phases includes a position detecting circuit for detecting the position of the rotor from the terminal voltages of the motor, a commutation switching circuit for generating commutation switching signals based on a position signal from the position detecting circuit, a motor driving transistor circuit for supplying a motor driving currents to the motor in response to driving signals, a buffer circuit for supplying the driving signals according to the commutation switching signals, and a neutral feedback amplifier for detecting a neutral potential of terminal voltages of the motor, comparing the neutral potential with a reference voltage, outputting a first output to the buffer circuit when the neutral potential of the terminal voltages of the motor is higher than the reference voltage and outputting a second output to the buffer circuit when the neutral potential of the terminal voltages of the motor is lower than the reference voltage.

摘要翻译： 一种用于具有三相电动机的无传感器无刷电动机驱动电路，包括位置检测电路，用于根据电动机的端子电压检测转子的位置;换向切换电路，用于根据来自位置检测的位置信号产生换相切换信号 电路，用于响应于驱动信号向电动机提供电动机驱动电流的电动机驱动晶体管电路，用于根据换向开关信号提供驱动信号的缓冲电路和用于检测端电压的中性电位的中性反馈放大器 将所述中性电位与参考电压进行比较，当所述电动机的端子电压的中性电位高于所述参考电压时，将第一输出输出到所述缓冲电路，并且当所述中性点 电机的端子电压的电位低于 参考电压。

公开(公告)号：US06242875B1

公开(公告)日：2001-06-05

申请号：US09434447

申请日：1999-11-05

申请人： Satoshi Kusaka ,  Shunichi Kondoh

发明人： Satoshi Kusaka ,  Shunichi Kondoh

IPC分类号： H02K2300

CPC分类号： H02P6/085 ,  H02P6/14 ,  H02P6/182 ,  H02P2209/07

摘要： An object is to realize acoustic noise reduction under a wide range of rotating speeds and together with PWM control. A signal (VCTL1) is generated as a trapezoidal wave repeatedly rising and falling in each given electrical angle section extending before and after the current-supply pattern is switched in accordance with the electrical angle of a rotor of a motor, and a signal (VCTL2) is generated in the opposite phase. A control circuit (22) appropriately selects among the signals (VCTL1 and VCTL2) and a given signal (SCTL) and inputs them to comparators (59 to 61). The comparators (59 to 61) compare the input signals with a carrier signal (B6) provided as a triangular wave. Switch elements for controlling the current-supply pattern to the motor turn on/off on the basis of output signals (C1 to C6) from the comparators (59 to 61). As a result, the current-supply pattern is switched softly by PWM control in the electrical angle section mentioned above.

摘要翻译： 目的是在宽的旋转速度范围内实现声音降噪，并与PWM控制一起实现。 产生信号（VCTL1），作为在根据电动机的转子的电角度切换电流供给模式之前和之后的每个给定电角度部分中重复上升和下降的梯形波，以及信号（VCTL2） ）在相反的阶段产生。 控制电路（22）适当地选择信号（VCTL1和VCTL2）和给定信号（SCTL），并将它们输入到比较器（59至61）。 比较器（59至61）将输入信号与作为三角波提供的载波信号（B6）进行比较。 基于来自比较器（59至61）的输出信号（C1至C6），用于控制电动机电流模式的开关元件接通/断开。 结果，通过上述电角度部分中的PWM控制，电流供应模式被轻松切换。

公开(公告)号：US5374880A

公开(公告)日：1994-12-20

申请号：US223220

申请日：1994-04-05

申请人： Shunichi Kondoh ,  Satoshi Kusaka

发明人： Shunichi Kondoh ,  Satoshi Kusaka

IPC分类号： H02P6/08 ,  H02P6/18 ,  H02P6/02

CPC分类号： H02P6/182 ,  H02P6/085

摘要： It is an object to enable efficient driving even if the rotation speed is variable in a driving circuit for a DC brushless motor having no position detection. The counterelectromotive force of the motor M is received by the comparators (201-203) and the trigger signals (G1 and G2) are outputted with 120.degree. cycle in synchronization with the rotation. Two oscillation signals (N1 and N2) in synchronization with the rotation of the motor are generated therefrom and a serial control signal (CNT) which becomes active/inactive for every 30.degree. is further produced in the 30.degree. signal operation circuit (104). The control signal (CNT) is serial/parallel converted into conversion control signals (L1-L3) in the 180.degree. signal conversion circuit (105). The 120.degree. switching circuit (1116) further converts them into driving signals (K1-K6) and applies them to the current control portion (300). The motor is driven by a signal delayed by a rotation angle of 30.degree. not according to the number of rotation of the motor.

摘要翻译： 即使在没有位置检测的直流无刷电动机的驱动电路中转速是可变的，也可以实现有效驾驶。 电动机M的反电动势由比较器（201-203）接收，触发信号（G1和G2）以与旋转同步的120°循环输出。 产生与电机旋转同步的两个振荡信号（N1和N2），并在30°信号运算电路（104）中进一步产生每30°变为有效/无效的串行控制信号（CNT）。 控制信号（CNT）在180°信号转换电路（105）中串行/并行转换成转换控制信号（L1-L3）。 120°切换电路（1116）进一步将它们转换为驱动信号（K1-K6）并将其施加到电流控制部分（300）。 电机由延迟30°旋转角度的信号驱动，而不是根据电机的转动次数。

公开(公告)号：US06404976B1

公开(公告)日：2002-06-11

申请号：US09204165

申请日：1998-12-03

申请人： Shunichi Kondoh

发明人： Shunichi Kondoh

IPC分类号： H04N591

CPC分类号： G11B27/324 ,  G11B2220/90 ,  G11B2220/91

摘要： Comparators receiving reference voltages are provided. An output signal from a differential amplifier is applied to these comparators. Here, the relationship of Vref1>Vref2>Vref3>Vref4>Vref5>Vbias>Vref6>Vref7>Vref8>Vref9>Vref10 is established. The output signals from the comparators are applied to a data latch/threshold level select circuit. The select circuit retains the maximum peak level of the prior comparison by the comparators, and retains the minimum peak value of the prior comparison by the comparators. The select circuit selects the output signal of the comparator of one lower level than the comparator that detects the maximum peak level at the prior comparison to supply the selected signal to a RS flip-flop circuit, and selects the output signal of the comparator of one higher level than the comparator that detects the minimum peak level at the prior comparison to supply the selected signal to the RS flip-flop circuit. The RS flip-flop circuit outputs a detection signal of a VISS signal in response to these select signals. As a result, a VISS signal detection circuit can reliably detect only the VISS signal without detecting the erase noise.

摘要翻译： 提供接收参考电压的比较器。 来自差分放大器的输出信号被施加到这些比较器。 这里，建立Vref1> Vref2> Vref3> Vref4> Vref5> Vbias> Vref6> Vref7> Vref8> Vref9> Vref10的关系。 来自比较器的输出信号被施加到数据锁存/阈值电平选择电路。 选择电路通过比较器保留先前比较的最大峰值电平，并保留比较器的先前比较的最小峰值。 选择电路选择比先前比较时检测最大峰值电平的比较器低一个比较器的输出信号，将所选信号提供给RS触发器电路，并选择比较器的输出信号 高于比较器，该比较器检测在先前比较的最小峰值电平，以将所选择的信号提供给RS触发器电路。 RS触发器电路响应于这些选择信号输出VISS信号的检测信号。 结果，VISS信号检测电路只能可靠地检测VISS信号而不检测擦除噪声。

公开(公告)号：US5939850A

公开(公告)日：1999-08-17

申请号：US132074

申请日：1998-08-10

申请人： Shunichi Kondoh

发明人： Shunichi Kondoh

IPC分类号： H02H7/00 ,  H02H7/08 ,  H02P6/00 ,  H02P6/12 ,  H02P27/06 ,  H02P6/24

CPC分类号： H02H7/0833 ,  H02P6/34 ,  Y10S388/903

摘要： A circuit for driving a three-phase brushless DC motor (301) includes a neutral point feedback circuit (201) which operates a three-phase output circuit (202) so that a neutral point potential (V.sub.C) of the motor (301) is maintained at a predetermined potential, and a neutral point potential comparison circuit (500) which determines whether or not the neutral point potential (V.sub.C) is between reference potentials (V.sub.ref1, V.sub.ref2). If the neutral point potential (V.sub.C) is not between the reference potentials (V.sub.ref1, V.sub.ref2), a switch shutoff signal (SC) is activated to turn off a switch (106), so that a current (I.sub.C) is not provided to the neutral point feedback circuit (201). Accordingly, the neutral point feedback circuit (201) stops flowing currents (I.sub.A, I.sub.B) to the three-phase output circuit (202) which in turn stops driving the motor (301). The circuit for driving the motor (301) is prevented from being broken down if a short circuit occurs in the motor (301).

摘要翻译： 用于驱动三相无刷直流电动机（301）的电路包括中性点反馈电路（201），其操作三相输出电路（202），使得电动机（301）的中性点电位（VC）为 维持在预定电位，以及中性点电位比较电路（500），其确定中性点电位（VC）是否在参考电位（Vref1，Vref2）之间。 如果中性点电位（VC）不在参考电位（Vref1，Vref2）之间，则开关切断信号（SC）被激活以关闭开关（106），使得电流（IC）不被提供给 中性点反馈电路（201）。 因此，中性点反馈电路（201）停止向三相输出电路（202）的流动电流（IA，IB），继电器驱动马达（301）。 如果电动机（301）发生短路，则防止用于驱动电动机（301）的电路被分解。