WO2013097211A1 - 一种带自动补偿的窄脉冲过滤电路及其应用的电机控制器 - Google Patents

一种带自动补偿的窄脉冲过滤电路及其应用的电机控制器 Download PDF

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Publication number
WO2013097211A1
WO2013097211A1 PCT/CN2011/085119 CN2011085119W WO2013097211A1 WO 2013097211 A1 WO2013097211 A1 WO 2013097211A1 CN 2011085119 W CN2011085119 W CN 2011085119W WO 2013097211 A1 WO2013097211 A1 WO 2013097211A1
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WIPO (PCT)
Prior art keywords
filter circuit
circuit
signal
schmitt trigger
narrow pulse
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PCT/CN2011/085119
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English (en)
French (fr)
Inventor
郭跃飞
林洲平
余冲
康俊
程坤
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大洋电机新动力科技有限公司
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Application filed by 大洋电机新动力科技有限公司 filed Critical 大洋电机新动力科技有限公司
Priority to PCT/CN2011/085119 priority Critical patent/WO2013097211A1/zh
Priority to MX2013014530A priority patent/MX341538B/es
Priority to CA2850554A priority patent/CA2850554C/en
Priority to CN201180004461.0A priority patent/CN103444063B/zh
Priority to US13/845,058 priority patent/US9018874B2/en
Publication of WO2013097211A1 publication Critical patent/WO2013097211A1/zh

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/01—Details
    • H03K3/017—Adjustment of width or dutycycle of pulses
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • H02M7/53875—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current with analogue control of three-phase output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/539—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency
    • H02M7/5395—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation

Definitions

  • the invention relates to a narrow pulse filter circuit with automatic compensation and a motor controller for the same.
  • the existing permanent magnet synchronous motor controller includes a P medical signal generator, an inverter unit and a motor body (M), and the motor body (M) includes a permanent magnet rotor, a stator and a winding (U, V). , W), P medical signal generator can be a single-chip MCU or ASIC chip IC, P medical signal generator to generate a pulse signal of a certain width, so that the IGBT of the inverter unit (Ql, Q2, Q3, Q4, Q5, Q6) turns on in turn, causing the windings (U, V, W) to circulate.
  • P medical signal generator can be a single-chip MCU or ASIC chip IC, P medical signal generator to generate a pulse signal of a certain width, so that the IGBT of the inverter unit (Ql, Q2, Q3, Q4, Q5, Q6) turns on in turn, causing the windings (U, V, W) to circulate.
  • the P sensor signal generator ie, the MCU
  • the driving signal of the control IGBT includes narrow pulses, which are for the IGBT.
  • These narrow pulses A are turned off immediately after the IGBT is not fully turned on, which will cause the IGBT to overheat. , affecting the service life, will cause IGBT damage after a long time, severely cause IGBT burnout, and negatively affect the motor control. Therefore, the modulated pulse needs to be processed. Narrow pulses are required to be filtered out, normal pulses are completely passed, and narrow pulse filtering circuits with automatic compensation are designed to achieve these functions.
  • a narrow pulse filter circuit with automatic compensation of the invention is realized by the following technical solutions: A narrow pulse filter circuit with automatic compensation, including signal shaping circuit, filter circuit and pulse width The compensation circuit, the input signal is processed by the signal shaping circuit and sent to the filter circuit, the filter circuit filters out the narrow pulse of the input signal, and the pulse of the input signal is compensated by the pulse width compensation circuit and output.
  • the filter circuit described above is an RC filter circuit, and the signal shaping circuit is a Schmitt trigger.
  • the pulse width compensation circuit includes a Schmitt trigger, a triode, a resistor, a resistor and a capacitor.
  • the input signal processed by the filter circuit is connected to the Schmitt trigger, and the output of the Schmitt trigger outputs an output signal, a capacitor and After the resistors are connected in series, the two ends are respectively connected to the output end of the Schmitt trigger and the ground.
  • the node between the capacitor and the resistor is connected to the base of the triode, the emitter of the triode is grounded, and the collector of the triode is densely connected.
  • the input of the special trigger is provided to the base of the triode, the emitter of the triode is grounded, and the collector of the triode is densely connected.
  • the narrow pulse filter circuit with automatic compensation has the following effects: 1) The narrow pulse of the input signal can be filtered out, and the normal pulse is completely passed, so that the control is more accurate, and the downstream circuit is effectively protected. 2)
  • the filter circuit is an RC filter circuit, the signal shaping circuit is a Schmitt trigger, and the two are matched, the circuit structure is simple, and the effective processing of the narrow pulse is filtered; 3) the pulse width compensation circuit Including Schmitt triggers, triodes, resistors, resistors and capacitors, the circuit structure is single reliable and low in manufacturing cost.
  • Another object of the present invention is to provide a motor controller, which is connected with a narrow pulse filter circuit with automatic compensation between a P medical signal generator and an inverter unit, and a narrow pulse filter circuit with automatic compensation capable of transmitting a P medical signal generator
  • the narrow pulse of the output signal is filtered out, and the normal pulse is completely passed, so that the pulse to the input inverter unit is a normal pulse, which effectively protects the power component IGBT, so that the control is more accurate.
  • a motor controller includes a P medical signal generator and an inverter unit, and a plurality of signal output ends of the P medical signal generator are respectively installed with a narrow pulse filtering circuit with automatic compensation, and a narrow pulse with automatic compensation
  • the output end of the flush filter circuit is connected to the input end of the inverter unit, and the narrow pulse filter circuit with automatic compensation includes a signal shaping circuit, a filter circuit and a pulse width compensation circuit, and the input signal is processed by the signal shaping circuit and sent to the filter circuit for filtering.
  • the circuit filters out the narrow pulse of the input signal, and the pulse of the input signal is compensated by the pulse width compensation circuit and output.
  • the filter circuit described above is an RC filter circuit, and the signal shaping circuit is a Schmitt trigger.
  • the pulse width compensation circuit includes a Schmitt trigger, a triode, a resistor, a resistor and a capacitor.
  • the input signal processed by the filter circuit is connected to the Schmitt trigger, and the output of the Schmitt trigger outputs an output signal, a capacitor and After the resistors are connected in series, the two ends are respectively connected to the output end of the Schmitt trigger and the ground.
  • the node between the capacitor and the resistor is connected to the base of the triode, the emitter of the triode is grounded, and the collector of the triode is densely connected.
  • the input of the special trigger is provided to the base of the triode, the emitter of the triode is grounded, and the collector of the triode is densely connected.
  • the motor controller of the invention has the following effects: 1) accessing a narrow pulse filter circuit with automatic compensation between the P medical signal generator and the inverter unit, and a narrow pulse filter circuit with automatic compensation
  • the narrow pulse of the signal output by the P medical signal generator can be filtered out, and the normal pulse is completely passed, so that the pulse to the input inverter unit is a normal pulse, and the power component IGBT is effectively protected, so that the control is more accurate.
  • the filter circuit is an RC filter circuit
  • the signal shaping circuit is a Schmitt trigger, and the two are matched, the circuit structure is simple, and the effective processing narrow pulse is filtered
  • the pulse width compensation circuit includes Schmidt Trigger, triode, resistor, resistor and capacitor, the circuit structure is reliable and low in manufacturing cost.
  • Figure 1 is a partial block diagram of a conventional motor controller.
  • Figure 2 is a schematic diagram of signals generated by a conventional P medical signal generator.
  • 3 is a schematic block diagram of a narrow pulse filter circuit with automatic compensation according to the present invention.
  • Figure 4 is a corresponding circuit diagram of Figure 3.
  • Figure 5 is a schematic diagram of the principle of the motor controller of the present invention.
  • the narrow pulse filter circuit with automatic compensation includes a signal shaping circuit 1, a filter circuit 2 and a pulse width compensation circuit 3.
  • the input signal is processed by the signal shaping circuit 1 and sent to the filter.
  • the circuit 2, the filter circuit 2 filters out the narrow pulse of the input signal, and the pulse of the input signal is compensated and output by the pulse width compensation circuit 3.
  • the signal shaping circuit 1 is a Schmitt trigger IC1A and a resistor R1, and a resistor R1.
  • the circuit 3 includes a Schmitt trigger IC1B, a transistor Q1, a resistor R3, a resistor R4 and a capacitor C2.
  • the input signal processed by the filter circuit 2 is connected to the Schmitt trigger IC1B, and the output of the Schmitt trigger IC1B is output.
  • the signal, capacitor C2 and resistor R4 are connected in series, and the two ends are respectively connected to the output end of the Schmitt trigger IC1B and the ground terminal, the capacitor C2 and the resistor.
  • the node connection between R4 is connected to the base of the transistor Q2 after the resistor R3, the emitter of the transistor Q2 is grounded, the collector of the transistor Q2 is connected to the input terminal of the Schmitt trigger IC1B, and the resistor R2 is connected to the Schmitt trigger IC1A. Between the output end and the input end of the Schmitt trigger IC1B, one end of the capacitor C1 is connected between the resistor R2 and the input end of the Schmitt trigger IC1B, and the other end of the capacitor C1 is grounded.
  • the driving input signal enters from position 1 to position 1, and reaches position 2 after shaping and anti-interference processing by resistor R1 and Schmitt trigger IC1A, assuming that The drive signal pulse width is T 1; the resistor R2 and the capacitor C1 form a narrow pulse filter circuit, which filters the circuit The width of the filter pulse is T1, so the pulse width when the drive input signal reaches position 3 is ⁇ 1. If ⁇ 1 T1 0, the narrow pulse is fully absorbed, and the Schmitt trigger IC1B outputs a low level, that is, the position 4 is low.
  • the pulse is not fully absorbed, and the Schmitt trigger IC1B outputs a low level. That is, the position 4 is high level, and the transistor Q1 is turned on in the inverter, and the compensation circuit composed of the transistor Q1, the capacitor C2, the resistor R3 and the resistor R4 compensates the pulse, and the pulse width compensated by the compensation circuit is T2, then The total width of the compensated pulse is 11 + T2.
  • the narrow pulse is less than the minimum pulse width T1, assuming 3 microseconds, assuming the input signal contains a narrow pulse width of only 2 microseconds, which will be filtered out; if the input signal has a pulse of 3.5 microsecond width, 3.5 microseconds Pulses of width are reserved for output.
  • the motor controller of the present invention comprises a P medical signal generator and an inverter unit, and a plurality of signal output ends of the P medical signal generator are respectively installed with narrow pulse filtering with automatic compensation.
  • the output end of the narrow pulse filter circuit with automatic compensation is connected to the input end of the inverter unit, and the narrow pulse filter circuit with automatic compensation includes a signal shaping circuit 1, a filter circuit 2 and a pulse width compensation circuit 3, and the input signal passes the signal After the shaping circuit 1 processes, it is sent to the filter circuit 2.
  • the filter circuit 2 filters out the narrow pulse of the input signal, and the pulse of the input signal is compensated by the pulse width compensation circuit 3, and the signal shaping circuit 1 is a Schmitt trigger.
  • resistor R1 are respectively connected between the input end of the Schmitt trigger IC1A and the ground, the input signal is connected to the input end of the Schmitt trigger IC1A, and the filter circuit 2 is an RC filter circuit, including the resistor R2 And capacitor C1, pulse width compensation circuit 3 Including Schmitt trigger IC1B, transistor Ql, resistor R3, resistor R4 and capacitor C2, the input signal processed by the filter circuit 2 is connected to the Schmitt trigger IC1B, and the output of the Schmitt trigger IC1B will output a signal.
  • the capacitor C2 and the resistor R4 are connected in series, and the two ends are respectively connected to the output end of the Schmitt trigger IC1B and the ground terminal.
  • the node between the capacitor C2 and the resistor R4 is connected to the resistor R3 and then connected to the base of the transistor Q2, and the transistor Q2 is emitted.
  • the pole is grounded, the collector of the transistor Q2 is connected to the input end of the Schmitt trigger IC1B, and the resistor R2 is connected between the output end of the Schmitt trigger IC1A and the input end of the Schmitt trigger IC1B, and one end of the capacitor C1 is connected Between the resistor R2 and the input of the Schmitt trigger IC1B, the other end of the capacitor C1 is grounded.
  • a narrow pulse filter circuit with automatic compensation is connected between the P medical signal generator and the inverter unit, and a narrow pulse filter circuit with automatic compensation can filter the narrow pulse of the signal output by the P medical signal generator, the normal pulse Then the complete pass, so that the pulse input to the inverter unit is a normal pulse, effectively protecting the power component IGBT, so that the control is more accurate.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)
  • Inverter Devices (AREA)
  • Control Of Electric Motors In General (AREA)
  • External Artificial Organs (AREA)

Abstract

一种带自动补偿的窄脉冲过滤电路及其应用的电机控制器。该电机控制器包括PWM信号发生器和逆变器单元，PWM信号发生器的多个信号输出端都分别安装带自动补偿的窄脉冲过滤电路，带自动补偿的窄脉冲过滤电路的输出端连接逆变器单元的输入端。带自动补偿的窄脉冲过滤电路包括信号整形电路（1）、过滤电路（2）和脉冲宽度补偿电路（3），输入信号经过信号整形电路（1）处理后送到过滤电路（2），过滤电路（2）将输入信号的窄脉冲过滤掉，输入信号的宽脉冲经过脉冲宽度补偿电路（3）补偿后输出。通过在PWM信号发生器与逆变器单元之间连接带自动补偿的窄脉冲过滤电路，能够将PWM信号发生器输出的信号中的窄脉冲过滤掉，正常脉冲则完整通过，使输入到逆变器单元的脉冲都为正常脉冲，有效保护功率元件IGBT，使控制更加精确。

Description

一种带自动补偿的窄脉沖过滤电路及其应用的电机控制器 技术领域：
本发明涉及一种带自动补偿的窄脉沖过滤电路及其应用的电机控制器。
背景技术：
如图 1所示， 现有的永磁同步电机控制器包括 P醫信号发生器、 逆变器单 元和电机本体（M ), 电机本体（M ) 包括永磁转子、 定子和绕组（U、 V、 W ), P醫 信号发生器可以单片机 MCU或专用集成电路芯片 IC, P醫信号发生器产生一定 宽度的脉沖信号， 从而使逆变器单元的 IGBT ( Ql、 Q2、 Q3、 Q4、 Q5、 Q6 )轮流 导通， 从而使绕组（U、 V、 W )轮流通电。
现有的电机控制器在处理过程中， P醫信号发生器（即单片机 MCU )通过软 件调制解调计算出的控制 IGBT 的驱动信号中包含有窄脉沖， 这些窄脉沖对于 IGBT来说， 起着负面效果， 如图 2所示， 在 P醫信号发生器产生正常的驱动脉 沖 B以前， 会产生个窄脉沖 A, 这些窄脉沖 A还没有完全打开 IGBT就马上关闭， 这样一来会造成 IGBT过热， 影响使用寿命， 长时间后就会引起 IGBT损坏， 严 重的会造成 IGBT烧毁， 而且给电机控制造成负面影响。 所以需要对调制过来的 脉沖进行处理。 要求窄脉沖被过滤掉， 正常脉沖则完整通过， 带自动补偿的窄 脉沖过滤电路正是为实现这些功能而设计的。
发明内容：
本发明的一个目的是提供带自动补偿的窄脉沖过滤电路， 能够将输入信号 的窄脉沖被过滤掉， 正常脉沖则完整通过。
本发明带自动补偿的窄脉沖过滤电路是通过下述技术方案予以实现的： 一种带自动补偿的窄脉沖过滤电路， 包括信号整形电路、 过滤电路和脉沖宽度 补偿电路， 输入信号经过信号整形电路处理后送到过滤电路， 过滤电路将输入 信号的窄脉沖过滤掉， 输入信号的款脉沖经过脉沖宽度补偿电路补偿后输出。
上述所述的过滤电路是 RC过滤电路， 所述的信号整形电路是施密特触发 器。
上述的脉沖宽度补偿电路包括施密特触发器、 三极管、 电阻、 电阻和电容， 经过过滤电路处理后的输入信号连接施密特触发器， 施密特触发器的输出端将 输出信号， 电容和电阻串联后两端分别连接在施密特触发器的输出端和接地端， 电容和电阻之间的节点连接电阻后与三极管的基极连接， 三极管的发射极接地， 三极管的集电极连接施密特触发器的输入端。
本发明带自动补偿的窄脉沖过滤电路与现有技术相比， 具有如下效果： 1 ) 能够将输入信号的窄脉沖被过滤掉， 正常脉沖则完整通过， 使控制更加准确， 有效保护下游电路的电子元器件； 2 )过滤电路是 RC过滤电路， 所述的信号整 形电路是施密特触发器， 两者配合， 电路结构筒单合理， 有效处理窄脉沖被过 滤掉； 3 )脉沖宽度补偿电路包括施密特触发器、 三极管、 电阻、 电阻和电容， 电路结构筒单可靠， 制造成本低。
本发明的另一个目的是提供电机控制器， 在 P醫信号发生器与逆变器单元 之间接入带自动补偿的窄脉沖过滤电路， 带自动补偿的窄脉沖过滤电路能够将 P醫信号发生器输出的信号中窄脉沖被过滤掉， 正常脉沖则完整通过， 使到输入 逆变器单元的脉沖都为正常脉沖，有效保护功率元件 IGBT,使到控制更加精确。
本发明的电机控制器是通过下述技术方案予以实现的：
一种电机控制器， 包括 P醫信号发生器和逆变器单元， P醫信号发生器的 多个信号输出端都分别安装带自动补偿的窄脉沖过滤电路， 带自动补偿的窄脉 沖过滤电路的输出端连接逆变器单元的输入端， 带自动补偿的窄脉沖过滤电路 包括信号整形电路、 过滤电路和脉沖宽度补偿电路， 输入信号经过信号整形电 路处理后送到过滤电路， 过滤电路将输入信号的窄脉沖过滤掉， 输入信号的款 脉沖经过脉沖宽度补偿电路补偿后输出。
上述所述的过滤电路是 RC过滤电路， 所述的信号整形电路是施密特触发 器。
上述的脉沖宽度补偿电路包括施密特触发器、 三极管、 电阻、 电阻和电容, 经过过滤电路处理后的输入信号连接施密特触发器， 施密特触发器的输出端将 输出信号， 电容和电阻串联后两端分别连接在施密特触发器的输出端和接地端， 电容和电阻之间的节点连接电阻后与三极管的基极连接， 三极管的发射极接地， 三极管的集电极连接施密特触发器的输入端。
本发明的电机控制器与现有技术相比， 具有如下效果： 1 )在 P醫信号发生 器与逆变器单元之间接入带自动补偿的窄脉沖过滤电路， 带自动补偿的窄脉沖 过滤电路能够将 P醫信号发生器输出的信号中窄脉沖被过滤掉， 正常脉沖则完 整通过， 使到输入逆变器单元的脉沖都为正常脉沖， 有效保护功率元件 IGBT, 使到控制更加精确。 2) 过滤电路是 RC过滤电路， 所述的信号整形电路是施密 特触发器， 两者配合， 电路结构筒单合理， 有效处理窄脉沖被过滤掉； 3 )脉沖 宽度补偿电路包括施密特触发器、 三极管、 电阻、 电阻和电容， 电路结构筒单 可靠， 制造成本低。
附图说明：
图 1 是传统电机控制器的部分原理框图。
图 2 是传统 P醫信号发生器产生的信号示意图。 图 3 是本发明的带自动补偿的窄脉沖过滤电路的原理框图。
图 4 是图 3的对应的电路图。
图 5 是本发明的电机控制器的原理示意图。
具体实施方式：
下面通过具体实施例并结合附图对本发明作进一步详细的描述。
如图 3、 图 4所示， 本发明一种带自动补偿的窄脉沖过滤电路， 包括信号整 形电路 1、 过滤电路 2和脉沖宽度补偿电路 3 , 输入信号经过信号整形电路 1处 理后送到过滤电路 2 , 过滤电路 2将输入信号的窄脉沖过滤掉， 输入信号的款脉 沖经过脉沖宽度补偿电路 3补偿后输出， 所述的信号整形电路 1是施密特触发 器 IC1A和电阻 R1 ,电阻 R1分别连接在施密特触发器 IC1A的输入端与地之之间， 输入信号连接在施密特触发器 IC1A的输入端， 过滤电路 2是 RC过滤电路， 包 括电阻 R2和电容 C1，脉沖宽度补偿电路 3包括施密特触发器 IC1B、 三极管 Ql、 电阻 R3、 电阻 R4和电容 C2 , 经过过滤电路 2处理后的输入信号连接施密特触 发器 IC1B,施密特触发器 IC1B的输出端将输出信号， 电容 C2和电阻 R4串联后 两端分别连接在施密特触发器 IC1B的输出端和接地端， 电容 C2和电阻 R4之间 的节点连接电阻 R3后与三极管 Q2的基极连接， 三极管 Q2的发射极接地， 三极 管 Q2的集电极连接施密特触发器 IC1B的输入端，电阻 R2连接在施密特触发器 IC1A的输出端与施密特触发器 IC1B的输入端之间， 电容 C1一端连接在电阻 R2 与施密特触发器 IC1B的输入端之间， 电容 C1另一端接地。
本发明的原理是： 如图 3和图 4所示， 驱动输入信号从 IN端进入到位置 1， 经过电阻 R1和施密特触发器 IC1A整形和抗干扰处理后达到位置 2， 假设此时的 驱动信号脉冲宽度为 T1; 电阻 R2和电容 C1组成窄脉冲过滤电路， 它过滤电路过 滤脉冲的宽度为 Tl， 所以驱动输入信号到达位置 3时的脉冲宽度为 ^一1 。 若^ 一 T1 0时， 窄脉冲被全部吸收， 施密特触发器 IC1B输出低电平， 即位置 4为低 电平。 若 Ί^—Π Χ)时， 脉冲未被全部吸收， 施密特触发器 IC1B输出低高电平。 即位置 4为高电平， 反相器中三极管 Q1导通， 通过三极管 Ql、 电容 C2、 电阻 R3 和电阻 R4组成的补偿电路对脉冲进行补偿， 设补偿电路补偿的脉冲宽度为 T2 , 则经过补偿后的脉冲总宽度为 一11+ T2, 由于要满足输出端 OUT的信号的脉冲 宽度 TozT 故需要 T1 =T2， 而这一点是可以通过设定电阻 R2、 电容 Cl、 电容 C2、 电阻 R3和电阻 R4值来得到的， 所以通过补偿电路后使 1^= ， 即脉冲宽度超过 最小脉冲宽度后， 将原封不动的输出。 这样就达到了去掉了有危害的宽度较窄 的脉冲而保留了没有危害且有驱动能力的脉冲， 最终达到防止 IGBT过热和保护 IGBT的目的。 例如， 窄脉冲都小于最小脉冲宽度 T1 , 假设为 3微秒， 假设输入 信号含有的窄脉冲宽度只有 2微秒， 那将被过滤掉； 若输入信号有 3.5微秒宽度 的脉冲， 3.5微秒宽度的脉冲被保留输出。
如图 3、 图 4、 图 5所示， 本发明电机控制器包括 P醫信号发生器和逆变器 单元， P醫信号发生器的多个信号输出端都分别安装带自动补偿的窄脉沖过滤 电路， 带自动补偿的窄脉沖过滤电路的输出端连接逆变器单元的输入端， 带自 动补偿的窄脉沖过滤电路包括信号整形电路 1、过滤电路 2和脉沖宽度补偿电路 3 , 输入信号经过信号整形电路 1处理后送到过滤电路 2 , 过滤电路 2将输入信 号的窄脉沖过滤掉， 输入信号的款脉沖经过脉沖宽度补偿电路 3补偿后输出所 述的信号整形电路 1是施密特触发器 IC1A和电阻 R1 , 电阻 R1分别连接在施密 特触发器 IC1A的输入端与地之之间， 输入信号连接在施密特触发器 IC1A的输 入端， 过滤电路 2是 RC过滤电路， 包括电阻 R2和电容 C1，脉沖宽度补偿电路 3 包括施密特触发器 IC1B、 三极管 Ql、 电阻 R3、 电阻 R4和电容 C2 , 经过过滤电 路 2处理后的输入信号连接施密特触发器 IC1B,施密特触发器 IC1B的输出端将 输出信号， 电容 C2和电阻 R4串联后两端分别连接在施密特触发器 IC1B的输出 端和接地端， 电容 C2和电阻 R4之间的节点连接电阻 R3后与三极管 Q2的基极 连接， 三极管 Q2的发射极接地， 三极管 Q2的集电极连接施密特触发器 IC1B的 输入端，电阻 R2连接在施密特触发器 IC1A的输出端与施密特触发器 IC1B的输 入端之间， 电容 C1一端连接在电阻 R2与施密特触发器 IC1B的输入端之间， 电 容 C1另一端接地。
在 P醫信号发生器与逆变器单元之间接入带自动补偿的窄脉沖过滤电路， 带自动补偿的窄脉沖过滤电路能够将 P醫信号发生器输出的信号中窄脉沖被过 滤掉， 正常脉沖则完整通过， 使到输入逆变器单元的脉沖都为正常脉沖， 有效 保护功率元件 IGBT, 使到控制更加精确。

Claims

权利要求书
1、 一种带自动补偿的窄脉沖过滤电路， 包括信号整形电路（1)、 过滤电路 ( 2 )和脉沖宽度补偿电路（ 3 ), 输入信号经过信号整形电路 ( 1 )处理后送到 过滤电路（ 2 ), 过滤电路（ 2 )将输入信号的窄脉沖过滤掉， 输入信号的款脉沖 经过脉沖宽度补偿电路（ 3 )补偿后输出。
2、 根据权利要求 1所述的一种带自动补偿的窄脉沖过滤电路，其特征在于： 过滤电路（ 2 )是 RC过滤电路。
3、 根据权利要求 1或 2所述的一种带自动补偿的窄脉沖过滤电路， 其特征 在于：所述的信号整形电路（ 1 )是施密特触发器（ IC1A )。
4、 根据权利要求 3所述的一种带自动补偿的窄脉沖过滤电路，其特征在于： 脉沖宽度补偿电路（3) 包括施密特触发器（ IC1B)、 三极管 （Ql)、 电阻（R3)、 电阻（ R4 )和电容（ C2 ), 经过过滤电路（ 2 )处理后的输入信号连接施密特触 发器（IC1B), 施密特触发器（IC1B) 的输出端将输出信号， 电容（C2)和电阻 (R4) 串联后两端分别连接在施密特触发器（IC1B) 的输出端和接地端， 电容 (C2)和电阻（R 之间的节点连接电阻 3)后与三极管 （Q1 ) 的基极连接， 三极管 （Q1 ) 的发射极接地， 三极管 （Q1 ) 的集电极连接施密特触发器（IC1B) 的输入端。
5、 一种应用权利要求 1至 4任何一项带自动补偿的窄脉沖过滤电路的电机 控制器， 包括 P醫信号发生器和逆变器单元， 其特征在于： P醫信号发生器的多 个信号输出端都分别安装带自动补偿的窄脉沖过滤电路， 带自动补偿的窄脉沖 过滤电路的输出端连接逆变器单元的输入端， 带自动补偿的窄脉沖过滤电路包 括信号整形电路（ 1；)、 过滤电路（ 2 )和脉沖宽度补偿电路（ 3 ), 输入信号经过 信号整形电路（ 1 )处理后送到过滤电路（ 2 ), 过滤电路（ 2 )将输入信号的窄 脉沖过滤掉， 输入信号的款脉沖经过脉沖宽度补偿电路（3)补偿后输出。
6、 根据权利要求 5所述的电机控制器， 其特征在于：所述的过滤电路（2) 是 RC过滤电路。
7、 根据权利要求 5或 6所述的电机控制器， 其特征在于： 所述的信号整形 电路（ 1 )是施密特触发器（ IC1A )。
8、 根据权利要求 7所述的电机控制器，其特征在于： 脉沖宽度补偿电路（3) 包括施密特触发器（ IC1B)、 三极管（Ql)、 电阻 3)、 电阻（R 和电容（C2), 经过过滤电路（2)处理后的输入信号连接施密特触发器（IC1B), 施密特触发 器（IC1B) 的输出端将输出信号， 电容（C2)和电阻（R4) 串联后两端分别连 接在施密特触发器（IC1B) 的输出端和接地端， 电容（C2)和电阻（R 之间 的节点连接电阻 3)后与三极管 （Q1 ) 的基极连接， 三极管 （Q1 ) 的发射极 接地， 三极管 （Q1 ) 的集电极连接施密特触发器（IC1B) 的输入端。
PCT/CN2011/085119 2011-12-31 2011-12-31 一种带自动补偿的窄脉冲过滤电路及其应用的电机控制器 WO2013097211A1 (zh)

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