CN1372376A - 电磁驱动电路 - Google Patents

电磁驱动电路 Download PDF

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CN1372376A
CN1372376A CN02104799A CN02104799A CN1372376A CN 1372376 A CN1372376 A CN 1372376A CN 02104799 A CN02104799 A CN 02104799A CN 02104799 A CN02104799 A CN 02104799A CN 1372376 A CN1372376 A CN 1372376A
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solenoid
current
voltage
current value
temperature
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CN1235332C (zh
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江原孝幸
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MEKERS CORP
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MEKERS CORP
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B26D5/086—Electric, magnetic, piezoelectric, electro-magnetic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • H01F7/1844—Monitoring or fail-safe circuits

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Control Of Electrical Variables (AREA)
  • Magnetically Actuated Valves (AREA)
  • Electronic Switches (AREA)
  • Feedback Control In General (AREA)

Abstract

一种电磁驱动电路,设有:从开关电路2向螺线管3施加小于起动阀值的微弱电压的空载控制部6;根据施加电压和流经螺线管的电流值算出螺线管电阻值的运算部7;按照求得的电阻值来控制电磁驱动电压,使流经螺线管3的电流值保持恒定的恒流控制部8。无论螺线管的线圈温度如何,都使电磁驱动时的供给电流保持恒定,解决了由温度引起的工作特性的变化。

Description

电磁驱动电路
技术领域
本发明涉及一种电磁驱动电路，特别是涉及一种为了修正因温度变化而引起的螺线管特性变化所构成的电磁驱动电路。
背景技术
螺线管的电阻值会随着线圈温度成比例变化，如果线圈温度伴随通电时间及通电电流值上升，则电阻增大。如果电阻增大，则即使施加相同的电压，也会因流过线圈的电流下降而导致吸引力降低，从而使传动装置的动作速度下降。另外，在比规定温度低时，流经螺线管的电流过量，与高温时一样，具有到达目标电流值的稳定状态较慢的特性。根据电磁传动装置的使用状态，虽然有不受由线圈温度引起的吸引力变化的影响的情况，但当需要更精密的吸引力控制时，吸引力的变化就成了问题。
图3表示用电磁传动装置升降驱动切割刀头制作切割文字的切割薄板用切割机的螺线管的电流，由驱动电路供给具有一定波形的电压使螺线管起动。这时，电流值随着螺线管的温度变化而变化，温度越高电流值越小，使切割刀头的落下速度减慢。由此，刀头在落地时及切割开始时有时会产生切入深度不齐。另外，为了调整到目标电流值与必要的电压间的偏差变得大于规定值，反馈控制量增多，控制到恒定的电流值时产生时间差(S1、S2、S3)。如果要覆盖使用的温度范围，则必须等到Smax为止，从而导致切割速度降低。
于是，为了解决由螺线管的线圈温度引起的工作特性的变化，引出了应解决的技术问题，本发明的目的就是要解决所述问题。
发明内容
为了达到所述目的，本发明提供一种电磁驱动电路，其设有：在螺线管停止时，从电源向螺线管施加小于起动阀值的电压的控制装置；对施加电压时的电流值进行检测的装置；通过所施加电压和测出的电流值算出螺线管电阻值的装置；按照求得的电阻值来控制电磁驱动电压，使驱动时的电流值保持恒定的恒流控制装置。
附图说明
图1是本发明的电磁驱动电路的方框图。
图2是本发明的电磁驱动电路的电磁驱动电流曲线图。
图3是说明线圈温度特性的电磁驱动电流曲线图。
其中，2—开关电路；3—螺线管；4—控制部；5—占空比控制部；6—空载控制部；7—运算部；8—恒流控制部。
具体实施方案
以下，结合附图对本发明的一种实施方案加以说明。图1中2为倒相控制式开关电路，3为螺线管，4为控制部。控制部4具有通过控制开关电路2的开关元件的开关占空比来改变直流输出电压的通常的占空比控制部5，具有向占空比控制部5输出控制信号向螺线管3施加小于起动阀值的微弱电压的空载控制部6，具有通过流经螺线管3的电流和施加的电压求出螺线管电阻的运算部7，具有向占空比控制部5输出控制信号控制流经螺线管3的电流值为恒定的恒流控制部8。
在螺线管3停止时，根据空载控制部6输出的信号，使占空比控制部5控制开关电路2为低占空比，从开关电路2向螺线管3施加小于起动阀值的微弱直流电压。当螺线管3起动时，运算部7通过检测空载时流经螺线管3的电流，由检测出的电流值算出螺线管3的电阻值。恒流控制部8按照求得的电阻值，通过控制占空比控制部5控制开关电路2的输出电压，使电磁驱动时流经螺线管3的电流趋于规定值。
也就是，当螺线管的线圈温度上升使电阻值增加时，开关电路2的输出电压自动上升使电流值为规定值，对由螺线管的电阻值变化而引起的电流值变化进行自动修正。由此，图3所示的螺线管线圈温度工作特性的变化经过补偿后，如图2所示在可能动作的温度范围内，无论温度怎样都可以保持恒定的工作特性。另外，在此之后为了达到目标电流值通过反馈进行调整，由于用与温度特性相关的占空比进行控制就可以迅速调整到目标电流值。
另外，本发明并不局限于所述的实施方案，在本发明的技术范围内可以有各种变化，本发明当然也包括这些变化的实施方案。
如上所述，本发明的螺线管控制电路，通过读取螺线管的电阻值变化来控制电源，使电磁驱动时的供给电流呈恒定波形，所以无论螺线管的线圈温度如何，都能使电磁驱动装置的动作速度保持恒定，使动作具有安定性。另外，缩短了稳定至目标电流值的时间，达到动作高速化的效果。

Claims (1)

1.一种电磁驱动电路，其特征为：设有：在螺线管停止时，从电源向螺线管施加小于起动阀值的电压的控制装置；对施加电压时的电流值进行检测的装置；根据施加电压和测出的电流值算出螺线管电阻值的装置；按照求得的电阻值来控制电磁驱动电压，使驱动时的电流值保持恒定的恒流控制装置。
CNB021047995A 2001-02-19 2002-02-19 电磁驱动电路 Expired - Fee Related CN1235332C (zh)

Applications Claiming Priority (2)

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JP2001042071A JP2002246229A (ja) 2001-02-19 2001-02-19 ソレノイド駆動回路
JP2001042071 2001-02-19

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CN1372376A true CN1372376A (zh) 2002-10-02
CN1235332C CN1235332C (zh) 2006-01-04

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US6735069B2 (en) 2004-05-11
US20020114120A1 (en) 2002-08-22
CN1235332C (zh) 2006-01-04
KR20020077800A (ko) 2002-10-14
JP2002246229A (ja) 2002-08-30
EP1233428A1 (en) 2002-08-21

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