CN103065890B - Shock resisting under-voltage release device and method - Google Patents
Shock resisting under-voltage release device and method Download PDFInfo
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- CN103065890B CN103065890B CN201210552758.7A CN201210552758A CN103065890B CN 103065890 B CN103065890 B CN 103065890B CN 201210552758 A CN201210552758 A CN 201210552758A CN 103065890 B CN103065890 B CN 103065890B
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Abstract
The invention provides a shock resisting under-voltage release device. The shock resisting under-voltage release device is mainly composed of an accelerated speed detecting circuit, a voltage sample collecting circuit, a central processing unit (CPU), a pulse-width modulation (PWM) circuit, an electromagnet and a working power supply circuit. The CPU obtains power supply voltages through the voltage collecting circuit and an accelerated speed through the accelerated speed detecting circuit and controls attachment of the electromagnet or keeps the electromagnet in the state of attachment through PWM currents of different impulse widths generated by the PWM circuit. The invention further provides a shock resisting method of the under-voltage release device. The under-voltage release device has the advantages of being small in size, simple in structure, little in generated heat, impact and vibration resistant and the like. With the shock resisting method of the under-voltage release device, the under-voltage release device can effectively resist impact and vibration on a frame-type low-voltage breaker of a boat.
Description
Technical field
The present invention relates to a kind of shock resistance under-voltage release and adopt the shock resistance method of this under-voltage release.
Background technology
The frame-type low-voltage circuit breaker that ship uses has following regulation: should be able to ensure breaker closing when the supply voltage of low-voltage circuit breaker is equal to or greater than 85%, when the supply voltage of low-voltage circuit breaker drops in 70% ~ 35% scope of rated voltage, under-voltage release answers action.During the electromagnetic actuation of under-voltage release, for the elastic force overcoming spring needs larger electric current, and after completing adhesive, only need less maintenance electric current just can maintain electromagnet and keep attracted position, if now also pass into higher electric current, electromagnet coil can generate heat damage, so just needs current limliting.Simultaneously; when ship navigates by water across the sea; often can be subject to stronger impact shock; under the high acceleration effect of impact shock, less maintenance electric current will be not enough to maintain electromagnetic actuation, and electromagnet iron core will bounce; and iron core leave attracted position after electromagnetism confining force reduce rapidly; be not enough to iron core to retract holding position, cause device for under-voltage releasing equipment malfunction, frame circuit breaker is tripped and causes serious consequence.
Summary of the invention
The object of this invention is to provide a kind of can shock resistance and make frame-type low-voltage circuit breaker meet ship to use the under-voltage release of regulation and adopt the shock resistance method of this under-voltage release.
In order to achieve the above object, a technical scheme of the present invention there is provided a kind of shock resistance under-voltage release, it is characterized in that, comprising:
Acceleration detection circuit, the acceleration produced after the frame-type low-voltage circuit breaker for detecting ship is subject to impact shock;
Voltage sampling circuit, for the supply voltage of detection block posture low-voltage circuit breaker;
CPU processing unit, the PWM electric current of distinct pulse widths is produced by PWM pulse-width modulation circuit, by PWM Current Control electromagnetic actuation or make electromagnet keep attracting state according to the supply voltage obtained by voltage sampling circuit and the acceleration that obtained by acceleration detection circuit;
Working power circuit, is supplied to acceleration detection circuit, CPU processing unit and PWM pulse-width modulation circuit respectively for the supply voltage of frame-type low-voltage circuit breaker being converted to operating voltage.
Present invention also offers a kind of shock resistance method of above-mentioned shock resistance under-voltage release, it is characterized in that, step is:
If when step 1 CPU processing unit detects that the supply voltage of frame-type low-voltage circuit breaker is not less than 85% of rated voltage by voltage sampling circuit, full pulsewidth PWM electric current is produced by PWM pulse-width modulation circuit, adhesive under the large electromagnetic force that electromagnet produces at big current by CPU processing unit;
Step 2, after electromagnet completes adhesive, CPU processing unit produces narrow spaces PWM electric current by PWM pulse-width modulation circuit, maintains attracting state under the electromagnetic force that electromagnet produces at small area analysis;
Step 3, electromagnet is under attracting state, if the frame-type low-voltage circuit breaker of ship is subject to impact shock, by the acceleration of CPU processing unit by acceleration detection electric circuit inspection impact shock, if when this acceleration is greater than the threshold value preset, CPU processing unit produces full pulsewidth PWM electric current by PWM pulse-width modulation circuit, even if be returned to attracted position under effect under the large electromagnetic force that the iron core generation spring of electromagnet also can produce at big current, when uniform acceleration returns to and is not more than threshold value, CPU processing unit produces narrow spaces PWM electric current by PWM pulse-width modulation circuit again,
If when CPU processing unit detects that the supply voltage of frame-type low-voltage circuit breaker drops in 70% ~ 35% scope of rated voltage by voltage sampling circuit, CPU processing unit is the cut-off of control PWM pulse-width modulation circuit after one section of delay time preset, electromagnet dead electricity discharges under the action of the spring, causes frame-type low-voltage circuit breaker under voltage to thread off.
A kind of shock resistance under-voltage release that the present invention proposes, there is the advantages such as volume is little, circuit is simple, caloric value is little, anti shock and vibration, and the impact shock that the frame-type low-voltage circuit breaker that method provided by the invention makes under-voltage release effectively can resist ship is subject to.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of shock resistance under-voltage release provided by the invention.
Embodiment
For making the present invention become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
As shown in Figure 1, a kind of shock resistance under-voltage release provided by the invention forms primarily of acceleration detection circuit, voltage sampling circuit, CPU processing unit, PWM pulse-width modulation circuit, electromagnet and working power circuit, wherein:
Acceleration detection circuit, the acceleration produced after the frame-type low-voltage circuit breaker for detecting ship is subject to impact shock;
Voltage sampling circuit, for the supply voltage of detection block posture low-voltage circuit breaker;
CPU processing unit, the PWM electric current of distinct pulse widths is produced by PWM pulse-width modulation circuit, by PWM Current Control electromagnetic actuation or make electromagnet keep attracting state according to the supply voltage obtained by voltage sampling circuit and the acceleration that obtained by acceleration detection circuit;
Working power circuit, is supplied to acceleration detection circuit, CPU processing unit and PWM pulse-width modulation circuit respectively for the supply voltage of frame-type low-voltage circuit breaker being converted to operating voltage.
Present invention also offers a kind of shock resistance method of above-mentioned shock resistance under-voltage release, the steps include:
If when step 1 CPU processing unit detects that the supply voltage of frame-type low-voltage circuit breaker is not less than 85% of rated voltage by voltage sampling circuit, full pulsewidth PWM electric current is produced by PWM pulse-width modulation circuit, adhesive under the large electromagnetic force that electromagnet produces at big current by CPU processing unit;
Step 2, after electromagnet completes adhesive, CPU processing unit produces narrow spaces PWM electric current by PWM pulse-width modulation circuit, maintains attracting state under the electromagnetic force that electromagnet produces at small area analysis;
Step 3, electromagnet is under attracting state, if ship frame-type low-voltage circuit breaker is subject to impact shock, by the acceleration of CPU processing unit by acceleration detection electric circuit inspection impact shock, if when this acceleration is greater than the threshold value preset, CPU processing unit produces full pulsewidth PWM electric current by PWM pulse-width modulation circuit, even if be returned to attracted position under effect under the large electromagnetic force that the iron core generation spring of electromagnet also can produce at big current, when uniform acceleration returns to and is not more than threshold value, CPU processing unit produces narrow spaces PWM electric current by PWM pulse-width modulation circuit again,
If when CPU processing unit detects that the supply voltage of frame-type low-voltage circuit breaker drops in 70% ~ 35% scope of rated voltage by voltage sampling circuit, CPU processing unit is the cut-off of control PWM pulse-width modulation circuit after one section of delay time preset, electromagnet dead electricity discharges under the action of the spring, causes frame-type low-voltage circuit breaker under voltage to thread off.
Claims (1)
1. a shock resistance method for shock resistance under-voltage release, this shock resistance under-voltage release comprises acceleration detection circuit, the acceleration produced after the frame-type low-voltage circuit breaker for detecting ship is subject to impact shock; Voltage sampling circuit, for the supply voltage of detection block posture low-voltage circuit breaker; CPU processing unit, the PWM electric current of distinct pulse widths is produced by PWM pulse-width modulation circuit, by PWM Current Control electromagnetic actuation or make electromagnet keep attracting state according to the supply voltage obtained by voltage sampling circuit and the acceleration that obtained by acceleration detection circuit; Working power circuit, be supplied to acceleration detection circuit, CPU processing unit and PWM pulse-width modulation circuit respectively for the supply voltage of frame-type low-voltage circuit breaker being converted to operating voltage, it is characterized in that, step is:
If when step 1 CPU processing unit detects that the supply voltage of frame-type low-voltage circuit breaker is not less than 85% of rated voltage by voltage sampling circuit, full pulsewidth PWM electric current is produced by PWM pulse-width modulation circuit, adhesive under the large electromagnetic force that electromagnet produces at full pulsewidth PWM electric current by CPU processing unit;
Step 2, after electromagnet completes adhesive, CPU processing unit produces narrow spaces PWM electric current by PWM pulse-width modulation circuit, maintains attracting state under the electromagnetic force that electromagnet produces at narrow spaces PWM electric current;
Step 3, electromagnet is under attracting state, if the frame-type low-voltage circuit breaker of ship is subject to impact shock, the acceleration vibrated by acceleration detection electric circuit inspection by CPU processing unit, if when this acceleration is greater than the threshold value preset, CPU processing unit produces full pulsewidth PWM electric current by PWM pulse-width modulation circuit, even if be returned to attracted position under the large electromagnetic force that the iron core generation spring of electromagnet also can produce at full pulsewidth PWM electric current, when uniform acceleration returns to and is not more than threshold value, CPU processing unit produces narrow spaces PWM electric current by PWM pulse-width modulation circuit again,
If when CPU processing unit detects that the supply voltage of frame-type low-voltage circuit breaker drops in 70% ~ 35% scope of rated voltage by voltage sampling circuit, CPU processing unit is the cut-off of control PWM pulse-width modulation circuit after one section of delay time preset, electromagnet dead electricity discharges under the action of the spring, causes frame-type low-voltage circuit breaker under voltage to thread off.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210552758.7A CN103065890B (en) | 2012-12-18 | 2012-12-18 | Shock resisting under-voltage release device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210552758.7A CN103065890B (en) | 2012-12-18 | 2012-12-18 | Shock resisting under-voltage release device and method |
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| CN103065890A CN103065890A (en) | 2013-04-24 |
| CN103065890B true CN103065890B (en) | 2015-03-04 |
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| CN106356243B (en) * | 2016-10-10 | 2018-10-19 | 嘉兴威泰光电科技有限公司 | A kind of invariable power vacuum circuit breaker clutch for clutch control module |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1469408A (en) * | 2002-09-06 | 2004-01-21 | 正泰集团公司 | Controller for electromagnetic system of universal contactor |
| CN202395419U (en) * | 2011-12-13 | 2012-08-22 | 上海电科电器科技有限公司 | Communication-capable undervoltage tripping device |
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| JP2012199143A (en) * | 2011-03-22 | 2012-10-18 | Panasonic Corp | Electromagnetic switching device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1469408A (en) * | 2002-09-06 | 2004-01-21 | 正泰集团公司 | Controller for electromagnetic system of universal contactor |
| CN202395419U (en) * | 2011-12-13 | 2012-08-22 | 上海电科电器科技有限公司 | Communication-capable undervoltage tripping device |
Non-Patent Citations (1)
| Title |
|---|
| 舰船用断路器抗冲击欠压脱扣器的设计;丁家松;《噪声与振动控制》;20020228(第1期);第33-36页 * |
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