CN102629821B - Method for protecting charging current limiting resistor - Google Patents
Method for protecting charging current limiting resistor Download PDFInfo
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- CN102629821B CN102629821B CN201210136911.8A CN201210136911A CN102629821B CN 102629821 B CN102629821 B CN 102629821B CN 201210136911 A CN201210136911 A CN 201210136911A CN 102629821 B CN102629821 B CN 102629821B
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Abstract
The invention relates to a method for protecting a charging current limiting resistor. The charging current limiting resistor is a part of a servo driver, is controlled by a relay which is in parallel connection with the charging current limiting resistor and is affected by a brake and an inverting module which are in series connection with the charging current limiting resistor. The relay, the brake and the inverting module are controlled by a digital signal processing chip and a safety interlocking control circuit inside the servo driver. The safety interlocking control circuit comprises a relay control signal and a feedback signal, a logic operation and delayed time processing module and a three-state buffer. The method includes that the relay control signal and the feedback signal are used for controlling the validity of driving signals of the brake and the inverting module; the relay control signal and the feedback signal are sent to the logic operation and delayed time processing module; the logic operation and delayed time processing module outputs a driving enabling signal to control an enabling end of the three-state buffer; and the driving signals of the brake and the inverting module are controlled by the three-state buffer. The method for protecting the charging current limiting resistor is simple, reliable and practical and saves the cost.
Description
Technical field
The present invention relates to a kind of method of protecting charging current limiter resistance, belong to power electronics hardware controls technical field.
Background technology
Adopt the power electronic product of condenser paper ripple and energy storage; all need to arrange charging current limiter module; the general form that adopts charging current limiter resistance and relay normally open main contact parallel; be limited in the short circuit surge current that the baseline that external power source is linked into electric capacity (when electric capacity both end voltage is zero) forms, to reach the object of protection electric capacity and relevant device.As servo-driver.
Adopt in the servo-driver product of condenser paper ripple and energy storage, during charging current limiter resistance, have the situation of burning to occur.The lighter, equipment self damages or fire; Severe one, causes all devices dead electricity of same bus, and expansion accident scope, causes serious production accident.
When charging current limiter module is operated in current-limiting charge, relay normally open main contacts is off-state, and charging current is given capacitor charging after resistance limits; Complete current-limiting charge, relay normally open main contacts is closure state, and resistance, by short circuit, is deactivated.
As shown in Figure 1, relay is controlled by control section.When control section detect electric capacity both end voltage approach normal voltage 85% time, and other correlation signal is all ready, relay allows closed.
Control is normal but reason that charging current limiter resistance is burnt: relay is not having closed in the situation that, has the of short duration large electric current current-limiting resistance of flowing through that continues, and surpasses the power that resistance can bear.
The driving signal of the braking of servo-driver and inversion module is by the DSP(main control chip on control circuit board) produce.At control circuit board, power on initial a period of time, DSP(main control chip on plate) state of IO pin is uncontrollable, at relay, do not meet under closed condition, the driving signal of braking or inversion module has inevitable wrong generation on dsp chip, to cause braking or inversion module to mislead, just there will be of short durationly to continue the large electric current current-limiting resistance of flowing through, thereby burn charging current limiter resistance.
Summary of the invention
In order to overcome above deficiency, the present invention has designed a kind of method of protecting charging current limiter resistance, with solving charging current limiter resistance regular problem of being burnt in the main loop of power circuit of servo-driver.
In order to reach above object, main technical content of the present invention is as follows:
Protect a method for charging current limiter resistance, described charging current limiter resistance is the part that forms servo-driver, by the Control of described charging current limiter resistance parallel connection, and affected by braking and the inversion module of connecting with described charging current limiter resistance; Described relay, braking and inversion module are controlled by digital signal processing chip and the safety interlocking control circuit of servo-driver inside; Described safety interlocking control circuit comprises relay control signal, relay feedback signal, logical operation and delay process module and tristate buffer; Described method is by the validity of the driving signal of relay control signal and relay feedback signal participation control braking and inversion module; Described relay control signal and relay feedback signal are given logical operation and delay process module; Described logical operation and one of delay process module output drive and allow signal, control the Enable Pin of tristate buffer; The driving signal of described braking and inversion module is controlled by tristate buffer.
Above-mentioned relay control signal can send by digital signal processing chip internal processes, also can be sent by hardware circuit, and auxiliary circuit or the mechanism of described relay status feedback signal in relay produces correlation behavior, after hardware circuit shaping, produces.
Above-mentioned logical operation and delay process module are programmable logic devices.
Above-mentioned relay control signal and relay status feedback signal need to be after programmable logic device be done 100 milliseconds of logic "and" operation time delays output drive and allow signal.
By technique scheme, the present invention at least has following advantages:
1, Control and state feedback signal are as one of braking and condition of inversion module permission work.
2, must relay regular event, and other control signal is all normal, just allows braking and inversion module work, has prevented the situation generation that braking and driver module mislead.
3, the Control of introducing and state feedback signal are after logical operation and delay process, and the driving that obtains braking and inversion module allows signal.
4, the driving of time delay output allows signal to prevent the electromagnetic pulse interference of relay during moving.
The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of charging current limiter resistance of the prior art;
Fig. 2 is structured flowchart of the present invention;
Fig. 3 is the structured flowchart of embodiment.
Embodiment
For further setting forth the present invention, reach technological means and the effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, its embodiment, structure, feature and effect thereof to proposing according to the present invention, be described in detail as follows.
As shown in Figure 2, a kind of method of protecting charging current limiter resistance, charging current limiter resistance is the part that forms servo-driver, by the Control of charging current limiter resistance parallel connection, and affected by braking and the inversion module of connecting with charging current limiter resistance; Relay, braking and inversion module are controlled by digital signal processing chip and the safety interlocking control circuit of servo-driver inside; Safety interlocking control circuit comprises relay control signal, relay feedback signal, logical operation and delay process module and tristate buffer; Method is by the validity of the driving signal of relay control signal and relay feedback signal participation control braking and inversion module; Relay control signal and relay feedback signal are given logical operation and delay process module; Logical operation and one of delay process module output drive and allow signal, control the Enable Pin of tristate buffer; The driving signal of braking and inversion module is controlled by tristate buffer.
Relay control signal can send by digital signal processing chip internal processes, also can be sent by hardware circuit, and auxiliary circuit or the mechanism of relay status feedback signal in relay produces correlation behavior, after hardware circuit shaping, produces.
Logical operation and delay process module are programmable logic devices.
Relay control signal and relay status feedback signal need to be after programmable logic device be done 100 milliseconds of logic "and" operation time delays output drive and allow signal.
Embodiment:
As shown in Figure 3, a kind of method of protecting charging current limiter resistance, the work of charging current limiter resistance is that braking and the driver module of being connected with it affect by Control in parallel with it.Relay, braking and driver module are to be controlled by the digital signal processing chip of servo-driver inside and safety interlocking control circuit, and servo-driver safety interlocking control circuit comprises relay control signal and state feedback signal, logical operation and delay process module, tristate buffer (54HC244).Logical operation and delay process module are realized by programmable logic device (CPLD).
Relay control signal (A) can be produced by digital signal processing chip (dsp chip) or hardware circuit that (1 level represents close command, 0 level represents open command), relay status feedback signal (B) produces (1 level represents that relay is closed, and 0 level represents that relay is off-state) by the state feedback after the actuating of relay after electric circuit inspection and shaping.These two signals are all given CPLD.CPLD makes logical operation and delay process to these two signals, and delay time is 100 milliseconds, and output signal drives the enable signal (Y, 1 level representative can driver output, 0 level represents forbids driver output) of signal as braking and inversion module.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet not in order to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, when can utilizing the technology contents of above-mentioned announcement to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be the content that does not depart from technical solution of the present invention, any simple modification of above embodiment being done according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (4)
1. protect a method for charging current limiter resistance, described charging current limiter resistance is the part that forms servo-driver, by the Control of described charging current limiter resistance parallel connection, and affected by braking and the inversion module of connecting with described charging current limiter resistance; It is characterized in that: described relay, braking and inversion module are controlled by digital signal processing chip and the safety interlocking control circuit of servo-driver inside; Described safety interlocking control circuit comprises relay control signal, relay status feedback signal, logical operation and delay process module and tristate buffer; Described method is by the validity of the driving signal of relay control signal and relay status feedback signal participation control braking and inversion module; Described relay control signal and relay status feedback signal are given logical operation and delay process module; Described logical operation and one of delay process module output drive and allow signal, control the Enable Pin of tristate buffer; The driving signal of described braking and inversion module is controlled by tristate buffer.
2. a kind of method of protecting charging current limiter resistance according to claim 1; it is characterized in that described relay control signal is sent or sent by hardware circuit by digital signal processing chip internal processes; auxiliary circuit or the mechanism of described relay status feedback signal in relay produces correlation behavior, after hardware circuit shaping, produces.
3. a kind of method of protecting charging current limiter resistance according to claim 1, is characterized in that described logical operation and delay process module are programmable logic devices.
4. according to a kind of method of protecting charging current limiter resistance described in claim 1 or 3, it is characterized in that described relay control signal and relay status feedback signal need to be after programmable logic device be done 100 milliseconds of logic "and" operation time delays output drive and allow signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210136911.8A CN102629821B (en) | 2012-05-04 | 2012-05-04 | Method for protecting charging current limiting resistor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210136911.8A CN102629821B (en) | 2012-05-04 | 2012-05-04 | Method for protecting charging current limiting resistor |
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| CN102629821A CN102629821A (en) | 2012-08-08 |
| CN102629821B true CN102629821B (en) | 2014-03-19 |
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| CN201210136911.8A Active CN102629821B (en) | 2012-05-04 | 2012-05-04 | Method for protecting charging current limiting resistor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105591365A (en) * | 2016-02-25 | 2016-05-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Frequency converter main circuit relay failure protection method |
| CN107528460B (en) * | 2016-06-22 | 2021-08-06 | 博世力士乐(西安)电子传动与控制有限公司 | Frequency converter soft start circuit and frequency converter comprising same |
| CN113394052B (en) * | 2021-04-26 | 2023-02-28 | 株洲中车时代电气股份有限公司 | Safety signal electricity taking device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1694345A (en) * | 2005-06-03 | 2005-11-09 | 孙力 | Sine-wave drive of step-by-step motor |
| CN101127484A (en) * | 2007-05-23 | 2008-02-20 | 中国科学院电工研究所 | A digital high voltage DC power |
| CN201134755Y (en) * | 2007-11-20 | 2008-10-15 | 深圳和而泰智能控制股份有限公司 | Variable-frequency power supply circuit protecting device |
| CN102001189A (en) * | 2010-10-19 | 2011-04-06 | 南京埃斯顿数字技术有限公司 | Alternating current servo main drive system applied to mechanical crank pressing machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101103616B1 (en) * | 2008-01-07 | 2012-01-09 | 에스케이이노베이션 주식회사 | The circuit apparatus for protecting a pre-charge resistance using an inter-lock switch |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1694345A (en) * | 2005-06-03 | 2005-11-09 | 孙力 | Sine-wave drive of step-by-step motor |
| CN101127484A (en) * | 2007-05-23 | 2008-02-20 | 中国科学院电工研究所 | A digital high voltage DC power |
| CN201134755Y (en) * | 2007-11-20 | 2008-10-15 | 深圳和而泰智能控制股份有限公司 | Variable-frequency power supply circuit protecting device |
| CN102001189A (en) * | 2010-10-19 | 2011-04-06 | 南京埃斯顿数字技术有限公司 | Alternating current servo main drive system applied to mechanical crank pressing machine |
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Address after: 213102, Jiangsu Changzhou District, Wujin Province remote view of the town to build rural areas Patentee after: Changzhou Yun Kong electronics limited company Address before: 213102, Jiangsu Changzhou District, Wujin Province remote view of the town to build rural areas Patentee before: Changzhou Yunkong Electronic CO., Ltd. |
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