CN102693872B - Alternating-current contactor controller and control method based on low-voltage capacitor - Google Patents
Alternating-current contactor controller and control method based on low-voltage capacitor Download PDFInfo
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- CN102693872B CN102693872B CN201210208508.1A CN201210208508A CN102693872B CN 102693872 B CN102693872 B CN 102693872B CN 201210208508 A CN201210208508 A CN 201210208508A CN 102693872 B CN102693872 B CN 102693872B
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Abstract
The invention relates to a voltage drop prevention wide-voltage alternating-current contactor controller based on a low-voltage capacitor. The controller comprises a rectification bridge, a filter capacitor, a strong-current exciting switch tube, a low-voltage maintenance switch tube, a voltage sampling circuit, a switch power, a low-voltage maintenance power, a singlechip control system, a low-voltage capacitor, and a diode. When in normal start, the singlechip system carries out PWM (pulse width modulation) control through follow current by the strong-current exciting switch tube, the diode and the low-voltage maintenance switch tube, after the voltage is dropped, the low-voltage maintenance switch tube provides a contactor coil with required energy for operation in voltage drop period through discharge of the low-voltage capacitor, so that continuous operation of the alternating-current contactor can be realized accurately and conveniently in voltage drop period, and wide-voltage operation is realized, therefore, the contactor controller has the characteristics of convenience in control, low cost, energy conservation, strong applicability and the like.
Description
Technical field
The present invention relates to a kind of reactance voltage based on low-voltage capacity and fall Width funtion AC contactor controller and control method thereof, belong to contactor field.
Background technology
The existing discussion of contactor of Voltage Drop is resisted in current document, but, contactor control realization Width funtion controls, low-voltage can not be realized keep falling with low-voltage capacity reactance voltage, if carry out low-voltage to keep falling with low-voltage capacity reactance voltage, just cannot realize Width funtion to control, the patent of invention " contactor controller that AC/DC universal reactance voltage falls " (patent No.: CN 201584367.U) that such as Liu Xiang Jun etc. declare, this patent is that normal startup is with when keeping running, single-chip microcomputer carries out PWM control realization Width funtion by the excitatory switching tube of heavy current and afterflow and section breaker pipe to contactor coil and controls, after voltage sampling circuit detects that supply voltage falls, the excitatory switching tube of Single-chip Controlling heavy current and afterflow and section breaker pipe carry out PWM control, filter capacitor provides energy for coil, the electric pressure of this filter capacitor is higher, such cost is higher, but but cannot realize low-voltage to keep falling with low-voltage capacity reactance voltage, we are carrying out in intelligent AC contactor research for a long time in a large number, discovery can have Width funtion simultaneously and control, low-voltage keeps the importance falling function with low-voltage capacity reactance voltage.
Summary of the invention
A kind of reactance voltage based on low-voltage capacity is the object of the present invention is to provide to fall Width funtion AC contactor controller and control method thereof, during normal startup, Single Chip Microcomputer (SCM) system is by the excitatory switching tube of heavy current and diode, PWM control is carried out in the afterflow of low pressure maintained switch, when normal maintenance runs, Switching Power Supply mesolow keeps Power supply, at single-chip computer control system after voltage sampling circuit detects that supply voltage falls, single-chip computer control system controls low pressure maintained switch pipe and keeps conducting, low pressure maintained switch pipe maintains the energy needed for contactor coil maintenance operation during being provided in Voltage Drop by low-voltage capacity electric discharge, ensure that contactor does not discharge during Voltage Drop, can ensure that A.C. contactor is accurate, contactor continuous service during realizing Voltage Drop easily, realize Width funtion work, have and control conveniently, cost is low, energy-conservation, the features such as application is strong.
The object of the present invention is achieved like this, and it comprises rectifier bridge, filter capacitor, the excitatory switching tube of heavy current, low pressure maintained switch pipe, voltage sampling circuit, Switching Power Supply, low pressure keeps power supply, Single Chip Microcomputer (SCM) system, low-voltage capacity, diode, contactor coil and external control switch, it is characterized in that: the Voltage Drop sampled signal input in one end of a termination external control switch of power supply and voltage sampling circuit, normal break-make in AC one end of another termination rectifier bridge of external control switch and voltage sampling circuit controls sampled signal input, signal common port in the AC other end of another termination rectifier bridge of power supply and voltage sampling circuit, the anode of rectifier bridge connects the collector electrode of the excitatory switching tube of heavy current respectively, an input of Switching Power Supply and the positive pole of filter capacitor, the emitter of the excitatory switching tube of heavy current or source electrode respectively with one end of contactor coil, emitter or the source electrode of low pressure maintained switch pipe connect, the negative terminal of rectifier bridge respectively with another input of Switching Power Supply, the negative pole of filter capacitor, the other end of contactor coil, low pressure in Switching Power Supply keeps the negative terminal of power supply, the negative pole of low-voltage capacity, diode cathode connects, and low pressure keeps the anode of power supply and the positive pole of low-voltage capacity, diode cathode, the collector electrode of low pressure maintained switch pipe connects, the output of voltage sampling circuit receives the first input end of Single Chip Microcomputer (SCM) system, the output of the Voltage Drop sampled signal of voltage sampling circuit receives the second input of Single Chip Microcomputer (SCM) system, two outputs of Switching Power Supply respectively with Power of SCM System end, the power end of voltage sampling circuit connects, and two delivery outlets of Single Chip Microcomputer (SCM) system are the control pole of excitatory switching tube with heavy current respectively, the control pole of low pressure maintained switch pipe connects, and low pressure maintenance power supply is a power supply in Switching Power Supply.
The present invention compared with prior art, during normal startup, Single Chip Microcomputer (SCM) system is by the excitatory switching tube of heavy current and diode, PWM control is carried out in the afterflow of low pressure maintained switch, when normal maintenance runs, Switching Power Supply mesolow keeps Power supply, at single-chip computer control system after voltage sampling circuit detects that supply voltage falls, single-chip computer control system controls low pressure maintained switch pipe and keeps conducting, low pressure maintained switch pipe maintains the energy needed for contactor coil maintenance operation during being provided in Voltage Drop by low-voltage capacity electric discharge, ensure that contactor does not discharge during Voltage Drop, can ensure that A.C. contactor is accurate, contactor continuous service during realizing Voltage Drop easily, realize Width funtion work, have and control conveniently, cost is low, energy-conservation, the features such as application is strong.
Control method of the present invention is: when external control switch closes, Single Chip Microcomputer (SCM) system is after voltage sampling circuit detects that normal break-make control sampled signal shows that contactor applies excitation power supply voltage, first judge it is DC power supply or AC power, then according to the size of supply voltage, Single Chip Microcomputer (SCM) system is with different frequencies and the excitatory switching tube work of Duty ratio control heavy current, control the conducting of low pressure maintained switch pipe, in the heavy current excitatory switching tube turn-off time, contactor coil electric current is by low pressure maintained switch pipe and diode continuousing flow, realize the strong excitatory start-up course of optimization under wide power voltage, after Contactor Starting completes, because required maintenance energy is very little, control low pressure maintained switch pipe by Single Chip Microcomputer (SCM) system and be still in conducting state, Switching Power Supply mesolow keeps power supply to make contactor coil be in small-power state by low pressure maintained switch pipe, realize energy-saving run, when external control switch is opened, through voltage sampling circuit, single-chip microcomputer detects that normal break-make controls sampled signal is that low level shows that contactor should normally divide and has no progeny, immediately by low pressure maintained switch pipe, achieve quick disjunction, if generation Voltage Drop, through voltage sampling circuit, single-chip microcomputer detects that Voltage Drop sampled signal input and normal break-make control sampled signal input end signal all in low level, show contactor power supply generation Voltage Drop, Single-chip Controlling low pressure maintained switch pipe keeps conducting, low-voltage capacity is by low pressure maintained switch tube discharge, the energy of contactor coil maintenance needed for on-state is provided, ensure that contactor does not discharge during Voltage Drop, can ensure that A.C. contactor is accurate, contactor continuous service during realizing Voltage Drop easily, realize Width funtion work, have and control conveniently, cost is low, energy-conservation, the features such as application is strong.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present invention.
Fig. 2 is the schematic block circuit diagram of the invention process one.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described further.
As shown in Figure 1, a kind of reactance voltage based on low-voltage capacity falls Width funtion AC contactor controller, comprises rectifier bridge B, filter capacitor H, the excitatory switching tube M of heavy current, low pressure maintained switch pipe F, voltage sampling circuit G, Switching Power Supply J, low pressure keeps power supply D, Single Chip Microcomputer (SCM) system I, low-voltage capacity C, diode N, contactor coil E, external control switch K;
It is characterized in that: the Voltage Drop sampled signal input 3 in one end of a termination external control switch K of power supply A and voltage sampling circuit G, normal break-make in AC one end of another termination rectifier bridge B of external control switch K and voltage sampling circuit G controls sampled signal input 1, signal common port 2 in the AC other end of another termination rectifier bridge B of power supply A and voltage sampling circuit G, the anode of rectifier bridge B connects the collector electrode of the excitatory switching tube M of heavy current respectively, an input of Switching Power Supply J and the positive pole of filter capacitor H, the emitter of the excitatory switching tube M of heavy current or source electrode respectively with one end of contactor coil E, emitter or the source electrode of low pressure maintained switch pipe F connect, the negative terminal of rectifier bridge B respectively with another input of Switching Power Supply J, the negative pole of filter capacitor H, the other end of contactor coil E, low pressure in Switching Power Supply J keeps the negative terminal of power supply D, the negative pole of low-voltage capacity C, diode N positive pole connects, low pressure keeps the anode of power supply D and the positive pole of low-voltage capacity C, diode N negative pole, the collector electrode of low pressure maintained switch pipe F connects, the output 4 of voltage sampling circuit G receives the input a of Single Chip Microcomputer (SCM) system I, the output 5 of the Voltage Drop sampled signal of voltage sampling circuit G receives the input b of Single Chip Microcomputer (SCM) system I, two outputs of Switching Power Supply J respectively with Single Chip Microcomputer (SCM) system I power end, the power end of voltage sampling circuit G connects, two delivery outlets of Single Chip Microcomputer (SCM) system I are the control pole of excitatory switching tube M with heavy current respectively, the control pole of low pressure maintained switch pipe F connects, low pressure maintenance power supply D is a power supply in Switching Power Supply J.
It is worth mentioning that, the excitatory switching tube M of heavy current of the present invention is IGBT igbt or transistor or MOSFET field effect transistor.Described low pressure maintained switch pipe F is IGBT igbt or transistor or MOSFET field effect transistor.
When external control switch closes, Single Chip Microcomputer (SCM) system is after voltage sampling circuit detects that normal break-make control sampled signal shows that contactor applies excitation power supply voltage, first judge it is DC power supply or AC power, then according to the size of supply voltage, Single Chip Microcomputer (SCM) system is with different frequencies and the excitatory switching tube work of Duty ratio control heavy current, control the conducting of low pressure maintained switch pipe, in the heavy current excitatory switching tube turn-off time, contactor coil electric current is by low pressure maintained switch pipe and diode continuousing flow, realize the strong excitatory start-up course of optimization under wide power voltage, after Contactor Starting completes, because required maintenance energy is very little, control low pressure maintained switch pipe by Single Chip Microcomputer (SCM) system and be still in conducting state, Switching Power Supply mesolow keeps power supply to make contactor coil be in small-power state by low pressure maintained switch pipe, realize energy-saving run, when external control switch is opened, through voltage sampling circuit, single-chip microcomputer detects that normal break-make controls sampled signal is that low level shows that contactor should normally divide and has no progeny, immediately by low pressure maintained switch pipe, achieve quick disjunction, if generation Voltage Drop, through voltage sampling circuit, single-chip microcomputer detects that Voltage Drop sampled signal input and normal break-make control sampled signal input end signal all in low level, show contactor power supply generation Voltage Drop, Single-chip Controlling low pressure maintained switch pipe keeps conducting, low-voltage capacity is by low pressure maintained switch tube discharge, the energy of contactor coil maintenance needed for on-state is provided, ensure that contactor does not discharge during Voltage Drop.
As shown in Figure 2, a kind of reactance voltage based on low-voltage capacity falls Width funtion AC contactor controller, comprise rectifier bridge B, filter capacitor H, the excitatory switching tube M of heavy current, low pressure maintained switch pipe F, voltage sampling circuit G, Switching Power Supply J, low pressure keeps power supply D, Single Chip Microcomputer (SCM) system I, low-voltage capacity C, diode N, contactor coil E, it is characterized in that: described external control switch K changes hand push button K into, one end of power supply A connects one end of hand push button K normally open contact respectively, one end of Self-lock contactor normally open contact E1, the other end of hand push button K normally open contact and the other end of Self-lock contactor normally open contact E1, Voltage Drop sampled signal input 3 in voltage sampling circuit G connects with one end of hand push button K normally closed interlock, normal break-make in another termination voltage sampling circuit G of manual button K normally closed interlock controls AC one end of sampled signal input 1 and rectifier bridge B, signal common port 2 in the AC other end of another termination rectifier bridge B of power supply A and voltage sampling circuit G, other part-structures are identical with the present invention.
When hand push button K normally open contact closes, Single Chip Microcomputer (SCM) system is after voltage sampling circuit detects that normal break-make control sampled signal shows that contactor applies excitation power supply voltage, first judge it is DC power supply or AC power, then according to the size of supply voltage, Single Chip Microcomputer (SCM) system is with different frequencies and the excitatory switching tube work of Duty ratio control heavy current, control the conducting of low pressure maintained switch pipe, in the heavy current excitatory switching tube turn-off time, contactor coil electric current is by low pressure maintained switch pipe and diode continuousing flow, realize the strong excitatory start-up course of optimization under wide power voltage, after Contactor Starting completes, because required maintenance energy is very little, control low pressure maintained switch pipe by Single Chip Microcomputer (SCM) system and be still in conducting state, Switching Power Supply mesolow keeps power supply to make contactor coil be in small-power state by low pressure maintained switch pipe, realize energy-saving run, when hand push button K normally closed interlock is opened, through voltage sampling circuit, single-chip microcomputer detects that normal break-make controls sampled signal is that low level shows that contactor should normally divide and has no progeny, immediately by low pressure maintained switch pipe, achieve quick disjunction, if generation Voltage Drop, through voltage sampling circuit, single-chip microcomputer detects that Voltage Drop sampled signal input and normal break-make control sampled signal input end signal all in low level, show contactor power supply generation Voltage Drop, Single-chip Controlling low pressure maintained switch pipe keeps conducting, low-voltage capacity is by low pressure maintained switch tube discharge, the energy of contactor coil maintenance needed for on-state is provided, ensure that contactor does not discharge during Voltage Drop.
Be more than preferred embodiment of the present invention, all changes done according to technical solution of the present invention, when the function produced does not exceed the scope of technical solution of the present invention, all belong to protection scope of the present invention.
Claims (5)
1. the control method based on the AC contactor controller of low-voltage capacity, described AC contactor controller, comprises rectifier bridge (B), filter capacitor (H), the excitatory switching tube of heavy current (M), low pressure maintained switch pipe (F), voltage sampling circuit (G), Switching Power Supply (J), low pressure maintenance power supply (D), Single Chip Microcomputer (SCM) system (I), low-voltage capacity (C), diode (N), contactor coil (E) and external control switch (K), Voltage Drop sampled signal input (3) in one end of external control switch (K) described in one termination of one power supply (A) and described voltage sampling circuit (G), normal break-make in AC one end of another termination rectifier bridge (B) of external control switch (K) and voltage sampling circuit (G) controls sampled signal input (1), signal common port (2) in the AC other end of another termination rectifier bridge (B) of power supply (A) and voltage sampling circuit (G), the anode of rectifier bridge (B) connects the collector electrode of the excitatory switching tube of heavy current (M) respectively, an input of Switching Power Supply (J) and the positive pole of filter capacitor (H), the emitter of the excitatory switching tube of heavy current (M) connects with the emitter of one end of contactor coil (E), low pressure maintained switch pipe (F), the negative terminal of rectifier bridge (B) keeps the negative terminal of power supply (D), the negative pole of low-voltage capacity (C), diode (N) positive pole to connect with the low pressure in the other end of the negative pole of another input of Switching Power Supply (J), filter capacitor (H), contactor coil (E), Switching Power Supply (J) respectively, low pressure keeps the anode of power supply (D) and the positive pole of low-voltage capacity (C), diode (N) negative pole, the collector electrode of low pressure maintained switch pipe (F) connects, the output (4) of voltage sampling circuit (G) receives the first input end of Single Chip Microcomputer (SCM) system (I), the output (5) of the Voltage Drop sampled signal of voltage sampling circuit (G) receives the second input of Single Chip Microcomputer (SCM) system (I), two outputs of Switching Power Supply (J) respectively with Single Chip Microcomputer (SCM) system (I) power end, the power end of voltage sampling circuit (G) connects, two delivery outlets of Single Chip Microcomputer (SCM) system (I) are the control pole of excitatory switching tube (M) with heavy current respectively, the control pole of low pressure maintained switch pipe (F) connects, low pressure maintenance power supply (D) is a power supply in Switching Power Supply (J), it is characterized in that: when described external control switch closes, described Single Chip Microcomputer (SCM) system is after voltage sampling circuit detects that normal break-make control sampled signal shows that contactor applies excitation power supply voltage, first judge it is DC power supply or AC power, then according to the size of supply voltage, described Single Chip Microcomputer (SCM) system is with the excitatory switching tube work of heavy current described in different frequencies and Duty ratio control, control the conducting of low pressure maintained switch pipe, in the heavy current excitatory switching tube turn-off time, described contactor coil electric current is by low pressure maintained switch pipe and diode continuousing flow, realize the strong excitatory start-up course of optimization under wide power voltage, after Contactor Starting completes, because required maintenance energy is very little, control low pressure maintained switch pipe by Single Chip Microcomputer (SCM) system and be still in conducting state, Switching Power Supply mesolow keeps power supply to make contactor coil be in small-power state by low pressure maintained switch pipe, realize energy-saving run, when external control switch is opened, through voltage sampling circuit, single-chip microcomputer detects that normal break-make controls sampled signal is that low level shows that contactor should normally divide and has no progeny, immediately by low pressure maintained switch pipe, achieve quick disjunction, if generation Voltage Drop, through voltage sampling circuit, single-chip microcomputer detects that Voltage Drop sampled signal input and normal break-make control sampled signal input end signal all in low level, show contactor power supply generation Voltage Drop, Single-chip Controlling low pressure maintained switch pipe keeps conducting, low-voltage capacity is by low pressure maintained switch tube discharge, the energy of contactor coil maintenance needed for on-state is provided, ensure that contactor does not discharge during Voltage Drop.
2. the control method of the AC contactor controller based on low-voltage capacity according to claim 1, is characterized in that: the excitatory switching tube of described heavy current (M) is IGBT igbt or transistor or MOSFET field effect transistor.
3. the control method of the AC contactor controller based on low-voltage capacity according to claim 1, is characterized in that: described low pressure maintained switch pipe (F) is IGBT igbt or transistor or MOSFET field effect transistor.
4. the control method of the AC contactor controller based on low-voltage capacity according to claim 1, is characterized in that: described low-voltage capacity is super capacitor or low-voltage electrochemical capacitor.
5. the control method of the AC contactor controller based on low-voltage capacity according to claim 1, it is characterized in that: described external control switch changes hand push button into, one end of power supply (A) connects one end of hand push button normally open contact respectively, one end of Self-lock contactor normally open contact (E1), the other end of hand push button normally open contact and the other end of Self-lock contactor normally open contact (E1), Voltage Drop sampled signal input (3) in voltage sampling circuit (G) connects with one end of hand push button normally closed interlock, normal break-make in another termination voltage sampling circuit (G) of manual button normally closed interlock controls AC one end of sampled signal input (1) and rectifier bridge (B), signal common port (2) in the AC other end of another termination rectifier bridge (B) of power supply (A) and voltage sampling circuit (G).
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| CN102693872B true CN102693872B (en) | 2015-04-22 |
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| CN103021735B (en) * | 2012-12-11 | 2015-03-04 | 福州大学 | Alternating current contactor intelligent control module with high speed pulse width modulation function |
| CN103762119A (en) * | 2013-12-30 | 2014-04-30 | 上海良信电器股份有限公司 | Wide voltage electromagnetic contactor control circuit with low voltage ride-through function |
| CN104158403A (en) * | 2014-08-06 | 2014-11-19 | 西京学院 | Single chip microcomputer-controlled switching power supply and control method thereof |
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| CN201584367U (en) * | 2009-06-10 | 2010-09-15 | 福州大学 | AC and DC general voltage dropout preventive contactor controller |
| CN101950709A (en) * | 2010-09-17 | 2011-01-19 | 上海诺雅克电气有限公司 | Low-voltage holding contactor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4513562B2 (en) * | 2004-12-28 | 2010-07-28 | アンデン株式会社 | Relay drive circuit |
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| CN201584367U (en) * | 2009-06-10 | 2010-09-15 | 福州大学 | AC and DC general voltage dropout preventive contactor controller |
| CN101950709A (en) * | 2010-09-17 | 2011-01-19 | 上海诺雅克电气有限公司 | Low-voltage holding contactor |
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