CN2596536Y - Controller of general contactor electromagnetic system - Google Patents
Controller of general contactor electromagnetic system Download PDFInfo
- Publication number
- CN2596536Y CN2596536Y CN02266969.8U CN02266969U CN2596536Y CN 2596536 Y CN2596536 Y CN 2596536Y CN 02266969 U CN02266969 U CN 02266969U CN 2596536 Y CN2596536 Y CN 2596536Y
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- controller
- effect transistor
- circuit
- field effect
- electromagnetic system
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Abstract
The utility model discloses a controller of a general contactor electromagnetic system, which is mainly characterized in that the utility model utilizes full voltage to carry out excitation when switchin on, a full voltage excitation circuit is cut off after a field-effect transistor is turned off by an electronic timer after an iron core is stably closed, a switch power supply provides a DC low voltage excitation for an electromagnet simultaneously, and a field-effect transistor arranged in a follow current circuit is turned off by an electronic retarder when switching off. The follow current can be attenuated rapidly, and the breaking speed is improved. The utility model has the capacity of switching on and breaking a short circuit current like a breaker because of the adoption of a contactor of the controller of the utility model. The utility model can realize remote automatic control by matched with a light current control circuit.
Description
Technical field
The utility model relates to a kind of controller of ac contactor electromagnetic system, adopt the A.C. contactor of the controller of the utility model electromagnetic system, can turn-off continuous current circuit fast after the outage, make disengaging movement speed unshakable in one's determination far above traditional contactor, thereby the ability with disjunction short circuit current, thereby the controller of a kind of electromagnetic system of universal contactor of more specifically saying so.
Background technology
Adopt contactor positive and negative variation of magnetic flux unshakable in one's determination in the connection process of alternating electromagnet, it is 0 that magnetic flux is crossed 0 o'clock suction, so switching force fluctuates, during disjunction because the short-circuited conducting sleeve afterflow, the degaussing time unshakable in one's determination is long, cause disjunction long time of delay, and the disjunction movement velocity is low.
Adopt the contactor of DC electromagnet, alternating current 220V voltage is powered to magnetizing coil behind bridge rectifier after the series capacitance step-down again, so becomes the little electric current of low-voltage after the step-down.When energized, the travel switch K in parallel with electric capacity makes the capacitor C short circuit, so the 220V high voltage is directly excitatory for the magnetizing coil high-voltage large current behind bridge rectifier.The contactor disjunction of this circuit is to be realized by the control power supply that turn-offs 220V, after 220V is turned off, magnetizing coil constitutes the continuous current circuit of conducting through bridge rectifier, whole magnetizing coil becomes a big short-circuited conducting sleeve, it can make afterflow keep the 100ms-200ms time, in the moving disengaging movement process unshakable in one's determination, magnetic flux descends and produces induced potential u for negative on just down in magnetizing coil, and this pressure energy induced electricity strengthens afterflow and makes separating rate decline unshakable in one's determination.Therefore the contact separating rate can only reach below the 0.2m/s; so time of afterflow is very long; disjunction length time of delay and disjunction movement velocity are low to cause the contactor arcing time long; breaking capacity is low; thereby the making capacity of traditional A.C. contactor to compare with circuit breaker with breaking capacity be very low; therefore the ability that does not have connection and disjunction short circuit current does not just possess short-circuit protection function yet.And because travel switch and interlock unshakable in one's determination, therefore unshakable in one's determination just having opened at closed front travel switch inserted energizing loop with decompression capacitor, therefore this moment, exciting curent became little electric current by big current conversion, suction can diminish suddenly when closed, cause contact and iron coring vibration big, make making capacity low.
Further analyze, why circuit breaker has the ability of connection and disjunction short circuit current, be because the switching force or the separating brake power of circuit breaker realize by energy-stored spring, active force is all identical when therefore each connection or disjunction, and active force can not suddenly change and fluctuate when connecting, just can not occur spring or vibration when contact is connected so yet, can not occur time of delay during disjunction simultaneously as the contactor as the contactor.
Summary of the invention
To be solved in the utility model is that existing contactor time of afterflow when disjunction is long, and breaking capacity is low, does not have short-circuit protection function, and contact and iron coring vibration are big when closing a floodgate, and adhesive is unreliable, the problem that making capacity is low.
The technical scheme that addresses the above problem employing is: the controller of electromagnetic system of universal contactor has:
--after connecting with field effect transistor Q1, Q2, magnetizing coil L1 constitutes the total head energizing loop with the control power supply;
--magnetizing coil L1 and field effect transistor Q1 wherein form another continuous current circuit;
--switch multipath voltage regulation power supply provides the field effect transistor Q2 grid voltage of total head energizing loop, and the low pressure source E1 of continuous current circuit;
During combined floodgate, the field effect transistor Q2 in the described total head energizing loop is turn-offed by electronic timer control in closed stable back unshakable in one's determination; During disjunction, the field effect transistor Q1 of described continuous current circuit is turn-offed by the electronic delay device, and the time of delay of described electronic delay device is less than afterflow damping time constant T.
The utility model adopts a kind of electronic circuit to control the exciting curent of DC electromagnet, turn-off exciting curent by field effect transistor during disjunction, make suction unshakable in one's determination be tending towards 0 fast by stationary value, time of delay even also shorter than circuit breaker, when the large opening sum of two disconnected doors is equal to or greater than circuit breaker fracture distance, contactor has just had the ability of the disjunction short circuit current as the circuit breaker so, and has shortened the arcing time, and electric life is long.Because the double break point, so breaking speed is also fast than circuit breaker.In addition, the utility model utilizes switch multipath voltage regulation power supply to adjust the magnetizing coil both end voltage, make that the direct access control power supply of the initial total head energizing loop of combined floodgate total head is excitatory, and after adhesive unshakable in one's determination is stable, offer the relative low-voltage of continuous current circuit by Switching Power Supply, the continuous current circuit that magnetizing coil and another field effect transistor form makes iron core keep closure state; After the timing turn-off time of timer circuit is controlled at adhesive unshakable in one's determination and vibrates end, also promptly after unshakable in one's determination and contact adhesive are stablized, just excitatory big current conversion is become to keep little electric current, the DC electromagnet magnetic flux is evenly to rise in this process, do not have 0 point again, so switching force is stable just as the energy-stored spring power in the circuit breaker.
As further improvement of the utility model, described timer circuit comprises resistance, electric capacity, voltage-stabiliser tube, triode and photoelectric coupling circuit, by the break-make of the field effect transistor in the electronic trip unit control total head energizing loop.The electric capacity two ends are parallel with the bleeder resistance that described timer circuit is resetted, and guaranteeing closes a floodgate next time regularly turn-offs the accuracy of field effect transistor.
Further improve again as of the present utility model, form the loop of turn-offing the field effect transistor grid voltage, guarantee the field effect transistor reliable turn-off by resistance and photoelectric coupling circuit.
Further improve as of the present utility model, the electronic delay device of controlling described field effect transistor time delayed turn-off is made of the circuit that resistance and electric capacity are in parallel, and the time of delay of this circuit is less than afterflow damping time constant T again.The two ends parallel connection of described magnetizing coil prevents the piezo-resistance of too high voltages and the electric capacity of absorbing high-frequency voltage.Between the grid of described field effect transistor and the source electrode respectively cross-over connection prevent the voltage-stabiliser tube that gate bias are too high.
Further improve again as of the present utility model, also be provided with weak control circuit, described weak control circuit comprises light current combined floodgate control loop and light current separating brake control loop, controls the break-make of the field effect transistor in the described continuous current circuit of field effect transistor in the described total head energizing loop by electronic trip unit.The power supply of described weak control circuit and electronic trip unit is provided by switch multipath voltage regulation power supply.The utility model has communication, measurement, calculating simultaneously, shows memory like this, functions such as storage, and can realize remote measurement, functions such as remote regulating, distant news, remote control.
The above-mentioned feature of controller makes universal contactor that two kinds of different control modes be arranged: first kind of control mode is to connect and the electric current of disjunction controller makes connection of universal contactor major loop and disjunction, and this control mode is identical with the control mode of traditional contactor.The power supply that second kind of control mode is controller always is in "on" position, make the controlled respectively connection and the disjunction that just can control the universal contactor major loop equally of field effect transistor of solid switch in the controller and series excitation coil with combined floodgate knob and separating brake knob, this control mode can replace combined floodgate knob and separating brake knob by the weakness signal, therefore universal contactor can be directly and computer networking, directly controlled by computer.
Description of drawings
Fig. 1 is the schematic diagram of existing ac contactor electromagnetic system controller.
Fig. 2 is the circuit block diagram of the controller of the utility model electromagnetic system of universal contactor.
Fig. 3 is the circuit diagram of the controller of the utility model electromagnetic system of universal contactor.
Embodiment
Figure 1 shows that the schematic diagram of existing ac contactor electromagnetic system controller, alternating current 220V voltage is powered to magnetizing coil behind bridge rectifier after the series capacitance step-down again, travel switch K is in parallel with electric capacity, when closing a floodgate and interlock unshakable in one's determination make the capacitor C short circuit, reach the excitatory low voltage sustain of high pressure.The shortcoming front of the controller of this structure was mentioned, and was not repeated.
With reference to Fig. 2,3, the utility model electromagnetic system of universal contactor controller is applicable to direct current and ac control power supply simultaneously.When the control power supply was DC power supply, controller was directly connected on the DC power supply.When control power supply when being alternating current, be added on the controller after being transformed to direct current by rectification circuit.Control power supply in the present embodiment is an AC power, after resistance R 1, resistance R 2 and diode D6 are added on the capacitor C 1, capacitor C 1 can absorb the high frequency overvoltage that Switching Power Supply causes again to the Switching Power Supply power supply to the control power supply by D1, D2, D3, D4 bridge rectifier.Total head after the rectification is added on the magnetizing coil L1 through Q1, Q2 and D5 again; The gate bias of Q1 field effect transistor provide after by resistance R 3, Z1 step-down, and voltage-stabiliser tube Z3 prevents that field effect transistor Q1 grid voltage from surpassing permissible value; Q2 field effect transistor grid voltage is provided through resistance R 4 current limlitings by Switching Power Supply low pressure source E3, and voltage-stabiliser tube Z3 prevents that the Q2 grid voltage from surpassing permissible value.After connecting the control power supply, after adhesive unshakable in one's determination is stable, by timer field effect transistor Q2 is turn-offed, timer is charged to capacitor C 3 by resistance R 9, reach the light-emitting diode conducting voltage sum of voltage-stabiliser tube Z4 and triode Q4 base voltage, photoelectric coupling circuit U3 when capacitor C 3 voltages after, triode Q4 conducting is again with photoelectric coupling circuit U3 conducting, make field effect transistor Q2 grid voltage short circuit and drop to 0, field effect transistor Q2 turn-offs, and magnetizing coil L1 provides low pressure source E1 to provide little electric current to keep unshakable in one's determination closed through diode D8 power supply by Switching Power Supply.Triode Q4 collector voltage is provided after resistance R 11 step-downs by E1, resistance R 10 is bleeder resistances of capacitor C 3, behind dump, making capacitor C 3 be discharged to both end voltage through resistance R 10 is zero, accurately turn-offs the field effect transistor Q2 in the total head energizing loop when guaranteeing to close a floodgate next time.
In the above timer circuit, when supply voltage is u, Z4 voltage stabilizing value is V
Z4, timing is T1, then T1*u/R11=C3V
Z4So, T1=R11C3V
Z4/ u is known by following formula, and supply voltage is high more, and suction unshakable in one's determination is big, and the time of closing motion unshakable in one's determination is short more, and this circuit just in time satisfies this inverse time lag relation.Because the conducting afterflow effect of field effect transistor Q1 makes exciting curent very great fluctuation process can not occur, suction fluctuation unshakable in one's determination is also little, and after adhesive unshakable in one's determination was stable, field effect transistor Q2 turn-offed.Switching force is just the same stable with the switching force of circuit breaker like this.
Capacitor C 2 is in parallel with E1, and power connection moment, capacitor C 1 provides the low-voltage source of Switching Power Supply work for capacitor C 2 chargings by diode D7, and voltage-stabiliser tube Z2 prevents capacitor C 2 overvoltage.After disconnecting the control power supply during contactor disjunction, capacitor C 1 is by resistance R 9, R10 discharge, after capacitor C 1 voltage drops to less than voltage-stabiliser tube Z1 voltage stabilizing value, field effect transistor Q1 turn-offs, and cuts off the continuous current circuit of being made up of field effect transistor Q1, diode D9 and magnetizing coil L1 and makes exciting curent decay to 0 rapidly.Theory analysis as can be known, be T2=(R9+R10) * C1 the time of delay that the electronic delay device that is made of capacitor C 1 and resistance R 9, R10 turn-offs field effect transistor Q1, selects suitable circuit parameter to make T2＜T, so just can guarantee the quick disjunction of contactor.For preventing that magnetizing coil L1 from producing overvoltage, magnetizing coil L1 piezo-resistance Rv1 in parallel, for guaranteeing field effect transistor Q1 and Q2 reliable turn-off, form the loop of turn-offing field effect transistor Q1, Q2 grid voltage by resistance R 5, photoelectric coupling circuit U1, U2, the reliable turn-off of control field effect transistor Q1 and Q2.U4 and resistance R 6 are electronic trip unit interfaces.Photoelectric coupling circuit U5, resistance R 7, K switch 2 are the control of light current control mode separating brake; Photoelectric coupling circuit U6, capacitor C 4, resistance R 8, resistance R 13, K switch 1 are the control of light current control mode combined floodgate, and wherein: K1 and K2 are the toggle switches of same single-pole double throw.The power supply of electronic trip unit and light current control mode is provided by Switching Power Supply E2.
Claims (10)
1, the controller of electromagnetic system of universal contactor is characterized in that:
--after connecting with field effect transistor (Q1, Q2), magnetizing coil (L1) constitutes the total head energizing loop with the control power supply;
--magnetizing coil (L1) and field effect transistor (Q1) wherein form another continuous current circuit;
--switch multipath voltage regulation power supply provides field effect transistor (Q2) grid voltage of total head energizing loop, and the low pressure source of continuous current circuit (E1);
During combined floodgate, the field effect transistor (Q2) in the described total head energizing loop is turn-offed by electronic timer control in closed stable back unshakable in one's determination; During disjunction, the field effect transistor of described continuous current circuit (Q1) is turn-offed by the electronic delay device, and the time of delay of described electronic delay device is less than afterflow damping time constant (T).
2, the controller of electromagnetic system of universal contactor as claimed in claim 1, it is characterized in that described electronic timer circuit comprises resistance (R9, R11), electric capacity (C3), voltage-stabiliser tube (Z4), triode (Q4) and photoelectric coupling circuit (U3), by the break-make of the field effect transistor (Q2) in the electronic trip unit control total head energizing loop.
3, the controller of electromagnetic system of universal contactor as claimed in claim 2 is characterized in that electric capacity in the described electronic timer circuit (C3) two ends are parallel with the bleeder resistance (R10) that described timer circuit is resetted.
4, the controller of electromagnetic system of universal contactor as claimed in claim 3 is characterized in that forming the loop of turn-offing described field effect transistor (Q1, Q2) grid voltage by resistance (R5), photoelectric coupling circuit (U1, U2).
5, the controller of electromagnetic system of universal contactor as claimed in claim 1 is characterized in that described electronic delay device comprises resistance (R9, R10) and electric capacity (C1), and be T2=(R9+R10) * C1 the time of delay of described electronic delay device, and T2＜T.
6, as the controller of any one described electromagnetic system of universal contactor of claim 1～5, it is characterized in that also being provided with weak control circuit, described weak control circuit comprises light current combined floodgate control loop and light current separating brake control loop, controls the break-make of the field effect transistor (Q1, Q2) in the described continuous current circuit by electronic trip unit.
7, the controller of electromagnetic system of universal contactor as claimed in claim 6, it is characterized in that described light current combined floodgate control loop is made up of resistance (R8, R13), electric capacity (C4), photoelectric coupling circuit (U6) and switch (K1), described light current separating brake control loop is made up of resistance (R7), photoelectric coupling circuit (U5) and switch (K2), and described two switches (K1, K2) are the toggle switches of same single-pole double throw.
8, the controller of electromagnetic system of universal contactor as claimed in claim 7 is characterized in that the power supply (E2) of described weak control circuit and electronic trip unit is provided by switch multipath voltage regulation power supply.
9, the controller of electromagnetic system of universal contactor as claimed in claim 8 is characterized in that described magnetizing coil L1 two ends parallel connection prevents the piezo-resistance (VR1) of too high voltages.
10, the controller of electromagnetic system of universal contactor as claimed in claim 9 is characterized in that between the grid of described field effect transistor (Q1, Q2) and the source electrode that cross-over connection prevents the too high voltage-stabiliser tube of gate bias (D7, D12) respectively.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02266969.8U CN2596536Y (en) | 2002-09-06 | 2002-09-06 | Controller of general contactor electromagnetic system |
| CN02136881.3A CN1233009C (en) | 2002-09-06 | 2002-09-06 | Controller for electromagnetic system of universal contactor |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02266969.8U CN2596536Y (en) | 2002-09-06 | 2002-09-06 | Controller of general contactor electromagnetic system |
| CN02136881.3A CN1233009C (en) | 2002-09-06 | 2002-09-06 | Controller for electromagnetic system of universal contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2596536Y true CN2596536Y (en) | 2003-12-31 |
Family
ID=50138111
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02266969.8U Expired - Lifetime CN2596536Y (en) | 2002-09-06 | 2002-09-06 | Controller of general contactor electromagnetic system |
| CN02136881.3A Expired - Lifetime CN1233009C (en) | 2002-09-04 | 2002-09-06 | Controller for electromagnetic system of universal contactor |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02136881.3A Expired - Lifetime CN1233009C (en) | 2002-09-04 | 2002-09-06 | Controller for electromagnetic system of universal contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN2596536Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393824B (en) * | 2007-09-19 | 2013-11-20 | 通用电气公司 | Modular communication plug-in module for an electronic trip unit |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065890B (en) * | 2012-12-18 | 2015-03-04 | 上海电器科学研究院 | Shock resisting under-voltage release device and method |
| CN105355514B (en) * | 2015-12-14 | 2018-03-27 | 宁波市镇海华泰电器厂 | The A.C. contactor of economize on electricity low-heat noise elimination |
-
2002
- 2002-09-06 CN CN02266969.8U patent/CN2596536Y/en not_active Expired - Lifetime
- 2002-09-06 CN CN02136881.3A patent/CN1233009C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393824B (en) * | 2007-09-19 | 2013-11-20 | 通用电气公司 | Modular communication plug-in module for an electronic trip unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1233009C (en) | 2005-12-21 |
| CN1469408A (en) | 2004-01-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20050921 |
|
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20050921 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |