CN105428154A - Direct-current electromagnetic relay drive circuit and drive method therefor - Google Patents
Direct-current electromagnetic relay drive circuit and drive method therefor Download PDFInfo
- Publication number
- CN105428154A CN105428154A CN201510883741.3A CN201510883741A CN105428154A CN 105428154 A CN105428154 A CN 105428154A CN 201510883741 A CN201510883741 A CN 201510883741A CN 105428154 A CN105428154 A CN 105428154A
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- relay
- voltage
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- power consumption
- circuit
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
Abstract
The invention relates to a direct-current electromagnetic relay drive circuit and a drive method therefor. The drive circuit comprises a voltage source, a closed circuit and a power consumption suppression circuit, wherein the relay is arranged between the voltage source and the closed circuit; the power consumption suppression circuit is arranged between the voltage source and the relay; the voltage source is used for providing a direct-current power supply voltage which is higher than a rated voltage value of a relay coil; the closed circuit comprises a drive transistor; the transistor is conducted on the basis of a drive control signal for closing the relay, so that a current path is provided for electrifying the relay coil; the power consumption suppression circuit comprises an energy storage capacitor and a power consumption suppression resistor; the energy storage capacitor is used for storing the power supply voltage before the drive transistor is conducted, and releasing the stored voltage to the relay coil after the drive transistor is conducted; and the power consumption suppression resistor is arranged to suppress the voltage of the coil no more than a rated value after the current of the coil reaches the rated value.
Description
Technical field
The present invention relates to electronic device design and manufacture field, be specifically related to a kind of DC electromagnetic type relay drive circuit for break-make of powering, signal controlling and driving method thereof.
Background technology
Relay have electromagnetic type relay and solid-state relay (semiconductor device) point.The current characteristics that electromagnetic type relay needs according to its relay coil, is divided into again alternating current electromagnetic relay and two kinds, DC electromagnetic type relay.What discuss herein is control to DC electromagnetic type relay.
In the control etc. of electric energy and power conversion and signal, often use DC electromagnetic type relay and contactor, for controlling the break-make of big current signal or playing the effect of signal electrical isolation.
DC electromagnetic type relay construction as shown in Figure 1, comprises: the parts such as housing 1, spring 2, armature 3, electromagnet 4 and contact.Wherein, contact comprises common port contact COM, normally opened contact NO and normally-closed contact NC.
Make the DC electromagnetic type actuating of relay, need to apply direct voltage at electromagnet coil, thus on electromagnet coil generation current, attract the action of armature band moving contact when electric current reaches certain numerical value electromagnet.
Due to direct voltage be added in coil two ends time, the electric current of generation is determined by the resistance of the copper coil on electromagnet.Because the resistivity of copper is very little, for reducing coil loss, the making necessarily fine rule multi-turn of coil, so, the electromagnet of relay, in substance form inductance.
As shown in Figure 2, this drive circuit forms primarily of driving transistors device V1 and earial drainage diode D1 traditional relay drive circuit.Driving transistors device V1 provides current path for coil electricity, and earial drainage diode D1 provides current drain path for coil blackout.
But due to the existence of coil inductance, when closed and disconnected, coil inductance suppresses the change of electric current, make adhesive close off delay and strengthen.Therefore traditional electromagnetic type relay drive circuit adhesive and opening speed are slow, Shortcomings.
Electromagnetic type relay work time delay can bring following infringement:
(1) time delay process can make relay contact in an interim state, and the relay contact arc time can be caused in power circuit to increase, and actuating of relay loss is strengthened, and aggravation contact is aging, thus affects relay life.
(2) electromagnetic type relay is when being used as power change-over switch, and adhesive time delay is greater than 10 milliseconds of meetings and causes power consumption equipment power-off; Off delay is crossed conference and is caused protection to slow, and even causes electric short circuit during use in parallel.
(3) electromagnetic type relay is when being used as signal switching, and the real-time variation that conference causes signal to transmit is crossed in time delay, affects signal conveying function.
Therefore, how to improve adhesive and the opening speed of electromagnetic type relay, extend relay life, improve the reliability of electric equipment, reducing signal and transmit time delay, is have problem to be solved.
Summary of the invention
Based on the above-mentioned technical problem existed in prior art, the present invention proposes a kind of DC electromagnetic type relay drive circuit and driving method thereof, with solve that electromagnetic type relay in prior art drives process to exist one or more described in technical problem.
In order to realize object of the present invention, the invention provides a kind of drive circuit of DC electromagnetic type relay, described relay drive circuit comprises: voltage source, closed circuit and power consumption suppress circuit, relay is placed between described voltage source and closed circuit, and described power consumption suppresses circuit to be placed between described voltage source and described relay;
Wherein, described voltage source is for providing the direct current supply voltage of the load voltage value higher than relay coil;
Described closed circuit comprises driving transistors, the conducting based on the drive control signal for closed described relay of this transistor, thus provides current path for described relay coil is energized;
Described power consumption suppresses circuit to comprise energy storage capacitor and power consumption suppresses resistance, described energy storage capacitor is used for storing described supply power voltage before described driving transistors conducting, and after described driving transistors conducting, the voltage stored is discharged to described relay coil, described power consumption suppresses resistance to be provided so that after coil current reaches rated value, suppresses coil voltage to be no more than rated value.
Preferably, described drive circuit also comprises breaking circuit, described breaking circuit is used at described driving transistors based on the drive control signal for disconnecting described relay after disconnecting, reverse voltage is applied to described relay coil, the decline of control relay coil current, thus turn off described relay.
Preferably, described closed circuit also comprises the current-limiting resistance of connecting with described driving transistors.
Preferably, described power consumption suppresses resistance and described relay to be connected in series, and described energy storage capacitor one end is connected to described power consumption and suppresses between resistance and described relay, other end ground connection.
Preferably, described power consumption suppresses the resistance of resistance to meet following formula:
wherein, R1 is the resistance that described power consumption suppresses resistance, and Uc is supply power voltage, and Un is relay rated coil voltage, and Rn is the DC resistance of coil.
Preferably, R1=1.5Rn, but be not limited to this example.
Preferably, described breaking circuit comprises back-pressure catching diode, and the voltage stabilizing value of described back-pressure catching diode is more than or equal to described supply power voltage.
Preferably, described in the transistor AND gate that a section of described back-pressure catching diode is connected to described closed circuit between relay, other end ground connection.
According to another aspect, the present invention also provides a kind of method driving DC electromagnetic type relay, and the method comprises the following steps:
The direct current supply voltage of the load voltage value higher than relay coil is provided by voltage source;
The capacitor of circuit is suppressed to store described direct current supply voltage by described power consumption, and described direct current supply voltage is discharged to described relay coil after the driving transistors conducting of described closed circuit, for described relay coil energising provides current path, thus closed described relay; And
Suppress the power consumption of circuit to suppress resistance after coil current reaches rated value by described power consumption, suppress coil voltage to be no more than rated value.
Preferably, based on the drive control signal for disconnecting described relay apply reverse voltage to described relay coil, the decline of control relay coil current, thus turn off described relay after disconnecting at described driving transistors.
According to the present invention, following effect can be had: the adhesive and the opening speed that improve electromagnetic type relay, extend relay life, improves the reliability of electric equipment, reduce signal and transmit time delay.
Attendant advantages of the present invention, object, and feature will will partly be set forth in the following description, and hereafter will become obvious to rear section for those of ordinary skill in the art studying, or can know according to practice of the present invention.Object of the present invention and other advantage can be implemented to by the structure specifically noted in written explanation and claims and accompanying drawing thereof and be obtained.
It will be appreciated by those skilled in the art that the object that can realize with the present invention and advantage be not limited to above concrete described in, and according to the above and other object that following detailed description will more clearly be understood the present invention and can realize.
Accompanying drawing explanation
With reference to the following drawings, many aspects of the present invention will be understood better.Part in accompanying drawing is not necessarily proportional, focuses on clearly exemplifying principle of the present invention.In accompanying drawing:
Fig. 1 is the schematic diagram of existing DC electromagnetic type relay;
Fig. 2 is the drive circuit schematic diagram of existing DC electromagnetic type relay; And
Fig. 3 is the drive circuit schematic diagram of DC electromagnetic type relay in embodiment of the present invention.
Embodiment
Below, the preferred embodiment of the present invention is described in detail.The example of these preferred implementations illustrates in the accompanying drawings.Shown in accompanying drawing and the embodiments of the present invention described with reference to the accompanying drawings be only exemplary, and technical spirit of the present invention and main operation thereof are not limited to these execution modes.
At this, also it should be noted that, in order to avoid the present invention fuzzy because of unnecessary details, illustrate only in the accompanying drawings with according to the closely-related structure of the solution of the present invention and/or treatment step, and eliminate other details little with relation of the present invention.
The present invention has made improvement to conventional driving circuit, and the basis increasing a small amount of low cost components and parts is improved adhesive and the opening speed of electromagnetic type relay, extends relay life, improves the reliability of electric equipment, reduces signal and transmits time delay.
Fig. 3 is the drive circuit schematic diagram of DC electromagnetic type relay in embodiment of the present invention.As shown in Figure 3, this drive circuit comprises: voltage source Vcc, high-voltage high-speed attraction circuit (closed circuit) 10, the quick open circuit 20 of back-pressure and power control circuit 30.
Voltage source Vcc is for providing the direct current supply voltage U c of the load voltage value higher than relay coil.
High-voltage high-speed closed circuit 10 is by applying the direct voltage higher than rated value to relay coil, reduce the inhibitory action that relay coil inductance rises to electric current, make control electric current (electric current of relay coil) increase fast, realize relay quick pick-up.In an embodiment of the present invention, high-voltage high-speed closed circuit 10 can comprise driving transistors V1 and the shunt resistance R2 with this transistor series.Transistor V1 conducting based on the drive control signal for closed described relay, for providing current path for described relay coil energising, and disconnects based on the drive control signal for disconnecting relay.Transistor shown in Fig. 3 is NPN transistor, but the present invention is not existing in this, can also be PNP transistor.
The quick breaking circuit 20 of back-pressure, by applying reverse voltage to relay coil, reduces the inhibitory action that coil inductance declines to electric current, control electric current is declined fast, realizes disconnecting fast.In embodiments of the present invention, breaking circuit can comprise back-pressure catching diode, and the voltage stabilizing value of this back-pressure catching diode is more than or equal to supply power voltage.After driving transistors V1 disconnects based on drive control signal, apply reverse voltage to relay coil, the decline of control relay coil current, thus turn off described relay.
Power consumption suppresses circuit 30 to comprise power consumption and suppresses resistance R1 and storage capacitor C1, and wherein power consumption suppresses resistance and relay to be connected in series, and energy storage capacitor one end is connected to power consumption and suppresses between resistance and relay, other end ground connection.Storage capacitor C1 provides relay quick pick-up institute energy requirement, and after power consumption suppresses resistance R1 to make coil current reach rated value, coil voltage is no more than rated value, and protection relay coil power dissipation is in rated range.
In embodiment of the present invention, supply power voltage Uc is higher than relay rated coil voltage Un, and preferably adopt two times of load voltage values as supply power voltage Uc, i.e. Uc=2Un, this voltage value is only example, and the present invention is not limited to this.Be disconnect at relay adhesive front wheel driving transistor V1, high voltage supply voltage is charged to storage capacitor C1, until the voltage of electric capacity C1 reaches high voltage supply voltage by resistance R1.
When relay needs adhesive, make driving transistors V1 conducting by drive control signal In, the high pressure on storage capacitor C1 is added in relay coil two ends, coil current raises fast, storage capacitor C1 discharges, and capacitance voltage reduces gradually, relay adhesive when electric current reaches adhesive operating current.Because ER effect is large after relay adhesive, storage capacitor voltage reduces rapidly, until when equaling coil current by the electric current of resistance R1, capacitance voltage reaches stationary value.
The selection of power consumption constraints resistance R1 resistance should meet following formula:
wherein, Rn is the resistance value of coil, and Uc is supply power voltage, and Un is relay rated coil voltage.Preferably, R1=1.5Rn, but be not limited to this.When Uc=2Un, R1=1.5Rn, the voltage 0.8Un at relay coil two ends, coil power dissipation is 0.64 times of rated disspation, and coil loss is in safe range.
When relay needs to disconnect, by drive control signal In, driving transistors V1 is disconnected, relay coil electric current flows into clamper voltage stabilizing didoe Z1, clamp diode voltage stabilizing value Z1 is greater than and equals supply power voltage, preferably select 3Un value, this value is only example, and the present invention is not limited to this.Before relay disconnects, voltage on storage capacitor C1 is 0.8Un, and the relay coil other end is connected with clamper voltage stabilizing didoe, the voltage stabilizing value of voltage stabilizing didoe is such as 3Un, the voltage be now added on relay coil is negative 2.2Un, coil current reduces rapidly, and when electric current is less than turn-off current, relay disconnects.After electric current is reduced to zero, voltage stabilizing didoe disconnects, and coil current maintains zero, and relay maintains off-state.
According to embodiment of the present invention, by applying the direct voltage higher than rated value to relay coil, reduce the inhibitory action that relay coil inductance rises to electric current, make control electric current increase fast, realize relay quick pick-up.By applying reverse voltage to relay coil, reducing the inhibitory action that relay coil inductance declines to electric current, control electric current is declined fast, realize disconnecting fast.Power consumption suppresses the storage capacitor of circuit to provide the energy of the high voltage needed for relay quick pick-up, and after power consumption suppresses resistance to make coil current reach rated value, coil voltage is no more than rated value, and protection relay coil power dissipation is in rated range.
Therefore, DC electromagnetic type drive circuit of the present invention can improve adhesive and the opening speed of electromagnetic type relay, extends relay life, improves the reliability of electric equipment, reduces signal and transmits time delay.
By comparative example parameter, effect of the present invention will be described below.
It is the parameter of common DC electromagnetic type relay in table 1.
Table 1.
For the relay of above parameter, table 2 gives the action delay contrast table adopting traditional relay drive circuit and drive circuit of the present invention.
Table 2.
Visible by upper table, DC electromagnetic type relay drive circuit of the present invention can significantly improve adhesive and the opening speed of electromagnetic type relay, thus can extend relay life, and improves the reliability of electric equipment.
It should be noted that, above-described embodiment is only and the present invention and unrestricted the scope of the claims of the present invention is described, any based on equivalents technology of the present invention, all should in scope of patent protection of the present invention.
Claims (9)
1. the drive circuit of a DC electromagnetic type relay, it is characterized in that, described relay drive circuit comprises: voltage source, closed circuit and power consumption suppress circuit, relay is placed between described voltage source and closed circuit, and described power consumption suppresses circuit to be placed between described voltage source and described relay;
Wherein, described voltage source is for providing the direct current supply voltage of the load voltage value higher than relay coil;
Described closed circuit comprises driving transistors, the conducting based on the drive control signal for closed described relay of this transistor, thus provides current path for described relay coil is energized;
Described power consumption suppresses circuit to comprise energy storage capacitor and power consumption suppresses resistance, described energy storage capacitor is used for storing described supply power voltage before described driving transistors conducting, and after described driving transistors conducting, the voltage stored is discharged to described relay coil, described power consumption suppresses resistance to be provided so that after coil current reaches rated value, suppresses coil voltage to be no more than rated value.
2. drive circuit according to claim 1, it is characterized in that, described drive circuit also comprises breaking circuit, described breaking circuit is used at described driving transistors based on the drive control signal for disconnecting described relay after disconnecting, reverse voltage is applied to described relay coil, the decline of control relay coil current, thus turn off described relay.
3. drive circuit according to claim 1, is characterized in that, described closed circuit also comprises the current-limiting resistance of connecting with described driving transistors.
4. drive circuit according to claim 1, is characterized in that, described power consumption suppresses resistance and described relay to be connected in series, and described energy storage capacitor one end is connected to described power consumption and suppresses between resistance and described relay, other end ground connection.
5. drive circuit according to claim 2, is characterized in that, described power consumption suppresses the resistance of resistance to meet following formula:
wherein, R1 is the resistance that described power consumption suppresses resistance, and Uc is supply power voltage, and Un is relay rated coil voltage, and Rn is the DC resistance of coil.
6. drive circuit according to claim 2, is characterized in that, described breaking circuit comprises back-pressure catching diode, and the voltage stabilizing value of described back-pressure catching diode is more than or equal to described supply power voltage.
7. drive circuit according to claim 6, is characterized in that, described in the transistor AND gate that a section of described back-pressure catching diode is connected to described closed circuit between relay, and other end ground connection.
8. utilize the drive circuit as described in claim 1-7 to drive a method for DC electromagnetic type relay, it is characterized in that, said method comprising the steps of:
The direct current supply voltage of the load voltage value higher than relay coil is provided by voltage source;
The capacitor of circuit is suppressed to store described direct current supply voltage by described power consumption, and described direct current supply voltage is discharged to described relay coil after the driving transistors conducting of described closed circuit, for described relay coil energising provides current path, thus closed described relay;
Suppress the power consumption of circuit to suppress resistance after coil current reaches rated value by described power consumption, suppress coil voltage to be no more than rated value.
9. driving method according to claim 8, is characterized in that, described method also comprises:
, based on the drive control signal for disconnecting described relay apply reverse voltage to described relay coil, the decline of control relay coil current, thus turn off described relay after disconnecting at described driving transistors.
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| CN201510883741.3A CN105428154A (en) | 2015-12-04 | 2015-12-04 | Direct-current electromagnetic relay drive circuit and drive method therefor |
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| CN201510883741.3A CN105428154A (en) | 2015-12-04 | 2015-12-04 | Direct-current electromagnetic relay drive circuit and drive method therefor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252158A (en) * | 2016-09-19 | 2016-12-21 | 北京新能源汽车股份有限公司 | A kind of electromagnetic relay circuit |
| CN107473031A (en) * | 2017-07-17 | 2017-12-15 | 江苏科技大学 | A kind of gateway doorway machine, which is swiped the card, opens the door and calls the circuit and implementation method of elevator |
| CN111863540A (en) * | 2020-08-10 | 2020-10-30 | 上海沪工汽车电器有限公司 | High-voltage direct-current relay for vehicle |
| CN112582208A (en) * | 2019-09-30 | 2021-03-30 | 罗克韦尔自动化技术公司 | Relay coil drive circuit |
| CN113192792A (en) * | 2021-04-12 | 2021-07-30 | 厦门芯阳科技股份有限公司 | Improved method for driving on-off of relay |
| CN113871252A (en) * | 2021-09-13 | 2021-12-31 | 深圳英飞源技术有限公司 | Relay drive circuit |
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| CN103065871A (en) * | 2013-01-09 | 2013-04-24 | 深圳市元征软件开发有限公司 | Realizing circuit capable of reducing power consumption of electromagnetic relay |
| CN105047476A (en) * | 2015-06-15 | 2015-11-11 | 成都广迈科技有限公司 | Low-power-consumption relay control circuit |
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| CN102231347A (en) * | 2010-08-08 | 2011-11-02 | 浙江上方光伏科技有限公司 | Low-power relay with high breaking capacity |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252158A (en) * | 2016-09-19 | 2016-12-21 | 北京新能源汽车股份有限公司 | A kind of electromagnetic relay circuit |
| CN107473031A (en) * | 2017-07-17 | 2017-12-15 | 江苏科技大学 | A kind of gateway doorway machine, which is swiped the card, opens the door and calls the circuit and implementation method of elevator |
| CN112582208A (en) * | 2019-09-30 | 2021-03-30 | 罗克韦尔自动化技术公司 | Relay coil drive circuit |
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| CN111863540A (en) * | 2020-08-10 | 2020-10-30 | 上海沪工汽车电器有限公司 | High-voltage direct-current relay for vehicle |
| CN113192792A (en) * | 2021-04-12 | 2021-07-30 | 厦门芯阳科技股份有限公司 | Improved method for driving on-off of relay |
| CN113871252A (en) * | 2021-09-13 | 2021-12-31 | 深圳英飞源技术有限公司 | Relay drive circuit |
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Application publication date: 20160323 |