CN113192792A - Improved method for driving on-off of relay - Google Patents
Improved method for driving on-off of relay Download PDFInfo
- Publication number
- CN113192792A CN113192792A CN202110390051.XA CN202110390051A CN113192792A CN 113192792 A CN113192792 A CN 113192792A CN 202110390051 A CN202110390051 A CN 202110390051A CN 113192792 A CN113192792 A CN 113192792A
- Authority
- CN
- China
- Prior art keywords
- relay
- voltage
- current
- driving
- waveform
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000010586 diagram Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
Images
Classifications
-
- 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
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
- H01H47/04—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current
-
- 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
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
-
- 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
- H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
- H01H47/32—Energising current supplied by semiconductor device
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Relay Circuits (AREA)
Abstract
The invention discloses an improved method for driving a relay to be switched on and off, which comprises the following steps: (1) applying a high level for 0.5 to 1 second to one end of the relay to enable the driving voltage to reach 50-120V; (2) applying voltage to the relay for 3-10 ms to make the current reach the rated working current of the relay coil; (3) applying a pulse width modulation waveform with the frequency of 20KHz-50KHz to the other terminal of the relay, wherein the amplitude of the waveform is 50V-120V; (4) when the waveform applied to the high level application terminal of the relay is "high" for a long time, the relay is turned off. Because the voltage applied to the two ends of the relay is higher and the voltage application time is longer, the current of the relay is increased faster, the power-on time is shorter, the duty ratio of the driven PWM signal is smaller, the power consumption is smaller, and the energy consumed by the internal coil of the relay is very small, thereby solving the problems of large power consumption, difficult suction, poor universality and the like caused by the conventional direct current mode for driving the relay to be switched on and off.
Description
Technical Field
The invention relates to the field of relays, in particular to an improved method for driving a relay to be switched on and off.
Background
A conventional method for driving a relay is to drive the relay with dc, in which a required dc voltage (generally 48V dc voltage is applied to a 48V relay, and 24V dc voltage is applied to a 24V relay) is applied to one end of a relay coil connected in parallel with a freewheeling diode, and a corresponding dc level is applied to the other end. When the level of this terminal is "high", no current flows in the internal coil of the relay. At this time, if the relay is of a "normally closed type", the two contacts of the relay are communicated; if the relay is of the "normally open type" the two contacts of the relay are open. When the level of the terminal is 'low', the current flows in the internal coil of the relay, at this time, if the relay is of 'normally closed type', the two contacts of the relay are opened, and if the relay is of 'normally open type', the two contacts of the relay are communicated. In the conventional driving mode, the relay always needs larger direct current in work, the direct current flows through a parasitic resistor in the relay to generate larger electric energy loss, and the loss is generally 360 milliwatts; meanwhile, since a part of energy is lost by the resistor, the reliability of the pull-in of the relay is reduced.
In addition, for the linear step-down power supply, the current flowing through the relay is obtained from the mains supply one by one, and the current required to consume the mains supply is large, so that the power consumption is large. When the PWM duty ratio of the driving relay is 1: 5, the current of the commercial power which needs to be consumed is one fifth of the rated current of the original relay, and the required commercial power current is greatly reduced.
Disclosure of Invention
The invention aims to provide an improved method for driving the on-off of a relay with low power consumption. The method can make the relay easy to be attracted and have better universality.
In order to achieve the purpose, the technical solution of the invention is as follows:
the invention relates to an improved method for driving a relay to be switched on and off, which comprises the following steps: (1) applying a high level for 0.5 to 1 second to one end of the relay to gradually increase the driving voltage to reach a voltage of 50-120V; (2) when the relay is stable, the relay is started, voltage is applied to the relay for 3-10 milliseconds, and the current reaches the rated working current of a relay coil; (3) applying a pulse width modulation waveform with the frequency of 20KHz-50KHz to the other terminal of the relay, wherein the amplitude of the waveform is 50V-120V, so as to ensure the pull-in of the relay and the required maintained pull-in current after the pull-in; (4) when the waveform applied to the high level application terminal of the relay is "high" for a long time, the relay is turned off.
In the step (3), the duty ratio of the pulse width modulation waveform is 1: 2-1: 10.
after the scheme is adopted, when the relay is powered on, the voltage applied to the two ends of the relay is higher than the rated voltage of the relay, the maximum current Im is higher than the rated working current of the relay, the current rise of a relay coil (the current when an inductance coil is in short circuit is basically determined by the specification of the relay) is faster, the voltage applied to the two ends of the relay is higher and the voltage application time is longer, namely 3-10 milliseconds, the faster the relay current is increased, the power on time is shorter, the duty ratio of a driving PWM signal is smaller, the power consumption is smaller, the energy consumed by an internal coil of the relay is very small, and the problems of large power consumption, difficulty in suction, poor universality and the like caused by the conventional direct current mode for driving the relay to be powered on and off are solved.
The invention is further described with reference to the following figures and specific embodiments.
Drawings
FIG. 1 is a schematic diagram of a relay drive circuit of the present invention;
fig. 2 is a diagram of a pulse width modulation waveform used in the present invention.
Detailed Description
Fig. 1 is a schematic diagram of a relay driving circuit according to the present invention, wherein the positive pole of the working power supply of the relay is applied to one end of the relay, for example, RYVCC, the PWM end of the other end of the relay is driven by a triode or a MOS transistor, so that the PWM end is connected to or disconnected from the negative pole of the working power supply of the relay, the D1 diode is a freewheeling diode, and when the PWM end of the relay is disconnected from the negative pole of the working power supply of the relay, the current on the coil of the relay forms a loop through the D1 diode, thereby maintaining the current of the coil of the relay and keeping the relay in stable and reliable operation.
Example 1:
the utility model relates to an improvement method of drive relay break-make, including following step: (1) applying a high level for 0.5 second to one end of the relay to gradually increase the driving voltage to reach 50V; (2) when the relay is stabilized, starting the relay, applying voltage to the relay, wherein the voltage application time t2 is 3 milliseconds (as shown in fig. 2), so that the current reaches the rated working current of the relay coil; (3) immediately after applying a pulse width modulation waveform with the frequency of 20KHz to the other terminal of the relay, the duty ratio of the pulse width modulation waveform is 1: 2, the amplitude of the waveform is 50V to ensure the pull-in of the relay and the required maintained pull-in power after the pull-in; (4) when the waveform applied to the high level application terminal of the relay is "high" for a long time, the relay is turned off.
Example 2:
the utility model relates to an improvement method of drive relay break-make, including following step: (1) applying a high level for 1 second to one end of the relay to gradually increase the driving voltage to reach a voltage of 120V; (2) after the relay is stabilized, starting the relay, applying voltage to the relay, wherein the voltage application time t2 is 10 milliseconds (as shown in fig. 2), so that the current reaches the rated working current of the relay coil; (3) immediately after applying a pulse width modulation waveform with the frequency of 50KHz to the other terminal of the relay, the duty ratio of the pulse width modulation waveform is 1: 10, the amplitude of the waveform is 120V so as to ensure the pull-in of the relay and the required maintained pull-in power after the pull-in; (4) when the waveform applied to the high level application terminal of the relay is "high" for a long time, the relay is turned off.
Example 3:
the utility model relates to an improvement method of drive relay break-make, including following step: (1) applying a high level of 8 seconds for 0.8 second to one end of the relay to gradually increase the driving voltage to reach a voltage of 80V; (2) when the relay is stabilized, starting the relay, applying voltage to the relay, wherein the voltage application time t2 is 6 milliseconds (as shown in fig. 2), so that the current reaches the rated working current of the relay coil; (3) immediately after applying a pulse width modulation waveform with the frequency of 35KHz to the other terminal of the relay, the duty ratio of the pulse width modulation waveform is 1: 6, the amplitude of the waveform is 80V to ensure the pull-in of the relay and the required maintained pull-in power after the pull-in; (4) when the waveform applied to the high level application terminal of the relay is "high" for a long time, the relay is turned off.
The pulse width modulation driving mode and the traditional direct current driving mode adopting the invention have the remarkable characteristics that: the driving of the relay is divided into four stages, which are respectively controlled by corresponding waveforms.
The first stage is as follows: the high level of 0.5-1.0 second is used to increase the driving voltage and reduce the driving current, so as to meet the requirement of the pull-in power of the relay.
And a second stage: when the relay is stabilized, the relay is started, voltage is applied to the relay, and the voltage application time t2 is 3-10 milliseconds (as shown in fig. 2), so that the current reaches the rated working current of the relay coil.
And a third stage: the power source is driven by a pulse width modulation waveform with the amplitude of Vin being 50V-120V and the frequency being 20KHz-50KHz so as to meet the requirements of attraction of the relay and the maintenance of power after attraction.
A fourth stage: and the relay is controlled to be switched off by high level.
The working principle of the invention is as follows:
when the relay is electrified, the voltage applied to the two ends of the relay is higher than the rated voltage of the relay when the relay is electrified, the maximum current Im is higher than the rated working current of the relay, the current rise of a relay coil (the current when an inductance coil is in short circuit is basically determined by the specification of the relay) is faster, the voltage applied to the two ends of the relay is higher, the voltage application time is longer and is 3-10 milliseconds, the faster the relay current is increased, the electrifying time is shorter, the smaller the duty ratio of a PWM signal to be driven is, the smaller the power consumption is, and the energy consumed by an internal coil of the relay is very small. Such as: when the PWM duty ratio of the driving relay is 1: 5, the current of the commercial power which needs to be consumed is one fifth of the rated current of the original relay, and the required commercial power current is greatly reduced.
It should be noted that: since a higher voltage is required for the withstand voltage of the elements in the circuit, the drive voltage of the relay and the frequency and duty ratio of the drive PWM are determined according to the actual circuit.
Claims (2)
1. An improved method for driving a relay to be switched on and off comprises the following steps: (1) applying a high level for 0.5 to 1 second to one end of the relay to gradually increase the driving voltage to reach a voltage of 50-120V; (2) when the relay is stable, the relay is started, voltage is applied to the relay for 3-10 milliseconds, and the current reaches the rated working current of a relay coil; (3) applying a pulse width modulation waveform with the frequency of 20KHz-50KHz to the other terminal of the relay, wherein the amplitude of the waveform is 50V-120V, so as to ensure the pull-in of the relay and the required pull-in maintaining power after the pull-in; (4) when the waveform applied to the high level application terminal of the relay is "high" for a long time, the relay is turned off.
2. The improved method of claim 1 for switching drive relays, characterized in that: in the step (3), the duty ratio of the pulse width modulation waveform is 1: 2-1: 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110390051.XA CN113192792A (en) | 2021-04-12 | 2021-04-12 | Improved method for driving on-off of relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110390051.XA CN113192792A (en) | 2021-04-12 | 2021-04-12 | Improved method for driving on-off of relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113192792A true CN113192792A (en) | 2021-07-30 |
Family
ID=76975504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110390051.XA Pending CN113192792A (en) | 2021-04-12 | 2021-04-12 | Improved method for driving on-off of relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113192792A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022062A (en) * | 2006-02-16 | 2007-08-22 | 刑建力 | Method for driving relay on-off |
| JP2009289671A (en) * | 2008-05-30 | 2009-12-10 | Yazaki Corp | Relay control device |
| CN105225896A (en) * | 2015-10-26 | 2016-01-06 | 青岛鼎信通讯消防安全有限公司 | Bus-powered low-power relay control method |
| CN105428154A (en) * | 2015-12-04 | 2016-03-23 | 北京亚澳博信通信技术有限公司 | Direct-current electromagnetic relay drive circuit and drive method therefor |
| CN206421994U (en) * | 2016-12-22 | 2017-08-18 | 上海比亚迪有限公司 | A kind of relay coil drive circuit controlled based on PWM ripples |
| CN207234696U (en) * | 2017-10-13 | 2018-04-13 | 施耐德电气（中国）有限公司 | A kind of driving device of electromagnetic coil |
-
2021
- 2021-04-12 CN CN202110390051.XA patent/CN113192792A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022062A (en) * | 2006-02-16 | 2007-08-22 | 刑建力 | Method for driving relay on-off |
| JP2009289671A (en) * | 2008-05-30 | 2009-12-10 | Yazaki Corp | Relay control device |
| CN105225896A (en) * | 2015-10-26 | 2016-01-06 | 青岛鼎信通讯消防安全有限公司 | Bus-powered low-power relay control method |
| CN105428154A (en) * | 2015-12-04 | 2016-03-23 | 北京亚澳博信通信技术有限公司 | Direct-current electromagnetic relay drive circuit and drive method therefor |
| CN206421994U (en) * | 2016-12-22 | 2017-08-18 | 上海比亚迪有限公司 | A kind of relay coil drive circuit controlled based on PWM ripples |
| CN207234696U (en) * | 2017-10-13 | 2018-04-13 | 施耐德电气（中国）有限公司 | A kind of driving device of electromagnetic coil |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6714094B2 (en) | Contactor coil control circuit | |
| CN108735552B (en) | Coil control circuit of contactor | |
| CN113192792A (en) | Improved method for driving on-off of relay | |
| CN213236265U (en) | Electromagnetic valve driving control circuit | |
| CN201177091Y (en) | Magnetic valve controller | |
| CN215451283U (en) | Relay control device | |
| CN207676860U (en) | Magnetic latching relay control circuit | |
| CN100514524C (en) | Method for driving relay on-off | |
| CN217788280U (en) | Relay energy-saving driving circuit | |
| CN209981110U (en) | Intelligent switch relay control circuit | |
| CN110931312B (en) | Contactor power-saving control method and control circuit applying same | |
| CN110112037B (en) | Contactor power-saving circuit | |
| CN218769287U (en) | Drive circuit and energy storage equipment | |
| CN218387466U (en) | Delay circuit applied to energy-saving driving of electromagnetic valve | |
| CN102709021A (en) | Control circuit for electromagnet and electromagnetic valve | |
| CN100513849C (en) | Electromagnetic valve driving method | |
| CN214378229U (en) | Energy-saving interference reduction circuit and device of direct current relay | |
| CN214477200U (en) | Circuit for reducing power consumption of relay coil | |
| CN205406397U (en) | Direct current contactor's PWM drive circuit | |
| CN218299707U (en) | Relay drive circuit | |
| CN104467778A (en) | Electromagnetic attraction circuit for industrial sewing machine | |
| CN211149252U (en) | Relay control system | |
| CN219144018U (en) | Relay fast switching control circuit | |
| CN217634159U (en) | Low-power consumption electromagnetic valve control circuit | |
| CN210807108U (en) | Adjustable pulse constant current driving power supply for DC electromagnet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |