CN110323099A - Contactor controller circuit structure - Google Patents
Contactor controller circuit structure Download PDFInfo
- Publication number
- CN110323099A CN110323099A CN201910567505.9A CN201910567505A CN110323099A CN 110323099 A CN110323099 A CN 110323099A CN 201910567505 A CN201910567505 A CN 201910567505A CN 110323099 A CN110323099 A CN 110323099A
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- Prior art keywords
- circuit
- oxide
- metal
- semiconductor
- resistor
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- 239000004065 semiconductor Substances 0.000 claims abstract description 32
- 238000005070 sampling Methods 0.000 claims abstract description 28
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 230000006837 decompression Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention discloses a kind of contactor controller circuit structures, including the rectification circuit being connected, voltage sampling circuit, DC-DC reduction voltage circuit, metal-oxide-semiconductor driving circuit, current sampling circuit and control unit circuit, the current sampling circuit includes contactor coil, metal-oxide-semiconductor and first resistor, the current sampling circuit is connected with the rectifying circuit by contactor coil, the end the metal-oxide-semiconductor G is connect with metal-oxide-semiconductor driving circuit, the end the metal-oxide-semiconductor D and contactor coil are electrically connected to form the connection with rectification circuit, the ground connection setting of the end the metal-oxide-semiconductor S, the first resistor is connected between the end metal-oxide-semiconductor S and ground wire, the first resistor resistance value is set as 4 ~ 6 Ω, diode is parallel in the first resistor, described control unit circuit is electrically connected to form with first resistor connects current signal It receives and detects.Its structure is more simple, reduces amplifier and periphery circuit, so that route is more succinct, performance is higher, manufacturing cost is also lower.
Description
Technical field
The present invention relates to contactor control circuit technical field, especially a kind of electronic contactor controller circuitry knot
Structure.
Background technique
Electronic contactor controller circuit structure is usually made of following six part, including rectification circuit, voltage sample
Circuit, DC-DC reduction voltage circuit, metal-oxide-semiconductor driving circuit, current sampling circuit and control unit circuit, existing electronic type contact
Device, current sampling circuit therein all can be in the pole the metal-oxide-semiconductor S series connection lesser sampling resistors of resistance value, and general resistance value is in 0.1 Ω to 1
Ω, so that coil current is sampled, as shown in figure, R12, R13 therein ' it is sampling resistor, then pass through fortune again
It puts after U2 amplifies signal, output PWM maintains adhesive action after carrying out sampling processing to CUP；But under low-voltage cage very
The internal resistance of more contactor coils only has 1 Ω or so, just must be sampling in order to obtain bigger magnetomotive force when total power is attracted
Signal resistance R14, R13 ' resistance value reduce, resistance reduces, so that electric current increases when total power is attracted, magnetomotive force also increases therewith
Greatly, but maintain when only have by the electric current of coil it is several to more than ten mA so that the voltage on sampling resistor is at very low water
Flat, CPU can not sample signal, at this moment can only carry out amplified signal by amplifier and CPU is allowed to carry out signal acquisition, in this way
Design so that, circuit is not succinct enough, is attracted that there is also unstability, the reduced performance of integrated circuit, costs at low voltage
It is higher.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of contactor controller circuit structure, and structure is more simple,
Reduce amplifier and periphery circuit, so that route is more succinct, performance is higher, manufacturing cost is also lower.
The present invention provides a kind of contactor controller circuit structure, including be connected rectification circuit, voltage sampling circuit,
DC-DC reduction voltage circuit, metal-oxide-semiconductor driving circuit, current sampling circuit and control unit circuit, the current sampling circuit include connecing
Tentaculum coil, metal-oxide-semiconductor and first resistor, the current sampling circuit are connected with the rectifying circuit by contactor coil, the MOS
The end pipe G is connect with metal-oxide-semiconductor driving circuit, and the end the metal-oxide-semiconductor D and contactor coil are electrically connected to form the connection with rectification circuit,
The ground connection setting of the end the metal-oxide-semiconductor S, the first resistor are connected between the end metal-oxide-semiconductor S and ground wire, and the first resistor resistance value is set
4 ~ 6 Ω are set to, diode is parallel in the first resistor, described control unit circuit and first resistor are electrically connected to form to electricity
Flow the reception and detection of signal.
The present invention is further arranged to also be parallel with capacitor in the first resistor.
The present invention is further arranged to the first resistor resistance value and is set as 5 Ω.
The present invention is further arranged to be also connected with second resistance between described control unit circuit and first resistor.
The beneficial effect being arranged in this way is: using the above scheme, structure is more simple, reduces amplifier and object-line
Road, so that route is more succinct, performance is higher, manufacturing cost is also lower, rectification circuit therein, voltage sampling circuit, DC-DC drop
Volt circuit, metal-oxide-semiconductor driving circuit and control unit circuit, are existing configuration, and improvement of the present invention is current sample
Route, and original current sampling circuit is replaced, while existing rectification circuit, voltage sampling circuit, DC-DC reduction voltage circuit, metal-oxide-semiconductor
Constant with the wiring point of current sampling circuit in driving circuit and control unit circuit, replacement is simple, reduces alternative costs, is conducive to
It realizes, improves the using effect of the circuit.
It is described further with reference to the accompanying drawings of the specification with embodiment.
Detailed description of the invention
Fig. 1 is present invention contactor controller circuit structure diagram in the prior art；
Fig. 2 is the circuit diagram of the embodiment of the present invention.
Specific embodiment
A kind of contactor controller circuit structure is disclosed as seen from Figure 2, including rectification circuit, the voltage being connected
Sample circuit, DC-DC reduction voltage circuit, metal-oxide-semiconductor driving circuit, current sampling circuit and control unit circuit, the current sample
Circuit includes contactor coil L2, metal-oxide-semiconductor and first resistor R13, the current sampling circuit by contactor coil L2 with it is whole
Current circuit connection, the end the metal-oxide-semiconductor G are connect with metal-oxide-semiconductor driving circuit, and the end the metal-oxide-semiconductor D is electrically connected shape with contactor coil L2
At the connection with rectification circuit, the ground connection setting of the end the metal-oxide-semiconductor S, the first resistor R13 be connected to the end metal-oxide-semiconductor S and ground wire it
Between, the first resistor R13 resistance value is set as 5 Ω, is parallel with diode D6, described control unit on the first resistor R13
Circuit and first resistor R13 are electrically connected to form reception and detection to current signal.Electricity is also parallel on the first resistor R13
Hold C6.Second resistance R15 is also connected between described control unit circuit and first resistor R13.
Under high-power actuation static state, it is assumed that contactor coil L2 internal resistance is 1 Ω on DC-DC reduction voltage circuit, works as electricity
When source, that is, vcc is 16V, the voltage of A point position is about 0.3V or so when total power is attracted such as in Fig. 2, contactor coil L2 and
The voltage at metal-oxide-semiconductor both ends is about 15.7V, and the electric current by contactor coil L2 is about 15A, the electromagnet magnetomotive force of formation be E=
NI.And in available circuit, in circuit as shown in Figure 1, when total power is attracted, the voltage of A ' point is about the 1/3 of VCC, contactor
Coil L2 ' and the voltage at metal-oxide-semiconductor both ends are 11V, and the electric current by contactor coil L2 is about 11A, and the magnetomotive force of electromagnet is
E'=NI'.E is significantly greater than E ', it is clear that the big the suction-combining force of magnetomotive force it is also big.Obviously by improved route big
When power is attracted and the size of sampling resistor is almost without relationship.
When being maintained under small-power state, electronic contactor when maintaining to be attracted by the electric current of contactor coil L2 all
It is smaller, generally in several to more than ten mA.In the prior art, i.e., the two of Fig. 1 sampling resistor R13 ', R14 only have 1 Ω, it is assumed that
Pass through R13 ', the electric current of R14 is 10mA.According to Ohm's law R14, R13 ' on voltage 0.5*0.01=0.005V be about 5mV,
Here voltage is RMS value, and peak value can be in 10mV or so, so needing to amplify by amplifier, control chip could sample place
Reason.After improvement, first resistor R13 is 5 Ω, it is assumed that the electric current by R13 is 10mA.According to the voltage 5* on Ohm's law R13
0.01=0.05V is about 50mV, and voltage here is RMS value, and peak value is about in 100mV, so there is no need to amplify by amplifier,
Controlling chip can direct sampling processing.An amplifier and some peripheral circuits are eliminated than original design.
Capacitor C6, effect of this capacitor in this route is also very big, and when PWM is maintained, MOS conducting immediate current is very big,
In no capacitor C6, the voltage of A point position can rise quickly, and moment will be raised to 0.3V or more, so that diode in Fig. 2
D6 is connected, and electric current is bigger after the diode current flow, so that power remains unstable.After capacitor C6 is set, when PWM is maintained
The voltage of MOS conducting moment A point position has the process slowly risen, and PWM need to only tie up the crest voltage of A point when adjusting
It holds in 100mV or so.Diode D6 would not be connected in this way, and the electric current by first resistor R13 is exactly the maintenance electric current of coil.
Here high current is cleverly realized by the characteristic of diode to be attracted and two different circuits of low current maintenance.
The above embodiments are merely a preferred embodiment of the present invention, and cannot limit interest field of the invention with this, because
This, is still belonged to according to equivalent variations made by scope of the present invention patent, such as using similar technique, the equivalent product of similar structures
The range that the present invention is covered.
Claims (4)
1. a kind of contactor controller circuit structure, including rectification circuit, voltage sampling circuit, DC-DC the decompression electricity being connected
Road, metal-oxide-semiconductor driving circuit, current sampling circuit and control unit circuit, it is characterised in that: the current sampling circuit includes connecing
Tentaculum coil, metal-oxide-semiconductor and first resistor, the current sampling circuit are connected with the rectifying circuit by contactor coil, the MOS
The end pipe G is connect with metal-oxide-semiconductor driving circuit, and the end the metal-oxide-semiconductor D and contactor coil are electrically connected to form the connection with rectification circuit,
The ground connection setting of the end the metal-oxide-semiconductor S, the first resistor are connected between the end metal-oxide-semiconductor S and ground wire, and the first resistor resistance value is set
4 ~ 6 Ω are set to, diode is parallel in the first resistor, described control unit circuit and first resistor are electrically connected to form to electricity
Flow the reception and detection of signal.
2. contactor controller circuit structure according to claim 1, it is characterised in that: also parallel connection in the first resistor
There is capacitor.
3. contactor controller circuit structure according to claim 1 or 2, it is characterised in that: the first resistor resistance value
It is set as 5 Ω.
4. contactor controller circuit structure according to claim 1, it is characterised in that: described control unit circuit and
Second resistance is also connected between one resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910567505.9A CN110323099A (en) | 2019-06-27 | 2019-06-27 | Contactor controller circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910567505.9A CN110323099A (en) | 2019-06-27 | 2019-06-27 | Contactor controller circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110323099A true CN110323099A (en) | 2019-10-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910567505.9A Pending CN110323099A (en) | 2019-06-27 | 2019-06-27 | Contactor controller circuit structure |
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| Country | Link |
|---|---|
| CN (1) | CN110323099A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204179946U (en) * | 2014-07-22 | 2015-02-25 | 南京国臣信息自动化技术有限公司 | A kind of coil class load voltage falls proterctive equipment temporarily |
| CN107658181A (en) * | 2017-10-19 | 2018-02-02 | 深圳南云微电子有限公司 | A kind of contactor electricity-saving appliance |
| CN209981109U (en) * | 2019-06-27 | 2020-01-21 | 德力西电气有限公司 | Contactor controller circuit structure |
-
2019
- 2019-06-27 CN CN201910567505.9A patent/CN110323099A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204179946U (en) * | 2014-07-22 | 2015-02-25 | 南京国臣信息自动化技术有限公司 | A kind of coil class load voltage falls proterctive equipment temporarily |
| CN107658181A (en) * | 2017-10-19 | 2018-02-02 | 深圳南云微电子有限公司 | A kind of contactor electricity-saving appliance |
| CN209981109U (en) * | 2019-06-27 | 2020-01-21 | 德力西电气有限公司 | Contactor controller circuit structure |
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