CN102184807B - Ultralow-power-consumption and high-efficiency electromagnet control circuit - Google Patents
Ultralow-power-consumption and high-efficiency electromagnet control circuit Download PDFInfo
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Abstract
The invention provides an ultralow-power-consumption and high-efficiency electromagnet control circuit. The ultralow-power-consumption and high-efficiency electromagnet control circuit comprises an electromagnet, a power input processing circuit, a boosting energy storage and feedback control circuit, a control chip micro processing unit (MCU) circuit, an undervoltage detection circuit and a power transistor driving circuit connected with the electromagnet; an external power supply V1 is output to the electromagnet through the power input processing circuit and the boosting energy storage and feedback control circuit; the control chip MCU circuit outputs a boosting switch control signal to the boosting control end of the boosting energy storage and feedback control circuit and inputs a feedback signal output from the feedback output end of the boosting energy storage and feedback control circuit; the input end of the undervoltage detection circuit is connected with the power input processing circuit, and the output end of the undervoltage detection circuit outputs a detection signal to the control chip MCU circuit; and a control signal output from the control chip MCU circuit is input into the control end of the power transistor driving circuit. By the ultralow-power-consumption and high-efficiency electromagnet control circuit, suction of the electromagnet can be started at low voltage; the suction of the electromagnet can be started under a wide voltage range of a battery; moreover, the power consumption is ultralow.
Description
Technical field:
The present invention relates to a kind of control circuit for electromagnet, particularly the high efficiency control circuit for electromagnet of a kind of super low-power consumption.
Background technology:
The application of electromagnet is very extensive, and application all the time, and electromagnet all is to be operated on specified operating voltage and the electric current, this application be the most original, the power consumption maximum and efficient minimum.
Also there is new technology to occur in the recent period, patent documentation for example: 200810202044, be about after the normal moment adhesive of electromagnet, utilize the little electric current of pulse-width modulation low-voltage to keep the technology of electromagnet, this technology has utilized after the electromagnetic actuation success characteristic that can little electric current keeps to come work, thereby saved the bigger electrical power consumed of using, and efficient has obtained tangible lifting.Though this technology has obtained very big progress, but still not most effective, mainly contain 2 points: the first, fail to solve from the specified input voltage aspect of supply power voltage (being input voltage) or electromagnet, still need higher voltage to start; The second, under battery powered situation, fail to solve the problem of the wide power voltage supply of battery.
Summary of the invention:
Purpose of the present invention solves prior art problems exactly, proposes a kind of super low-power consumption high efficiency control circuit for electromagnet.Can low-voltage start electromagnetic actuation, can under battery powered situation, start electromagnetic actuation with wide-voltage range, and power consumption be ultralow.
For achieving the above object, the present invention proposes a kind of super low-power consumption high efficiency control circuit for electromagnet, comprise electromagnet, power supply input processing circuit, energy storage and feedback control circuit and control chip MCU circuit boost, external power supply is transported to electromagnet through power supply input processing circuit, boost energy storage and feedback control circuit successively, described control chip MCU circuit output boosted switch controls signal to the control end that boosts of boost energy storage and feedback control circuit, imports the feedback signal of the feedback output end output of boost energy storage and feedback control circuit.
Boost energy storage and feedback control circuit is responsible for that the low-voltage of input is carried out moment and boosted fast and store high voltage electric energy after boosting, makes circuit in low-voltage input power supply, can provide stored electric energy for the electromagnet of high voltage-rated.Compare with the circuit of direct High Voltage Power Supply, reduce the requirement to the input supply power voltage greatly, improve the efficient of solenoid actuated.Boost energy storage and feedback control circuit to the input low-voltage boost fast and energy storage, and the result fed back to control chip MCU circuit, control chip MCU circuit is controlled beginning and the end of the energy storage work of boosting of boost energy storage and feedback control circuit automatically according to feedback result, make the electromagnetic actuation instant high-voltage produce big electric current, the low voltage sustain electric current is little after the adhesive.
Also can comprise the undervoltage detection circuit of monitoring external power supply power supply situation, its input connects the power supply input processing circuit, and its output output detection signal is to control chip MCU circuit.
Control chip MCU circuit is monitored current supply power voltage by undervoltage detection circuit, adjusts the boosted switch control signal automatically, makes boost energy storage and feedback control circuit all can export suitable high voltage startup electromagnet moment adhesive under different low inputs.By undervoltage detection circuit is set, can not only low-voltage normally start electromagnet, and can extra low voltage normally start electromagnet, can under battery powered situation, normally start electromagnet with wide-voltage range, improve the driving efficient of electromagnet substantially.
Also can comprise the power transistor drive circuit that connects electromagnet, pulse-width modulation control signal or the constant level control signal of the output of its control end input control chip MCU circuit, this control chip MCU circuit is by adhesive or the release of described power transistor drive circuit control electromagnet.
When the adhesive of electromagnet high voltage startup, control chip MCU circuit output constant level controls signal to power transistor drive circuit, makes the moment adhesive of electromagnet high-voltage great-current.When the end of electromagnet high voltage startup, when keeping adhesive, control chip MCU circuit is according to the detection signal of undervoltage detection circuit output, under the situation of power supply abundance, the output pulse width modulator control signal is to power transistor drive circuit, and according to the sufficient degree of power supply, regulates output pulse width automatically; Under the insufficient situation of power supply, the output constant level controls signal to power transistor drive circuit.Work of electromagnet is kept under the electric current ultralow, reduced power consumption, realize the high efficiency utilization to power supply.
The present invention utilizes voltage detecting feedback and MCU program to carry out the co-ordination of timesharing multimode, reduces power consumption and widens the operating on low voltage voltage range.Therefore, can realize the purpose of super low-power consumption and high efficiency drive magnet.
The present invention makes the supply power voltage of electromagnet no longer be confined to specified input voltage range by boost energy storage and feedback control circuit, undervoltage detection circuit and specific MCU algorithm routine, and the present invention can be applicable to the occasion of various low-voltage batteries or electronic power.The present invention is under battery powered situation, can wide-voltage range work, maximal efficiency ground uses the capacity of battery, improve the useful life of battery widely, for the space has been created in the application of electromagnet on hand-held, compact apparatus, for the cause of human energy savings and the reduction of discharging of low charcoal has been made significant contribution.The present invention successful Application in actual product, wherein typically have: can be with No. 5 batteries of 1 joint and in the voltage range of 0.8V-1.5V, with the power of≤0.08W, successfully driving a rated power is the long-term operate as normal of electromagnet of 0.72W (6V/120mA).
Description of drawings:
Fig. 1 is the circuit block diagram of most preferred embodiment of the present invention;
Fig. 2 is the circuit theory diagrams of most preferred embodiment of the present invention;
Fig. 3 is electromagnet voltage and the time service graph of a relation of most preferred embodiment of the present invention.
Embodiment:
The invention will be further described below in conjunction with accompanying drawing and most preferred embodiment.
As shown in Figure 1, most preferred embodiment of the present invention comprises electromagnet 6, power supply input processing circuit 1, energy storage and feedback control circuit 2 boost, undervoltage detection circuit 4, power transistor drive circuit 3 and control chip MCU circuit 5, external power supply V1 is successively through power supply input processing circuit 1, boost energy storage and feedback control circuit 2 transported to electromagnet 6, described control chip MCU circuit 5 output boosted switch control signal to the control end CN2 that boosts of boost energy storage and feedback control circuit 2, import the feedback signal of the feedback output end CN3 output of boost energy storage and feedback control circuit 2, the input of undervoltage detection circuit 4 connects power supply input processing circuit 1, its output CN1 output detection signal is to control chip MCU circuit 5, power transistor drive circuit 3 connects electromagnet 6, pulse-width modulation control signal or the constant level control signal of 5 outputs of its control end CN4 input control chip MCU circuit.
Control chip MCU circuit 5 output boosted switch control signal to the control end CN2 that boosts of boost energy storage and feedback control circuit 2, starting boost energy storage and 2 pairs of ultralow input voltages of feedback control circuit boosts and energy storage fast, control chip MCU circuit 5 detects undervoltage detection circuit 4 simultaneously, detection signal according to its output CN1, automatically adjust the boosted switch control signal, the amplitude of boosting of energy storage and feedback control circuit 2 and energy storage thereby adjustment is boosted, energy storage and feedback control circuit 2 result of will boosting of boosting feeds back to control chip MCU circuit 5 by feedback output end CN3, in a single day control chip MCU circuit 5 receives the feedback signal that the energy storage that boosts has reached required value, just finish to boost energy storage work by boost energy storage and feedback control circuit 2 of the control end CN2 control of boosting, export the control end CN4 that constant level controls signal to power transistor drive circuit 3 simultaneously, the conducting of control power transistor starts the big electric current of instant high-voltage for electromagnet 6 provides.After time-delay a period of time, finish start-up time, control chip MCU circuit 5 detects undervoltage detection circuit 4, with control end CN4 output constant level control signal or the pulse-width modulation control signal of control to power transistor drive circuit 3, for pulse-width modulation control signal, can also regulate its pulsewidth automatically, to regulate the transistorized copped wave width of power, thereby control is input to the current energy of electromagnet 6, keeps little electric current for electromagnet 6 provides, and the time-delay of holding time finishes back release magnet 6 automatically.
As shown in Figure 2, power supply input processing circuit 1 comprises current rectifying and wave filtering circuit and the voltage stabilizing circuit that is connected in series successively.Wherein: current rectifying and wave filtering circuit is diode halfwave rectifier filter circuit, comprises rectifier diode D1 and the filter capacitor C1, the C2 that are connected its output, and voltage stabilizing circuit comprises low pressure reduction voltage-stabiliser tube LDO and the filter capacitor C3, the C4 that are connected its output.External power supply V1 can be alternating current, it also can be direct current, direct current also can be battery, rectifier diode D1 carries out rectification to the alternating current of input, or the direct current of importing is carried out direct current polarity lead, output dc voltage VDD1, low pressure reduction voltage-stabiliser tube LDO is responsible for providing stable operating on low voltage voltage VDD2 to electromagnet 6 and control chip MCU circuit 5, filter capacitor C1-C4 realizes the filtering to power supply, promotes power quality.
As shown in Figure 2, boost energy storage and feedback control circuit 2 comprises wire-wound inductance L 1, npn switching transistor Q2, Q3, resistance R 1, R2, rectifying tube D2, high pressure energy storage capacitor C5 and voltage detecting pipe Z1, one end of wire-wound inductance L 1 connects the output VDD2 of power supply input processing circuit 1, the other end connects the collector electrode of npn switching transistor Q2, the control end CN2 that boosts connects the base stage of npn switching transistor Q2 through resistance R 1, the grounded emitter of this npn switching transistor Q2, the positive pole of rectifying tube D2 connects the collector electrode of npn switching transistor Q2, negative pole connects the end of high pressure energy storage capacitor C5, the other end ground connection of this high pressure energy storage capacitor C5, the tie point output voltage V DD3 of the negative pole of rectifying tube D2 and high pressure energy storage capacitor C5 is to electromagnet 6, this output voltage V DD3 is successively through resistance R 2, the base stage of voltage detecting pipe Z1 input npn switching transistor Q3, the collector electrode of this npn switching transistor Q3 connects feedback output end CN3, grounded emitter.Wherein wire-wound inductance L 1, npn switching transistor Q2, resistance R 1 have been formed an inductance type booster circuit of simply doing switch drive with transistor, when boosting control end input pulse boosted switch control signal, utilized the electromagnetic conversion of inductance and the characteristic of boosting to realize quick high-tension generation; Rectifying tube D2 is then charging toward capacitor C 5 behind the voltage commutation that raises, capacitor C 5 quick charges, output voltage V DD3 rises, in case rise to the breakdown value of voltage detecting pipe Z1, show that high voltage is full of in capacitor C 5, this moment, voltage detecting pipe Z1 punctured, transistor Q3 saturation conduction, feedback output end CN3 output low level feedback signal, the state that will be full of electricity feeds back to control chip MCU circuit 5 through feedback output end CN3, MCU circuit 5 output low level boosted switch immediately controls signal to the control end CN2 that boosts, transistor Q2 is ended, thereby, close transistor Q2, output voltage V DD3 keeps low-voltage, and the energy storage end-of-job boosts.
As shown in Figure 2, power transistor drive circuit 3 comprises npn power transistor Q1 and resistance R 3, and control end CN4 is through the base stage of resistance R 3 connection npn power transistor Q1, and the collector electrode of this transistor Q1 connects electromagnet 6, grounded emitter.Control chip MCU circuit 5 output pulse width modulator control signals or constant level control signal to control end CN4, the constant level control signal comprises constant low level control signal and constant high-level control signal, constant low level control signal control npn power transistor Q1 continues to end, electromagnet 6 discharges, constant high-level control signal control npn power transistor Q1 continues conducting, electromagnet 6 adhesives, pulse-width modulation control signal control npn power transistor Q1 copped wave work, electromagnet 6 is kept adhesive.Protection diode D3 is connected in parallel on the two ends of electromagnet 6, protective transistor Q1.
As shown in Figure 2, undervoltage detection circuit 4 comprises voltage detector VDO, its input connects the output VDD1 of diode halfwave rectifier filter circuit, VDD1 is as the voltage detecting point, directly monitor the power supply situation of external power supply V1, by undervoltage detection circuit 4, the input voltage state is fed back in the control chip MCU circuit 5 in real time, make MCU circuit 5 under wide low input scope, can start electromagnet 6 adhesives by boost energy storage and the suitable high voltage of feedback control circuit 2 outputs of the control end CN2 control of boosting; Can keep electromagnet 6 to be operated in ultralow keeping under the electric current by control end CN4 control power transistor drive circuit 3.
As shown in Figure 3, embodied the work relationship of electromagnet voltage V and time T.If the external power supply of embodiment is battery, its supply power voltage V1 can be well below the rated voltage V2 of electromagnet, and the storage driving voltage V3 after boosting is higher than the rated voltage V2 of electromagnet far away, the process of boosting the simultaneously T1 time is a dynamic instantaneous time, therefore, can realize that electromagnet stably drives work in wide-voltage range.
The T1 time period is the boost in voltage charging change procedure of capacitor C 5 in the accumulator of boosting, and the length of T1 is that the control with supply power voltage V1 and the transistor Q2 of MCU dynamically associates in real time.Detect the detection signal of voltage detector VDO output CN1 output by MCU, when powering in the normal voltage scope, MCU output normal burst boosted switch controls signal to the control end CN2 that boosts, control transistor Q2 is with normal switching frequency work, and the assurance booster circuit can be finished charging process in the short time at low current; When powering under under-voltage condition, MCU improves the output duty of ratio, and the switching frequency work of control transistor Q2 to adjust is exported duty of ratio by automatic adjustment, guarantees that booster circuit can be still with low current condition work in wide-voltage range.
Each operating time section T1-T4 of electromagnet is made of different voltage sections, mainly be by to the state-detection of booster voltage, the state-detection of power supply voltage, and utilized electromagnet characteristic (instant high-voltage starts and the characteristic of low-voltage maintenance), again by the control flexibly in real time of MCU program, therefore, can realize that electromagnet stably drives work under the high efficiency mode of wide-voltage range, extremely low power dissipation.
The dashed pulse of T3-T4 section has shown that power input voltage is in the normal voltage scope among Fig. 3, control chip MCU circuit 5 real-time output pulse width modulator control signals are given the control end CN4 of power transistor Q1, with this drive magnet, thereby control is input to the current of electromagnet energy, has realized the function of low-power consumption work under the normal power supply state; And the solid line of T3-T4 section has shown that power input voltage is under under-voltage condition, control chip MCU circuit 5 is directly exported high-level control signal, rather than pulse-width modulation control signal, because only in this way could guarantee the electromagnet driven, taken full advantage of the low-voltage area of resetting voltage Vs to under-voltage voltage V0, therefore, can realize that electromagnet stably drives work under wide-voltage range.
The utilizability of the present invention on industry is: according to the present invention, can make electromagnet with super low-power consumption work, and the work of energy low voltage power supply, under battery powered situation, with wide-voltage range work, improve the efficient of solenoid actuated substantially.
Claims (2)
1. super low-power consumption high efficiency control circuit for electromagnet, comprise electromagnet (6), power supply input processing circuit (1), energy storage and feedback control circuit (2) and control chip MCU circuit (5) boost, external power supply is successively through power supply input processing circuit (1), boost energy storage and feedback control circuit (2) transported to electromagnet (6), described control chip MCU circuit (5) output boosted switch controls signal to the control end that boosts of boost energy storage and feedback control circuit (2), imports the feedback signal of the feedback output end output of boost energy storage and feedback control circuit (2);
Boost energy storage and feedback control circuit to the input low-voltage boost fast and energy storage, and the result fed back to control chip MCU circuit, control chip MCU circuit is controlled beginning and the end of the energy storage work of boosting of boost energy storage and feedback control circuit automatically according to feedback result, make the electromagnetic actuation instant high-voltage produce big electric current, the low voltage sustain electric current is little after the adhesive;
It is characterized in that: described energy storage and the feedback control circuit (2) of boosting comprises wire-wound inductance L 1, npn switching transistor Q2, Q3, resistance R 1, R2, rectifying tube D2, high pressure energy storage capacitor C5 and voltage detecting pipe Z1, one end of described wire-wound inductance L 1 connects the output of power supply input processing circuit (1), the other end connects the collector electrode of npn switching transistor Q2, the described control end that boosts connects the base stage of npn switching transistor Q2 through resistance R 1, the grounded emitter of this npn switching transistor Q2, the positive pole of rectifying tube D2 connects the collector electrode of npn switching transistor Q2, negative pole connects the end of high pressure energy storage capacitor C5, the other end ground connection of this high pressure energy storage capacitor C5, the tie point output voltage V DD3 of the negative pole of described rectifying tube D2 and high pressure energy storage capacitor C5 is to electromagnet (6), this output voltage V DD3 is successively through resistance R 2, the base stage of voltage detecting pipe Z1 input npn switching transistor Q3, the collector electrode of this npn switching transistor Q3 connects feedback output end, grounded emitter;
When boosting control end input pulse boosted switch control signal, output voltage V DD3 rises, in case rise to the breakdown value of voltage detecting pipe Z1, feedback output end output low level feedback signal; When boosting control end input low level boosted switch control signal, output voltage V DD3 keeps low-voltage.
2. control circuit for electromagnet according to claim 1, it is characterized in that: also comprise the undervoltage detection circuit (4) of monitoring external power supply power supply situation, its input connects power supply input processing circuit (1), and its output output detection signal is to control chip MCU circuit (5).
3,Control circuit for electromagnet according to claim 1 and 2, it is characterized in that: also comprise the power transistor drive circuit (3) that connects electromagnet (6), pulse-width modulation control signal or the constant level control signal of its control end input control chip MCU circuit (5) output, this control chip MCU circuit (5) is by adhesive or the release of described power transistor drive circuit control electromagnet.
4,Control circuit for electromagnet according to claim 1 is characterized in that: described power supply input processing circuit (1) comprises current rectifying and wave filtering circuit and the voltage stabilizing circuit that is connected in series successively.
5,Control circuit for electromagnet according to claim 4, it is characterized in that: described current rectifying and wave filtering circuit comprises rectifier diode D1 and the filter capacitor C1, the C2 that are connected its output, and described voltage stabilizing circuit comprises low pressure reduction voltage-stabiliser tube LDO and the filter capacitor C3, the C4 that are connected its output.
6,Control circuit for electromagnet according to claim 2, it is characterized in that: described power supply input processing circuit (1) comprises current rectifying and wave filtering circuit and the voltage stabilizing circuit that is connected in series successively, and the input of described undervoltage detection circuit (4) connects the output of current rectifying and wave filtering circuit.
7,Control circuit for electromagnet according to claim 6, it is characterized in that: described current rectifying and wave filtering circuit comprises rectifier diode D1 and the filter capacitor C1, the C2 that are connected its output, described voltage stabilizing circuit comprises low pressure reduction voltage-stabiliser tube LDO and the filter capacitor C3, the C4 that are connected its output, and described undervoltage detection circuit (4) comprises voltage detector VDO.
8, control circuit for electromagnet according to claim 2, it is characterized in that: described undervoltage detection circuit (4) comprises voltage detector VDO.
9, control circuit for electromagnet according to claim 3, it is characterized in that: described power transistor drive circuit (3) comprises npn power transistor Q1 and resistance R 3, described control end connects the base stage of npn power transistor Q1 through resistance R 3, the collector electrode of this transistor Q1 connects electromagnet (6), grounded emitter;
When control end is imported constant high-level control signal, electromagnet (6) adhesive, when the input pulse-width modulation control signal, electromagnet (6) is kept adhesive, and when the constant low level control signal of input, electromagnet (6) discharges.
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| CN 201110090277 CN102184807B (en) | 2011-04-11 | 2011-04-11 | Ultralow-power-consumption and high-efficiency electromagnet control circuit |
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| CN 201110090277 CN102184807B (en) | 2011-04-11 | 2011-04-11 | Ultralow-power-consumption and high-efficiency electromagnet control circuit |
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| CN102184807B true CN102184807B (en) | 2013-07-17 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106941751A (en) * | 2017-04-27 | 2017-07-11 | 宁波迪明斯电子科技有限公司 | A kind of drive circuit of variable voltage |
| CN108923649A (en) * | 2018-06-07 | 2018-11-30 | 珠海智融科技有限公司 | A kind of fast charge power supply step-up/step-down circuit and fast charge power supply |
| CN112399651A (en) * | 2020-10-30 | 2021-02-23 | 广东格兰仕集团有限公司 | Electromagnet drive control circuit of heating electric appliance and heating electric appliance |
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2011
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|---|---|---|---|---|
| US5914849A (en) * | 1994-04-26 | 1999-06-22 | Kilovac Corporation | DC actuator control circuit with voltage compensation, current control and fast dropout period |
| CN1770349A (en) * | 2005-09-22 | 2006-05-10 | 西安交通大学 | Intelligently controlled AC contact with voltage feedback |
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Effective date of registration: 20130201 Address after: 510520 Guangdong city of Guangzhou province Tianhe District Ke Mu Lang Road No. 5 room 101-201 Applicant after: GUANGZHOU GUUB TECHNOLOGY CO., LTD. Address before: Two, 510507 floor, building G, Tianhe North Court, Tianhe South Road, Guangzhou, Guangdong Applicant before: Li Jingong |
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Denomination of invention: Ultralow-power-consumption and high-efficiency electromagnet control circuit Effective date of registration: 20200622 Granted publication date: 20130717 Pledgee: Agricultural Bank of China Limited Dongcheng Branch of Guangzhou Pledgor: GUANGZHOU GUUB TECHNOLOGY Co.,Ltd. Registration number: Y2020440000150 |
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Date of cancellation: 20210623 Granted publication date: 20130717 Pledgee: Agricultural Bank of China Limited Dongcheng Branch of Guangzhou Pledgor: GUANGZHOU GUUB TECHNOLOGY Co.,Ltd. Registration number: Y2020440000150 |