CN104737263A - Current control circuit for the control bobbin of a contactor - Google Patents
Current control circuit for the control bobbin of a contactor Download PDFInfo
- Publication number
- CN104737263A CN104737263A CN201380054494.5A CN201380054494A CN104737263A CN 104737263 A CN104737263 A CN 104737263A CN 201380054494 A CN201380054494 A CN 201380054494A CN 104737263 A CN104737263 A CN 104737263A
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- Prior art keywords
- control circuit
- current control
- output
- joint
- amplifier
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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
- 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
- H01H47/325—Energising current supplied by semiconductor device by switching regulator
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
The invention relates to a current control circuit (40) for the control bobbin of a contactor, which comprises two connections (21, 22) for connecting to an energy accumulator. Said current control circuit comprises a integrated circuit switching regulator (25) which is provided with two supply voltage inlets (26, 27) which are respectively connected to one of the two connections (21, 22). Said IC switching regulator (25) also comprises a switch connection (31), a feedback connection (32) and a compensation connection (33). Said current control circuit (40) also comprises a first and second outlet (18,19) via which the current control circuit (40) can be connected to the connections of the control bobbin of a contactor. According to the invention, the first outlet (18) is connected to the switch connection (31) of the IC switching regulator (25) and the second outlet (19) is connected to a current measuring unit and to an amplifier unit (34), the outlet of which is connected to the feedback connection (32) of the IC switching regulator (25).
Description
Technical field
The present invention relates to a kind of current control circuit of the trigger winding for contactor, wherein this current control circuit comprises on-off controller integrated circuit and the current measurement be attached thereto and amplifier unit.
Background technology
There are indications, in the future not only in stationary applications and also will be increasingly extensive in the vehicle of such as motor vehicle driven by mixed power and motor vehicle use battery system, very high requirement is proposed in reliability to this battery system.Its background is, the fault of battery may cause the problem that safety is relevant.In order to the power providing expectation to corresponding application scenario, usually a large amount of battery battery core is connected in series, obtain high cell output voltage thus, in the corresponding supply line that this output voltage is carried in battery-powered device constantly when not having suitable measure and may mean to attendant or user dangerous.Based on this reason, contactor is set usually, so that the electrical connection of battery can be disconnected.In the motor vehicle with drive motor, general not only at the positive pole of battery but also install contactor at the negative pole of battery, even if this contactor is designed for the high pressure of battery and also reliably must disconnects the connection of battery when the short circuit current more than 1000A.
Generally realize switching on and off of contactor by electronics output stage or by the current control circuit of powering for the trigger winding of contactor.At this, trigger power be can not ignore and disregarded.But in order to reliably attract contactor than needing much higher trigger current to and then keep in touch in closed state in connection process.The situation common based on this reason is, the triggering of contactor is divided into two kinds of patterns, namely attracts pattern and Holdover mode (or also can be divided into attraction stage and maintenance stage).The height of trigger current represents corresponding pattern, and it is high during attraction pattern than during Holdover mode.At this, be called as attraction level and maintenance level.At this, attract pattern only for connect (closing) contactor and the duration relatively short.Under in the major part operating time, contactor operates in the Holdover mode saving power.Therefore, the current control circuit for triggering contactors should be able to realize two kinds of operational modes.
According in the current control circuit of prior art, use dc-dc converter to realize such operational mode or to realize the curent change curve corresponding with these operational modes.Figure 1 illustrates the current control circuit 40 with dc-dc converter of the prior art.The current control circuit 40 of Fig. 1 has the bipolar transistor being used as main switch element 1 in shown current control circuit 40.The emitter of bipolar transistor is connected with the negative electrode of unloaded diode 2, and the collector electrode of the anode of unloaded diode 2 and bipolar transistor is connected with a pole of voltage source 5 respectively.The base stage of bipolar transistor is activated by the same gate driver circuit 3 by voltage fed.When charge pumps principle or bootstrapping principle, the base stage that gate driver circuit 3 is bipolar transistor provides necessary control voltage and the control electric current of necessity.Electrical connection section between the emitter and the negative electrode of unloaded diode 2 of bipolar transistor is connected with a joint of the equivalent electric circuit 4 of contactor or is connected with the trigger winding of contactor.Another joint of the equivalent electric circuit 4 of contactor is connected with a pole of voltage source 5 by shunt resistance 35.Measured by this shunt resistance 35 and flow through the trigger winding of contactor or the electric current of equivalent electric circuit 4.The joint of shunt resistance 35 is connected with the input (in this case amplifier) of the circuit for the treatment of measuring-signal 7.At this, the circuit being embodied as operational amplifier for the treatment of measuring-signal 7 is connected with the boost voltage generative circuit 9 of being powered by voltage source 5, and for the treatment of the circuit of measuring-signal 7 another energization input and voltage source 5 be not connected with boost voltage generative circuit 9 extremely directly connect.Boost voltage generative circuit 9 is for providing supply voltage for the treatment of the circuit of measuring-signal 7.Output for the treatment of the circuit of measuring-signal 7 is connected with the input of control amplifier 10, and this control amplifier is to the actual value of processed measuring-signal and nominal value compares or generates control deviation by the nominal value of the measuring-signal be processed and actual value also reasonably amplifies this control deviation.Control amplifier 10 sends the control deviation of amplification to loop filter 11 by its output, the controller transfer function of this loop filter determination current control circuit 40.The output of loop filter 11 is connected with the input of PWM unit 14, and this PWM unit is connected to again on pierce circuit 13 itself.Frequency for the trigger impulse of main switch element 1 and duration is determined by the combination of PWM unit 14 and pierce circuit 13.The output of PWM unit 14 is connected with the match circuit 12 being embodied as level displacement shifter, and this match circuit is connected with gate driver circuit 3 again in its side.Match circuit 12 makes mostly the go back trigger impulse of the local ground potential of reference circuit and the voltage levvl of gate driver circuit 3 or voltage potential of PWM unit 14 match.Thus, unit and parts form the control system with closed control loop referred in this, controlled by this control system or controllable flow through the electric current of the trigger winding of contactor.
In the prior art, the current control circuit shown in Fig. 1 mostly also by other refill component and supplementary units, such as the unit of overvoltage protection or be expanded by the protective circuit of the power semiconductor for being correlated with.Based on parts to be achieved in each current control circuit a large amount of property and be necessary for the quantity of current control circuit that each mounted contactor installs, the parts consumption needed for this contactor triggering mode may be huge.On the other hand because still very few delivery number of packages does not also exist the integrated circuit (Integrated Circuits, ICs) for this application at present.
Summary of the invention
According to the current control circuit that the invention provides a kind of trigger winding for contactor, this current control circuit comprises two joints for being connected with storage battery.In addition, current control circuit comprises on-off controller integrated circuit, and this on-off controller integrated circuit has two power voltage input terminal be connected with a joint in described two joints respectively.In addition, on-off controller integrated circuit comprises crossover sub, feedback joint and compensating joint.In addition, current control circuit comprises the first output and the second output, and current control circuit is connected by the joint of these outputs with the trigger winding of contactor.According to the present invention, first output is connected with the crossover sub of on-off controller integrated circuit and the second output is connected with current measurement and amplifier unit, and this current measurement is connected with the feedback joint of on-off controller integrated circuit with the output of amplifier unit.
By this execution mode of the current control circuit of the trigger winding for contactor, the quantity of the discrete parts realized needed for current control circuit can be reduced on a large scale.Therefore, the on-off controller integrated circuit making the script that commercially can be easy to obtain be designed for other application scenarios at this can be used for contactor Current Control by the external circuit layout be changed relative to original design and expand.Can reduce thereupon and realize current control circuit cost used and the easily extensible structure space available in the inside that contactor connects up.
On-off controller integrated circuit is preferably embodied as step-down controller integrated circuit.As the starting point of the current control circuit for realizing the trigger winding for contactor, the step-down controller realized particularly advantageously is suitable as integrated circuit.
Current measurement and amplifier unit preferably include shunt resistance, and the first joint of this shunt resistance is connected with the second output and its second joint is connected with constant potential.Shunt resistance or shunt price compared with other current measuring units or current sensor is very cheap and however very accurately can measure electric current.
In the preferred improvement project of present embodiment, current measurement and amplifier unit comprise the current measurement amplifier with two inputs and an output, wherein the input of current measurement amplifier is connected with the joint of shunt resistance respectively, and wherein the output of current measurement amplifier is connected with the output of current measurement and amplifier unit.Stable control loop can be realized in current control circuit inside by using current measurement amplifier.
Current measurement amplifier is preferably embodied as operational amplifier, its non-inverting input forms the first input end of current measurement amplifier and the second input of its inverting input formation current measurement amplifier, and wherein the output of operational amplifier forms the output of current measurement amplifier.Operational amplifier is Short Circuit withstand, does not need frequency compensation, has very high input voltage range and absorbs little power.
In a preferred embodiment, current control circuit comprises compensating network, and this compensating network is connected with the compensating joint of on-off controller integrated circuit by the first joint.
Compensating network preferably includes loop filter, and this loop filter provides controller transfer function for current control circuit.At this, loop filter for making the control signal filtering produced by current measurement amplifier, to eliminate or to suppress the interference to control signal.
Compensating network is connected with constant potential preferably by the second joint.This constant potential is preferably ground.
There is furthermore provided the battery had according to current control circuit of the present invention, wherein battery is particularly preferably embodied as lithium ion battery.The advantage of this battery is especially its relatively high energy density and its high thermal stability.Another advantage of lithium ion battery is that it does not have memory effect.
There is furthermore provided a kind of motor vehicle comprising the battery had according to current control circuit of the present invention, wherein battery is connected with the drive system of motor vehicle.
Give favourable improvement project of the present invention in the dependent claims and be explained in the description.
Accompanying drawing explanation
Embodiments of the invention are illustrated by accompanying drawing and following explanation.Wherein:
Fig. 1 shows the current control circuit with dc-dc converter of the prior art,
Fig. 2 shows the embodiment of the current control circuit according to the trigger winding for contactor of the present invention, and
Fig. 3 shows the specific embodiments of the current control circuit according to the trigger winding for contactor of the present invention.
Embodiment
Figure 2 illustrates the embodiment of the current control circuit 40 according to the trigger winding for contactor of the present invention.Current control circuit 40 comprises two joints 21,22, and it is connected with storage battery by these joints.In addition, current control circuit 40 has on-off controller integrated circuit 25, is namely embodied as the on-off controller of integrated circuit.In other words, on-off controller integrated circuit 25 is that its parts or component are embodied as the form of single-chip switching circuit and it can be used as open or by the on-off controller of the purchased acquisition of the integration component of housings close.In the present embodiment, on-off controller integrated circuit 25 is only exemplarily embodied as step-down controller integrated circuit.But current control circuit 40 according to the present invention also can be embodied as, on-off controller integrated circuit 25 is not the on-off controller integrated circuit 25 being embodied as step-down controller integrated circuit but being embodied as other wherein.On-off controller integrated circuit 25 has two power voltage input terminal 26,27, and it is connected with a joint in two joints 21,22 of current control circuit 40 respectively.In the present embodiment, first power voltage input terminal 26 of on-off controller integrated circuit 25 is connected with the first joint 21 of current control circuit 40, and the second source voltage input end 27 of on-off controller integrated circuit 25 is connected with the second joint 22 of current control circuit 40.In the present embodiment, the first power voltage input terminal 26 is configured for the VBAT input be connected with storage battery, and second source voltage input end 27 is the GND inputs for being connected with earthing potential or for connecting with the pole be connected with ground of storage battery.At this, this execution mode of the power voltage input terminal 26,27 of on-off controller integrated circuit 25 purely exemplarily selects in the present embodiment.Also the on-off controller integrated circuit 25 with other power voltage input terminal 26,27 can be realized in current control circuit 40 according to the present invention.In addition, dc-dc converter integrated circuit 25 has crossover sub 31, feedback joint 32 and compensating joint 33 or respectively alternatively with the joint of function meeting crossover sub 31, feedback joint 32 or compensating joint 33 that other titles represent.
In addition, current control circuit 40 has the first output 18 and the second output 19, and current control circuit 40 is connected by the joint of these outputs with the trigger winding of contactor.In other words, the first output 18 of current control circuit 40 can be connected with the first joint of the trigger winding of contactor, and the second output 19 of current control circuit 40 can be connected with the second joint of the trigger winding of contactor.First output 18 of current control circuit 40 is connected with the crossover sub 31 of on-off controller integrated circuit 25.Second output 19 is connected with current measurement and amplifier unit 34, and this current measurement is connected with the feedback joint 32 of on-off controller integrated circuit 25 with the output of amplifier unit.
If current control circuit 40 is connected with trigger winding, the trigger winding of contactor itself plays the effect of the smoothing inductor of current control circuit 40, thus by the electric current of current control circuit 40 control flow check through trigger winding.
At this, on-off controller integrated circuit 25 can be exemplarily purely the LM22677 type of National Semiconductor on-off controller integrated circuit 25 or pure be exemplarily the on-off controller integrated circuit 25 of the LM26003 type of National Semiconductor, or also can be other on-off controller integrated circuit 25 arbitrarily of the prior art.
Fig. 3 shows the specific embodiments of the current control circuit 40 according to the trigger winding for contactor of the present invention.The same according to this current control circuit 40 of the present invention substantially with shown in Fig. 2, its difference is to be specifically described current measurement and amplifier unit 34 and current control circuit 40 has compensating network 15.Therefore, the parts represented with same reference numerals are in figure 3 corresponding with those parts in first embodiment of Fig. 2, thus the above-mentioned content about these parts is also applicable to second embodiment of Fig. 3.Therefore, the most of parts in the parts represented with same reference numerals are not mentioned in the explanation of Fig. 3.
In the present embodiment, current measurement and amplifier unit 34 exemplarily have shunt resistance 35 purely, and the first joint of this shunt resistance is connected with the second output 19 of current control circuit 40 and the second joint of this shunt resistance is connected with constant potential.In the present embodiment, constant potential is exemplarily the local ground of current control circuit 40 purely.In addition, current measurement in the present embodiment and amplifier unit 34 exemplarily comprise current measurement amplifier 36 purely.This current measurement amplifier 36 has two inputs 37 and 38 and an output 39, and wherein the input 37,38 of current measurement amplifier 36 is connected with a joint of shunt resistance 35 respectively.The output 39 of current measurement amplifier 36 is connected with the output of current measurement and amplifier unit 34.In other words, the output 39 of current measurement amplifier 36 is electrically connected with the feedback joint 32 of on-off controller integrated circuit 25.In the present embodiment, current measurement amplifier 36 is exemplarily embodied as operational amplifier purely.The non-inverting input of operational amplifier forms the first input end 38 of current measurement amplifier 36, and the inverting input of operational amplifier forms the second input 37 of current measurement amplifier 36.In addition, the output of operational amplifier forms the output 39 of current measurement amplifier 36.Thus that is, the output of operational amplifier is identical with the output 39 of current measurement amplifier 36 in the present embodiment.In the present embodiment, the non-inverting input of operational amplifier is connected conductively with the electrical connection section between shunt resistance 35 and the output 19 of current control circuit 40.The inverting input of operational amplifier is connected with the electrical connection section between the local ground and shunt resistance 35 of current control circuit 40.
If current control circuit 40 is connected with the trigger winding of contactor, then the electric current flowing through trigger winding flows through shunt resistance 35 equally.This electric current produces the voltage drop on shunt resistance 35 proportional with it, and this voltage drop is obtained by current measurement amplifier 36 and amplifies and be sent in feedback joint 32 by the output 39 of current measurement amplifier 36.On-off controller integrated circuit 25 by crossover sub 31 by current delivery to the first output 18 and thus when being connected with current control circuit 40 by current delivery in the first joint of the trigger winding of contactor, can control in the above described manner at the electric current of this transmission.If the electric current flowing through trigger winding is such as excessive or too small, the voltage drop on shunt resistance 35 is also excessive relative to the nominal value determined before or too small.This is reflected in and is sent in the output signal of on-off controller integrated circuit 25 by the output 39 of current measurement amplifier 36 and feedback joint 32.This output signal can be assessed in the inside of on-off controller integrated circuit 25 and produce for the control signal of control flow check through the electric current of trigger winding.So adjustable throttle is through the electric current of trigger winding.
As mentioned above, current control circuit 40 has compensating network 15 in the present embodiment, and this compensating network is connected with the compensating joint 33 of on-off controller integrated circuit 25 by the first joint.Compensating network 15 is exemplarily connected with the local ground of current control circuit 40 purely by the second joint.In the present embodiment, compensating network 15 comprises loop filter, and this loop filter provides for current control circuit 40 or determines controller transfer function.
The compensating network 15 be connected with compensating joint 33 is optional for realizing current control circuit 40 according to the present invention.Also can realize there is no compensating network 15 or have be embodied as multi-form compensating network 15 according to current control circuit 40 of the present invention.These other, the compensating network 15 that is not namely embodied as loop filter also can be connected with other constant potentials on the local ground being different from current control circuit 40 or also can be connected with non-constant current potential.
In addition, can be embodied as equally according to the current measurement of current control circuit 40 of the present invention and amplifier unit 34 and be different from mode shown here.It such as can have other circuit being different from current measurement amplifier 36.Other modes also by being different from operational amplifier in the execution mode with current measurement amplifier 36 realize current measurement amplifier.In addition, shunt resistance 35 is used also to be optional for current control circuit 40 according to the present invention.In current control circuit 40 according to the present invention, such as also can implement other transducer or unit, these transducers or unit structure are for measuring the electric current of the trigger winding be connected with current control circuit 40 flowing through contactor.
Claims (10)
1. the current control circuit for the trigger winding of contactor (40), this current control circuit comprises:
-two joints (21,22) for being connected with storage battery,
-on-off controller integrated circuit (25), it has two power voltage input terminal (26,27) be connected with a joint in two described joints (21,22) respectively, wherein said on-off controller integrated circuit (25) also comprises crossover sub (31), feedback joint (32) and compensating joint (33)
-the first output (18) and the second output (19), described current control circuit (40) can be connected with the joint of the trigger winding of contactor by above-mentioned output,
It is characterized in that,
Described first output (18) is connected with the crossover sub (31) of described on-off controller integrated circuit (25) and described second output (19) is connected with current measurement and amplifier unit (34), and this current measurement is connected with the feedback joint (32) of described on-off controller integrated circuit (25) with the output of amplifier unit.
2. current control circuit according to claim 1 (40), wherein said on-off controller integrated circuit (25) is step-down controller integrated circuit.
3. according to current control circuit in any one of the preceding claims wherein (40), wherein said current measurement and amplifier unit (34) comprise shunt resistance (35), and the first joint of this shunt resistance is connected with described second output (19) and the second joint of this shunt resistance is connected with constant potential.
4. current control circuit according to claim 3 (40), wherein said current measurement and amplifier unit (34) comprise the current measurement amplifier (36) with two inputs (37,38) and an output (39), the input (37,38) of wherein said current measurement amplifier (36) is connected with a joint of described shunt resistance (35) respectively, and the output (39) of wherein said current measurement amplifier (36) is connected with the output of described current measurement and amplifier unit (34).
5. current control circuit according to claim 4 (40), wherein said current measurement amplifier (36) is operational amplifier, the non-inverting input of this operational amplifier forms the first input end (38) of described current measurement amplifier (36) and the inverting input of this operational amplifier forms second input (37) of described current measurement amplifier (36), and the output of wherein said operational amplifier forms the output (39) of described current measurement amplifier (36).
6. according to current control circuit in any one of the preceding claims wherein (40), wherein said current control circuit (40) comprises compensating network (15), and this compensating network is connected with the compensating joint (33) of described on-off controller integrated circuit (25) by the first joint.
7. current control circuit according to claim 6 (40), wherein said compensating network (15) comprises loop filter, and this loop filter is that described current control circuit (40) provides controller transfer function.
8. the current control circuit (40) according to claim 6 or 7, wherein said compensating network (15) is connected with constant potential by the second joint.
9. one kind has the battery of current control circuit according to any one of claim 1 to 8 (40).
10. have a motor vehicle for battery according to claim 9, wherein said battery is connected with the drive system of described motor vehicle.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201210218996 DE102012218996A1 (en) | 2012-10-18 | 2012-10-18 | Current control circuit for the drive coil of a contactor |
| DE102012218996.3 | 2012-10-18 | ||
| PCT/EP2013/068248 WO2014060144A1 (en) | 2012-10-18 | 2013-09-04 | Current control circuit for the control bobbin of a contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104737263A true CN104737263A (en) | 2015-06-24 |
Family
ID=49111207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380054494.5A Pending CN104737263A (en) | 2012-10-18 | 2013-09-04 | Current control circuit for the control bobbin of a contactor |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN104737263A (en) |
| DE (1) | DE102012218996A1 (en) |
| WO (1) | WO2014060144A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11542922B2 (en) | 2017-06-30 | 2023-01-03 | Vestas Wind Systems A/S | Electro-Thermal Heating system for wind turbine blades |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4511829A (en) * | 1980-07-17 | 1985-04-16 | Exploration Logging, Inc. | Direct current control in inductive loads |
| US5382918A (en) * | 1993-02-04 | 1995-01-17 | National Semiconductor Corporation | Capacitance multiplier for the internal frequency compensation of switching regulator integrated circuits |
| CN1369101A (en) * | 1999-07-10 | 2002-09-11 | 米里坡公司 | Method and system for driving solenoid |
| CN1630175A (en) * | 2003-12-19 | 2005-06-22 | 夏普株式会社 | Switching power supply apparatus and electric appliance therewith |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7405918B2 (en) * | 2004-12-10 | 2008-07-29 | Yazaki North America, Inc. | Inductive load control |
-
2012
- 2012-10-18 DE DE201210218996 patent/DE102012218996A1/en not_active Ceased
-
2013
- 2013-09-04 CN CN201380054494.5A patent/CN104737263A/en active Pending
- 2013-09-04 WO PCT/EP2013/068248 patent/WO2014060144A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4511829A (en) * | 1980-07-17 | 1985-04-16 | Exploration Logging, Inc. | Direct current control in inductive loads |
| US5382918A (en) * | 1993-02-04 | 1995-01-17 | National Semiconductor Corporation | Capacitance multiplier for the internal frequency compensation of switching regulator integrated circuits |
| CN1369101A (en) * | 1999-07-10 | 2002-09-11 | 米里坡公司 | Method and system for driving solenoid |
| CN1630175A (en) * | 2003-12-19 | 2005-06-22 | 夏普株式会社 | Switching power supply apparatus and electric appliance therewith |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11542922B2 (en) | 2017-06-30 | 2023-01-03 | Vestas Wind Systems A/S | Electro-Thermal Heating system for wind turbine blades |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012218996A1 (en) | 2014-04-24 |
| WO2014060144A1 (en) | 2014-04-24 |
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Application publication date: 20150624 |