KR20150024595A - Relay economizer and method of controlling the same - Google Patents

Relay economizer and method of controlling the same Download PDF

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Publication number
KR20150024595A
KR20150024595A KR20130101670A KR20130101670A KR20150024595A KR 20150024595 A KR20150024595 A KR 20150024595A KR 20130101670 A KR20130101670 A KR 20130101670A KR 20130101670 A KR20130101670 A KR 20130101670A KR 20150024595 A KR20150024595 A KR 20150024595A
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South Korea
Prior art keywords
relay
resistor
switch
voltage
magnitude
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KR20130101670A
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Korean (ko)
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KR102046124B1 (en
Inventor
황규민
김상연
음영환
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에스케이컨티넨탈이모션코리아 주식회사
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Priority to KR1020130101670A priority Critical patent/KR102046124B1/en
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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
    • H01H47/02—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

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Abstract

A relay economizer according to the present invention comprises: a first switch for applying a relay driving voltage to a coil of a relay; At least one voltage sensing unit for sensing a magnitude of the relay driving voltage; A variable resistor part constituting a closed circuit together with the coils of the first switch and the relay and having a resistance variable according to the magnitude of the relay driving voltage sensed by the at least one voltage sensing part; And a second switch connected in parallel to the variable resistance unit. By simplifying the circuit using a plurality of switches and resistors, the dependence on the control unit can be reduced, and it can be applied to an external circuit of a relay, It is possible to adaptively reduce the current consumption of the relay according to the size of the relay driving voltage by keeping the relays in a plurality of holding states after the pickup operation of the relay by adaptively subdividing the holding state of the relays have.

Description

Relay economizer and method of controlling same

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relay economizer, and more particularly, to a relay economizer capable of reducing current consumption according to the operation of a relay and a control method thereof.

Relays are used in various fields as an important component in the current industry. In particular, a battery system applied to an electric vehicle requires a high output and a large-capacity relay is required for a power relay assembly (PRA) that interrupts the power of the battery system.

As the relays become larger in capacity, more current must be passed through the coils of the relays to operate the relays. On the other hand, the operation state of the relay can be largely divided into a turn-on operation state and a turn-off operation state. In the turn-on operation state, it is divided into a pick-up operation state and a holding operation state. An operation in which the relay is first attached is referred to as a pickup operation state, and a turn-on state is maintained from a certain time after the pickup operation State is referred to as a holding operating state.

Here, the current for the pickup is the largest, and in the holding state after the pickup, the current consumes less current than the initial pickup operation state. Actual 250A class relay flows 2.5A when picking up and 500mA or less when holding. Therefore, it is necessary to control the current according to the operation state of the relay, so that current consumption flowing through the relay can be reduced, thereby saving power of the battery system.

Further, the output voltage of a relay driving power source for driving a relay in an electric vehicle generally has a wide variation range. That is, when the rated output voltage of the relay driving power source is 12 volts (V), the relay driving voltage generally fluctuates between 9V and 16V. Accordingly, even if the driving voltage of the relay fluctuates, it is necessary to adaptively reduce the current consumption of the relay by dividing the holding state of the relay adaptively and keeping the relay in a plurality of holding states after the pickup operation of the relay.

Patent Document 1 described in the following prior art document relates to a relay driving apparatus and relates to a relay driving apparatus for controlling the size of a driving power source applied to an exciting coil of a relay apparatus. In the invention of Patent Document 1, the voltage / current control unit 427 controls the voltage and current supplied to the relay based on the state of the relay 410. The voltage / current control unit 427 provides the output voltage and the output current before the contact change of the relay switch, the output voltage and the output current after the contact change, respectively. That is, it provides a relatively high output voltage and output current prior to the contact change of the relay switch and a relatively low output voltage and output current after the contact change of the relay switch, have.

However, the invention of Patent Document 1 does not disclose the specific configuration of the voltage / current control section 427 for controlling the voltage and current supplied to the relay. The invention of Patent Document 1 is based on the assumption that the driving power supply unit 425 provides a constant output voltage, so that it can not adaptively cope with fluctuations in the output voltage of the driving power supply unit.

Therefore, it is possible to reduce dependence on the control unit by simplifying the circuit using a plurality of switches and resistors, and even if the driving voltage of the relay fluctuates, the holding state of the relay is adaptively divided accordingly, A relay economizer capable of adaptively reducing the current consumption of the relay according to the magnitude of the relay driving voltage and a control method thereof are required.

International Publication No. WO 2013-089511.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the conventional art described above, and it is an object of the present invention to provide a relay control apparatus and a relay control method, which can reduce dependence on a control unit, The relay economizer is capable of adaptively reducing the current consumption of the relay according to the magnitude of the relay driving voltage by keeping the relay in a plurality of holding states after the pickup operation of the relay.

Another problem to be solved by the present invention is to reduce the dependence on the control unit and to adaptively change the holding state of the relay according to the variation of the driving voltage of the relay, And the current consumption of the relay is adaptively reduced according to the magnitude of the relay driving voltage.

According to an aspect of the present invention, there is provided a relay economizer comprising:

A first switch for applying a relay driving voltage to the coil of the relay;

At least one voltage sensing unit for sensing a magnitude of the relay driving voltage;

A variable resistor part constituting a closed circuit together with the coils of the first switch and the relay and having a resistance variable according to the magnitude of the relay driving voltage sensed by the at least one voltage sensing part; And

And a second switch connected in parallel to the variable resistor section.

The relay economizer according to an embodiment of the present invention may further include a controller for controlling operations of the first switch and the second switch.

Further, in the relay economizer according to the embodiment of the present invention,

A fixed resistor having a predetermined resistance value; And

And one or more resistor parallel connection parts connected in parallel to the fixed resistor and connected or not connected in parallel to the fixed resistor according to the magnitude of the relay driving voltage sensed by the at least one voltage sensing part.

Further, in the relay economizer according to the embodiment of the present invention,

A voltage distributor for distributing the relay driving voltage; And

And a first switching unit that is short-circuited or opened according to the magnitude of the voltage distributed by the voltage distribution unit.

Further, in the relay economizer according to the embodiment of the present invention,

A first resistor to which the relay driving voltage is applied at one end; And

And a second resistor having one end connected to the other end of the first resistor and the other end connected to the ground.

Further, in the relay economizer according to the embodiment of the present invention, the first switching unit may include:

A third resistor to which the relay driving voltage is applied at one end; And

And a third switch connected between the other end of the third resistor and the ground and shorted or opened according to the magnitude of the voltage distributed by the first resistor and the second resistor.

In addition, in the relay economizer according to the embodiment of the present invention,

A fourth resistor whose one end is connected to one end of the fixed resistor; And

And a fourth switch connected at one end to the other end of the fourth resistor and at the other end to the other end of the fixed resistor and shorted or opened according to an operation state of the third switch.

Further, in the relay economizer according to the embodiment of the present invention, the third switch may include a shunt regulator or a switching transistor.

In addition, in the relay economizer according to the embodiment of the present invention, the fourth switch may include a field effect transistor or an insulated gate bipolar transistor (IGBT).

In addition, in the relay economizer according to the embodiment of the present invention, the controller may short-circuit the second switch and short-circuit the first switch to bring the relay into a pickup state.

Further, in the relay economizer according to the embodiment of the present invention, after the relay is brought into the pickup state, the controller may open the second switch to hold the relay in the holding state.

In addition, in the relay economizer according to the embodiment of the present invention, the resistance parallel connection portions are connected or not connected in parallel to the fixed resistors according to the magnitude of the relay driving voltage, And the magnitude of the current flowing through the coils of the relay in each of the plurality of holding states is smaller than the magnitude of the current for turning the relay from the turn off state to the pickup state and the minimum current for maintaining the relay in the holding state It may be more than the size.

In addition, in the relay economizer according to the embodiment of the present invention, when the relay drive voltage increases in size, the resistance value of the variable resistance portion decreases, and when the relay drive voltage decreases, the resistance value of the variable resistance portion increases have.

According to another aspect of the present invention, there is provided a method of controlling a relay economizer,

A first switch for applying a relay driving voltage to the coil of the relay; At least one voltage sensing unit for sensing a magnitude of the relay driving voltage; A variable resistor part constituting a closed circuit together with the coils of the first switch and the relay and having a resistance variable according to the magnitude of the relay driving voltage sensed by the at least one voltage sensing part; A second switch connected in parallel to the variable resistor section; And a control unit for controlling operations of the first switch and the second switch, the control method comprising:

(A) shorting the second switch by the control unit;

(B) the controller short-circuits the first switch to supply the relay driving voltage to the coil of the relay to bring the relay into a pickup state; And

(C) the control unit opens the second switch to hold the relay in a holding state,

The resistance value of the variable resistance unit is varied according to the magnitude of the relay driving voltage so that the relay is held in a plurality of holding states and the magnitude of the current flowing through the coils of the relay in each of the plurality of holding states, It may be at least the minimum current magnitude to hold it in the holding state.

In the control method of the relay economizer according to the embodiment of the present invention,

A fixed resistor having a predetermined resistance value; And

And one or more resistor parallel connection parts connected in parallel to the fixed resistor and connected or not connected in parallel to the fixed resistor according to the magnitude of the relay driving voltage sensed by the at least one voltage sensing part.

In the control method for a relay economizer according to an embodiment of the present invention,

A voltage distributor for distributing the relay driving voltage; And

And a first switching unit that is short-circuited or opened according to the magnitude of the voltage distributed by the voltage distribution unit.

In the control method of the relay economizer according to the embodiment of the present invention,

A first resistor to which the relay driving voltage is applied at one end; And

And a second resistor having one end connected to the other end of the first resistor and the other end connected to the ground.

In the control method of the relay economizer according to the embodiment of the present invention,

A third resistor to which the relay driving voltage is applied at one end; And

And a third switch connected between the other end of the third resistor and the ground and shorted or opened according to the magnitude of the voltage distributed by the first resistor and the second resistor.

In the control method of the relay economizer according to the embodiment of the present invention,

A fourth resistor whose one end is connected to one end of the fixed resistor; And

And a fourth switch connected at one end to the other end of the fourth resistor and at the other end to the other end of the fixed resistor and shorted or opened according to an operation state of the third switch.

Further, in the method of controlling a relay economizer according to an embodiment of the present invention, the third switch may include a shunt regulator or a switching transistor.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to this, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may appropriately define the concept of a term in order to best describe its invention The present invention should be construed in accordance with the spirit and scope of the present invention.

According to the present invention, since the circuit is simplified by using a plurality of switches and resistors, the reliance on the control unit can be lowered, and it can be applied to the external circuit of the relay, so that the versatility is high. The holding state of the relay is subdivided to hold the relay in a plurality of holding states after the pickup operation of the relay, so that the current consumption of the relay can be adaptively reduced according to the magnitude of the relay driving voltage.

1 is a circuit diagram of a relay economizer according to a first embodiment of the present invention;
2 is a diagram for explaining a pickup preparation operation of a relay.
3 is a diagram for explaining a pick-up operation of a relay.
4 is a diagram for explaining a first holding operation of the relay.
5 is a view for explaining a second holding operation of the relay.
6 is a graph showing a current flowing through a coil of a relay for explaining the operation of the relay economizer according to the first embodiment of the present invention.
7 is a circuit diagram of a relay economizer according to a second embodiment of the present invention;
8 is a flowchart showing a control method of a relay economizer according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings.

Also, terms such as " first, "" second," and the like are used to distinguish one element from another element, and the element is not limited thereto.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of related arts which may unnecessarily obscure the gist of the present invention will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1st Example : Including one resistor connection

1 is a circuit diagram of a relay economizer according to a first embodiment of the present invention. 1 includes a first switch S1 for applying a relay driving voltage VRD of a relay driving power source 108 to a coil L of a relay RLY, A voltage sensing unit 102 and 104 for sensing the size of the relay driving voltage VRD and a coil L of the first switch S1 and the relay RLY, A variable resistance unit 106 and a variable resistance unit R15 varying in resistance according to the magnitude of the relay driving voltage VRD sensed by the voltage sensing units 102 and 104 and the variable resistance units 106 and R15 connected in parallel And a second switch S2.

1 includes a first control signal CS1 for controlling the operation of the first switch S1 and a second control signal CS2 for controlling the operation of the second switch S2, And a control unit 110 for outputting a second control signal CS2 for controlling the first control signal CS2.

The variable resistors 106 and R15 are connected in parallel to the fixed resistor R15 having a predetermined resistance value and the fixed resistor R15, And a resistance parallel connection unit 106 connected or not connected in parallel to the fixed resistor R15 according to the magnitude of the driving voltage VRD.

The voltage sensing units 102 and 104 and the resistance parallel connection unit 106 constitute a resistance connection unit 100. The relay communication unit according to the first embodiment of the present invention shown in FIG. do. However, the relay economizer according to the present invention is not limited to this, and the resistance connection unit 100 including the voltage sensing units 102 and 104 and the resistance parallel connection unit 106 may be used to maintain the relay in three or more holding states. May be included.

The voltage sensing units 102 and 104 may include a voltage dividing unit 102 for dividing the relay driving voltage VRD and a second voltage dividing unit 102 for dividing the relay driving voltage VRD according to the magnitude of the voltage distributed by the voltage distributing unit 102. [ And a switching unit 104.

The voltage divider 102 includes a first resistor R11 having one end to which the relay driving voltage VRD is applied and a second resistor R11 having one end connected to the other end of the first resistor R11, And a resistor R12.

The first switching unit 104 includes a third resistor R13 to which the relay driving voltage VRD is applied at one end and a second resistor R13 connected between the other terminal of the third resistor R13 and the ground, And a third switch SH1 shorted or opened according to the magnitude of the voltage VD1 distributed by the second resistor R12.

The resistance parallel connection unit 106 includes a fourth resistor R14 having one end connected to one end of the fixed resistor R15 and one end connected to the other end of the fourth resistor R14 and the other end connected to the fixed resistor R15 And a fourth switch M1 which is short-circuited or opened according to the operation state of the third switch SH1.

In the first embodiment of the present invention, the third switch SH1 is a shunt regulator conducting when the voltage VD1 applied to the first control terminal CT1 is equal to or higher than the first reference voltage, but the present invention is not limited thereto , The third switch (SH1) may include any type of switching transistor that is shorted or opened according to the voltage applied to the control terminal.

In the first embodiment of the present invention, the fourth switch M1 is a field effect transistor (FET), but the present invention is not limited to this, and the fourth switch M1 may be opened or short- And may include a gate bipolar transistor (IGBT).

The controller 110 may short-circuit the second switch S2 and short-circuit the first switch S1 to bring the relay RLY into a pickup state. In addition, after the relay RLY is brought into the pick-up state, the controller 110 may open the second switch S2 to hold the relay RLY.

In the holding state, the resistance parallel connection unit 106 may be connected in parallel or not connected to the fixed resistor R15 according to the magnitude of the relay driving voltage VRD. When the resistance parallel connection unit 106 is connected to the fixed resistor R15 and the equivalent resistance when the resistance parallel connection unit 106 is not connected to the fixed resistor R15, The resistance value when the fixed resistor R15 and the fourth resistor R14 are connected in parallel is set such that the coil L of the relay RLY is connected to the resistor RLY when the relay RLY is in the holding state, Can be set to be equal to or greater than the minimum holding current holding current. That is, the resistance values of the fixed resistor R15 and the fourth resistor R14 are set such that the current flowing through the coil L of the relay RLY maintains the minimum holding state when the relay RLY is in the holding state And may be selected from among resistance values that make it more than current.

The relay RLY may be maintained in the first holding state and the second holding state according to the magnitude of the relay driving voltage VRD. The magnitudes of the currents flowing through the coil L of the relay RLY in the first holding state and the second holding state are smaller than the magnitude of the current for turning the relay RLY from the turn off state to the pickup state, Lt; RTI ID = 0.0 > RLY < / RTI >

The operation of the relay economizer according to the first embodiment of the present invention will be described below with reference to FIGS. 1 to 6. FIG.

3 is a view for explaining a pickup operation of a relay, FIG. 4 is a view for explaining a first holding operation of the relay, and FIG. 5 is a view for explaining a pickup operation of the relay, 6 is a graph showing a current flowing in a coil of a relay for explaining the operation of the relay economizer according to the first embodiment of the present invention.

In the present invention, only the first switch S1 and the second switch S2 are controlled by the control unit 110 and the switching operation of the third switch SH1 is controlled by the voltage of the voltage input to the first control terminal CT1 And the switching operation of the fourth switch Ml is controlled according to the magnitude of the voltage applied to the gate G. [

The operation of the third switch SH1 which is the shunt regulator is turned on and short-circuited when a first reference voltage or more is applied to the first control terminal CT1, and is turned off when a voltage lower than the first reference voltage is applied .

The operation of the fourth switch M1, which is a field effect transistor, is turned on and short-circuited when the second reference voltage or higher is applied to the gate G, and is turned off when the voltage lower than the second reference voltage is applied.

The operation of the first switch S1 is controlled by the first control signal CS1 outputted from the control unit 110. When the first switch S1 is turned on and short-circuited, the relay drive voltage VRD is supplied to the relay RLY (L) of the coil. Therefore, the turn-on or turn-off of the relay RLY is determined according to the operating state of the first switch S1.

The operation of the second switch S2 is controlled by the second control signal CS2 outputted from the control unit 110 and the coil L of the relay RLY is turned on when the second switch S2 is turned on and short- A large current flows in the coil L of the relay RLY when the second switch S2 is short-circuited and the first switch S1 is turned on and short-circuited, State can be entered. When the relay RLY reaches the pick-up state, the control unit 110 holds the relay RLY in the holding state by turning off the second switch S2 and opening it.

The fourth switch Ml is turned off when the third switch SH1 is turned on so that the fourth resistor R14 is not connected in parallel with the fixed resistor R15 and the fixed resistor R15 is connected to the coil L of the relay RLY, The fourth switch M1 is turned on when the third switch SH1 is turned off so that the fourth resistor R14 is connected in parallel with the fixed resistor R15, A resistor having a resistance value lower than that when only the fixed resistor R15 is connected to the coil L is connected to make the magnitude of the current flowing through the coil L of the relay RLY larger.

That is, the fourth switch Ml can prevent the fourth resistor R14 from being connected or disconnected in parallel to the fixed resistor R15 according to the voltage applied to the gate G, And controls the magnitude of the current flowing through the coil L of the relay RLY according to the magnitude of the current.

Relay pickup ready operation

Fig. 2 is a diagram for explaining the pickup preparation operation of the relay RLY.

Referring to FIG. 2, the controller 110 applies a second control signal CS2 suitable for the second switch S2 to short-circuit the second switch S2 by turning on the second switch S2. Since the first switch S1 is in the turned-off state, the relay RLY is not turned on even when only the second switch S2 is turned on.

The operation of turning on the second switch S2 is the pickup preparation operation before the relay RLY is brought into the pickup state and the parallel resistance equivalent between the fourth resistor R14, the fixed resistor R15, and the second switch S2, To short-circuit the second switch (S2).

Pickup operation of relay

FIG. 3 is a view for explaining the pick-up preparation operation of the relay RLY, and FIG. 6 is a graph showing currents flowing through the coil of the relay for explaining the operation of the relay economizer according to the first embodiment of the present invention.

Referring to FIGS. 3 and 6, the controller 110 turns on the first switch S1 when the second switch S2 is turned on. Since the second switch S2 is short-circuited, the coil L of the relay RLY is connected to the ground. Therefore, when the first switch S1 is turned on, the relay driving voltage VRD is applied to the coil L of the relay RLY, and as shown by the arrow in Fig. 3 and as indicated by P in Fig. 6, The current IP exceeding the minimum pickup current IPM for turning on the switch SW of the relay RLY flows to the coil L of the relay RLY so that the relay RLY is in the pickup state P do.

The first holding operation of the relay

4 and 6, after a pickup operation, the controller 110 controls the second switch S2 at a predetermined time t1, The second switch S2 is turned off by applying a second control signal CS2 suitable for the second switch S2.

It has been described above that the relay driving voltage VRD fluctuates within a predetermined range. 4, it is assumed that the magnitude of the relay driving voltage VRD is equal to or higher than the first level. Since the relay driving voltage VRD is distributed by the voltage distributor 102 and the magnitude of the relay driving voltage VRD is equal to or greater than the first level, the voltage VD1 distributed by the voltage distributor 102 is 3 < / RTI > switch in shunt regulator SH1. Therefore, the third switch, shunt regulator SH1, is turned on. When the shunt regulator SH1 is turned on, the gate of the fourth switch M1 in the resistor parallel connection portion 106 is grounded so that the fourth switch M1 is turned off, and the fourth resistor R14 is connected to the fixed resistor R15).

Thus, the relay driving voltage VRD is applied to the fixed resistor R15 through the coil L of the relay RLY and is supplied to the relay RLY as indicated by the arrow in Fig. 4 and as indicated by H1 in Fig. 6 The current IH1 of the minimum holding current IHM for holding the switch SW of the relay RLY flows to the coil L of the relay RLY so that the relay RLY is in the first holding state H1 .

4 and 6, when the fixed resistor R15 is connected to the coil L of the relay RLY and the relay RLY enters the first holding state H1, the relay RLY The magnitude IH1 of the current flowing through the coil L becomes significantly smaller than the magnitude IP of the current in the pickup state P due to the fixed resistor R15. Therefore, the current consumed by the relay RLY can be reduced.

The second holding operation of the relay

5 is a diagram for explaining the second holding operation of the relay RLY, in which it is assumed that after the first holding operation, the relay driving voltage VRD fluctuates and the magnitude of the relay driving voltage VRD is less than the first level do. Since the relay driving voltage VRD is distributed by the voltage distributor 102 and the relay driving voltage VRD is less than the first level, the voltage VD1 distributed by the voltage distributor 102 is the third switch And becomes less than the first reference voltage of the shunt regulator SH1. Therefore, the third switch, shunt regulator SH1, is turned off. When the shunt regulator SH1 is turned off, a predetermined voltage is applied to the gate of the fourth switch M1 through the third resistor R13 so that the fourth switch M1 is turned on, and the fourth resistor R14 is fixed And is connected in parallel with the resistor R15.

Therefore, the relay driving voltage VRD is applied to the fixed resistor R15 and the fourth resistor R14 through the coil L of the relay RLY, The current IH2 of the minimum holding current IHM for holding the switch SW of the relay RLY flows to the coil L of the relay RLY as shown in FIG. State H2.

5 and 6, the fixed resistor R15 and the fourth resistor R14 are connected to the coil L of the relay RLY so that the relay RLY enters the second holding state H2 The magnitude IH2 of the current flowing through the coil L of the relay RLY is equal to the magnitude IP of the current in the pickup state P due to the fixed resistor R15 and the fourth resistor R14 connected in parallel, ). Therefore, the current consumed by the relay RLY can be reduced.

The equivalent resistance value of the fourth resistor R14 and the fixed resistor R15 connected in parallel shown in FIG. 5 is smaller than the resistance value of one fixed resistor R15 shown in FIG. Therefore, the magnitude IH2 of the current in the second holding state H2 shown in FIG. 5 becomes larger than the magnitude IH1 of the current in the first holding state H1 shown in FIG. However, since the magnitude IH2 of the current in the second holding state H2 is smaller than the magnitude IP of the current in the pickup state P, not only the first holding state H1 but also the second holding state H2, Current consumption in the coil L of the relay RLY can be reduced.

6, the current flowing through the coil L of the relay RLY is changed from the first holding state H1 to the first holding state H1 as the relay driving voltage VRD varies after the pickup operation of the relay RLY And is in the second holding state H2.

Thus, according to the relay economizer according to the first embodiment of the present invention, even if the relay driving voltage VRD fluctuates, the current flowing through the coil L of the relay RLY is reduced from the turn-off state to the pickup state The relay RLY is held in the first holding state H1 or the second holding state RLY so as to be smaller than the magnitude of the current for making the relay RLY and the minimum current magnitude IHM for holding the relay RLY in the holding state H2).

Second Example : When two resistive connections are included

7 is a circuit diagram of a relay economizer according to a second embodiment of the present invention.

The relay economizer according to the second embodiment of the present invention shown in FIG. 7 is a relay economizer that includes an additional resistance connection 101 to the relay economizer according to the first embodiment of the present invention shown in FIG.

The additional resistance connection portion 101 includes fifth to eighth resistors R21, R22, R23 and R24, a fifth switch SH2 and a sixth switch M2. The configurations of the fifth to eighth resistors R21, R22, R23 and R24, the fifth switch SH2 and the sixth switch M2 are the same as those of the resistor connecting portion 100 and will not be described here.

The holding states of the relay economizer according to the second embodiment of the present invention shown in FIG. 7 are a first holding state where a current flows only in the fixed resistor R15, a fixed resistor R15 and a fourth resistor R14 are connected in parallel And a third holding state in which current flows in the second holding state where the current flows and the fourth resistor R14, the eighth resistor R24, and the fixed resistor R15 are all connected in parallel.

That is, in the relay economizer according to the second embodiment of the present invention shown in FIG. 7, after the relay RLY enters the pick-up state, the relay RLY is controlled according to the magnitude of the relay drive voltage VRD, State, a second holding state, or a third holding state. In this case, the magnitude of the current in the first holding state is smaller than the magnitude of the current in the second holding state, and the magnitude of the current in the second holding state is smaller than the magnitude of the current in the third holding state.

The operation of the relay economizer according to the second embodiment of the present invention shown in FIG. 7 is similar to that of the relay economizer according to the first embodiment of the present invention shown in FIG. 2 to FIG.

The relay economizer according to the second embodiment of the present invention shown in FIG. 7 includes two resistance connections 100 and 101, but the relay economizer according to the present invention is not limited thereto. When n is a positive integer, (N + 1) holding state of the relay RLY according to the magnitude of the relay driving voltage VRD, including the first to n-th resistance connection portions.

relay Economist  Control method

8 is a flowchart illustrating a control method of a relay economizer according to an embodiment of the present invention.

Referring to FIGS. 1, 6 and 8, in step S800, the controller 110 short-circuits the second switch S2 to perform a pickup preparation operation before bringing the relay RYL into a pickup state.

In step S802, the controller 110 short-circuits the first switch S1 to supply the relay driving voltage VRD to the relay RLY. The second switch S2 is short circuited and the coil L of the relay RLY is connected to the ground so that a large current larger than the minimum pickup current IPM flows through the coil L of the relay RLY. Therefore, the relay RLY enters the pickup state P.

In step S804, the control unit 110 opens the second switch S2 for a predetermined time t1 after the pickup operation, and keeps the relay RYL in the holding state. The relay RLY may be maintained in the first holding state H1 or the second holding state H2 depending on the magnitude of the relay driving voltage VRD.

Since the magnitude IH1 of the current in the first holding state H1 and the magnitude IH2 of the current in the second holding state H2 are smaller than the magnitude IP of the current in the pickup state P, The current consumption in the coil L of the relay RLY can be reduced if the relay RLY is held in the first holding state H1 or the second holding state H2 according to the voltage VRD.

When n is a positive integer of 2 or more, when the relay economizer of the present invention includes n resistor connecting portions 100, the relay RLY is divided into a first holding state to an (n + 1) . ≪ / RTI >

In this case, in the holding state, the equivalent resistance value of the resistor parallel connection portions and the fixed resistor R15 in the n resistor connecting portions is changed to a plurality of resistance values according to the size of the relay driving voltage VRD, The resistance values include resistance values for causing a current flowing through the relay RLY to be equal to or higher than a minimum holding current holding current IHM, and the holding state holding current is a current for holding the relay RLY And the current flowing through the relay RLY.

The magnitude of the currents flowing through the coil L of the relay RLY in the first to n + 1 holding states is determined by the magnitude of the current for turning the relay RLY from the turn- And is at least the minimum current magnitude (IHM) for holding the relay (RLY) in a holding state.

Although the present invention can be applied to a power relay assembly (PRA) for interrupting the power of a battery system applied to an electric vehicle, the present invention is not limited thereto and can be applied to all devices using relays.

The methods discussed herein may be implemented using various means, depending on the application. For example, these methods may be implemented in the form of hardware, firmware, software, or any combination thereof. In an implementation involving hardware, the control circuitry or control portion may comprise one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), field programmable gate arrays (FPGAs), processors, , Microprocessors, electronic devices, other electronic units designed to perform the functions discussed herein, or a combination thereof.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is clear that the present invention can be modified or improved.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

20: One end of the relay 22: The other end of the relay
100: Resistor connection part 102: Voltage distribution part
104: first switching unit 106: resistance parallel connection unit
108: Relay driving power source 110:
S1: first switch S2: second switch
SH1: third switch M1: fourth switch
RLY: Relay L: Relay coil
SW: Relay switch R11: First resistance
R12: second resistor R13: third resistor
R14: fourth resistor R15: fixed resistor
CT1: Control terminal of shunt regulator

Claims (21)

A first switch for applying a relay driving voltage to the coil of the relay;
At least one voltage sensing unit for sensing a magnitude of the relay driving voltage;
A variable resistor part constituting a closed circuit together with the coils of the first switch and the relay and having a resistance variable according to the magnitude of the relay driving voltage sensed by the at least one voltage sensing part; And
And a second switch connected in parallel to the variable resistance portion. The method according to claim 1,
Further comprising a control section for controlling operations of said first switch and said second switch. The method according to claim 2,
The variable resistor unit includes:
A fixed resistor having a predetermined resistance value; And
And one or more resistor parallel connections connected in parallel to the fixed resistor and connected or not connected in parallel to the fixed resistor according to the magnitude of the relay driving voltage sensed by the one or more voltage sensing units. The method according to claim 3,
Wherein each of the voltage sensing units comprises:
A voltage distributor for distributing the relay driving voltage; And
And a first switching unit short-circuited or opened according to the magnitude of the voltage distributed by the voltage distribution unit. The method of claim 4,
Wherein the voltage distributor comprises:
A first resistor to which the relay driving voltage is applied at one end; And
And a second resistor having one end connected to the other end of the first resistor and the other end connected to ground. The method of claim 5,
Wherein the first switching unit comprises:
A third resistor to which the relay driving voltage is applied at one end; And
And a third switch connected between the other end of the third resistor and ground and shorted or open according to the magnitude of the voltage distributed by the first resistor and the second resistor. The method of claim 6,
Each of the resistance parallel connection portions includes:
A fourth resistor whose one end is connected to one end of the fixed resistor; And
And a fourth switch, one end of which is connected to the other end of the fourth resistor and the other end of which is connected to the other end of the fixed resistor, and which is short-circuited or opened according to the operation state of the third switch. The method of claim 7,
And the third switch includes a shunt regulator or a switching transistor. The method of claim 8,
And the fourth switch includes a field effect transistor or an insulated gate bipolar transistor (IGBT). The method according to claim 3,
Wherein the control unit short-circuits the second switch and short-circuits the first switch to bring the relay into a pick-up state. 12. The method of claim 10,
And the control unit opens the second switch to bring the relay into a holding state after the relay is brought into the pick-up state. 12. The method of claim 11,
Wherein each of the resistance parallel connection units is connected or not connected in parallel to the fixed resistor according to a magnitude of the relay driving voltage, whereby the relay is held in a plurality of holding states, and in each of the plurality of holding states, Wherein the magnitude of the current flowing through the relay is less than a magnitude of a current for turning the relay from a turn off state to a pick up state and a minimum current magnitude for keeping the relay in a holding state. The method of claim 12,
Wherein a resistance value of the variable resistance unit is reduced when a size of the relay driving voltage is increased and a resistance value of the variable resistance unit is increased when a size of the relay driving voltage is decreased. A first switch for applying a relay driving voltage to the coil of the relay; At least one voltage sensing unit for sensing a magnitude of the relay driving voltage; A variable resistor part constituting a closed circuit together with the coils of the first switch and the relay and having a resistance variable according to the magnitude of the relay driving voltage sensed by the at least one voltage sensing part; A second switch connected in parallel to the variable resistor section; And a control unit for controlling operations of the first switch and the second switch, the control method comprising:
(A) shorting the second switch by the control unit;
(B) the controller short-circuits the first switch to supply the relay driving voltage to the coil of the relay to bring the relay into a pickup state; And
(C) the control unit opens the second switch to hold the relay in a holding state,
The resistance value of the variable resistance unit is varied according to the magnitude of the relay driving voltage so that the relay is held in a plurality of holding states and the magnitude of the current flowing through the coils of the relay in each of the plurality of holding states, A method of controlling a relay economizer having a minimum current magnitude to hold in a holding state. The method of claim 14,
The variable resistor unit includes:
A fixed resistor having a predetermined resistance value; And
And at least one resistor parallel connection part connected in parallel to the fixed resistor and connected or not connected in parallel to the fixed resistor according to the magnitude of the relay driving voltage sensed by the at least one voltage sensing part. Way. The method of claim 15,
Wherein each of the voltage sensing units comprises:
A voltage distributor for distributing the relay driving voltage; And
And a first switching unit short-circuited or opened according to the magnitude of the voltage distributed by the voltage distribution unit. The method of claim 16,
Wherein the voltage distributor comprises:
A first resistor to which the relay driving voltage is applied at one end; And
And a second resistor having one end connected to the other end of the first resistor and the other end connected to the ground. The method of claim 17,
Wherein the first switching unit comprises:
A third resistor to which the relay driving voltage is applied at one end; And
And a third switch connected between the other end of the third resistor and the ground and shorted or opened according to the magnitude of the voltage distributed by the first resistor and the second resistor. The method of claim 18,
Each of the resistance parallel connection portions includes:
A fourth resistor whose one end is connected to one end of the fixed resistor; And
And a fourth switch connected at one end to the other end of the fourth resistor and at the other end to the other end of the fixed resistor and shorted or opened according to an operating state of the third switch. The method of claim 19,
Wherein the third switch includes a shunt regulator or a switching transistor. A power relay assembly comprising a relay economizer according to claim 2.
KR1020130101670A 2013-08-27 2013-08-27 Relay economizer and method of controlling the same KR102046124B1 (en)

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CN107946139A (en) * 2017-12-20 2018-04-20 广汽丰田汽车有限公司 The relay control system and method and vehicle of vehicle
KR20190020521A (en) * 2017-08-21 2019-03-04 엘지전자 주식회사 Air conditioner
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