CN2189792Y

CN2189792Y - High and low voltage relay with backlash

Info

Publication number: CN2189792Y
Application number: CN 94241761
Authority: CN
Inventors: 巫忆陵; 于锁平
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-04-28
Filing date: 1994-04-28
Publication date: 1995-02-15
Anticipated expiration: 2004-04-28

Abstract

The utility model discloses a high and low voltage relay with backlash, relating to a voltage comparator relay. The utility model travels through a switching circuit that is controlled by a high voltage comparator and a hyper-low voltage comparator operation voltage, and then controls an additional voltage that can obtain a stable voltage to act on the reference voltage of each comparator or not. In consequence, the utility model changes the condition of prior art that the return difference voltage is mutually contained with the comparator operation voltage, gets the operation voltage value and the return difference voltage value of the utility model easy to set, gets the return difference voltage adjustable in a large range, and gets the repetitiveness of the utility model good.

Description

High and low voltage relay with backlash

The utility model relates to the voltage comparator relay.

In the prior art, all kinds of voltage comparators that certain hysteresis voltage is set are arranged, it is the Si Mite comparator that is made of amplifier that its hysteresis voltage produces circuit, is promptly received the positive input terminal of amplifier and produces certain return difference value through a resistance by the output of amplifier.In this class comparator, operation voltage value and hysteresis voltage value check and balance, and be difficult when adjusting; The hysteresis voltage value is directly relevant with amplifier voltage, poor repeatability; In addition, become irreversible trigger for preventing comparator, amount of positive feedback can not be too big, causes the hysteresis voltage value to be restricted.

The utility model aims to provide a kind of operation voltage value and the hysteresis voltage value is easily adjusted, hysteresis voltage is adjustable on a large scale, the high-low voltage relay of good reproducibility.

For achieving the above object, the utility model is to solve like this: constituted high pressure ratio than device by an amplifier, constituted the low pressure comparator by another amplifier, crossing high pressure ratio is the input of sampling voltage than the positive input terminal of device and the negative input end of mistake low pressure comparator, cross high pressure ratio and then insert the reference voltage that presses limit value and cross the low pressure lower limit as too high respectively than the negative input end of device and the positive input terminal of mistake low pressure comparator, the output of two amplifiers is controlled a relay respectively with the control external circuit, the output of two amplifiers is also controlled a switching circuit and a phase-veversal switch circuit respectively, and they are controlled an auxiliary voltage respectively and whether act on separately reference voltage.These two auxiliary voltages are obtained by supply voltage by different circuit respectively, and its size is stable.So just, realized the indirect association of the output voltage and the operation voltage of transport and placing device, promptly output voltage can change operation voltage, but the size of this change be can't help output voltage decision, but by the size decision of auxiliary voltage.

When supply voltage fluctuateed in allowed limits, the output of two transport and placing devices was zero, and the forward switching circuit disconnects, and the phase-veversal switch circuit is connected, and two relays are all connected; When supply voltage during greater than the higher limit that allows, cross high pressure ratio and be output as the amplifier supply voltage value than device, the high-voltage relay of crossing of this comparator control disconnects, the forward switching circuit is connected simultaneously, being added in high pressure ratio works than the auxiliary voltage on the device, cross the reference voltage change of high pressure ratio than device, this obtains a size and the irrelevant hysteresis voltage of operation voltage size; When supply voltage during less than the lower limit that allows, cross low pressure comparator output amplifier supply voltage value, the low-voltage relay of crossing of this comparator control disconnects, the phase-veversal switch circuit disconnects simultaneously, the auxiliary voltage that was added on the low pressure comparator works, the reference voltage of crossing the low pressure comparator changes, and in like manner produces a required return difference.

Because amplifier output voltage operation voltage indirect association makes and adjusts easily; The size that reference voltage changes is determined by auxiliary voltage, makes that good reproducibility and hysteresis voltage value size are unrestricted, thereby has avoided the frequent movement of high-low voltage relay.

In the utility model, the transport and placing device output of two relays is also controlled a display circuit of being made up of light-emitting diode respectively.

Below in conjunction with drawings and Examples the utility model is further described:

Fig. 1 is the user mode figure of an embodiment of the utility model

Fig. 2 is the block diagram of this embodiment

Fig. 3 is the circuit diagram of this embodiment

Fig. 4 is another embodiment in hysteresis voltage loop

Fig. 5 is another embodiment that auxiliary voltage forms the loop

Embodiment shown in Figure 1 takes back poor storage battery to cross high pressure and cross the low-voltage variation relay.Represent with K among the figure that it is in parallel with storage battery, cross high pressure protection relay K ₁The low-voltage variation relay K is crossed in control charge in batteries loop ₂The control load loop.When supply voltage Vx fluctuates in allowed limits, K ₁, K ₂Connect, charge circuit and load circuit are connected simultaneously; When supply voltage during greater than the higher limit that allows, K ₁Disconnect, the charge in batteries loop disconnects, until supply voltage during less than the difference of release movement voltage and hysteresis voltage, and K ₁Reclose, charge circuit is connected; When supply voltage during less than the lower limit that allows, K ₂Disconnect; Load circuit disconnects, until supply voltage during greater than release movement voltage and hysteresis voltage sum, and K ₂Reclose, so just guaranteed that storage battery can not be damaged.

Referring to Fig. 2, Fig. 3, Vx is an input voltage, N ₁, N ₁For the single power supply dual comparator, as LM319, power circuit is by R ₁, V ₁, C ₁Form, to obtain quality voltage preferably.Sample circuit is by R ₈, R ₉, R ₁₀, C ₂Form, wherein C ₂Be in order to eliminate the transient fluctuation of input voltage.Cross high pressure ratio than device by R ₄, N ₁, R ₁₉Form.Cross high pressure ratio than the output voltage of device by electronic switch V ₅Controlled high pressure protection relay K ₁And by light-emitting diode V ₇, resistance R ₆The high voltage protective indicating circuit of forming excessively.Auxiliary voltage is by V ₄Obtain, it is by electronic switch V ₂Whether control acts on by R ₂, V ₃, V ₄, R ₃, R ₄The high pressure reference voltage excessively that obtains, R ₃Can be with V ₃, V ₄Series connection voltage stabilizing value decay to set point.

Cross the low pressure comparator by R ₁₇, N ₂, R ₂₀Form, the output voltage of crossing the low pressure comparator is by electronic switch V ₁₀Controlled the low-voltage variation relay K ₂And by light-emitting diode V ₉, resistance R ₁The 3 mistake low-voltage variation indicating circuits of forming.Auxiliary voltage is by V ₁₄Obtain, it is by R ₁₀, V ₁₁, R ₁₅Whether the inversion electron switch control of forming acts on by R ₁₄, V ₁₃, V ₁₄, R ₁₆, R ₁₇The mistake low pressure reference voltage that obtains.R ₁₆Can be with V ₁₃, V ₁₄Series connection voltage stabilizing value decay to set point.

The course of work of this embodiment is as follows: when battery tension Vx is between lower limit 42V～higher limit 58V, and the equal adhesive of overvoltage relay under-voltage relay, its contact is connected charge circuit and load circuit respectively; When Vx 〉=58V(higher limit) time, overvoltage relay discharges, and its contact disconnects charge in batteries loop, drops to up to battery tension to be lower than 52V and just can to connect the charge in batteries loop automatically when following; If the AC power dead electricity, then storage battery is to load discharge, when Vx≤42V(lower limit) time, under-voltage relay discharges, and its contact disconnecting consumers loop rises to 46V up to battery tension and just can reclose load circuit automatically when above.

Certainly the utility model is not limited to the described structure of embodiment: the type structure of switching circuit can be that diversified, shown in Figure 4 embodiment passes through relay K ₃Thereby the short circuit voltage-stabiliser tube has changed reference voltage level V '; It also can be then to be to pass through K switch among diversified, the shown in Figure 5 embodiment that auxiliary voltage forms circuit ₄The short circuit reference voltage forms the resistance R in the circuit ₂₁Thereby, change reference voltage level V '.

Claims

1; a kind ofly take back poor high-low voltage relay; comprise sample circuit; cross the high pressure reference voltage and form circuit; cross high pressure ratio than device; cross the high pressure protection relay; it is characterized in that: it comprises that also two switching circuits and two auxiliary voltages that can obtain the stable voltage of size form circuit; cross wherein that high pressure ratio inserts a switching circuit than the output of device and then whether the control auxiliary voltage acted on the high pressure reference voltage; the output of crossing the low pressure comparator inserts another switching circuit and whether acted on the low pressure reference voltage to control another auxiliary voltage, to guarantee the high pressure reference voltage and to cross that the hysteresis voltage that obtains on the low pressure reference voltage is subjected to the control of comparator output voltage and its size be can't help the size of comparator output voltage and determined.

2, take back poor high-low voltage relay according to claim 1 is described, it is characterized in that: described auxiliary voltage forms circuit and formed circuit and cross the voltage-stabiliser tube that the low pressure reference voltage forms on the circuit and form by being connected on the high pressure reference voltage, thereby it passes through switching circuit whether with the change of its short circuit realization reference voltage level.

3, according to claim 1ly take back poor high-low voltage relay, it is characterized in that: it was that the high pressure reference voltage forms circuit and crosses the low pressure reference voltage and forms the part that can obtain burning voltage in the circuit that described auxiliary voltage forms circuit, thereby whether it realize its short circuit the change of reference voltage level by switching circuit.

4, according to claim 1 or 2 or 3 arbitrary described poor high-low voltage relays of taking back; it is characterized in that: this relay comprises that also of forming with light-emitting diode crosses high voltage protective indicating circuit and one and crosses the low-voltage variation indicating circuit, and these two indicating circuits are controlled by two corresponding comparators respectively.