CN202586484U - Double-circuit power supply circuit having precharge function during electrification and high-voltage frequency converter - Google Patents
Double-circuit power supply circuit having precharge function during electrification and high-voltage frequency converter Download PDFInfo
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- CN202586484U CN202586484U CN 201220086983 CN201220086983U CN202586484U CN 202586484 U CN202586484 U CN 202586484U CN 201220086983 CN201220086983 CN 201220086983 CN 201220086983 U CN201220086983 U CN 201220086983U CN 202586484 U CN202586484 U CN 202586484U
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Abstract
The utility model relates to a double-circuit power supply circuit having a precharge function during electrification and a high-voltage frequency converter. The double-circuit power supply circuit comprises a first power switching unit, a second power switching unit, a precharge control unit and a precharge unit, wherein the precharge control unit is conducted when it is turned on, a first power input exists, and the second power switching unit is in disconnected, and the first power input end is connected to a second power input end through the precharge unit; the first power switching unit is conducted when the first power input exists and the second power switching unit is disconnected, and a first circuit power is supplied; and the second power switching unit is conducted when it is turned on and the first power switching unit is disconnected, and power is supplied by a second circuit power. The double-circuit power supply circuit having a precharge function during electrification and the high-voltage frequency converter in the utility model precharge the second circuit power when a system is powered on, electric interlocking is adopted when power sources of two circuits are switched, so as to ensure that power is not supplied by the power sources of the two circuits at the same time, the control method is simple, and reliability is high.
Description
Technical field
The utility model relates to the circuit engineering field, more particularly, relates to a kind of double loop power supply circuit and high voltage converter with the pre-charging functions that powers on.
Background technology
Along with rapid development of economy, industrial control field is also carrying out variation with rapid changepl. never-ending changes and improvements, but the power supply of system almost also rests on initial single powering mode.Propose also in succession in the industry that double loop power supply switches even multiple power supplies switched design scheme more; Really these schemes have its feasible one side; Such as giving one not need precharge or the little system's power supply of energy storage; Existing scheme practical function is all right, can realize reliably that multiple power supplies switches, and can carry out corresponding overvoltage, protection such as under-voltage.
But; Operation part is too numerous and diverse in the design that existing double loop power supply switches; Practicality remains to be improved; Especially be that existing design can not meet the demands in the time of need carrying out precharge with the impact that reduces to power on to system system's initial stage of powering on when there is a large amount of energy-storage travelling wave tubes in the system that needs power supply.
The utility model content
The technical problem that the utility model will solve is do not have the pre-charging functions of powering on to existing double loop power supply circuit and cause the flimsy defective of Device element, and a kind of double loop power supply circuit and high voltage converter with the pre-charging functions that powers on is provided.
The utility model solves the technical scheme that its technical problem adopted: construct a kind of double loop power supply circuit with the pre-charging functions that powers on, comprising: the first power supply switch unit, second source switch unit, precharge control unit and precharge unit;
Said precharge control unit is connected to the second road power input with said first via power input through said precharge unit being unlocked and having the conducting when being in off-state of first via power supply input and said second source switch unit;
The said first power supply switch unit is connected to the double loop power supply circuit output end having the conducting when being in off-state of first via power supply input and said second source switch unit with said first via power input;
Said second source switch unit is connected to said double loop power supply circuit output end with said the second road power input through precharge unit being unlocked and the conducting when being in off-state of the said first power supply switch unit.
In the described double loop power supply circuit with the pre-charging functions that powers on according to the utility model, said first via power input place is provided with electric power incoming line circuit breaker Q F1.
In described double loop power supply circuit with the pre-charging functions that powers on according to the utility model; Said precharge unit comprises: be connected on the precharge control unit output and the A.C. contactor KM4 on the every phase circuit between the second road power input often open main contacts; On every phase circuit, be connected in parallel on the pre-charge resistance at said A.C. contactor KM4 two ends, and the end of incoming cables of often opening main contacts of said A.C. contactor KM4 and be connected on the first phase circuit and the second phase circuit between the coil, coil and the timing closing contact of time relay KT of A.C. contactor KM4.
In described double loop power supply circuit with the pre-charging functions that powers on according to the utility model; The said first power supply switch unit comprise be connected on the A.C. contactor KM1 on every phase circuit between said first via power input and the said double loop power supply circuit output end often open main contacts, and the end of incoming cables of often opening main contacts of said A.C. contactor KM1 and be connected on the first phase circuit and the second phase circuit between coil and the normally closed auxilliary contact of A.C. contactor KM2 of A.C. contactor KM1; Said second source switch unit comprise be connected on the electric power incoming line circuit breaker Q F2 on every phase circuit and A.C. contactor KM2 between said precharge unit and the said double loop power supply circuit output end successively often open main contacts, and the end of incoming cables of often opening main contacts of said A.C. contactor KM2 and be connected on the first phase circuit and the second phase circuit between coil and the normally closed auxilliary contact of A.C. contactor KM1 of A.C. contactor KM2.
In described double loop power supply circuit with the pre-charging functions that powers on according to the utility model; The said first power supply switch unit also comprises the auxilliary contact of often opening of A.C. contactor KM1 and the first indicator light HL1; Said A.C. contactor KM1 often open auxilliary contact and first indicator light HL1 series connection after, be connected in parallel on the two ends of normally closed auxilliary contact of coil and the A.C. contactor KM2 of said A.C. contactor KM1; Said second source switch unit also comprises the auxilliary contact of often opening of A.C. contactor KM2 and the second indicator light HL2; Said A.C. contactor KM2 often open auxilliary contact and second indicator light HL2 series connection after, be connected in parallel on the two ends of normally closed auxilliary contact of coil and the A.C. contactor KM1 of said A.C. contactor KM2.
In described double loop power supply circuit with the pre-charging functions that powers on according to the utility model; The said first power supply switch unit also comprises in the end of incoming cables of often opening main contacts of said A.C. contactor KM1 and is connected on the coil of the auxiliary relay KA1 between the second phase circuit and the third phase circuit, and be connected on auxiliary relay KA1 between the normally closed auxilliary contact of coil and A.C. contactor KM2 of said A.C. contactor KM1 often open main contacts; Said second source switch unit also comprises in the end of incoming cables of often opening main contacts of said A.C. contactor KM2 and is connected on the coil of the auxiliary relay KA2 between the second phase circuit and the third phase circuit, and be connected on auxiliary relay KA2 between the normally closed auxilliary contact of coil and A.C. contactor KM1 of said A.C. contactor KM2 often open main contacts.
In the described double loop power supply circuit with the pre-charging functions that powers on according to the utility model, the said first power supply switch unit also comprises with the coil of said auxiliary relay KA1 and is connected on the said second normally closed auxilliary contact of the auxiliary relay KA2 between circuit and the third phase circuit mutually together; Said second source switch unit also comprises with the coil of said auxiliary relay KA2 and is connected on the said second normally closed auxilliary contact of the auxiliary relay KA1 between circuit and the third phase circuit mutually together.
In described double loop power supply circuit with the pre-charging functions that powers on according to the utility model; What said precharge control unit comprised A.C. contactor KM3 on the every phase circuit that is connected between said first via power input and the said precharge unit often opens main contacts, and the end of incoming cables of often opening main contacts of said A.C. contactor KM3 and be connected on the first phase circuit and the second phase circuit between the normally closed auxilliary contact of coil, charge initiation button SBQ, charging stop button SBT, key button SA and electric power incoming line circuit breaker Q F2 of A.C. contactor KM3; And be connected in parallel on said charge initiation button SBQ two ends A.C. contactor KM3 often open auxilliary contact.
The utility model also provides a kind of high voltage converter, comprises aforesaid double loop power supply circuit with the pre-charging functions that powers on.
Implement the double loop power supply circuit and the high voltage converter with the pre-charging functions that powers on of the utility model; Have following beneficial effect: the utility model adopts when powering in system precharge control unit and precharge unit that the second road power supply is charged; And carrying out adopting electrical interlocks when the two-way power supply switches; Guarantee can not supply power simultaneously, and its control mode is simple, reliability is high.
Description of drawings
To combine accompanying drawing and embodiment that the utility model is described further below, in the accompanying drawing:
Fig. 1 is the schematic diagram of the double loop power supply circuit of the pre-charging functions that powers on according to having of the utility model;
Fig. 2 is the circuit theory diagrams of the precharge section of the double loop power supply circuit that has the pre-charging functions that powers among Fig. 1;
Fig. 3 is the schematic diagram of the control loop of the precharge control unit of the double loop power supply circuit that has the pre-charging functions that powers among Fig. 1;
Fig. 4 is the schematic diagram of the control loop of the precharge unit of the double loop power supply circuit that has the pre-charging functions that powers among Fig. 1;
Fig. 5 is the circuit theory diagrams of double loop power supply switching part with double loop power supply circuit of the pre-charging functions that powers on.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.
See also Fig. 1, be the schematic diagram of the double loop power supply circuit of the pre-charging functions that powers on according to having of the utility model.As shown in Figure 1, this double loop power supply circuit with the pre-charging functions that powers on comprises: the first power supply switch unit 10, second source switch unit 20, precharge control unit 30 and precharge unit 40.
Wherein, precharge control unit 30 is in off-state usually, and only just conducting when meeting the following conditions is connected to the second road power input J2 with first via power input J1 through precharge unit 40.This first via power supply can be the 380V electric main of electricity network supply.Precharge control unit 30 need satisfy the conducting of following three conditions ability simultaneously: 1, system powers on, and promptly has the input of first via power supply; When 2, user's charging of opening charge switch such as the follow-up introduction of precharge control unit 30 was released the button, promptly precharge control unit 30 was unlocked; When 3, second source switch unit 20 is in off-state.
When being used for powering in system, precharge unit 40 first via power supply is supplied with the second tunnel power source charges through second source input J2; For example shift to the secondary 380VAC winding of transformer; With realization the counter of phase shifting transformer sent; 24 groups of 690VAC secondary of corresponding phase shifting transformer induce voltage and give the power cell power supply of corresponding high voltage converter respectively, make its corresponding other secondary induce voltage, realize functions such as power cell back-to-back testing.Precharge unit 40 in the utility model has effectively reduced directly the second road power supply to make the anti-electricity that send become possibility as shifting to the transformer secondary caused impulse current of supplying power through the precharge metering function.
The first power supply switch unit 10 is used to switch first via power supply through double loop power supply circuit output end J3 output.The first power supply switch unit 10 need satisfy the conducting of following 2 conditions ability simultaneously: 1, system powers on, and promptly has the input of first via power supply; 2, second source switch unit 20 is in off-state.When the first power supply switch unit 10 is in conducting state first via power input J1 is connected to double loop power supply circuit output end J3.
Second source switch unit 20 is used to switch the second road power supply through double loop power supply circuit output end J3 output.Second source switch unit 20 need satisfy the conducting of following 2 conditions ability simultaneously: 1, second source switch unit 20 is unlocked, and promptly the user opens second source switch unit 20 through the electric power incoming line circuit breaker Q F2 of switch such as follow-up introduction; 2, the first power supply switch unit 10 is in off-state.When second source switch unit 20 is in conducting state the second road power input J2 is connected to double loop power supply circuit output end J3.The second road power input J2 is connected to double loop power supply circuit output end J3 through precharge unit 40, supplies power to control system.
Realize describing in the face of the physical circuit of above-mentioned each unit down.
As shown in Figure 1, in preferred embodiments more of the present invention, be provided with electric power incoming line circuit breaker Q F1 at first via power input J1 place.The user can control the input of first via power supply through the break-make of this electric power incoming line circuit breaker Q of control F1.
Please combine to consult Fig. 2-Fig. 4, be respectively the circuit theory diagrams of the precharge section of the double loop power supply circuit that has the pre-charging functions that powers among Fig. 1.Wherein, precharge control unit 30 comprises that mainly A.C. contactor KM3's on the every phase circuit that is connected between first via power input J1 and the precharge unit 40 often opens main contacts.Precharge control unit 30 also comprises the control loop of the A.C. contactor KM3 of the end of incoming cables of often opening main contacts that is positioned at A.C. contactor KM3, like coil, the charge initiation button SBQ that is connected on the A.C. contactor KM3 between the first phase circuit a1 and the second phase circuit b1 among Fig. 3, the normally closed auxilliary contact of charge stop button SBT, key button SA and electric power incoming line circuit breaker Q F2.And what charge initiation button SBQ two ends were parallel with A.C. contactor KM3 often opens auxilliary contact.
Introduce in the face of the operation principle of the precharge section of the double loop power supply circuit with the pre-charging functions that powers on of the utility model down.
Be provided with normally closed auxilliary contact and the key button SA of electric power incoming line circuit breaker Q F2 in the control loop of the coil of the A.C. contactor KM3 of Fig. 3; Both all play a protective role; The electric power incoming line circuit breaker Q F2 that only makes at second source switch unit 20 often to open main contacts not closed; When being the normally closed auxilliary closing of contact of electric power incoming line circuit breaker Q F2, and could make the coil of A.C. contactor KM3 power under the key button SA situation about opening, so closed A.C. contactor KM3 often open main contacts.
In use; What the user confirmed electric power incoming line circuit breaker Q F2 often opens main contacts when not closed, can open key button SA, closed electric power incoming line circuit breaker Q F1; Then first via power supply gets into the inlet wire side of often opening main contacts of A.C. contactor KM3; Press charge initiation button SBQ this moment, and the coil of A.C. contactor KM3 gets electric, and the auxilliary closing of contact of often opening of A.C. contactor KM3 realizes charged self-sustaining.At this moment A.C. contactor KM3 often open the main contacts closure, first via power supply is admitted to precharge unit 40.
Because the main contacts of often opening of A.C. contactor KM4 is an off-state at the initial stage of powering on, therefore sends into the signal of telecommunication of precharge unit 40 and supply with the second road power input J2, as connecting transformer secondary 380VAC winding side through pre-charge resistance R1-R3.The control loop of the time relay is positioned at the end of incoming cables simultaneously; Then the time relay starts timing; The coil timing of time relay KT finishes the back time relay timing closing closing of contact; It is electric that the coil of A.C. contactor KM4 is got, and then the main contacts closure of often opening of A.C. contactor KM4 is cut away pre-charge resistance R1-R3 and realized normal power supply.And when needs cut off circuit, only needing to charge, stop button SBT pressed or deenergization inlet wire side circuit breaker Q F1 gets final product.The timing numerical value of time relay KT also need be set according to calculating in advance before on-test, otherwise does not reach precharge effect.
The selection of pre-charge resistance resistance also is crucial in precharge unit 40; The abominable situation of impedance and the electrical network input voltage of du/dt capacity, transformer secondary that it need consider current capacity, the DC loop capacitive element of through-current capability, the power device of resistance self in normal fluctuation range etc.; Relatively complicated, generally speaking: can be according to actual circuit structure, on the basis of initial option resistance parameter; Charging process is carried out emulation; The maximum impact electric current and the maximum power dissipation of search pre-charge resistance are depicted the corresponding charging interval of different pre-charge resistance resistances and the relation of circuital current, select proper tissue; In practical application, be optimized again then according to actual effect.
Please combine to consult Fig. 5, be the circuit theory diagrams of the double loop power supply switching part of double loop power supply circuit with the pre-charging functions that powers on.As shown in Figure 5, the first via power supply and the second road power supply are realized to double loop power supply circuit output end J3 output control through control circuit shown in Figure 5.
The first power supply switch unit 10 comprise at least be connected on the A.C. contactor KM1 on every phase circuit between first via power input J1 and the double loop power supply circuit output end J3 often open main contacts.The first power supply switch unit 10 also comprises the control loop of the A.C. contactor KM1 of the end of incoming cables of often opening main contacts that is positioned at A.C. contactor KM1, the coil of the A.C. contactor KM1 between the first phase circuit A1 and the second phase circuit B1 and the normally closed auxilliary contact of A.C. contactor KM2 of being connected on as shown in Figure 5.
Equally, second source switch unit 20 comprise be connected on the electric power incoming line circuit breaker Q F2 on every phase circuit and A.C. contactor KM2 between precharge unit 40 and the double loop power supply circuit output end J3 successively often open main contacts.Second source switch unit 20 also comprises the control loop of the A.C. contactor KM2 of the end of incoming cables of often opening main contacts that is positioned at said A.C. contactor KM2, the coil of the A.C. contactor KM2 between the first phase circuit A2 and the second phase circuit B2 and the normally closed auxilliary contact of A.C. contactor KM1 of being connected on as shown in Figure 5.
, the key button of confirming precharge control unit 30 just can carry out the double loop power supply power supply when being in off-state.During the power supply of first via power supply; Power turn-on lead-in circuit breaker QF1, first via power supply inputs to the end of incoming cables of the normally closed auxilliary contact of A.C. contactor KM1, at this moment; Have only when 20 disconnections of second source switch unit; When being the normally closed auxilliary closing of contact of A.C. contactor KM2, the coil of A.C. contactor KM1 gets electric, makes that A.C. contactor KM1's on the three-phase line often opens the main contacts closure; The first power supply switch unit 10 is in conducting state, and first via power input J1 is connected to double loop power supply circuit output end J3.Simultaneously, the normally closed auxilliary contact that is positioned at the A.C. contactor KM1 on the control loop of A.C. contactor KM2 is broken off, and makes the main contacts of often opening of A.C. contactor KM2 be in off-state, has avoided the second road power supply to infeed double loop power supply circuit output end J3.
When second source switch unit 20 is unlocked; Be that electric power incoming line circuit breaker Q F2 is closed, and the first power supply switch unit 10 break off, promptly during the normally closed auxilliary closing of contact of A.C. contactor KM1; The coil of A.C. contactor KM2 gets; What make A.C. contactor KM2 on the three-phase line often opens the main contacts closure, and second source switch unit 20 is in conducting state, and the second road power input J2 is connected to double loop power supply circuit output end J3.Simultaneously; The normally closed auxilliary contact that is positioned at the A.C. contactor KM2 on the control loop of A.C. contactor KM1 is broken off; The coil of A.C. contactor KM2 gets the electric main contacts of often opening of A.C. contactor KM2 that makes and is in off-state, has avoided first via power supply to infeed double loop power supply circuit output end J3.During the power supply of the second road power supply, the second road power supply carries out current limliting from the output of transformer 380VAC secondary through pre-charge resistance R1-R3; Relay K T work timing start-up time simultaneously; Timing finishes coil by A.C. contactor KM4 and gets electricly, and A.C. contactor KM4 often leaves the main contacts closure, switches and falls pre-charge resistance R1-R3; This moment, the second road power supply normally inputed to the input side of electric power incoming line circuit breaker Q F2, and relevant thereafter operation principle is identical with first via power supply.
This shows that the A.C. contactor KM1 of the utility model, KM2 are through both first heavy electrical interlocks effects of the normally closed auxilliary contact realization of string oneself mutually in the other side's coil control circuit.
In other preferred embodiments of the utility model; The first power supply switch unit 10 also comprises the auxilliary contact of often opening of A.C. contactor KM1 and the first indicator light HL1; This A.C. contactor KM1 often open auxilliary contact and first indicator light HL1 series connection after, be connected in parallel on the two ends of normally closed auxilliary contact of coil and the A.C. contactor KM2 of A.C. contactor KM1.Said second source switch unit 20 also comprises the auxilliary contact of often opening of A.C. contactor KM2 and the second indicator light HL2; This A.C. contactor KM2 often open auxilliary contact and second indicator light HL2 series connection after, be connected in parallel on the two ends of normally closed auxilliary contact of coil and the A.C. contactor KM1 of A.C. contactor KM2.Therefore; When the coil of A.C. contactor KM1 gets when electric, A.C. contactor KM1 often leaves the auxilliary closing of contact, and the first indicator light HL1 lights; And self-sustaining is realized in the loop via the auxilliary contact of often opening of A.C. contactor KM1 and the first indicator light HL1, realizes the power supply of first via power supply.In like manner; When the coil of A.C. contactor KM2 gets when electric, A.C. contactor KM2 often leaves the auxilliary closing of contact, and the second indicator light HL2 lights; And self-sustaining is realized in the loop via the auxilliary contact of often opening of A.C. contactor KM2 and the second indicator light HL2, realizes the power supply of the second road power supply.
In other preferred embodiments of the utility model, the first power supply switch unit 10 also comprises the control loop of the auxiliary relay KA1 of the end of incoming cables of often opening main contacts that is positioned at A.C. contactor KM1.The coil of this auxiliary relay KA1 is connected between the second phase circuit B1 and the third phase circuit C1; Auxiliary relay KA1 often leaves on the control loop that main contacts is connected on A.C. contactor KM1, for example is connected between the normally closed auxilliary contact of coil and A.C. contactor KM2 of A.C. contactor KM1.Correspondingly, second source switch unit 20 also comprises the control loop of the auxiliary relay KA2 of the end of incoming cables of often opening main contacts that is positioned at A.C. contactor KM2.The coil of this auxiliary relay KA2 is connected between the second phase circuit B2 and the third phase circuit C2; Auxiliary relay KA2 often leaves on the control loop that main contacts is connected on A.C. contactor KM2, for example is connected between the normally closed auxilliary contact of coil and A.C. contactor KM1 of A.C. contactor KM2.The setting of auxiliary relay KA1 and auxiliary relay KA2 is when the three-phase line phase shortage, break off A.C. contactor KM1 often open main contacts and A.C. contactor KM2 often open main contacts, reach the purpose of open-phase protection.
In other preferred embodiments of the utility model, the first power supply switch unit 10 also comprises with the coil of auxiliary relay KA1 and is connected on the second normally closed auxilliary contact of the auxiliary relay KA2 between circuit B1 and the third phase circuit C1 mutually together.Correspondingly, second source switch unit 20 also comprises with the coil of said auxiliary relay KA2 and is connected on the second normally closed auxilliary contact of the auxiliary relay KA1 between circuit B2 and the third phase circuit C2 mutually together.This shows that auxiliary relay KA1, KA2 also realize both electrical interlockses through the normally closed auxilliary contact of mutual string in the other side's coil control circuit oneself, reach the effect of the second heavy electrical interlocks, the serious situation of effectively having avoided double loop power supply to supply power simultaneously.
The double loop power supply circuit with the pre-charging functions that powers on that the utility model provides also has following function except having the pre-charging functions of powering on and double loop power supply handoff functionality:
1) overload and short-circuit protection
Owing to be provided with a plurality of electric power incoming line circuit breakers in the circuit, the electric current of circuit can be more a lot of greatly than normal electric current when overload and short trouble take place in system, and at this moment the electric power incoming line circuit breaker can automatic disconnection be realized overload and short-circuit protection.
2) decompression and under-voltage protection
When first via power source voltage seriously descends (drop to rated voltage 85%) because of certain reason or disappears; The electromagnetic force of A.C. contactor KM1 and auxiliary relay KA1 descends or disappears; Make the armature of A.C. contactor KM1 and auxiliary relay KA1 discharge; Both main contacts of often opening all break off, and power supply stops the system's power supply to output, realizes the decompression and the under-voltage protection of power supply.The decompression of the second road power supply is identical with first via power supply with the under-voltage protection principle.
3) open-phase protection
When first via power supply is in external power supply state; When the first phase circuit A1 or the second phase circuit B1 phase shortage occurring; Interrupt in the loop that is connected between the first phase circuit A1 and the second phase circuit B1; The coil losing electricity of A.C. contactor KM1, it is often opened main contact and breaks off, and first via power supply stops external power supply; When third phase circuit C1 phase shortage occurring; Interrupt in loop between the second phase circuit B1 and the third phase circuit C1, auxiliary relay KA1 coil losing electricity, and it is often opened main contact KA1 and breaks off; It has cut off the loop between the first phase circuit A1 and the second phase circuit B1; Make the coil losing electricity of A.C. contactor KM1, it is often opened main contact and breaks off, and first via power supply stops external power supply; When the second phase circuit B1 phase shortage occurring, the coil of the coil of A.C. contactor KM1 and auxiliary relay KA1 is dead electricity simultaneously, and the main contacts of often opening of A.C. contactor KM1 breaks off, and first via power supply stops external power supply.Before first via power supply is externally supplied power; In the first phase circuit A1, the second phase circuit B1 and the third phase circuit C1 three-phase alternating current; As long as appearance scarce is electricity mutually, the coil of A.C. contactor KM1 can not get electric, thereby the main contacts of often holding of A.C. contactor KM1 can not supplied power outward by closed pair.The second road power supply open-phase protection principle is the same.
4) supply power with double circuit and contrary send electric protection
When first via power supply is externally supplied power; Electric power incoming line circuit breaker Q F1 and A.C. contactor KM1 are in closure state; Electric power incoming line circuit breaker Q F2 and A.C. contactor KM2 are in the disjunction state; The coil of auxiliary relay KA1 gets electric its normally closed auxilliary contact action that makes, and it is electric that normally closed change disconnection guarantees that the auxiliary relay KA2 of the second road power supply can not get, thereby the coil of guaranteeing A.C. contactor KM2 can not get the electric adhesive that makes it; The coil control circuit of A.C. contactor KM1 gets; Make string also break off in the normally closed auxilliary contact of the A.C. contactor KM1 of A.C. contactor KM2 coil control circuit; And then the coil of A.C. contactor KM2 also can be closed, the power supply of the second road power supply when both combinations have effectively prevented the power supply of first via power supply.In addition; There is key button SA to carry out locking in the coil control circuit of A.C. contactor KM3, comprehensively draws when carrying out the double loop power supply power supply and the time need worry neither that the double loop power supply power supply of supplying power simultaneously when yet worrying the power supply of first via power supply can contrary not deliver to the second road power input.
The utility model also provides a kind of high voltage converter, and it comprises aforesaid double loop power supply circuit with the pre-charging functions that powers on.
The utility model scheme improves on the basis of existing double loop power supply circuit that it is had on decompression, under-voltage, overcurrent, short circuit, phase shortage, the contrary basis of sending defencive functions such as electricity and fault is simpler, practical; The more important thing is in two-supply circuit, to have added pre-charge circuit, when supplying power, can effectively reduce the impact of powered on moment like this system for the system that contains a large amount of energy-storage travelling wave tubes.The scheme of the utility model has not only solved high voltage converter effectively to its unit performance and the high request that is proposed that moves steady in a long-term thereof; Make it count for much applications more and more widely, and any double loop power supply switching and precharge occasion that powers on of needing all is suitable for the double loop power supply circuit that the utility model provides at electric power, metallurgy, oil, chemical industry etc.
The utility model is described according to specific embodiment, but it will be understood by those skilled in the art that when not breaking away from the utility model scope, can carry out various variations and be equal to replacement.In addition, for adapting to the specific occasion or the material of the utility model technology, can carry out many modifications and not break away from its protection range the utility model.Therefore, the utility model is not limited to specific embodiment disclosed herein, and comprises that all drop into the embodiment of claim protection range.
Claims (9)
1. the double loop power supply circuit with the pre-charging functions that powers on is characterized in that, comprising: the first power supply switch unit, second source switch unit, precharge control unit and precharge unit;
Said precharge control unit is connected to the second road power input with said first via power input through said precharge unit being unlocked and having the conducting when being in off-state of first via power supply input and said second source switch unit;
The said first power supply switch unit is connected to the double loop power supply circuit output end having the conducting when being in off-state of first via power supply input and said second source switch unit with said first via power input;
Said second source switch unit is connected to said double loop power supply circuit output end with said the second road power input through precharge unit being unlocked and the conducting when being in off-state of the said first power supply switch unit.
2. the double loop power supply circuit with the pre-charging functions that powers on according to claim 1 is characterized in that, said first via power input place is provided with electric power incoming line circuit breaker Q F1.
3. the double loop power supply circuit with the pre-charging functions that powers on according to claim 1; It is characterized in that; Said precharge unit comprises: be connected on the precharge control unit output and the A.C. contactor KM4 on the every phase circuit between the second road power input often open main contacts; On every phase circuit, be connected in parallel on the pre-charge resistance at said A.C. contactor KM4 two ends, and the end of incoming cables of often opening main contacts of said A.C. contactor KM4 and be connected on the first phase circuit and the second phase circuit between the coil, coil and the timing closing contact of time relay KT of A.C. contactor KM4.
4. the double loop power supply circuit with the pre-charging functions that powers on according to claim 3 is characterized in that:
The said first power supply switch unit comprise be connected on the A.C. contactor KM1 on every phase circuit between said first via power input and the said double loop power supply circuit output end often open main contacts, and the end of incoming cables of often opening main contacts of said A.C. contactor KM1 and be connected on the first phase circuit and the second phase circuit between coil and the normally closed auxilliary contact of A.C. contactor KM2 of A.C. contactor KM1;
Said second source switch unit comprise be connected on the electric power incoming line circuit breaker Q F2 on every phase circuit and A.C. contactor KM2 between said precharge unit and the said double loop power supply circuit output end successively often open main contacts, and the end of incoming cables of often opening main contacts of said A.C. contactor KM2 and be connected on the first phase circuit and the second phase circuit between coil and the normally closed auxilliary contact of A.C. contactor KM1 of A.C. contactor KM2.
5. the double loop power supply circuit with the pre-charging functions that powers on according to claim 4 is characterized in that:
The said first power supply switch unit also comprises the auxilliary contact of often opening of A.C. contactor KM1 and the first indicator light HL1; Said A.C. contactor KM1 often open auxilliary contact and first indicator light HL1 series connection after, be connected in parallel on the two ends of normally closed auxilliary contact of coil and the A.C. contactor KM2 of said A.C. contactor KM1;
Said second source switch unit also comprises the auxilliary contact of often opening of A.C. contactor KM2 and the second indicator light HL2; Said A.C. contactor KM2 often open auxilliary contact and second indicator light HL2 series connection after, be connected in parallel on the two ends of normally closed auxilliary contact of coil and the A.C. contactor KM1 of said A.C. contactor KM2.
6. the double loop power supply circuit with the pre-charging functions that powers on according to claim 4 is characterized in that:
The said first power supply switch unit also comprises in the end of incoming cables of often opening main contacts of said A.C. contactor KM1 and is connected on the coil of the auxiliary relay KA1 between the second phase circuit and the third phase circuit, and be connected on auxiliary relay KA1 between the normally closed auxilliary contact of coil and A.C. contactor KM2 of said A.C. contactor KM1 often open main contacts;
Said second source switch unit also comprises in the end of incoming cables of often opening main contacts of said A.C. contactor KM2 and is connected on the coil of the auxiliary relay KA2 between the second phase circuit and the third phase circuit, and be connected on auxiliary relay KA2 between the normally closed auxilliary contact of coil and A.C. contactor KM1 of said A.C. contactor KM2 often open main contacts.
7. the double loop power supply circuit with the pre-charging functions that powers on according to claim 6 is characterized in that:
The said first power supply switch unit also comprises with the coil of said auxiliary relay KA1 and is connected on the said second normally closed auxilliary contact of the auxiliary relay KA2 between circuit and the third phase circuit mutually together;
Said second source switch unit also comprises with the coil of said auxiliary relay KA2 and is connected on the said second normally closed auxilliary contact of the auxiliary relay KA1 between circuit and the third phase circuit mutually together.
8. according to any described double loop power supply circuit among the claim 4-7 with the pre-charging functions that powers on; It is characterized in that; What said precharge control unit comprised A.C. contactor KM3 on the every phase circuit that is connected between said first via power input and the said precharge unit often opens main contacts, and the end of incoming cables of often opening main contacts of said A.C. contactor KM3 and be connected on the first phase circuit and the second phase circuit between the normally closed auxilliary contact of coil, charge initiation button SBQ, charging stop button SBT, key button SA and electric power incoming line circuit breaker Q F2 of A.C. contactor KM3; And be connected in parallel on said charge initiation button SBQ two ends A.C. contactor KM3 often open auxilliary contact.
9. a high voltage converter is characterized in that, comprises any described double loop power supply circuit with the pre-charging functions that powers among the claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220086983 CN202586484U (en) | 2012-03-09 | 2012-03-09 | Double-circuit power supply circuit having precharge function during electrification and high-voltage frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220086983 CN202586484U (en) | 2012-03-09 | 2012-03-09 | Double-circuit power supply circuit having precharge function during electrification and high-voltage frequency converter |
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| Publication Number | Publication Date |
|---|---|
| CN202586484U true CN202586484U (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220086983 Expired - Fee Related CN202586484U (en) | 2012-03-09 | 2012-03-09 | Double-circuit power supply circuit having precharge function during electrification and high-voltage frequency converter |
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| CN (1) | CN202586484U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457451A (en) * | 2013-08-22 | 2013-12-18 | 深圳市英威腾电气股份有限公司 | High-voltage frequency converter low voltage power-on control circuit and control method thereof |
| CN104158282A (en) * | 2014-07-22 | 2014-11-19 | 苏州汇川技术有限公司 | Dual-circuit switching control power circuit and high-voltage inverter |
| CN109301899A (en) * | 2018-10-22 | 2019-02-01 | 郑州云海信息技术有限公司 | A kind of method, power supply, backup power source and power supply system controlling backup power source |
| CN110710081A (en) * | 2018-01-30 | 2020-01-17 | 株式会社Lg化学 | Pre-charge resistor protection device |
| CN112238763A (en) * | 2020-10-23 | 2021-01-19 | 中车株洲电力机车有限公司 | Pre-charging/charging circuit and control device and control method thereof |
| CN115765082A (en) * | 2022-11-15 | 2023-03-07 | 北京航天发射技术研究所 | Pre-charging control method and device for synchronous servo controller of special equipment |
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2012
- 2012-03-09 CN CN 201220086983 patent/CN202586484U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457451A (en) * | 2013-08-22 | 2013-12-18 | 深圳市英威腾电气股份有限公司 | High-voltage frequency converter low voltage power-on control circuit and control method thereof |
| CN103457451B (en) * | 2013-08-22 | 2016-12-28 | 深圳市英威腾电气股份有限公司 | A kind of high-voltage frequency converter low voltage electrifying control circuit and control method thereof |
| CN104158282A (en) * | 2014-07-22 | 2014-11-19 | 苏州汇川技术有限公司 | Dual-circuit switching control power circuit and high-voltage inverter |
| CN110710081A (en) * | 2018-01-30 | 2020-01-17 | 株式会社Lg化学 | Pre-charge resistor protection device |
| CN110710081B (en) * | 2018-01-30 | 2023-04-14 | 株式会社Lg新能源 | Pre-charge resistor protection apparatus |
| CN109301899A (en) * | 2018-10-22 | 2019-02-01 | 郑州云海信息技术有限公司 | A kind of method, power supply, backup power source and power supply system controlling backup power source |
| CN112238763A (en) * | 2020-10-23 | 2021-01-19 | 中车株洲电力机车有限公司 | Pre-charging/charging circuit and control device and control method thereof |
| CN112238763B (en) * | 2020-10-23 | 2022-05-13 | 中车株洲电力机车有限公司 | Charging circuit and control device and control method thereof |
| CN115765082A (en) * | 2022-11-15 | 2023-03-07 | 北京航天发射技术研究所 | Pre-charging control method and device for synchronous servo controller of special equipment |
| CN115765082B (en) * | 2022-11-15 | 2024-09-13 | 北京航天发射技术研究所 | Precharge control method and device for synchronous servo controller of special equipment |
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