Generator commutation control switch of generator car

Abstract

The utility model relates to a generator commutation control switch of a generator car, which belongs to the technical field of commutation switches and comprises a generator power supply end and a generator car power transmission end which are connected through an N-phase center line, an A-phase live wire, a B-phase live wire and a C-phase live wire. Phase-change control switches are arranged on the N-phase center line, the A-phase live wire, the B-phase live wire and the C-phase live wire; the commutation control switch comprises a plurality of relays and a plurality of state switches, and through logic integration of relay coils and contacts, contact switching of a B-phase live wire and a C-phase live wire is realized, so that commutation control and zero control of a generator of the generator car are realized; phase switching is completed through relay cooperative control and hardware logic, delay can be eliminated, redundancy can be provided, and the reliability of a power transmission line is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of commutation switch, concretely relates to a generator commutation control switch of power generation vehicle. BACKGROUND

[0002] With the development of power system, the stability and reliability of the power generation vehicle as an important equipment of emergency power supply or mobile power source are crucial. In the operation process of the power generation vehicle, the commutation control of the generator is the key link to ensure the matching of power output and load or power grid demand, and the existing commutation control logic still has defects, which cannot effectively ensure the continuity of power supply in the switching process. For example, when B phase and C phase are switched, if the control timing is improper, instantaneous voltage fluctuation or phase misplacement may be caused, thereby affecting the safe operation of the rear-end power consumption equipment, in addition, the high redundancy of circuit layout and large size also make it difficult to adapt to the actual needs of compact design of the power generation vehicle.

[0003] In the prior art, a commutation switch device with publication number CN202978720U is disclosed, which is connected between the power supply side three-phase circuit and the motor side three-phase circuit through the combination of the first contactor, the second contactor and the switch, realizes the rapid change of phase sequence, and can control the attraction of the first contactor or the second contactor by controlling the closing and opening of the switch, thereby changing the phase sequence of the power supply three-phase circuit. However, the commutation control of the device is simple, and the safety and reliability in the commutation process and the service life of the commutation switch cannot be guaranteed, and the timely zero position maintenance operation under any phase sequence cannot be met. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem of overcoming the defects in the prior art and providing a generator commutation control switch of power generation vehicle.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] The utility model discloses a power car generator commutation control switch, including generator power supply end and power car power transmission end, and is connected between the generator power supply end and power car power transmission end N phase center line, A phase fire line, B phase fire line and C phase fire line, be equipped with circuit breaker on A phase fire line, B phase fire line and C phase fire line, be equipped with N phase input, A phase input, B phase input and C phase input on the generator power supply end, be equipped with N phase output, A phase output, B phase output and C phase output on the power car power transmission end, be equipped with commutation control switch on N phase center line, A phase fire line, B phase fire line and C phase fire line, and commutation control switch includes normally open contact KA41, normally open contact KA42, normally open contact KA43, normally open contact KA44, normally open contact KA51, normally open contact KA52, normally open contact KA53 and normally open contact KA54, and one end of normally open contact KA41 is connected B phase input, and the other end is connected B phase output, and one end of normally open contact KA42 is connected C phase input, and the other end is connected C phase output, and one end of normally open contact KA43 is connected N phase input, and the other end is connected N phase output, and one end of normally open contact KA44 is connected A phase input, and the other end is connected A phase output, and one end of normally open contact KA51 is connected B phase input, and the other end is connected C phase output, and one end of normally open contact KA51 is connected C phase input, and the other end is connected B phase output, and one end of normally open contact KA53 is connected N phase input, and the other end is connected N phase output, and one end of normally open contact KA54 is connected A phase output, and the other end is connected A phase output.

[0007] The commutation control switch is a knob switch, comprising a power supply VCC, a state one switch S1, a state two switch S2, a relay KA1, a relay KA2, a relay KA3, a relay KA4 and a relay KA5.

[0008] The commutation control switch further comprises a state three zero switch.

[0009] The relay KA1 includes a coil L1, a normally open contact KA11 and a normally open contact KA12, the relay KA2 includes a coil L2 and a normally closed contact KA21, the relay KA3 includes a coil L3, a normally open contact KA31 and a normally closed contact KA32, the relay KA4 includes a coil L4, a normally open contact KA41, a normally open contact KA42, a normally open contact KA43 and a normally open contact KA44, the relay KA5 includes a coil L5, a normally open contact KA51, a normally open contact KA52, a normally open contact KA53 and a normally open contact KA54, one end of a state one switch S1 is connected with a power supply VCC, the other end is connected with one end of the coil L1 and one end of the normally open contact KA11, the other end of the coil L1 is grounded, one end of the normally open contact KA11 is connected with one end of the normally closed contact KA21, the other end of the normally closed contact KA21 is connected with the power supply VCC, one end of the normally open contact KA12 is connected with the power supply VCC, the other end is connected with one end of the coil L3, the other end of the coil L3 is grounded, one end of the normally open contact KA31 is connected with the power supply VCC, the other end is connected with one end of the coil L4, the other end of the coil L4 is grounded, one end of the normally closed contact KA32 is connected with the power supply VCC, the other end is connected with one end of the coil L5, the other end of the coil L5 is grounded, one end of a state two switch S2 is connected with the power supply VCC, the other end is connected with one end of the coil L2, the other end of the coil L2 is grounded.

[0010] The utility model has the following beneficial effects:

[0011] 1、The relay KA1, the relay KA2, the relay KA3, the relay KA4 and the relay KA5 cooperate and control the physical contact switching of B phase firewire and C phase firewire, directly complete phase switching through hardware logic, need not software calculation, eliminate processing delay completely, guarantee real -time performance.

[0012] 2, the normally open contact KA41 and the normally open contact KA42 are connected with the original phase, the normally open contact KA51 and the normally open contact KA52 are connected with the cross phase change, provide redundant contact, improve the reliability of transmission line.

[0013] 3, through relay coil and contact logic integration, simplify external circuit complexity, can adapt to the application scene of the space limited of generating car.

[0014] 4, the power supply VCC drives the relay coil unification, and forms complete loop through the grounding terminal, ensure that the control signal transmission reliability, avoid the failure of commutation due to power fluctuation.

[0015] 5, the state three zero switch makes direct zero adjustment in any phase sequence state to facilitate the operation of maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is the utility model constitution schematic diagram.

[0017] Fig. 2 The electrical principle diagram of the utility model. DETAILED DESCRIPTION

[0018] As Figs. 1-2 shown, the power car generator commutation control switch of the utility model, including generator power supply end and power car power transmission end, the connection between generator power supply end and power car power transmission end N phase center line, A phase fire line, B phase fire line and C phase fire line, be equipped with circuit breaker on A phase fire line, B phase fire line and C phase fire line, be equipped with N phase input end, A phase input end, B phase input end and C phase input end on generator power supply end, be equipped with N phase output end, A phase output end, B phase output end and C phase output end on power car power transmission end, be equipped with commutation control switch on N phase center line, A phase fire line, B phase fire line and C phase fire line, commutation control switch includes normally open contact KA41, normally open contact KA42, normally open contact KA43, normally open contact KA44, normally open contact KA51, normally open contact KA52, normally open contact KA53 and normally open contact KA54, normally open contact KA41 one end is connected B phase input end, the other end is connected B phase output end, normally open contact KA42 one end is connected C phase input end, the other end is connected C phase output end, normally open contact KA43 one end is connected N phase input end, the other end is connected N phase output end, normally open contact KA44 one end is connected A phase input end, the other end is connected A phase output end, normally open contact KA51 one end is connected B phase input end, the other end is connected C phase output end, normally open contact KA51 one end is connected C phase input end, the other end is connected B phase output end, normally open contact KA53 one end is connected N phase input end, the other end is connected N phase output end, normally open contact KA54 one end is connected A phase output end, the other end is connected A phase output end.

[0019] The commutation control switch is knob switch, including power supply VCC, state one switch S1, state two switch S2, relay KA1, relay KA2, relay KA3, relay KA4 and relay KA5.

[0020] The commutation control switch further includes state three zero position switch.

[0021] The relay KA1 includes a coil L1, a normally open contact KA11 and a normally open contact KA12, the relay KA2 includes a coil L2 and a normally closed contact KA21, the relay KA3 includes a coil L3, a normally open contact KA31 and a normally closed contact KA32, the relay KA4 includes a coil L4, a normally open contact KA41, a normally open contact KA42, a normally open contact KA43 and a normally open contact KA44, and the relay KA5 includes a coil L5, a normally open contact KA51, a normally open contact KA52, a normally open contact KA53 and a normally open contact KA54; one end of the state one switch S1 is connected to the power supply VCC, and the other end is connected to one end of the coil L1 and one end of the normally open contact KA11 respectively, the other end of the coil L1 is grounded, and the other end of the normally open contact KA11 is connected to one end of the normally closed contact KA21, and the other end of the normally closed contact KA21 is connected to the power supply VCC; one end of the normally open contact KA12 is connected to the power supply VCC, and the other end is connected to one end of the coil L3, the other end of the coil L3 is grounded, one end of the normally open contact KA31 is connected to the power supply VCC, and the other end is connected to one end of the coil L4, the other end of the coil L4 is grounded, one end of the normally closed contact KA32 is connected to the power supply VCC, and the other end is connected to one end of the coil L5, and the other end of the coil L5 is grounded; one end of the state two switch S2 is connected to the power supply VCC, and the other end is connected to one end of the coil L2, and the other end of the coil L2 is grounded.

[0022] Specifically, when the original phase power supply is adopted, the state one switch S1 is pressed, the coil L1 in the relay KA1 is powered to make the normally open contact KA11 and the normally open contact KA12 both closed, the normally open contact KA12 is closed to make the coil L3 in the relay KA3 powered, the coil L3 is powered to make the normally open contact KA31 closed and the normally closed contact KA32 disconnected, the normally open contact KA31 is closed to make the coil L4 in the relay KA4 powered, the coil L4 is powered to make the normally open contact KA41, the normally open contact KA42, the normally open contact KA3 and the normally open contact KA44 all closed, then the N phase input end and the N phase output end form a path, the A phase input end and the A phase output end form a path, the B phase input end and the B phase output end form a path, and the C phase input end and the C phase output end form a path, thereby realizing the original phase power supply.

[0023] Specifically, after the commutation control switch is rotated to the state one switch S1, the state one switch S1 will automatically rebound, at this time, the coil L1 in the relay KA1 has been powered, and the normally open contact KA11 has been closed, one end of the normally closed contact KA21 in the relay KA2 is connected to the power supply VCC, and the other end is connected to the closed normally open contact KA11, the normally open contact KA11 is connected to the coil L1, and the other end of the coil L1 is grounded, at this time, the power supply VCC, the normally closed contact KA21, the closed normally open contact KA11 and the coil L1 form a complete loop, and the coil L1 forms a power-on self-locking.

[0024] Specifically, when the phase change power supply is adopted, the phase change control switch is rotated to the state two switch S2, at this time the coil L2 in the relay KA2 is powered to make the normally closed contact KA21 open, at this time the self-locking loop formed by the power supply VCC, the normally closed contact KA21, the closed normally open contact KA11 and the coil L1 is open, the coil L1 in the relay KA1 is powered to make the normally open contact KA11 and the normally open contact KA12 which have been closed return to the open state, the normally open contact KA12 which has been closed returns to the open state to make the coil L3 lose power, the coil L3 loses power to make the normally open contact KA31 which has been closed return to the open state, the normally closed contact KA32 which has been opened returns to the closed state, the normally closed contact KA32 returns to the closed state to make the coil L5 in the relay KA5 powered, the coil L5 is powered to make the normally open contact KA51, the normally open contact KA52, the normally open contact KA53 and the normally open contact KA54 all closed, then the B phase input end and the C phase output end form a path, the C phase input end and the B phase output end form a path, and the phase change power supply is realized.

[0025] Specifically, when the cable head needs to be replaced or other maintenance operations are needed, the phase change control switch is rotated to the state three zero switch, at this time no matter the original phase state or the phase change state, the generator power supply end and the generator car power supply end cannot form a path, so that the cable head replacement or other maintenance operations can be carried out.

Claims

1. A generator phase commutation control switch for a generator vehicle, comprising a generator power supply terminal and a generator vehicle transmission terminal, wherein the generator power supply terminal and the generator vehicle transmission terminal are connected by an N-phase center line, an A-phase live wire, a B-phase live wire, and a C-phase live wire, and circuit breakers are provided on the A-phase live wire, the B-phase live wire, and the C-phase live wire, characterized in that, The generator power supply terminal is equipped with an N-phase input terminal, an A-phase input terminal, a B-phase input terminal, and a C-phase input terminal. The generator transmission terminal is equipped with an N-phase output terminal, an A-phase output terminal, a B-phase output terminal, and a C-phase output terminal. A phase-switching control switch is installed on the N-phase center line, A-phase live wire, B-phase live wire, and C-phase live wire. The phase-switching control switch includes normally open contacts KA41, KA42, KA43, KA44, KA51, KA52, KA53, and KA54. One end of the normally open contact KA41 is connected to the B-phase input terminal, and the other end is connected to the B-phase output terminal. One end of normally open contact KA42 is connected to the C-phase input terminal, and the other end is connected to the C-phase output terminal. One end of normally open contact KA43 is connected to the N-phase input terminal, and the other end is connected to the N-phase output terminal. One end of normally open contact KA44 is connected to the A-phase input terminal, and the other end is connected to the A-phase output terminal. One end of normally open contact KA51 is connected to the B-phase input terminal, and the other end is connected to the C-phase output terminal. One end of normally open contact KA51 is connected to the C-phase input terminal, and the other end is connected to the B-phase output terminal. One end of normally open contact KA53 is connected to the N-phase input terminal, and the other end is connected to the N-phase output terminal. One end of normally open contact KA54 is connected to the A-phase output terminal, and the other end is connected to the A-phase output terminal.

2. The generator commutation control switch for the generator car according to claim 1, characterized in that, The phase-commutation control switch is a rotary switch, including power supply VCC, state one switch S1, state two switch S2, relay KA1, relay KA2, relay KA3, relay KA4 and relay KA5.

3. The generator commutation control switch for the generator car according to claim 1, characterized in that, The commutation control switch also includes a state three zero-position switch.

4. The generator commutation control switch for the generator car according to claim 2, characterized in that, The relay KA1 includes a coil L1, a normally open contact KA11, and a normally open contact KA12; the relay KA2 includes a coil L2 and a normally closed contact KA21; the relay KA3 includes a coil L3, a normally open contact KA31, and a normally closed contact KA32; the relay KA4 includes a coil L4, normally open contacts KA41, KA42, KA43, and KA44; and the relay KA5 includes a coil L5, normally open contacts KA51, KA52, KA53, and KA54. One end of the state-one switch S1 is connected to the power supply VCC, and the other end is connected to one end of the coil L1 and one end of the normally open contact KA11. One end of the normally open contact KA11 is grounded; the other end of the normally open contact KA11 is connected to one end of the normally closed contact KA21, and the other end of the normally closed contact KA21 is connected to the power supply VCC; one end of the normally open contact KA12 is connected to the power supply VCC, and the other end is connected to one end of the coil L3, and the other end of the coil L3 is grounded; one end of the normally open contact KA31 is connected to the power supply VCC, and the other end is connected to one end of the coil L4, and the other end of the coil L4 is grounded; one end of the normally closed contact KA32 is connected to the power supply VCC, and the other end is connected to one end of the coil L5, and the other end of the coil L5 is grounded; one end of the state two switch S2 is connected to the power supply VCC, and the other end is connected to one end of the coil L2, and the other end of the coil L2 is grounded.

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