CN211063540U - Energy-saving soft start cabinet - Google Patents
Energy-saving soft start cabinet Download PDFInfo
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- CN211063540U CN211063540U CN201921191738.5U CN201921191738U CN211063540U CN 211063540 U CN211063540 U CN 211063540U CN 201921191738 U CN201921191738 U CN 201921191738U CN 211063540 U CN211063540 U CN 211063540U
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model provides an energy-saving soft start cabinet; the soft start circuit comprises a plurality of motors, a soft start circuit, a power supply circuit and an energy-saving circuit, the soft start circuit can improve the starting performance of the motors, only one soft start device is used for realizing soft start of a plurality of devices, and the device investment and the using area of a power distribution room are effectively reduced; in the use the utility model discloses can control the motor and start one by one, realize the shutting from the technique, avoid many motors to start the impact that causes power transformer simultaneously, can also effectively reduce the total current that the motor acquireed from the electric wire netting through energy-conserving circuit, improve the power factor of motor, the reduce system loss reduces cable cross-section and cable, power transformer temperature rise, reduces power transformer capacity to reduce the basic charges of electricity of enterprise, reach energy saving and consumption reduction's purpose.
Description
Technical Field
The utility model relates to an energy-conserving soft start cabinet.
Background
The direct start of a lot of motors that have now, star triangle start and self coupling decompression start cabinet all can't start, and current a lot of adoption soft starter starts, and every motor all uses a soft starter, and equipment manufacturing cost increases, and the initial stage drops into great to an equipment is equipped with a start cabinet, and the enterprise that equipment is many will have many start cabinets to occupy the distribution room area of enterprise greatly.
The existing reactive in-situ compensation device is directly connected to a motor wiring terminal, and is simultaneously put into operation and quit operation. When the motor is out of operation, the motor can continue to rotate due to certain inertia of the rotation of the motor, the compensation capacitor discharges through the motor winding at the moment, the impedance of the motor winding is very low, the discharge current is large, the discharge current is introduced into the winding, which is equivalent to exciting the motor, the motor is equivalent to a generator, the overlarge excitation current enables the motor to instantaneously generate very high voltage, and if the high voltage exceeds the withstand voltage of the motor, the system insulation can be broken down, so that accidents are caused.
For example, a double-speed motor soft starter with the publication number of CN104362905A, a power supply is connected with a soft starter, the soft starter is connected with a motor through a power supply line containing a contactor KM1, a star connection method is formed between the soft starter and the motor through a line containing a contactor KM3 and the power supply line, and a triangle connection method is formed between the soft starter and the motor through the line containing a contactor KM2 and the power supply line. The utility model has two start-stop command terminals, respectively controls the high-speed and low-speed states of a motor, does not need a complex secondary wiring loop, is completely controlled by a program, and is safe and reliable; the program has two sets of different setting parameters which respectively correspond to the high-speed state and the low-speed state of a motor, can realize the starting and stopping of motors with different powers, and can respectively realize the soft stop function of the motors. However, the soft starter and the motor are protected by a fuse, the motor cannot be controlled to be started gradually, and a large load is brought to a power circuit in the process of simultaneously starting a plurality of motors, so that the power circuit is damaged.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an energy-conserving soft start cabinet.
The utility model discloses a following technical scheme can realize.
The utility model provides an energy-saving soft start cabinet; including a plurality of motors and soft start circuit, power supply circuit, energy-conserving circuit passes through the contactor and is connected with the three binding post of motor, soft start circuit is connected with the motor respectively through a plurality of starting contactor, the power supply circuit both ends are connected with three phase current's three phase conductor and motor respectively, and the motor protector suit is on three power cords of motor.
The energy-saving circuit comprises a compensation capacitor, three public ends of the compensation capacitor are respectively connected with a compensation contactor, the compensation contactor is connected with three wiring terminals of the motor, and the three public ends of the compensation capacitor are respectively connected with a current-limiting resistor and then connected with a grounding wiring terminal through a piezoresistor.
The power supply circuit comprises circuit breakers and switch contactors corresponding to the number of the motors, the wire inlet ends of the circuit breakers are connected with three phase wires of the three-phase power supply, the wire outlet ends of the circuit breakers are connected with three normally open contacts of the switch contactors, and the three normally open contacts of the switch contactors are connected with the motors.
The soft starting circuit comprises a soft starter, wherein the wire inlet end of the soft starter is connected with three phase wires of a three-phase power supply, the wire outlet end of the soft starter is respectively connected with three normally open contacts of a plurality of starting contactors, and the three normally open contacts of the starting contactors are connected with the motor.
Still be connected with control circuit on power supply circuit and the soft start circuit, control circuit includes a plurality of branch circuits and indicating circuit that correspond respectively with the motor, control circuit's one end is connected with arbitrary phase line behind the circuit breaker before the soft starter, and control circuit's the other end is connected on another phase line or zero line circuit.
The branch circuit comprises a starting branch circuit, the starting branch circuit is sequentially connected with a starting button, a first normally closed contact of a contactor of the branch circuit corresponding to the motor, a first normally closed contact of the starting contactor of other motors and a starting contactor coil of the branch circuit corresponding to the motor from the phase line to the other phase line or zero line, the first normally open contact of the starting contactor of the branch circuit corresponding to the motor is connected with two ends of the starting button in parallel, the first normally open contact of the starting contactor of the branch circuit corresponding to the motor is also connected with a time relay coil, and the time relay coil is connected with the other phase line or zero line of the circuit;
the branch road is still including stopping the branch road, it is extremely from this phase line to stop the branch road the direction of another phase line or zero line has connected gradually stop button, time relay normally open auxiliary contact, motor protector normally closed contact, branch road correspond the switch contactor coil of motor, time relay normally open auxiliary contact both ends are parallelly connected with a normally open contact of the switch contactor that this phase line motor corresponds, and another phase line or zero line circuit is inserted to a normally open contact of this switch contactor and this motor protector coil and the parallel line connection back of the compensation contactor coil of being connected with this motor.
The indication branch circuit comprises a stop indication branch circuit and an operation indication branch circuit, the stop indication branch circuit is connected with the contactor auxiliary normally closed contact and the indication lamp corresponding to the motor of the branch circuit in sequence from the phase line to the direction of the other phase line or the zero line, and the operation indication branch circuit is connected with the contactor auxiliary normally open contact and the indication lamp corresponding to the motor of the branch circuit in sequence from the phase line to the direction of the other phase line or the zero line.
The starting port of the soft starter is connected with the normally open contacts of all the starting contactors in parallel, and the stopping port of the soft starter is connected with the normally closed contacts of all the starting contactors in series
The beneficial effects of the utility model reside in that:
⑴ can improve the electric starting performance, some starting modes such as direct starting, star-delta starting and self-coupling decompression starting cabinet starting inconvenient equipment, soft starting can be convenient, and the soft starting is a renewal product of the starting equipment;
⑵ the equipment investment is effectively reduced, the cost of the soft starter is relatively high, each motor uses one soft starter, the equipment manufacturing cost is increased, the initial investment is large, the utility model discloses only use one soft starter to make many equipment realize soft start, one soft start equipment can replace many soft start equipment, can obviously reduce the equipment investment;
⑶ it can effectively reduce the area of the distribution room, one device is equipped with one starting cabinet, the enterprise with more devices will have many starting cabinets, after the utility model is used, one starting cabinet can be used to replace many starting cabinets, especially the enterprise implementing technical transformation can withdraw the original many eliminated devices, only one cabinet of the utility model can realize the purpose of starting many devices;
⑷, the utility model can only start the motors controlled by the product one by one in the using process, the last one finishes the starting process, and after entering the normal running state, the next motor can be started, the locking is realized technically, the impact on the power transformer caused by the simultaneous starting of multiple motors is avoided, the capacity of the power transformer can be effectively reduced, thereby the basic electric charge of enterprises is reduced, and the purposes of energy saving and consumption reduction are achieved;
⑸ the utility model discloses still have energy saving and consumption reduction circuit, can effectively reduce the total current that the motor obtained from the electric wire netting, improve the power factor of motor, reduce the system loss, reduce cable cross-section and cable, power transformer temperature rise, reduce power transformer capacity to reduce the basic charges of electricity of enterprise, reach energy saving and consumption reduction's purpose.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention;
FIG. 2 is a schematic diagram of a control loop of the present invention;
fig. 3 is the wiring diagram of the soft starter of the utility model.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
An energy-saving soft start cabinet; including a plurality of motors and soft start circuit, power supply circuit, energy-conserving circuit passes through the contactor and is connected with the three binding post of motor, soft start circuit is connected with the motor respectively through a plurality of starting contactor, the power supply circuit both ends are connected with three phase current's three phase conductor and motor respectively, and the motor protector suit is on three power cords of motor.
The energy-saving circuit comprises a compensation capacitor, three public ends of the compensation capacitor are respectively connected with a compensation contactor, the compensation contactor is connected with three wiring terminals of the motor, and the three public ends of the compensation capacitor are connected with a current-limiting resistor and then connected with a grounding wiring terminal through a piezoresistor.
The power supply circuit comprises circuit breakers and switch contactors corresponding to the number of the motors, the wire inlet ends of the circuit breakers are connected with three phase wires of the three-phase power supply, the wire outlet ends of the circuit breakers are connected with three normally open contacts of the switch contactors, and the three normally open contacts of the switch contactors are connected with the motors.
The soft starting circuit comprises a soft starter, wherein the wire inlet end of the soft starter is connected with three phase wires of a three-phase power supply, the wire outlet end of the soft starter is respectively connected with three normally open contacts of a plurality of starting contactors, and the three normally open contacts of the starting contactors are connected with the motor.
Still be connected with control circuit on power supply circuit and the soft start circuit, control circuit includes a plurality of branch circuits and indicating circuit that correspond respectively with the motor, control circuit's one end is connected with arbitrary phase line behind the circuit breaker before the soft starter, and control circuit's the other end is connected on another phase line or zero line circuit.
The branch circuit comprises a starting branch circuit, the starting branch circuit is sequentially connected with a starting button, a first normally closed contact of a contactor of the branch circuit corresponding to the motor, a first normally closed contact of the starting contactor of other motors and a starting contactor coil of the branch circuit corresponding to the motor from the phase line to the other phase line or zero line, the first normally open contact of the starting contactor of the branch circuit corresponding to the motor is connected with two ends of the starting button in parallel, the first normally open contact of the starting contactor of the branch circuit corresponding to the motor is also connected with a time relay coil, and the time relay coil is connected with the other phase line or zero line of the circuit;
the branch road is still including stopping the branch road, it is extremely from this phase line to stop the branch road the direction of another phase line or zero line has connected gradually stop button, time relay normally open auxiliary contact, motor protector normally closed contact, branch road correspond the switch contactor coil of motor, time relay normally open auxiliary contact both ends are parallelly connected with a normally open contact of the switch contactor that this phase line motor corresponds, and another phase line or zero line circuit is inserted to a normally open contact of this switch contactor and this motor protector coil and the parallel line connection back of the compensation contactor coil of being connected with this motor.
The indication branch circuit comprises a stop indication branch circuit and an operation indication branch circuit, the stop indication branch circuit is connected with the contactor auxiliary normally closed contact and the indication lamp corresponding to the motor of the branch circuit in sequence from the phase line to the direction of the other phase line or the zero line, and the operation indication branch circuit is connected with the contactor auxiliary normally open contact and the indication lamp corresponding to the motor of the branch circuit in sequence from the phase line to the direction of the other phase line or the zero line.
The starting port of the soft starter is connected with the normally open contacts of all the starting contactors in parallel, and the stopping port of the soft starter is connected with the normally closed contacts of all the starting contactors in series
Example (b):
as shown in fig. 1, 2 and 3, the utility model is arranged in a soft starter to start three motors
1 starting motor M1
⑴ signal light H L1 is bright, M1 can be started, and breakers QF1 and QF2 are closed;
⑵ pressing a start button SB1, the electricity attraction of the coil KM4 in fig. 2, the closing of the main contact KM4 in fig. 1, the attraction of the normally open auxiliary contact KM4 in fig. 3, the soft start entering the start state, the power on starting of the motor M1, the self-protection of the closing of the normally open auxiliary contact KM4 in fig. 2, and the simultaneous power on of the coil time relay 1 to start the timing KT;
⑶ the starting process of the soft starter is finished, the motor M1 enters a normal running state, the time relay KT1 is set to the time, the normally open auxiliary contact is closed, the coil of the contactor KM1 is electrified and attracted, the normally closed auxiliary contact in figure 2 is disconnected, the coil of the contactor KM4 is electrified, the main contact of KM4 is disconnected, the main contact of KM1 is closed, the soft starter bypasses, meanwhile, the normally closed auxiliary contact of KM4 in figure 3 is disconnected, the soft starter stops running, the normally open auxiliary contact of KM1 in figure 2 is self-protected, the motor comprehensive protector FM1 is electrified and starts working, and the motor M1 is protected from accidents caused by overload, phase loss, short circuit, grounding and the like;
⑷, a contactor KM5 of a motor M2 and a contactor KM6 of a motor M3 are connected in series into a starting loop of a motor M1, when the motor M1 is started, if the motors M2 and M3 are also started, auxiliary contacts KM5 and KM6 connected in series in a starting loop of a motor M1 are disconnected, the KM4 cannot be started, and the M1 cannot be started, so that the condition that a plurality of motors cannot be started simultaneously is ensured.
⑸, the main contact of KM7 is closed, the energy-saving circuit is put into operation, the corresponding indicator light is on, and the signal light H L2 is always on.
⑹ A stop button SB2 is pressed, the coil of the contactor KM1 is de-energized, the motor M1 stops running, and the signal lamp H L1 is normally on.
2 starting motor M2
⑴ signal light H L3 is bright, M2 can be started, and breakers QF2 and QF3 are closed;
⑵ pressing a start button SB3, the electricity attraction of the coil KM5 in fig. 2, the closing of the main contact KM5 in fig. 1, the attraction of the normally open auxiliary contact KM5 in fig. 3, the soft start entering the start state, the power on starting of the motor M2, the self-protection of the closing of the normally open auxiliary contact KM5 in fig. 2, and the simultaneous power on of the coil time relay 2 to start the timing KT;
⑶ the starting process of the soft starter is finished, the motor M2 enters a normal running state, the time relay KT2 is set to the time, the normally open auxiliary contact is closed, the coil of the contactor KM2 is electrified and attracted, the normally closed auxiliary contact in figure 2 is disconnected, the coil of the contactor KM5 is electrified, the main contact of KM5 is disconnected, the main contact of KM2 is closed, the soft starter bypasses, meanwhile, the normally closed auxiliary contact of KM5 in figure 3 is disconnected, the soft starter stops running, the normally open auxiliary contact of KM2 in figure 2 is self-protected, the motor comprehensive protector FM2 is electrified and starts working, and the motor M2 is protected from accidents caused by overload, phase loss, short circuit, grounding and the like;
⑷, a contactor KM4 of a motor M1 and a contactor KM6 of a motor M3 are connected in series into a starting loop of a motor M2, when the motor M2 is started, if the motors M1 and M3 are also started, auxiliary contacts KM4 and KM6 connected in series in a starting loop of a motor M2 are disconnected, the KM5 cannot be started, and the M2 cannot be started, so that the condition that a plurality of motors cannot be started simultaneously is ensured.
⑸, the main contact of KM8 is closed, the energy-saving circuit is put into operation, the corresponding indicator light is on, and the signal light H L4 is always on.
⑹ pressing stop button SB4, contactor KM2 coil losing power, motor M2 stop running, signal light H L3 is normally on.
3 starting motor M3
⑴ signal light H L5 is bright, M3 can be started, and breakers QF2 and QF4 are closed;
⑵ pressing a start button SB5, the electricity attraction of the coil KM6 in fig. 2, the closing of the main contact KM6 in fig. 1, the attraction of the normally open auxiliary contact KM6 in fig. 3, the soft start entering the start state, the power on starting of the motor M3, the self-protection of the closing of the normally open auxiliary contact KM6 in fig. 2, and the simultaneous power on of the coil time relay 3 to start the timing KT;
⑶ the starting process of the soft starter is finished, the motor M3 enters a normal running state, the time relay KT3 is set to the time, the normally open auxiliary contact is closed, the coil of the contactor KM3 is electrified and attracted, the normally closed auxiliary contact in figure 2 is disconnected, the coil of the contactor KM6 is electrified, the main contact of KM6 is disconnected, the main contact of KM3 is closed, the soft starter bypasses, meanwhile, the normally closed auxiliary contact of KM6 in figure 3 is disconnected, the soft starter stops running, the normally open auxiliary contact of KM3 in figure 2 is self-protected, the motor comprehensive protector FM3 is electrified and starts working, and the motor M3 is protected from accidents caused by overload, phase loss, short circuit, grounding and the like;
⑷, a contactor KM4 of a motor M1 and a contactor KM5 of a motor M2 are connected in series into a starting loop of a motor M3, when the motor M3 is started, if the motors M1 and M2 are also started, auxiliary contacts KM4 and KM5 connected in series in a starting loop of a motor M3 are disconnected, the KM6 cannot be started, and the M3 cannot be started, so that the condition that a plurality of motors cannot be started simultaneously is ensured.
⑸, the main contact of KM9 is closed, the energy-saving circuit is put into operation, the corresponding indicator light is on, and the signal light H L6 is always on.
⑹ pressing stop button SB6, contactor KM3 coil losing power, motor M3 stop running, signal light H L5 is normally on.
The determination of the compensation capacity is generally calculated and determined according to the motor capacity and the power factor after compensation before compensation, or calculated and determined according to the motor capacity, the pole number and the magnitude of no-load current, which is often inconsistent with the actual situation. In fact, different manufacturers of motors have certain differences in no-load current, rated current, starting equipment current and the like, and one motor has different starting equipment current, active power, reactive power, apparent power and other parameters without a production machine or with a belt pulley removed, with a belt pulley in no-load starting equipment and with production equipment in no-load starting equipment. The best method is that aiming at a certain motor, the no-load starting equipment of the production equipment is carried, electric parameters such as current, active power, reactive power, apparent power and the like of the starting equipment are actually measured, the capacity of the compensating power capacitor is determined based on the actually measured reactive power, and therefore the capacity is matched with the actual situation, and the risk can be guaranteed not to occur when the capacitor is operated.
The piezoresistor is configured to safely operate within 1.3-1.5 times of system voltage, and is conducted within the voltage range close to or lower than withstand voltage test voltages of a motor, a power capacitor and the like.
The voltage withstanding value of the power capacitor is not less than 1.1-1.3 times of the system voltage.
Claims (9)
1. The utility model provides an energy-conserving soft start cabinet which characterized in that: including a plurality of motors and soft start circuit, power supply circuit, energy-conserving circuit passes through the contactor and is connected with the three binding post of motor, soft start circuit is connected with the motor respectively through a plurality of starting contactor, the power supply circuit both ends are connected with three phase current's three phase conductor and motor respectively, and the motor protector suit is on three power cords of motor.
2. The energy saving soft start cabinet of claim 1, wherein: the energy-saving circuit comprises a compensation capacitor, three public ends of the compensation capacitor are respectively connected with a compensation contactor, the compensation contactor is connected with three wiring terminals of the motor, and the three public ends of the compensation capacitor are respectively connected with a current-limiting resistor and then connected with a grounding wiring terminal through a piezoresistor.
3. The energy saving soft start cabinet of claim 1, wherein: the power supply circuit comprises circuit breakers and switch contactors corresponding to the number of the motors, the wire inlet ends of the circuit breakers are connected with three phase wires of the three-phase power supply, the wire outlet ends of the circuit breakers are connected with three normally open contacts of the switch contactors, and the three normally open contacts of the switch contactors are connected with the motors.
4. The energy saving soft start cabinet of claim 1, wherein: the soft starting circuit comprises a soft starter, wherein the wire inlet end of the soft starter is connected with three phase wires of a three-phase power supply, the wire outlet end of the soft starter is respectively connected with three normally open contacts of a plurality of starting contactors, and the three normally open contacts of the starting contactors are connected with the motor.
5. The energy saving soft start cabinet of claim 1, wherein: still be connected with control circuit on power supply circuit and the soft start circuit, control circuit includes a plurality of branch circuits and indicating circuit that correspond respectively with the motor, control circuit's one end is connected with arbitrary phase line behind the circuit breaker before the soft starter, and control circuit's the other end is connected on another phase line or zero line circuit.
6. The energy saving soft start cabinet of claim 5, wherein: the branch road is including starting the branch road, any phase line that starts the branch road extremely the direction of another phase line or zero line has connected gradually start button, the branch road corresponds the first normally closed contact of contactor of motor, corresponds the start contactor coil of motor with the first normally closed contact of start contactor of other motors, the branch road corresponds the first normally open contact of start contactor of motor and connects in parallel at the start button both ends, the branch road corresponds the first normally open contact of start contactor of motor and still is connected with a time relay coil, time relay coil is connected with another phase line or zero line of circuit.
7. The energy saving soft start cabinet of claim 5, wherein: the branch road is still including stopping the branch road, stop any phase line on branch road extremely the direction of another phase line or zero line has connected gradually stop button, time relay normally open auxiliary contact, motor protector normally closed contact, branch road correspond the switch contactor coil of motor, time relay normally open auxiliary contact both ends are parallelly connected with the branch road corresponds a normally open contact of the switch contactor that the motor corresponds, and another phase line or zero line circuit is inserted to this switch contactor's a normally open contact and this motor protector coil and the parallel line connection back of the compensation contactor coil of being connected with this motor.
8. The energy saving soft start cabinet of claim 5, wherein: the indicating circuit all indicates the branch road including stopping to indicate and the operation indicates the branch road, stop to indicate arbitrary phase line of branch road extremely the direction of another phase line or zero line connects gradually the supplementary normally closed contact of contactor and the pilot lamp that this branch road corresponds the motor and corresponds, the operation indicates the branch road from arbitrary phase line extremely the direction of another phase line or zero line connects gradually the supplementary normally open contact of contactor and the pilot lamp that correspond the motor with this branch road and correspond.
9. The energy saving soft start cabinet of claim 4, wherein: the starting ports of the soft starter are connected with the normally open contacts of all the starting contactors in parallel, and the stopping ports of the soft starter are connected with the normally closed contacts of all the starting contactors in series.
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| CN201921191738.5U CN211063540U (en) | 2019-07-26 | 2019-07-26 | Energy-saving soft start cabinet |
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| CN201921191738.5U CN211063540U (en) | 2019-07-26 | 2019-07-26 | Energy-saving soft start cabinet |
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| CN211063540U true CN211063540U (en) | 2020-07-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380649A (en) * | 2019-07-26 | 2019-10-25 | 六盘水金星机电设备有限公司 | A kind of energy-saving soft start cabinet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380649A (en) * | 2019-07-26 | 2019-10-25 | 六盘水金星机电设备有限公司 | A kind of energy-saving soft start cabinet |
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