CN208369493U - A kind of central air-conditioning double speed or multispeed electric machine drive system - Google Patents
A kind of central air-conditioning double speed or multispeed electric machine drive system Download PDFInfo
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- CN208369493U CN208369493U CN201820746840.6U CN201820746840U CN208369493U CN 208369493 U CN208369493 U CN 208369493U CN 201820746840 U CN201820746840 U CN 201820746840U CN 208369493 U CN208369493 U CN 208369493U
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Abstract
The utility model discloses a kind of central air-conditioning double speed or multispeed electric machine drive systems, including controller, soft activator power control cabinet；Controller is connect with soft activator power control cabinet；Further include invariable frequency compressor, includes at least one set of high speed winding and at least one set of low speed winding in invariable frequency compressor；One high speed soft activator and a low speed soft activator and at least one breaker are set in the soft activator power control cabinet；Controller in soft activator power control cabinet low speed soft activator and high speed soft activator be separately connected；The connection of the high speed winding of high speed soft activator and invariable frequency compressor；The connection of the low speed winding of low speed soft activator and invariable frequency compressor.It realizes double speed (multi-speed) motor frequent starting and operation, stronger safeguard protection and excellent start up curve, has the ability for inhibiting starting current peak value.
Description
Technical field
The utility model belongs to central air-conditioning dynamic Control technical field, and in particular to a kind of double speed of central air-conditioning or
Multispeed electric machine drive system and method.
Background technique
In industrial application, often needing to a motor can be run with double speed (multi-speed), and double speed (multi-speed) refers both to velocity transformation
Differentiation of the gear such as high speed, low speed or middling speed.Common double speed (multi-speed) electric motor starting and operation means have contactor driving, become
The driving of frequency device, soft activator driving.And contactor driving realizes that motor star triangle start and high low speed switch this scheme starting
There is secondary current impact in the process, at high cost, structure is complicated, high failure rate；And transducer drive realizes electric motor starting and height
It is impacted although speed switches in this scheme start-up course without secondary current, and starting current is small, starting is smooth, program cost
It is too high；Soft activator driving realizes that soft starter for motor and high low speed switch this scheme, and at low cost, structure is simple, starts nothing
It impacts and is used widely.
Traditional soft activator drive scheme is usually to use a soft activator, is reconfigured two (multiple) contactors,
When starting, it is first closed a contactor, restarts soft activator, when stopping first stopping soft activator releasing contactor again.Due to soft
Starter requires the number of starts in unit hour, if the frequent program of the site requirement number of starts be likely to result in it is soft
Starter damage, current requirements are big when soft activator drives high speed, require electric current small when driving low speed, start-up parameter and starting limit
Stream is all different, and Protection parameters are also different, and soft activator can not reliably protect motor, and control start up curve.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of central air-conditioning with double for the frequent scene of starting
Speed or multispeed electric machine drive system and method realize double speed (multi-speed) motor frequent starting and operation, stronger safeguard protection and excellent
Good start up curve has the ability for inhibiting starting current peak value.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
A kind of central air-conditioning double speed or multispeed electric machine drive system, including controller, soft activator power control cabinet；Controller
It is connect with soft activator power control cabinet；It include at least one set of high speed in invariable frequency compressor it is characterized by also including invariable frequency compressor
Winding and at least one set of low speed winding；One high speed soft activator is set in the soft activator power control cabinet and a low speed is soft opens
Dynamic device and at least one breaker；Breaker is separately connected with low speed soft activator and high speed soft activator；High speed soft activator
It is connect with the high speed winding of invariable frequency compressor；The connection of the low speed winding of low speed soft activator and invariable frequency compressor.
Further, when further including at least one set of revolving speed in invariable frequency compressor between high speed winding and low speed winding
When middling speed winding, several starting contactors are also set up in the soft activator power control cabinet；The output end of its high speed soft activator
It is connected by the high speed winding of a starting contactor and invariable frequency compressor；If dry doubling is arranged on the output end of low speed soft activator
The starting contactor of column, several starting contactors arranged side by side connected in the way of docking one by one low speed winding and each middling speed around
Group.
Further, a breaker is respectively set in front of high speed soft activator and a low speed soft activator；Two disconnected
Road device is connected in parallel on power supply.
Further, a disconnecting switch QS is connected on the front main road of two breakers；It is made up of disconnecting switch QS
Two soft activators are selectively connect with respective soft activator.
It is a kind of to be existed using above-mentioned central idle call double speed or the driving method of multispeed electric machine drive system, feature
In: power initiation major loop configures two soft activators, and the high speed winding and low speed winding of double speed or multispeed electric machine are used respectively
The driving of two soft activators, high speed soft activator control the high speed winding of motor, low speed soft activator control the low speed of motor around
Group；Output interlocking between high speed soft activator and low speed soft activator shares operation, the starting of motor jointly.
Further, when machine winding be include the multi-speed winding of high speed winding, middling speed winding and low speed winding when, A is
Maximum speed, B are intermediate speed, and winding is corresponding with the matching rule of soft activator are as follows: as A >=winding revolving speed > B, by high speed
Soft start driving；Winding revolving speed≤B；All driven by low speed soft activator.
Further, electric motor starting mode is soft start, and start-up mode is slope current mode, to electric motor starting current peak
It is worth current limliting, adjusts starting voltage, electric current, which smoothly rises, makes motor speed reach rated speed completion electric motor starting, the high speed of motor
Winding corresponds to a high speed soft activator, and Protection parameters are limited by high speed current protection, and starting current is also limited according to high speed electric current
System guarantees that starting current is smooth；The low speed winding of motor corresponds to low speed soft activator, and Protection parameters are pressed low speed current protection, opened
Streaming current guarantees that starting current is smooth also according to low speed current limit.
Further, motor speed switching mode are as follows: when cutting low speed or middling speed at a high speed, first high speed soft activator stops defeated
Out, after the motor free parking several seconds, start low speed soft activator, starting motor makes motor operation in low speed or middling speed；In the middle
When speed cuts low speed, first low speed soft activator stops output, and after the motor free parking several seconds, machine winding switches from middling speed winding
To low speed winding, it is then again started up low speed soft activator, starting motor makes motor operation in low speed；When low speed cuts high speed,
First low speed soft activator stops output, after the motor free parking several seconds, starts high speed soft activator, starting motor transports motor
Row is in high speed.
The beneficial effects of the utility model are:
1, a soft activator drives high speed winding, and a soft activator drives low speed winding, exports between soft activator
Interlocking shares operation, the starting of motor jointly, can meet motor frequent starting, extend the drive system service life.
2, two soft activator parameters of major loop configuration are matched with double-speed motor winding respectively, and high current soft activator is driven
Dynamic high-speed motor winding, low current soft activator drive slowspeed machine winding, and parameter is corresponding with high, low speed motor, and protection is more pacified
Entirely, performance is more preferable；
3, using soft activator driving motor, electric current is smooth in start-up course, and starting current peak value is adjustable, without secondary
Impact.
This system soft activator is spliced directly to motor binding post, double-speed motor six roots of sensation binding post, and soft activator, which is only used, divides
6 groups of power cables are not docked with motor, wiring is simple.
This system uses soft activator, and start-up mode uses slope current scheme, starting current can be made smooth, to height
Speed, slowspeed machine start up curve more match.
This system use soft activator, soft activator ontology have than more comprehensive defencive function (mistake/under-voltage protection, it is inverse
Mutually protect, unbalance protection of three-phase current, input/output phase shortage etc.) to electric motor protecting more comprehensively, it is safer.
Detailed description of the invention
Fig. 1 is the structure principle chart of the utility model central air-conditioning double-speed motor drive system.
Fig. 2 is the circuit structure of the one of specific embodiment of the utility model central air-conditioning double-speed motor drive system
Figure.
Fig. 3 is the major loop structure figure that the utility model double-speed motor drive system is driven based on single soft activator.
Fig. 4 is the major loop that the utility model double-speed motor drive system drives another embodiment based on single soft activator
Structure chart.
Fig. 5 is double speed operation and the method for handover control flow chart of the utility model double-speed motor drive system.
Appended drawing reference is as follows in Fig. 1-5: 1, determining frequency multi-speed compressor, (machine winding 1,2,3 therein is high speed winding, electricity
Machine winding 4,5,6 be low speed winding), 2, soft activator power control cabinet (QM1 be high speed soft activator, QM2 be low speed soft activator,
QF is breaker, and QS is disconnecting switch), 3, controller (CB).
Fig. 6 is the structural schematic diagram of the utility model central air-conditioning multispeed electric machine drive system.
Fig. 7 is the circuit structure of the one of specific embodiment of the utility model central air-conditioning multispeed electric machine drive system
Figure.
Fig. 8 is the three speed operation of the utility model central air-conditioning multispeed electric machine drive system and switching control flow chart.
Specific embodiment
The central air-conditioning double speed or multispeed electric machine drive system implemented according to the utility model are as shown in figures 1-8.
It is as shown in Figure 1 the structural schematic diagram of the utility model central air-conditioning double-speed motor drive system.Wherein control
Device 3 is connect with soft activator power control cabinet 2, and soft activator power control cabinet 2 is connect with frequency multi-speed compressor is determined；Soft activator power control cabinet 2
A middle setting one circuit breaker Q F, a high speed soft activator QM1 and low speed soft activator QM2；Determine frequency multi-speed compressor 1
In include one group of high speed winding (machine winding 1,2,3) and one group of low speed winding (machine winding 4,5,6).
It is illustrated in figure 2 the circuit of the central air-conditioning one of specific embodiment of double-speed motor drive system in Fig. 1
Structure chart.Wherein, the control terminal of high speed soft activator QM1 and low speed soft activator QM2 are respectively connected in parallel on controller 3；
The input terminal (each terminal of L1, L2, L3) of high speed soft activator QM1 and low speed soft activator QM2 is each to be mutually connected in parallel on breaker respectively
On three-phase terminal after QF disconnect switch；The output end (each terminal of L4, L5, L6) of high speed soft activator QM1 is connected in turn
(machine winding 1,2,3) is determined on each winding of high speed winding of frequency multi-speed compressor 1；Low speed soft activator QM2 output end (L4,
Each terminal of L5, L6) (machine winding 4,5,6) is connected on each winding of low speed winding for determining frequency multi-speed compressor 1 in turn.
Fig. 3 is the major loop structure figure that the utility model double-speed motor drive system is driven based on double soft activators.It is
A mutation embodiment of embodiment in Fig. 2, the difference with Fig. 2 use two circuit breaker Qs F1 and QF2, each breaker connection
Then one soft activator drives double-speed motor by two soft activators.High speed soft activator QM1 and low speed soft activator
QM2 is respectively started according to the on-off of circuit breaker Q F1 and QF2, realizes and drives double-speed motor based on single soft activator.
Fig. 4 is the major loop that the utility model double-speed motor drive system drives another embodiment based on single soft activator
Structure chart.A disconnecting switch QS is connected on the front main road of its two circuit breaker Qs F1 and QF2 in Fig. 3；By keeping apart
It closes QS two soft activators of composition selectable realize and double-speed motor is driven based on single soft activator.
Fig. 5 is double speed operation and the method for handover control flow chart of above-mentioned double-speed motor drive system.Wherein:
Electric motor starting mode is soft start, and start-up mode is slope current mode, to electric motor starting current peak current limliting, is adjusted
Section starting voltage, electric current, which smoothly rises, makes motor speed reach rated speed completion electric motor starting, the high speed winding 1,2,3 of motor
The soft activator (QM1) of a corresponding high current, Protection parameters press high speed current protection, and starting current is also limited according to high speed electric current
System guarantees that starting current is smooth；The soft activator (QM2) of the corresponding low speed electric current of the low speed winding 4,5,6 of motor, protection ginseng
Number presses low speed current protection, and starting current guarantees that starting current is smooth also according to low speed current limit;
Motor high speed is with low speed switching mode: when cutting low speed at a high speed, first high speed soft activator QM1 stops output, motor
Starting low speed soft activator QM2 starting motor after the free parking several seconds makes motor operation in low speed；When low speed cuts high speed, first
Low speed soft activator QM2 stops output, and starting high speed soft activator QM1 starting motor after the motor free parking several seconds makes motor
Operate in high speed;
Two soft activators share the starting of a motor, operation jointly, and soft activator one runs then another stopping,
Can meet the needs of frequent starting, prolong the service life;
In all startings and operational process, current signal is fed back to controller by soft activator, and controller is according to current value
Protect the starting and operating condition of motor.
Fig. 6 is the structural schematic diagram of the utility model central air-conditioning multispeed electric machine drive system.Wherein controller 3 with it is soft
Starter power control cabinet 2 connects, and soft activator power control cabinet 2 is connect with frequency multi-speed compressor 1 is determined；It is arranged in soft activator power control cabinet 2
One circuit breaker Q F, a high speed soft activator QM1, a low speed soft activator QM2 and N number of starting contactor (KM1~KMN
For starting contactor)；Determine in frequency multi-speed compressor 1 include multiple groups winding, at least one set of high speed winding (machine winding 1,2,3) and
One group of low speed winding (machine winding N, N+1, N+2).
Fig. 7 is the circuit structure of the one of specific embodiment of the utility model central air-conditioning multispeed electric machine drive system
Figure.Wherein, the control terminal of high speed soft activator QM1 and low speed soft activator QM2 are respectively connected in parallel on controller 3；At a high speed
Each circuit breaker Q F that is mutually connected in parallel on respectively of the input terminal (each terminal of L1, L2, L3) of soft activator QM1 and low speed soft activator QM2 breaks
On three-phase terminal after way switch；The output end (each terminal of L4, L5, L6) of high speed soft activator QM1 passes through starting contactor
KM1 is connected on each winding of high speed winding for determining frequency multi-speed compressor 1 (machine winding 1,2,3) in turn；Low speed soft activator QM2
Output end (each terminal of L4, L5, L6) parallel output at least both ends, wherein one end is connected in turn by starting contactor KMN
Determine on each winding of low speed winding of frequency multi-speed compressor 1 (N, N+1, N+2)；The other end is sequentially connected by starting contactor KM2
On each winding of middling speed winding for determining frequency multi-speed compressor 1 (4,5,6)；And so on.
Fig. 8 is the three speed operation of central air-conditioning multispeed electric machine drive system implemented according to Fig. 6-7 and method for handover control
Flow chart.
Motor speed switching mode are as follows: when cutting low speed or middling speed at a high speed, first high speed soft activator stops output, and motor is certainly
After the parking several seconds, start low speed soft activator, starting motor makes motor operation in low speed or middling speed；When middling speed cuts low speed
When, first low speed soft activator stops output, after the motor free parking several seconds, machine winding from middling speed winding be switched to low speed around
Group, is then again started up low speed soft activator, and starting motor makes motor operation in low speed；When low speed cuts high speed, first low speed is soft
Starter stops output, after the motor free parking several seconds, starts high speed soft activator, starting motor makes motor operation in height
Speed.
Before electric motor starting, the control of controller 3 needs the corresponding contactor KMN of winding to be started to be first attracted, and then controls
Soft activator QM starting.
When switching, controller first stops the starter QM to work, then discharges the corresponding contactor KM of winding, then again
Starting needs the starter QM run, then is connected to the corresponding contactor KM of winding.
First high speed soft activator QM1 stops output, starts low speed soft activator QM2 starting after the motor free parking several seconds
Motor makes motor operation in low speed；When hit at a high speed speed when, middling speed soft activator QM2 starting motor make motor operation in middling speed;
When cutting low speed from middling speed, low speed soft activator QM2 starting motor makes motor operation in low speed.
The matching rule of multi-speed (speed stage is greater than 2) motor and soft activator: high current soft activator driving high speed electricity
Machine winding, low current soft activator drive slowspeed machine winding.
Specifically: the upper current limit of high speed soft activator by maximum speed be A winding determine, the electricity of low speed soft activator
The stream upper limit determines that winding matching rule is corresponding by the winding that intermediate speed is B are as follows:
A >=winding revolving speed > B is driven by high speed soft start；Winding revolving speed≤B；All driven by low speed soft activator.
Double speed and multispeed electric machine drive system the major loop configuration of the utility model are not limited to the above form, all using double soft
Starter drives the scheme of double speed or multispeed electric machine all in protection scope.
The utility model has the beneficial effect that as a result:
1, major loop configures two soft activators, and a soft activator drives high speed winding, and a soft activator driving is low
Fast winding, output interlocking between soft activator share operation, the starting of motor jointly, can meet motor frequent starting, extend and drive
Dynamic lifetime of system.
2, soft activator is spliced directly to motor binding post, double-speed motor six roots of sensation binding post, soft activator only use respectively with
Motor docks 6 groups of power cables, and wiring is simple.
3, two soft activator parameters of major loop configuration are matched with double-speed motor winding respectively, and high current soft activator is driven
Dynamic high-speed motor winding, low current soft activator drive slowspeed machine winding, and parameter is corresponding with high, low speed motor, and protection is more pacified
Entirely, performance is more preferable；
4, using soft activator driving motor, electric current is smooth in start-up course, and starting current peak value is adjustable, starts mould
Formula uses slope current scheme, and starting current can be made smooth, and to high speed, slowspeed machine start up curve is more matched.Without secondary punching
It hits.Soft activator ontology has than more comprehensive defencive function (mistake/under-voltage protection, anti-phase protection, three-phase current unbalance guarantor
Shield, input/output phase shortage etc.) to electric motor protecting more comprehensively, it is safer.
Claims (4)
1. a kind of central air-conditioning double speed or multispeed electric machine drive system, including controller, soft activator power control cabinet；Controller with
The connection of soft activator power control cabinet；Include at least one set of high speed it is characterized by also including invariable frequency compressor, in invariable frequency compressor around
Group and at least one set of low speed winding；One high speed soft activator and a low speed soft start are set in the soft activator power control cabinet
Device and at least one breaker；Breaker is separately connected with low speed soft activator and high speed soft activator；High speed soft activator with
The high speed winding of invariable frequency compressor connects；The connection of the low speed winding of low speed soft activator and invariable frequency compressor.
2. central air-conditioning double speed according to claim 1 or multispeed electric machine drive system, it is characterised in that: when determining frequency pressure
When further including middling speed winding of at least one set of revolving speed between high speed winding and low speed winding in contracting machine, the soft activator electricity
Several starting contactors are also set up in control cabinet；The output end of its high speed soft activator is pressed by a starting contactor and fixed frequency
The high speed winding of contracting machine connects；Several starting contactors arranged side by side are set on the output end of low speed soft activator, this is several side by side
Starting contactor low speed winding and each middling speed winding are connected in the way of docking one by one.
3. central air-conditioning double speed according to claim 1 or multispeed electric machine drive system, it is characterised in that: soft in high speed
A breaker is respectively set in front of starter and a low speed soft activator；Two breakers are connected in parallel on power supply.
4. central air-conditioning double speed according to claim 3 or multispeed electric machine drive system, it is characterised in that: two open circuits
A disconnecting switch QS is connected on the front main road of device；Two soft activators are constituted selectively and respectively by disconnecting switch QS
Soft activator connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820746840.6U CN208369493U (en) | 2018-05-18 | 2018-05-18 | A kind of central air-conditioning double speed or multispeed electric machine drive system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820746840.6U CN208369493U (en) | 2018-05-18 | 2018-05-18 | A kind of central air-conditioning double speed or multispeed electric machine drive system |
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| CN208369493U true CN208369493U (en) | 2019-01-11 |
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| CN201820746840.6U Active CN208369493U (en) | 2018-05-18 | 2018-05-18 | A kind of central air-conditioning double speed or multispeed electric machine drive system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429490A (en) * | 2018-05-18 | 2018-08-21 | 麦克维尔空调制冷(武汉)有限公司 | A kind of central air-conditioning double speed or multispeed electric machine drive system and method |
-
2018
- 2018-05-18 CN CN201820746840.6U patent/CN208369493U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429490A (en) * | 2018-05-18 | 2018-08-21 | 麦克维尔空调制冷(武汉)有限公司 | A kind of central air-conditioning double speed or multispeed electric machine drive system and method |
| CN108429490B (en) * | 2018-05-18 | 2023-12-19 | 麦克维尔空调制冷(武汉)有限公司 | Double-speed or multi-speed motor driving system and method for central air conditioner |
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