CN109778433A - The feedback control system and method for a kind of sewing machine and its brake energy - Google Patents
The feedback control system and method for a kind of sewing machine and its brake energy Download PDFInfo
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- CN109778433A CN109778433A CN201910063581.6A CN201910063581A CN109778433A CN 109778433 A CN109778433 A CN 109778433A CN 201910063581 A CN201910063581 A CN 201910063581A CN 109778433 A CN109778433 A CN 109778433A
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Abstract
The invention discloses a kind of feedback control systems of sewing machine brake energy, comprising: bus detection unit, for detecting the voltage value of power supply buses and being sent to controller；The controller being all connected with bus detection unit and switching circuit, for being off state between the input terminal and output end of control switch circuit when the voltage value for receiving brake instruction, and receiving is higher than preset first threshold；Input terminal is for receiving exchange input, the input terminal connection of output end and rectifier bridge, control terminal switching circuit connected to the controller.Using the scheme of the application, can damage to avoid the regeneration energy generated due to brake to the device on bus, and with energy-saving and environment-friendly effect.Disclosed herein as well is a kind of sewing machine and its back-feed control methods of brake energy, have relevant art effect.
Description
Technical field
The present invention relates to sewing technology fields, more particularly to a kind of sewing machine and its feedback control system of brake energy
And method.
Background technique
With the fast development for sewing industry in recent years, sewing machine braking quality is required also higher and higher.Sewing machine exists
When being braked, motor lines packet can generate energy, and motor lines packet energy can feed back to bus end, improve busbar voltage, such as
Fruit busbar voltage is lifted excessively high, it is possible to damage the device on bus, such as may be to the electrolytic capacitor on bus
It causes to impact, reduce the service life of electrolytic capacitor, even will cause over-voltage breakdown in the occasion of part, cause security risk.
In order to rapidly deplete regeneration energy when motor brake, avoid damaging the device on bus, it is existing
Scheme is usually external brake resistor.But brake resistor be easy overheating failure, or even smolder it is on fire, therefore still have compared with
Big security risk.Especially when the regeneration energy that the electric energy and brake that are input to bus generate is higher, brake resistor
The case where failure, is easier to occur.
In conclusion how to be effectively prevented from due to damage of the regeneration energy generated to the device on bus of braking, it is
Those skilled in the art's technical problem urgently to be solved at present.
Summary of the invention
The object of the present invention is to provide a kind of sewing machine and its feedback control system and method for brake energy, to avoid by
In damage of the regeneration energy that brake generates to the device on bus.
In order to solve the above technical problems, the invention provides the following technical scheme:
A kind of feedback control system of sewing machine brake energy, comprising:
Bus detection unit, for detecting the voltage value of power supply buses and being sent to controller；
The controller being all connected with the bus detection unit and switching circuit, for referring to receiving brake
Enable, and the voltage value received be higher than preset first threshold when, control input terminal and the output of the switching circuit
It is off state between end；
Input terminal is for receiving exchange input, the input terminal connection of output end and rectifier bridge, control terminal and the controller
The switching circuit of connection.
Preferably, the switching circuit includes:
Normally closed relay, input terminal of the first controlled terminal of the normally closed relay as the switching circuit are described normal
Close output end of the second controlled terminal of relay as the switching circuit, the first control terminal and first of the normally closed relay
The anode connection of power supply, the second control terminal of the normally closed relay and the collector of triode connect；
The base stage of the triode is connect as the control terminal of the switching circuit with the controller, the triode
Emitter ground connection.
Preferably, the switching circuit further include:
The first current limliting electricity between first control terminal of the normally closed relay and the anode of first power supply is set
Resistance；
The second current-limiting resistance between the base stage of the triode and the controller is set.
Preferably, the switching circuit further include:
First end is connect with the base stage of the triode, the pull down resistor of second end ground connection.
Preferably, the switching circuit further include:
Anode is connect with the second control terminal of the normally closed relay, the first control terminal of cathode and the normally closed relay
The freewheeling diode of connection.
Preferably, the controller is also used to:
When the voltage value received is lower than preset second threshold, the input terminal and output end of the switching circuit are controlled
Between be on state；Wherein, the second threshold is lower than the first threshold.
Preferably, further includes:
It is arranged on firewire, first end is connect for receiving exchange input, second end with the input terminal of the switching circuit
Negative tempperature coefficient thermistor.
A kind of back-feed control method of sewing machine brake energy, comprising:
The voltage value of bus detection unit detection power supply buses is simultaneously sent to controller；
Controller is receiving brake instruction, and the voltage value received be higher than preset first threshold when, control
It is off state between the input terminal and output end of switching circuit processed；
Wherein, the input terminal of the switching circuit is for receiving exchange input, the output end of the switching circuit and rectification
The input terminal of bridge connects, and the control terminal of the switching circuit is connect with the controller.
Preferably, further includes:
When the voltage value that the controller receives is lower than preset second threshold, the input of the switching circuit is controlled
It is on state between end and output end；Wherein, the second threshold is lower than the first threshold.
A kind of sewing machine, the feedback control system including sewing machine brake energy described in any of the above embodiments.
Using technical solution provided by the embodiment of the present invention, comprising: bus detection unit, for detecting power supply buses
Voltage value is simultaneously sent to controller；The controller being all connected with bus detection unit and switching circuit, for receiving brake
Vehicle instruction, the and when voltage value received is higher than preset first threshold, the input terminal of control switch circuit and output end it
Between be off state；Input terminal is for receiving exchange input, the input terminal connection of output end and rectifier bridge, control terminal and controller
The switching circuit of connection.
In the scheme of the application, since bus detection unit can detecte the voltage value of power supply buses and be sent to control
Device, thus controller the voltage value for receiving brake instruction, and receiving be higher than preset first threshold when, can be true
It surely is since busbar voltage caused by braking rises, controller will pass through the input of the control terminal control switch circuit of switching circuit
It is off state between end and output end.The input terminal of switching circuit for receiving exchange input, output end and rectifier bridge it is defeated
Enter end connection, therefore when switching circuit open circuit, bus no longer receives exchange input, and busbar voltage can be reduced, can also be kept away
Damage of the regeneration energy for exempting to generate due to brake to the device on bus.Also, work as the input terminal and output end of switching circuit
Between be off state when, busbar voltage by brake generate regeneration energy provide, scheme energy conservation and environmental protection.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of the feedback control system of sewing machine brake energy in the present invention；
Fig. 2 is the structural schematic diagram of the switching circuit in a kind of specific embodiment of the present invention；
Fig. 3 is a kind of implementation flow chart of the back-feed control method of sewing machine brake energy in the present invention.
Specific embodiment
Core of the invention is to provide a kind of feedback control system of sewing machine brake energy, can produce to avoid due to brake
Damage of the raw regeneration energy to the device on bus, and energy conservation and environmental protection.
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.Obviously, described embodiments are only a part of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is a kind of structural schematic diagram of the feedback control system of sewing machine brake energy in the present invention,
May include:
Bus detection unit 10, for detecting the voltage value of power supply buses and being sent to controller 20.
Bus detection unit 10 is arranged on the power supply buses of sewing machine, and specific circuit is constituted and detection mode can be with
It is set and is adjusted according to actual needs, have no effect on implementation of the invention.In general, associated voltage detection circuit can be used
The detection of bus voltage value is directly carried out, the detection that can also first carry out associated current value is reconverted into the voltage of power supply buses
Value.
The controller 20 being all connected with bus detection unit 10 and switching circuit 30, for receiving brake instruction,
It and is disconnected between the input terminal and output end of control switch circuit 30 when the voltage value received is higher than preset first threshold
Line state.
Input terminal is for receiving exchange input, and the input terminal connection of output end and rectifier bridge, control terminal and controller 20 connect
The switching circuit 30 connect.
The voltage value for the power supply buses that bus detection unit 10 can will test is sent to controller 20, can be in real time
Transmission is also possible to be sent according to preset sending cycle.
In view of when sewing machine brakes, busbar voltage can rise, therefore the controller 20 of the application is in the electricity received
Pressure value is higher, and the voltage rising condition is sewing machine brake when causing, and power supply of the exchange input to bus is disconnected, so that female
Line voltage reduces, and can also recycle the feedback energy of brake, has saved energy consumption.Further, since without using
Braking circuit in the prior art improves fireproof security level.
The typically dsp controller of controller 20.Specifically, controller 20 is by judging whether to receive brake instruction
To determine whether busbar voltage is the voltage value that ought be received brake instruction, and receive since sewing machine brake causes
When higher than preset first threshold, controller 20 can be determined that be risen since brake results in busbar voltage, just control switch
It is off state between the input terminal and output end of circuit 30.The input terminal and output end of switching circuit 30 respectively with exchange it is defeated
Enter and the input terminal of rectifier bridge connects, is off state between the input terminal and output end of switching circuit 30, also means that
The electric energy that cannot obtain exchange input on power supply buses at this time provides, but can obtain the feedback energy of sewing machine brake.
First threshold can be set and be adjusted according to the actual situation, according to the analysis to circuit and can usually be showed
Experimental data determines that in a specific embodiment, first threshold can be set as 390V.
It may also be noted that switching circuit 30 default conditions be on state, i.e., the input terminal of switching circuit 30 with
Default conditions between output end are on state.
Further, it is contemplated that it is off state between the input terminal and output end of 20 control switch circuit 30 of controller,
After busbar voltage gradually decreases, controller 20 needs switching circuit 30 reverting to default conditions, enables power supply buses
The electric energy for normally obtaining exchange input provides.And the opportunity restored can be according to the time, bus voltage value etc. is because usually determining.
Such as controller 20 between the input terminal and output end of control switch circuit 30 for after off state, can be when preset
After length, switching circuit 30 is reverted to the on state of default again.
In a specific embodiment, controller 20 is also used to: when the voltage value received is lower than preset second threshold
It is on state between the input terminal and output end of control switch circuit 30 when value；Wherein, second threshold is lower than first threshold.
In this kind of embodiment, controller 20 decides whether to restore switching circuit 30 by the voltage value of the power supply buses received
For the on state of default.The value of second threshold can also be set and be chosen according to the actual circuit of sewing machine, not
It influences in implementation of the invention, such as a kind of specific occasion, second threshold is set as 300V.
Using the feedback control system of sewing machine brake energy provided by the embodiment of the present invention, comprising: bus detection is single
Member 10, for detecting the voltage value of power supply buses and being sent to controller 20；With bus detection unit 10 and switching circuit 30
The controller 20 being all connected with, for the voltage value for receiving brake instruction, and receiving be higher than preset first threshold when,
It is off state between the input terminal and output end of control switch circuit 30；Input terminal for receive exchange input, output end with
The input terminal of rectifier bridge connects, the switching circuit 30 that control terminal is connect with controller 20.
In the scheme of the application, since bus detection unit 10 can detecte the voltage value of power supply buses and be sent to control
Device 20, thus controller 20 the voltage value for receiving brake instruction, and receiving be higher than preset first threshold when,
It is since busbar voltage caused by braking rises with determination, controller 20 will pass through the control terminal control switch electricity of switching circuit 30
It is off state between the input terminal and output end on road 30.The input terminal of switching circuit 30 is for receiving exchange input, output end
It is connect with the input terminal of rectifier bridge, therefore when 30 open circuit of switching circuit, bus no longer receives exchange input, busbar voltage can drop
It is low, it also can be to avoid due to damage of the regeneration energy generated to the device on bus of braking.Also, when switching circuit 30
When being off state between input terminal and output end, busbar voltage is provided by the regeneration energy that brake generates, scheme energy conservation and environmental protection.
The specific composition of the switching circuit 30 of the application can be set according to actual needs, as long as can satisfy this Shen
Demand please has no effect on implementation of the invention.Such as high-voltage thyristor, IGBT and relevant control can be chosen for
Circuit is as switching circuit 30.Further, in the specific embodiment of Fig. 2, it is contemplated that using devices such as IGBT as switch
When circuit 30, higher cost and driving method is complex, the switching circuit 30 in this kind of embodiment includes:
Input terminal of the first controlled terminal of normally closed relay K1, normally closed relay K1 as switching circuit 30, normally closed relay
Output end of the second controlled terminal of device K1 as switching circuit 30, the first control terminal of normally closed relay K1 and the first power supply are just
Pole connection, the second control terminal of normally closed relay K1 are connect with the collector of triode Q1；
The base stage of triode Q1 is connect as the control terminal of switching circuit 30 with controller 20, and the emitter of triode Q1 connects
Ground.
In Fig. 2, the first controlled terminal of normally closed relay K1 number 1 is indicated, correspondingly, the of normally closed relay K1
Two controlled terminals, the first control terminal of normally closed relay K1 and the second control terminal of normally closed relay K1 successively use number 2,3,4
It indicates.The anode of first power supply is indicated in Fig. 2 with Vcc.
Triode Q1 in this kind of embodiment is NPN type triode.When 20 not sent associated control signal of controller,
The base stage of triode Q1 is low level, is off state between collector and emitter, also allows in normally closed relay K1
Inductance there is no electric current to pass through, be connected between the first controlled terminal and the second controlled terminal of normally closed relay K1, i.e. switching circuit 30
The working condition of default is on state.And when controller 20 sends the control signal of high level to triode Q1, triode
It is connected between the collector and emitter of Q1, there is electric current to pass through in the inductance in normally closed relay K1, so that normally closed relay
The first controlled terminal of device K1 is separated with the first controlled terminal.The concrete model parameter of normally closed relay K1 can be according to practical need
It is chosen, such as can be JQ-3FF-S-B with model.
Cost is relatively low for switching circuit 30 in this kind of embodiment, and driving method is simple.
In a kind of specific embodiment of the invention, switching circuit 30 further include:
The first current-limiting resistance R4 between the first control terminal of normally closed relay K1 and the anode of the first power supply is set；
The second current-limiting resistance R2 between the base stage of triode Q1 and controller 20 is set.
In this kind of embodiment, by the setting of current-limiting resistance, when being conducive to that circuit is avoided to be connected, due to dash current mistake
It is damaged caused by the devices such as switching circuit 30 or the first power supply caused by big.
In a kind of specific embodiment of the invention, switching circuit 30 further include:
First end is connect with the base stage of triode Q1, the pull down resistor R3 of second end ground connection.
When controller 20 does not send the control signal of high level to triode Q1, the base stage of triode Q1 is low level shape
State, but in practical applications, especially when sewing machine starts, due to the influence of the factors such as interference, it may result in triode
The base stage of Q1 is high level, also allows for switching circuit 30 and is accidentally turned off, sewing machine can not may normally start.This kind is implemented
Pull down resistor R3 is provided in mode also can effectively keep away since the base stage of triode Q1 is grounded by pull down resistor R3
Exempt from the base level virtual height of triode Q1, the case where switching circuit 30 is accidentally turned off.
In a kind of specific embodiment of the invention, switching circuit 30 further include:
Anode is connect with the second control terminal of normally closed relay K1, and cathode is connect with the first control terminal of normally closed relay K1
Sustained diode 1.
Since the inductive discharge in normally closed relay K1 needs certain time-consuming, it is provided in this kind of embodiment continuous
Diode D1 is flowed, inductive discharge is accelerated by sustained diode 1, is also advantageous for accelerating the switching action of normally closed relay K1,
I.e. so that switching circuit 30 is more rapid to the response of controller 20.
In a kind of specific embodiment of the invention, further includes:
It is arranged on firewire, first end is connect for receiving exchange input, second end with the input terminal of switching circuit 30
Negative tempperature coefficient thermistor R1.
The switching circuit 30 of the application usually requires to be arranged on firewire, in this kind of embodiment, it is contemplated that on sewing machine
When electrically activating, dash current may be larger and causes to impact to circuit, and especially in late-class circuit, the quantity of capacitor is more
When, dash current may be bigger.Therefore, it is provided in this kind of embodiment and connects with the normally closed relay K1 in switching circuit 30
Negative tempperature coefficient thermistor R1, with realize charging buffering.Specifically, when sewing machine electrifying startup, negative temperature coefficient heat
The resistance value of quick resistance R1 is higher, can reduce the size of dash current, and as electric current flows through negative tempperature coefficient thermistor
R1, after temperature increases, the resistance value of negative tempperature coefficient thermistor R1 is gradually decreased, and also just reduces negative temperature coefficient thermistor power
The power loss for hindering R1, avoids waste of energy.
In addition, in the embodiment of Fig. 2, the model of normally closed relay K1, the voltage swing of the first power supply, negative temperature system
The model and resistance value of number thermistor R1, the second current-limiting resistance R2, pull down resistor R3 and the first current-limiting resistance R4, freewheeling diode
The model etc. of D1 can be set and be adjusted according to actual needs, such as in a specific embodiment, be opened in Fig. 2
The model and parameter of the specific device on powered-down road 30 are as shown in Table 1.
Table one
| Vcc | R1 | R2 | R3 | R4 | Q1 | D1 |
| 15V | NTC10D25 | 2K/0603 | 10K/0603 | 100R/1206 | MMBT551 | LL4148 |
Corresponding to the system above embodiment, the embodiment of the invention also provides a kind of feedback controls of sewing machine brake energy
Method processed can correspond to each other reference with above.
It is shown in Figure 3, it, should for a kind of implementation flow chart of the back-feed control method of sewing machine brake energy in the present invention
Method the following steps are included:
Step S101: the voltage value of bus detection unit detection power supply buses is simultaneously sent to controller；
Step S102: controller is higher than preset first threshold in the voltage value for receiving brake instruction, and receiving
When, it is off state between the input terminal and output end of control switch circuit；Wherein, the input terminal of switching circuit is handed over for receiving
Stream input, the output end of switching circuit and the input terminal of rectifier bridge connect, and the control terminal of switching circuit is connect with controller.
Further, further includes:
When the voltage value that controller receives is lower than preset second threshold, the input terminal of control switch circuit and output
It is on state between end；Wherein, second threshold is lower than first threshold.
Corresponding to above method and system embodiment, the embodiment of the invention also provides a kind of sewing machines, may include
The feedback control system of sewing machine brake energy in any of the above-described embodiment, herein not repeated explanation.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including one ... ", it is not excluded that
There is also other identical elements in the process, method, article or apparatus that includes the element.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand technical solution of the present invention and its core concept.It should be pointed out that for the common of the art
, without departing from the principle of the present invention, can be with several improvements and modifications are made to the present invention for technical staff, these
Improvement and modification are also fallen within the protection scope of the claims of the present invention.
Claims (10)
1. a kind of feedback control system of sewing machine brake energy characterized by comprising
Bus detection unit, for detecting the voltage value of power supply buses and being sent to controller；
The controller being all connected with the bus detection unit and switching circuit, for receiving brake instruction, and
And the voltage value received be higher than preset first threshold when, control between the input terminal and output end of the switching circuit
For off state；
Input terminal is connect for receiving exchange input, the input terminal connection of output end and rectifier bridge, control terminal with the controller
The switching circuit.
2. the feedback control system of sewing machine brake energy according to claim 1, which is characterized in that the switching circuit
Include:
Normally closed relay, input terminal of the first controlled terminal of the normally closed relay as the switching circuit, it is described it is normally closed after
Output end of second controlled terminal of electric appliance as the switching circuit, the first control terminal and the first power supply of the normally closed relay
Anode connection, the collector of the second control terminal of the normally closed relay and triode connects；
The base stage of the triode is connect as the control terminal of the switching circuit with the controller, the transmitting of the triode
Pole ground connection.
3. the feedback control system of sewing machine brake energy according to claim 2, which is characterized in that the switching circuit
Further include:
The first current-limiting resistance between first control terminal of the normally closed relay and the anode of first power supply is set；
The second current-limiting resistance between the base stage of the triode and the controller is set.
4. the feedback control system of sewing machine brake energy according to claim 3, which is characterized in that the switching circuit
Further include:
First end is connect with the base stage of the triode, the pull down resistor of second end ground connection.
5. the feedback control system of sewing machine brake energy according to claim 4, which is characterized in that the switching circuit
Further include:
Anode is connect with the second control terminal of the normally closed relay, and cathode is connect with the first control terminal of the normally closed relay
Freewheeling diode.
6. the feedback control system of sewing machine brake energy according to claim 1, which is characterized in that the controller is also
For:
When the voltage value received is lower than preset second threshold, control between the input terminal and output end of the switching circuit
For on state；Wherein, the second threshold is lower than the first threshold.
7. the feedback control system of sewing machine brake energy according to any one of claims 1 to 6, which is characterized in that also
Include:
It is arranged on firewire, first end is connect negative for receiving exchange input, second end with the input terminal of the switching circuit
Temperature coefficient thermistor.
8. a kind of back-feed control method of sewing machine brake energy characterized by comprising
The voltage value of bus detection unit detection power supply buses is simultaneously sent to controller；
Controller is receiving brake instruction, and the voltage value received be higher than preset first threshold when, control is opened
It is off state between the input terminal and output end on powered-down road；
Wherein, the input terminal of the switching circuit is for receiving exchange input, the output end of the switching circuit and rectifier bridge
Input terminal connection, the control terminal of the switching circuit are connect with the controller.
9. the back-feed control method of sewing machine brake energy according to claim 8, which is characterized in that further include:
When the voltage value that the controller receives is lower than preset second threshold, control the input terminal of the switching circuit with
It is on state between output end；Wherein, the second threshold is lower than the first threshold.
10. a kind of sewing machine, which is characterized in that returning including sewing machine brake energy as described in any one of claim 1 to 7
Present control system.
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| CN201910063581.6A CN109778433A (en) | 2019-01-23 | 2019-01-23 | The feedback control system and method for a kind of sewing machine and its brake energy |
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| CN201910063581.6A CN109778433A (en) | 2019-01-23 | 2019-01-23 | The feedback control system and method for a kind of sewing machine and its brake energy |
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Application publication date: 20190521 |