CN111614246A - Rectifier, drive circuit and system with safe direct current output stop function - Google Patents
Rectifier, drive circuit and system with safe direct current output stop function Download PDFInfo
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- CN111614246A CN111614246A CN202010477298.0A CN202010477298A CN111614246A CN 111614246 A CN111614246 A CN 111614246A CN 202010477298 A CN202010477298 A CN 202010477298A CN 111614246 A CN111614246 A CN 111614246A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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Abstract
The invention relates to a rectifier, a driving circuit and a system with a safe direct current output stop function. The invention can safely, economically and effectively cut off the direct current output of the rectifier under the control of the safety chain or the safety relay, thereby ensuring the safe stop of the driven equipment. The driving circuit with the rectifier has the advantages of good safety and high shutdown stability, and meanwhile, the driving system of the textile machinery with the driving circuit is effectively improved.
Description
Technical Field
The invention relates to the field of power electronics, in particular to a rectifier, a driving circuit and a system with a safe direct current output stopping function.
Background
In order to solve the problem of synchronous machine stopping when the abnormal power supply of equipment is interrupted, a driver (comprising a frequency converter, a servo controller and the like) direct current common bus technology is currently applied to a driver side to convert the kinetic energy of the equipment into electric energy to maintain the synchronous machine stopping of the equipment, at the moment, the power supply of a control part of the equipment is continuously supplied until the equipment is completely stopped, and some data storage work such as data storage work may be carried out by additional several seconds. At present, when the power supply of the equipment is unexpectedly interrupted, the following two methods are used for ensuring that the control power supply continues to work for a certain time:
firstly, the control Power supply has the function of UPS, namely Uninterruptible Power System, which is an Uninterruptible Power supply containing an energy storage device. The power supply device is mainly used for providing uninterrupted power supply for partial equipment with higher requirements on power supply stability. However, since the UPS itself is expensive, the cost of the equipment is increased, and the UPS needs to be maintained by regular maintenance.
The electric control system has the advantages of being economical and easy to implement, but in the electrical design of a control system related to a safety chain, the problem that an initial control power supply is difficult to obtain exists, and aiming at the problem, the prior art has two different aiming solutions. One solution is to use two switching power supplies for control in cooperation with a two-in one-out controller, which solves the problem of obtaining an initial control power supply, but has large volume and high cost due to the introduction of more components. Another solution is to use a drive with STO (SAFE TORQUE OFF) function, instead of having a safety chain or safety relay controlled contactor before the main rectifier of the ac/dc converter, to ensure that the output of the drive is reliably cut OFF by the STO on the drive, but this solution requires all drives to be provided with STO, which results in a significant cost increase when the number of drives is large.
Disclosure of Invention
The invention aims to provide a rectifier with a safety direct current output stopping function, which can safely, economically and effectively cut off the direct current output of the rectifier under the control of a safety chain or a safety relay to ensure the safety stop of a driven device.
Furthermore, the invention also provides a driving circuit with the rectifier, which has the advantages of good safety and high shutdown stability, and simultaneously effectively improves the safety of a textile machinery driving system with the driving circuit.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a rectifier with a safe direct current output stop function, which comprises a safe digital quantity input system, a controllable rectification module and a control unit, wherein the controllable rectification module is connected with an alternating current power supply input, and the input end of the safe digital quantity input system comprises at least two safe output turn-off control signal input interfaces.
Optionally, an output end of the safety digital quantity input system is connected to an input end of the control unit, and is configured to transmit a safety input signal to the control unit, and an output end of the control unit is connected to the controllable rectification module, and is configured to control an output signal of the controllable rectification module.
Alternatively, the control power supply of the control unit may be from an external input control power supply.
Optionally, the control power supply of the control unit may be from the rectifier internal control power supply.
Optionally, the rectifier includes an ac/dc conversion module and a dc/dc conversion module, an input end of the ac/dc conversion module is connected to the ac power input, an output end of the ac/dc conversion module is connected to an anode of a first diode, an input end of the dc/dc conversion module is connected to an output end of the controllable rectification module, an output end of the dc/dc conversion module is connected to an anode of a second diode, and cathodes of the first diode and the second diode are both connected to a second input end of the control unit, so as to provide an internal control power supply for the control unit.
Optionally, the rectifier includes a controllable rectification module, a first diode, and a second diode, an output end of the controllable rectification module is connected to an anode of the first diode, an output end of the rectification module is connected to an anode of the second diode, and a cathode of the first diode and a cathode of the second diode are connected to serve as an input of the dc/dc conversion module.
The control unit is used for controlling the power supply of the power supply system, and the control unit is used for controlling the power supply of the power supply system to be supplied to the power supply system.
Furthermore, the control signals of the at least two safety output turn-off control signal input interfaces are from safety chains or safety relay output signals.
In particular, the invention also provides a driving circuit comprising the rectifier as described above.
In particular, the invention provides a textile machine driving system, which comprises the driving circuit and the textile machine electrically connected with the driving circuit.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the rectifier has the function of safe direct current output stop, the rectifier is provided with a safe digital quantity input system with at least two safe output turn-off control signal input interfaces, the safe digital quantity input system inputs safe input signals to the control unit, and the control unit is connected with the controllable rectifying module and is used for controlling the output of the controllable rectifying module, namely, the output of the controllable rectifying module is finally turned off in a grading way through at least two redundant safe input signals of the safe digital quantity input system, so that the reliable stop of the driving equipment is realized, meanwhile, the input of a main power supply on-off contactor and an STO on a driver is cancelled, and the equipment cost is effectively reduced.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic block diagram of a rectifier applied to a drive circuit according to one embodiment of the present invention;
FIG. 2 is a schematic block diagram of a rectifier applied to a drive circuit according to one embodiment of the present invention;
fig. 3 is a schematic block diagram of a rectifier applied to a driving circuit according to an embodiment of the present invention.
Wherein the reference numerals are as follows:
1. the safety digital quantity input system comprises 11 a safety output turn-off control signal input interface, 2 a controllable rectification module, 3 a control unit, 4 an alternating current/direct current conversion module, 5 a direct current/direct current conversion module, 6 a first diode, 7 a second diode, 8 a safety chain or safety relay output.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1:
the embodiment describes a rectifier with a safety direct current output stop function, as shown in fig. 1, the rectifier includes a safety digital input system 1, a controllable rectification module 2, and a control unit 3, the controllable rectification module 2 is connected with an alternating current power input, an input end of the safety digital input system 1 includes two safety output turn-off control signal input interfaces 11, and control signals of the two safety output turn-off control signal input interfaces 11 are from a safety chain or an output signal of a safety relay 8. The output end of the safe digital quantity input system 1 is connected with the input end of the control unit 3 and used for transmitting a safe input signal to the control unit 3, and the output end of the control unit 3 is connected with the controllable rectification module 2 and used for controlling an output signal of the controllable rectification module 2. The rectifier may have a turn-off dc output and an uninterrupted dc output, outputting an uninterrupted low voltage dc.
The control power supply of the control unit 3 may come from the rectifier internal control power supply. In particular, the rectifier further comprises an alternating current/direct current conversion module 4 and a direct current/direct current conversion module 5, the input end of the alternating current/direct current conversion module 4 is connected with the alternating current power supply input, the output end of the alternating current/direct current conversion module 4 is connected with the anode of the first diode 6, the input end of the dc/dc conversion module 5 is connected with the output end of the controllable rectification module 2, the output end of the dc/dc conversion module 5 is connected to the anode of the second diode 7, the cathodes of the first diode 6 and the second diode 7 are both connected to a second input terminal of the control unit 3, the uninterrupted low-voltage direct current output end is connected with the cathodes of the first diode 6 and the second diode 7.
In this embodiment, the dc electrical bus of the inverter of the spinning machine is connected to the ac power grid through the rectifier, and when the ac power provided by the ac power grid is interrupted, in order to continue to operate the spinning machine for a period of time to stop the motor of the spinning machine in a controlled speed reduction manner, in this embodiment, an uninterruptible low-voltage dc output (usually 24V) in the rectifier is led out to be directly connected to the safety relay 8, and the output of the safety relay 8 outputs the uninterruptible power to the safety digital input system 1 through the safety output shutdown control signal input interface 11, so that the input of the STO equipment can be omitted, and not only the expensive UPS (uninterruptible power supply) is omitted, but also the input of a large amount of STO equipment can be overcome, thereby saving the manufacturing cost of. Meanwhile, the safety digital input system 1 is provided with two safety output turn-off control signal input interfaces 11, so that the rectifier of the embodiment can reduce the cost and ensure the working safety and reliability through at least two redundant safety signals, and is expected to meet specific (such as European Union) electrical safety standards.
Example 2:
the embodiment describes a rectifier with a safety direct current output stop function, as shown in fig. 2, the rectifier includes a safety digital input system 1, a controllable rectification module 2, and a control unit 3, the controllable rectification module 2 is connected with an alternating current power input, an input end of the safety digital input system 1 includes two safety output turn-off control signal input interfaces 11, and control signals of the two safety output turn-off control signal input interfaces 11 are from a safety chain or an output signal of a safety relay 8. The output end of the safe digital quantity input system 1 is connected with the input end of the control unit 3 and used for transmitting a safe input signal to the control unit 3, and the output end of the control unit 3 is connected with the controllable rectification module 2 and used for controlling an output signal of the controllable rectification module 2. The output end of the dc/dc conversion module 5 is connected to the second input end of the control unit 3, and is configured to provide an internal control power supply for the control unit 3.
The control power supply of the control unit 3 may come from the rectifier internal control power supply. Specifically, the rectifier comprises a controllable rectifier module 2, a rectifier module 9, a first diode 6, a second diode 7 and a dc/dc conversion module 5, wherein an output end of the controllable rectifier module 2 is connected with an anode of the first diode 6, an output end of the rectifier module 9 is connected with an anode of the second diode 7, and the first diode 6 is connected with a cathode of the second diode 7 as an input of the dc/dc conversion module 5. Cathodes of the first diode 6 and the second diode 7 are both connected to an input end of the dc/dc conversion module 5, and an output end of the dc/dc conversion module 5 is connected to a second input end of the control unit 3, so as to provide an internal control power supply for the control unit 3.
The rectifier described in this embodiment may have a turn-off dc output, and the rectifier may further be configured with an uninterrupted dc output, where the output of the uninterrupted dc output may be an uninterrupted high voltage dc, or an uninterrupted low voltage dc, and may be adjusted according to different setting positions of the uninterrupted dc output, and when the output of the uninterrupted dc output is an uninterrupted high voltage dc, the uninterrupted high voltage dc output is connected to both cathodes of the first diode 6 and the second diode 7; and when the output of the uninterrupted dc output terminal is uninterrupted low voltage dc, the uninterrupted low voltage dc output terminal is connected to the output terminal of the dc/dc conversion module 5. The specific setting can be determined according to the equipment requirements, such as the property parameters of the components needing uninterrupted direct current power supply, such as the safety relay 8.
In this embodiment, the dc electrical bus of the inverter of the spinning machine is connected to the ac power grid through the rectifier, in order to make the spinning machine continue to operate for a period of time and make the motor of the spinning machine controlled to decelerate and stop when the ac power provided by the ac power grid is interrupted, the embodiment leads out the uninterruptible high voltage dc output in the rectifier to be directly connected to the safety relay 8 through the dc/converted to the low voltage control power or the uninterruptible low voltage dc output (usually 24V), and the output of the safety relay 8 outputs the uninterruptible power to the safety digital input system 1 through the safety output shutdown control signal input interface 11, so that the input of the STO equipment can be saved, not only the expensive UPS (uninterruptible power supply) can be saved, but also the input of a large amount of STO equipment can be overcome, and the manufacturing cost of the equipment. Meanwhile, the safety digital input system 1 is provided with two redundant safety output turn-off control signal input interfaces 11, so that the rectifier of the embodiment can reduce the cost and ensure the working safety and reliability through at least two redundant safety signals, and is expected to meet specific (such as European Union) electrical safety standards.
Example 3:
the embodiment describes a rectifier with a safety direct current output stop function, as shown in fig. 3, the rectifier includes a safety digital input system 1, a controllable rectification module 2, and a control unit 3, the controllable rectification module 2 is connected with an alternating current power input, an input end of the safety digital input system 1 includes two safety output turn-off control signal input interfaces 11, and control signals of the two safety output turn-off control signal input interfaces 11 are from a safety chain or an output signal of a safety relay 8. The output end of the safe digital quantity input system 1 is connected with the input end of the control unit 3 and used for transmitting a safe input signal to the control unit 3, and the output end of the control unit 3 is connected with the controllable rectification module 2 and used for controlling an output signal of the controllable rectification module 2. The control power supply of the control unit 3 may be from an external input control power supply.
The safety digital input system 1 is provided with two safety output turn-off control signal input interfaces 11, so that the rectifier of the embodiment can reduce the cost and ensure the working safety and reliability through at least two redundant safety signals, and is expected to meet specific (such as European Union) electrical safety standards.
Example 4:
the present embodiment provides a driving circuit including the rectifier as described above. The rectifier of the driving circuit reduces the cost and ensures the working safety and reliability through at least two redundant safety signals, and is expected to meet specific (such as European Union) electrical safety standards.
Example 5:
the embodiment provides a textile machine driving system, which comprises the driving circuit and a textile machine electrically connected with the driving circuit. The output of the controllable rectifier module is finally turned off in a grading way through at least two redundant safe input signals of the safe digital quantity input system, the slow-step shutdown of the equipment is realized, meanwhile, the investment of a power supply main contactor and an STO is cancelled, and the equipment cost is effectively reduced.
In summary, the rectifier of the present invention has a function of stopping the safe dc output, and the rectifier is provided with a safe digital input system having at least two safe output shutdown control signal input interfaces, and the safe digital input system inputs the safe input signal to the control unit, and the control unit is connected to the controllable dc module and is used for controlling the output of the controllable rectifier module, that is, the output of the controllable rectifier module is finally shutdown in stages by the at least two redundant safe input signals of the safe digital input system, so as to implement the slow shutdown of the device, and simultaneously cancel the input of the main contactor of the power supply and the STO, thereby effectively reducing the cost of the device.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Claims (10)
1. A rectifier with safe direct current output stop function, includes safe digital quantity input system, controllable rectifier module, the control unit, its characterized in that: the controllable rectification module is connected with an alternating current power supply input, and the input end of the safe digital quantity input system comprises at least two safe output turn-off control signal input interfaces.
2. The rectifier of claim 1, wherein: the output end of the safe digital quantity input system is connected with the input end of the control unit and used for transmitting a safe input signal to the control unit, and the output end of the control unit is connected with the controllable rectifying module and used for controlling an output signal of the controllable rectifying module.
3. The rectifier of claim 2, wherein: the control power supply of the control unit can be from an external input control power supply.
4. The rectifier of claim 2, wherein: the control power supply of the control unit can come from the internal control power supply of the rectifier.
5. The rectifier of claim 4, wherein: the input end of the alternating current/direct current conversion module is connected with the input end of the alternating current power supply, the output end of the alternating current/direct current conversion module is connected with the anode of the first diode, the input end of the direct current/direct current conversion module is connected with the output end of the controllable rectification module, the output end of the direct current/direct current conversion module is connected with the anode of the second diode, and the cathodes of the first diode and the second diode are connected with the second input end of the control unit and used for providing an internal control power supply for the control unit.
6. The rectifier of claim 4, wherein: the direct current/direct current conversion module comprises a controllable rectification module, a first diode and a second diode, wherein the output end of the controllable rectification module is connected with the anode of the first diode, the output end of the rectification module is connected with the anode of the second diode, and the cathode of the first diode and the cathode of the second diode are connected to be used as the input of the direct current/direct current conversion module.
7. The rectifier of claim 6, wherein: the control unit is characterized by further comprising a direct current/direct current conversion module, cathodes of the first diode and the second diode are connected with an input end of the direct current/direct current conversion module, and an output end of the direct current/direct current conversion module is connected with a second input end of the control unit and used for providing an internal control power supply for the control unit.
8. The rectifier according to claim 6 or 7, wherein: the control signals of the at least two safety output switching-off control signal input interfaces are from safety chains or safety relay output signals.
9. A drive circuit, characterized by: comprising a rectifier according to any of claims 1-8.
10. A drive system for a textile machine, comprising: comprising a drive circuit according to claim 9 and a textile machine electrically connected to the drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010477298.0A CN111614246A (en) | 2020-05-29 | 2020-05-29 | Rectifier, drive circuit and system with safe direct current output stop function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010477298.0A CN111614246A (en) | 2020-05-29 | 2020-05-29 | Rectifier, drive circuit and system with safe direct current output stop function |
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| CN202010477298.0A Pending CN111614246A (en) | 2020-05-29 | 2020-05-29 | Rectifier, drive circuit and system with safe direct current output stop function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701992A (en) * | 2020-12-16 | 2021-04-23 | 上海三菱电梯有限公司 | Motor power supply system |
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2020
- 2020-05-29 CN CN202010477298.0A patent/CN111614246A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701992A (en) * | 2020-12-16 | 2021-04-23 | 上海三菱电梯有限公司 | Motor power supply system |
| CN112701992B (en) * | 2020-12-16 | 2022-12-20 | 上海三菱电梯有限公司 | Motor power supply system |
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