CN203433323U - Direct-current power supply asynchronous parallel digital control system - Google Patents
Direct-current power supply asynchronous parallel digital control system Download PDFInfo
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- CN203433323U CN203433323U CN201320572425.0U CN201320572425U CN203433323U CN 203433323 U CN203433323 U CN 203433323U CN 201320572425 U CN201320572425 U CN 201320572425U CN 203433323 U CN203433323 U CN 203433323U
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Abstract
The utility model relates to a direct-current power supply asynchronous parallel digital control system comprising a monitoring system and N direct-current power supply modules, wherein the N is larger than or equal to 2. The monitoring system includes a DSP control circuit, a serial communication circuit, a man-machine interaction device, an asynchronous control circuit and a feedback circuit; and the DSP control circuit is respectively connected with the serial communication circuit, the man-machine interaction device, the asynchronous control circuit and the asynchronous control circuit. With the direct-current power supply asynchronous parallel digital control system, asynchronous organized work of multiple power supply modules can be realized according to demands, an output waveform of parallel connection can be controlled actually, and constant-voltage, constant-current or constant-power controlling of the power supply system can be realized rapidly. The system has the advantages of simple process, little wiring, and convenient repairing and the like. The control method employs the digital control method; the operation is simple; and the control is reliable. The dynamic performance of the system is substantially improved in a constant-voltage mode. And the system can be directly applied to a digital direct-current power supply parallel system.
Description
Technical field
The utility model relates to industrial high-power direct-current switch power source, is specifically related to the asynchronous digital control system in parallel of direct supply.
Background technology
At present, in many industries, the demand of various large power supplies increases day by day, especially the demand of some high-power DC power supplies.But, DC power supplier finite capacity, the normal multiple module paralleling that adopts moves, its output energy is the several times of module output, improved the power grade of direct supply, multiple module paralleling work simultaneously makes system have certain redundance, and module failure can not affect the normal operation of this system, makes the reliability of whole system have large increase.Multiple module paralleling operation not only makes direct supply have larger power and reliability, but also has good versatility, and flexible combination becomes the system of various power as required.But most of high-power DC power supply of multiple module paralleling operation at present all adopts the hard parallel running pattern of constant current, be difficult to realize the asynchronous orderly work of modular power source, cause output waveform stack, output voltage or current spike are higher, are difficult to meet Precision Machining demand.
Utility model content
In order to solve the problem of existing high-power DC power supply parallel running, the asynchronous digital control system in parallel of direct supply has been proposed.The asynchronous digital control system in parallel of direct supply of the present utility model can be realized the asynchronous orderly work of many DC power supplier as required, truly controls output waveform in parallel, realizes fast constant voltage, constant current or the permanent power of power-supply system and controls; Have that technique is simple, wiring is few, be beneficial to the advantages such as maintenance; Its control method adopts Digital Control, simple to operate, controls reliably, and when constant voltage mode, dynamic performance improves greatly, can directly apply in Digital DC power supply parallel system.
The utility model is achieved by following proposal:
The asynchronous digital control system in parallel of direct supply, comprises supervisory system and N platform DC power supplier, N >=2; Described supervisory system comprises DSP control circuit, serial communication circuit, human-computer interaction device, asynchronous control circuit and feedback circuit; Described DSP control circuit is connected with serial communication circuit, human-computer interaction device, asynchronous control circuit and feedback circuit respectively; Described serial communication circuit is for realizing communicating by letter between DSP control circuit and N platform DC power supplier; Described human-computer interaction device is for arranging and show the output parameter of N platform DC power supplier; Described asynchronous control circuit sends the uniform synchronizing signal in interval to corresponding DC power supplier at the PWM of each DC power supplier control cycle, and described feedback circuit is used for feeding back working current and the output voltage of each DC power supplier.
Each described DC power supplier includes main power circuit, control circuit, serial communication interface unit and output feedback circuit; Described control circuit is connected with main power circuit, serial communication interface unit and output feedback circuit respectively, and control circuit can be selected TI2000 series DSP, for controlling function and the power stage of DC power supplier, controls; Main power circuit comprises three phase rectifier filtering circuit, high-frequency inverter circuit and the output rectifier and filter connecting in turn, and three phase rectifier filtering circuit input end is connected with three-phase supply, and output rectifier and filter output terminal is connected with load; Output feedback circuit is connected with output rectifier and filter, and is also connected with the feedback circuit in supervisory system.
The serial communication circuit of described supervisory system comprises RS485 and CAN communicating circuit; Described RS485 communicating circuit is connected to each DC power supplier, is used for transmitting the operation information (output current, the output voltage that comprise DC power supplier) of DC power supplier; CAN communicating circuit is also connected to each DC power supplier, is used for the control information (comprise supervisory system to the information such as startup control, output state and amplitude control of N platform DC power supplier) of transmission monitor system to DC power supplier.
The asynchronous control circuit of described supervisory system is comprised of the output of multichannel optocoupler, and its optocoupler can preferentially be selected high speed photo coupling, for example 6N137 and 6N136; The pwm signal of the DSP of asynchronous control circuit in DSP control circuit is as signal source, produce multichannel with the pwm signal output of out-phase frequently, by asynchronous control circuit, output to each DC power supplier, control each DC power supplier PWM control cycle, make each DC power supplier each other with out-phase work frequently.
The feedback circuit of described supervisory system is comprised of output current feedback circuit and the output voltage feedback circuit of DC power supplier, N platform DC power supplier feedback circuit feeds back real work electric current and the voltage of each DC power supplier, the current feedback circuit of DC power supplier and output voltage feedback circuit are preferentially selected linear optical coupling, can adopt the devices such as HCPL7840 or HCNR200 to complete.
The control circuit of each DC power supplier adopts dsp chip, and described DC power supplier is controlled by dsp chip, and dsp chip has PWM synchronizing signal input pin, and input pin is connected to the asynchronous control circuit of supervisory system by photoelectrical coupler.As preferably, DSP control circuit adopts the dsp chip of TI2000 series, and it has the current signal feedback that 16 tunnel simulating signal inputs can meet N platform DC power supplier; And there is the pwm signal output of 12-16 road, can realize easily asynchronous signal output.
The asynchronous digital control system in parallel of described direct supply, its whole control method is: described supervisory system is sent the system order that powers on by the CAN bus of serial communication circuit, N platform DC power supplier is received after this CAN bus line command, RS485 bus by serial communication circuit is replied and is registered, described supervisory system obtains the information of every DC power supplier according to RS485 bus, and sequentially arrange synchronizing signal by the DC power supplier information receiving, by asynchronous control circuit, control the pwm signal of each DC power supplier; In order to make pwm signal cycle of DC power supplier of work in asynchronous mode, after startup work, by the DC power supplier working current of dsp chip sampling feedback circuit feedback, obtain the total working electric current of system, the output voltage of the system that sampling feedback circuit feeds back again, thereby constant current, constant voltage or the permanent power of realizing system are controlled, and the control cycle of its system is determined by the speed of the collection of simulant signal speed of DSP and the order of CAN bus transmission.The dsp chip picking rate of preferred TI2000 series reaches 10M.CAN communication speed reaches 1M, and the controlled frequency that considers system meets present industrial applications requirement more than can reaching 10KHz substantially.
With respect to present multiple module paralleling direct supply and control method thereof, the beneficial effects of the utility model are:
1, well solved the unordered control model of multiple module paralleling direct supply.
2, multiple module paralleling direct supply adopts serial communication, and technique is simple, and connecting line is few, is convenient to production maintenance.
3, control method is simple and reliable, and system control cycle is extremely short, and dynamic property improves greatly, can directly apply in Digital DC power supply parallel system.
Accompanying drawing explanation
Fig. 1 is the asynchronous digital control system in parallel of the direct supply in embodiment and control method structured flowchart thereof.
Fig. 2 is the direct current power module structure schematic diagram in embodiment.
Fig. 3 is the schematic diagram of the asynchronous signal in embodiment.
Embodiment
Below in conjunction with concrete enforcement, the utility model is described further.
As shown in Figure 1, be the asynchronous digital control system in parallel of the direct supply in embodiment and control method structured flowchart thereof, the asynchronous parallel control system of this direct supply comprises supervisory system 101 and N platform DC power supplier 102, N >=2; Described supervisory system 101 comprises DSP control circuit, serial communication circuit, human-computer interaction device, asynchronous control circuit and feedback circuit; Described DSP control circuit is connected with serial communication circuit, human-computer interaction device, asynchronous control circuit and feedback circuit respectively; Described serial communication circuit is for realizing communicating by letter between DSP control circuit and N platform DC power supplier; Described human-computer interaction device is for arranging and show the output parameter of N platform DC power supplier; Described asynchronous control circuit sends the uniform synchronizing signal in interval to corresponding DC power supplier at the PWM of each DC power supplier control cycle, and described feedback circuit is used for feeding back working current and the output voltage of each DC power supplier.
As shown in Figure 2, be the direct current power module structure schematic diagram in embodiment, DC power supplier includes main power circuit 103, control circuit 104, output feedback circuit 105 and serial communication interface unit 106; Described control circuit 104 is connected with main power circuit 103, serial communication interface unit 106 and output feedback circuit 105 respectively, and control circuit 104 can be selected TI2000 series DSP, for controlling function and the power stage of DC power supplier, controls; Main power circuit 103 comprises three phase rectifier filtering circuit, high-frequency inverter circuit and the output rectifier and filter connecting in turn, and three phase rectifier filtering circuit input end is connected with three-phase supply, and output rectifier and filter output terminal is connected with load; Output feedback circuit 105 is also connected with output rectifier and filter, and is also connected with the feedback circuit in supervisory system.
The serial communication circuit of described supervisory system 101 comprises RS485 and CAN communicating circuit; Described RS485 communicating circuit is connected to each DC power supplier, is used for transmitting the operation information (output current, the output voltage that comprise DC power supplier) of DC power supplier; CAN communicating circuit is also connected to each DC power supplier, is used for the control information (comprise supervisory system to the information such as startup control, output state and amplitude control of N platform DC power supplier) of transmission monitor system to DC power supplier.
The asynchronous control circuit of described supervisory system 101 is comprised of the output of multichannel optocoupler, and its optocoupler can preferentially be selected high speed photo coupling, for example 6N137 and 6N136; The pwm signal of the DSP of asynchronous control circuit in DSP control circuit is as signal source, produce multichannel with the pwm signal output of out-phase frequently, as shown in Figure 3, by asynchronous control circuit, output to each DC power supplier, control each DC power supplier PWM control cycle, make DC power supplier each other with out-phase work frequently.
The feedback circuit of described supervisory system 101 is comprised of output current feedback circuit and the output voltage feedback circuit of DC power supplier, DC power supplier feedback circuit feeds back real work electric current and the voltage of each DC power supplier, the current feedback circuit of DC power supplier and output voltage feedback circuit are preferentially selected linear optical coupling, can adopt the devices such as HCPL7840 or HCNR200 to complete.
The dsp chip of the DSP control circuit of described supervisory system 101 has PWM synchronizing signal input pin, and input pin is connected to the asynchronous control circuit of supervisory system 101 by photoelectrical coupler.As preferably, DSP control circuit adopts the dsp chip of TI2000 series, and it has the current signal feedback that 16 tunnel simulating signal inputs can meet N platform DC power supplier; And there is the pwm signal output of 12-16 road, can realize easily asynchronous signal output.
The asynchronous digital control system in parallel of described direct supply, its whole control method is: described supervisory system 101 is sent the system order that powers on by the CAN bus of serial communication circuit, N platform DC power supplier 102 is received after this CAN bus line command, RS485 bus by serial communication circuit is replied and is registered, described supervisory system 101 obtains the information of every DC power supplier according to RS485 bus, and sequentially arrange synchronizing signal by the DC power supplier information receiving, by asynchronous control circuit, control the pwm signal of each DC power supplier; In order to make pwm signal cycle of DC power supplier of work in asynchronous mode, after startup work, by the DC power supplier working current of dsp chip sampling feedback circuit feedback, obtain the total working electric current of system, the output voltage of the system that sampling feedback circuit feeds back again, thereby constant current, constant voltage or the permanent power of realizing system are controlled, and the control cycle of its system is determined by the speed of the collection of simulant signal speed of DSP and the order of CAN bus transmission.The dsp chip picking rate of preferred TI2000 series reaches 10M.CAN communication speed reaches 1M, and the controlled frequency that considers system meets present industrial applications requirement more than can reaching 10KHz substantially.
Specific embodiment described herein is only illustrating the utility model spirit; those skilled in the art can make various modifications to this specific embodiment or supplement or adopt similar mode to substitute under the prerequisite without prejudice to principle of the present utility model and essence, but these changes all fall into protection domain of the present utility model.Therefore the utility model technical scope is not limited to above-described embodiment.
Claims (6)
1. the asynchronous digital control system in parallel of direct supply, is characterized in that: comprise supervisory system and N platform DC power supplier, N >=2; Described supervisory system comprises DSP control circuit, serial communication circuit, human-computer interaction device, asynchronous control circuit and feedback circuit; Described DSP control circuit is connected with serial communication circuit, human-computer interaction device, asynchronous control circuit and feedback circuit respectively; Described serial communication circuit is for realizing communicating by letter between DSP control circuit and N platform DC power supplier; Described human-computer interaction device is for arranging and show the output parameter of N platform DC power supplier; Described asynchronous control circuit sends the uniform synchronizing signal in interval to corresponding DC power supplier at the PWM of each DC power supplier control cycle, and described feedback circuit is for feeding back working current and the output voltage of each DC power supplier.
2. the asynchronous digital control system in parallel of direct supply according to claim 1, is characterized in that: each DC power supplier includes main power circuit, control circuit, serial communication interface unit and output feedback circuit; Described control circuit is connected with main power circuit, serial communication interface unit and output feedback circuit respectively; Main power circuit comprises three phase rectifier filtering circuit, high-frequency inverter circuit and the output rectifier and filter connecting in turn, and three phase rectifier filtering circuit input end is connected with three-phase supply, and output rectifier and filter output terminal is connected with load; Output feedback circuit is connected with output rectifier and filter, and is also connected with the feedback circuit in supervisory system.
3. the asynchronous digital control system in parallel of direct supply according to claim 1, is characterized in that: the serial communication circuit of described supervisory system comprises RS485 and CAN communicating circuit; Described RS485 telecommunication circuit is connected to each DC power supplier, is used for transmitting the operation information of DC power supplier; CAN communicating circuit is also connected to each DC power supplier, is used for transmission monitor system to the control information of DC power supplier.
4. according to the asynchronous digital control system in parallel of direct supply described in claim 1, it is characterized in that: the asynchronous control circuit of described supervisory system is comprised of the output of multichannel optocoupler; The pwm signal of the DSP of asynchronous control circuit in DSP control circuit is as signal source, produce multichannel with the pwm signal output of out-phase frequently, by asynchronous control circuit, output to each DC power supplier, control each DC power supplier PWM control cycle, make each DC power supplier each other with out-phase work frequently.
5. according to the asynchronous digital control system in parallel of direct supply described in claim 1, it is characterized in that: the feedback circuit of described supervisory system is comprised of output current feedback circuit and the output voltage feedback circuit of DC power supplier, and DC power supplier feedback circuit feeds back real work electric current and the voltage of each DC power supplier.
6. the asynchronous digital control system in parallel of direct supply according to claim 1, it is characterized in that: the control circuit of each DC power supplier adopts dsp chip, described DC power supplier is controlled by dsp chip, dsp chip has PWM synchronizing signal input pin, and input pin is connected to the asynchronous control circuit of supervisory system by photoelectrical coupler.
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| CN201320572425.0U CN203433323U (en) | 2013-09-16 | 2013-09-16 | Direct-current power supply asynchronous parallel digital control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103631177A (en) * | 2013-09-16 | 2014-03-12 | 华南理工大学 | Direct-current power supply asynchronous parallel digital control system and control method thereof |
| WO2015135375A1 (en) * | 2014-03-13 | 2015-09-17 | 刘晓霖 | Parallel rapid control system for switch power sources based on double communication ports |
-
2013
- 2013-09-16 CN CN201320572425.0U patent/CN203433323U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103631177A (en) * | 2013-09-16 | 2014-03-12 | 华南理工大学 | Direct-current power supply asynchronous parallel digital control system and control method thereof |
| WO2015135375A1 (en) * | 2014-03-13 | 2015-09-17 | 刘晓霖 | Parallel rapid control system for switch power sources based on double communication ports |
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Granted publication date: 20140212 Termination date: 20200916 |