CN101369793A - Multi-machine synchronous operation DC speed control system - Google Patents
Multi-machine synchronous operation DC speed control system Download PDFInfo
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- CN101369793A CN101369793A CNA2008101990179A CN200810199017A CN101369793A CN 101369793 A CN101369793 A CN 101369793A CN A2008101990179 A CNA2008101990179 A CN A2008101990179A CN 200810199017 A CN200810199017 A CN 200810199017A CN 101369793 A CN101369793 A CN 101369793A
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Abstract
A multi-machine synchronous operation DC speed-regulating device is characterized in that including a speed-regulating device host and at least one speed-regulating device sub-unit, wherein the control signal output end of the speed-regulating device host is connected with the control signal input end of the speed-regulating device sub-unit. The beneficial effects of the invention comparing the existing technique is that a large-capacity dc electric machine can be replaced by two or more small-capacity dc electric machines, each of which runs with identical revolution speed or definite revolution speed rate, therefore cost being reduced greatly, use effect being good, and the improved DC electric machine speed-regulating device can ensure ample high control precision.
Description
Technical field
The present invention relates to a kind of multi-machine synchronous operation DC speed control system.
Background technology
Because the continuous expansion of scope of the enterprise, sugar refinery sugarcane daily squeezed quantity improves greatly, the squeezer capacity is also along with increase, when the motor single-machine capacity surpasses 1250kW, the motor selection difficulty is as adopting 6kV or 10kV high voltage motor, because the ac motor speed control characteristic is bad, high pressure speed control device technology is immature, and cost is also expensive.
Summary of the invention
The objective of the invention is prior art is improved, a kind of multi-machine synchronous operation DC speed control system is provided, can replace a jumbo direct current machine with the direct current machine of the low capacity more than two or two, the technical scheme of employing is as follows:
Multi-machine synchronous operation DC speed control system of the present invention is characterized in that: comprise speed regulating device main frame and at least one speed regulating device slave, the control signal output ends of speed regulating device main frame connects the signal input end of speed regulating device slave.The speed regulator main frame is by operations staff's set-point operation, send a signal to the speed regulating device slave simultaneously, make the speed regulating device slave follow the synchronization operation of speed regulating device main frame, on the speed regulating device main frame, can change the rotating speed ratio, make two direct current machines keep certain rotating ratio operation.
The control signal output ends of described speed regulating device main frame is connected by the RS232 interface with the signal input end of speed regulating device slave.The shortcoming of this mode is a poor anti jamming capability, and it is also very short to connect distance, and in order to guarantee the accuracy of signal, the distance of general speed regulating device main frame and speed regulating device slave at most can only one or two meter.
Another kind of scheme, the control signal output ends of described speed regulating device main frame is connected by optical fiber with the signal input end of speed regulating device slave.Employing optical fiber connects, and very strong antijamming capability is arranged, and it is also far to connect distance, can reach 2 kilometers farthest when adopting multimode fiber.
Described speed regulating device main frame and speed regulating device slave are improved dc motor drive.
Described improved dc motor drive comprises circuit breaker, reactor, AC-DC converter, controller, magnet exciting coil, motor, described circuit breaker, reactor, AC-DC converter, motor is connected successively, the input of described controller connects the circuit breaker output, first control signal output ends of controller connects the signal input end of circuit breaker, second control signal output ends of controller connects the signal input end of AC-DC converter, the 3rd control signal output ends of controller connects magnet exciting coil, the current detection signal input of controller, alternating voltage detection signal input all connects the output of reactor, and the direct voltage detection signal input of controller connects the output of AC-DC converter.
Above-mentioned speed control has adopted the armature voltage feedback, has the IR compensation, also can adopt encoder feedback or simulation tachogenerator feedback, to reach higher precision.Corresponding stable state accuracy: encoder feedback is 0.01%, and the simulation velometer is fed back to 0.1%, and Voltage Feedback is 2%.Circuit breaker has short-circuit protection and overcurrent protection, and is equipped with interchange resistance-capacitance protection loop, and to suppress transient over-voltage, thyristor is equipped with resistance-capacitance protection, and each thyristor serial connection fast acting fuse is made short-circuit protection.
Described magnet exciting coil has the voltage control mode of closed loop current control mode and open loop.Motor is constant torque speed control mode by zero-speed to base speed (rotating speed of the maximum output that motor designs is good), is the constant-power speed regulation mode more than the base speed.
Described AC-DC converter is full control three-phase thyristor bridge.Owing to adopted the three-phase fully-controlled thyristor bridge, AC power that therefore can frequency of utilization 45～65Hz, and insensitive to the phase place rotation.
Be provided with the excitation regulation module in the described controller, the excitation regulation module comprises the single-phase thyristor bridge of all-wave half control with instantaneous protection and overload protection function.Use the difference of selected operational mode according to fixed torque, send into the electric current of the input of controller, provide fixed voltage or fixed current source to magnet exciting coil by the excitation regulation module from the circuit breaker output.Like this, can further improve the operational mode of exciting current, provide the excitation reduction thereby control motor for the speed regulator that need further carry out the control of speed or constant horsepower.
The present invention's beneficial effect against existing technologies is, can make the direct current machine of two or two above low capacities replace a jumbo direct current machine, also be applicable to the occasion that requires multi-machine interaction on the technology, the direct current machine of each low capacity is with identical rotating speed operation, or by certain rotating ratio operation, can significantly reduce cost like this, result of use is good, can also realize the function that the separate unit motor is not realized in some occasion.And adopt improved dc motor drive, can guarantee sufficiently high control precision.
Description of drawings
Fig. 1 is the schematic block circuit diagram of the preferred embodiment of the present invention;
Fig. 2 is the schematic block circuit diagram of preferred embodiment speed regulating device main frame shown in Figure 1;
Fig. 3 is the schematic block circuit diagram of preferred embodiment speed regulating device slave shown in Figure 1.
Embodiment
As Figure 1-3, the multi-machine synchronous operation DC speed control system in this preferred embodiment comprises speed regulating device main frame 1 and a speed regulating device slave 2, and the control signal output ends of speed regulating device main frame 1 connects the signal input end of speed regulating device slave 2.The control signal output ends of described speed regulating device main frame 1 is connected by optical fiber 3 with the signal input end of speed regulating device slave 2.Adopt optical fiber 3 to connect, very strong antijamming capability is arranged, it is also far to connect distance, can reach 2 kilometers farthest when adopting multimode fiber.Speed regulator main frame 1 is by operations staff's set-point operation, send a signal to speed regulating device slave 2 simultaneously, make speed regulating device slave 2 follow the synchronization operation of speed regulating device main frame 1, on speed regulating device slave 2, can change the rotating speed ratio of the direct current machine of the direct current machine of speed regulating device slave 2 and speed regulating device main frame 1, make two direct current machines keep certain rotating ratios operation.
Described speed regulating device main frame 1 and speed regulating device slave 2 are improved dc motor drive.
Speed regulating device main frame 1 comprises circuit breaker 11, reactor 12, AC-DC converter 13, controller 15, magnet exciting coil 16, motor 14, described circuit breaker 11, reactor 12, AC-DC converter 13, motor 14 is connected successively, the input 1505 of controller 15 connects circuit breaker 11 outputs, first control signal output ends 1504 of controller 15 connects the signal input end of circuit breaker 11, second control signal output ends 1506 of controller 15 connects the signal input end of AC-DC converter 13, the 3rd control signal output ends 1507 of controller 15 connects magnet exciting coil 16, the current detection signal input 1501 of controller 15, alternating voltage detection signal input 1502 all connects the output of reactor 12, and the direct voltage detection signal input 1503 of controller 15 connects the output of AC-DC converter 13.
Speed regulating device slave 2 comprises circuit breaker 21, reactor 22, AC-DC converter 23, controller 25, magnet exciting coil 26, motor 24, described circuit breaker 21, reactor 22, AC-DC converter 23, motor 24 is connected successively, the input 2505 of controller 25 connects circuit breaker 21 outputs, first control signal output ends 2504 of controller 25 connects the signal input end of circuit breaker 21, second control signal output ends 2506 of controller 25 connects the signal input end of AC-DC converter 23, the 3rd control signal output ends 2507 of controller 25 connects magnet exciting coil 26, the current detection signal input 2501 of controller 25, alternating voltage detection signal input 2502 all connects the output of reactor 22, and the direct voltage detection signal input 2503 of controller 25 connects the output of AC-DC converter 23.
The speed control of above-mentioned improved dc motor drive has adopted the armature voltage feedback, has the IR compensation, also can adopt encoder feedback or simulation tachogenerator feedback, to reach higher precision.
Described magnet exciting coil 16, magnet exciting coil 26 all have the voltage control mode of closed loop current control mode and open loop.
Described AC-DC converter 13, AC-DC converter 23 are full control three-phase thyristor bridge.
Be equipped with the excitation regulation module in described controller 15, the controller 25, the excitation regulation module comprises the single-phase thyristor bridge of all-wave half control with instantaneous protection and overload protection function.
Claims (8)
1. a multi-machine synchronous operation DC speed control system is characterized in that: comprise speed regulating device main frame and at least one speed regulating device slave, the signal input end of the control signal output ends connection speed regulating device slave of speed regulating device main frame.
2. multi-machine synchronous operation DC speed control system as claimed in claim 1 is characterized in that: the control signal output ends of described speed regulating device main frame is connected by the RS232 interface with the signal input end of speed regulating device slave.
3. multi-machine synchronous operation DC speed control system as claimed in claim 1 is characterized in that: the control signal output ends of described speed regulating device main frame is connected by optical fiber with the signal input end of speed regulating device slave.
4. multi-machine synchronous operation DC speed control system as claimed in claim 1 is characterized in that: described speed regulating device main frame and speed regulating device slave are improved dc motor drive.
5. multi-machine synchronous operation DC speed control system as claimed in claim 4, it is characterized in that: described improved dc motor drive comprises circuit breaker, reactor, AC-DC converter, controller, magnet exciting coil, motor, described circuit breaker, reactor, AC-DC converter, motor is connected successively, the input of described controller connects the circuit breaker output, first control signal output ends of controller connects the signal input end of circuit breaker, second control signal output ends of controller connects the signal input end of AC-DC converter, the 3rd control signal output ends of controller connects magnet exciting coil, the current detection signal input of controller, alternating voltage detection signal input all connects the output of reactor, and the direct voltage detection signal input of controller connects the output of AC-DC converter.
6. multi-machine synchronous operation DC speed control system as claimed in claim 5 is characterized in that: described magnet exciting coil has the voltage control mode of closed loop current control mode and open loop.
7. multi-machine synchronous operation DC speed control system as claimed in claim 5 is characterized in that: described AC-DC converter is full control three-phase thyristor bridge.
8. multi-machine synchronous operation DC speed control system as claimed in claim 5 is characterized in that: be provided with the excitation regulation module in the described controller, the excitation regulation module comprises the single-phase thyristor bridge of all-wave half control with instantaneous protection and overload protection function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101990179A CN101369793B (en) | 2008-10-08 | 2008-10-08 | Multi-machine synchronous operation DC speed control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101990179A CN101369793B (en) | 2008-10-08 | 2008-10-08 | Multi-machine synchronous operation DC speed control system |
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| CN101369793A true CN101369793A (en) | 2009-02-18 |
| CN101369793B CN101369793B (en) | 2010-07-14 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383689A (en) * | 2011-09-29 | 2012-03-21 | 鲁文杰 | Synchronous control system of motor-driven window opener |
| CN105116815A (en) * | 2015-09-29 | 2015-12-02 | 上海十贝电子科技有限公司 | Cascaded trigger |
| CN107627906A (en) * | 2017-09-08 | 2018-01-26 | 中国船舶重工集团公司第七〇二研究所 | A kind of railway contact line overlap formula electricity segmentation arc suppressing means and its method |
| CN109243758A (en) * | 2018-11-12 | 2019-01-18 | 宁波兴隆磁性技术有限公司 | Linkage formula magnetizes unit |
| CN113595321A (en) * | 2021-09-28 | 2021-11-02 | 南京桓骥科技有限公司 | But motor of self adjustable rotational speed quick replacement gear |
-
2008
- 2008-10-08 CN CN2008101990179A patent/CN101369793B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383689A (en) * | 2011-09-29 | 2012-03-21 | 鲁文杰 | Synchronous control system of motor-driven window opener |
| CN105116815A (en) * | 2015-09-29 | 2015-12-02 | 上海十贝电子科技有限公司 | Cascaded trigger |
| CN107627906A (en) * | 2017-09-08 | 2018-01-26 | 中国船舶重工集团公司第七〇二研究所 | A kind of railway contact line overlap formula electricity segmentation arc suppressing means and its method |
| CN109243758A (en) * | 2018-11-12 | 2019-01-18 | 宁波兴隆磁性技术有限公司 | Linkage formula magnetizes unit |
| CN113595321A (en) * | 2021-09-28 | 2021-11-02 | 南京桓骥科技有限公司 | But motor of self adjustable rotational speed quick replacement gear |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101369793B (en) | 2010-07-14 |
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