CN104734584A - Synchronous motor braking circuit, braking system and braking method - Google Patents
Synchronous motor braking circuit, braking system and braking method Download PDFInfo
- Publication number
- CN104734584A CN104734584A CN201310714228.2A CN201310714228A CN104734584A CN 104734584 A CN104734584 A CN 104734584A CN 201310714228 A CN201310714228 A CN 201310714228A CN 104734584 A CN104734584 A CN 104734584A
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- Prior art keywords
- synchronous machine
- circuit
- signal
- brake
- frequency converter
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/24—Arrangements for stopping
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stopping Of Electric Motors (AREA)
Abstract
The invention provides a synchronous motor braking circuit, a braking system and a braking method. The synchronous motor braking circuit comprises a frequency converter (10) and an energy consumption braking circuit, wherein the frequency converter (10) is connected with a synchronous motor (30), and the energy consumption braking circuit is connected to the synchronous motor (30), arranged with the frequency converter (10) in parallel and used for controlling the braking of a rotor of the synchronous motor (30); the synchronous motor (30) has a working state of being electrically connected with the frequency converter (10) and a braking state of being electrically connected with the energy consumption braking circuit. By means of the synchronous motor braking circuit, the problems that in the prior art, the braking cost of a rotor of a synchronous motor is high, and the structure of the rotor is complex are solved.
Description
Technical field
The present invention relates to motor braking field, in particular to a kind of synchronous machine braking circuit, braking system and braking method.
Background technology
Compressor is emergency shutdown in abnormal cases, and rotor can be rotated further in the effect of inertia, now, can cause damage if rotor can not stop operating at once to compressor and governing system.
The mode of braking rotor in prior art is implement braking at frequency converter end, needs to increase brake unit, and the bridge circuit needing diode to form, not only cost is higher, and structure is also comparatively complicated.
Summary of the invention
The present invention aims to provide a kind of synchronous machine braking circuit, braking system and braking method, the problem that higher and structure is also comparatively complicated with the rotor brake cost solving synchronous machine in prior art.
To achieve these goals, according to an aspect of the present invention, provide a kind of synchronous machine braking circuit, comprising: frequency converter, be electrically connected with synchronous machine; Energy-dissipating brake circuit, is connected to synchronous machine, and is arranged in parallel with frequency converter, for the rotor brake of control synchronization motor; Synchronous machine has the operating state be electrically connected with frequency converter and the on-position be electrically connected with energy-dissipating brake circuit.
Further, energy-dissipating brake circuit comprises heating resistor, and the three phase supply circuit of synchronous machine is respectively arranged with heating resistor, and the power supply circuits arbitrarily between two-phase form loop.
Further, the circuit at each heating resistor place is provided with switch.
According to a further aspect in the invention, provide a kind of synchronous machine braking system, apply above-mentioned synchronous machine braking circuit, synchronous machine braking system comprises: checkout gear, detects brake signal; Control device, when checkout gear detects brake signal, the connecting circuit of control synchronization motor is switched to energy-dissipating brake circuit from frequency converter, and control synchronization motor stalling.
Further, checkout gear is simultaneously for detecting the fault type of synchronous machine braking system place equipment, and synchronous machine braking system also comprises the display unit of the failure code for showing fault type.
According to a further aspect in the invention, provide a kind of synchronous machine braking method, comprising: detect brake signal; When brake signal being detected, the connecting circuit of control synchronization motor is switched to energy-dissipating brake circuit from frequency converter, makes synchronous machine stall.
Further, the step detecting brake signal comprises: detect emergent stop signal or fault-signal; When emergent stop signal or fault-signal being detected, confirm brake signal to be detected.
Further, brake signal comprises: manual emergent stop signal, frequency converter failure guard signal, the stuck signal of compressor, vibration of compressor abnormal signal, voltage ripple of power network signal and motor temperature exceed standard signal.
Further, energy-dissipating brake circuit comprises heating resistor, and the three phase supply circuit of synchronous machine is respectively arranged with heating resistor, and the power supply circuits arbitrarily between two-phase form loop.
Further, also comprise after the step making synchronous machine stall: after the stall of detection synchronous machine, the connecting circuit of control synchronization motor switches to frequency converter from energy-dissipating brake circuit, and sends safety signal.
Further, when brake signal being detected, the step that the connecting circuit of control synchronization motor is switched to energy-dissipating brake circuit from frequency converter also comprises: when brake signal being detected, controls display unit display failure code.
Apply technical scheme of the present invention, synchronous machine braking circuit comprises: frequency converter, is electrically connected with synchronous machine; Energy-dissipating brake circuit, is connected to synchronous machine, and is arranged in parallel with frequency converter, for the rotor brake of control synchronization motor; Synchronous machine has the operating state be electrically connected with frequency converter and the on-position be electrically connected with energy-dissipating brake circuit.Apply technical scheme of the present invention; can when brake hards such as compressors; control synchronization motor is communicated with energy-dissipating brake circuit; and control synchronization motor and frequency converter disconnect; the moment of inertia of the rotor of synchronous machine is consumed by energy-dissipating brake circuit; fast braking is formed to the rotor of synchronous machine; and protect frequency converter can not be impaired due to the moment of inertia of rotor; just braking can be formed to synchronous machine easily owing to only adopting energy-dissipating brake circuit; therefore can reduce the rotor brake cost of synchronous machine, and simplify the brake structure of synchronous machine.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the structural representation of synchronous machine braking circuit according to an embodiment of the invention;
Fig. 2 shows the structural representation of synchronous machine braking system according to an embodiment of the invention; And
Fig. 3 shows synchronous machine braking flow chart according to an embodiment of the invention.
Reference numeral: 10, frequency converter; 20, heating resistor; 30, synchronous machine; 40, switch.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
As shown in Figure 1, according to embodiments of the invention, synchronous machine braking circuit comprises frequency converter 10 and energy-dissipating brake circuit, and frequency converter 10 is electrically connected with synchronous machine 30, for the operating frequency of control synchronization motor 30; Energy-dissipating brake circuit is connected to synchronous machine 30, and is arranged in parallel with frequency converter 10, for the rotor brake of control synchronization motor 30; Synchronous machine 30 has the operating state be electrically connected with frequency converter 10 and the on-position be electrically connected with energy-dissipating brake circuit.
When the work and the braking that use synchronous machine braking circuit control synchronization motor 30 of the present invention, can when equipment brake hards such as compressors, control synchronization motor 30 is communicated with energy-dissipating brake circuit, and control synchronization motor 30 and frequency converter 10 disconnect, the moment of inertia of the rotor of synchronous machine 30 is consumed by energy-dissipating brake circuit, fast braking is formed to the rotor of synchronous machine 30, and protect frequency converter 10 can not be impaired due to the moment of inertia of rotor by the mode of connection disconnected between frequency converter 10, just braking can be formed to synchronous machine 30 easily owing to only adopting energy-dissipating brake circuit, therefore the rotor brake cost of synchronous machine 30 can be reduced, and simplify the brake structure of synchronous machine 30.
In the present embodiment, energy-dissipating brake circuit comprises heating resistor 20, and the three phase supply circuit of synchronous machine 30 is respectively arranged with heating resistor 20, and the power supply circuits arbitrarily between two-phase form loop.The first end of three heating resistors 20 is connected on the power supply circuits of corresponding phase of synchronous machine 30 respectively, and the second end of three heating resistors 20 has a common connection end, and the second end of three heating resistors 20 is interconnected.Heating resistor 20 also can be the dynamic braking element of other type.
The circuit at each heating resistor 20 place is provided with switch 40, specifically, the circuit that each heating resistor 20 is connected to synchronous machine 30 is respectively arranged with K1, K2 and K3 tri-switches, is respectively used to control the connecting and disconnecting of the circuit between each heating resistor 20 and synchronous machine 30.In the present embodiment, the opening and closing of three switches is undertaken automatically controlled by control device.
Owing to being provided with the energy-dissipating brake circuit in parallel with frequency converter 10 in the present embodiment, therefore the moment of inertia of motor is when being fallen without any need for when auxiliary equipment by the components consume such as heating resistor 20 dynamic braking such as grade on energy-dissipating brake circuit, need not think that conventional braking circuit is such, need to implement braking at frequency converter end, and the bridge circuit needing diode to form, therefore structure is more simple, also can effectively reduce costs.
In conjunction with shown in Figure 2, according to embodiments of the invention, synchronous machine braking system applies above-mentioned synchronous machine braking circuit, and synchronous machine braking system comprises checkout gear and control device, and checkout gear detects brake signal; Control device is when checkout gear detects brake signal, and the connecting circuit of control synchronization motor 30 is switched to energy-dissipating brake circuit from frequency converter 10, and control synchronization motor 30 stall.
When synchronous machine 30 normally works, control device controls frequency converter 10 and is all communicated with three K switch 4, K5, K6 between synchronous machine 30, then can control frequency converter 10 as required by control device and carry out frequency conversion, thus the operating frequency of control synchronization motor 30.When the rotor brake hard needing synchronous machine 30 being detected, then operating control device makes the circuit between frequency converter 10 and synchronous machine 30 disconnect, then make synchronous machine 30 be communicated with between energy-dissipating brake circuit, dynamic braking is carried out to the rotor of synchronous machine 30.
Preferably, checkout gear is simultaneously for detecting the fault type of synchronous machine braking system place equipment, and synchronous machine braking system also comprises the display unit of the failure code for showing fault type.By display fault type, can quick obtaining failure cause, to take corresponding measure in time.
In conjunction with shown in Figure 3, according to embodiments of the invention, synchronous machine braking method comprises: detect brake signal; When brake signal being detected, the connecting circuit of control synchronization motor 30 is switched to energy-dissipating brake circuit from frequency converter 10, makes synchronous machine 30 stall.
The step detecting brake signal comprises: detect whether receive emergent stop signal or fault-signal; When emergent stop signal or fault-signal being detected, confirm to receive brake signal.
In the present embodiment, brake signal comprises: manual emergent stop signal, frequency converter 10 error protection signal, the stuck signal of compressor, vibration of compressor abnormal signal, voltage ripple of power network signal and motor temperature exceed standard signal.Above-mentioned signal is for the determined signal kinds of compressor, and for different equipment, the kind of brake signal also can correspondingly change.
Energy-dissipating brake circuit comprises heating resistor 20, and the three phase supply circuit of synchronous machine 30 is respectively arranged with heating resistor 20, and the power supply circuits arbitrarily between two-phase form loop.
Also comprise after the step making synchronous machine 30 stall: after the stall of detection synchronous machine 30, the connecting circuit of control synchronization motor 30 switches to frequency converter 10 from energy-dissipating brake circuit, and sends safety signal.
When brake signal being detected, the step that the connecting circuit of control synchronization motor 30 is switched to energy-dissipating brake circuit from frequency converter 10 also comprises: when brake signal being detected, controls display unit display failure code.
In synchronous machine 30 course of work; control device meeting receiving equipment run signal; for compressor; by checkout gear, control device comes whether checkout equipment sends manual emergent stop signal, frequency converter failure guard signal, the stuck signal of compressor, vibration of compressor abnormal signal, voltage ripple of power network signal, motor temperature check meter signal etc.; after above-mentioned signal being detected; control device can suddenly stop by control synchronization motor 30, and shows failure code on the display apparatus.In the control synchronization motor 30 anxious stopping time, control device controls to disconnect between frequency converter 10 and synchronous machine 30, controls energy-dissipating brake circuit and realizes between synchronous machine 30 being communicated with simultaneously, braked by the rotor of energy-dissipating brake circuit to synchronous machine 30.After the rotor of synchronous machine 30 stops operating, feedback signal is to control device, this timed unit sends instruction, control synchronization motor 30 is communicated with frequency converter 10, disconnect simultaneously and between energy-dissipating brake circuit, after complete operation, control device controls green indicating lamp etc. and sends safety signal, completes the rotor brake operation of synchronous machine 30.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
1, the fast braking to synchronous electric motor rotor can be realized.
2, can available protecting frequency converter by synchronous electric motor rotor rotate damage.
3, realize braking by energy-dissipating brake circuit in parallel with frequency converter, circuit structure is more simple, and brake convenient, cost is lower.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a synchronous machine braking circuit, is characterized in that, comprising:
Frequency converter (10), is electrically connected with described synchronous machine (30);
Energy-dissipating brake circuit, is connected to described synchronous machine (30), and is arranged in parallel with described frequency converter (10), for controlling the rotor brake of described synchronous machine (30);
Described synchronous machine (30) has the operating state be electrically connected with described frequency converter (10) and the on-position be electrically connected with described energy-dissipating brake circuit.
2. synchronous machine braking circuit according to claim 1, it is characterized in that, described energy-dissipating brake circuit comprises heating resistor (20), the three phase supply circuit of described synchronous machine (30) is respectively arranged with described heating resistor (20), and the described power supply circuits arbitrarily between two-phase form loop.
3. synchronous machine braking circuit according to claim 2, is characterized in that, the circuit at each described heating resistor (20) place is provided with switch (40).
4. a synchronous machine braking system, applies synchronous machine braking circuit according to claim 1, it is characterized in that, described synchronous machine braking system comprises:
Checkout gear, detects brake signal;
Control device, when described checkout gear detects described brake signal, the connecting circuit of control synchronization motor (30) is switched to energy-dissipating brake circuit from frequency converter (10), and controls described synchronous machine (30) stall.
5. synchronous machine braking system according to claim 4, it is characterized in that, described checkout gear is simultaneously for detecting the fault type of described synchronous machine braking system place equipment, and described synchronous machine braking system also comprises the display unit of the failure code for showing described fault type.
6. a synchronous machine braking method, is characterized in that, comprising:
Detect brake signal;
When described brake signal being detected, the connecting circuit of control synchronization motor (30) is switched to energy-dissipating brake circuit from frequency converter (10), makes described synchronous machine (30) stall.
7. synchronous machine braking method according to claim 6, is characterized in that, the step of described detection brake signal comprises:
Detect emergent stop signal or fault-signal;
When described emergent stop signal or fault-signal being detected, confirm described brake signal to be detected.
8. synchronous machine braking method according to claim 6; it is characterized in that, described brake signal comprises: manual emergent stop signal, frequency converter (10) error protection signal, the stuck signal of compressor, vibration of compressor abnormal signal, voltage ripple of power network signal and motor temperature exceed standard signal.
9. synchronous machine braking method according to claim 6, it is characterized in that, described energy-dissipating brake circuit comprises heating resistor (20), the three phase supply circuit of described synchronous machine (30) is respectively arranged with described heating resistor (20), and the described power supply circuits arbitrarily between two-phase form loop.
10. synchronous machine braking method according to claim 6, is characterized in that, described make the step of described synchronous machine (30) stall after also comprise:
After detection described synchronous machine (30) stall, the connecting circuit controlling described synchronous machine (30) switches to described frequency converter (10) from described energy-dissipating brake circuit, and sends safety signal.
11. synchronous machine braking methods according to claim 6, it is characterized in that, described when described brake signal being detected, the step that the connecting circuit of control synchronization motor (30) is switched to energy-dissipating brake circuit from frequency converter (10) also comprises: when described brake signal being detected, controls display unit display failure code.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310714228.2A CN104734584A (en) | 2013-12-20 | 2013-12-20 | Synchronous motor braking circuit, braking system and braking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310714228.2A CN104734584A (en) | 2013-12-20 | 2013-12-20 | Synchronous motor braking circuit, braking system and braking method |
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| Publication Number | Publication Date |
|---|---|
| CN104734584A true CN104734584A (en) | 2015-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310714228.2A Pending CN104734584A (en) | 2013-12-20 | 2013-12-20 | Synchronous motor braking circuit, braking system and braking method |
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| Country | Link |
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| CN (1) | CN104734584A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026789A (en) * | 2016-07-29 | 2016-10-12 | 捷和电机制品(深圳)有限公司 | Brushless direct current motor braking circuit and brushless direct current motor |
| JP2017204942A (en) * | 2016-05-12 | 2017-11-16 | オムロンオートモーティブエレクトロニクス株式会社 | Motor control device |
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| CN201297423Y (en) * | 2008-04-12 | 2009-08-26 | 项美根 | Precision regulation and control mechanism of a valve electric device |
| CN201461396U (en) * | 2009-06-08 | 2010-05-12 | 杭州思佳电气技术有限公司 | Screw pump controller |
| JP2011101482A (en) * | 2009-11-05 | 2011-05-19 | Okuma Corp | Motor system |
| CN203608125U (en) * | 2013-12-20 | 2014-05-21 | 珠海格力电器股份有限公司 | Synchronous motor braking circuit and braking system thereof |
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2013
- 2013-12-20 CN CN201310714228.2A patent/CN104734584A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201297423Y (en) * | 2008-04-12 | 2009-08-26 | 项美根 | Precision regulation and control mechanism of a valve electric device |
| CN201461396U (en) * | 2009-06-08 | 2010-05-12 | 杭州思佳电气技术有限公司 | Screw pump controller |
| JP2011101482A (en) * | 2009-11-05 | 2011-05-19 | Okuma Corp | Motor system |
| CN203608125U (en) * | 2013-12-20 | 2014-05-21 | 珠海格力电器股份有限公司 | Synchronous motor braking circuit and braking system thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017204942A (en) * | 2016-05-12 | 2017-11-16 | オムロンオートモーティブエレクトロニクス株式会社 | Motor control device |
| CN106026789A (en) * | 2016-07-29 | 2016-10-12 | 捷和电机制品(深圳)有限公司 | Brushless direct current motor braking circuit and brushless direct current motor |
| CN106026789B (en) * | 2016-07-29 | 2018-08-24 | 捷和电机制品(深圳)有限公司 | Brushless direct current motor braking circuit and brushless direct current motor |
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Application publication date: 20150624 |