CN201181922Y - Multilevel series connection type high power converter of switch reluctance motor - Google Patents
Multilevel series connection type high power converter of switch reluctance motor Download PDFInfo
- Publication number
- CN201181922Y CN201181922Y CNU2008200350876U CN200820035087U CN201181922Y CN 201181922 Y CN201181922 Y CN 201181922Y CN U2008200350876 U CNU2008200350876 U CN U2008200350876U CN 200820035087 U CN200820035087 U CN 200820035087U CN 201181922 Y CN201181922 Y CN 201181922Y
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- power
- voltage
- power converter
- switched reluctance
- reluctance motor
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Abstract
The utility model relates to a multi-stage series high-power transducer for a switched reluctance motor, which adopts a plurality of low-voltage power conversion units connected together in series to realize direct medium-voltage and high-voltage outputs. Consequently, each power unit can be applied in a high-voltage, high-power transmission case without bearing high voltage. The transducer can reduce the switching frequency of a power device, thus reducing the loss of the device and increasing the efficiency of the system. Compared with the conventional power transducer, the transducer can apply the switched reluctance motor in the high-power transmission case.
Description
Technical field
The utility model relates to the power inverter of switched reluctance machines, the high-power converter of particularly a kind of switched reluctance machines plural serial stage type.
Background technology
The switched reluctance machines drive system is a kind of governing system that last century, the eighties occurred, and it is made up of switched reluctance machines, power inverter, controller and position detector.Power inverter is the circuit arrangement of driving switch reluctance motor, for it provides electric energy.In the decades of switched reluctance machines development, the research of power inverter is focus and difficult point always, it plays a part crucial to the performance of whole system, but because the restriction of power inverter self-capacity, for some high-power applications occasions, traditional power inverter is difficult to satisfy the requirement of system.
The power inverter of traditional switched reluctance machines makes it be difficult in large-power occasions (more than the 500kW) and is used owing to the restriction of power device self-capacity.And level number is less, causes the power device switch often, and the loss of device is big, the failure rate height, and system effectiveness is low, and the degree of reliability is poor, does not satisfy and produces actual requirement.
The utility model content
The purpose of this utility model is according to the weak point in the prior art, provides a kind of simple in structure, and the loss of device is little, the high-power converter of switched reluctance machines plural serial stage type that system effectiveness is high.
The topological structure of the high-power converter of plural serial stage type of the present utility model, receive the three-phase input by line voltage through the secondary side of isolating transformer, the power cell power supply input side of single-phase export structure is powered to reluctance motor, its power cell is made up of 2-10 identical power cell, adjacent power cell output is together in series, form star-like draw bail, the winding power supply that each power cell is isolated by one group of secondary side of input phase shifting transformer respectively.High power switch resistance motor power converter topological structure makes switched reluctance machines be applied to large-power occasions and becomes a reality.
The utility model proposes the topological structure of the high-power converter of a kind of switched reluctance machines plural serial stage type.This topological structure can reduce the switch number of times of power device, reduces the loss of device, further improves the efficient of system.Compare with conventional power converters, use this utility model switched reluctance machines can be applied to high-power transmission occasion.Direct voltage of the present utility model output is not direct output, but output series connection back stack by some unit obtains, and like this for each power cell, needn't bear the power device that high pressure promptly can adopt low pressure.Compare with traditional single direct voltage output type power inverter, will bring up to n on the Power Theory of the high-power converter of plural serial stage type doubly.
The utility model beneficial effect compared with prior art is:
1, each is by n power unit cascade, and under the same motor capacity, the capacity of the utility model device has only the 1/n of conventional transducers device capacity, has reduced system cost.
2, improve the operating efficiency of motor.Adopt the utility model, can reduce the switch number of times of device, reduce the loss of system, improve the efficient of system.
3, because the voltage that device of the present utility model bears is the 1/n of direct voltage, so under the situation of equivalent device capacity, switched Reluctance Motor Control System can be applied to large-power occasions.
Description of drawings
Fig. 1 is the heterogeneous high-power inverter main circuit topological structure of the utility model plural serial stage type.
Fig. 2 is the utility model H bridge power unit topological structure.
Fig. 3 is the single-phase two unit H bridge tandem type power converter constructions of the utility model typical case.
Fig. 4 is the single-phase two unit H bridge series connection power inverter working state figures of the utility model typical case.
Embodiment
The utility model will be further described below in conjunction with the embodiment in the accompanying drawing:
Shown in Figure 1, the heterogeneous high-power inverter main circuit topological structure of the utility model plural serial stage type is made up of several H bridge units in series.This H bridge unit is consistent with the power device type and the quantity of conventional power converters one phase, and its topological structure is with reference to figure 3.
Line voltage is powered to power cell through isolating transformer (phase shifting transformer) secondary side of multipleization, and power cell is the three-phase input, the structure of single-phase output.The output of adjacent power unit is together in series, forms star-like draw bail, realize that the middle and high straightening of power inverter connects output, supply with middle and high piezoelectricity machine.By one group secondary side winding power supply of input phase shifting transformer, isolate, so power cell between be mutually insulated respectively by Circuit Fault on Secondary Transformer for each power cell.Whenever, formed by n power unit cascade, each power cell maximum is born whole output currents, but the phase voltage of 1/n only is provided.
The concrete control procedure of the utility model in switched Reluctance Motor Control, with one mutually two H bridge units in series the operation principle of this circuit topological structure is described.With reference to figure 4, suppose that input DC power is Es, this circuit topology has 5 kinds of operating states.
State 2: main switching device Sa1, Sa2, Sa3, the Sa4 conducting, winding current is shown in ia among Fig. 4 (a), and the voltage that this moment, motor windings was born is 2Es.
1: four main switching device of state needs only any three of conducting, shown in winding current ia among Fig. 4 (b), and Sa1, Sa2, Sa3 conducting, the voltage that this moment, winding bore is Es.
Main switching device of each conducting of 0: two H bridge of state unit, shown in winding current ia among Fig. 4 (c), Sa2, Sa4 conducting, the voltage that this moment, winding bore is 0.
One of any conducting of state-1: four main switching device, shown in winding current ia among Fig. 4 (d), main switching device Sa2 conducting, the voltage that this moment, winding bore is-Es.
State-2: four main switching device is all closed, and flows through load current by diode Da1, Da2, Da3, Da4, and winding current is shown in ia among Fig. 4 (e), and the voltage that this moment, winding bore is-2Es.
Utilize above-mentioned switch combination can realize the five level operation of switched reluctance machines two units in series, promptly 2Es, Es, O ,-Es ,-2Es, cooperate the acceleration and deceleration operation of motor can obtain good sound attitude operation characteristic.And the like, when adopting n H bridge units in series, can obtain 2n+1 level, not only can improve switched reluctance machines sound attitude operation characteristic, can also be applied to high-power transmission occasion.
Claims (2)
1, the high-power converter of a kind of switched reluctance machines plural serial stage type, receive the three-phase input by line voltage through the secondary side of isolating transformer, the power cell power supply input side of single-phase export structure is powered to reluctance motor, it is characterized in that: its power cell is made up of 2-n identical power cell, adjacent power cell output is together in series, form star-like draw bail, the winding power supply that each power cell is isolated by one group of secondary side of input phase shifting transformer respectively.
2, the high-power converter of switched reluctance machines plural serial stage type according to claim 1 is characterized in that: adopt the mode of 1-10 low pressure and low power converter unit series connection to realize direct middle and high pressure output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200350876U CN201181922Y (en) | 2008-04-11 | 2008-04-11 | Multilevel series connection type high power converter of switch reluctance motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200350876U CN201181922Y (en) | 2008-04-11 | 2008-04-11 | Multilevel series connection type high power converter of switch reluctance motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201181922Y true CN201181922Y (en) | 2009-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200350876U Expired - Fee Related CN201181922Y (en) | 2008-04-11 | 2008-04-11 | Multilevel series connection type high power converter of switch reluctance motor |
Country Status (1)
| Country | Link |
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| CN (1) | CN201181922Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105939136A (en) * | 2015-03-04 | 2016-09-14 | 尼得科（北京）传动技术有限公司 | Speed regulation apparatus and speed regulation system for switched reluctance motor |
-
2008
- 2008-04-11 CN CNU2008200350876U patent/CN201181922Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105939136A (en) * | 2015-03-04 | 2016-09-14 | 尼得科（北京）传动技术有限公司 | Speed regulation apparatus and speed regulation system for switched reluctance motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090114 Termination date: 20130411 |