CN103856071B - The power cell control circuit of high voltage converter - Google Patents
The power cell control circuit of high voltage converter Download PDFInfo
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- CN103856071B CN103856071B CN201210521798.5A CN201210521798A CN103856071B CN 103856071 B CN103856071 B CN 103856071B CN 201210521798 A CN201210521798 A CN 201210521798A CN 103856071 B CN103856071 B CN 103856071B
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Abstract
A kind of power cell the invention discloses high voltage converter controls circuit, mainly detects circuit including power circuit, fiber optic interface circuits, control logic circuit, power switch driver circuit and DC voltage；Wherein, fiber optic interface circuits are connected by optical fiber with high voltage converter master controller, and connect control logic circuit；Power switch driver circuit connects the power switch in control logic circuit and power cell respectively；DC voltage detection circuit input side connects the dc bus two ends of power cell, outlet side connection control logic circuit；DC voltage detects circuit, is changed into data signal and gives control logic circuit DC bus-bar voltage signal and encoded, then is sent to high voltage converter master controller by optical fiber by fiber optic interface circuits.Circuit is controlled using power cell of the invention, the monitoring function of power cell can be improved, be favorably improved the operation stability of high voltage converter.
Description
Technical field
It is electric the present invention relates to power electronics and control technology, more particularly to a kind of power cell control of high voltage converter
Road.
Background technology
In high voltage converter field, from Peter W. Hammond nineteen ninety-five propose unit series high-voltage frequency converter with
Come, this utilization low-voltage power converter technique realizes the method for high-tension electricity conversion because its output voltage wave mode is good, it is humorous to be input into
Ripple electric current is low, low cost, easy to maintenance, has become the mainstream technology of high voltage converter, and domestic and international many producers have all pushed away
The product based on this technology is gone out.Due in energy-saving, improvement production technology, improving the aspects such as service life of structure effect
Fruit is notable, using more prevalent.
Fig. 1 is the main circuit schematic diagram of existing power unit cascade high voltage converter, and a kind of this kind of high pressure is shown in figure
The typical scenario of frequency converter.High voltage converter shown in Fig. 1, per being formed by 3 power unit cascades, high voltage converter includes
1, nine identical power cells of transformer（Such as 2AU）With master controller 3.Transformer 1 includes 1 primary side winding 11 and 9 phases
The different three-phase vice-side winding in position（Such as 12AU）, primary side winding 11 is connected with high pressure three phase network 5；9 power cells（Such as 2AU）
It is divided into U, V, W three-phase according to output, three power cells per phase（Such as 2AU, 2BU, 2CU）Output be sequentially connected in series respectively as
Three-phase（Such as U phases）, one end au+, av+, aw+ of three-phase be connected together as the neutral point O of three-phase output, other end cu-,
Cv-, cw- are exported respectively as U, V, W of high voltage converter, for driving high-voltage motor 4.Master controller 3 is distinguished by optical fiber
With each power cell（Such as 2AU）Connection, to each power cell（Such as 2AU）Control signal is provided, and receives each power cell（Such as
2AU）Operation information.
Each power cell in Fig. 1（Such as 2AU）Including fuse 21, rectification circuit 22, DC filtering circuit 23, inversion
Circuit 24, unit by-pass circuit 25 and unit control circuit 26, as shown in Figure 2.In existing high voltage transducer power unit,
Unit control circuit generally only include fiber optic interface circuits, control logic circuit, fuse detection circuit, excess temperature detection circuit and
Power switch pipe（Such as insulated gate bipolar triode, abbreviation IGBT）Drive circuit；Wherein, excess temperature detection circuit is generally using temperature
Degree switch, when power cell is overheated, sends switching signal, to realize power cell overheat protector to unit control circuit.
High voltage converter is used for industrial large-sized electric machine speed regulation, very high to operation stability requirement.In above-mentioned power cell
Under the framework of series connection, many power cells are all included in every high voltage converter, the reliability of power cell just turns into restriction
The key factor of high voltage converter operation stability.
In order to improve the reliability of power cell, it is necessary to strengthen the monitoring to power cell operation conditions, by power cell
The feedback of the information such as DC bus-bar voltage, radiator temperature to the master controller 3 of high voltage converter, participate in the control of high voltage converter
System, and inquired about at any time in high voltage converter running.But up to now, all high voltage converters do not possess these work(also
Energy；Even if some producers notice these functions, implementation is also had no.To find out its cause, being deposited between the power cell of high voltage converter
In voltage difference very high, usual power cell is connected with master controller simply by a pair of optical fiber, and transmission means are limited.How
Signals such as DC bus-bar voltage, the radiator temperature of power cell etc. are sent to master controller by optical fiber, also exist really all
It is more difficult.
The content of the invention
In view of this, it is a primary object of the present invention to provide a kind of control circuit of high voltage transducer power unit, can
Transmitted with the optical fiber for realizing the signal such as DC bus-bar voltage, radiator temperature of power cell, high voltage converter work(can be strengthened
The monitoring performance of rate unit, strengthens the operation monitoring capacity of high voltage converter, and then improve the operation stability of high voltage converter.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of power cell control circuit of high voltage converter, including power circuit；Also include fiber optic interface circuits, control
Logic circuit, power switch driver circuit and DC voltage detection circuit；Wherein：
The fiber optic interface circuits are connected by optical fiber with the master controller of high voltage converter；The fiber optic interface circuits are also
Connection control logic circuit, is converted into the optical signal from the master controller electric signal and is sent to the control logic electricity
Road, and the electric signal from the control logic circuit is transformed into optical signal is sent to the master controller；
The power switch driver circuit connects the power switch in the control logic circuit and power cell respectively, will
Control signal from the control logic circuit amplifies to drive the power switch；And send out the operation information of power switch
Give the control logic circuit；
The input of the DC voltage detection circuit is analog signal, and input side connects the dc bus two of power cell
End；Output digit signals, outlet side connection control logic circuit；The DC voltage detects circuit by the end of DC filtering circuit
Voltage signal is changed into data signal and gives the control logic circuit and encoded, then is passed through by the fiber optic interface circuits
Optical fiber is sent to high voltage converter master controller.
Wherein：The unit control circuit also includes temperature sensing circuit, and the temperature sensing circuit specifically includes temperature biography
Sensor and temperature measurement circuit；The temperature sensor is that negative tempperature coefficient thermistor connects temperature measurement circuit；The temperature measurement circuit
Export and connect the control logic circuit as the output end of temperature sensing circuit, thermometric electricity is read by the control logic circuit
The output signal on road is simultaneously encoded, then is sent to high-voltage frequency converter controller by optical fiber by the fiber optic interface circuits.
The temperature sensing circuit is output as data signal, and its signal frequency increases with the rising of power cell temperature
Greatly.
The DC voltage detection circuit specifically includes amplifying circuit and analog/digital conversion circuit；The amplifying circuit it is defeated
Enter end be DC voltage detect circuit input, its output end as analog/digital conversion circuit input；Analog/digital conversion
The output end of circuit detects the output end of circuit as the DC voltage.
The amplifying circuit is isolating amplifier circuit, electrical isolation between its input, output end.
The change-over period of the analog/digital conversion circuit is same to the data transmitting period of master controller with fiber optic interface circuits
Step.
The analog/digital conversion circuit is output as pulse width modulation (PWM) signal, the light of its frequency and fiber optic interface circuits
Fine transmission frequency is identical, and pulse width is directly proportional to input voltage, is directly read and is encoded by the control logic circuit.
The output end of the power circuit drives with the fiber optic interface circuits, control logic circuit, power switch respectively
Circuit and DC voltage detection circuit connection；The input of the power circuit is DC voltage, and the direct current for connecting power cell is female
Line；Or,
The input of the power circuit is alternating voltage, connects the input of power cell.
The power cell control circuit of the high voltage converter that the present invention is provided, has the following advantages that：
Circuit is controlled using the power cell, can realize that DC bus-bar voltage, radiator temperature of power cell etc. are believed
Number detection, it is possible to the result of detection is sent the master controller of high voltage converter by optical fiber to, so that master controller energy
Enough DC bus-bar voltages and radiator for understanding each power cell in real time（Or power switch）Temperature, not only can be to power cell
Operation conditions monitored, power cell fault is prevented early, but also can using these information to high voltage converter
Control parameter be adjusted, improve the performance of high voltage converter.Therefore the power cell control electricity for being provided using the present invention
Road, can be effectively improved the operation stability of high voltage converter.
Brief description of the drawings
Fig. 1 is the main circuit schematic diagram of existing power unit cascade high voltage converter；
Fig. 2 is the principle schematic that high voltage transducer power unit of the present invention controls circuit；
Fig. 3 A are the principle schematic of temperature sensing circuit in power cell control circuit of the present invention；
Fig. 3 B are the Input output Relationship of temperature sensing circuit in power cell control circuit of the present invention；
Fig. 4 A are the basic circuit diagram of DC voltage detection circuit in power cell control circuit of the present invention；
Fig. 4 B are a kind of circuit diagram of analog/digital conversion circuit in Fig. 4 A；
Fig. 4 C are the Input output Relationship of analog/digital conversion circuit in Fig. 4 B；
Fig. 5 A are that power cell control circuit of the present invention includes the principle schematic of power supply；
Fig. 5 B are another principle schematic that power cell of the present invention controls circuit.
【Critical piece symbol description】
1：Transformer
11：Primary side winding
12AU、12AV、12AW、12BU、12BV、12BW 、12CU、12CV、12CW：Vice-side winding
2、2AU、2AV、2AW；2BU、2BV、2BW；2CU、2CV、2CW：Power cell
21：Fuse
22：Rectification circuit
23：DC filtering circuit
24：Inverter circuit
241~244：Power switch
25：Unit by-pass circuit
26：Power cell controls circuit
261：Fiber optic interface circuits
262：Control logic circuit
263：Power switch driver circuit
264：DC voltage detects circuit
2641：Amplifying circuit
2642：Analog/digital conversion circuit
26421：Comparator
26422：Constant-current source
26423：Electronic switch
26424：Capacitor
265：Temperature sensing circuit
2651：Temperature sensor
2652：Temperature measurement circuit
266：Fuse detects circuit
267：Bypass control circuit
268：Power circuit
3：Master controller
4：High-voltage motor
5：Three-phase high-voltage power network.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiments of the invention the power cell of high voltage converter of the present invention control circuit is made into
One step is described in detail.
Fig. 2 is the principle schematic of the power cell control circuit of high voltage converter of the present invention.High-pressure frequency-conversion shown in Fig. 2
In the power cell control circuit of device, fuse 21, rectification circuit 22, DC filtering circuit 23, by inverter circuit 24 and unit
Road circuit 25, constitutes the main circuit of power cell, and power cell control circuit 26 is the present invention to be further illustrated
Circuit.
In fig. 2, the power cell control circuit 26, mainly includes fiber optic interface circuits 261, logic control circuit
262nd, power switch driver circuit 263 and DC voltage detection circuit 264；Wherein：
Fiber optic interface circuits 261 are externally connected by optical fiber with the master controller 3 of high voltage converter；Fiber optic interface circuits
261 are connected inside power cell control circuit with control logic circuit 262.Fiber optic interface circuits 261 are by optical receiving circuit
Constituted with optical fiber transmission circuit；By the control optical signal that optical fiber sends be transformed into master controller 3 by optical receiving circuit
Electric signal, is then forwarded to logic control circuit 262；Optical fiber transmission circuit is by from the transformation of the electric signal of control logic circuit 262
Into optical signal, then master controller 3 is sent to by optical fiber.
Power switch driver circuit 263, connects the work(in control logic circuit 262 and power cell inverter circuit 24 respectively
Rate switch 241 ~ 244, the power switch control signal from control logic circuit 262 is zoomed into meet power switch 241 ~
Voltage and current required for 244,241 ~ 244 are switched with driving power.Power switch driver circuit 263 is also by power switch
Operation information（Such as failure）Feed back to control logic circuit 262 to be encoded, and master is sent to via fiber optic interface circuits 261
Controller 3.
DC voltage detects circuit 264, and its input is analog voltage signal, and input side connects the dc bus of power cell
Two ends p, n；It is output as data signal, outlet side connection control logic circuit 262.DC voltage detects circuit 264 by power
The DC bus-bar voltage of unit is changed into data signal and is sent to control logic circuit 262 and encoded, then by optical fiber interface electricity
Road 261 is sent to the master controller 3 of high voltage converter by optical fiber.
In the power cell control circuit 26 of Fig. 2, also including temperature sensing circuit 265.Fig. 3 A give a kind of temperature
The schematic diagram of circuit 265 is detected, including temperature sensor 2651 and temperature measurement circuit 2652.Temperature sensor therein is negative
Temperature coefficient（NTC）Thermistor, has been widely used for temperature detection, but be yet there are no in high voltage transducer power unit
Using；With temperature switch, the positive temperature coefficient that application has been obtained in high voltage transducer power unit（PTC）Thermistor phase
Than NTC thermistor temperature measurement accuracy is high, and model is numerous, cheap；Due to electric using NTC temperature-sensitives in temperature sensing circuit 265
Resistance 2651 so that the temperature detecting precision in power cell control circuit 26 of the invention is improved.Temperature sensor 2651
May be mounted on the radiator of power cell, for perceiving radiator temperature；In addition, Partial Power is switched（Such as IGBT）Module
In built-in NTC thermistor, temperature sensing circuit 26 can also directly using the NTC temperature-sensitives inside power switching modules
Resistance carries out thermometric.
In figure 3 a, the connection of temperature sensor 2651 temperature measurement circuit 2652；The output f of temperature measurement circuit 2652 is temperature inspection
The output of slowdown monitoring circuit 2652, connects control logic circuit 262；The output f of temperature sensing circuit 265 is data signal, its frequency
Change with NTC thermistor resistance, data signal f can be directly read and encoded by control logic signal 262, Ran Houyou
Optical fiber interface signal 261 is sent to master controller 3 by optical fiber.
Fig. 3 B give the resistance and output signal f of NTC thermistor in the temperature sensing circuit 265 shown in Fig. 3 A
Frequency variation with temperature curve.As can be seen that with the rising of temperature, although the decline of NTC thermistor resistance tends to flat
It is slow, but the frequency rising of output signal f tends to sensitive, and it is identical that this needs with the thermometric of power cell.
Fig. 4 A describe the principle schematic of the DC voltage detection circuit 264 of the control circuit of power cell shown in Fig. 2, its
In, DC voltage detection circuit 264 includes amplifying circuit 2641 and analog/digital conversion circuit 2642.The input of amplifying circuit 2641
End is the input of the DC voltage detection circuit 264 at place, connects two ends p, n of the DC filtering circuit of power cell；
The output signal v of amplifying circuit 2641 as analog/digital conversion circuit 2642 input end signal；And analog/digital conversion circuit 2642
Output end then as place DC voltage detect circuit 264 output end, connect control logic circuit 262, patrolled by control
The DC bus-bar voltage signal after circuit 262 directly reads digitlization is collected, is passed through by fiber optic interface circuits 261 again after being encoded
Optical fiber is sent to master controller 3.
In Figure 4 A, the amplifying circuit 2641 in DC voltage detection circuit can be isolating amplifier circuit, wherein connecting
Electrical isolation between the side of dc bus p, n and the side of connection analog change-over circuit 2642.
In Figure 4 A it can also be seen that DC voltage detects the cue between circuit 264 and control logic circuit 262
It is two-way, d is the output digit signals that DC voltage detects circuit 264, s is that the analog that control logic circuit 262 is provided turns
Change synchronizing signal.Under the control of control logic circuit 262, DC voltage can be made to detect the analog/digital conversion electricity in circuit 264
The transfer process on road 2642 and data transmitting period Complete Synchronization from fiber optic interface circuits 261 to master controller 3, so as to ensure straight
The stream busbar voltage sampling time at equal intervals, is easy to master controller 3 to be processed.
Fig. 4 B give a specific embodiment of the analog/digital conversion circuit 2642 in Fig. 4 A.In figure 4b, v is amplification
The output voltage of circuit 2641, the output signal d of analog/digital conversion circuit 2642 is pwm signal, its frequency with come from control logic
The synchronizing signal s of circuit 262 is identical, and pulse width is directly proportional to input voltage v；Because d is data signal, can be patrolled by control
Collect circuit 262 to directly read and encoded, and master controller 3 is sent to by optical fiber by fiber optic interface circuits 261.
For clarity, Fig. 4 C provide the waveform pair of the input of analog/digital conversion circuit 2642, output signal shown in Fig. 4 B
Should be related to, the features described above of analog/digital conversion circuit 2642 can be embodied.
In the power cell control circuit 26 shown in Fig. 2, its power switch driver circuit 263 and control logic circuit
262 and power cell in power switch 241 ~ 244（IGBT）Between signal be all two-way, can receive and carry out automatic control
The pwm control signal of logic circuit processed 262, power switch 241~244 is driven after carrying out voltage, Current amplifier, can also be by work(
The operation information of rate switch 241~244（Such as fault-signal）It is sent to control logic circuit 262, and and then is sent to master control
Device processed 3.
For the power switch driver circuit 263 in the power cell control circuit 26 shown in Fig. 2, in order to improve electricity
Road interference free performance, it is ensured that equipment safety, power switch driver circuit 263 connects the side of control logic circuit 262 and is connected
Can be with electrical isolation between the side of power switch 241~244.Electrical isolation can be by devices such as photoelectrical coupler, transformers
Part is realized.
In the power cell control circuit 26 shown in Fig. 2, can also include that fuse detects circuit 266, can be to work(
The break-make of the fuse 21 of rate unit is detected.It is whole in the input side connection power cell of the fuse detection circuit 266
The AC of current circuit 22；The outlet side connection control logic circuit 262 of fuse detection circuit 266, it is molten by what is detected
The disconnected break-make information of device 21 is sent to control logic circuit 262.
In the power cell control circuit 26 shown in Fig. 2, between the input side and outlet side of fuse detection circuit 266
Can also be galvanically isolated.
In the power cell control circuit 26 shown in Fig. 2, can also include that unit bypass controls circuit 267；By unit
Road control circuit 267 connects the unit by-pass circuit 25 of control logic circuit 262 and power cell respectively, to realize master controller
3 pairs of controls of the unit by-pass circuit of power cell 25.
In power cell control circuit 26 shown in Fig. 2, also including power supply 268, as shown in Figure 5A.The output of power supply 268
Respectively with the unit control circuit 26 at place in fiber optic interface circuits 261, control logic circuit 262, power switch circuit
263rd, the functional circuit such as DC voltage detection circuit 264 is connected, for other functional circuits in unit control circuit 26 are provided
Electric power.In fig. 5, the input of the power supply 268 in unit control circuit 26 is DC voltage, is connected to the direct current of power cell
The two ends of filter circuit 23.Fig. 5 B provide a kind of version of Fig. 5 A.In figure 5b, the power supply in unit control circuit 26
268 input is alternating voltage, is connected to the input of power cell.
The above, only present pre-ferred embodiments are not intended to limit the scope of the present invention.
Claims (5)
1. a kind of power cell control circuit of high voltage converter, including power circuit；Characterized in that, also including optical fiber interface
Circuit, control logic circuit, power switch driver circuit and DC voltage detection circuit；Wherein：
The fiber optic interface circuits are connected by optical fiber with the master controller of high voltage converter；The fiber optic interface circuits are also connected with
Control logic circuit, is converted into the optical signal from the master controller electric signal and is sent to the control logic circuit, and
Electric signal from the control logic circuit is transformed into optical signal and is sent to the master controller；
The power switch driver circuit connects the power switch in the control logic circuit and power cell respectively, will come from
The control signal of the control logic circuit amplifies to drive the power switch；And be sent to the operation information of power switch
The control logic circuit；
The input of the DC voltage detection circuit is analog signal, and input side connects the dc bus two ends of power cell；It is defeated
Go out data signal, outlet side connection control logic circuit；The DC voltage detects circuit by the terminal voltage of DC filtering circuit
Signal is changed into data signal and gives the control logic circuit and encoded, then passes through optical fiber by the fiber optic interface circuits
It is sent to high voltage converter master controller；The DC voltage detection circuit specifically includes amplifying circuit and analog/digital conversion circuit；
The input of the amplifying circuit is the input that DC voltage detects circuit, and its output end is used as analog/digital conversion circuit
Input；The output end of analog/digital conversion circuit detects the output end of circuit as the DC voltage；The amplifying circuit be every
From amplifying circuit, electrical isolation between its input, output end；
The control logic circuit provides analog/digital conversion synchronizing signal and detects circuit to the DC voltage, so that the analog
The change-over period of change-over circuit is synchronous to the data transmitting period of master controller with fiber optic interface circuits.
2. the power cell of high voltage converter controls circuit according to claim 1, it is characterised in that the unit control circuit
Also include temperature sensing circuit, the temperature sensing circuit specifically includes temperature sensor and temperature measurement circuit；The TEMP
Device is negative temperature thermistor, connects temperature measurement circuit；The output of the temperature measurement circuit connects as the output end of temperature sensing circuit
The control logic circuit is connect, the output signal of temperature measurement circuit is read by the control logic circuit and is encoded, then by institute
State fiber optic interface circuits and high voltage converter master controller is sent to by optical fiber.
3. the power cell of high voltage converter controls circuit according to claim 2, it is characterised in that the temperature detection electricity
Road is output as data signal, and the digital signal frequency increases with the rising of power cell temperature.
4. the power cell of high voltage converter controls circuit according to claim 1, it is characterised in that the analog/digital conversion
Circuit is output as pulse width modulation (PWM) signal, and its frequency is identical with the optical fiber transmission frequency of fiber optic interface circuits, and pulse is wide
Degree is directly proportional to input voltage, is directly read and is encoded by the control logic circuit.
5. the power cell of high voltage converter controls circuit according to claim 1, it is characterised in that the power circuit
Output end detects circuit with the fiber optic interface circuits, control logic circuit, power switch driver circuit and DC voltage respectively
Connection；The input of the power circuit is DC voltage, connects the dc bus of power cell；Or, the power circuit is defeated
It is alternating voltage to enter, and connects the input of power cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210521798.5A CN103856071B (en) | 2012-12-07 | 2012-12-07 | The power cell control circuit of high voltage converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210521798.5A CN103856071B (en) | 2012-12-07 | 2012-12-07 | The power cell control circuit of high voltage converter |
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| Publication Number | Publication Date |
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| CN103856071A CN103856071A (en) | 2014-06-11 |
| CN103856071B true CN103856071B (en) | 2017-06-16 |
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| CN201210521798.5A Expired - Fee Related CN103856071B (en) | 2012-12-07 | 2012-12-07 | The power cell control circuit of high voltage converter |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104218777A (en) * | 2014-09-17 | 2014-12-17 | 国家电网公司 | Monitoring system of cascaded multilevel high-voltage inverter power unit |
| CN109245755B (en) * | 2017-07-10 | 2024-04-09 | 兆易创新科技集团股份有限公司 | High-voltage logic circuit |
| CN111145530B (en) * | 2019-12-31 | 2023-10-13 | 深圳库马克科技有限公司 | Communication method of high-voltage frequency converter power unit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101202516A (en) * | 2006-12-11 | 2008-06-18 | 美国凹凸微系有限公司 | Mixed-mode DC/AC inverter |
| CN201341111Y (en) * | 2009-01-21 | 2009-11-04 | 北京浩普华清电气技术有限公司 | Power unit control circuit board of high-voltage frequency transformer |
| CN101645703A (en) * | 2008-08-05 | 2010-02-10 | 英特赛尔美国股份有限公司 | Active pulse positioning modulator |
| CN102280862A (en) * | 2011-08-26 | 2011-12-14 | 广州三晶电气有限公司 | Frequency converter input/output reverse connection detection protection method and device |
| CN102457196A (en) * | 2011-12-22 | 2012-05-16 | 上海中发变频科技有限公司 | Power unit control plate of high-voltage frequency converter |
| CN102684510A (en) * | 2011-03-18 | 2012-09-19 | 上海雷诺尔科技股份有限公司 | Intelligent integrated unit module suitable for cascading high-voltage frequency converter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7123494B2 (en) * | 2003-05-06 | 2006-10-17 | Semiconductor Components Industries, L.L.C. | Power factor correction circuit and method of varying switching frequency |
| WO2008133859A2 (en) * | 2007-04-25 | 2008-11-06 | Advanced Analogic Technologies, Inc. | Step-down switching regulator with freewheeling diode |
-
2012
- 2012-12-07 CN CN201210521798.5A patent/CN103856071B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101202516A (en) * | 2006-12-11 | 2008-06-18 | 美国凹凸微系有限公司 | Mixed-mode DC/AC inverter |
| CN101645703A (en) * | 2008-08-05 | 2010-02-10 | 英特赛尔美国股份有限公司 | Active pulse positioning modulator |
| CN201341111Y (en) * | 2009-01-21 | 2009-11-04 | 北京浩普华清电气技术有限公司 | Power unit control circuit board of high-voltage frequency transformer |
| CN102684510A (en) * | 2011-03-18 | 2012-09-19 | 上海雷诺尔科技股份有限公司 | Intelligent integrated unit module suitable for cascading high-voltage frequency converter |
| CN102280862A (en) * | 2011-08-26 | 2011-12-14 | 广州三晶电气有限公司 | Frequency converter input/output reverse connection detection protection method and device |
| CN102457196A (en) * | 2011-12-22 | 2012-05-16 | 上海中发变频科技有限公司 | Power unit control plate of high-voltage frequency converter |
Non-Patent Citations (1)
| Title |
|---|
| NTC热敏电阻及其应用分析;李加升;《荆门职业技术学院学报》;20070630;"2.2 在RC振荡器中的应用"，图4 * |
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