CN104638884A - Self-locking PWM (pulse-width modulation) wave generation circuit for measuring remote calibration apparatus - Google Patents
Self-locking PWM (pulse-width modulation) wave generation circuit for measuring remote calibration apparatus Download PDFInfo
- Publication number
- CN104638884A CN104638884A CN201410716705.3A CN201410716705A CN104638884A CN 104638884 A CN104638884 A CN 104638884A CN 201410716705 A CN201410716705 A CN 201410716705A CN 104638884 A CN104638884 A CN 104638884A
- Authority
- CN
- China
- Prior art keywords
- resistance
- circuit
- integrated circuit
- connects
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003079 width control Methods 0.000 claims abstract description 19
- 210000001699 lower leg Anatomy 0.000 claims description 18
- 239000003381 stabilizer Substances 0.000 claims description 18
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 abstract 3
- 238000005516 engineering process Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K7/00—Modulating pulses with a continuously-variable modulating signal
- H03K7/08—Duration or width modulation ; Duty cycle modulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
Abstract
The invention discloses a self-locking PWM (pulse-width modulation) wave generation circuit for measuring a remote calibration apparatus. The self-locking PWM wave generation circuit comprises a control signal generation circuit, a pulse width control circuit and a self-locking PWM wave generation circuit body, the control signal generation circuit comprises an amplitude limiting circuit composed of a ZD1 and a ZD2 and an inversion differencing circuit composed of an R1, an R2, an R3, an R4, a C1 and a U1, the control signal generation circuit functions in processing signals VI and VF into an inversion signal VO1 with certain amplitude, the pulse width control circuit is composed of an R5, an R6, an R7 and a U2 and functions in matching the VO1 with a VR1 to generate a pulse width adjustable PWM control signal VO2, the self-locking PWM wave generation circuit body is composed of an upper bridge arm control circuit and a lower bridge arm control circuit, and input signals processed by the upper and lower bridge arm control circuits are identical while output signals are opposite and cannot be high at the same time, in other words, outputs VO5 and VO6 are used for controlling an IGBT (insulated gate bipolar translator) to work.
Description
Technical field
The present invention relates to a kind of PWM wave generation circuit, particularly relating to a kind of self-locking type PWM wave generation circuit for measuring long-range calibration equipment.
Background technology
Along with the development of science and technology, the progress of society, electric energy cleans as one, fast, the controllable type energy is easily carried to be widely used in all trades and professions, due to the input of rectification and frequency conversion equipment, bringing great convenience to user, simultaneously, also pollution is caused to electrical network, for this reason, Active Power Filter-APF (APF) arises at the historic moment as modern harmonic decrease devices, little by means of its volume, capacity continuously adjustabe, the feature that compensation harmonic tracking velocity is fast, the main flow equipment of harmonic wave control industry will be become, wherein, the IGBT control mode of Active Power Filter-APF (APF) becomes the key technology of its development, also be the stable foundation stone of Active Power Filter-APF device security, IGBT switch of controlling well breaks and just can well absorb or harmonic wave on compensation network, the various operating state of Active Power Filter-APF is made to be in stable state, PWM wave technology control IGBT cut-offs and becomes a hot technology, wherein, the dead zone function of IGBT is also a difficult problem of PWM ripple application.
For this reason, lot of domestic and international scholar proposes the mode of different PWM ripple control IGBT, such as use high accuracy conversion chip, or DSP processing method etc., but, considerably increase difficulty and the cost of PWM ripple control technology like this, based on this, we have proposed a kind of self-locking type PWM wave generation circuit for Active Power Filter-APF, this circuit has simple and stable, cost is low, is easy to the advantages such as realization.
Summary of the invention
Technical problem to be solved by this invention overcomes the deficiencies in the prior art, a kind of self-locking type PWM wave generation circuit for measuring long-range calibration equipment is provided, for controlling the IGBT working method of Active Power Filter-APF, this circuit is simple and reliable, cost is low, is conducive to marketing.
The technical solution adopted in the present invention is: the present invention includes control signal and produce circuit, pulse width control circuit, self-locking type PWM wave generation circuit, described control signal produces circuit, pulse width control circuit, self-locking type PWM wave generation circuit is electrically connected successively, described control signal produces the input connection handling device output signal VI and power network current feedback signal VF of circuit, PWM ripple pulse width signal VO2 needed for producing through described pulse width control circuit after described signal VI and VF is processed into the certain control signal VO1 of amplitude, signal VO2 is treated as signal VO5 and VO6 driving brachium pontis and lower brachium pontis on IGBT respectively via described self-locking type PWM wave generation circuit, finally exported by described self-locking type PWM wave generation circuit.
Described control signal produces circuit and comprises the first integrated circuit, first voltage-stabiliser tube, second voltage-stabiliser tube, first electric capacity, first resistance, second resistance, 3rd resistance, 4th resistance, one end connection handling device output signal VI of described first resistance, the described first resistance other end connects the positive pole of described first voltage-stabiliser tube, one end of described second resistance, one end of described first electric capacity, the crus secunda of described first integrated circuit, the negative pole of described first voltage-stabiliser tube connects the negative pole of described second voltage-stabiliser tube, the positive pole of described second voltage-stabiliser tube connects the other end of described second resistance, the other end of described first electric capacity, first pin of described first integrated circuit, one end of described 3rd resistance connects power network current feedback signal VF, the other end of described 3rd resistance connects the tripod of described first integrated circuit and one end of described 4th resistance, the other end connecting circuit of described 4th resistance altogether, first pin of described first integrated circuit is VO1 signal contact.
Described pulse width control circuit comprises the second integrated circuit, 5th resistance, 6th resistance, 7th resistance, one end of described 5th resistance connects VO1 signal contact, the other end of described 5th resistance connects the tripod of described second integrated circuit, the crus secunda connection signal VR1 of described second integrated circuit and one end of described 6th resistance, the other end connecting circuit of described 6th resistance altogether, first pin of described second integrated circuit connects one end of described 7th resistance, the other end of described 7th resistance connects power supply VCC, first pin of described second integrated circuit is VO2 signal contact.
Described self-locking type PWM wave generation circuit comprises the 3rd integrated circuit, 4th integrated circuit, 5th integrated circuit, 6th integrated circuit, first diode, second diode, second electric capacity, 3rd electric capacity, 8th resistance, 9th resistance, tenth resistance, 11 resistance, 12 resistance, 13 resistance, 14 resistance, 15 resistance, 16 resistance, 17 resistance, one end of described 8th resistance, one end of 13 resistance is connected and connects VO2 signal contact, the other end of described 8th resistance connects the tripod of described 3rd integrated circuit, the other end of described 13 resistance connects described 4th integrated circuit crus secunda, described 3rd integrated circuit crus secunda connects one end of described 9th resistance, one end of described 14 resistance of other end connection of described 9th resistance and circuit are altogether, the other end of described 14 resistance connects the tripod of described 4th integrated circuit, and described 3rd integrated circuit first pin connects one end of described tenth resistance, one end of 11 resistance, the negative pole of the first diode, the other end connecting circuit power supply VCC of described tenth resistance, the other end of described 11 resistance connects the positive pole of described first diode, one end of described second electric capacity, the crus secunda of described 4th integrated circuit, the other end connecting circuit of described second electric capacity altogether, the tripod connection signal VR2 of described 4th integrated circuit, first pin of described 4th integrated circuit connects one end of described 12 resistance, one end connecting circuit power supply VCC of described 12 resistance, first pin of described 4th integrated circuit exports IGBT control signal VO5, and described 5th integrated circuit first pin connects one end of described 15 resistance, one end of 16 resistance, the negative pole of the second diode, the other end connecting circuit power supply VCC of described 15 resistance, the other end of described 16 resistance connects the positive pole of described second diode, one end of described 3rd electric capacity, the crus secunda of described 6th integrated circuit, the other end connecting circuit of described 3rd electric capacity altogether, the tripod connection signal VR2 of described 6th integrated circuit, first pin of described 6th integrated circuit connects one end of described 17 resistance, one end connecting circuit power supply VCC of described 17 resistance, the first pin of described 6th integrated circuit exports IGBT control signal VO6.
The invention has the beneficial effects as follows: produce circuit owing to the present invention includes control signal, pulse width control circuit, self-locking type PWM wave generation circuit, described control signal produces circuit, pulse width control circuit, self-locking type PWM wave generation circuit is electrically connected successively, described control signal produces the input connection handling device output signal VI and power network current feedback signal VF of circuit, PWM ripple pulse width signal VO2 needed for producing through described pulse width control circuit after described signal VI and VF is processed into the certain control signal VO1 of amplitude, signal VO2 is treated as signal VO5 and VO6 driving brachium pontis and lower brachium pontis on IGBT respectively via described self-locking type PWM wave generation circuit, finally export control IGBT by described self-locking type PWM wave generation circuit.Each several part circuit function of the present invention is clear and definite and be easy to realize, the circuit parts such as circuit, pulse width control circuit, self-locking type PWM wave generation circuit are produced by simple control signal, achieve the function such as the control of IGBT upper and lower bridge arm and the control of Dead Time to Active Power Filter-APF, so have, components and parts are few, circuit simple, good stability, fail safe advantages of higher, make to be easy to promote, be easy to the marketization, and this circuit is simple and reliable, reduces the cost controlling difficulty and equipment.
Accompanying drawing explanation
Fig. 1 is that control signal of the present invention produces circuit theory schematic diagram;
Fig. 2 is that the present invention controls pulse width control circuit principle schematic;
Fig. 3 is self-locking type PWM wave generation circuit principle schematic of the present invention;
Fig. 4 is the invention process circuit theory schematic diagram.
Embodiment
As shown in Figures 1 to 4, the present invention includes control signal and produce circuit, pulse width control circuit, self-locking type PWM wave generation circuit, described control signal produces circuit, pulse width control circuit, self-locking type PWM wave generation circuit is electrically connected successively, described control signal produces the input connection handling device output signal VI and power network current feedback signal VF of circuit, PWM ripple pulse width signal VO2 needed for producing through described pulse width control circuit after described signal VI and VF is processed into the certain control signal VO1 of amplitude, signal VO2 is treated as signal VO5 and VO6 driving brachium pontis and lower brachium pontis on IGBT respectively via described self-locking type PWM wave generation circuit, finally export control IGBT by described self-locking type PWM wave generation circuit.
Described control signal produces circuit and comprises the first integrated circuit U1, first voltage-stabiliser tube ZD1, second voltage-stabiliser tube ZD2, first electric capacity C1, first resistance R1, second resistance R2, 3rd resistance R3, the other end of one end connection handling device output signal VI, the described first resistance R1 of the 4th resistance R4, described first resistance R1 connects the positive pole of described first voltage-stabiliser tube ZD1, one end of described second resistance R2, one end of described first electric capacity C1, the crus secunda of described first integrated circuit U1, the negative pole of described first voltage-stabiliser tube ZD1 connects the negative pole of described second voltage-stabiliser tube ZD2, and the positive pole of described second voltage-stabiliser tube ZD2 connects the other end of described second resistance R2, the other end of described first electric capacity C1, first pin of described first integrated circuit U1, one end of described 3rd resistance R3 connects power network current feedback signal VF, the other end of described 3rd resistance R3 connects the tripod of described first integrated circuit U1 and one end of described 4th resistance R4, altogether, first pin of described first integrated circuit U1 is VO1 signal contact to the other end connecting circuit of described 4th resistance R4.In the present embodiment, the effect of this circuit is that output signal of processor VI and power network current feedback signal VF is processed into the certain control signal VO1 of amplitude.
Described pulse width control circuit comprises the second integrated circuit U2, 5th resistance R5, 6th resistance R6, 7th resistance R7, one end of described 5th resistance R5 connects VO1 signal contact, the other end of described 5th resistance R5 connects the tripod of described second integrated circuit U2, the crus secunda connection signal VR1 of described second integrated circuit U2 and one end of described 6th resistance R6, the other end connecting circuit of described 6th resistance R6 altogether, first pin of described second integrated circuit U2 connects one end of described 7th resistance R7, the other end of described 7th resistance R7 connects power supply VCC, first pin of described second integrated circuit U2 is VO2 signal contact.In the present embodiment, the effect of this circuit is coordinated with VR1 signal by signal VO1 signal, produces the PWM ripple pulse width signal VO2 that we need, thus the switch break time of control IGBT.
Described self-locking type PWM wave generation circuit comprises the 3rd integrated circuit U3, 4th integrated circuit U4, 5th integrated circuit U5, 6th integrated circuit U6, first diode D1, second diode D2, second electric capacity C2, 3rd electric capacity C3, 8th resistance R8, 9th resistance R9, tenth resistance R10, 11 resistance R11, 12 resistance R12, 13 resistance R13, 14 resistance R14, 15 resistance R15, 16 resistance R16, 17 resistance R17, one end of described 8th resistance R8, one end of 13 resistance R13 is connected and connects VO2 signal contact, the other end of described 8th resistance R8 connects the tripod of described 3rd integrated circuit U3, the other end of described 13 resistance R13 connects described 4th integrated circuit U4 crus secunda, described 3rd integrated circuit U3 crus secunda connects one end of described 9th resistance R9, one end of the described 14 resistance R14 of other end connection of described 9th resistance R9 and circuit are altogether, the other end of described 14 resistance R14 connects the tripod of described 4th integrated circuit U4, and described 3rd integrated circuit U3 first pin connects one end of described tenth resistance R10, one end of 11 resistance R11, the negative pole of the first diode D1, the other end of the other end connecting circuit power supply VCC of described tenth resistance R10, described 11 resistance R11 connects the positive pole of described first diode D1, one end of described second electric capacity C2, the crus secunda of described 4th integrated circuit U4, the other end connecting circuit of described second electric capacity C2 altogether, the tripod connection signal VR2 of described 4th integrated circuit U4, first pin of described 4th integrated circuit U4 connects one end of described 12 resistance R12, one end connecting circuit power supply VCC of described 12 resistance R12, first pin of described 4th integrated circuit U4 exports IGBT control signal VO5, and described 5th integrated circuit U5 first pin connects one end of described 15 resistance R15, one end of 16 resistance R16, the negative pole of the second diode D2, the other end of the other end connecting circuit power supply VCC of described 15 resistance R15, described 16 resistance R16 connects the positive pole of described second diode D2, one end of described 3rd electric capacity C3, the crus secunda of described 6th integrated circuit U6, the other end connecting circuit of described 3rd electric capacity C3 altogether, the tripod connection signal VR2 of described 6th integrated circuit U6, first pin of described 6th integrated circuit U6 connects one end of described 17 resistance R17, first pin of one end connecting circuit power supply VCC of described 17 resistance R17, described 6th integrated circuit U6 exports IGBT control signal VO6.In the present embodiment, this circuit is made up of upper brachium pontis control circuit, lower brachium pontis control circuit two parts, and the input signal handled by upper and lower bridge arm control circuit is identical, and centre and output signal are on the contrary, VO2 is processed into VO5, VO6, and VO5, VO6 can not be high simultaneously; Specific as follows:
Upper brachium pontis control circuit is made up of R8, R9, R10, R11, R12, D1, C2, U3, U4, input signal VO2 homophase exports and increases its driving force by U3, R11, C2, D1 coordinate VR2 can regulate the Dead Time of brachium pontis on IGBT, namely open and close break time of brachium pontis on IGBT, R10, R12 are for increasing driving force, and VO2 is processed into the signal VO5 that can drive brachium pontis on IGBT the most at last.
Lower brachium pontis control circuit is made up of R13, R14, R15, R16, R17, D2, C3, U5, U6, U5 is by anti-phase for input signal VO2 output and increase its driving force, R16, C3, D2 coordinate VR2 can regulate the Dead Time of brachium pontis under IGBT, namely open and close break time of brachium pontis under IGBT, R15, R17 are for increasing driving force, and VO2 is processed into the signal VO6 that can drive brachium pontis under IGBT the most at last.
Claims (4)
1. one kind for measuring the self-locking type PWM wave generation circuit of long-range calibration equipment, it is characterized in that: it comprises control signal and produces circuit, pulse width control circuit, self-locking type PWM wave generation circuit, described control signal produces circuit, pulse width control circuit, self-locking type PWM wave generation circuit is electrically connected successively, described control signal produces the input connection handling device output signal VI and power network current feedback signal VF of circuit, PWM ripple pulse width signal VO2 needed for producing through described pulse width control circuit after described signal VI and VF is processed into the certain control signal VO1 of amplitude, signal VO2 is treated as signal VO5 and VO6 driving brachium pontis and lower brachium pontis on IGBT respectively via described self-locking type PWM wave generation circuit, finally exported by described self-locking type PWM wave generation circuit.
2. a kind of self-locking type PWM wave generation circuit for measuring long-range calibration equipment according to claim 1, it is characterized in that: described control signal produces circuit and comprises the first integrated circuit (U1), first voltage-stabiliser tube (ZD1), second voltage-stabiliser tube (ZD2), first electric capacity (C1), first resistance (R1), second resistance (R2), 3rd resistance (R3), 4th resistance (R4), one end connection handling device output signal VI of described first resistance (R1), the other end of described first resistance (R1) connects the positive pole of described first voltage-stabiliser tube (ZD1), one end of described second resistance (R2), one end of described first electric capacity (C1), the crus secunda of described first integrated circuit (U1), the negative pole of described first voltage-stabiliser tube (ZD1) connects the negative pole of described second voltage-stabiliser tube (ZD2), the positive pole of described second voltage-stabiliser tube (ZD2) connects the other end of described second resistance (R2), the other end of described first electric capacity (C1), first pin of described first integrated circuit (U1), one end of described 3rd resistance (R3) connects power network current feedback signal VF, the other end of described 3rd resistance (R3) connects the tripod of described first integrated circuit (U1) and one end of described 4th resistance (R4), the other end connecting circuit of described 4th resistance (R4) altogether, first pin of described first integrated circuit (U1) is VO1 signal contact.
3. a kind of self-locking type PWM wave generation circuit for measuring long-range calibration equipment according to claim 1, it is characterized in that: described pulse width control circuit comprises the second integrated circuit (U2), 5th resistance (R5), 6th resistance (R6), 7th resistance (R7), one end of described 5th resistance (R5) connects VO1 signal contact, the other end of described 5th resistance (R5) connects the tripod of described second integrated circuit (U2), the crus secunda connection signal VR1 of described second integrated circuit (U2) and one end of described 6th resistance (R6), the other end connecting circuit of described 6th resistance (R6) altogether, first pin of described second integrated circuit (U2) connects one end of described 7th resistance (R7), the other end of described 7th resistance (R7) connects power supply VCC, first pin of described second integrated circuit (U2) is VO2 signal contact.
4. a kind of self-locking type PWM wave generation circuit for measuring long-range calibration equipment according to claim 1, it is characterized in that: described self-locking type PWM wave generation circuit comprises the 3rd integrated circuit (U3), 4th integrated circuit (U4), 5th integrated circuit (U5), 6th integrated circuit (U6), first diode (D1), second diode (D2), second electric capacity (C2), 3rd electric capacity (C3), 8th resistance (R8), 9th resistance (R9), tenth resistance (R10), 11 resistance (R11), 12 resistance (R12), 13 resistance (R13), 14 resistance (R14), 15 resistance (R15), 16 resistance (R16), 17 resistance (R17), one end of described 8th resistance (R8), one end of 13 resistance (R13) is connected and connects VO2 signal contact, the other end of described 8th resistance (R8) connects the tripod of described 3rd integrated circuit (U3), the other end of described 13 resistance (R13) connects described 4th integrated circuit (U4) crus secunda, described 3rd integrated circuit (U3) crus secunda connects one end of described 9th resistance (R9), one end of described 14 resistance (R14) of other end connection of described 9th resistance (R9) and circuit are altogether, the other end of described 14 resistance (R14) connects the tripod of described 4th integrated circuit (U4), described 3rd integrated circuit (U3) first pin connects one end of described tenth resistance (R10), one end of 11 resistance (R11), the negative pole of the first diode (D1), the other end connecting circuit power supply VCC of described tenth resistance (R10), the other end of described 11 resistance (R11) connects the positive pole of described first diode (D1), one end of described second electric capacity (C2), the crus secunda of described 4th integrated circuit (U4), the other end connecting circuit of described second electric capacity (C2) altogether, the tripod connection signal VR2 of described 4th integrated circuit (U4), first pin of described 4th integrated circuit (U4) connects one end of described 12 resistance (R12), one end connecting circuit power supply VCC of described 12 resistance (R12), first pin of described 4th integrated circuit (U4) exports IGBT control signal VO5, described 5th integrated circuit (U5) first pin connects one end of described 15 resistance (R15), one end of 16 resistance (R16), the negative pole of the second diode (D2), the other end connecting circuit power supply VCC of described 15 resistance (R15), the other end of described 16 resistance (R16) connects the positive pole of described second diode (D2), one end of described 3rd electric capacity (C3), the crus secunda of described 6th integrated circuit (U6), the other end connecting circuit of described 3rd electric capacity (C3) altogether, the tripod connection signal VR2 of described 6th integrated circuit (U6), first pin of described 6th integrated circuit (U6) connects one end of described 17 resistance (R17), one end connecting circuit power supply VCC of described 17 resistance (R17), first pin of described 6th integrated circuit (U6) exports IGBT control signal VO6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410716705.3A CN104638884B (en) | 2014-12-02 | 2014-12-02 | A kind of self-locking type PWM wave generation circuits for measuring remote verification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410716705.3A CN104638884B (en) | 2014-12-02 | 2014-12-02 | A kind of self-locking type PWM wave generation circuits for measuring remote verification device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104638884A true CN104638884A (en) | 2015-05-20 |
| CN104638884B CN104638884B (en) | 2017-03-29 |
Family
ID=53217308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410716705.3A Expired - Fee Related CN104638884B (en) | 2014-12-02 | 2014-12-02 | A kind of self-locking type PWM wave generation circuits for measuring remote verification device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104638884B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101388595A (en) * | 2008-01-08 | 2009-03-18 | 上海大学 | PWM pulse controller |
| CN102098030A (en) * | 2009-12-09 | 2011-06-15 | 罗姆股份有限公司 | Semiconductor device and switching regulator using the device |
| CN102224663A (en) * | 2008-11-24 | 2011-10-19 | Itt制造企业公司 | Low voltage power supply |
| CN103208909A (en) * | 2013-04-25 | 2013-07-17 | 国家电网公司 | Pulse-width modulation (PWM) wave generation circuit for controlling on-off of insulated gate bipolar transistor (IGBT) |
| CN104158387A (en) * | 2013-05-13 | 2014-11-19 | 力智电子股份有限公司 | DC-DC controller and operation method of multi-ramp signal thereof |
| CN204538948U (en) * | 2014-12-02 | 2015-08-05 | 国网内蒙古东部电力有限公司电力科学研究院 | A kind of self-locking type PWM wave generation circuit for measuring long-range calibration equipment |
-
2014
- 2014-12-02 CN CN201410716705.3A patent/CN104638884B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101388595A (en) * | 2008-01-08 | 2009-03-18 | 上海大学 | PWM pulse controller |
| CN102224663A (en) * | 2008-11-24 | 2011-10-19 | Itt制造企业公司 | Low voltage power supply |
| CN102098030A (en) * | 2009-12-09 | 2011-06-15 | 罗姆股份有限公司 | Semiconductor device and switching regulator using the device |
| CN103208909A (en) * | 2013-04-25 | 2013-07-17 | 国家电网公司 | Pulse-width modulation (PWM) wave generation circuit for controlling on-off of insulated gate bipolar transistor (IGBT) |
| CN104158387A (en) * | 2013-05-13 | 2014-11-19 | 力智电子股份有限公司 | DC-DC controller and operation method of multi-ramp signal thereof |
| CN204538948U (en) * | 2014-12-02 | 2015-08-05 | 国网内蒙古东部电力有限公司电力科学研究院 | A kind of self-locking type PWM wave generation circuit for measuring long-range calibration equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104638884B (en) | 2017-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103439543B (en) | Realize the apparatus and method of current DC even-order harmonic, subharmonic, odd harmonic | |
| CN204376726U (en) | Ultrasonic Intelligent cleaning machine power-supply system | |
| CN104166063A (en) | Feedback type alternating-current electronic load used for frequency converter aging test | |
| CN204177775U (en) | For the ultrasonic transmit circuit of ultrasonic inspection | |
| CN105583189A (en) | Medicine bottle cleaning system | |
| CN204389062U (en) | A kind of IGBT for Active Power Filter-APF saves warm sample circuit | |
| CN102684518A (en) | High-frequency redundancy PWM (pulse-width modulation) rectifier device and method based on instantaneous current feedforward control | |
| CN202004661U (en) | Driving power source for rare earth giant magnetostrictive transducer | |
| CN204538948U (en) | A kind of self-locking type PWM wave generation circuit for measuring long-range calibration equipment | |
| CN207179901U (en) | A kind of conditioning drive device certainly suitable for ultrasonic atomization piece | |
| CN203396801U (en) | Device for achieving current harmonic and detection and testing device for error influence quantity of watt-hour meter | |
| CN203722483U (en) | Three-phase programmable AC power supply device | |
| CN104638884A (en) | Self-locking PWM (pulse-width modulation) wave generation circuit for measuring remote calibration apparatus | |
| CN101702588A (en) | Synchronous and frequency-doubling jagged carrier generating circuit of high-frequency link matrix type inverter | |
| CN201674406U (en) | High-power switching power supply device | |
| CN203984042U (en) | A kind of super capacitor charge controller | |
| CN102626604A (en) | Chemical catalytic reaction system based on continuous electromagnetic field | |
| CN201663560U (en) | Synchronistic and frequency-doubled saw-toothed carrier generating circuit of high-frequency link matrix inverter | |
| CN204538947U (en) | A kind of for driving the self-locking modulate circuit of the PWM ripple of IGBT | |
| CN203707805U (en) | Charger | |
| CN204258610U (en) | A kind of device can eliminating frequency converter common-mode voltage | |
| CN205081693U (en) | On SG2525 power specialty chip performance period frequency sweep circuit | |
| CN205829155U (en) | Protection circuit | |
| CN103973150B (en) | Current mode inverter | |
| CN204122335U (en) | For the digital imaging system generator that Welded residual stress is eliminated |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170329 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |