CN2718894Y - Electromagnetic bearing power amplifier utilizing PWM amplifier - Google Patents
Electromagnetic bearing power amplifier utilizing PWM amplifier Download PDFInfo
- Publication number
- CN2718894Y CN2718894Y CNU2004200523542U CN200420052354U CN2718894Y CN 2718894 Y CN2718894 Y CN 2718894Y CN U2004200523542 U CNU2004200523542 U CN U2004200523542U CN 200420052354 U CN200420052354 U CN 200420052354U CN 2718894 Y CN2718894 Y CN 2718894Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- amplifier
- pwm
- bridge
- power
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0444—Details of devices to control the actuation of the electromagnets
- F16C32/0457—Details of the power supply to the electromagnets
Landscapes
- Amplifiers (AREA)
Abstract
The utility model discloses an electromagnetic bearing power amplifier utilizing PWM amplifier, which relates to circuit portions of an H bridge circuit composed of a power switch device, the power switch device, a low-pass filter, a head amplifier, a current sample circuit, a PWM wave created circuit, etc. Here the low-pass filter is basically the same as the general low-pass filter, and chiefly relates to the H bridge circuit composed of the power switch device and the energy amplification function of the power switch device. The incoming signal compared with the high-frequency triangular wave obtains a pulse width modulated wave. The PWM wave obtained by the modulation drives the four power switches of the H bridge circuit composed of the power switch device, and the output of the PWM is obtained. Through filtering off the radio-frequency component by the low-pass filter, the wave output in directly proportion to the incoming signal is obtained. The H bridge circuit adopting serial construction has an individual power supply and loads that the current sample circuit is arranged between the head amplifier and the H bridge circuit. The utility model has the advantages of good wave-shaped of the power amplifier, reliable operation, fixed switching frequency, easy implementation, etc.
Description
Technical field: the utility model relates to power electronic technology, relates in particular to a kind of electromagnetic bearing power amplifier of the PWM of employing amplifier.
Background technology: make power amplifier to electromagnetic axis in the prior art, technology that Chinese patent 95245561.7 discloses a kind of " electromagnetic bearing of no auxiliary bearing ", solved because of the armature spindle of generation under start and stop, power down or the fortuitous event and the friction problem of bearing, but owing to do not adopt a plurality of H bridge series connection to realize the electromagnetic bearing power amplifier technology of multipleization output, so cause switching frequency that fluctuation is arranged, it is unreliable to work.
The utility model content: the purpose of this utility model is, in order to overcome the deficiencies in the prior art part, a kind of electromagnetic bearing power amplifier of the PWM of employing amplifier is provided, and just a kind of PWM amplifier of a plurality of H bridge series connection that adopts is made electromagnetic bearing power amplifier.This power amplifier waveform is good, reliable operation, and switching frequency is fixed, and realizes easily.A kind of electromagnetic bearing power amplifier that adopts the PWM amplifier described in the utility model includes partial circuits such as H bridge circuit, device for power switching, low pass filter, preamplifier, current sampling circuit and the PWM ripple generative circuit composition that set of power switches becomes.Low pass filter described here and common low pass filter are basic identical, and what relate generally to is the H bridge circuit of set of power switches one-tenth and the power amplification effect of device for power switching.A kind of electromagnetic bearing power amplifier that adopts the PWM amplifier described in the utility model, the operation principle of amplifier is that input signal is compared with high frequency triangle wave, obtain pulse width modulated wave, four power switchs of the H bridge circuit that the PWM ripple driving power switching device that obtains with modulation is formed, amplification through this circuit, promptly obtain PWM output, filter the high frequency composition through low pass filter then, the waveform that last out output obtains being directly proportional with input signal is exported.Its key point is, the H bridge circuit is become by four set of power switches, and the H bridge circuit adopts cascaded structure, and a plurality of H bridge series connection realize multipleization output, each H bridge has independent power supply power supply during series connection, is provided with current sampling circuit between out load and preamplifier.
When if amplifier requires output voltage higher, adopt two or more H bridge series connection, the carrier wave of each H bridge differs from a suitable angle mutually, obtain the output of multipleization, each H bridge adopts independent current source, with two H bridge series connection is example, at this moment adopt two or more H bridge circuit series connection, link between the e point of two H bridges and the f point and played H bridge series connection effect, with the PWM ripple that modulation obtains, drive the grid of 8 device for power switching of H bridge respectively, require the carrier wave of each H bridge to differ from a suitable angle mutually, such purpose is the output that obtains multipleization, but each H bridge must adopt independent current source, and power supply A and power supply B power respectively, if the H bridge is many, voltage need power supply also many, so that can superpose.The PWM ripple that contains the high frequency composition after obtaining amplifying needs low pass filter to filter the high frequency composition equally, and at this moment the waveform between 2 of c, the d is exactly the PWM waveform after amplifying.Filter the high frequency composition through low pass filter, out output has just obtained forming with incoming wave the waveform of the amplification of direct ratio.
The PWM amplifier of total a plurality of H bridge series connection is done the circuit of electromagnetic bearing power amplifier and is formed, after the input signal input, after preamplifier and PWM ripple generative circuit, obtained the PWM ripple, respectively the power device in the H bridge circuit of driving power switching device composition.Filter radio-frequency component through low pass filter, the current signal in the out output to preamplifier circuit, carries out Treatment Analysis through the current sampling circuit negative feedback again, forms closed-loop process.Contain preamplifier in the utility model, the operation principle of PWM generative circuit is that input signal is compared with high frequency triangle wave, PWM ripple after obtaining modulating, with the PWM ripple after the modulation, drive the grid of main power circuit, filter the high frequency composition, between low pass filter and out output, installed current sampling device additional through low pass filter, current sampling signal is fed back in the preamplifier, carry out the closed loop waveform processing.Last output is exactly the said waveform that does not contain after the high frequency composition and the amplification that input signal is directly proportional of the utility model.It is current source that the electromagnetic bearing amplifier requires power amplifier, and current source characteristic is guaranteed by the closed loop current negative feedback.Structure with a plurality of H bridge series connection is done electromagnetic bearing power amplifier, can realize multipleization output, can make the power amplifier waveform good, reliable operation, and switching frequency is fixed, advantages such as easy realization.
Description of drawings: accompanying drawing 1 is the main loop circuit figure of single H bridge of the electromagnetic bearing power amplifier of a kind of PWM of employing amplifier described in the utility model; Accompanying drawing 2 is electromagnetic bearing power amplifiers of a kind of PWM of employing amplifier described in the utility model, when requiring output voltage higher, by the main loop circuit figure of two or more H bridge circuit series connection; Accompanying drawing 3 is circuit theory diagrams of the electromagnetic bearing power amplifier general structure of a kind of PWM of employing amplifier described in the utility model.1-input signal 2-preamplifier 3-PWM ripple generative circuit 4-master's power circuit (being the H bridge circuit) 5-low pass filter 6-out load 7-current sampling circuit 8-H bridge circuit 9-device for power switching
Embodiment: referring now to accompanying drawing 1,2 and 3, be described as follows in conjunction with the embodiments: the electromagnetic bearing power amplifier of a kind of PWM of employing amplifier described in the utility model includes input signal 1, preamplifier 2, PWM ripple generative circuit 3, main power circuit 4, low pass filter 5, out load 6, current sampling circuit 7, H bridge circuit 8 and device for power switching 9 and forms.Said H bridge circuit 8 relates to by device for power switching 9 to be formed.Connect preamplifier 2 behind the input signal 1, connect PWM ripple generative circuit 3 behind the preamplifier 2, connect main power circuit 4 behind the PWM ripple generative circuit 3, main power circuit 4 is connected with low pass filter 5 again.Low pass filter 5 is connected with out load 6, between low pass filter 5 and out load 6, is connected with current sampling circuit 7 again, and current sampling circuit 7 returns again, is connected with preamplifier 2.Key point is, H bridge circuit 8 is become by four set of power switches, and the H bridge circuit adopts cascaded structure, and cascaded structure can be realized multipleization output, each H bridge has independent power supply power supply during series connection, is provided with current sampling circuit 7 between out load 6 and preamplifier 2.Low pass filter 5 described here and common low pass filter are basic identical, and what relate generally to is the H bridge circuit 8 of device for power switching 9 compositions and the power amplification effect of device for power switching.A kind of electromagnetic bearing power amplifier that adopts the PWM amplifier described in the utility model, the operation principle of amplifier is that input signal 1 is compared with high frequency triangle wave, obtain pulse width modulated wave, four power switchs of the H bridge circuit 8 that the PWM ripple driving power switching device 9 that obtains with modulation is formed, amplification through this circuit, the PWM that promptly obtains amplifying exports, and filters the high frequency composition through low pass filter 5 then, obtains the waveform output that is directly proportional with input signal 1.When if amplifier requires output voltage higher, adopt two or more H bridge series connection, the carrier wave of each H bridge differs from a suitable angle mutually, obtain the output of multipleization, each H bridge adopts independent current source, with two H bridge series connection is example, can adopt two or more H bridge circuit series connection, link between the e point of two H bridges and the f and played the effect of H bridge series connection, with the PWM ripple that modulation obtains, drive the grid of 8 device for power switching of H bridge respectively, require the carrier wave of each H bridge to differ from a suitable angle mutually, such purpose is the output that obtains multipleization, but each H bridge must adopt independent current source, is powered respectively by power supply A and power supply B, if the H bridge is many, voltage need power supply also many, so that can superpose.At this moment the waveform that obtains between 2 of c, the d is exactly the PWM ripple that contains the high frequency composition after amplifying, and needs low pass filter to filter the high frequency composition equally, last out output 6 waveforms that obtain be exactly with the amplification that is entered as direct ratio after waveform.The PWM amplifier of total a plurality of H bridge series connection is done the electromagnetic bearing power amplifier circuit and is formed, after the input signal input, after preamplifier and PWM ripple generative circuit, obtained the PWM ripple, the power device in the H bridge circuit that difference driving power switching device is formed, just main power device 4, filter radio-frequency component through low pass filter 5, current signal in the out load to preamplifier circuit, carries out Treatment Analysis through the current sampling circuit negative feedback again, forms closed-loop process.The preamplifier 2 that is contained in the utility model, the operation principle of PWM generative circuit 3 is that input signal is compared with high frequency triangle wave, PWM ripple after obtaining modulating, with the PWM ripple after the modulation, drive the grid of main power circuit, filter the high frequency composition through low pass filter, last output is exactly the forming process of the signal waveform that does not contain the high frequency composition after the described amplification of Fig. 1 and Fig. 2, between low pass filter and out load (output just), installed current sampling device additional, current sampling signal is fed back in the preamplifier, carry out the closed loop waveform processing.So just obtained with the amplification that is entered as direct ratio after waveform.It is current source that the electromagnetic bearing amplifier requires power amplifier, and current source characteristic is guaranteed by the closed loop current negative feedback.This device of electromagnetic bearing power amplifier with a plurality of H bridge series connection just can make the power amplifier waveform good, reliable operation, and switching frequency is fixed, advantages such as easy realization.
1 be described as follows with reference to the accompanying drawings, a kind of electromagnetic bearing power amplifier that adopts the PWM amplifier, just adopt the PWM amplifier of a plurality of H bridge series connection to do electromagnetic bearing power amplifier, the PWM wavelength-division that obtains with modulation does not drive after grid G 1, G2, G3 and the G4 of four device for power switching, the output of the PWM waveform that contains radio-frequency component that has promptly obtained between a and the b amplifying, filter the high frequency composition through low pass filter 5, so promptly obtained the waveform output of the amplification that is directly proportional with input signal 1.With reference to accompanying drawing 2, a kind of electromagnetic bearing power amplifier that adopts the PWM amplifier described in the utility model, when amplifier requires output voltage higher, the H bridge circuit series connection that requirement is become by two or more set of power switches, accompanying drawing 2 is exactly the circuit diagram of H bridge series connection major loop, be example with two H bridge circuits in the accompanying drawing 2, include identical two H bridge circuits, 8 identical device for power switching and a low pass filter are arranged.Job requirement is, when amplifier requires output voltage higher, at this moment adopt two or more H bridge circuit series connection, link between the e point of two H bridges and the f and played the effect of H bridge series connection, the PWM ripple that obtains with modulation, drive the grid of 8 device for power switching of H bridge respectively, require the carrier wave of each H bridge to differ from a suitable angle mutually, such purpose is the output that obtains multipleization, but each H bridge must adopt independent current source, is powered respectively by power supply A among Fig. 2 and power supply B, if the H bridge is many, voltage need power supply also many, so that can superpose.At this moment the waveform that obtains between 2 of c, the d is exactly the PWM ripple that contains the high frequency composition after amplifying, and needs low pass filter to filter the high frequency composition equally, last output waveform, the waveform that is directly proportional with input signal 1 after amplifying exactly.With reference to accompanying drawing 3, this is the general construction electrical schematic diagram of the electromagnetic bearing power amplifier of a kind of PWM of employing amplifier described in the utility model.Be described as follows referring now to accompanying drawing 3: contain preamplifier 2 in the accompanying drawing 3, the operation principle of PWM ripple generative circuit 3 is that input signal 1 is compared with high frequency triangle wave, PWM ripple after obtaining modulating, with the PWM ripple after the modulation, drive the grid of main power circuit 4 (being the H bridge circuit), filter the high frequency composition through low pass filter 5, last output is exactly the forming process of the signal waveform that does not contain the high frequency composition after the described amplification of Fig. 1 and Fig. 2, between low pass filter 5 and out load (output just), be provided with current sampling circuit 7, current sampling signal is fed back in the preamplifier 2, carry out the closed loop waveform processing.Waveform after so just having obtained amplifying.This waveform is used on the electromagnetic bearing power amplifier, and it is good just to have obtained the power amplifier waveform, reliable operation, and switching frequency is fixed, advantages such as easy realization.
Claims (2)
1, a kind of electromagnetic bearing power amplifier that adopts the PWM amplifier, including preamplifier (2), PWM ripple generative circuit (3), main power circuit is that H bridge circuit (4) and low pass filter (5) are formed, it is characterized in that the H bridge circuit is become by four set of power switches, adopt a plurality of H bridge series connection to realize the structure of multipleization output, each H bridge is provided with independent power supply during series connection, is provided with current sampling circuit (7) between out load and preamplifier.
2, a kind of electromagnetic bearing power amplifier that adopts the PWM amplifier according to claim 1, it is characterized in that connecing preamplifier (2) behind the input signal (1), connect PWM ripple generative circuit (3) behind the preamplifier (2), connect main power circuit (4) behind the PWM ripple generative circuit (3), main power circuit (being the H bridge circuit) (4) is connected with low pass filter (5) again, is connected with current sampling circuit (7) between preamplifier (2) and the low pass filter (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200523542U CN2718894Y (en) | 2004-07-17 | 2004-07-17 | Electromagnetic bearing power amplifier utilizing PWM amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200523542U CN2718894Y (en) | 2004-07-17 | 2004-07-17 | Electromagnetic bearing power amplifier utilizing PWM amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2718894Y true CN2718894Y (en) | 2005-08-17 |
Family
ID=34893350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200523542U Expired - Fee Related CN2718894Y (en) | 2004-07-17 | 2004-07-17 | Electromagnetic bearing power amplifier utilizing PWM amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2718894Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101038811B (en) * | 2007-04-04 | 2011-05-04 | 山东新风光电子科技发展有限公司 | Device for novel electromagnetic bearing power amplifier |
| CN102508433A (en) * | 2011-11-06 | 2012-06-20 | 北京航空航天大学 | Method for compensating digital control delay of magnetic bearing switch power amplifier |
| CN102799125A (en) * | 2012-08-22 | 2012-11-28 | 清华大学 | Control method and control system for inhibiting high-frequency oscillation of magnetic bearing system |
| CN105048838A (en) * | 2015-06-29 | 2015-11-11 | 浙江大学 | Single-side bridge arm frequency-doubling driving three-level switch power amplifier |
| CN106160677A (en) * | 2016-06-16 | 2016-11-23 | 长沙湘计海盾科技有限公司 | A kind of carried shift PWM modulation type digital power amplifier and power-magnifying method |
-
2004
- 2004-07-17 CN CNU2004200523542U patent/CN2718894Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101038811B (en) * | 2007-04-04 | 2011-05-04 | 山东新风光电子科技发展有限公司 | Device for novel electromagnetic bearing power amplifier |
| CN102508433A (en) * | 2011-11-06 | 2012-06-20 | 北京航空航天大学 | Method for compensating digital control delay of magnetic bearing switch power amplifier |
| CN102799125A (en) * | 2012-08-22 | 2012-11-28 | 清华大学 | Control method and control system for inhibiting high-frequency oscillation of magnetic bearing system |
| CN105048838A (en) * | 2015-06-29 | 2015-11-11 | 浙江大学 | Single-side bridge arm frequency-doubling driving three-level switch power amplifier |
| CN105048838B (en) * | 2015-06-29 | 2017-12-15 | 浙江大学 | A kind of tri-level switch power amplifier of unilateral bridge arm frequency multiplication driving |
| CN106160677A (en) * | 2016-06-16 | 2016-11-23 | 长沙湘计海盾科技有限公司 | A kind of carried shift PWM modulation type digital power amplifier and power-magnifying method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2005074413A3 (en) | Class e amplifier with inductive clamp | |
| CN1841900B (en) | Switching regulator circuit | |
| CN2718894Y (en) | Electromagnetic bearing power amplifier utilizing PWM amplifier | |
| EP1447908A4 (en) | Power amplifier | |
| CN103326579B (en) | Magnetic isolation feedback circuit | |
| US6778012B2 (en) | Polyphase impedance transformation amplifier | |
| WO2003044944A1 (en) | A new tyre digital audio power amplifier | |
| CN100346363C (en) | Passive electromagnetic isolated signal converter | |
| CN219268125U (en) | Laser control circuit | |
| CN103248225B (en) | Power supply change-over device, power conversion unit changing method and electronic equipment | |
| CN102255513B (en) | Bridge type synchronous rectification circuit | |
| CN104955201B (en) | Illumination drive device and method therefor | |
| CN206098077U (en) | Current drive's electromagnetic actuator control system | |
| CN2847646Y (en) | High frequency charger with constant voltage and constant control circuit | |
| CN106774583B (en) | A kind of voltage output control system that there is high-precision and efficiently respond | |
| CN219351524U (en) | MOS drive circuit | |
| CN202948357U (en) | Constant-current constant-power implementation circuit | |
| EP1463204A1 (en) | A method of impulse acreage modulation digital power processing and its device | |
| CN201341093Y (en) | Switching power supply device using piezoelectric transformer | |
| CN212305191U (en) | Voice coil motor force control driving circuit | |
| CN214592072U (en) | Device for controlling LED brightness by using voltage | |
| CN111294027A (en) | Current-limiting protection circuit for protecting electronic switch | |
| CN206364374U (en) | A kind of semiconductor laser drive power based on Vicor modules | |
| EP0197704A3 (en) | Electric signal amplifiers | |
| CN2497486Y (en) | Switch type field regulator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANDONG XINFENGGUANG ELECTRONIC SCIENCE DEVELOPM Free format text: FORMER OWNER: FENGGUANG ELECTRONIC LLC, SHANDONG Effective date: 20050930 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20050930 Address after: 272500 Shandong city of Jining province Wenshang County Plaza Road No. 2 Patentee after: Shandong Xinfeng Photoelectric Science & Technology Development Co., Ltd. Address before: 272500 Shandong city of Jining province Wenshang County Plaza Road No. 2 Patentee before: Shandong Fengguang Electronics Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050817 Termination date: 20130717 |