CN2187785Y - Electric power changing device for asynchronous power measuring machine - Google Patents
Electric power changing device for asynchronous power measuring machine Download PDFInfo
- Publication number
- CN2187785Y CN2187785Y CN 94238546 CN94238546U CN2187785Y CN 2187785 Y CN2187785 Y CN 2187785Y CN 94238546 CN94238546 CN 94238546 CN 94238546 U CN94238546 U CN 94238546U CN 2187785 Y CN2187785 Y CN 2187785Y
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- CN
- China
- Prior art keywords
- inverter
- controllable silicon
- synchronous rectifier
- phase
- triggers
- 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
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Abstract
The utility model relates to an electric power changing device for asynchronous power measuring machines, which comprises an inverter, a synchronous rectifier, a silicon controlled triggering controller and an asynchronous power measuring machine, wherein, the inverter, in front of which a capacitor and a retardation coil are connected, is a three-phase voltage inverter formed from a self-controlled switching device without constant direct current voltage source. When the capacitor achieves a certain direct current voltage value by being charged gradually, the synchronous rectifier works in an inverting state and changes the direct current voltage into a three-phase alternating current, which is in the same frequency and phase with commercial power to be fed back to an electric network. The utility model solves the problem of a regenerated energy feedback electric network caused by that a voltage source inverter feeds power to the asynchronous power measuring machine, and has the advantages of simple structure, no noise and energy saving.
Description
A kind of power converter that induction dynamometer is used, genus technical field of motors of being used for.
General motor is when technical indicators such as its power of test, torque, usually adopt the direct current power-measuring system of possibility of reversal AC-DC motor genset or the induction dynamometer system that employing is furnished with rotary frequency conversion unit, but have all that noise is big, shortcomings such as complex structure, volume are big, control complexity, adopt the silicon controlled rectifier of silent oscillation at present, though reduced noise, be convenient to operation, but still do not solve the inherent defect that direct current dynamometer produces because of brush and commutator.
The purpose of this utility model is a kind of power converter that does not have the constant dc potential source that is used for the silent oscillation of induction dynamometer of design, and can solve the problem of the Way of Regenerating Energy Feedback electrical network that dynamometer machine produces by the voltage source inverter feed, i.e. noenergy feedback grid when induction dynamometer is unloaded, when load is arranged with the energy feedback grid.
Scheme of the present utility model is to realize like this, what be connected with induction dynamometer is the SPWM three-phase inverter of forming with the autocontrol switch device, before this inverter, be connected with a high capacity Lu ripple capacitor and choke coil, the three-phase alternating current of induction dynamometer output, along with the variation of load from low to high to the large capacitor formation DC voltage of progressively charging, this DC voltage is presented to three-phase inverter, be transformed to three-phase alternating current, provide induction dynamometer to make power supply, simultaneously when the DC voltage on the large capacitor is increased to 450 volts, through connected three-phase controllable silicon synchronous rectifier, work in inverter mode, direct current on the electric capacity is transformed to the synchronous three-phase alternating current of civil power same frequency feeds back to electrical network, synchronous rectifier is by the controllable silicon controller Control work, and controllable silicon controller comprises sampling unit, the given unit of anti-pressure time, timing control unit and flip-flop element.
The utility model has the advantages that the power converter that is used for induction dynamometer of silent oscillation, separated the energy feedback grid problem that the voltage source inverter feed produces to induction dynamometer, it is simple in structure that it is had, easy to use, performance is good, noiselessness, save energy, advantage such as volume is little.
The utility model has following accompanying drawing:
Accompanying drawing 1 is a circuit block diagram.
Accompanying drawing 2 is basic circuit diagrams.
Accompanying drawing 3 is structural representations of the present utility model.
Be described in detail embodiment of the present utility model down in conjunction with the accompanying drawings.
Accompanying drawing 1 is a block scheme of the present utility model, and 1 is inverter among the figure, the 2nd, and synchronous rectifier, the 3rd, controllable silicon triggers controller, and the 4th, induction dynamometer, the 5th, tested asynchronous motor, the 11st, torque sensor, accompanying drawing 2 is basic circuit diagrams, with right side induction dynamometer M
1What connect is the three-phase inverter 1 that constitutes with six autocontrol switch devices, autocontrol switch device IGBT igbt, and its front connects a large capacitor C
dWith choke coil L
d, condenser capacity is 4700 μ F, choke coil L
dBe two water-cooled inductors, capacity is 6mh, and induction dynamometer 4 is 132 kilowatts of asynchronous motors of a Y280M-4, is operated in the generator state of second quadrant, and the three-phase alternating current of its output is through capacitor C
dThe Lu ripple becomes DC voltage, is transformed to three-phase sine wave voltage through inverter 1 and offers induction dynamometer and make power supply, as capacitor C
dOn voltage when being increased to 450 volts, the synchronous rectifier 2 that is connected the front works in inverter mode and C
dOn dc voltage conversion for to feed back to electrical network with the synchronous three-phase alternating current of civil power same frequency, inductance L
dBe used for level and smooth to the feedback electric current, synchronous rectifier 2, triggering controller 3 controls by controllable silicon triggers, make the controllable silicon trigger angle control β of synchronous rectifier=30 °, synchronous rectifier 3 becomes three phase full bridge formula rectifier by six water-cooled KP200A/1200V silicon controlled rectifier Chinese hollys, is connected with a L between synchronous rectifier 3 and the electrical network
1C
2Input Lu ripple device, L
1Be 10 μ H water-cooled inductors, capacitor C
2Capacity be 160 μ F, controllable silicon triggers controller 3 and is made up of as sampling unit 7, the given unit 8 of the best anti-pressure time of controllable silicon, timing control unit 9 and the flip-flop element 10 of input signal isolation six 4N25 optocouplers, sampled signal is taken out synchronous rectifier silicon controlled anti-pressure time, it and given best anti-pressure time in timing control unit 9 relatively back output trigger pulse give trigger element 10, trigger element 10 removes six controllable silicons of triggering synchronous rectifier, L among the figure again by six groups of double pulse generators through six pulse transformers behind power amplifier
HBe mutual inductor, accompanying drawing 3 is perspective view of the present utility model, and 12 among the figure is the complete machine rack, and V and A represent the ammeter of measuring voltage and electric current respectively, and all the other labels illustrate in accompanying drawing 1,2.
Claims (2)
1, the power converter used of a kind of induction dynamometer, comprise inverter (1), synchronous rectifier (2), controllable silicon triggering controller (3) and induction dynamometer (4), tested asynchronous motor (5), it is characterized in that inverter (1) is a three-phase voltage inverter that is made of the autocontrol switch device that does not have the constant dc potential source, synchronous rectifier (2) is formed three-phase controlled bridge rectifier by controllable silicon, it triggers controller (3) control by controllable silicon and triggers, and is connected to large value capacitor C between inverter (1) and the synchronously whole device (2)
dWith choke coil L
d, be connected to L between synchronous rectifier (2) and the electrical network
1C
2Lu ripple device.
2, by the described power converter of claim 1, it is characterized in that controllable silicon triggers controller (3) by sampling unit (7), timing control unit (9), the given unit of back-pressure (8), flip-flop element (10) is formed, sampling unit (7) is made input signal with six optic coupling elements and is isolated, the controllable silicon anti-pressure time is sampled, the given anti-pressure time in it and the given unit of anti-pressure time (8) in timing control unit (9) relatively back output trigger pulse give trigger element (10), and, make controllable silicon trigger angle β=30 ° by flip-flop element (10) output trigger pulse triggers synchronous rectifier controllable silicon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94238546 CN2187785Y (en) | 1994-04-14 | 1994-04-14 | Electric power changing device for asynchronous power measuring machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94238546 CN2187785Y (en) | 1994-04-14 | 1994-04-14 | Electric power changing device for asynchronous power measuring machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2187785Y true CN2187785Y (en) | 1995-01-18 |
Family
ID=33845929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94238546 Expired - Fee Related CN2187785Y (en) | 1994-04-14 | 1994-04-14 | Electric power changing device for asynchronous power measuring machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2187785Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100454741C (en) * | 2007-02-08 | 2009-01-21 | 北京航空航天大学 | Main circuit of converter with input compatibility of single phase and three phase |
| CN103900749A (en) * | 2014-03-05 | 2014-07-02 | 北京欧润特科技有限公司 | Energy-saving type chassis dynamometer |
| CN104242677B (en) * | 2013-06-11 | 2017-06-16 | 艾普斯电源（苏州）有限公司 | Device and method for testing electric equipment |
| CN110308392A (en) * | 2019-07-04 | 2019-10-08 | 哈尔滨工程大学 | The test method of double branch AC magnetoelectric machine mechanical properties |
-
1994
- 1994-04-14 CN CN 94238546 patent/CN2187785Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100454741C (en) * | 2007-02-08 | 2009-01-21 | 北京航空航天大学 | Main circuit of converter with input compatibility of single phase and three phase |
| CN104242677B (en) * | 2013-06-11 | 2017-06-16 | 艾普斯电源（苏州）有限公司 | Device and method for testing electric equipment |
| CN103900749A (en) * | 2014-03-05 | 2014-07-02 | 北京欧润特科技有限公司 | Energy-saving type chassis dynamometer |
| CN110308392A (en) * | 2019-07-04 | 2019-10-08 | 哈尔滨工程大学 | The test method of double branch AC magnetoelectric machine mechanical properties |
| CN110308392B (en) * | 2019-07-04 | 2021-12-21 | 哈尔滨工程大学 | Method for testing mechanical characteristics of double-branch AC permanent magnet motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |