CN2358632Y - High frequency magnetic coupler for electric-driven controller - Google Patents
High frequency magnetic coupler for electric-driven controller Download PDFInfo
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- CN2358632Y CN2358632Y CN98251132U CN98251132U CN2358632Y CN 2358632 Y CN2358632 Y CN 2358632Y CN 98251132 U CN98251132 U CN 98251132U CN 98251132 U CN98251132 U CN 98251132U CN 2358632 Y CN2358632 Y CN 2358632Y
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- high frequency
- triode
- field effect
- power
- circuit
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Abstract
The utility model discloses a high frequency magnetic coupler for an electric controller, which comprises a modulation circuit which is composed of a D trigger and a power amplifier, a coupling circuit which is composed of a high frequency transformer and a demodulation circuit which is composed of a detector and a power field effect tube, wherein, the Q end and the /Q end of the D trigger are respectively connected with the respective input end of the power amplifier, and meanwhile the /Q end of the D trigger is connected with the D end; the output end of the power amplifier is connected with the primary end of the high frequency transformer, and the secondary end of the high frequency transformer is connected with the detector. The utility model has high switching speed, reliable operating performance and simple structure of driving power supply.
Description
The utility model belongs to driven by power automatic control technology field, relates to a kind of high frequency magnetic coupler, particularly a kind of high frequency magnetic coupler that can use in electric driving governor.
PWM (pulse-width modulation type) bridge driver is the important component part of servo-control system, and since the eighties, the power drive system that is applied to astronomical instrument adopts power transistor (GTR pipe) usually.Along with the development of automatic control, power electronic technology, at present, the field of electric drive of the middle low power power field effect pipe that do as one likes can be more advanced gradually (VMOS pipe), insulated gate thyristor (IGBT pipe) replace.Although occurred third generation power electronic device at present---power integrated circuit (Power IC), utilize power field effect pipe (VMOS pipe) and insulated gate thyristor (IGBT pipe) to remain the main application device of middle low power electric drive.
Current, adopt the major defect of the grid control circuit commonly used of power field effect pipe and insulated gate thyristor to show the following aspects:
1, in the bridge-type pwm driver that adopts optical coupler, the switching speed of the optical coupling of four brachium pontis can not be in full accord, can produce disturbing pulse, interference calculation machine work sometimes.
2, rising edge is poor, must carry out the edge shaping, has increased each brachium pontis power device switching speed inconsistency.
3, three groups of accessory power supplys be to increase, thereby the volume and the cost of controller increased.
4, in the occasion that adopts transistor or integrated circuit as grid control circuit, control circuit and drive circuit altogether, particularly in the PWM driving governor, because drive motors has bigger inductance value, in transient process, produce spike, will influence the operate as normal of control circuit.
In recent years, external integrated circuit manufacturer has released the application-specific integrated circuit (ASIC) of many kinds, but since price more expensive, be difficult for buying and maintenance difficult less application under general occasion.
The purpose of this utility model is to provide a kind of high frequency magnetic coupler that uses in the servo system of middle low power, to overcome existing weak point in the prior art.
Task of the present utility model is finished in the following manner, a kind of electric driving governor high frequency magnetic coupler, it includes modulation circuit, coupling circuit and demodulator circuit, its key is that described modulation circuit is made of d type flip flop and power amplifier, the Q of d type flip flop end and/the Q end joins with the input of separately power amplifier respectively, simultaneously d type flip flop /the Q end holds with D and is connected, described coupling circuit is made of high frequency transformer, described demodulator circuit is made of reflect ripple device and power field effect pipe or insulated gate thyristor, the elementary of the output of power amplifier and high frequency transformer joined, and the secondary of high frequency transformer then joined with wave detector.
Above-mentioned power amplifier can be that transistor is drawn the formula power amplifier mutually, also can adopt the IC integrated power amplifier.
When power amplifier is a transistor when drawing the formula power amplifier mutually, the Q of d type flip flop end is by base resistance R
1With triode N
1, P
1Base stage join, d type flip flop /concurrent of Q end and D end is also by another base resistance R
2With triode N
2, P
2Base stage join triode N
1, P
1With triode N
2, P
2Emitter connect the elementary of high frequency transformer, triode N
1With triode N
2Collector electrode connect positive source, and triode P
1With triode P
2Grounded collector.
Above-mentioned mirror ripple device can be the high-frequency diode full-wave rectifying circuit, also can adopt any passive or active mirror ripple device.
When mirror ripple device is the high-frequency diode full-wave rectifying circuit, secondary and the input high-frequency diode full-wave rectifying circuit of high frequency transformer joins, and the grid of the output of high-frequency diode full-wave rectifying circuit and power field effect pipe or insulated gate thyristor and source electrode join, simultaneously an electric capacity also in parallel and a resistance between the grid of power field effect pipe or insulated gate thyristor and source electrode, described electric capacity can be referred to as filter capacitor, and described resistance can be referred to as load resistance.
Influence (it degenerates pulse back edge) for edge behind the grid that solves power field effect pipe or insulated gate thyristor and the interelectrode capacitance paired pulses between the source electrode, therefore be preferably in positive-negative-positive triode of inverse parallel on the grid return of power field effect pipe or insulated gate thyristor, can make like this before and after the pulse after the detection along steeper, with the quick conducting of guaranteed output field effect transistor or insulated gate thyristor with end.
Owing to adopted the method for high frequency modulated, solved the saturation problem that high frequency transformer is produced when changing the pulse-width modulation signal, thereby also overcome the problem that causes transformer time extremely resulting signal size change effectively, high frequency transformer can be used in the driven by power automation field.
Below in conjunction with accompanying drawing shown in the embodiment the utility model is described in further detail.
Fig. 1 is an electrical block diagram of the present utility model;
Fig. 2 is a kind of application example schematic diagram of the present utility model.
With reference to Fig. 1, when requiring power field effect pipe M
1, M
4During conducting, then controlling signal is through a Schmidt trigger U
1: the A shaping is added to d type flip flop U later on
2: the S end of A and R end, d type flip flop U
2: A is connected into the form of flip and flop generator, as d type flip flop U
2: when the S end of A and R end are low level, d type flip flop U
2: A just is in the bistable state rollover states, at d type flip flop U
2: added the multi-harmonic-oscillations pulse of a 1MHz on the clock end CLK of A, at this moment at d type flip flop U
2: the Q of A end and/the Q end just obtained a 500KC square wave frequency that phase place is opposite, base resistance R
1, R
2With triode N
1, P
1With triode N
2, P
2Form a transistor and draw the formula power amplifier mutually, to obtain several milliamperes power, triode N
1, P
1With triode N
2, P
2Emitter obtains is the different power level of level all the time, as triode N
1, P
1Emitter when being high level, triode N then
2, P
2Emitter be low level, high frequency transformer T
1Electric current from top to bottom, otherwise, high frequency transformer T
1Electric current from bottom to top, like this at high frequency transformer T
1Elementary winding on just obtained an alternating voltage, through high frequency transformer T
1Coupling is at high frequency transformer T
1Two secondary equal and opposite in directions that obtain, pulse frequency is identical, the profiled pulses that pulse envelope equates with the pulsewidth of controlling signal, D
1And D
2Be two mirror ripple devices, the mirror ripple device D in the present embodiment
1, D
2Be the high-frequency diode full-wave rectifying circuit, C
1And C
2Be filter capacitor, in resistance R
5, R
6On can obtain voltage signal, by detection and filtering, at power field effect pipe M
1, M
4Grid obtained a voltage consistent with the controlling signal pulsewidth, its magnitude of voltage is greater than power field effect pipe M
1, M
4Cut-in voltage, generally can be controlled at+6V～+ 10V between.From Fig. 1, it can also be seen that, at power field effect pipe M
1, M
4Grid return on inverse parallel a positive-negative-positive triode P is arranged
5, P
6, simultaneously at triode P
5, P
6Base stage and emitter between forward serial connection diode K respectively
1, K
2, to solve power field effect pipe M
1, M
4Grid and the interelectrode capacitance paired pulses between the source electrode after the influence (it degenerates pulse back edge) on edge, can make like this before and after the pulse after the detection along steeper, with guaranteed output field effect transistor M
1, M
4Quick conducting and end.As power field effect pipe M
1, M
4When being in conducting state, motor M D
1Get electric rotation; And power field effect pipe M
1, M
4When being in cut-off state, motor M D
1The outage stall.
With reference to Fig. 2, used two groups of identical high frequency magnetic couplers in the present embodiment, electric drive controlling signal can obtain the pulsewidth signal that phase place difference, width do not wait by single-chip microcomputer or pulse-width modulation circuit, controls the power field effect pipe M of H bridge four arms respectively
1, M
4And M
2, M
3Conducting and end, the phase place and the width that change pulse promptly can change DC motor MD
1Turn to and speed.
The concrete course of work of the present utility model is summarized as follows:
1, modulation: the pulsewidth signal is modulated by D flip-flop, modulating frequency is 1MC, when the pulsewidth signal, S, the R end of control D flip-flop makes it be in the bistable alternately operating state of upset, at this moment, Q and/Q end produces the alternation signal of the 500KHz of out of phase respectively, this alternation signal by in addition power amplification of push pull transistor (when adopting integrated circuit, then carry out power amplification) by integrated circuit, when no signal, Q and/Q is constant, then the coupling transformer no current flows through.
2, coupling: owing to obtained the power signal (drive current be approximately several milliampere) of the 500KHz of alternation, all obtained two envelope alternation pulsewidth signals with the same width of pulsewidth signal at two utmost points of transformer like this at the first utmost point of transformer.When controlling signal is low level, first signal output.
3, demodulation: the envelope alternation signal that obtains the 500KHz of modulation at the inferior utmost point of transformer, filtering through high frequency detection (rectification) and simple capacitor C, can obtain to have the pulse voltage of same width with input control voltage, its voltage swing is advisable can open power field effect pipe, is generally 6V～10V.
Discharge the loop owing in this demodulator circuit, increased the transistor of positive-negative-positive as electric charge, can obtain the pulse edge of steeper this moment, so can effectively overcome because of what the interelectrode capacitance of filter capacitor and power field effect pipe (perhaps insulated gate thyristor) was brought and make the back of this pulse along bad, the shortcoming that discharge time is long, thereby the utility model can satisfy the application in the electric drive controlling fully.
The utility model also can be used for the driver of alternating current machine, brshless DC motor and stepping motor.
This electric driving governor is very fast owing to switching speed with the high frequency magnetic coupler, after being applied to drive circuit, the power loss of power field effect pipe or insulated gate thyristor is minimum, so can guarantee self not generate heat, can omit cooling fan commonly used, and the power transmission efficiency height.
Because high frequency transformer is a kind of high reliability ferrite device, the overload capacity of lead is very strong, and low frequency and dc signal can not be coupled to the power control end, so improved the reliability of electric driving control system.Usually the fault of electric driving control system seldom appears at control section, and its source of damage major part is in power section, the interference effect of any outside.The disturbing pulse that produces, can produce conducting when the false triggering of power field effect pipe or insulated gate thyristor caused the H bridge, thereby cause the damage of power tube, after having adopted the modulation-demo-demodulation method method, this phenomenon just no longer produces, and any harmful disturbing pulse all will fall filtered in the high frequency magnetic coupler.
Magnetic coupler can be isolated control voltage and driving voltage well, and its effect is better than optical coupler, and it has temperature characterisitic preferably, and frequency response is higher, and is also low to the requirement of excitation power supply and power.
Adopted the Drive and Control Circuit behind the utility model, the voltage energy of its driving power field effect transistor is from high frequency transformer, and high frequency transformer is to obtain excitatory by the control power supply, power field effect pipe is again a kind of voltage devices, and its driving power is very little, can omit the prerequisite three groups of grids control accessory power supply in the common circuit like this, the structure of driving power is simplified greatly, reduced power transformer and other element, volume reduces greatly, and cost is also very cheap.
Claims (5)
1, a kind of electric driving governor high frequency magnetic coupler, it includes modulation circuit, coupling circuit and demodulator circuit, it is characterized in that described modulation circuit is made of d type flip flop and power amplifier, the Q of d type flip flop end and/the Q end joins with the input of separately power amplifier respectively, simultaneously d type flip flop /the Q end holds with D and is connected, described coupling circuit is made of high frequency transformer, described demodulator circuit is made of reflect ripple device and power field effect pipe or insulated gate thyristor, the elementary of the output of power amplifier and high frequency transformer joined, and the secondary of high frequency transformer then joined with wave detector.
2, according to the electric driving governor high frequency magnetic coupler of claim 1 regulation, it is characterized in that above-mentioned power amplifier is that transistor is drawn the formula power amplifier mutually, the Q end of described d type flip flop is by base resistance R
1With triode N
1, P
1Base stage join, d type flip flop /concurrent of Q end and D end is also by another base resistance R
2With triode N
2, P
2Base stage join triode N
1, P
1With triode N
2, P
2Emitter connect the elementary of high frequency transformer, triode N
1With triode N
2Collector electrode connect positive source, and triode P
1With triode P
2Grounded collector.
3, according to claim 1 or the 2 electric driving governor high frequency magnetic couplers of stipulating, it is characterized in that above-mentioned mirror ripple device is the high-frequency diode full-wave rectifying circuit, secondary and the input high-frequency diode full-wave rectifying circuit of described high frequency transformer joins, and the grid of the output of high-frequency diode full-wave rectifying circuit and power field effect pipe or insulated gate thyristor and source electrode join, simultaneously an electric capacity also in parallel and a resistance between the grid of power field effect pipe or insulated gate thyristor and source electrode.
4, according to the electric driving governor high frequency magnetic coupler of claim 1 or 2 regulations, it is characterized in that inverse parallel has a positive-negative-positive triode on the grid return of power field effect pipe or insulated gate thyristor.
5, according to the electric driving governor high frequency magnetic coupler of claim 3 regulation, it is characterized in that inverse parallel has a positive-negative-positive triode on the grid return of power field effect pipe or insulated gate thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98251132U CN2358632Y (en) | 1998-12-29 | 1998-12-29 | High frequency magnetic coupler for electric-driven controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98251132U CN2358632Y (en) | 1998-12-29 | 1998-12-29 | High frequency magnetic coupler for electric-driven controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2358632Y true CN2358632Y (en) | 2000-01-12 |
Family
ID=33995367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98251132U Expired - Fee Related CN2358632Y (en) | 1998-12-29 | 1998-12-29 | High frequency magnetic coupler for electric-driven controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2358632Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997420A (en) * | 2010-11-11 | 2011-03-30 | 江苏大学 | Asymmetric half-bridge magnetic coupling drive circuit |
| CN102231595A (en) * | 2011-07-06 | 2011-11-02 | 深圳市英威腾电气股份有限公司 | Drive circuit of insulated gate bipolar transistor |
| CN103280948A (en) * | 2013-06-05 | 2013-09-04 | 广州金升阳科技有限公司 | Impulse modulation magnetic separation drive circuit |
| CN103312132A (en) * | 2013-07-02 | 2013-09-18 | 上海沪工焊接集团股份有限公司 | Driving circuit for inverter welding power source |
| CN107231144A (en) * | 2017-05-08 | 2017-10-03 | 西门子公司 | Servo-driver |
| CN111371294A (en) * | 2020-04-03 | 2020-07-03 | 宁波安信数控技术有限公司 | Frequency spectrum shifting MOS drive circuit and method based on digital banner technology |
| CN111817622A (en) * | 2020-06-30 | 2020-10-23 | 南京长亚轨道交通科技有限公司 | Brush motor long tail type H-bridge driving circuit |
-
1998
- 1998-12-29 CN CN98251132U patent/CN2358632Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997420A (en) * | 2010-11-11 | 2011-03-30 | 江苏大学 | Asymmetric half-bridge magnetic coupling drive circuit |
| CN102231595A (en) * | 2011-07-06 | 2011-11-02 | 深圳市英威腾电气股份有限公司 | Drive circuit of insulated gate bipolar transistor |
| CN102231595B (en) * | 2011-07-06 | 2013-08-07 | 深圳市英威腾电气股份有限公司 | Drive circuit of insulated gate bipolar transistor |
| CN103280948A (en) * | 2013-06-05 | 2013-09-04 | 广州金升阳科技有限公司 | Impulse modulation magnetic separation drive circuit |
| CN103280948B (en) * | 2013-06-05 | 2016-04-20 | 广州金升阳科技有限公司 | A kind of impulse modulation magnetic separation drive circuit |
| CN103312132A (en) * | 2013-07-02 | 2013-09-18 | 上海沪工焊接集团股份有限公司 | Driving circuit for inverter welding power source |
| CN103312132B (en) * | 2013-07-02 | 2016-04-27 | 上海沪工焊接集团股份有限公司 | For the drive circuit of inversion welding source |
| CN107231144A (en) * | 2017-05-08 | 2017-10-03 | 西门子公司 | Servo-driver |
| US11163285B2 (en) | 2017-05-08 | 2021-11-02 | Siemens Aktiengesellschaft | Servo driver |
| CN111371294A (en) * | 2020-04-03 | 2020-07-03 | 宁波安信数控技术有限公司 | Frequency spectrum shifting MOS drive circuit and method based on digital banner technology |
| CN111817622A (en) * | 2020-06-30 | 2020-10-23 | 南京长亚轨道交通科技有限公司 | Brush motor long tail type H-bridge driving circuit |
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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 |