CN106253234B - Inverter control circuit - Google Patents
Inverter control circuit Download PDFInfo
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- CN106253234B CN106253234B CN201610406003.4A CN201610406003A CN106253234B CN 106253234 B CN106253234 B CN 106253234B CN 201610406003 A CN201610406003 A CN 201610406003A CN 106253234 B CN106253234 B CN 106253234B
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- inverter
- control circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
- H02H7/1222—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters responsive to abnormalities in the input circuit, e.g. transients in the DC input
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16504—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the components employed
- G01R19/16523—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the components employed using diodes, e.g. Zener diodes
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
Abstract
The present invention provides a kind of inverter control circuit.In inverter control circuit, the charge of accumulation in the capacitor can suitably be discharged, and can inexpensively constitute abnormal voltage detection unit and inverter stopping/recovery unit.Setting：Abnormal voltage detection and discharge circuit, it is when the DC voltage exported from capacitor is more than the scheduled normal range (NR) i.e. breakdown voltage of Zener diode or less, above-mentioned capacitor (6) is set to discharge while exporting detection signal (VA) corresponding with above-mentioned DC voltage (VC), on the other hand, its in the case where above-mentioned DC voltage is included in above-mentioned normal range (NR), with above-mentioned DC voltage (VC) be more than above-mentioned normal range (NR) the case where compared with impedance get higher；Stopping/recovery control circuit (40), inverter (20) is set as halted state by it according to above-mentioned detection signal (VA), which is converted to alternating voltage (MU, MV, MW) by above-mentioned DC voltage (VC) and is supplied to load (30).
Description
Technical field
The present invention relates to a kind of inverter control circuits.
Background technology
As the background technology of the art, recorded in the abstract of description of following patent documents 1 " inverse having
Become the current detecting configured with phase current more than a phase in the circuit of the air conditioner of the DC voltage detection unit 22 in device portion 19
Unit 6, the voltage-phase arithmetic element 9 based on its input, is built-in with multiple crystal at more than one pair of phase-voltage measurement unit 7
The transistor modular 4 of pipe and diode, the electricity that will be divided by the DC voltage after diode therein progress rectification
Hinder device 15, its DC voltage detection unit 12, the abnormal voltage monitoring unit 13 being connect with DC voltage detection unit 12, crystal
Pipe control unit 11, the arithmetic unit 10 of control method for determining transistor modular 4, the smooth electricity consumption that is connect with direct current splenium
Container 16 and the higher harmonic current restraining device 17 " being made of reactor 3.
In patent document 1, although detect abnormal voltage that abnormal voltage monitoring unit 13 is not especially described in detail
Action, but generally for the damage for preventing inverter 19, consider to stop inverter 19.But if merely stop
Only inverter 19 then will produce problems with, that is, maintain abnormal voltage natural until accumulating the charge in smoothing capacity device 16
Until electric discharge, and the operation of inverter 19 can not restart.It will accumulation it is therefore also considered that being arranged when detecting abnormal voltage
The discharge circuit that charge in smoothing capacity device 16 discharges, but in addition setting discharge circuit can increase cost.
Patent document 1：Japanese Unexamined Patent Publication 10-14253 bulletins
Invention content
The invention is made in view of the above circumstances, its purpose is that provide a kind of inverter control circuit, can
While suitably accumulation charge in the capacitor is discharged, can inexpensively constitute abnormal voltage detection unit and
Inverter stopping/recovery unit.
To solve the above-mentioned problems, inverter control circuit of the invention has：Abnormal voltage detection and discharge circuit,
In the case where the DC voltage exported from capacitor is more than scheduled normal range (NR), export on one side corresponding with above-mentioned DC voltage
Detection signal make above-mentioned capacitor discharge on one side, on the other hand, the case where above-mentioned normal range (NR) includes above-mentioned DC voltage
Under, with above-mentioned DC voltage be more than above-mentioned normal range (NR) the case where compared with impedance get higher；And
Inverter is set as halted state by stopping/recovery control circuit according to above-mentioned detection signal, which will be upper
DC voltage is stated to be converted to alternating voltage and be supplied to load.
Inverter control circuit according to the present invention can suitably discharge the charge of accumulation in the capacitor, and
Abnormal voltage detection unit and inverter stopping/recovery unit can inexpensively be constituted.
Description of the drawings
Fig. 1 is the block diagram of the motor drive of first embodiment of the invention.
Fig. 2 (a) is the oscillogram of the alternating voltage VS in the motor drive of first embodiment；Fig. 2 (b) is it
The oscillogram of DC voltage VC；Fig. 2 (c) is the state diagram of its transistor；Fig. 2 (d) is the oscillogram of control instruction voltage VSP.
Fig. 3 is the figure for indicating the relationship between DC voltage VC and control instruction voltage VSP.
Fig. 4 is the block diagram of the motor drive of second embodiment of the invention.
Fig. 5 is the block diagram of the motor drive of third embodiment of the invention.
Fig. 6 is the block diagram of the motor drive of four embodiment of the invention.
Fig. 7 is the block diagram of the motor drive of fifth embodiment of the invention.
Fig. 8 is the block diagram of the motor drive of sixth embodiment of the invention.
Fig. 9 is the block diagram of the motor drive of the variation of first embodiment.
Symbol description
2：Source power supply, 4：Converter, 6：Capacitor, the detection of 10 abnormal voltages and discharge circuit, 12：Zener diode,
14,16,18：Resistor, 19：Relay coil, 20：Inverter, 30：Motor (load), 40,50,60,70,80,90：Stop
Only/restore control circuit, 41,43：Resistor, 42,52,84：Transistor, 44,46：Resistor, 48：Capacitor, 51：Capacitance
Device, 61,72,74：Electric wire, 82：Relay, 82a：Relay tip (cutting portion), 82b：Relay coil, 92：Relay connects
Point (cutting portion), A, D：Tie point, SD, NSD：Control signal, VA：Detect signal voltage, VB：Breakdown voltage, VC：Direct current
Pressure, VCC：Control power supply voltage, VD：Consume current versus voltage, VS：Alternating voltage.
Specific implementation mode
[first embodiment]
<The structure of embodiment>
(overall structure)
First, referring to Fig.1 shown in block diagram illustrate first embodiment of the invention motor drive structure.
In Fig. 1, the alternating voltage VS provided from source power supply 2 is converted to DC voltage VC by converter 4.Converter 4 exists
In the case that source power supply 2 is single-phase, such as it can be constituted by bridging the full-wave rectifying circuit of 4 diodes.Capacitor 6
It is attached between the output voltage terminals and earthing potential (hereinafter referred to as " GND current potentials ") of converter 4, passes through DC voltage
VC carrys out stored charge.In addition, the structure of converter 4 is not limited to the above situation, it will not be from capacitor 6 but be preferably constructed to electric current
Adverse current arrives converter 4.When converter 4 is made up of full-wave rectifying circuit, at steady state, DC voltage VC become with
The wave height value of alternating voltage VS is almost equal.For example, when alternating voltage VS is 220 [V]) in the case of (virtual value), direct current
Pressure VC beLeft and right.
Abnormal voltage detection and discharge circuit 10 are connected in parallel with capacitor 6, have the exception of detection DC voltage VC, and
And the function that charge of the accumulation in capacitor 6 discharges.Stopping/recovery control circuit 40 is with the following functions, that is, exists
In the case that abnormal voltage detection and discharge circuit 10 detect the exception of DC voltage VC, stop the action of inverter 20.It is inverse
Become device 20 in the case where not acted by stopping/40 stopping of recovery control circuit, DC voltage VC is converted into three-phase alternating current
Voltage MU, MV, MW are simultaneously supplied to motor 30, to drive motor 30.Abnormal voltage is detected into simultaneous discharge circuit 10 and is stopped
Only/restore control circuit 40 collectively referred to as " inverter control circuit ".In addition, in this embodiment party, motor 30 imagines driving
The three-phase synchronous motor of the indoor unit of air conditioner or the fan of outdoor unit, but the type and purposes of motor 30 are not limited to
This.
(abnormal voltage detection and discharge circuit 10)
Abnormal voltage detection and discharge circuit 10 are to be connected in series with Zener diode 12, resistor 14,16, and by resistor
16 circuits being connect with GND current potentials.The breakdown voltage VB of Zener diode 12 is set to the electricity of the standard than DC voltage VC
The voltage for pressing mobility scale more taller.For example, the nominal voltage of alternating voltage VS is 220 [V], if normal range (NR) is (i.e.
The regulation of line voltage of standard) be ± 20%, then the ceiling voltage of the standard of alternating voltage VS is 264 [V].At this point, direct current
Pressure VC be Left and right, thus as Zener diode 12 consider deviation and select breakdown voltage VB for
The left and right 440 [V].
If alternating voltage VS in normal range (NR), DC voltage VC also be normal range (NR) in (breakdown voltage VB with
Under), for electric current almost without flow through Zener diode 12, abnormal voltage detection and discharge circuit 10 become high resistant relative to capacitor 6
Anti- state.It is almost 0 [V] that the voltage of the tie point A of resistor 14,16, which detects signal voltage VA, as a result,.On the other hand, when
Alternating voltage VS is more than normal range (NR) and rises, and when being more than breakdown voltage VB to DC voltage VC, electric current flows through abnormal voltage
Detection and discharge circuit 10.The electric current and " VC-VB " are proportional, so DC voltage VC is higher, the electric current is bigger, detect signal
Voltage VA is got higher with being also proportional to.
(inverter 20)
As described above, DC voltage VC is converted to three-phase alternating voltage MU, MV, MW by inverter 20, this is by not scheming
DC voltage VC is carried out PWM modulation and realized by the multiple switch element shown.Therefore, it is supplied to inverter 20 from converter 4
Electric current inverter 20 is returned after flowing through motor 30, flow to GND current potentials via GH terminals.In addition, sometimes also can be at the ends GH
The resistance etc. of overcurrent protection is installed between son and GND current potentials.In addition, for the above-mentioned switch element of on off control,
The control power supply voltage VCC of about 15 [V] is inputted to inverter 20.
In addition, to the VSP terminal input control command voltages VSP of inverter 20.Control instruction voltage VSP is, for example, 0~6
The voltage of the left and right [V], inverter 20 control three-phase alternating voltage MU, MV, MW according to voltage level.For example, may be controlled to
The voltage level the high, and the frequency of three-phase alternating voltage MU, MV, MW become higher, the more low then three-phase alternating voltage of voltage level
The frequency of MU, MV, MW become lower.But if the scheduled cut-out voltage Voff of control instruction voltage VSP deficiencies (such as 1.8
The left and right [V]), then inverter 20 becomes halted state, stops the output of three-phase alternating voltage MU, MV, MW.In addition, control instruction
Voltage VSP is the instruction electricity of the three-phase alternating voltage output of the control inverter 20 such as speed command, duty ratio instruction, torque instruction
Pressure.
(stopping/recovery control circuit 40)
In the inside of stopping/recovery control circuit 40, to the base terminal input detection signal voltage VA of transistor 42, hair
Emitter terminal is connect with GND current potentials.If detect signal voltage VA become between the base/emitter of transistor 42 saturation voltage with
On, then transistor 42 is on-state.In addition, being provided from epigyny device (not shown) stopping/recovery control circuit 40 original
Control instruction voltage VSP0.Resistor 46, capacitor 48 constitute low-pass filter, remove and are wrapped in original control instruction voltage VSP0
The radio-frequency component included.Even if mitigating control if this is in order in the case of original control instruction voltage VSP0 change dramaticallies to refer to
Enable the variation of voltage VSP.In addition, in order to limit the electric current for flowing to transistor 42, in the collector of resistor 46 and transistor 42
Resistor 44 is connected between terminal.In addition, resistor 44 is not essential.
If transistor 42 is off-state, the electric current I tr substantially 0 [A] of resistor 44 are flowed through, so eliminating
The original control instruction voltage VSP0 of radio-frequency component is supplied to inverter 20 as control instruction voltage VSP.On the other hand, when
Transistor 42 is on-state, will by resistor 46, resistor 44 and transistor 42 when electric current I tr flow through transistor 42
Eliminate radio-frequency component original control instruction voltage VSP0 divided after voltage by as control instruction voltage VSP provide
To inverter 20.
<The action of embodiment>
Then, illustrate the action example of present embodiment.Fig. 2 (a)~(d) indicates to generate each portion before and after abnormal voltage
The example of waveform etc., Fig. 2 (a) are the oscillograms of the amplitude of alternating voltage VS, and Fig. 2 (b) is the oscillogram of DC voltage VC, figure
2 (c) is the state diagram of transistor 42, and Fig. 2 (d) is the oscillogram of control instruction voltage VSP.At the time of alternating voltage VS before t1
Value be VS1, rise to VS2 stepwise in moment t1, between moment t1~t6 during be saved in VS2, at the moment
T6 is restored to VS1 stepwise again.In the example in the figures, it is assumed that VS1 is the voltage in the regulation of line voltage of standard,
VS2 is its 2 times or so voltage.
Before moment t1, in the case where converter 4 is full-wave rectifying circuit, DC voltage VC is substantially equal to exchange
The wave height value of voltage VS1Value (VC1).If also, rise stepwise in moment t1 voltage VS1,
After time tl, DC voltage VC increases at leisure.Reach VC2 in moment t2, DC voltage VC.Voltage VC2 is and Zener
Value equal the breakdown voltage VB of diode 12.Therefore, in moment t2, electric current begin to flow through Zener diode 12, resistor 14,
16.It is about 0 [V] that signal voltage VA was detected before moment t2, but after moment t2, detection signal voltage VA and " VC-
VB " proportionally rises.
Later, reach VC3 in moment t3, DC voltage VC.Voltage VC3 is that the detection signal voltage VA of tie point A reaches
To the voltage of saturation voltage between the base/emitter of transistor 42.Therefore, as shown in Fig. 2 (c), moment t3 transistor 42 at
For on-state.Later, reach VC4 in moment t4, DC voltage VC.Voltage VC4, which is control instruction voltage VSP, becomes cut-out
The voltage of voltage Voff.Inverter 20 becomes halted state as a result, stops the output of three-phase alternating voltage MU, MV, MW.Later,
Become VC5 in moment t5, DC voltage VC.Voltage VC5 converter 4 be full-wave rectifying circuit in the case of, be and the time
The roughly equal value of wave height value of alternating voltage VS, that is, voltage VS2 of point.
Here, the relationship between DC voltage VC and control instruction voltage VSP is illustrated with reference to Fig. 3.In the example in the figures,
Assuming that the original control instruction voltage VSP0 provided from epigyny device (not shown) is fixed value (6 [V]).When DC voltage VC ratios
When voltage VC3 is low, the electric current I tr (referring to Fig.1) substantially 0 [A] of transistor 42 are flowed through, so control instruction voltage VSP and original
Beginning, control instruction voltage VSP0 was roughly equal.But if DC voltage VC more than voltage VC3, electric current I tr and " VC-
VB " is proportional, therefore the voltage drop that control instruction voltage VSP is generated than original control instruction voltage VSP0 in low resistance device 46
Amount.
But when DC voltage VC is near voltage VC3, the connection resistance of transistor 42 is big, therefore electric current I tr become
Must be smaller, control instruction voltage VSP becomes the value close to original control instruction voltage VSP0.If DC voltage VC becomes electricity
Near the median for pressing VC3, VC4, then the connection resistance of transistor 42 becomes smaller, and can flow through bigger electric current I tr, and control refers to
Voltage VSP is enabled to become larger relative to the slope of DC voltage VC.Also, as described above, if DC voltage VC becomes VC4 or more,
Then control instruction voltage VSP becomes cutting off voltage Voff hereinafter, therefore inverter 20 stops three-phase alternating voltage MU, MV, MW
Output.
Fig. 2 is returned to, if being again restored to VS1 in moment t6 alternating voltage VS, the charge of capacitor 6 is via abnormal electric
Pressure detection and discharge circuit 10 start to discharge (referring to Fig.1).T7 at the time of later, if control instruction voltage VSP is more than to cut
Power-off pressure Voff, then inverter 20 is as action state.That is, it is corresponding with control instruction voltage VSP on one side, restart three on one side
The output of phase alternating voltage MU, MV, MW.For example, restarting three-phase alternating current with corresponding with control instruction voltage VSP frequency
The output of voltage MU, MV, MW.T8 at the time of later, if DC voltage VC is less than VC3, transistor 42 becomes cut-out shape
State, control instruction voltage VSP become equal with original control instruction voltage VSP0.The action of motor drive is extensive as a result,
It is stable state again, motor 30 is driven to rotate with speed corresponding with original control instruction voltage VSP0.
T9 at the time of later, if DC voltage VC is less than VC2 (the breakdown voltage VB of Zener diode 12), electric current
Almost simultaneous discharge circuit 10 is detected without flow through abnormal voltage.Therefore, after moment t9, by each in motor drive
The natural electric discharge in portion and the power consumption with motor drive, DC voltage VC is slowly close to VC1.Here, make voltage VC4
Higher than voltage VC2 (breakdown voltage VB) is also one of the feature of present embodiment.According to this feature, by accelerating VC4's or more
The electric discharge of voltage becomes scheduled cut-out voltage Voff to shorten the time of overvoltage condition in control instruction voltage VSP
After above, abnormal voltage detection and discharge circuit 10 also can continue to discharge.
As described above, according to the present embodiment, if alternating voltage VS rises more than normal range (NR), and from capacitor
The DC voltage VC of 6 outputs rises also above normal range (NR), then abnormal voltage detection and the output of discharge circuit 10 and direct current
The corresponding detection signal voltage VA of source VC, thus can by the detection signal voltage VA by transistor 42 be set as on-state come
Stop inverter 20.Also, if alternating voltage VS returns to normal range (NR), abnormal voltage detection and discharge circuit 10 will tire out
Charge of the product in capacitor 6 promptly discharges, so DC voltage VC can be made promptly to be restored to normal range (NR).
Further, when DC voltage VC is in normal range (NR), electric current almost detects without flow through abnormal voltage and discharges electricity
Road 10, so the consumption electric power in abnormal voltage detection and discharge circuit 10 can be inhibited.Also, abnormal voltage detection and electric discharge
Circuit 10 has the function of " detection of abnormal voltage " and " electric discharge " concurrently, thus with the feelings that are independently arranged the circuit functioned respectively
Condition is compared, and the components number in motor drive can be cut down.
[second embodiment]
Then, the structure of the motor drive of second embodiment of the invention is illustrated with reference to block diagram shown in Fig. 4.
In the present embodiment, the inverter 20 of first embodiment is replaced using inverter 130 shown in Fig. 4.It is right
The inverter 130 inputs binary signal and controls signal SD.If controlling signal SD becomes H (height) level (more than predetermined threshold
Voltage), then inverter 130 become action state, three-phase alternating voltage MU, MV, MW are exported to motor 30.Another party
Face, if control signal SD becomes L (low) level (voltage for being less than above-mentioned threshold value), inverter 130 becomes halted state, stops
The only output of three-phase alternating voltage MU, MV, MW.In addition, the inverter 130 of present embodiment also with the inversion of first embodiment
Device 20 similarly sets three-phase alternating voltage MU, MV, MW according to control instruction voltage VSP.But in the present embodiment,
Not according to DC voltage VC operation and control command voltage VSP, therefore omit the diagram of relevant circuit.
In addition, in the present embodiment, the first embodiment party is replaced using stopping shown in Fig. 4/recovery control circuit 50
The stopping of formula/recovery control circuit 40.Inspection is inputted to the base terminal of transistor 52 in the inside of stopping/recovery control circuit 50
Signal voltage VA is surveyed, emitter terminal is connect with GND current potentials.In addition, collector terminal is connect with one end of resistor 51, in electricity
The other end for hindering device 51 applies control power supply voltage VCC.Also, the voltage of the collector terminal of transistor 52 is by as control
Signal SD is supplied to inverter 130.In addition, structure (the figure of the structure and first embodiment other than the above of present embodiment
1) identical.
In said structure, when DC voltage VC is in normal range (NR), electric current almost detects without flow through abnormal voltage simultaneous
Discharge circuit 10, so detection signal voltage VA is almost 0 [V].Therefore, transistor 52 becomes dissengaged positions, control signal SD
It is pulled up by resistor 51, becomes H level.In this way, inverter 130 become action state, by three-phase alternating voltage MU,
MV, MW are exported to motor 30.
On the other hand, it if DC voltage VC becomes the breakdown voltage VB or more of Zener diode 12, flows through abnormal electric
The electric current of pressure detection and discharge circuit 10 is proportional to " VC-VB ".If DC voltage VC is further got higher, signal voltage is detected
VA is as more than saturation voltage, then transistor 52 is turned between the base/emitter of transistor 52.In this way, control letter
Number SD becomes value, the i.e. L level close to 0 [V], so inverter 130 becomes halted state, stopping three-phase alternating voltage MU, MV,
The output of MW.
As described above, it is identical with first embodiment according to the present embodiment, inversion can be switched according to DC voltage VC
Action state/halted state of device 130 reaches effect same with first embodiment.
[third embodiment]
Then, block diagram referring to Figure 5 illustrates the knot of the motor drive of third embodiment of the present invention
Structure.
The control signal NSD of negative logic is inputted to the inverter 140 of present embodiment to replace in second embodiment
Control signal SD.That is, if control signal NSD becomes L level (voltage for being less than scheduled threshold value), inverter 140 becomes
Action state exports three-phase alternating voltage MU, MV, MW to motor 30.On the other hand, if control signal NSD becomes H electricity
Flat (voltage more than above-mentioned threshold value), then for inverter 140 as halted state, stopping three-phase alternating voltage MU, MV, MW's is defeated
Go out.In addition, in the present embodiment, stopping for second embodiment is replaced using stopping shown in fig. 5/recovery control circuit 60
Only/restore control circuit 50.Stopping/recovery control circuit 60 is made of an electric wire 61, which will be from abnormal voltage
The detection signal voltage VA that detection and discharge circuit 10 export is supplied to inverter 140 as control signal NSD.Present embodiment
Structure and second embodiment other than the above structure (Fig. 4) it is identical.
In said structure, when DC voltage VC is in normal range (NR), electric current almost detects without flow through abnormal voltage simultaneous
Discharge circuit 10, so detection signal voltage VA substantially 0 [V].Therefore, control signal NSD becomes L level, therefore inverter
140 become action state, and three-phase alternating voltage MU, MV, MW are exported to motor 30.On the other hand, if DC voltage VC
As the breakdown voltage VB or more of Zener diode 12, then the electric current and " VC- of abnormal voltage detection and discharge circuit 10 are flowed through
VB " is proportional.If DC voltage VC is further got higher, detection signal voltage VA becomes above-mentioned threshold value or more, then controls signal
NSD becomes H level, so inverter 140 becomes halted state, stops the output of three-phase alternating voltage MU, MV, MW.
As described above, according to the present embodiment, it is identical as the first, second embodiment, it can be cut according to DC voltage VC
Action state/the halted state for changing inverter 140 reaches effect identical with the first, second embodiment.In turn, this implementation
The stopping of mode/recovery control circuit 60 is compared with the stopping of the first, second embodiment/recovery control circuit 40,50, structure
It simply, being capable of cost of implementation decline.
[the 4th embodiment]
Then, with reference to block diagram shown in fig. 6, illustrate the structure of the motor drive of four embodiment of the invention.
In the present embodiment, the inverter 20 of first embodiment is replaced using with the inverter 150 of RS terminals
(Fig. 1).In addition, describing the function of RS terminals below.
In addition, abnormal voltage in the present embodiment detects in simultaneous discharge circuit 110, it is being sequentially connected in series Zener two
After pole pipe 12 and 3 resistors 14,16,18, it is connect with GND current potentials.In addition, resistor 18 is low-resistance shunt resistance
Device.The tie point D of resistor 16,18 is connect via electric wire 74 with the GH terminals of inverter 150.In addition, the company of resistor 14,16
The detection signal voltage VA of contact A is connect via electric wire 72 with the RS terminals of inverter 150.These electric wires 72,74 are included in
In stopping/recovery control circuit 70 in present embodiment.
Here, the function (Fig. 1) of the function and first embodiment of the GH terminals of inverter 150 is identical, is for that will flow
The electric current for crossing motor 30 flows to the terminal of GND current potentials.As in the present embodiment, if between GH terminals and GND current potentials
Resistor 18 is connected, then the voltage VD of GH terminals proportionally rises with the electric current for flowing through resistor 18, so if measuring electricity
VD is pressed, then is capable of detecting when whether flow through overcurrent in inverter 150.Therefore, voltage VD is known as " consumption electric current correspondence electricity
Pressure ".
In common application method, RS terminals are connect with GH terminals, according to consumption current versus voltage VD whether be more than
Scheduled threshold value VDth comes whether detection of excessive current has flowed through inverter 150.But in the present embodiment, such as Fig. 6 institutes
Show, RS terminals are connect with tie point A.Therefore, illustrate the meaning.If DC voltage VC is less than the breakdown potential of Zener diode 12
Press VB, then electric current is almost without flow through resistor 14,16, so, detection signal voltage VA becomes and consumption current versus voltage VD
It is equal.
Therefore, with common application method the case where, is identical, and inverter 150 is according to detection signal voltage VA and threshold value VDth
Between comparison result, be capable of detecting when whether generate overcurrent in inverter 150.On the other hand, if DC voltage VC at
For the breakdown voltage VB or more of Zener diode 12, then the electric current proportional to " VC-VB " is flowed through in resistor 16, so, inspection
Survey the amount that signal voltage VA specific consumption current versus voltages VD is higher by the voltage drop in resistor 16.Present embodiment it is above-mentioned with
The structure (Fig. 1) of outer structure and first embodiment is identical.
In said structure, when DC voltage VC is in normal range (NR), detection signal voltage VA become substantially with consumption
Current versus voltage VD is equal.Therefore, as long as overcurrent does not flow through inverter 150, inverter 150 becomes action state,
Three-phase alternating voltage MU, MV, MW are exported to motor 30.On the other hand, if DC voltage VC becomes Zener diode 12
Breakdown voltage VB or more, then electric current flow through abnormal voltage detection and discharge circuit 110, detection signal voltage VA become specific consumption
Current versus voltage VD wants high.If DC voltage VC is further got higher, detection signal voltage VA is more than threshold value VDth, then inversion
Device 150 becomes halted state, stops the output of three-phase alternating voltage MU, MV, MW.
As described above, according to the present embodiment, it is identical as first~third embodiment, it can be cut according to DC voltage VC
Action state/the halted state for changing inverter 150 reaches effect identical with first~third embodiment.In turn, in this reality
It applies in mode, switches action state/halted state of inverter 150 using the RS terminals of overcurrent detection, therefore can
" overcurrent in inverter 150 " and " exception of DC voltage VC " are detected via public terminal (RS terminals), so, with
The case where detecting both sides respectively is compared, and can simplify circuit structure, and being capable of cost of implementation reduction.
[the 5th embodiment]
Then, with reference to block diagram shown in Fig. 7, illustrate the knot of the motor drive of the 5th embodiment of the present invention
Structure.
In the present embodiment, stopping for first embodiment is replaced using stopping shown in Fig. 7/recovery control circuit 80
Only/restore control circuit 40 (referring to Fig.1).It is defeated to the base terminal of transistor 84 in the inside of stopping/recovery control circuit 80
Enter to detect signal voltage VA, emitter terminal is connect with GND current potentials.In addition, the relay line of collector terminal and relay 82
One end connection for enclosing 82b applies control power supply voltage VCC to the other end of relay coil 82b.Also, control power supply
Voltage VCC is provided to the VCC terminal of inverter 20 via the relay tip 82a of relay 82.Here, when flowing through relay
When the electric current of device coil 82b is less than scheduled threshold value, relay tip 82a is turned on, which is the threshold value or more
When, relay tip 82a becomes dissengaged positions.The structure of the structure and first embodiment other than the above of present embodiment
(Fig. 1) is identical.
In said structure, when DC voltage VC is in normal range (NR), electric current almost detects without flow through abnormal voltage simultaneous
Discharge circuit 10, so detection signal voltage VA substantially 0 [V].Therefore, transistor 84 becomes dissengaged positions, and electric current is hardly
Relay coil 82b is flowed through, relay coil 82b is turned on.In this way, control power supply voltage VCC is supplied to inverse
Become the VCC terminal of device 20, its internal switch element (not shown) of 20 on off control of inverter, by three-phase alternating voltage
MU, MV, MW are exported to motor 30.
On the other hand, it if DC voltage VC becomes the breakdown voltage VB or more of Zener diode 12, flows through abnormal electric
The electric current of pressure detection and discharge circuit 10 is proportional to " VC-VB ".If DC voltage VC is further got higher, signal voltage is detected
VA is as more than saturation voltage, then transistor 84 is turned between the base/emitter of transistor 84.If above-mentioned threshold value
Above electric current flows through relay coil 82b, then relay tip 82a becomes dissengaged positions.In this way, not providing inverter 20
Control power supply voltage VCC, the output of three-phase alternating voltage MU, MV, MW also stop.
More than, it is identical with the first~the 4th embodiment according to the present embodiment, it can be switched according to DC voltage VC
The on/off state of inverter 20 reaches effect same with the first~the 4th embodiment.
[sixth embodiment]
Then, the knot of the motor drive of the sixth embodiment of the present invention is illustrated with reference to block diagram shown in Fig. 8
Structure.
In the present embodiment, abnormal voltage detection and discharge circuit 120 by Zener diode 12, resistor 14 and after
Electric apparatus coil 19 is connected in series with, and relay coil 19 is connect with GND current potentials.In addition, using stopping shown in Fig. 8/recovery control
Circuit 90 processed replaces stopping/recovery control circuit 80 (with reference to Fig. 7) of the 5th embodiment.Stopping/recovery control circuit 90
With being switched on/the relay tip 92 of dissengaged positions by flowing through the electric current of relay coil 19.To relay tip
92 one end applies control power supply voltage VCC, and the other end connects the VCC terminal of inverter 20.
Relay tip 92 is turned on when the electric current for flowing through relay coil 19 is less than scheduled threshold value, if
The electric current, which is the threshold value or more, then becomes dissengaged positions.As is well known, relay coil 19 flows through then if there is electric current
Magnetic flux is generated, and relay tip 92 is driven by the magnetic flux.Therefore, in the present embodiment, " 19 institute of relay coil
The magnetic flux of generation " is " detection signal ", and stopping/recovery control circuit 90 is by with relay tip 92 according to the detection
Signal controls inverter 20.The structure other than the above of present embodiment and the structure (Fig. 7) of the 5th embodiment are identical.
In said structure, when DC voltage VC is in normal range (NR), electric current is almost put without flow through abnormal voltage detection is simultaneous
Circuit 120, so relay tip 92 is on-state.In this way, providing control power supply electricity to the VCC terminal of inverter 20
Press VCC, its internal switch element (not shown) of 20 on off control of inverter, and by three-phase alternating voltage MU, MV, MW
It exports to motor 30.
On the other hand, if DC voltage VC becomes the breakdown voltage VB or more of Zener diode 12, electric current flows through different
Normal voltage detecting and discharge circuit 120.If DC voltage VC is further got higher, flowing through the electric current of relay coil 19 becomes above-mentioned
More than threshold value, then relay tip 92 becomes dissengaged positions.In this way, do not provide control power supply voltage VCC to inverter 20, three
The output of phase alternating voltage MU, MV, MW also stop.
As described above, identical with the first~the 5th embodiment according to the present embodiment, can according to DC voltage VC come
The on/off state for switching inverter 20, reaches effect same with the first~the 5th embodiment.
[variation]
The present invention is not limited to above-mentioned embodiments, can there is various modifications.For easy understanding the above embodiment is
Ground illustrates the present invention and the illustration of progress, is not necessarily limited to the structured mode of institute for having illustrated.In addition, can be by some
A part for the structure of embodiment is replaced into the structure of other embodiment, in addition, also can be to the knot of some embodiment
Structure increases the structure of other embodiment.In addition, deletion or other knots can be carried out to a part for the structure of each embodiment
Addition/displacement of structure.Such as can be following deformation to the deformation that the above embodiment carries out.
(1) in the first, second, the 5th embodiment (Fig. 1, Fig. 4, Fig. 7), can add makes used transistor
42, the resistor of 52,84 motion stability.Fig. 9 indicates to have added first embodiment (Fig. 1) the one of the structure of resistor
Example.The structure of Fig. 9 and the structure of Fig. 1 are almost same, still, replace stopping/recovery control circuit 40 and be arranged stopping/it is extensive
In multiple control circuit 40A, the tie point A in simultaneous discharge circuit 10 is detected in abnormal voltage and between the base terminal of transistor 42
It is inserted into resistor 41, resistor 43 is connected between the base terminal and emitter terminal of transistor 42.In addition, including crystal
Pipe 42 and resistor 41,43 and also circulating as " transistor " in an enclosed encapsulation, so can also apply this
Transistor.
(2) in the abnormal voltage of first embodiment (Fig. 1) detects simultaneous discharge circuit 10, it is connected in series with two pole of Zener
12, two resistors 14,16 of pipe, but it can also be connected in series with Zener diode 12 and a resistor, by their connection
The voltage of point is exported as detection signal voltage VA.
[summary of structure/effect]
As described above, first~sixth embodiment, has：Abnormal voltage detection and discharge circuit (10,110,120),
It is defeated on one side when the DC voltage (VC) exported from capacitor (6) is more than scheduled normal range (NR) (breakdown voltage VB or less)
Go out detection signal (VA) corresponding with above-mentioned DC voltage (VC) makes above-mentioned capacitor (6) discharge on one side, on the other hand, above-mentioned
In the case that normal range (NR) includes above-mentioned DC voltage (VC), impedance becomes than above-mentioned DC voltage (VC) to be more than above-mentioned normal
The case where range higher；With stopping/recovery control circuit (40,50,60,70,80,90), new user is detected according to described
(VA), inverter (20,130,140,150) is set as halted state, which is converted to friendship by above-mentioned DC voltage (VC)
Galvanic electricity pressure (MU, MV, MW) is simultaneously supplied to load (30).
Abnormal voltage detection and discharge circuit (10,110,120), when DC voltage (VC) is more than normal range (NR), simultaneously
The function of playing the function of output detection signal (VA) and above-mentioned capacitor (6) is made to discharge, so can be suitably by accumulation
It also can inexpensively be constituted while charge in capacitor (6) is discharged.
Further, in first~sixth embodiment, above-mentioned abnormal voltage detection and discharge circuit (10,110,120)
The one or more resistors (14,16,18) being connected in series with Zener diode (12), with above-mentioned Zener diode (12),
To flow through above-mentioned Zener diode (12) the bigger signal level of electric current it is bigger signal it is defeated as above-mentioned detection signal (VA)
Go out.
The bigger signal of the bigger signal level of electric current for flowing through Zener diode (12) is set as detection signal (VA), thus
The circuit structure of abnormal voltage detection and discharge circuit (10,110,120) can be simplified.
Further, in first~sixth embodiment, above-mentioned stopping/recovery control circuit (40,50,60,70,80,
90) it is the predetermined voltage higher than the breakdown voltage of above-mentioned Zener diode (12) (VB=VC2) by above-mentioned DC voltage (VC)
(VC4) above-mentioned inverter (20,130,140,150) is set as halted state by the situation more than as condition.
In such manner, it is possible to accelerate the electric discharge of capacitor (6) of the DC voltage (VC) to be more than predetermined voltage (VC4) when, it can
Shorten the time of overvoltage condition.
Further, in first~sixth embodiment, if abnormal above-mentioned DC voltage (VC) becomes above-mentioned normal
Range, then above-mentioned stopping/recovery control circuit (40,50,60,70,80,90) keep above-mentioned inverter (20,130,140,150) extensive
Action state is arrived again.
In this way, if DC voltage (VC) becomes normal range (NR), inverter (20,130,140,150) can be made to restore
To action state.
Further, in the first embodiment, above-mentioned inverter (20) according to the control instruction voltage (VSP) being provided come
Above-mentioned alternating voltage (MU, MV, MW) is controlled, and if above-mentioned control instruction voltage (VSP) is more than scheduled cut-out voltage
(Voff), then become action state, if above-mentioned control instruction voltage (VSP) become above-mentioned cut-out voltage (Voff) hereinafter, if
Become halted state, above-mentioned stopping/recovery control circuit (40) is according to above-mentioned detection signal (VA), by above-mentioned control instruction voltage
(VSP) it is set as above-mentioned cut-out voltage (Voff) below.
In such manner, it is possible to carry out control corresponding with abnormal voltage using control instruction voltage (VSP).
Further, in second, third embodiment, the control for the two-value that above-mentioned inverter (130,140) basis is provided
Signal (SD, NSD) processed comes set action state and halted state, and above-mentioned stopping/recovery control circuit (50,60) is according to above-mentioned
The value of above-mentioned control signal (SD, SND) is set as value corresponding with above-mentioned halted state by detection signal (VA).
In such manner, it is possible to carry out control corresponding with abnormal voltage using the control signal (SD, SND) of two-value.
Further, in the fourth embodiment, above-mentioned inverter (150) judges the terminal (ends RS according to scheduled overcurrent
Son) voltage level judge whether to produce overcurrent in above-mentioned inverter (150), be judged as producing overcurrent
In the case of become halted state, above-mentioned stopping/recovery control circuit (70) is according to above-mentioned detection signal (VA) come will be above-mentioned excessively electric
The voltage of stream judgement terminal (RS terminals) is set as voltage corresponding with overcurrent.
In such manner, it is possible to carry out control corresponding with abnormal voltage using overcurrent judgement terminal (RS terminals).
Further, in the 5th, sixth embodiment, above-mentioned inverter (20) receives different from above-mentioned DC voltage (VC)
The supply of control power supply voltage (VCC) of voltage acted, above-mentioned stopping/recovery control circuit (80,90) has
Cutting portion (82a, 92), according to above-mentioned detection signal (VA), above-mentioned control power supply of the cutting needle to above-mentioned inverter (20)
The supply of voltage (VCC).
In such manner, it is possible to cut off the supply of control power supply voltage (VCC), control corresponding with abnormal voltage is carried out.
Claims (7)
1. a kind of inverter control circuit, which is characterized in that
Have：
Abnormal voltage detection and discharge circuit, the case where the DC voltage exported from capacitor is more than scheduled normal range (NR)
Under, make above-mentioned capacitor discharge while exporting detection signal corresponding with above-mentioned DC voltage, on the other hand, above-mentioned
In the case that DC voltage is included in above-mentioned normal range (NR), the case where with above-mentioned DC voltage being more than above-mentioned normal range (NR) phase
Specific impedance is got higher；And
Inverter is set as halted state by stopping/recovery control circuit according to above-mentioned detection signal, which will be above-mentioned straight
Galvanic electricity pressure is converted to alternating voltage and is supplied to load,
Above-mentioned inverter controls above-mentioned alternating voltage, and if above-mentioned control instruction according to the control instruction voltage being provided
Voltage is more than scheduled cut-out voltage, then above-mentioned inverter becomes action state, if above-mentioned control instruction voltage becomes above-mentioned
Cut off voltage hereinafter, then above-mentioned inverter become halted state,
Above-mentioned stopping/recovery control circuit is set as above-mentioned cut-out voltage according to above-mentioned detection signal, by above-mentioned control instruction voltage
Below.
2. inverter control circuit according to claim 1, which is characterized in that
Above-mentioned abnormal voltage detects one that simultaneous discharge circuit has Zener diode, is connected in series with above-mentioned Zener diode
Or multiple resistors, using the bigger signal of the bigger signal level of the electric current for flowing through above-mentioned Zener diode as above-mentioned detection signal
And it exports.
3. inverter control circuit according to claim 2, which is characterized in that
Above-mentioned stopping/restoring circuit with above-mentioned DC voltage be the predetermined voltage higher than the breakdown voltage of above-mentioned Zener diode with
It is upper to be used as condition, above-mentioned inverter is set as halted state.
4. inverter control circuit according to claim 3, which is characterized in that
If abnormal above-mentioned DC voltage becomes above-mentioned normal range (NR), above-mentioned stopping/recovery control circuit makes above-mentioned inversion
Device reverts to action state.
5. inverter control circuit according to claim 4, which is characterized in that
Above-mentioned inverter according to the two-value control signal being provided come set action state and halted state,
The value of above-mentioned control signal is set as and above-mentioned stopping by above-mentioned stopping/recovery control circuit according to above-mentioned detection signal
The corresponding value of state.
6. inverter control circuit according to claim 4, which is characterized in that
Above-mentioned inverter judges that the voltage level of terminal judges whether produced in above-mentioned inverter according to scheduled overcurrent
Overcurrent, in the case where being judged as producing overcurrent, above-mentioned inverter becomes halted state,
Above-mentioned stopping/recovery control circuit according to above-mentioned detection signal, by above-mentioned overcurrent judge the voltage of terminal be set as with
The corresponding voltage of overcurrent.
7. inverter control circuit according to claim 4, which is characterized in that
Above-mentioned inverter receives the supply of the control power supply voltage of the voltage different from above-mentioned DC voltage to be acted,
Above-mentioned stopping/recovery control circuit has：Cutting portion, according to above-mentioned detection signal, cutting needle is to above-mentioned inverter
The supply of above-mentioned control power supply voltage.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2015118791A JP6383328B2 (en) | 2015-06-12 | 2015-06-12 | Inverter control circuit |
| JP2015-118791 | 2015-06-12 |
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| US10035422B2 (en) * | 2016-06-14 | 2018-07-31 | Ford Global Technologies, Llc | Self-limiting active discharge circuit for electric vehicle inverter |
| WO2019107052A1 (en) * | 2017-11-30 | 2019-06-06 | 工機ホールディングス株式会社 | Dc power supply device |
| CN108111007B (en) * | 2018-01-31 | 2020-09-08 | 南京南瑞继保电气有限公司 | Power module redundancy energy-taking circuit and control method |
| JP7238606B2 (en) * | 2019-05-31 | 2023-03-14 | 日本電産株式会社 | Power supply, motor and blower |
| CN116317816B (en) * | 2023-03-23 | 2024-01-16 | 蜂巢传动科技邳州有限公司 | Control system, method, equipment and storage medium for internal circuit of motor controller |
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| CN1906835A (en) * | 2004-05-07 | 2007-01-31 | 三垦电气株式会社 | Power factor improving circuit and switching power supply |
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| JPS60152271A (en) * | 1984-01-19 | 1985-08-10 | Matsushita Electric Ind Co Ltd | Inverter device |
| JPH06105456A (en) * | 1992-09-25 | 1994-04-15 | Toshiba Corp | Inverter overvoltage protection device |
| JPH1014253A (en) | 1996-06-25 | 1998-01-16 | Hitachi Ltd | Air-conditioner with inverter |
| JP2011010469A (en) * | 2009-06-26 | 2011-01-13 | Seiko Epson Corp | Power supply device, and method and program for controlling the power supply device |
| JP2013207831A (en) * | 2012-03-27 | 2013-10-07 | Toyota Motor Corp | Electric vehicle |
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Patent Citations (4)
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| CN1906835A (en) * | 2004-05-07 | 2007-01-31 | 三垦电气株式会社 | Power factor improving circuit and switching power supply |
| CN102150338A (en) * | 2008-09-08 | 2011-08-10 | 三菱电机株式会社 | Overcurrent detection circuit, inverter, compressor, air conditioner, and overcurrent detection circuit adjusting method |
| CN102340242A (en) * | 2010-07-20 | 2012-02-01 | 文科泰克控股公司 | DC/DC converter circuit and method for controlling DC/DC converter circuit |
| CN103944366A (en) * | 2013-01-18 | 2014-07-23 | 富士电机株式会社 | Power conversion device |
Also Published As
| Publication number | Publication date |
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| JP6383328B2 (en) | 2018-08-29 |
| JP2017005903A (en) | 2017-01-05 |
| CN106253234A (en) | 2016-12-21 |
| KR20160146538A (en) | 2016-12-21 |
| KR101948976B1 (en) | 2019-02-15 |
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