CN106253234A - Inverter control circuit - Google Patents
Inverter control circuit Download PDFInfo
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- CN106253234A CN106253234A CN201610406003.4A CN201610406003A CN106253234A CN 106253234 A CN106253234 A CN 106253234A CN 201610406003 A CN201610406003 A CN 201610406003A CN 106253234 A CN106253234 A CN 106253234A
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- voltage
- mentioned
- inverter
- control circuit
- stopping
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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
- 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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- 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
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inverter Devices (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The present invention provides a kind of inverter control circuit.In inverter control circuit, it is possible to the electric charge accumulated in the capacitor is suitably discharged, and abnormal voltage detection unit and inverter stopping/recovery unit can be constituted at a low price.Arrange: the double discharge circuit of abnormal voltage detection, it is when the DC voltage exported from capacitor exceedes below the predetermined normal range i.e. breakdown voltage of Zener diode, export the detection signal (VA) corresponding with above-mentioned DC voltage (VC) while making above-mentioned capacitor (6) discharge, on the other hand, it is in the case of above-mentioned DC voltage is included in above-mentioned normal range, exceedes the situation phase specific impedance of above-mentioned normal range with above-mentioned DC voltage (VC) and uprises；Stop/recover control circuit (40), inverter (20) is set to halted state according to above-mentioned detection signal (VA) by it, and above-mentioned DC voltage (VC) is converted to alternating voltage (MU, MV, MW) and is supplied to load (30) by this inverter.
Description
Technical field
The present invention relates to a kind of inverter control circuit.
Background technology
As the background technology of the art, having described in the specification digest of following patent documentation 1
" be configured with in the circuit possess the air conditioner of DC voltage detector unit 22 of inverter 19 one with
On the current detecting unit 6 of phase current, more than one pair of phase-voltage measurement unit 7, input based on it
Voltage-phase arithmetic element 9, it is built-in with the transistor modular 4 of multiple transistor and diode, will pass through
Diode therein carries out the DC voltage after rectification and carries out the resistor 15 of dividing potential drop, the detection of its DC voltage
Abnormal voltage monitor unit 13 that unit 12 is connected with DC voltage detector unit 12, transistor controls list
Unit 11, determine that what the arithmetic unit 10 of control method of transistor modular 4 was connected with unidirectional current splenium puts down
Sliding electricity container 16 and the higher harmonic current restraining device 17 being made up of reactor 3 ".
In patent documentation 1, although describe abnormal voltage monitor unit 13 the most especially in detail and detect different
Often action during voltage, but generally for preventing the damage of inverter 19, it is considered to stop inverter
19.But, if merely stopping inverter 19, problems with can be produced, i.e. maintains abnormal voltage
Until the electric charge that accumulation is in smoothing capacity device 16 discharges naturally, and the operation of inverter 19 can not
Enough restart.To accumulate in smoothing capacity device 16 it is therefore also considered that be arranged on when detecting abnormal voltage
Electric charge carries out the discharge circuit discharged, but additionally arranges discharge circuit and can increase cost.
Patent documentation 1: Japanese Unexamined Patent Publication 10-14253 publication
Summary of the invention
This invention is made in view of the above circumstances, and its purpose is a kind of inverter control circuit of offer, its
While can suitably the electric charge accumulated in the capacitor being discharged, it is possible to constitute exception at a low price
Voltage detection unit and inverter stopping/recovery unit.
In order to solve the problems referred to above, the inverter control circuit of the present invention possesses: abnormal voltage detection is held concurrently and discharged
Circuit, it is in the case of the DC voltage exported from capacitor exceedes predetermined normal range, output
The detection signal corresponding with above-mentioned DC voltage is while making above-mentioned capacitor discharge, on the other hand, above-mentioned just
In the case of often scope includes above-mentioned DC voltage, with the situation that above-mentioned DC voltage exceedes above-mentioned normal range
Phase specific impedance uprises；And
Stopping/recover control circuit, inverter is set to halted state according to above-mentioned detection signal by it, and this is inverse
Become device above-mentioned DC voltage is converted to alternating voltage and is supplied to load.
Inverter control circuit according to the present invention, it is possible to the electric charge accumulated in the capacitor is suitably put
Electricity, and abnormal voltage detection unit and inverter stopping/recovery unit can be constituted at a low price.
Accompanying drawing explanation
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 the first embodiment；
Fig. 2 (b) is the oscillogram of its 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 representing the relation 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 the first embodiment.
Symbol description
2: source power supply, 4: changer, 6: capacitor, 10 abnormal voltages detections hold concurrently discharge circuits, 12:
Zener diode, 14,16,18: resistor, 19: relay coil, 20: inverter, 30: electronic
Machine (load), 40,50,60,70,80,90: stop/recover control circuit, 41,43: resistor,
42,52,84: transistor, 44,46: resistor, 48: capacitor, 51: capacitor, 61,72,
74: electric wire, 82: relay, 82a: relay tip (cutting portion), 82b: relay coil, 92:
Relay tip (cutting portion), A, D: junction point, SD, NSD: control signal, VA: detection letter
Number voltage, VB: breakdown voltage, VC: DC voltage, VCC: control power supply voltage, VD: disappear
Consumption current versus voltage, VS: alternating voltage.
Detailed description of the invention
[the first embodiment]
<structure of embodiment>
(overall structure)
First, the motor drive of first embodiment of the invention is described with reference to the block diagram shown in Fig. 1
Structure.
In Fig. 1, the alternating voltage VS provided from source power supply 2 is converted to DC voltage by changer 4
VC.Changer 4, such as can be by 4 diodes of bridge joint in the case of source power supply 2 is single-phase
Full-wave rectifying circuit constitute.Capacitor 6 the output voltage terminals of changer 4 and earthing potential (with
It is attached between the most referred to as " GND current potential "), carrys out stored charge by DC voltage VC.It addition,
The structure of changer 4 is not limited to above-mentioned situation, but be preferably constructed to electric current will not from capacitor 6 adverse current to
Changer 4.When changer 4 is consisted of full-wave rectifying circuit, at steady state, DC voltage
VC becomes almost equal with the wave height value of alternating voltage VS.Such as, it is 220 [V] as alternating voltage VS)
In the case of (virtual value), DC voltage VC isLeft and right.
The double discharge circuit 10 of abnormal voltage detection is connected in parallel with capacitor 6, has detection DC voltage VC
Exception, and accumulation electric charge in capacitor 6 is carried out the function discharged.Stop/recover controlling electricity
Road 40 has following functions, i.e. detects DC voltage VC's at the double discharge circuit 10 of abnormal voltage detection
In the case of exception, stop the action of inverter 20.Inverter 20 is not by stopping/recover control electricity
In the case of road 40 stops action, DC voltage VC is converted to three-phase alternating voltage MU, MV,
MW is also supplied to motor 30, thus drives motor 30.By double for abnormal voltage detection discharge circuit 10
It is generically and collectively referred to as " inverter control circuit " with stopping/recover control circuit 40.It addition, in when this embodiment party,
Motor 30 imagination drives the indoor set of air conditioner or the three-phase synchronous motor of the fan of off-premises station, but
Kind and the purposes of motor 30 are not limited to this.
(the double discharge circuit 10 of abnormal voltage detection)
The double discharge circuit 10 of abnormal voltage detection is to be connected in series Zener diode 12, resistor 14,16,
And the circuit that resistor 16 is connected with GND current potential.Breakdown voltage VB of Zener diode 12 is set
It is set to the voltage that the regulation of line voltage of standard than DC voltage VC is more taller.Such as, alternating current
The nominal voltage of pressure VS is 220 [V], if normal range, (i.e. the regulation of line voltage of standard) was ± 20%,
Then the ceiling voltage of the standard of alternating voltage VS is 264 [V].Now, DC voltage VC is Left and right, so considering deviation as Zener diode 12 and to select breakdown voltage VB be 440 [V]
Left and right.
If alternating voltage VS is within normal range, then DC voltage VC also (punctures in normal range
Below voltage VB), electric current flows through Zener diode 12, the double discharge circuit 10 of abnormal voltage detection hardly
High impedance status is become relative to capacitor 6.Thus, the voltage of the junction point A of resistor 14,16 is i.e.
Detection signal voltage VA is almost 0 [V].On the other hand, when alternating voltage VS exceed normal range and on
Rise, thus when DC voltage VC exceedes breakdown voltage VB, electric current flows through abnormal voltage detection double electric discharge electricity
Road 10.This electric current and " VC-VB " are proportional, so DC voltage VC is the highest, this electric current is the biggest,
Detection signal voltage VA uprises with being also proportional to.
(inverter 20)
As it has been described above, inverter 20 DC voltage VC is converted to three-phase alternating voltage MU, MV,
MW, this is by not shown multiple switch elements, DC voltage VC to be carried out PWM and realize
's.Therefore, the electric current being supplied to inverter 20 from changer 4 returns inverter after flowing through motor 30
20, flow to GND current potential via GH terminal.It addition, the most also can be at GH terminal and GND current potential
Between install overcurrent protection resistance etc..It addition, in order to on/off controls above-mentioned switch element,
Inverter 20 is inputted the control power supply voltage VCC of about 15 [V].
It addition, the VSP terminal of inverter 20 is inputted control instruction voltage VSP.Control instruction voltage
The voltage of VSP e.g. 0～6 [V] left and right, inverter 20 controls three-phase alternating voltage according to voltage levvl
MU、MV、MW.For example, it is possible to control for voltage levvl the highest then three-phase alternating voltage MU, MV,
The frequency of MW becomes the highest, the frequency of voltage levvl the lowest then three-phase alternating voltage MU, MV, MW
Become the lowest.But, if control instruction voltage VSP is not enough predetermined cut-out voltage Voff (such as 1.8 [V]
Left and right), then inverter 20 becomes halted state, stops the defeated of three-phase alternating voltage MU, MV, MW
Go out.It addition, control instruction voltage VSP is that the controls such as speed command, dutycycle instruction, torque instruction are inverse
Become the command voltage of the three-phase alternating voltage output of device 20.
(stopping/recover control circuit 40)
In the inside stopping/recover control circuit 40, the base terminal of transistor 42 is inputted detection signal
Voltage VA, emitter terminal is connected with GND current potential.If detection signal voltage VA becomes transistor
Between the base/emitter of 42 more than saturation voltage, then transistor 42 is on-state.It addition, from not shown
Epigyny device to stop/recover control circuit 40 original control instruction voltage VSP0 is provided.Resistor 46,
Capacitor 48 constitutes low pass filter, removes the radio-frequency component that original control instruction voltage VSP0 includes.
Even if this is to, in the case of original control instruction voltage VSP0 is jumpy, also relax control instruction
The change of voltage VSP.It addition, in order to limit the electric current flowing to transistor 42, at resistor 46 and crystalline substance
Resistor 44 it is connected between the collector terminal of body pipe 42.It addition, resistor 44 is not essential.
If transistor 42 is off state, then flow through the electric current I tr substantially 0 [A] of resistor 44, institute
Thered is provided as control instruction voltage VSP eliminating the original control instruction voltage VSP0 of radio-frequency component
To inverter 20.On the other hand, when transistor 42 is on-state, and electric current I tr flows through transistor 42,
The original control instruction of radio-frequency component will be eliminated by resistor 46, resistor 44 and transistor 42
Voltage after voltage VSP0 carries out dividing potential drop is supplied to inverter 20 as control instruction voltage VSP.
<action of embodiment>
Then, the action example of present embodiment is described.Fig. 2 (a)～(d) represent generation abnormal voltage
The example of the waveform etc. in each portion front and back, Fig. 2 (a) is the oscillogram of the amplitude of alternating voltage VS, figure
2 (b) is the oscillogram of DC voltage VC, and Fig. 2 (c) is the state diagram of transistor 42, Fig. 2 (d)
It it is the oscillogram of control instruction voltage VSP.Value before the moment t1 of alternating voltage VS is VS1,
Moment t1 rises to VS2 stepwise, and the period between moment t1～t6 is stored in VS2, time
Carve t6 and return to VS1 the most stepwise.In the example in the figures, it is assumed that VS1 is that the voltage of standard becomes
Voltage in the range of Dong, VS2 is its voltage of about 2 times.
Before moment t1, in the case of changer 4 is full-wave rectifying circuit, DC voltage VC is
It is substantially equal to the wave height value of alternating voltage VS1Value (VC1).Further, at moment t1
If voltage VS1 rises stepwise, the most after time tl, DC voltage VC increases at leisure.
VC2 is reached at moment t2, DC voltage VC.Voltage VC2 is and the breakdown voltage of Zener diode 12
The value that VB is equal.Therefore, at moment t2, electric current begin to flow through Zener diode 12, resistor 14,
16.Before moment t2, detect signal voltage VA be about 0 [V], but after moment t2, detection
Signal voltage VA proportionally rises with " VC-VB ".
Afterwards, VC3 is reached at moment t3, DC voltage VC.This voltage VC3 is the inspection of junction point A
Survey signal voltage VA and reach the voltage of saturation voltage between the base/emitter of transistor 42.Therefore, such as figure
Shown in 2 (c), it is turned at moment t3 transistor 42.Afterwards, at moment t4, DC voltage
VC reaches VC4.This voltage VC4 is that control instruction voltage VSP becomes the voltage cutting off voltage Voff.
Thus, inverter 20 becomes halted state, stops the output of three-phase alternating voltage MU, MV, MW.
Afterwards, VC5 is become at moment t5, DC voltage VC.Voltage VC5 is all wave rectification at changer 4
In the case of circuit, it is that the alternating voltage VS with this time point i.e. wave height value of voltage VS2 is roughly equal
Value.
Here, with reference to Fig. 3, the relation between DC voltage VC and control instruction voltage VSP is described.?
In example illustrated, it is assumed that the original control instruction voltage VSP0 provided from not shown epigyny device is solid
Definite value (6 [V]).When DC voltage VC is lower than voltage VC3, flow through the electric current I tr (ginseng of transistor 42
According to Fig. 1) substantially 0 [A], so control instruction voltage VSP and original control instruction voltage VSP0 is substantially
Equal.But, if DC voltage VC is at more than voltage VC3, then electric current I tr becomes with " VC-VB "
Ratio, therefore control instruction voltage VSP wants to produce in low resistance device 46 than original control instruction voltage VSP0
The amount of raw voltage drop.
But, when DC voltage VC is near voltage VC3, the connection resistance of transistor 42 is big, because of
This electric current I tr becomes smaller, and control instruction voltage VSP becomes close to original control instruction voltage VSP0
Value.If DC voltage VC becomes near the intermediate value of voltage VC3, VC4, then transistor 42
Connection resistance diminishes, and can flow through bigger electric current I tr, and control instruction voltage VSP is relative to DC voltage
The slope of VC becomes big.Further, if as it has been described above, DC voltage VC becomes more than VC4, then controlled
Command voltage VSP become cut off below voltage Voff, therefore inverter 20 stop three-phase alternating voltage MU,
The output of MV, MW.
Return Fig. 2, if being again restored to VS1 at moment t6 alternating voltage VS, the then electricity of capacitor 6
Lotus starts electric discharge via the double discharge circuit 10 (with reference to Fig. 1) of abnormal voltage detection.Moment t7 later,
If control instruction voltage VSP exceedes cut-out voltage Voff, then inverter 20 becomes operating state.That is,
While corresponding with control instruction voltage VSP, restart three-phase alternating voltage MU, MV, MW
Output.Such as, three-phase alternating voltage is restarted with the frequency corresponding with control instruction voltage VSP
The output of MU, MV, MW.Moment t8 later, if DC voltage VC is less than VC3, then
Transistor 42 becomes dissengaged positions, and control instruction voltage VSP becomes and original control instruction voltage VSP0
Equal.Thus, the action of motor drive reverts to steady statue, motor 30 with original control
Speed corresponding for command voltage VSP0 processed is driven in rotation.
Moment t9 later, if DC voltage VC is less than the VC2 (breakdown potential of Zener diode 12
Pressure VB), then electric current flows through the double discharge circuit 10 of abnormal voltage detection hardly.Therefore, moment t9 with
After, disappeared by the electric discharge naturally in each portion in motor drive and the electric power with motor-driven
Consumption, DC voltage VC is slowly close to VC1.Here, make voltage VC4 than voltage VC2 (breakdown voltage
VB) height is also one of feature of present embodiment.According to this feature, by accelerating the voltage of more than VC4
Electric discharge shorten time of overvoltage condition, and become predetermined cut-out at control instruction voltage VSP
After more than voltage Voff, the double discharge circuit 10 of abnormal voltage detection also is able to continue electric discharge.
As it has been described above, according to present embodiment, if alternating voltage VS exceedes normal range and rises, and
And rise also above normal range from the DC voltage VC of capacitor 6 output, then abnormal voltage detection is held concurrently
The detection signal voltage VA that discharge circuit 10 output is corresponding with DC source VC, it is possible to by this inspection
Survey signal voltage VA and transistor 42 is set to on-state to stop inverter 20.Further, if exchanged
Voltage VS returns to normal range, then the double discharge circuit 10 of abnormal voltage detection will be accumulated at capacitor 6
In electric charge promptly discharge, it is possible to make DC voltage VC promptly return to normal range.
Further, when DC voltage VC is within normal range, electric current flows through abnormal voltage detection hardly
Double discharge circuit 10, the consumption electric power in discharge circuit 10 it is possible to suppression abnormal voltage detection is held concurrently.And
And, the double discharge circuit 10 of abnormal voltage detection has " detection of abnormal voltage " and the function of " electric discharge " concurrently,
Therefore compared with the situation being independently arranged the circuit of function respectively, it is possible to cut down in motor drive
Components number.
[the second embodiment]
Then, the motor drive of second embodiment of the invention is described with reference to the block diagram shown in Fig. 4
Structure.
In the present embodiment, the inverter 130 shown in application drawing 4 replaces the inversion of the first embodiment
Device 20.This inverter 130 is inputted binary signal i.e. control signal SD.If control signal SD becomes
H (high) level (voltage more than predetermined threshold), then inverter 130 becomes operating state, by three-phase
Alternating voltage MU, MV, MW export to motor 30.On the other hand, if control signal SD becomes
For L (low) level (less than the voltage of above-mentioned threshold value), then inverter 130 becomes halted state, stops
The output of three-phase alternating voltage MU, MV, MW.It addition, the inverter 130 of present embodiment also and
The inverter 20 of the first embodiment similarly sets three-phase alternating voltage according to control instruction voltage VSP
MU、MV、MW.But, in the present embodiment, do not operate control instruction according to DC voltage VC
Voltage VSP, therefore omits the diagram of relevant circuit.
It addition, in the present embodiment, the stopping shown in application drawing 4/recovery control circuit 50 replaces
The stopping of one embodiment/recovery control circuit 40.Stopping/recovering the inside of control circuit 50 to crystal
The base terminal input detection signal voltage VA of pipe 52, emitter terminal is connected with GND current potential.It addition,
Collector terminal is connected with one end of resistor 51, and the other end at resistor 51 applies control power supply electricity
Pressure VCC.Further, the voltage of the collector terminal of transistor 52 is supplied to inverse as control signal SD
Become device 130.It addition, the structure (Fig. 1) of the structure other than the above of present embodiment and the first embodiment
Identical.
In said structure, when DC voltage VC is in normal range, electric current flows through abnormal electric hardly
The double discharge circuit 10 of pressure detection, so detection signal voltage VA is almost 0 [V].Therefore, transistor 52
Becoming dissengaged positions, control signal SD is pulled up by resistor 51, becomes H level.So,
Inverter 130 becomes operating state, exports three-phase alternating voltage MU, MV, MW to motor 30.
On the other hand, if DC voltage VC becomes more than breakdown voltage VB of Zener diode 12,
The electric current then flowing through the double discharge circuit 10 of abnormal voltage detection is proportional to " VC-VB ".If unidirectional current
Pressure VC uprises further, and detection signal voltage VA becomes saturated electricity between the base/emitter of transistor 52
More than pressure, then transistor 52 is turned on.So, control signal SD become the value close to 0 [V],
I.e. L level, so inverter 130 becomes halted state, stops three-phase alternating voltage MU, MV, MW
Output.
As it has been described above, according to present embodiment, identical with the first embodiment, it is possible to according to DC voltage
Operating state/the halted state of VC switching inverter 130, reaches the effect same with the first embodiment.
[the 3rd embodiment]
Then, the motor-driven dress of third embodiment of the present invention is described with reference to the block diagram shown in Fig. 5
The structure put.
Control signal NSD that the inverter 140 of present embodiment inputs negative logic replaces the second enforcement
Control signal SD in mode.That is, if control signal NSD becomes L level (less than predetermined threshold
The voltage of value), then inverter 140 becomes operating state, by defeated to three-phase alternating voltage MU, MV, MW
Go out to motor 30.On the other hand, if control signal NSD becomes H level (more than above-mentioned threshold value
Voltage), then inverter 140 becomes halted state, stops the defeated of three-phase alternating voltage MU, MV, MW
Go out.It addition, in the present embodiment, the stopping shown in application drawing 5/recovery control circuit 60 replaces
The stopping of two embodiments/recovery control circuit 50.Stop/recover control circuit 60 by an electric wire 61
Constituting, the detection signal voltage VA exported from the double discharge circuit 10 of abnormal voltage detection is made by this electric wire 61
It is supplied to inverter 140 for control signal NSD.The structure other than the above of present embodiment and second is in fact
The structure (Fig. 4) executing mode is identical.
In said structure, when DC voltage VC is in normal range, electric current flows through abnormal electric hardly
The double discharge circuit 10 of pressure detection, so detection signal voltage VA substantially 0 [V].Therefore, control signal
NSD becomes L level, and therefore inverter 140 becomes operating state, by three-phase alternating voltage MU, MV,
MW exports to motor 30.On the other hand, if DC voltage VC becomes hitting of Zener diode 12
Wear more than voltage VB, then the electric current flowing through the double discharge circuit 10 of abnormal voltage detection becomes with " VC-VB "
Ratio.If DC voltage VC uprises further, detection signal voltage VA becomes more than above-mentioned threshold value,
Then control signal NSD becomes H level, so inverter 140 becomes halted state, stops three-phase alternating current
The output of voltage MU, MV, MW.
As it has been described above, according to present embodiment, identical with first, second embodiment, it is possible to according to direct current
Operating state/the halted state of voltage VC switching inverter 140, reaches and first, second embodiment
Identical effect.And then, the stopping of present embodiment/recovery control circuit 60 and first, second embodiment party
The stopping of formula/recovery control circuit 40,50 is compared, simple in construction, it is possible to realizes cost and declines.
[the 4th embodiment]
Then, with reference to the block diagram shown in Fig. 6, the motor drive of four embodiment of the invention is described
Structure.
In the present embodiment, the inverter 150 with RS terminal is applied to replace the first embodiment
Inverter 20 (Fig. 1).It addition, describe the function of RS terminal below.
It addition, abnormal voltage detection in the present embodiment is held concurrently in discharge circuit 110, in the company of being sequentially connected in series
After connecing Zener diode 12 and 3 resistors 14,16,18, it is connected with GND current potential.It addition,
Resistor 18 is low-resistance by-passed resistor.The junction point D of resistor 16,18 via electric wire 74 with
The GH terminal of inverter 150 connects.It addition, the detection signal electricity of the junction point A of resistor 14,16
Pressure VA is connected with the RS terminal of inverter 150 via electric wire 72.These electric wires 72,74 are included in
In stopping in present embodiment/recovery control circuit 70.
Here, the function of the GH terminal of inverter 150 is identical with the function of the first embodiment (Fig. 1),
It it is the terminal for the electric current flowing through motor 30 being flowed to GND current potential.As in the present embodiment,
If connecting resistor 18, then the voltage VD of GH terminal and stream between GH terminal and GND current potential
The current in proportion ground crossing resistor 18 rises, if therefore measuring voltage VD, is then capable of detecting when inverse
Become in device 150 and whether flow through overcurrent.Therefore, voltage VD is referred to as " consumption current versus voltage ".
In common using method, RS terminal is connected with GH terminal, according to consuming current versus voltage
Whether VD has exceeded predetermined threshold value VDth is come whether detection of excessive current has flow through inverter 150.But,
In the present embodiment, as shown in Figure 6, RS terminal is connected with junction point A.Therefore, this meaning is described.
If DC voltage VC is less than breakdown voltage VB of Zener diode 12, then electric current flows through resistance hardly
Device 14,16, so, detection signal voltage VA becomes equal with consuming current versus voltage VD.
Therefore, identical with the situation of common using method, inverter 150 is according to detection signal voltage VA
And the comparative result between threshold value VDth, it is possible to detect in inverter 150 whether produce overcurrent.Separately
On the one hand, if DC voltage VC becomes more than breakdown voltage VB of Zener diode 12, then resistance
Device 16 flows through the electric current proportional to " VC-VB ", so, detection signal voltage VA specific consumption electricity
Stream corresponding voltage VD exceeds the amount of the voltage drop in resistor 16.The knot other than the above of present embodiment
The structure (Fig. 1) of structure and the first embodiment is identical.
In said structure, when DC voltage VC is in normal range, detection signal voltage VA becomes
Substantially equal with consuming current versus voltage VD.Therefore, as long as overcurrent does not flow through inverter 150,
Inverter 150 just becomes operating state, exports three-phase alternating voltage MU, MV, MW to motor
30.On the other hand, if DC voltage VC becomes more than breakdown voltage VB of Zener diode 12,
Then electric current flows through the double discharge circuit 110 of abnormal voltage detection, and detection signal voltage VA becomes specific consumption electric current
Corresponding voltage VD wants height.If DC voltage VC uprises further, detection signal voltage VA exceedes threshold
Value VDth, then inverter 150 becomes halted state, stops three-phase alternating voltage MU, MV, MW
Output.
As it has been described above, according to present embodiment, with first～the 3rd embodiment identical, it is possible to according to direct current
Operating state/the halted state of voltage VC switching inverter 150, reaches and first～the 3rd embodiment phase
Same effect.And then, in the present embodiment, use the RS terminal of overcurrent detection to switch inversion
Operating state/the halted state of device 150, therefore, it is possible to detect " inverse via public terminal (RS terminal)
Become the overcurrent in device 150 " and " exception of DC voltage VC ", so, and detect both sides' respectively
Situation compares, it is possible to simplifies circuit structure, and is capable of cost reduction.
[the 5th embodiment]
Then, with reference to the block diagram shown in Fig. 7, the motor-driven dress of the 5th embodiment of the present invention is described
The structure put.
In the present embodiment, the stopping shown in application drawing 7/recovery control circuit 80 replaces the first enforcement
The stopping of mode/recovery control circuit 40 (with reference to Fig. 1).In the inside pair stopping/recover control circuit 80
The base terminal input detection signal voltage VA of transistor 84, emitter terminal is connected with GND current potential.
It addition, collector terminal is connected, to relay coil with one end of the relay coil 82b of relay 82
The other end of 82b applies control power supply voltage VCC.Further, control power supply voltage VCC is via continuing
The relay tip 82a of electrical equipment 82 and be provided to the VCC terminal of inverter 20.Here, when flowing through
When the electric current of relay coil 82b is less than predetermined threshold value, relay tip 82a is turned on, should
When electric current is more than this threshold value, relay tip 82a becomes dissengaged positions.Present embodiment above-mentioned beyond
Structure identical with the structure of the first embodiment (Fig. 1).
In said structure, when DC voltage VC is in normal range, electric current flows through abnormal electric hardly
The double discharge circuit 10 of pressure detection, so detection signal voltage VA substantially 0 [V].Therefore, transistor 84
Becoming dissengaged positions, electric current flows through relay coil 82b, relay coil 82b hardly becomes connection shape
State.So, control power supply voltage VCC is supplied to the VCC terminal of inverter 20, inverter 20
On/off controls the switch element (not shown) that it is internal, by three-phase alternating voltage MU, MV, MW
Output is to motor 30.
On the other hand, if DC voltage VC becomes more than breakdown voltage VB of Zener diode 12,
The electric current then flowing through the double discharge circuit 10 of abnormal voltage detection is proportional to " VC-VB ".If unidirectional current
Pressure VC uprises further, and detection signal voltage VA becomes saturated electricity between the base/emitter of transistor 84
More than pressure, then transistor 84 is turned on.If electric current more than above-mentioned threshold value flows through relay line
Circle 82b, then relay tip 82a becomes dissengaged positions.So, inverter 20 does not provide control use
Supply voltage VCC, the output of three-phase alternating voltage MU, MV, MW also stops.
Above, according to present embodiment, with first～the 4th embodiment identical, it is possible to according to DC voltage
VC switches the on/off state of inverter 20, reaches and first～the 4th same effect of embodiment.
[the 6th embodiment]
Then, the motor-driven dress of the 6th embodiment of the present invention is described with reference to the block diagram shown in Fig. 8
The structure put.
In the present embodiment, abnormal voltage detection holds concurrently discharge circuit 120 by Zener diode 12, resistance
Device 14 and relay coil 19 are connected in series, and are connected with GND current potential by relay coil 19.Separately
Outward, the stopping shown in application drawing 8/recovery control circuit 90 replaces the stopping/recovery control of the 5th embodiment
Circuit 80 (with reference to Fig. 7) processed.Stop/recover control circuit 90 to have by flowing through relay coil 19
Electric current is switched on/relay tip 92 of dissengaged positions.Apply to control to one end of relay tip 92
Using supply voltage VCC, the other end connects the VCC terminal of inverter 20.
Relay tip 92 becomes connection shape when the electric current flowing through relay coil 19 is less than predetermined threshold value
State, if this electric current is more than this threshold value, becomes dissengaged positions.As is well known, relay coil
If 19 have electric current to flow through, produce magnetic flux, and drive relay tip 92 by this magnetic flux.Therefore,
In the present embodiment, " magnetic flux produced by relay coil 19 " is " detection signal ", stop/
Recover control circuit 90 and control inverter 20 by having relay tip 92 according to this detection signal.
The structure other than the above of present embodiment is identical with the structure (Fig. 7) of the 5th embodiment.
In said structure, when DC voltage VC is in normal range, electric current flows through abnormal voltage hardly
The double discharge circuit 120 of detection, so relay tip 92 is on-state.So, to inverter 20
VCC terminal provides control power supply voltage VCC, and inverter 20 on/off controls the switch that it is internal
Element (not shown), and three-phase alternating voltage MU, MV, MW are exported to motor 30.
On the other hand, if DC voltage VC becomes more than breakdown voltage VB of Zener diode 12,
Then electric current flows through the double discharge circuit 120 of abnormal voltage detection.If DC voltage VC uprises further, flow through
The electric current of relay coil 19 becomes more than above-mentioned threshold value, then relay tip 92 becomes dissengaged positions.This
Sample, does not provide control power supply voltage VCC, three-phase alternating voltage MU, MV, MW to inverter 20
Output also stop.
As it has been described above, according to present embodiment, with first～the 5th embodiment identical, it is possible to according to direct current
Voltage VC switches the on/off state of inverter 20, reach with first～the 5th embodiment same
Effect.
[variation]
The invention is not restricted to above-mentioned embodiment, it is possible to have various deformation.Above-mentioned embodiment is to hold
The explanation present invention and the illustration that carries out intelligibly, it is not necessary to be limited to possess illustrated structured side
Formula.It addition, a part for the structure of certain embodiment can be replaced into the structure of other embodiments,
It addition, also be able to the structure of certain embodiment is increased the structure of other embodiments.It addition, can be right
A part for the structure of each embodiment carries out deleting or the additional/displacement of other structures.Such as can be to upper
Stating the deformation that embodiment carries out is following deformation.
(1) in the first, second, the 5th embodiment (Fig. 1, Fig. 4, Fig. 7), can add and make
The resistor of the having stable behavior of the transistor 42,52,84 used.Fig. 9 represents the first embodiment
(Fig. 1) example of the structure of resistor has been added.The structure of Fig. 9 and the structure of Fig. 1 are almost same, but
It is, in stopping/recovery control circuit 40A replacing stopping/recover control circuit 40 and arrange, different
Often voltage detecting is held concurrently and is inserted electricity between the junction point A in discharge circuit 10 and the base terminal of transistor 42
Resistance device 41, connects between the base terminal and emitter terminal of transistor 42 and has resistor 43.It addition,
Also serve as " transistor " enclosed including transistor 42 and resistor 41,43 in an encapsulation flows
It is logical, so this transistor can also be applied.
(2) abnormal voltage at the first embodiment (Fig. 1) detects and holds concurrently in discharge circuit 10, and series connection is even
It is connected to 12, two resistors 14,16 of Zener diode, but Zener diode 12 can also be connected in series
With a resistor, the voltage of their junction point is exported as detection signal voltage VA.
[summary of structure/effect]
As it has been described above, first～the 6th embodiment, have: abnormal voltage detection hold concurrently discharge circuit (10,
110,120), it exceedes predetermined normal range at the DC voltage (VC) exported from capacitor (6)
Time (below breakdown voltage VB), export the detection signal corresponding with above-mentioned DC voltage (VC)
(VA) while making above-mentioned capacitor (6) discharge, on the other hand, above-mentioned normal range include above-mentioned directly
In the case of stream voltage (VC), its impedance becomes to exceed above-mentioned normal model than above-mentioned DC voltage (VC)
Situation about enclosing is higher；With stopping/recovery control circuit (40,50,60,70,80,90), it is according to institute
Stating the new user of detection (VA), inverter (20,130,140,150) is set to halted state, this is inverse
Become device above-mentioned DC voltage (VC) is converted to alternating voltage (MU, MV, MW) and is supplied to bear
Carry (30).
The double discharge circuit (10,110,120) of abnormal voltage detection, exceedes normally at DC voltage (VC)
During scope, the function simultaneously playing output detections signal (VA) and the merit making above-mentioned capacitor (6) discharge
Can, so can also be able to while suitably the electric charge accumulated in capacitor (6) being discharged
Constitute at a low price.
Further, first～the 6th in embodiment, the detection of above-mentioned abnormal voltage hold concurrently discharge circuit (10,
110,120) there is Zener diode (12) and above-mentioned Zener diode (12) is connected in series one
Or multiple resistor (14,16,18), the biggest signal of electric current of above-mentioned Zener diode (12) will be flow through
The signal that level is the biggest exports as above-mentioned detection signal (VA).
It is set to signal the biggest for the biggest signal level of electric current flowing through Zener diode (12) detect signal
(VA), it is possible to simplify the circuit structure of the double discharge circuit (10,110,120) of abnormal voltage detection.
Further, first～the 6th in embodiment, above-mentioned stopping/recovery control circuit (40,50,60,
70,80,90) it is the breakdown voltage than above-mentioned Zener diode (12) by above-mentioned DC voltage (VC)
(VB=VC2) high situation more than predetermined voltage (VC4) as condition, by above-mentioned inverter (20,
130,140,150) it is set to halted state.
In such manner, it is possible to accelerating DC voltage (VC) is the capacitor (6) during more than predetermined voltage (VC4)
Electric discharge, it is possible to shorten overvoltage condition time.
Further, first～the 6th in embodiment, if the above-mentioned DC voltage (VC) of exception becomes
Above-mentioned normal range, the most above-mentioned stopping/recovery control circuit (40,50,60,70,80,90) makes
State inverter (20,130,140,150) and return to operating state.
So, if DC voltage (VC) becomes normal range, then can make inverter (20,130,
140,150) operating state is returned to.
Further, in the first embodiment, above-mentioned inverter (20) is according to the control instruction electricity being provided
Pressure (VSP) controls above-mentioned alternating voltage (MU, MV, MW), and if above-mentioned control instruction
Voltage (VSP) exceedes predetermined cut-out voltage (Voff), then become operating state, if above-mentioned control refers to
Make voltage (VSP) become above-mentioned cut-out voltage (Voff) below, then 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 to above-mentioned cut-out voltage (Voff) below.
In such manner, it is possible to use control instruction voltage (VSP) to carry out the control corresponding with abnormal voltage.
Further, in second, third embodiment, above-mentioned inverter (130,140) is according to being provided
The control signal (SD, NSD) of two-value set operating state and halted state, above-mentioned stopping/extensive
Answer control circuit (50,60) according to above-mentioned detection signal (VA) by above-mentioned control signal (SD, SND)
Value be set to the value corresponding with above-mentioned halted state.
In such manner, it is possible to use the control signal (SD, SND) of two-value to carry out corresponding with abnormal voltage
Control.
Further, in the 4th embodiment, above-mentioned inverter (150) judges according to predetermined overcurrent
The voltage levvl of terminal (RS terminal) judges whether create overcurrent in above-mentioned inverter (150),
Halted state, above-mentioned stopping/recovery control circuit (70) is become in the case of being judged as creating overcurrent
According to above-mentioned detection signal (VA), above-mentioned overcurrent is judged that the voltage of terminal (RS terminal) is set as
The voltage corresponding with overcurrent.
In such manner, it is possible to use overcurrent to judge, terminal (RS terminal) carries out the control corresponding with abnormal voltage
System.
Further, in the five, the 6th embodiments, above-mentioned inverter (20) accepts and above-mentioned unidirectional current
The supply of the control power supply voltage (VCC) of pressure (VC) different voltage carries out action, above-mentioned stops
Only/recover control circuit (80,90) there is cutting portion (82a, 92), it is according to above-mentioned detection signal (VA),
The cutting needle supply to the above-mentioned control power supply voltage (VCC) of above-mentioned inverter (20).
In such manner, it is possible to the cutting-off controlling supply of supply voltage (VCC), carry out corresponding with abnormal voltage
Control.
Claims (8)
1. an inverter control circuit, it is characterised in that
Have:
Abnormal voltage detection is held concurrently discharge circuit, and it exceedes predetermined normal at the DC voltage exported from capacitor
In the case of scope, export the detection signal corresponding with above-mentioned DC voltage and make above-mentioned capacitor put
Electricity, on the other hand, it is in the case of above-mentioned DC voltage was included in above-mentioned normal range, with above-mentioned
DC voltage exceedes the situation phase specific impedance of above-mentioned normal range and uprises；And
Stopping/recover control circuit, inverter is set to halted state according to above-mentioned detection signal by it, and this is inverse
Become device above-mentioned DC voltage is converted to alternating voltage and is supplied to load.
Inverter control circuit the most according to claim 1, it is characterised in that
Above-mentioned abnormal voltage detection discharge circuit of holding concurrently has Zener diode and above-mentioned Zener diode in series
The one or more resistors connected, by the biggest for the biggest signal level of electric current flowing through above-mentioned Zener diode
Signal exports as above-mentioned detection signal.
Inverter control circuit the most according to claim 2, it is characterised in that
Above-mentioned stopping/restoring circuit is with above-mentioned DC voltage for higher than the breakdown voltage of above-mentioned Zener diode
More than predetermined voltage as condition, above-mentioned inverter is set to halted state.
Inverter control circuit the most according to claim 3, it is characterised in that
If the above-mentioned DC voltage of exception becomes above-mentioned normal range, the most above-mentioned stopping/recovery control circuit
Above-mentioned inverter is made to revert to operating state.
Inverter control circuit the most according to claim 4, it is characterised in that
Above-mentioned inverter controls above-mentioned alternating voltage according to the control instruction voltage being provided, if on and
Stating control instruction voltage and exceed predetermined cut-out voltage, the most above-mentioned inverter becomes operating state, if above-mentioned
Control instruction voltage becomes below above-mentioned cut-out voltage, and the most above-mentioned inverter becomes halted state,
Above-mentioned stopping/recovery control circuit according to above-mentioned detection signal, above-mentioned control instruction voltage is set on
State below cut-out voltage.
Inverter control circuit the most according to claim 4, it is characterised in that
Above-mentioned inverter sets operating state and halted state according to the two-value control signal being provided,
The value of above-mentioned control signal, according to above-mentioned detection signal, is set as by above-mentioned stopping/recovery control circuit
The value corresponding with above-mentioned halted state.
Inverter control circuit the most according to claim 4, it is characterised in that
According to predetermined overcurrent, above-mentioned inverter judges that the voltage levvl of terminal judges in above-mentioned inverter
Whether creating overcurrent, in the case of being judged as creating overcurrent, above-mentioned inverter becomes stopping shape
State,
Above-mentioned overcurrent, according to above-mentioned detection signal, is judged the electricity of terminal by above-mentioned stopping/recovery control circuit
Pressure is set as the voltage corresponding with overcurrent.
Inverter control circuit the most according to claim 4, it is characterised in that
Above-mentioned inverter accepts the supply of the control power supply voltage of the voltage different from above-mentioned DC voltage to be come
Carry out action,
Above-mentioned stopping/recovery control circuit has: cutting portion, and it is according to above-mentioned detection signal, cutting needle pair
The supply of the above-mentioned control power supply voltage of above-mentioned inverter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015118791A JP6383328B2 (en) | 2015-06-12 | 2015-06-12 | Inverter control circuit |
| JP2015-118791 | 2015-06-12 |
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| Publication Number | Publication Date |
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| CN106253234A true CN106253234A (en) | 2016-12-21 |
| CN106253234B CN106253234B (en) | 2018-11-09 |
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| CN201610406003.4A Active CN106253234B (en) | 2015-06-12 | 2016-06-08 | Inverter control circuit |
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| JP (1) | JP6383328B2 (en) |
| KR (1) | KR101948976B1 (en) |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508528A (en) * | 2016-06-14 | 2017-12-22 | 福特全球技术公司 | The limitation active discharge circuit certainly of electric vehicle inverter |
| CN111373641A (en) * | 2017-11-30 | 2020-07-03 | 工机控股株式会社 | DC power supply device |
| CN116317816A (en) * | 2023-03-23 | 2023-06-23 | 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 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20160146538A (en) | 2016-12-21 |
| CN106253234B (en) | 2018-11-09 |
| JP2017005903A (en) | 2017-01-05 |
| KR101948976B1 (en) | 2019-02-15 |
| JP6383328B2 (en) | 2018-08-29 |
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