CN102035360B - Pwm cycloconverter device - Google Patents
Pwm cycloconverter device Download PDFInfo
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- CN102035360B CN102035360B CN201010500636.4A CN201010500636A CN102035360B CN 102035360 B CN102035360 B CN 102035360B CN 201010500636 A CN201010500636 A CN 201010500636A CN 102035360 B CN102035360 B CN 102035360B
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
- B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
- B66B1/30—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/021—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions the abnormal operating conditions being independent of the system
Abstract
In a PWM cycloconverter device which is used for an elevator, etc., when an accumulator is used as an auxiliary DC power supply, the regenerated power can not be fully absorbed when a larger regeneration action of a motor occurs. Furthermore when a large capacity capacitor is used, a charging circuit is required. When an abnormity occurs, through connecting one wire for inputting the three-phase power with the accumulator (8), and connecting another wire with a regeneration capacitor (9), the PWM control is performed at a power state with a mode that a bidirectional switch module (7) is connected with the regeneration capacitor (9) and the motor (3). The regeneration capacitor (9) absorbs the regenerated power in the regeneration action of the motor. Additionally, the accumulator (8) charges the regeneration capacitor (9).
Description
Technical field
The present invention relates to a kind of PWM cycloconverter device, by thering is the bidirectional switch of self-extinction of arc ability, directly connect power supply each phase and each phase of outlet side, according to output voltage instruction, ac output voltage is carried out to PWM control.
Background technology
In being applied to the PWM cycloconverter device of existing elevator system etc., even if having in order also to continue operation when power supply generation phase shortage, power failure, unbalanced power supply etc. are abnormal, and connection is switched to the type of stand-by power supply operation.
Used the elevator system of existing PWM cycloconverter device to be connected in three-phase alternating-current supply, by drive unit, motor, elevation and subsidence mechanical for lift, formed, and there is storage battery or large value capacitor as standby DC power supply, or there is single phase alternating current power supply or three-phase alternating current source apparatus as standby AC power.
And, lift switches setting apparatus, phase detecting circuit diverter switch and PWM cycloconverter device with drive unit by power switcher, power supply abnormality detection circuit, input power phase detecting circuit, stand-by power supply phase detecting circuit, stationary phase information generation circuit, phase detecting circuit and forms, and PWM cycloconverter device consists of input filter, input power level sensitive circuit, controller, gate driver and bidirectional switch module.
By above structure, be applied to the PWM cycloconverter device of existing elevator system when three-phase alternating-current supply fault, can not change main circuit structure, accept from the power supply of various stand-by power supplies and carry out the emergency operating (for example, with reference to patent documentation 1) of lift.
Patent documentation 1: the JP 2001-294378 of Japan communique (5-6 page, Fig. 1)
In being applied to the PWM cycloconverter device of existing lift with drive unit etc., because PWM cycloconverter device can carry out power supply regenerative action, therefore while producing larger regenerated electric power by motor such as in elevator car declines time etc., this electric power of regenerating in power supply.Owing to using storage battery as standby DC power supply in storage battery this electric power of Direct Regeneration, therefore there is the storage battery situation of regenerative electric power completely.
And while using large value capacitor as standby DC power supply, by the capacity of selected capacitor rightly, regenerative electric power completely, still needs the charging circuit of capacitor in addition.
Summary of the invention
Therefore, the present invention carries out in view of the above problems, and object is to provide a kind of PWM cycloconverter device, and it has used following standby DC power supply, even produce larger regenerated electric power when regeneration operation, also can absorb this electric power, and not need special charging circuit.
In order to reach above-mentioned purpose, the PWM cycloconverter device of a scheme of the present invention is, input side is connected in the PWM cycloconverter device that three-wire type power supply and outlet side are connected in three-phase motor, and described three-wire type power supply possesses: three-phase alternating-current supply; Three-wire type DC power supply, is connected on two connecting terminals of storage battery between a line in three lines, is connected with two terminals of capacitor for regeneration between another line; And power switcher, described three-phase alternating-current supply and described three-wire type DC power supply are switched to the line output of going forward side by side, this PWM cycloconverter device possesses: bidirectional switch module, is comprised of nine bidirectional switchs that connect three-wire type power supply and three-phase motor; Input power level sensitive circuit, detects the magnitude of voltage of inputting from three-wire type power supply and input voltage value is exported; Input power phase detecting circuit, detects the phase place of three-wire type power supply and input power phase place is exported; Stationary phase information generation circuit, set a plurality of stationary phase information, from described a plurality of stationary phase information, when power regenerating judgment signal represents power running status, select and be connected with the 1st stationary phase information corresponding between the described line of two terminals of described storage battery, when described power regenerating judgment signal represents to regenerate running status, select and be connected with the 2nd stationary phase information corresponding between described regeneration described another line with two terminals of capacitor; Phase detecting circuit diverter switch, switches and exports described input power phase place and the selected the described the 1st or the 2nd stationary phase information according to stand-by power supply switching signal; And controller, according to the output of the output of described input power level sensitive circuit, described stand-by power supply switching signal and described phase detecting circuit diverter switch, PWM method is switched, generated simultaneously and export the connection cut-off signal of bidirectional switch module.
In the PWM of above-mentioned scheme cycloconverter device, preferably controller switches as follows according to stand-by power supply switching signal, according to the output of input power level sensitive circuit, be input voltage value and input power phase place, the PWM method of inputting three-phase alternating current output by three-phase alternating current generates connection cut-off signal, or according to input voltage value and the 1st stationary phase information or the 2nd stationary phase information, the PWM method of inputting three-phase alternating current output by direct current generates connection cut-off signal.
In the PWM of above-mentioned scheme cycloconverter device, preferably possess: output current detection circuit, detects the output current of bidirectional switch module; And power regenerating judging circuit, according to the output electric current measure value of the output voltage instruction of controller output and output current detection circuit output, generate power regenerating judgment signal, stationary phase information generation circuit is when determining power regenerating judgment signal and be dynamic regime, select the 1st stationary phase information, when determining power regenerating judgment signal and be reproduced state, select the 2nd stationary phase information.
In the PWM of above-mentioned scheme cycloconverter device, preferably controller exports stand-by power supply switching signal to power switcher, according to stand-by power supply switching signal, by power switcher, three-phase alternating-current supply and three-wire type DC power supply are switched, according to stand-by power supply switching signal, switch as follows, PWM method by the three-phase alternating current input three-phase alternating current output using the voltage of three-phase alternating-current supply as input generates connection cut-off signal, or the PWM method by the direct current input three-phase alternating current output using the voltage of three-wire type DC power supply as input generates connection cut-off signal.
In the PWM of above-mentioned scheme cycloconverter device, preferably possess and detect the abnormal also power supply abnormality detection circuit of out-put supply anomaly detection signal of three-phase alternating-current supply, stand-by power supply switching signal is abnormity of power supply detection signal, when out-put supply abnormal signal not, by power switcher, switch to three-phase alternating-current supply, when out-put supply anomaly detection signal, by power switcher, switch to three-wire type DC power supply, controller is when output abnormality detection signal not, PWM method by the three-phase alternating current input three-phase alternating current output using the voltage of three-phase alternating-current supply as input generates connection cut-off signal, when the described anomaly detection signal of output, PWM method by the direct current input three-phase alternating current output using the voltage of three-phase dc power supply as input generates connection cut-off signal.
In the PWM of above-mentioned scheme cycloconverter device, preferably controller is when charging with capacitor to regeneration, in the bidirectional switch group forming at 3 bidirectional switchs by connecting each phase of input three-phase and output one phase in bidirectional switch module with three groups, in all bidirectional switch groups, make and the bidirectional switch disconnection that is connected in storage battery and the regeneration input with the common tie point of capacitor and is connected, and connect together with 2 bidirectional switchs that make to be connected with other two inputs at least one bidirectional switch group.
According to PWM cycloconverter device of the present invention, as stand-by power supply, use following device, be connected with storage battery and be connected with capacitor on mutually being connected with another beyond the phase of storage battery, and by the bidirectional switch of PWM cycloconverter device is connected, to connect storage battery and motor in power action, in regeneration action, connect capacitor and motor, can absorb the regenerated electric power in motor regeneration action by capacitor, and not need capacitator charging circuit.
Accompanying drawing explanation
Fig. 1 is the system block diagram of elevator drive of the present invention.
The circuit connection diagram of matrix converter when Fig. 2 is stand-by power supply connection of the present invention.
Fig. 3 represents the charging action of capacitor 9 for regeneration.
The bidirectional switch of matrix converter when Fig. 4 represents power operation connects.
The bidirectional switch of matrix converter when Fig. 5 represents regeneration operation connects.
Symbol description
1-three-phase alternating-current supply; 2-PWM cycloconverter device; 3-motor; 4-load device; 5-power switcher; 6-input filter; 7-bidirectional switch module; 8-storage battery; 9-regeneration capacitor; 10-input power level sensitive circuit; 11-power supply abnormality detection circuit; 12-gate driver; 13-controller; 14-input power phase detecting circuit; 15-stationary phase information generation circuit; 16-output current detection circuit; 17-power regenerating judging circuit; 18-phase detecting circuit diverter switch; 19-stand-by power supply phase detecting circuit; 20-phase detecting circuit switches setting apparatus; The standby three-phase alternating-current supply of 21-; The standby single phase alternating current power supply of 22-; 23-large value capacitor; 24-input filter reactor; 25-input filter capacitor.
Embodiment
Below, with reference to accompanying drawing, embodiments of the present invention are described.
Fig. 1 is the circuit structure diagram shown in one embodiment of the present invention.The present invention uses in the applied existing PWM cycloconverter of system of storage battery as stand-by power supply in the drive system of load that drives the generation regenerated electric powers such as lift, append output current detection circuit 16 and power regenerating judging circuit 17, and, regeneration is connected in to the negative terminal of storage battery with the negative terminal of capacitor, plus end is connected in to residue one phase that does not connect storage battery in input three-phase.
In Fig. 1, PWM cycloconverter device 2 of the present invention consists of input filter 6, input power level sensitive circuit 10, power supply abnormality detection circuit 11, controller 13, input power phase detecting circuit 14, stationary phase information generation circuit 15, output current detection circuit 16, power regenerating judging circuit 17, phase detecting circuit diverter switch 18 and bidirectional switch module 7.And, at the input side of PWM cycloconverter device 2, be connected with power switcher 5, three-phase alternating-current supply 1 and be connected in series with the device of capacitor 9 and storage battery 8 for regeneration.And, at the outlet side of PWM cycloconverter device 2, be connected with motor 3, and motor 3 drives the load device 4 of the such generation regenerated electric power of elevation and subsidence mechanicals.
Three-phase alternating-current supply 1 is connected in bidirectional switch module 7 via power switcher 5 and input filter 6.Bidirectional switch module 7 consists of nine bidirectional switchs, and it connects via the three-phase voltage (R, S, T) of the three-phase alternating-current supply 1 of input filter 6 inputs and all combinations between three-phase output voltage.And the output of bidirectional switch module 7 is respectively connected with motor 3.At this, input filter 6 is the radio-frequency component decay that make to be accompanied by bidirectional switch module switch motion, the device arranging for preventing from flowing to three-phase alternating-current supply 1.In addition, the example as bidirectional switch can list following device etc.: reverse parallel connection is connected with the device of 2 reverse voltage prevention type IGBT; The reverse parallel connection connector that possesses 2 IGBT and diode, is connected to each other or the emitter body that is connected in series connected to one another the collector electrode of IGBT; Or reverse parallel connection is connected with 2 devices that are connected in series body that IGBT and the mutual forward of diode are connected in series; But be not limited to this.
Input power level sensitive circuit 10 detects respectively to each phase voltage value of the three-phase voltage of input filter 6 inputs.Input power phase detecting circuit 14 detects the voltage of two-phase in the three-phase voltage of three-phase alternating-current supply 1, and detected magnitude of voltage is inputed to for example PLL, obtains the phase place of the three-phase voltage of three-phase alternating-current supply 1, usings as input power phase place.It is that storage battery 8 and regeneration are connected between which phase and which phase in input three-phase with capacitor 9 that stationary phase information generation circuit 15 has preset stand-by power supply as phase place.The phase place of this setting is described in the back.When storage battery 8 and regeneration are used as power supply with capacitor 9, according to the power regenerating judgment signal of power regenerating judging circuit 17 outputs, to phase detecting circuit diverter switch 18, export about being connected with the phase of storage battery 8 or being connected with the information of the phase of capacitor 9 for regeneration.An example as the action of power supply abnormality detection circuit 11, detect the voltage of three-phase alternating-current supply 1, by three-phase two phase transformations, detection magnitude of voltage is converted to two phase voltages, according to this two phase voltage, obtain the amplitude of voltage, and then detection magnitude of voltage is inputed to PLL, obtain frequency.Although there is following example, by making when the voltage amplitude of so obtaining is less than predefined magnitude of voltage as having a power failure, make rate of change at voltage amplitude be predefined value when above for owing phase, and to make difference in obtained frequency and predefined rated frequency be that predefined value is that supply frequency is abnormal when above, detect three-phase alternating-current supply 1 abnormal, but so long as other detects the example of the abnormity of power supply that operation counteracts to PWM cycloconverter device, be not limited to this example.When there is detected abnormity of power supply like this, power supply abnormality detection circuit 11 exports abnormity of power supply detection signal to power switcher 5 and phase detecting circuit diverter switch 18.In addition, also can whether use stand-by power supply by the selections such as operating equipment of other setting, by input/output unit or IO device, the operation signal that represents this selection result is inputed to PWM cycloconverter device, and make the signal that has carried out logic OR with abnormity of power supply detection signal replace above-mentioned abnormity of power supply detection signal use etc., to represent to need the signal of stand-by power supply as stand-by power supply switching signal, replace above-mentioned abnormity of power supply detection signal to use.And, predefined value is to set by not shown setting value device etc. in the above description, the structure that this setting value device etc. is connected by communication line by not shown etc. with PWM cycloconverter device 2 can be used set point in PWM cycloconverter device 2.
Controller 13 reads in by not shown setting apparatus by not shown IO device or communicator etc. or sets the set point of the speed for motor 3 set with operating equipment etc. etc., according to these set points, by known vector control method or V/F control method, generate the voltage instruction for motor 3.And, controller 13 bases are by each phase voltage value of input power level sensitive circuit 10 inputs and the phase place of being inputted by input power phase detecting circuit 14 or stationary phase information generation circuit 15, by the PWM method of PWM cycloconverter, according to voltage instruction, to gate driver 12 outputs, drive the gating signal of each bidirectional switch of bidirectional switch module 7.Describe in the back the action that generates this gating signal in detail.Gate driver 12 drives each bidirectional switch of bidirectional switch module 7 according to the gating signal from controller 13 inputs.
Power switcher 5 is when input power source abnormality detection signal not, via input filter 6, directly to the three-phase of bidirectional switch module 7 output three-phase alternating-current supplies 1, export (R, S, T), when having inputted abnormity of power supply detection signal, to there is the voltage of abnormal three-phase alternating-current supply, switch, storage battery 8 and regeneration are inputed to bidirectional switch module with the voltage of capacitor 9 via input filter 6.
Phase detecting circuit diverter switch 18 is when input power source abnormality detection signal not, selection is from the phase information of input power phase detecting circuit 14 and export controller 13 to, when having inputted abnormity of power supply detection signal, select to be stationary phase information and to export controller 13 to from the output of stationary phase information generation circuit 15.
Controller 13 bases are from the input voltage value of input power level sensitive circuit 10 outputs and the input power phase place of exporting from phase detecting circuit diverter switch 18, the connection of gating signal of carrying out each bidirectional switch of bidirectional switch module 7 disconnects, when input power source abnormality detection signal not, generate the gating signal of bidirectional switch module 7, so that bidirectional switch module 7 carries out three-phase alternating current input three-phase alternating current output operation, after input power source abnormality detection signal, according to the input voltage value from input power level sensitive circuit 10 output with from the stationary phase information of phase detecting circuit diverter switch 18 outputs, generate the gating signal of bidirectional switch module 7, so that bidirectional switch module 7 carries out direct current input three-phase alternating current output operation.To generate not be that PWM method by various disclosed known three-phase alternating currents input three-phase alternating currents output PWM cycloconverters is carried out to the gating signal of the bidirectional switch module 7 during input power source abnormality detection signal.
An example of the PWM method of exporting as this three-phase alternating current input three-phase alternating current, according to detected input power phase place, the voltage between lines of amplitude maximum while selecting this phase place from three voltages between lines, select the bidirectional switch of this voltage between lines of output, for this bidirectional switch, determine and connect cut-off signal.And, according to the input voltage value from 10 outputs of input power level sensitive circuit, by two phase voltages are carried out to subtraction, carry out the actual value of the selected voltage between lines of computing, obtain pro rata with the ratio of this voltage between lines value the time ratio of in 1 cycle controlling at PWM, output voltage being exported with voltage instruction now.It is following method, and the time (pulse duration) that the bidirectional switch of so selecting is connected in 1 cycle that PWM controls is time of controlling 1 cycle by PWM to be multiplied by time ratio to determine.And, in other example, also there is following method, in order to improve input current waveform, voltage between lines in 1 cycle that output is controlled at PWM beyond the voltage between lines of amplitude maximum, the PWM method of in 1 cycle controlling at PWM, two voltages that vary in size above being carried out to time division and exporting, or following circuit is set, in DC circuit, be combined with pwm converter and inverter, according to the connection cut-off signal of input power phase place and voltage instruction generation pwm converter and inverter, make the bidirectional switch of corresponding PWM cycloconverter connect the PWM method disconnecting, the present invention can be also this PWM method.
Below, the action of the present invention to input power source abnormality detection signal and while being connected to stand-by power supply describes.An example of the circuit structure of PWM cycloconverter when Fig. 2 represents to connect stand-by power supply of the present invention, SRU, SSU, STU, SRV, SSV, STV, SRW, SSW, STW are nine bidirectional switchs of bidirectional switch module.While being connected to stand-by power supply, bidirectional switch module 7 is supplied with power electric power from storage battery 8 to motor 3 when carrying out power operation, when regenerating operation, is regenerating with accumulating the regenerated electric power from motor 3 in capacitor 9.
While having connected stand-by power supply as Fig. 2, the regeneration such as also had before bringing into operation with capacitor 9, not put aside the situation of electric charge, now regeneration is 0V with the voltage of capacitor 9, by the voltage of the detected S phase of input power level sensitive circuit 10, T phase, is also 0V.The unit that now, need to charge with capacitor 9 to regeneration.To regeneration, while charging with capacitor 9, controller 13 is exported gating signals to gate driver 12, to make the bidirectional switch of bidirectional switch module 7 become some in following seven switch motion states.
(1) SRU: connect; SSU: disconnect; STU: connect; SRV: disconnect; SSV: disconnect; STV: disconnect; SRW: disconnect; SSW: disconnect; STW: disconnect
(2) SRU: disconnect; SSU: disconnect; STU: disconnect; SRV: connect; SSV: disconnect; STV: connect; SRW: disconnect; SSW: disconnect; STW: disconnect
(3) SRU: disconnect; SSU: disconnect; STU: disconnect; SRV: disconnect; SSV: disconnect; STV: disconnect; SRW: connect; SSW: disconnect; STW: connect
(4) SRU: connect; SSU: disconnect; STU: connect; SRV: connect; SSV: disconnect; STV: connect; SRW: disconnect; SSW: disconnect; STW: disconnect
(5) SRU: disconnect; SSU: disconnect; STU: disconnect; SRV: connect; SSV: disconnect; STV: connect; SRW: connect; SSW: disconnect; STW: connect
(6) SRU: connect; SSU: disconnect; STU: connect; SRV: disconnect; SSV: disconnect; STV: disconnect; SRW: connect; SSW: disconnect; STW: connect
(7) SRU: connect; SSU: disconnect; STU: connect; SRV: connect; SSV: disconnect; STV: connect; SRW: connect; SSW: disconnect; STW: connect
These seven switch motion states generate the circuit shown in Fig. 3 equivalently, and this circuit is be connected in parallel storage battery and capacitor, charging circuit capacitor 9 being charged with the polarity shown in Fig. 3.By contrasting with the connection layout of nine bidirectional switchs shown in Fig. 2, the circuit of known switch S R, SS based on Fig. 3, ST be actually based on connect input three-phase each mutually and being connected in parallel of three groups of circuit of three bidirectional switch groups (SRU, SS U, STU) of output one phase, (SRV, SSV, STV), (SRW, SSW, STW).Described seven switch motion states shown in equivalent electric circuit are as shown in Figure 3, in all three bidirectional switch groups, make and the switch opens that is connected in the input of storage battery 8 with the common tie point of capacitor 9 and is connected, and closed together with two bidirectional switchs that at least make to be connected with input beyond the input mutually that is connected in common tie point in a bidirectional switch group.By these switch motion states, the voltage of storage battery 8 is added to regeneration with on capacitor 9, with the polarity shown in Fig. 3, regeneration is charged with capacitor 9.In several bidirectional switch groups, closed 2 bidirectional switchs can be determined as follows, consider the rated current of bidirectional switch, to do not flow through charging current more than rated current on bidirectional switch.In addition, in the switch motion state of above-mentioned (1)～(7), for example exist (SRV, SSV, STV) as (1), (SRW, SSW, STW), in bidirectional switch group, comprise being all the state of the bidirectional switch group opened.Two switches beyond the bidirectional switch of the common tie point that is connected in storage battery 8 and capacitor 9 in the included bidirectional switch of these bidirectional switch groups are one of closure arbitrarily also.In the example of the bidirectional switch group (SRV, SSV, STV) of (1), also can make any one closure of SRV, STV.Even if this is because make these switch closures also can not produce new closed circuit, the circuit of the charging circuit of storage battery and the switch motion state based on shown in (1) is just the same.
Below, after charging with capacitor 9 in regeneration, used the situation of stand-by power supply to describe.After input power source abnormality detection signal, the stationary phase information that phase detecting circuit diverter switch 18 generates stationary phase information generation circuit 15 exports controller 13 to.There is following situation in an example as stationary phase information, storage battery 8 and regeneration is replaced with to phase place with capacitor 9 with which information that is connected of inputting three-phase and represent.Between the R phase, S phase, T that storage battery 8 and regeneration are connected to three-phase alternating-current supply 1 with capacitor 9 by power switcher 5 certain phase in mutually.As an example of stationary phase information, between representing that R phase and S are mutually, when it becomes the maximum of plus or minus for the phase voltage in R phase from the phase place of input power phase detecting circuit 14 outputs.Equally, between representing that S phase and T are mutually, its when becoming the maximum of plus or minus in the phase voltage of S phase from the phase place of input power phase detecting circuit 14 outputs, between representing that T phase and R are mutually, when it becomes the maximum of plus or minus for the phase voltage in T phase from the phase place of input power phase detecting circuit output.Due to Fig. 2 in the situation that, the plus end of storage battery 8 is connected in R phase, and negative terminal is connected in S phase, when the phase voltage that is therefore R phase for the stationary phase information of storage battery 8 is positive maximum from the phase place of input power phase detecting circuit 14 outputs.And because regeneration is connected in S phase with the negative terminal of capacitor 9, plus end is connected in T phase, the phase place of exporting from input power phase detecting circuit 14 while therefore becoming negative maximum for regeneration by the phase voltage that the phase information of capacitor 9 is S phase.So, stationary phase information can be also R phase and S phase, S phase and T phase, T phase and R this combination of three groups and identification represent respectively the to do for oneself symbolism signal of positive maximum or negative 6 states of maximum total mutually in above-mentioned input three-phase.
The judgement of power and regeneration is output electric current measure value by being detected by from the output current of 16 pairs of PWM cycloconverters of output current detection circuit to power regenerating judging circuit 17 input and originally by the output voltage instruction of controller 13 computings, and undertaken by power regenerating judging circuit 17.Power regenerating judging circuit 17 is according to differentiating result to controller 13 and stationary phase information generation circuit 15 outputting power regeneration judgment signal.
Power regenerating judging circuit 17 is obtained the phase difference of output voltage and output current according to output phase voltage directive and output electric current measure value.In order to obtain phase difference
power regenerating judging circuit 17 possesses vector change-over circuit, it is changed by common well-known three-phase → two-phase (d-q axle), three-phase is exported to phase voltage directive and three-phase output electric current measure value is converted to respectively the vector on d-q coordinate, this vector change-over circuit output is by the output voltage vector of output phase voltage directive conversion and the output current vector of being changed by output electric current measure value.Due to phase difference
be above-mentioned two angles that vector becomes, so power regenerating judging circuit 17 possess the phase difference computing circuit at the angle that these two vectors of computing become.As a concrete example, as the phase angle θ of the output voltage of giving a definition, output current.At this, X means the vector of voltage, electric current etc., is which all establishment conventionally of output voltage vector, output current vector, can be any one.And, X
dthe d axle composition that represents vector X, X
qrepresent vector X's
qaxle composition.
X
d>=0, X
q>=0 o'clock
θ=sin
-1(X
d/√(X
d 2+X
q 2))
X
d>=0, X
q<0 or X
d<0, X
qduring <0
θ=π―sin
-1(X
d/√(X
d 2+X
q 2))
X
d<0, X
q>=0 o'clock
θ=2π+sin
-1(X
d/√(X
d 2+X
q 2))
Above phase angle θ is the angle that vector X becomes with d axle, if make this phase angle θ obtaining for output current, output voltage respectively be respectively θ i
out, θ v
out, can through type (1) obtain the phase difference of output voltage and output current
.
The phase difference of phase difference computing circuit through type (1) computing output voltage and output current
.Power regenerating judging circuit 17 possesses phase difference detection unit, and phase difference detection unit judges that by following decision method PWM cycloconverter is in service or in service in regenerating in power.
time
Power operation
time
Regeneration operation
In addition, also can as stand-by power supply, be to use storage battery 8 or use capacitor 9 for regeneration by the selections such as operating equipment of other setting, by input/output unit or IO device, the operation signal that represents this selection result is inputed to PWM cycloconverter device, and make the signal that has carried out logic OR with power regenerating judgment signal replace above-mentioned abnormity of power supply detection signal use etc., using use storage battery 8 and regeneration with which selection signal of capacitor 9 as controlling switching signal, replace above-mentioned power regenerating judgment signal to use.
Fig. 4 means when being judged to be when power moves according to power regenerating judgment signal, and the gating of exporting by controller 13 drives signal to connect the connection layout of bidirectional switch of the bidirectional switch module 7 of disconnection.In figure, by the bidirectional switch shown in solid line, connect disconnection, and disconnected all the time by the switch shown in dotted line.SRU is for connecting the bidirectional switch of the positive side of storage battery 8 and the U phase of motor 3, and SRV, SRW are, the bidirectional switch of W phase too for the difference V phase of connecting motor 3.SSU is for connecting the bidirectional switch of the minus side of storage battery 8 and the U phase of motor 3, and SSV, SSW are, the bidirectional switch of W phase too for the difference V phase of connecting motor 3.By the gating that only above-mentioned six bidirectional switchs are exported according to controller 13, drive signal to connect disconnection, motor 3 is only connected in storage battery 8, and carries out to the PWM control of the voltage of motor 3 outputs according to the voltage of storage battery 8.Above gating drives the action of signal to be equivalent to the voltage between lines of selecting amplitude maximum in the PWM method of the three-phase alternating current input three-phase alternating current output PWM cycloconverter when not inputting described abnormity of power supply detection signal and goes forward side by side in the PWM method of line output, the phase place of input voltage be voltage between lines maximum that R phase-S is alternate and R phase phase voltage on the occasion of phase place time gating drive the action of signal.Stationary phase information generation circuit 15 is being judged as when power moves according to power regenerating judgment signal, as the stationary phase information for described storage battery 8, to the following phase place of phase detecting circuit diverter switch 18 output, the voltage between lines maximum that R phase-S is alternate and the phase voltage of R phase be on the occasion of phase place (example of the 1st stationary phase information).Thereby, controller 13 switches to the go forward side by side PWM method (example of the PWM method of direct current input three-phase alternating current output) of line output of the voltage between lines of selecting amplitude maximum by PWM method, according to via phase detecting circuit diverter switch 18 from the stationary phase information of stationary phase information generation circuit 15 input and by subtraction according to the magnitude of voltage of the storage battery 8 of the input voltage value computing from 10 outputs of input power level sensitive circuit, generate the connection cut-off signal of bidirectional switch.
Fig. 5 means that the gating of exporting by controller 13 drives signal to connect the connection layout of the bidirectional switch of the bidirectional switch module 7 disconnecting when being judged to be in regeneration operation according to power regenerating judgment signal.The same with Fig. 4, by the bidirectional switch shown in solid line, connect disconnection, and disconnected all the time by the switch shown in dotted line.STU is for connecting the bidirectional switch of the positive side of capacitor 9 and the U phase of motor 3 for regeneration, and STV, STW are, the bidirectional switch of W phase too for the difference V phase of connecting motor 3.SSU is for connecting the bidirectional switch of the minus side of capacitor 9 and the U phase of motor 3 for regeneration, and SSV, SSW are, the bidirectional switch of W phase too for the difference V phase of connecting motor 3.By above-mentioned six bidirectional switchs only, according to the gating of controller 13 outputs, drive signal to connect disconnections, motor 3 is only connected in capacitor 9 for regeneration, and according to regeneration, with the voltage of capacitor 9, carries out the PWM control of the voltage exported to motor 3.Above gating drives the action of signal to be equivalent to the voltage between lines of selecting amplitude maximum in the PWM method of the three-phase alternating current input three-phase alternating current output PWM cycloconverter when not inputting described abnormity of power supply detection signal and goes forward side by side in the PWM method of line output, and the gating when phase place of input voltage is the phase voltage of voltage between lines maximum that S phase-T is alternate and the S phase phase place that is negative value drives the action of signal.Stationary phase information generation circuit 15 is when being judged as in regeneration according to power regenerating judgment signal, as the stationary phase information with capacitor 9 for described regeneration, the phase place (example of the 2nd stationary phase information) that phase voltage from S phases to phase detecting circuit diverter switch 18 that export is negative value.Thereby, controller 13 be judged as when the operation of described power the same, by selecting the go forward side by side PWM method of line output of the voltage between lines of amplitude maximum, according to the stationary phase information of inputting from stationary phase information generation circuit 15 via phase detecting circuit diverter switch 18 and by subtraction, according to the output from input power level sensitive circuit 10, be the magnitude of voltage of the regeneration use capacitor 9 of input voltage value computing, the connection cut-off signal of generation bidirectional switch.
In addition, the PWM method of direct current input three-phase output can be also following method, if directly do not specified by phase information between the line of input direct voltage, select the bidirectional switch connecting corresponding to the two-phase between this line and output three-phase, ratio according to voltage instruction with DC voltage value by 10 computings of input power level sensitive circuit, obtains the time ratio that output voltage is exported.Now, the stationary phase information that stationary phase information generation circuit 15 generates is so long as R phase and S phase, S phase and T phase, T phase and R this combination of three groups and identification represent respectively the to do for oneself symbolism signal of positive maximum or negative 6 states of maximum total mutually in input three-phase.
By above structure, in PWM cycloconverter device of the present invention when there is not abnormity of power supply, carry out three-phase input three-phase output operation, when there is abnormity of power supply, in power when operation, is only used storage battery 8, only using capacitor 9 for regeneration during regeneration operation, can regenerative electric power and carry out direct current input three-phase alternating current output operation, and in regeneration when not putting aside electric charge in capacitor 9, can also with capacitor 9, charge from 8 pairs of regeneration of storage battery.
Claims (10)
1. a PWM cycloconverter device, is characterized in that,
Input side is connected in the PWM cycloconverter device that three-wire type power supply and outlet side are connected in three-phase motor,
Described three-wire type power supply possesses: three-phase alternating-current supply; Three-wire type DC power supply, is connected on two connecting terminals of storage battery between a line in three lines, is connected with two terminals of capacitor for regeneration between another line; And power switcher, described three-phase alternating-current supply and described three-wire type DC power supply are switched to the line output of going forward side by side,
This PWM cycloconverter device possesses:
Bidirectional switch module, is comprised of nine bidirectional switchs that connect described three-wire type power supply and described three-phase motor;
Input power level sensitive circuit, detects the magnitude of voltage of inputting from described three-wire type power supply and input voltage value is exported;
Input power phase detecting circuit, detects the phase place of described three-wire type power supply and input power phase place is exported;
Stationary phase information generation circuit, set a plurality of stationary phase information, from described a plurality of stationary phase information, when power regenerating judgment signal represents power running status, select and be connected with the 1st stationary phase information corresponding between the described line of two terminals of described storage battery, when described power regenerating judgment signal represents to regenerate running status, select and be connected with the 2nd stationary phase information corresponding between described regeneration described another line with two terminals of capacitor;
Phase detecting circuit diverter switch, switches and exports described input power phase place and the selected the described the 1st or the 2nd stationary phase information according to stand-by power supply switching signal;
And controller, according to the output of the output of described input power level sensitive circuit, described stand-by power supply switching signal and described phase detecting circuit diverter switch, PWM method is switched, generated simultaneously and export the connection cut-off signal of described bidirectional switch module.
2. PWM cycloconverter device according to claim 1, is characterized in that,
Described controller switches as follows according to described stand-by power supply switching signal, according to the output of described input power level sensitive circuit, be input voltage value and described input power phase place, the PWM method of inputting three-phase alternating current output by three-phase alternating current generates described connection cut-off signal, or according to described input voltage value and the described the 1st or the 2nd stationary phase information, the PWM method of inputting three-phase alternating current output by direct current generates described connection cut-off signal.
3. PWM cycloconverter device according to claim 1, is characterized in that possessing:
Output current detection circuit, detects the output current of described bidirectional switch module,
Described power regenerating judgment signal is generated according to the output electric current measure value of the output voltage instruction of described controller output and the output of described output current detection circuit by power regenerating judging circuit.
4. PWM cycloconverter device according to claim 2, is characterized in that possessing:
Output current detection circuit, detects the output current of described bidirectional switch module,
Described power regenerating judgment signal is generated according to the output electric current measure value of the output voltage instruction of described controller output and the output of described output current detection circuit by power regenerating judging circuit.
5. PWM cycloconverter device according to claim 2, is characterized in that,
Described controller exports described stand-by power supply switching signal to described power switcher, according to described stand-by power supply switching signal, by described power switcher, described three-phase alternating-current supply and described three-wire type DC power supply are switched, according to described stand-by power supply switching signal, switch as follows, PWM method by the described three-phase alternating current input three-phase alternating current output using the voltage of described three-phase alternating-current supply as input generates described connection cut-off signal, or the PWM method by the described direct current input three-phase alternating current output using the voltage of described three-wire type DC power supply as input generates described connection cut-off signal.
6. PWM cycloconverter device according to claim 4, is characterized in that,
Described controller exports described stand-by power supply switching signal to described power switcher, according to described stand-by power supply switching signal, by described power switcher, described three-phase alternating-current supply and described three-wire type DC power supply are switched, according to described stand-by power supply switching signal, switch as follows, PWM method by the described three-phase alternating current input three-phase alternating current output using the voltage of described three-phase alternating-current supply as input generates described connection cut-off signal, or the PWM method by the described direct current input three-phase alternating current output using the voltage of described three-wire type DC power supply as input generates described connection cut-off signal.
7. PWM cycloconverter device according to claim 5, is characterized in that,
Possess and detect the abnormal also power supply abnormality detection circuit of out-put supply anomaly detection signal of described three-phase alternating-current supply,
Described stand-by power supply switching signal is described abnormity of power supply detection signal, when not exporting described abnormity of power supply signal, by described power switcher, switch to described three-phase alternating-current supply, when the described abnormity of power supply detection signal of output, by described power switcher, switch to described three-wire type DC power supply, described controller is not when exporting described anomaly detection signal, PWM method by the described three-phase alternating current input three-phase alternating current output using the voltage of described three-phase alternating-current supply as input generates described connection cut-off signal, when the described anomaly detection signal of output, PWM method by the described direct current input three-phase alternating current output using the voltage of described three-wire type DC power supply as input generates described connection cut-off signal.
8. PWM cycloconverter device according to claim 5, is characterized in that,
Described controller is when charging with capacitor to described regeneration, in the bidirectional switch group forming at 3 bidirectional switchs by connecting each phase of input three-phase and output one phase in described bidirectional switch module with three groups, in all bidirectional switch groups, make and be connected in the bidirectional switch that described storage battery and the described regeneration input with the common tie point of capacitor is connected and disconnect, and connect together with 2 bidirectional switchs that make to be connected with other two inputs at least one bidirectional switch group.
9. PWM cycloconverter device according to claim 6, is characterized in that,
Possess and detect the abnormal also power supply abnormality detection circuit of out-put supply anomaly detection signal of described three-phase alternating-current supply,
Described stand-by power supply switching signal is described abnormity of power supply detection signal, when not exporting described abnormity of power supply signal, by described power switcher, switch to described three-phase alternating-current supply, when the described abnormity of power supply detection signal of output, by described power switcher, switch to described three-wire type DC power supply, described controller is not when exporting described anomaly detection signal, PWM method by the described three-phase alternating current input three-phase alternating current output using the voltage of described three-phase alternating-current supply as input generates described connection cut-off signal, when the described anomaly detection signal of output, PWM method by the described direct current input three-phase alternating current output using the voltage of described three-wire type DC power supply as input generates described connection cut-off signal.
10. PWM cycloconverter device according to claim 6, is characterized in that,
Described controller is when charging with capacitor to described regeneration, in the bidirectional switch group forming at 3 bidirectional switchs by connecting each phase of input three-phase and output one phase in described bidirectional switch module with three groups, in all bidirectional switch groups, make and be connected in the bidirectional switch that described storage battery and the described regeneration input with the common tie point of capacitor is connected and disconnect, and connect together with 2 bidirectional switchs that make to be connected with other two inputs at least one bidirectional switch group.
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| JP2009224450 | 2009-09-29 | ||
| JP2009-224450 | 2009-09-29 | ||
| JP2010183854A JP4983968B2 (en) | 2009-09-29 | 2010-08-19 | PWM cycloconverter device |
| JP2010-183854 | 2010-08-19 |
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| CN102035360A (en) | 2011-04-27 |
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